Worm and gear speed reducer capable of adjusting clearance adaptation

Abstract

The utility model relates to the technical field of speed reducers, in particular to a worm and gear speed reducer capable of adjusting clearance adaptation, which comprises a speed reduction box, a worm gear, a worm, a large gear, a small gear and a plurality of bearings, the worm and the large gear are coaxially arranged, and the speed reducer further comprises a connecting seat and an adjusting component which are coaxially arranged. The connecting seat is arranged between the worm and the bull gear, the connecting seat is fixedly connected with the bull gear and is in axial sliding connection with the head end part of the worm, meanwhile, a spring is arranged in the connecting seat, and the worm is in compression joint with the spring; the adjusting assembly comprises a supporting shaft and an adjusting stud. The supporting shaft is arranged on the reduction gearbox in a penetrating mode through a bearing and is of a tubular structure. The supporting shaft is in axial sliding connection with the tail end part of the worm; the adjusting stud is in threaded connection with the inner wall of the supporting shaft, and the head end of the adjusting stud is connected with the tail end of the worm in a pressing mode. By means of the worm gear adjusting device, the meshing gap between the worm gear and the worm can be adjusted conveniently and rapidly.

Description

Technical Field

[0001] The utility model relates to the technical field of speed reducers, and specifically relates to a worm and worm gear speed reducer with adjustable clearance adaptation. Background Technique

[0002] A worm and worm gear speed reducer is a speed reduction device commonly used in the industrial transmission field, and realizes the speed reduction effect through the meshing transmission of the worm and the worm gear. The worm and worm gear speed reducer usually has the characteristics of small volume, large transmission ratio, low noise, high efficiency, etc., and is suitable for occasions that require large torque and low-speed rotation.

[0003] In the worm and worm gear transmission, too large a clearance between the worm and the worm gear will cause gaps and looseness during transmission, affecting the transmission efficiency and accuracy. Too small a clearance between the worm and the worm gear will cause a large axial force in the transmission system, increasing the wear and noise of the transmission parts. For this reason, in the prior art, such as a worm and worm gear speed reducer with adjustable shaft clearance adaptation in a Chinese patent, publication number: CN118532462A, realizes the adjustment of the clearance between the worm and the worm gear by setting an adapter worm mechanism inside the speed reduction box, and it is necessary to open the speed reduction box during adjustment, making the adjustment not convenient and fast enough. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a worm and worm gear speed reducer with adjustable clearance adaptation, which can conveniently and quickly adjust the clearance between the worm and the worm gear.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A worm and worm gear speed reducer with adjustable clearance adaptation, including a speed reduction box and a worm, a worm gear, a large gear, a small gear and several bearings arranged inside the speed reduction box, wherein the worm and the large gear are coaxially arranged. The speed reducer further includes a coaxial connection seat and an adjustment assembly; the connection seat is between the worm and the large gear. Among them, the connection seat is fixedly connected to the large gear and axially slidably connected to the head end of the worm. At the same time, a spring is arranged inside the connection seat, and the worm is press-connected to the spring; the adjustment assembly includes a support shaft and an adjustment stud; the support shaft is arranged on the speed reduction box through a bearing in a penetrating manner, and the support shaft is a tubular structure; the support shaft is axially slidably connected to the tail end of the worm; the adjustment stud is threadedly connected to the inner wall of the support shaft and the head end of the adjustment stud is press-connected to the tail end of the worm.

[0006] Preferably, the connection seat further includes a chassis and a sleeve; the sleeve is coaxially and fixedly connected to the chassis; the chassis is fixedly connected to the large gear; the spring is arranged inside the sleeve; the head end of the worm is axially slidably arranged inside the sleeve.

[0007] Preferably, a key is arranged on the outer circumference of the head end of the worm; a key groove adapted to the key is arranged on the inner wall of the sleeve.

[0008] Preferably, a connecting sleeve is fixedly provided at the tail end of the worm; a key groove is formed in the connecting sleeve; a key adapted to the key groove of the connecting sleeve is provided on the outer periphery of the head end of the support shaft.

[0009] Preferably, the connecting sleeve includes a sleeve body and a partition; the partition is arranged in the sleeve body; the adjusting stud is press-connected with the partition.

[0010] Preferably, the adjusting assembly further includes an end cap; the end cap is fixedly sleeved on the tail end of the support shaft.

[0011] Preferably, an inner hexagonal hole is formed in the axis of the tail end of the adjusting stud.

[0012] Preferably, the end cap is threadedly connected with the support shaft.

[0013] Preferably, the length of the support shaft is not less than the length of the adjusting stud.

[0014] Preferably, the chassis is fixedly connected with the large gear by bolts.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: by arranging a compression spring at the head end of the worm, and an extrusion member support shaft and an adjusting stud at the tail end of the worm, the worm can be displaced axially relative to the worm gear by screwing in or screwing out the adjusting stud, so that the structure of this speed reducer is not only simple, but also the operation of adjusting the gap between the worm gear and the worm is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of Embodiment 1 of the present utility model;

[0017] Figure 2 is a schematic cross-sectional view of the present utility model parallel to the axis of the worm;

[0018] Figure 3 is a schematic cross-sectional view of the connecting sleeve of the present utility model.

[0019] In the figure: 1 box body, 2 worm gear, 3 worm, 4 large gear, 5 small gear, 6 input shaft, 7 connecting seat, 71 chassis, 72 sleeve, 73 spring, 8 connecting sleeve, 81 sleeve body, 82 partition, 83 key groove, 9 adjusting assembly, 91 support shaft, 92 adjusting stud, 93 end cap, 10 bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes the specific embodiments of the present utility model in detail with reference to the drawings, so that those skilled in the art can more clearly understand how to practice the present utility model. Although the present utility model is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative and do not limit the scope of the present utility model.

[0021] Specific Embodiment 1: Please refer toFigures 1-3 An adjustable clearance adapted worm and worm gear reducer, comprising: a box cover (not shown in the figure), a box body 1, a worm wheel 2, a worm 3, a large gear 4, a small gear 5, an input shaft 6, a connecting seat 7, a connecting sleeve 8, an adjusting component 9 and a plurality of bearings 10. The box cover is arranged on the box body 1 to seal the inner cavity of the box body 1. The worm wheel 2, the large gear 4 and the small gear 5 are all arranged inside the box body 1 through bearings. Among them, the small gear 5 meshes with the large gear 4. The input shaft 6 is fixedly connected to the axis center of the small gear 5 and at least part of the input shaft 6 extends outside the box body 1. The adjusting component 9 is arranged on the box body 1 through a bearing 10. The worm 3 is arranged between the large gear 4 and the adjusting component 9 through the connecting seat 7 and the connecting sleeve 8 and meshes with the worm 3. The axial displacement of the worm 3 can be realized through the adjusting component 9, so that the clearance between the worm wheel and the worm can be conveniently adjusted.

[0022] Specifically, the connecting seat 7 includes a chassis 71, a sleeve 72 and a spring 73. The sleeve 72 is coaxially and fixedly connected to the chassis 71. The chassis 71 is coaxially and fixedly connected to the large gear 4 through bolts. The spring 73 is arranged inside the sleeve 72. The head end of the worm 3 is slidably arranged inside the sleeve 72 and is pressed against the spring 73. At the same time, in order to ensure the rotation efficiency of the worm 3, a key is arranged at the head end of the worm 3, and a keyway matching the key is arranged on the inner wall of the sleeve 72.

[0023] Please refer to Figure 3 , the connecting sleeve 8 is composed of a sleeve body 81 and a partition plate 82. The partition plate 82 divides the inner cavity of the sleeve body 81 into two parts. The sleeve body 81 is fixedly sleeved on the tail end of the worm 3, so that the connecting sleeve 8 can rotate synchronously with the worm 3 and the large gear 4. A keyway is arranged on the inner circumference of the tail end of the sleeve body 81.

[0024] The adjusting component 9 includes a support shaft 91, an adjusting stud 92 and an end cover 93. The support shaft 91 is fixedly arranged on the box body 1 through a bearing 10 and is located on the opposite side of the large gear 4. The head end of the support shaft 91 is slidably arranged inside the sleeve body 81. At the same time, a key adapted to the keyway of the sleeve body 81 is arranged on the outer circumference of the support shaft 91, so that the support shaft 91 can axially slide inside the sleeve body 81 without circumferential rotation;

[0025] In this embodiment, the support shaft 91 is a tubular structure with internal threads provided on its inner side; the adjusting stud 92 is disposed within the support shaft 91 and is threadedly connected to the support shaft 91. An internal hexagonal hole is provided at the center of the end portion of the adjusting stud 92. By means of an internal angle screwdriver, the adjusting stud 92 can be rotated to cause the adjusting stud 92 to axially displace inside the support shaft 91. When the adjusting stud 92 is screwed in, the head end of the adjusting stud 92 presses against the partition 82 of the connecting sleeve 8 fixedly connected to the worm 3, causing the connecting sleeve 8 and the worm 3 to synchronously displace towards the connecting seat 7 and compress the spring 73. When the adjusting stud 92 is screwed out, the elastic potential energy of the spring 73 is released to push the connecting sleeve 8 and the worm 3 towards the adjusting assembly 9 from the connecting seat 7. In this way, the clearance between the engagement of the worm gear and the worm can be conveniently adjusted.

[0026] The end cap 93 is sleeved on the end portion of the support shaft 91 to seal the tail end of the support shaft 91. During implementation, the end cap 93 is threadedly connected to the support shaft 91. The setting of the end cap 93 can play a role in preventing oil leakage and dust.

[0027] To ensure the covering of the end cap 93, in this embodiment, the length of the adjusting stud 92 is not greater than the length of the support shaft 91.

[0028] Through this technical solution, by providing a compression spring at the head end of the worm and an extrusion member support shaft and an adjusting stud at the tail end of the worm, the worm can be displaced axially relative to the worm gear by screwing in or out the adjusting stud, making the structure of this speed reducer not only simple but also the operation of adjusting the clearance between the engagement of the worm gear and the worm convenient.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A worm gear reducer with adjustable clearance, comprising a reduction box and a worm wheel (2), a worm (3), a large gear (4), a small gear (5) and a plurality of bearings (10) arranged in the reduction box, wherein the worm (3) and the large gear (4) are coaxially arranged, and characterized in that: The reducer further comprises a connecting seat (7) and an adjusting assembly (9) which are coaxially arranged; the connecting seat (7) is between the worm (3) and the gear (4), wherein the connecting seat (7) is fixedly connected to the gear (4) and is axially slidably connected to the head end of the worm (3); a spring is provided in the connecting seat (7), and the worm (3) is crimped to the spring; the adjusting assembly (9) comprises a supporting shaft (91) and an adjusting stud (92); the supporting shaft (91) is penetratingly arranged on the reducer through a bearing (10), and the supporting shaft (91) is a tubular structure; the supporting shaft (91) is axially slidably connected to the tail end of the worm (3); the adjusting stud (92) is threadedly connected to the inner wall of the supporting shaft (91), and the head end of the adjusting stud (92) is crimped to the tail end of the worm (3).

2. The worm gear reducer with adjustable gap adaptation according to claim 1, characterized in that: The connecting seat (7) further comprises a chassis (71) and a sleeve (72); the sleeve (72) is coaxially fixedly connected to the chassis (71); the chassis (71) is fixedly connected to the large gear (4); the spring is arranged in the sleeve (72); and the head end of the worm (3) is axially slidably arranged in the sleeve (72).

3. The worm gear reducer with adjustable gap adaptation according to claim 2, characterized in that: The outer periphery of the head end of the worm (3) is provided with a key; the inner wall of the sleeve (72) is provided with a keyway matched with the key.

4. The worm gear reducer with adjustable gap adaptation according to claim 1, characterized in that: A connecting sleeve (8) is fixedly provided at the rear end of the worm (3); a keyway is provided in the connecting sleeve (8); and a key matching the keyway of the connecting sleeve (8) is provided on the outer periphery of the front end of the support shaft (91).

5. The worm gear reducer with adjustable gap adaptation according to claim 4, characterized in that: The connecting sleeve (8) comprises a sleeve body (81) and a partition plate (82); the partition plate (82) is arranged in the sleeve body (81); and the adjusting screw (92) is crimped to the partition plate (82).

6. The worm gear reducer with adjustable clearance adaptation according to claim 1, characterized in that: The adjustment assembly (9) further comprises an end cover (93); the end cover (93) is fixedly sleeved on the rear end of the support shaft (91).

7. The worm gear reducer with adjustable clearance adaptation according to claim 1, characterized in that: A hexagonal hole is formed at the axis of the rear end of the adjusting screw (92).

8. The worm gear reducer with adjustable clearance adaptation according to claim 6, characterized in that: The end cover (93) is connected to the support shaft (91) via threads.

9. The worm gear reducer with adjustable clearance adaptation according to claim 1, characterized in that: The length of the support shaft (91) is not less than the length of the adjustment stud (92).

10. The worm gear reducer with adjustable gap adaptation according to claim 2, characterized in that: The chassis (71) and the large gear (4) are fixedly connected by bolts.

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