CN109720397B - Brake device of baby carriage - Google Patents

Abstract

The invention discloses a baby carriage brake device which comprises a support frame and a locking hub coaxially mounted with a baby carriage wheel, wherein a pedal system and a locking mechanism are mounted on the support frame, the pedal system comprises a pedal mechanism and a reset pedal mechanism matched with the pedal mechanism, the pedal mechanism is connected with the locking mechanism, the locking mechanism is connected with a locking pin, and more than 1 locking groove for the locking pin to insert is formed in the locking hub. According to the baby carriage brake device, the pedal system is divided into the pedal mechanism and the reset pedal mechanism, so that the baby carriage brake device is convenient to operate, the use frequency is reduced, and the service life of the brake device is effectively prolonged.

Description

Braking device for baby carriage

technical field

The invention relates to a brake device for a baby carriage.

Background technique

The brake system of baby stroller is an important protection measure for vehicle safety, and its performance is not only related to the safety of use, but also affects the operability. Most mid-to-high-end strollers use a single-foot double-brake structure to brake the vehicle. The structure is simple, the braking effect is reliable, and only one foot is required to complete the operation. However, when this structure is unlocked, the pedal needs to be lifted by the back of the foot, which is laborious to operate and can make the shoe upper dirty. In addition, the friction between the parts of this structure is large, and long-term use will cause serious wear and deformation. Therefore, it is of great practical significance to develop a simpler and more flexible brake device for baby carriages.

Contents of the invention

The object of the present invention is to provide a brake device for a baby carriage, which divides the pedal system into a pedal mechanism and a reset pedal mechanism, which is not only easy to operate, but also reduces the frequency of use and effectively improves the service life of the brake device.

In order to achieve the above object, the technical solution of the present invention is: a baby stroller braking device, including a support frame and a locking hub coaxially installed with the baby stroller wheel, a pedal system and a locking mechanism are installed on the support frame, the The pedal system includes a pedal mechanism and a reset pedal mechanism used in conjunction with the pedal mechanism. The pedal mechanism is connected with a locking mechanism, and the locking mechanism is connected with a locking pin. There are more than one locking mechanism on the locking hub. Locking groove into which the tight pin fits.

The pedal mechanism includes a pedal rod, which is rotationally connected with the support frame through a rotating shaft, the pedal rod is connected with the pedal, and a hook is installed on the pedal near the side of the reset pedal mechanism.

A pedal chute is opened on the pedal rod along its length direction, a pedal is installed in the pedal chute, and the pedal rod is connected with the pedal through the pedal chute through the first screw.

The reset pedal mechanism includes a torsion shaft, and the torsion shaft is rotatably installed on the support frame, and the torsion shaft is connected with a six-sided straight rod, and a positioning hook locked with a hook is installed on the six-sided straight rod; A reset pedal is also installed on the six-sided straight bar, and the reset pedal and the pedal are misplaced and installed.

A first spring column is installed on the torsion shaft, a second spring column is installed on the support frame, the first spring column is connected with one end of the extension spring, and the other end of the extension spring is connected with the second spring column .

The locking mechanism includes a mounting block, the mounting block is connected to the support frame, and a chute is opened on the mounting block away from the side connected to the support frame, a slide bar is slidably installed in the chute, and the slide bar is installed in the chute. A compression spring is installed between the bar and the bottom of the chute, one end of the locking pin is connected with the slide bar, and the other end of the locking pin passes through the compression spring and the mounting block and is connected with the locking wheel hub; the side away from the compression spring The slide bar is connected to the first connecting rod through the first connecting pin, the first connecting rod on the side away from the sliding bar is connected to the second connecting rod through the second connecting pin, and the first connecting rod on the side away from the first connecting rod is connected to the second connecting rod. The second connecting rod is connected with the rotating shaft.

A sliding groove for inserting the first connecting rod is opened on the mounting block.

The locking hub outside the locking groove is provided with a guiding groove, and the guiding groove is connected and installed with the locking groove; and the groove diameter of the guiding groove at the end connected with the locking groove is The groove diameter is smaller than the groove diameter of the guide groove away from the end of the locking groove.

A buffer pad is installed on the inner wall of the hook and/or the inner wall of the positioning hook.

Both the hook and the positioning hook are made of chromium, and the outer wall of the hook and/or the outer wall of the positioning hook is coated with a wear-resistant layer, and the wear-resistant layer is composed of the following raw materials in mass percentage:

The beneficial effects of the present invention are:

(1) The present invention adopts the connecting rod slider mechanism to brake the wheels of the stroller, which is flexible and reliable, has small friction and long service life;

(2) The present invention adopts the method of separating the functions of the pedal and the reset pedal, avoiding lifting the pedal with the instep when the wheel is unlocked, which not only saves effort, but also prevents the vamp from being soiled.

(3) The present invention adopts a spring return method to enable the locking mechanism and the pedal mechanism to be quickly unlocked after release.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the partially enlarged schematic diagram of A in Fig. 1;

Fig. 3 is a structural schematic diagram of locking the hook and the positioning hook.

Detailed ways

Example 1

As shown in Figure 1, a brake device for a stroller includes a support frame 1 and a lock hub 2 coaxially installed with the wheel of the stroller, a pedal system and a locking mechanism are installed on the support frame 1, and the pedal system includes The pedal mechanism and the reset pedal mechanism used in conjunction with the pedal mechanism, the pedal mechanism is connected with the locking mechanism, the locking mechanism is connected with the locking pin 3, and more than one locking pin is provided on the locking hub 2. The pin 3 is inserted into the locking groove 4.

The pedal mechanism includes a pedal rod 11, the pedal rod 11 is rotationally connected with the support frame 1 through the rotating shaft 12, the pedal rod 11 is connected with the pedal 13, and a hook is installed on the pedal 13 near the side of the reset pedal mechanism 14.

A pedal chute 15 is provided on the pedal rod 11 along its length direction, and a pedal 13 is installed in the pedal chute 15 , and the pedal rod 11 is connected with the pedal 13 through the pedal chute 15 through a first screw 16 .

The pedal 13 described in this embodiment can slide along the pedal chute 15 when installed. For fathers with larger feet, the distance between the movable pedal 13 and the reset pedal 24 can be avoided to drive the pedal 13 when stepping on it. The reset pedal 24 on the side; for mothers with smaller feet, the distance between the pedal 13 and the reset pedal 24 can be reduced, but it is enough to ensure that the pedal 13 and the reset pedal 24 are misaligned up and down, and the distance between the pedal 13 and the reset pedal 24 Relatively small, it is convenient to quickly switch between the pedal 13 and the reset pedal 24, thereby ensuring the timeliness of braking or releasing the brake.

The reset pedal mechanism includes a torsion shaft 21, and the torsion shaft 21 is rotatably installed on the support frame 1, and the torsion shaft 21 is connected with a six-sided straight rod 22, and the six-sided straight rod 22 is equipped with a hook 14 Locked positioning hook 23 ; a reset pedal 24 is also installed on the six-sided straight bar 22 , and the reset pedal 24 and the pedal 13 are misplaced and installed.

A first spring column 25 is installed on the torsion shaft 21, a second spring column 26 is installed on the support frame 1, the first spring column 25 is connected with one end of an extension spring 27, and the other end of the extension spring 27 is One end is connected with the second spring column 26 .

The extension spring 27 in this embodiment not only provides elastic force when the hook 14 and the positioning hook 23 are locked, thereby improving the locking firmness between the hook 14 and the positioning hook 23, but also when the hook 14 and the positioning hook 23 are separated At the same time, the reset tension is provided for the reset pedal 24, so that the reset pedal 24 can be automatically reset.

As shown in Figure 2, the locking mechanism includes a mounting block 31, which is connected to the support frame 1, and a sliding groove 32 is opened on the mounting block 31 on the side far away from the support frame 1. A slide bar 33 is slidably installed in the chute 32, a stage clip 34 is installed between the slide bar 33 and the bottom of the chute 32, and one end of the locking pin 3 is connected with the slide bar 33, and the locking pin 3 is in addition One end passes through the compression spring 34 and the mounting block 31 and is connected to the locking hub 2; the slide bar 33 on the side away from the compression spring 34 is connected to the first connecting rod 36 through the first connecting pin 35, and the side away from the slide bar 33 The first connecting rod 36 is connected to the second connecting rod 38 through the second connecting pin 37 , and the second connecting rod 38 on the side away from the first connecting rod 36 is connected to the rotating shaft 12 .

The mounting block 31 defines a sliding groove 39 for inserting the first connecting rod 36 .

The setting of the sliding groove 39 in this embodiment can expand the rotation range of the first connecting rod 36, and the first connecting rod 36 can be embedded in the sliding groove 39 when it is pressed down, so that the sliding rod 33 can be as close as possible to the sliding groove 32 The bottom of the groove, so that the locking pin 3 can protrude from the mounting block 31 to the greatest extent. The longer the locking pin 3 protrudes from the mounting block 31, the deeper the length of the insertion into the locking groove 4, so as to ensure the locking The stability of the locking hub 2 prevents the locking pin 3 from being separated from the locking hub 2 due to external force because the length inserted into the locking groove 4 is not deep enough, thereby losing the function of locking and braking.

The locking hub 2 outside the locking groove 4 is provided with a guiding groove 5, and the guiding groove 5 is connected and installed with the locking groove 4; and the guiding groove at one end connected with the locking groove 4 The groove diameter of the groove 5 is smaller than the groove diameter of the guide groove 5 away from the end of the locking groove 4 .

The setting of the guide groove 5 described in this embodiment can guide the locking pin 3 to be inserted into the locking groove 4 . Since more than one locking groove 4 is provided on the locking hub 2, there is a gap between two adjacent locking grooves 4. If the locking pin 3 slides down when locking the locking hub 2, Contacting the locking hub 2 between the two locking grooves 4 will cause the locking pin 3 to fail to lock the brake locking hub 2, thereby failing to function as a brake. The setting of the guide groove 5 can expand the scope of the locking groove 4, reduce the gap between two adjacent locking grooves 4, and when the locking pin 3 slides down on the locking and locking hub 2, the contact When it is on the locking hub 2 between the two locking grooves 4, it can slide into the locking groove 4 through the guide groove 5, so as to function as a brake.

A buffer pad 6 can be installed on the inner wall of the hook 14 , or a buffer pad 6 can be installed on the inner wall of the positioning hook 23 . Or both the inner sidewall of the hook 14 and the inner sidewall of the positioning hook 23 are equipped with buffer pads 6 . According to the requirements for the stability when the hook 14 and the positioning hook 23 are locked, the installation method of the buffer pad 6 can be selected according to the actual situation. The buffer pad 6 is installed on the inner wall of the hook 14 and the inner wall of the positioning hook 23 described in this embodiment.

When the hook 14 and the positioning hook 23 described in this embodiment are locked, the buffer pad 6 can avoid the rigid extrusion friction of the two, thereby reducing the strength of the joint between the hook 14 and the positioning hook 23; When the positioning hook 23 is locked, the buffer pad 6 will be squeezed and deformed, and the deformation of the buffer pad 6 can fill the gap between the hook 14 and the positioning hook 23, thereby improving the stability of the hook 14 and the positioning hook 23 sex.

Both the snap hook 14 and the positioning hook 23 are made of chrome. Chromium is the metal with the highest hardness. For the arc-shaped grab hook 14 and positioning hook 23, the curved surface made of chromium has high hardness and less wear.

The outer wall of the hook 14 can be coated with a wear-resistant layer, or the outer wall of the positioning hook 23 can be coated with a wear-resistant layer. Or both the outer walls of the grab hook 14 and the positioning hook 23 are coated with a wear-resistant layer. According to the requirements for the strength of the hook 14 and the positioning hook 23, a wear-resistant layer can be coated on the outer wall of the hook 14 and the positioning hook 23 according to the actual situation. The outer walls of the hook 14 and the positioning hook 23 described in this embodiment are coated with a wear-resistant layer. The provision of the wear-resistant layer can reduce the amount of wear of the hook 14 and the positioning hook 23 , thereby improving the strength of the hook 14 and the positioning hook 23 .

The wear-resistant layer consists of the following raw materials in mass percentage:

Graphene has good toughness. Adding graphene to novolac epoxy resin can enhance the toughness of novolac epoxy resin after curing, thereby improving the wear resistance and lubricity of novolac epoxy resin. The hardness of silicon carbide powder is very high, and the addition of silicon carbide powder can improve the wear resistance of the wear-resistant layer. The tin powder can improve the strength of the wear-resistant layer, if the amount of tin powder is small, the effect of improving the strength of the wear-resistant layer cannot be achieved, and if the amount of tin powder is too large, there will be a tendency of enrichment.

As shown in Figure 3, when the baby carriage brake device described in this embodiment is in use without braking, the slide bar 33 is elastically supported by the compression spring 34, and the locking pin 3 does not contact the locking hub 2, so that the wheel It can rotate freely, and the stroller is running freely; at the same time, the hook 14 and the pedal 13 are in a straight state, and the hook end of the hook 14 is not in contact with the hook end of the positioning hook 23 .

When the brakes are needed, step on the pedal 13 with your feet, and simultaneously drive the pedal rod 11 and the rotating shaft 12 to rotate, and the first connecting rod 36 and the second connecting rod 38 drive the sliding rod 33 to move downward along the chute 32 under the drive of the rotating shaft 12 sliding, inserted into the locking groove 4 of the locking hub 2, locking the locking hub 2 and the wheel to prevent them from rotating; meanwhile, the hook 14 rotates under the drive of the pedal 13, and crosses the positioning hook 23 hook end, so that the hook 14 hook end is in contact with the positioning hook 23 hook end; Pulling prevents it from resetting.

When the vehicle finishes braking and needs to continue moving forward, step on the reset pedal 24 with your feet to rotate the positioning hook 23 until the grab 14 breaks away from the restriction of the positioning hook 23, and returns to a straight position under the action of the elastic force of the stage clip 34. Said slide bar 33 also returns to initial position, removes the restriction to locking wheel hub 2, and wheel can rotate freely.

The difference between Embodiment 2-11 and Embodiment 1 is that: the raw materials of the wear-resistant layer are calculated as the following table by mass percentage:

Novolak epoxy resin Graphene Silicon carbide powder tin powder Hardener Example 2 60 20 8 7 5 Example 3 61 19 9 6 5 Example 4 62 18 9 5 6 Example 5 62 17 10 5 6 Example 6 62 15 11 5 7 Example 7 63 14 11 5 7 Example 8 67 10 9 5 9 Example 9 68 10 8 5 9 Example 10 69 10 8 6 7 Example 11 66 10 14 5 5

comparative example

The difference between comparative examples 1-7 and embodiment 1 is that the raw materials for preparing the wear-resistant layer are calculated as the following table by mass percentage:

Novolak epoxy resin Graphene Silicon carbide powder tin powder Hardener Comparative example 1 65 0 15 10 10 Comparative example 2 65 15 0 10 10 Comparative example 3 65 16 12 0 7 Comparative example 4 80 0 0 10 10 Comparative example 5 70 20 0 0 10 Comparative example 6 75 0 15 0 10 Comparative example 7 90 0 0 0 10

Detection method

Wear resistance test

The wear-resistant coatings prepared in Example 1 and Comparative Examples 1-7 were all coated on the hooks and positioning hooks made of chrome, and the coating thickness was 80 μm.

The friction test is carried out on the hooks and positioning hooks coated with a wear-resistant coating layer. One cycle of clamping and loosening of the hooks and positioning hooks is one cycle. The friction test is carried out under the same temperature and humidity conditions. 8 groups of hooks and The positioning hooks are repeated 3000 times. After the cycle is completed, the wear conditions of the hooks and the positioning hooks are detected respectively. The wear conditions are as follows:

test group wear condition Example 1 The wear layer is not worn, and the chromium base layer cannot be seen by the naked eye Comparative example 1 The wear-resistant layer is worn out, and small pieces of chromium-based layer can be seen with the naked eye Comparative example 2 The wear-resistant layer is worn out, and small pieces of chromium-based layer can be seen with the naked eye Comparative example 3 The wear-resistant layer is worn out, and small pieces of chromium-based layer can be seen with the naked eye Comparative example 4 The wear-resistant layer is worn out, and the naked eye can see the large chromium base layer Comparative example 5 The wear-resistant layer is worn out, and the naked eye can see the large chromium base layer Comparative example 6 The wear-resistant layer is worn out, and the naked eye can see the large chromium base layer Comparative example 7 The wear-resistant layer is worn out, and the chrome-based layer can be seen by the naked eye

It can be seen from the above comparative examples and their detection lists that the hooks and positioning hooks coated with the wear-resistant layer of Example 1 do not present a chromium-based layer after 3000 repeated frictions. It can be seen that the wear-resistant layer of Example 1 has a The grinding effect is good, which can improve the wear resistance of the hooks and positioning hooks; the wear-resistant layers of the hooks and positioning hooks coated with the wear-resistant layer of Comparative Examples 1-3 are worn after 3000 times of repeated friction, which can be seen by naked eyes Small pieces of chromium base layer, its wear-resistant effect of the wear-resistant layer of visible comparative example 1-3 is compared with embodiment 1, and its wear-resistant performance declines; After 3000 times of repeated friction, the wear-resistant layer is worn out, and the large chromium base layer can be seen with the naked eye. It can be seen that the wear-resistant layer of Comparative Examples 4-6 has a higher wear-resistant effect than that of Comparative Examples 1-3. Further decline; the grab and the positioning hook coated with the wear-resistant layer of Comparative Example 7 are all worn out after 3000 repeated frictions, and the chromium base layer can be seen with the naked eye, which shows the wear-resistant effect of the wear-resistant layer of Comparative Example 7 Compared with Comparative Examples 4-6, its wear resistance further decreased.

The brake device for a baby carriage in this embodiment divides the pedal system into a pedal mechanism and a reset pedal mechanism, which not only facilitates the operation, but also reduces the frequency of use and effectively improves the service life of the brake device.

Claims (7)

1. The utility model provides a perambulator brake equipment which characterized in that: the locking mechanism comprises a support frame (1) and a locking hub (2) coaxially mounted with a baby carriage wheel, wherein a pedal system and a locking mechanism are mounted on the support frame (1), the pedal system comprises a pedal mechanism and a reset pedal mechanism matched with the pedal mechanism for use, the pedal mechanism is connected with the locking mechanism, the locking mechanism is connected with a locking pin (3), and more than 1 locking groove (4) for the locking pin (3) to be inserted into is formed in the locking hub (2); the reset pedal mechanism comprises a torsion shaft (21), the torsion shaft (21) is rotatably mounted on the support frame (1), the torsion shaft (21) is connected with a six-face straight rod (22), and a positioning hook (23) locked with the clamping hook (14) is mounted on the six-face straight rod (22); the six-face straight rod (22) is also provided with a reset pedal (24), and the reset pedal (24) and the pedal (13) are installed in a staggered mode; a first spring column (25) is mounted on the torsion shaft (21), a second spring column (26) is mounted on the support frame (1), the first spring column (25) is connected with one end of a tension spring (27), and the other end of the tension spring (27) is connected with the second spring column (26);

the clamping hook (14) and the positioning hook (23) are both made of chromium, the outer side wall of the clamping hook (14) and/or the outer side wall of the positioning hook (23) are/is coated with a wear-resistant layer, and the wear-resistant layer is composed of the following raw materials in percentage by mass:

2. the stroller brake apparatus according to claim 1, wherein: the pedal mechanism comprises a pedal rod (11), the pedal rod (11) is rotatably connected with the support frame (1) through a rotating shaft (12), the pedal rod (11) is connected with the pedal (13), and the pedal (13) close to one side of the reset pedal mechanism is provided with a clamping hook (14).

3. The stroller brake apparatus of claim 2, wherein: the pedal rod (11) is provided with a pedal sliding groove (15) along the length direction of the pedal rod, a pedal (13) is installed in the pedal sliding groove (15), and the pedal rod (11) penetrates through the pedal sliding groove (15) through a first screw (16) to be connected with the pedal (13).

4. The stroller brake apparatus of claim 1, wherein: the locking mechanism comprises a mounting block (31), the mounting block (31) is connected with the support frame (1), a sliding groove (32) is formed in the mounting block (31) far away from the side connected with the support frame (1), a sliding rod (33) is arranged in the sliding groove (32) in a sliding mode, a pressure spring (34) is arranged between the sliding rod (33) and the bottom of the sliding groove (32), one end of the locking pin (3) is connected with the sliding rod (33), and the other end of the locking pin (3) penetrates through the pressure spring (34) and the mounting block (31) to be in contact with the locking hub (2); the sliding rod (33) far away from one side of the pressure spring (34) is connected with the first connecting rod (36) through the first connecting pin (35), the first connecting rod (36) far away from one side of the sliding rod (33) is connected with the second connecting rod (38) through the second connecting pin (37), and the second connecting rod (38) far away from one side of the first connecting rod (36) is connected with the rotating shaft (12).

5. The stroller brake apparatus of claim 4, wherein: the mounting block (31) is provided with a sliding groove (39) for the first connecting rod (36) to be embedded in.

6. The stroller brake apparatus of claim 1, wherein: a guide groove (5) is formed in the locking hub (2) outside the locking groove (4), and the guide groove (5) is connected, communicated and mounted with the locking groove (4); and the groove diameter of the guide groove (5) at the end connected with the locking groove (4) is smaller than the groove diameter of the guide groove (5) at the end far away from the locking groove (4).

7. The stroller brake apparatus of claim 1, wherein: and a buffer pad (6) is arranged on the inner side wall of the clamping hook (14) and/or the inner side wall of the positioning hook (23).

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