CN205792003U - A kind of stroke limit structure of tube shaped electric machine - Google Patents

Abstract

The utility model discloses a stroke limit structure of a tubular motor, which comprises a stroke bracket and an electric control bracket arranged at intervals, a stroke head end cover is arranged on the axially outer side of the electric control bracket, and the stroke bracket and the electric control bracket There is a toothed rod between them, the two sides of the toothed rod are respectively provided with threaded rods, the threaded rods are provided with toothed nuts engaged with the toothed rods, and one end of the threaded rods is arranged on the travel bracket , the other end of the screw rod is coaxially provided with an adjustment shaft extending into the end cover of the stroke head, and an adjustment knob is also arranged in the end cover of the stroke head, and it is characterized in that: the adjustment knob and the adjustment The shaft is screwed together, and one end of the adjustment knob extends into the end cover of the stroke head, and communicates with the outside of the end cover of the stroke head from the axially outer side of the end cover of the stroke head.

Description

A stroke limit structure of tubular motor

technical field

The utility model relates to a tubular motor, in particular to a stroke limiting structure of the tubular motor.

Background technique

Existing projection screens, electric curtains, rolling doors, etc. are usually driven by motors for lifting. In order to limit the travel of projection screens, curtains, etc., a travel limiting structure is usually provided. There is an adjustment structure in the stroke limit structure, and by operating the adjustment structure, the stroke can be independently adjusted according to the actual lifting height of the projection screen or curtain without interfering with each other, which greatly facilitates the user.

For example, a stroke controller disclosed in a Chinese patent with application number 200420043592.7 is composed of a fixed base, a base, a fixed bracket arranged between the fixed base and the base, and an adjustment control device installed on the fixed bracket. An adjusting knob is arranged on the outer surface of the left end of the fixing seat. One end of the adjusting knob is threaded, and the inner hole is an adjusting tool hole. Adjust the knob to adjust the positions of the sliding gears on the two adjusting screw rods respectively to determine the stroke of raising and lowering, and control the size of the stroke by pre-adjusting the positions of the sliding gears on the two adjusting screw rods; No. 200420110102.0 Chinese patent discloses a tubular motor stroke limiter, and application number 200820170734.4 discloses a silent tubular motor stroke controller, etc., all adjusting knobs (screw, worm) are arranged at the same position .

However, in some special cases, due to the limitation of specific conditions such as installation space, setting the two adjustment knobs on the outer circular surface of the left end of the fixed seat will hinder the operation, which is not conducive to the adjustment of the stroke.

Utility model content

The technical problem to be solved by the utility model is to provide a stroke limiting structure of a tubular motor that improves the convenience of adjustment operation in view of the problems existing in the above-mentioned prior art.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: a stroke limit structure of a tubular motor, including a stroke bracket and an electric control bracket arranged at intervals, and a stroke head end cover is arranged on the axially outer side of the electric control bracket , a toothed rod is arranged between the stroke bracket and the electric control bracket, screw rods are respectively arranged on both sides of the said toothed rod, and a toothed nut engaged with the toothed rod is arranged on the screw rod, and the screw rod One end of the screw rod is set on the stroke bracket, and the other end of the screw rod is coaxially provided with an adjustment shaft extending into the end cover of the stroke head, and an adjustment knob is also arranged in the end cover of the stroke head, which is characterized in that : the adjusting knob is screwed with the adjusting shaft, one end of the adjusting knob extends into the end cover of the stroke head, and communicates with the outside of the end cover of the stroke head from the axially outer side of the end cover of the stroke head .

Preferably, a cover plate is further provided on the axially outer side of the stroke head end cover, and one end of the adjustment knob extends into the cover plate and communicates with the outside of the cover plate.

In order to facilitate the adjustment of the stroke through the operation of the adjustment tool, the end of the adjustment knob extending into the end cover of the stroke head is formed with an inner hole for matching with the adjustment tool, and the inner hole communicates with the outside of the end cover of the stroke head .

Preferably, the adjustment knob is screwed with straight teeth or bevel teeth at the end of the adjustment shaft.

The stroke limit is realized by a stroke switch, and the end of the screw rod close to the stroke bracket is provided with a bumper and a spring between the bumper and the stroke bracket, and the handle of the bumper passes through the stroke bracket , a travel switch is provided outside the travel bracket, and the travel switch corresponds to the end of the handle of the striker.

The driving device of the stroke limit mechanism also includes that the electric control bracket is provided with an inner tooth sleeve, one end of the tooth bar is rotatably connected with the stroke bracket, and the other end of the tooth bar is meshed with the inner tooth sleeve , the electric control bracket is also connected with the casing of the tubular motor, and the inner gear sleeve is connected with the transmission pipe of the tubular motor.

Compared with the prior art, the utility model has the advantages that: by setting the adjustment knob in the end cover of the stroke head and parallel to the axial direction of the gear bar, the end of the adjustment knob extends into the cover at the outer bottom of the end cover of the stroke head In the plate, so that the adjustment knob can be operated at the axial bottom of the entire tubular motor, and the adjustment operation can be conveniently performed even in a special installation environment.

Description of drawings

Fig. 1 is the schematic diagram of the tubular motor of the stroke limit structure application of the present utility model;

Fig. 2 is the schematic diagram of the travel limit structure of the present utility model;

Fig. 3 is a schematic diagram of the stroke limit mechanism of the present invention hiding the inner gear sleeve and the cover plate;

Fig. 4 is a partial schematic diagram of the stroke limiting structure of the present invention.

detailed description

The utility model is described in further detail below in conjunction with the accompanying drawings.

Referring to Figures 1 to 4, a stroke limit structure of a tubular motor includes a stroke bracket 1 and an electric control bracket 2 arranged at intervals. The housing 200 is connected, and the inner gear sleeve 21 is connected with the transmission pipe (not shown) of the tubular motor. A stroke head end cover 100 is arranged on the axially outer side of the electric control bracket 2 .

The stroke limit structure also includes a driving device and an actuator, wherein the driving device includes a toothed rod 3 arranged between the stroke bracket 1 and the electric control bracket 2, one end of the toothed rod 3 is rotatably connected with the stroke bracket 1, and the toothed rod 3 The other end extends toward the electric control bracket 2 and engages with the inner gear sleeve 21 at the end. Screw rods 4 are respectively arranged on both sides of the toothed rod 3 , each screw rod 4 is provided with a toothed nut 41 , the toothed nut 41 meshes with the toothed rod 3 , and the toothed nut 41 can move linearly relative to the screw rod 4 .

One end of the screw rod 4 is arranged on the stroke bracket 1, and the actuator includes a collision block 5 arranged on the end of the screw rod 4 close to the stroke bracket 1 and two bumpers arranged on the outside of the stroke bracket 1 (the side away from the electric control bracket 2). The travel switch 6 is used for the upper travel limit and the lower travel limit respectively. The handle 51 of the bumper 5 passes through the travel bracket 1, and each travel switch 6 corresponds to the end of the handle 51 of the corresponding bumper 5. This end of the screw mandrel 4 is also provided with a spring 42, and the two ends of the spring 42 are respectively The collision block 5 can be reset by being abutted between the collision block 5 and the travel bracket 1 . The other end of the screw mandrel 4 is coaxially provided with an adjustment shaft 7, one end of the adjustment shaft 7 is connected to the screw mandrel 4, and the other end extends into the stroke head end cover 100, and the adjustment shaft 7 extends into the stroke head end cover 100. A first thread 71 is formed on this end.

The stroke limit structure also includes two adjustment knobs 8, which are arranged in the stroke head end cover 100, and one end of each adjustment knob 8 extends into the stroke head end cover 100, and the adjustment knob 8 is formed with an inner hole 81 on this end , the inner hole 81 communicates with the outside of the stroke head end cover 100 from the axially outer side of the stroke head end cover 100, so that the adjustment tool can be inserted into the inner hole 81 and adjusted by rotating the adjustment knob 8, and this arrangement, even if It can also be operated conveniently under special installation environment. A second screw thread 82 is formed on the adjusting knob 8 so as to be screwed with the first screw thread 71 on the adjusting shaft 7 . The screwing of the adjusting shaft 7 and the adjusting knob 8 can be a straight tooth screwing, a bevel tooth screwing, or other screwing ways.

Optionally, the bottom of the stroke head end cover 100, that is, the axially outer side of the stroke head end cover 100 (the side away from the inner gear sleeve 21) can also be provided with a cover plate 101, and at this time one end of the adjustment knob 8 extends into the cover inside the board 101, and communicate with the outside of the cover board 101.

When in use, the transmission tube of the tubular motor drives the inner gear sleeve 21 to rotate, thereby transmitting the power to the gear bar 3 meshing with the inner gear sleeve 21, so that the gear bar 3 rotates, and the gear bar 3 drives the gear nut 41 meshing with it, Respectively move left and right along the respective screw rods 4. When the toothed nut 41 hits the bumper 5, the handle 51 on the bumper 5 presses the contact on the travel switch 6, so that the tubular motor cuts off the power supply and stops. turn.

Claims (6)

1. A stroke limit structure of a tubular motor, comprising a stroke bracket (1) and an electric control bracket (2) arranged at intervals, the axially outer side of the electric control bracket (2) is provided with a stroke head end cover (100) , a toothed rod (3) is arranged between the stroke support (1) and the electric control support (2), and screw rods (4) are respectively arranged on both sides of the toothed rod (3), and the screw rods (4) ) is provided with a toothed nut (41) meshing with the toothed rod (3), one end of the screw rod (4) is set on the stroke bracket (1), and the other end of the screw rod (4) An adjustment shaft (7) extending into the travel head end cover (100) is coaxially provided with an adjustment knob (8) inside the travel head end cover (100), which is characterized in that the adjustment knob (8) Screwed with the adjustment shaft (7), one end of the adjustment knob (8) extends into the stroke head end cover (100), and from the axial direction of the stroke head end cover (100) The outside communicates with the outside of the stroke head end cover (100). 2. The stroke limit structure of tubular motor according to claim 1, characterized in that: a cover plate (101) is arranged on the axially outer side of the stroke head end cover (100), and the adjustment knob (8) One end extends into the cover plate (101) and communicates with the outside of the cover plate (101). 3. The stroke limit structure of tubular motor according to claim 1, characterized in that: one end of the adjustment knob (8) extending into the end cover (100) of the stroke head is formed with a button for cooperating with the adjustment tool. The inner hole (81), the inner hole (81) communicates with the stroke head end cover (100). 4. The stroke limit structure of a tubular motor according to any one of claims 1 to 3, characterized in that: the adjustment knob (8) is screwed with the end of the adjustment shaft (7) with straight teeth or bevel teeth Spin together. 5. The stroke limit structure of a tubular motor according to any one of claims 1 to 3, characterized in that: a bumper (5) is arranged on the end of the screw rod (4) close to the stroke bracket (1). ) and the spring (42) between the bump (5) and the stroke bracket (1), the handle (51) of the bump (5) passes through the stroke bracket (1), and the stroke bracket (1) A travel switch (6) is arranged on the outside, and the travel switch (6) corresponds to the end of the handle (51) of the collision block (5). 6. The stroke limit structure of a tubular motor according to any one of claims 1 to 3, characterized in that: the electric control bracket (2) is provided with an inner tooth sleeve (21), and the tooth bar ( 3) is rotationally connected with the travel bracket (1), the other end of the gear bar (3) is engaged with the inner gear sleeve (21), and the electric control bracket (2) is also connected with the casing of the tubular motor (200) is connected, and the inner gear sleeve (21) is connected with the transmission pipe of the tubular motor.