CN101028914B - Jack wheel installation structure with shock absorber - Google Patents

Abstract

The present invention discloses a jack wheel structure with a shock-absorbing device, which is a shock-absorbing wheel suitable for the rear wheel of a horizontal jack. The structure mainly comprises a bracket, a straight shaft, a compression spring and a shaft sleeve. The shaft sleeve is pre-fixed on the rear wheel top cover of the jack. The compression spring is inserted into the straight shaft and then implanted into the shaft sleeve to form a buckling positioning. The straight shaft and the bracket are fixedly combined, so the purpose of always keeping the jack in a four-wheel ground state can be achieved, so the impact of the jack wheel on the ground can be reduced, and the noise can be reduced.

Description

Jack wheel installation structure with shock absorber

technical field

The invention relates to a jack wheel mounting structure, in particular to a shock-absorbing rear wheel structure which is very suitable for use in combination with the rear wheel top cover of a horizontal jack.

Background technique

Known jack rear wheel structure as shown in Figure 1, it is a kind of rear wheel structure that is used in horizontal jack (or claims " warehouse type jack "), and its composition comprises a support 10 and straight shaft 20, and this support 10 combines A rotatable wheel 30, the straight shaft 20 runs through the rear wheel top cover 40 of the jack, and is fixedly screwed with a nut 50, and a group of known ball bearings 60 are arranged on the bracket 10, so that the wheel 30 can rotate freely; The rear wheel composition of the above-mentioned known horizontal jack has relatively high requirements on welding and manufacturing, but it is still difficult to avoid the unevenness of the four wheels, especially after the jack has been used for a long time, it will produce a certain permanent deformation, which will also cause The unevenness of the four wheels, if the unevenness of the four wheels occurs, the impact force on the ground will of course be relatively large during the process of pushing and moving the jack, which will not only easily damage the ground plane, but also cause damage to The voice must also be louder.

Contents of the invention

The technical problem to be solved by the present invention is to provide a jack wheel installation structure with a shock absorber, which is especially suitable for installation on the rear wheel part of a horizontal jack. No matter when it is empty or heavy, it can ensure that the four wheels of the jack are always on the ground. Therefore, when the jack is moving, the impact and damage caused by the wheels to the ground can be reduced, and the noise can be reduced.

The technical solution of the present invention is: a jack wheel installation structure with a shock absorber, suitable for being installed on the rear wheel part of a horizontal jack, the horizontal jack is provided with four wheels, including two front wheels and Two rear wheels, and extend from the front and rear sides of the horizontal jack seat body respectively to form a front wheel top cover and a rear wheel top cover. The jack wheel installation structure with a shock absorber includes a support, a straight shaft, A compression spring and an axle sleeve; the bracket is pivoted to fix a rear wheel, and the upper end is combined with a bearing, wherein: the straight shaft is a cylinder, and the selected middle section has a larger stepped column, and the lower end of the stepped column The cylinder and the bracket form a fixed combination, and the upper cylinder of the stepped column is used for a compression spring sleeve; the compression spring is matched with the upper cylinder of the straight shaft, and forms a resistance to the larger stepped column; the sleeve, Fixed on the rear wheel top cover of the horizontal jack, the bushing is a hollow kit for the straight shaft and the compression spring to be accommodated, and one end of the straight shaft is fixed to the bushing; the above bracket, the main shaft, the compression spring and the bushing are composed The jack wheel installation structure with shock-absorbing device, the straight shaft moves up and down in the bushing in conjunction with the telescopic action of the compression spring, so that it can automatically stretch and adjust the contact engagement between the rear wheel and the ground, so as to ensure the four wheels of the horizontal jack Always maintain a good grounding condition.

The features and advantages of the present invention are: the present invention discloses a jack wheel mounting structure with a shock absorbing device, specifically a shock absorbing wheel mounting structure suitable for the rear wheel of a horizontal jack, and the axle sleeve is pre-fixed on the For the rear wheel top cover of the horizontal jack, the compression spring is inserted into the straight shaft and then implanted into the shaft sleeve to form a snap-fit positioning, and the straight shaft and the bracket are fixedly combined, so the jack can always keep the four wheels on the ground. It can reduce the impact of the jack wheels on the ground, has a very good shock absorbing effect, and reduces noise; the bushing can be welded and easily combined with the rear wheel top cover of the jack. Since the compression spring has an automatic expansion and contraction effect, it is connected to the rear wheel top The welding combination of the cover is not very demanding. Even if there is a height difference, it will be automatically balanced and adjusted to keep the four wheels in a good grounding state. The overall composition is simple and easy to assemble.

Description of drawings

Fig. 1 is the assembly schematic diagram of known horizontal jack rear wheel structure.

Fig. 2 is a diagram of an embodiment of the present invention used in a horizontal jack.

Fig. 3 is an exploded perspective view of the present invention.

Fig. 4 is a combined sectional view of the present invention in the no-load state.

Fig. 5 is a combined sectional view of the present invention in a heavy load state.

Detailed ways

The technical solution, features and advantages of the present invention are described in detail below in conjunction with the accompanying drawings:

As shown in Figure 2, the jack wheel with the shock absorber proposed by the present invention is specially used for the attached wheel of the jack, and is especially suitable for providing the combined composition of the rear wheel top cover 5 of the known horizontal jack, so that the horizontal The rear wheel part of the formula jack has a shock-absorbing effect, which can be automatically telescopically adjusted and engaged with the sticking touch of the ground, so as to achieve the purpose that the four wheels (comprising two front wheels 61 and two rear wheels 71) keep on the ground all the time.

As shown in Figure 3, the composition of the present invention mainly includes a bracket 1, a straight shaft 2, a compression spring 3 and a shaft sleeve 4; wherein:

Bracket 1, which is the same as the known bracket, is made of a bracket 1 in the form of a ㄇ-shaped seat to pivotally fix a rear wheel 71, and the upper end is combined with a ball bearing 11;

The straight shaft 2 is a cylinder, and its selected middle section has a larger stepped column 21, and the lower end cylinder 22 of the stepped column 21 penetrates through the middle hole of the ball bearing 11 to form a riveting fixation with the bracket 1 (as shown in Fig. 4 As shown), the upper cylinder 23 of the stepped column 21 is provided with a compression spring 3, and the front end of the upper cylinder 23 is provided with one or more snap ring grooves 231;

Compression spring 3, which can be matched and placed on the upper end cylinder 23 of the straight shaft 2, and forms a resistance to the larger stepped column 21, and the design value of the support elasticity of the compression spring 3 is greater than 1/4 of the net weight of the horizontal jack, But less than 1/2 of the net weight of the horizontal jack;

The axle sleeve 4 is pre-fixed on the rear wheel top cover 5 of the jack, and its fixing method can be fixed by simple welding as shown in the figure (as shown in the welding part 8), or other locking methods can also be used. The axle sleeve 4 is a hollow sleeve, which can accommodate the straight shaft 2 and the compression spring 3, and the straight shaft 2 is properly protruded from the sleeve 4, and a washer 41 and a buckle 42 are used to form a sleeve buckle, so that one end of the straight shaft 2 is fixed on the shaft sleeve 4;

The jack wheel composed of the above-mentioned bracket 1, straight shaft 2, compression spring 3 and shaft sleeve 4 is especially suitable for being installed on the rear wheel part of a horizontal jack. The combination of the configuration of the sleeve 4 enables the straight shaft 2 to move up and down in the shaft sleeve 4 due to the expansion and contraction of the compression spring 3, and automatically expands and adjusts to touch and engage with the ground. The overall composition is extremely simple, and the assembly is very easy. Very good shock absorbing effect, no matter when the jack is unloaded (as shown in Figure 4) or when it is heavily loaded (as shown in Figure 5), it can ensure that the four wheels (two front wheels 61 and two rear wheels 61) of the jack Wheel 71) keeps a good landing state all the time, therefore can reduce the impact and damage caused by the jack wheel to the ground, and reduce its noise.

The horizontal jack as shown in the figure extends from the front and rear sides of the jack base 100 to form a front wheel top cover 6 and a rear wheel top cover 5 respectively. This is a known structure, so it will not be repeated here. And the "jack wheel with shock-absorbing device" of the present invention is particularly suitable for being applied to the rear wheel top covers 5 on both sides of the rear end of the horizontal jack, so that the four wheels can always keep on the ground.

Above-mentioned compression spring 3, the design value of its supporting elasticity is greater than the net weight of 1/4 horizontal jack, but less than the net weight of 1/2 horizontal jack, therefore, when the horizontal jack has no load state (as shown in Figure 4), if If the four wheels are uneven, the four wheels can still be on the same plane through the automatic adjustment of the compression spring 3; when the load is applied to the horizontal jack, the force on the tail of the horizontal jack is greater than twice the design value of the compression spring 3 , so the compression spring 3 can be fully compressed, and the rear wheel support 1 and the rear wheel top cover 5 can contact each other (as shown in Figure 5), so as to increase its stress surface and improve its durable life.

Although the present invention has been disclosed with specific embodiments, it is not intended to limit the present invention. Any person skilled in the art can make replacements of equivalent components without departing from the concept and scope of the present invention, or replace them according to the present invention. The equivalent changes and modifications made in the scope of patent protection should still fall within the scope of this patent.

Claims (5)

1. A jack wheel installation structure with a shock absorber, suitable for being installed on the rear wheel part of a horizontal jack, the horizontal jack is provided with four wheels, including two front wheels and two rear wheels, and The front wheel top cover and the rear wheel top cover are respectively extended from the front and rear sides of the horizontal jack base body. The jack wheel installation structure with a shock absorber includes a bracket, a straight shaft, a compression spring and an axle sleeve; The bracket is pivoted to fix a rear wheel, and the upper end is combined with a bearing, which is characterized in that: The straight axis is a cylinder with a larger stepped column in the selected middle section, the lower end of the stepped column is fixedly combined with the bracket, and the upper end of the stepped column is used for a compression spring sleeve; The compression spring is matched with the upper cylinder of the straight shaft and forms a resistance to the larger stepped column; The shaft sleeve is fixed on the rear wheel top cover of the horizontal jack. The shaft sleeve is a hollow kit for accommodating the straight shaft and the compression spring, and one end of the straight shaft is fixed to the shaft sleeve; The above-mentioned bracket, straight shaft, compression spring and shaft sleeve form a jack wheel installation structure with a shock absorber. The straight shaft moves up and down in the shaft sleeve in conjunction with the telescopic action of the compression spring, so that the adhesion between the rear wheel and the ground can be automatically adjusted by telescopic adjustment. touch engagement to ensure that the four wheels of the floor jack are always on good ground. 2 . The jack wheel installation structure with a shock absorbing device according to claim 1 , wherein the lower end column of the straight-axis stepped column is riveted and fixed to the bracket. 3 . 3. The jack wheel installation structure with shock absorbing device as claimed in claim 1, characterized in that, the front end of the upper end cylinder of the stepped column of the straight axis is provided with one or more snap ring grooves, and the washer is used to and the clasp to form a sleeve fastening, so that one end of the straight shaft is fixed on the shaft sleeve. 4. The jack wheel installation structure with shock-absorbing device as claimed in claim 1, characterized in that, the design value of the compression spring support elasticity is greater than the net weight of 1/4 horizontal jack, but less than 1/2 of the horizontal jack net weight. 5. The jack wheel mounting structure with a shock absorbing device as claimed in claim 1, wherein the axle sleeve is fixed to the rear wheel top cover of the horizontal jack by welding. the

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