CN212155688U

CN212155688U - Gear transmission overload protection device and gear transmission system

Info

Publication number: CN212155688U
Application number: CN202020566677.2U
Authority: CN
Inventors: 刘强; 李金玉
Original assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Current assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-12-15
Anticipated expiration: 2030-04-16

Abstract

The utility model belongs to the technical field of gear drive system, a gear drive overload protection device and gear drive system are disclosed. The gear transmission overload protection device comprises a torque adjusting assembly, wherein the torque adjusting assembly is arranged between a gear shaft and a gear, the safety coefficient of the torque adjusting assembly is lower than that of gear transmission, and the torque adjusting assembly is configured to be capable of adjusting the torque transmission range of a gear transmission system. The overload protection of the gear transmission system can be realized, and the damage risk of the gear transmission system is reduced; and the torque adjusting component is configured to adjust the torque transmission range of the gear transmission system, and the purpose of load variation is achieved. The utility model provides a gear drive system, including foretell gear drive overload protection device, have the overload protection function, the biography is turned round the scope and is adjustable.

Description

Gear transmission overload protection device and gear transmission system

Technical Field

The utility model relates to a gear drive technical field especially relates to a gear drive overload protection device and gear drive system.

Background

In the conventional gear transmission system, the gear 2 'and the gear shaft 1' are usually in the form of interference coupling as shown in fig. 1, key coupling as shown in fig. 2, or spline housing coupling as shown in fig. 3.

The existing connection mode has the following defects:

1. the size of the torque transmission is fixed along with the existing structure, and the load change possibility is not realized;

2. the transmission system does not have overload protection capability, and the transmission system can be irreversibly damaged after instantaneous overload.

Therefore, it is desirable to provide a gear overload protection device and a gear transmission system to solve the above problems in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gear drive overload protection device and gear drive system, this gear drive system's load is variable, and easy installation is maintained, and has the overload protection function.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a gear drive overload protection device, sets up between gear shaft and gear, gear drive overload protection device includes the torque adjustment subassembly, the torque adjustment subassembly sets up the gear shaft with between the gear, the factor of safety of torque adjustment subassembly is less than gear drive's factor of safety, the torque adjustment subassembly is configured to the biography that can adjust gear drive system and turns round the scope.

As the gear transmission overload protection device, the torque adjusting assembly comprises an adjusting assembly and a friction ring, the friction ring is arranged between the gear shaft and the gear, the adjusting assembly penetrates through the friction ring along the axial direction of the gear shaft, and the pre-tightening torque of the adjusting assembly is adjustable.

As the gear transmission overload protection device, the number of the adjusting assemblies is multiple, and the adjusting assemblies are uniformly distributed along the circumferential circumference of the friction ring.

As the gear transmission overload protection device, the adjusting assembly comprises a torque adjusting bolt and an adjusting nut matched with the torque adjusting bolt for use.

As the gear transmission overload protection device, the cross section of the friction ring is conical.

As the gear transmission overload protection device, the number of the friction rings is one, and two end faces of each friction ring are respectively flush with two end faces of the gear; or

The friction rings are symmetrically arranged, small ends are opposite and arranged at intervals, and large ends are flush with the end faces of the gears.

As the gear transmission overload protection device, the friction ring is made of steel, aluminum alloy and plastic.

As the above-mentioned gear transmission overload protection device, the gear transmission overload protection device further includes:

the torque transmission inner bushing is sleeved on the peripheral surface of the gear shaft;

the overload protection outer bushing is arranged on the inner circumferential surface of the gear;

the torque adjusting assembly is arranged between the torque transmission inner bushing and the overload protection outer bushing.

As the gear transmission overload protection device, the torque transmission inner bushing is in clearance fit with the gear shaft, and the overload protection outer bushing is in clearance fit with the gear.

A gear transmission system comprising a gear transmission overload protection apparatus as claimed in any one of the preceding claims.

Compared with the prior art, the utility model discloses an advantage and beneficial effect lie in:

compared with the prior art, the gear transmission overload protection device provided by the utility model comprises a torque adjusting component, wherein the torque adjusting component is arranged between a gear shaft and a gear, the safety coefficient of the torque adjusting component is set to be lower than that of gear transmission, the overload protection of a gear transmission system can be realized, and the damage risk of the gear transmission system is reduced; and the torque adjusting component is configured to adjust the torque transmission range of the gear transmission system, and the purpose of load variation is achieved.

The utility model provides a gear drive system, including foretell gear drive overload protection device, have the overload protection function, the biography is turned round the scope and is adjustable.

Drawings

FIG. 1 is a cross-sectional view of a gear system as provided by the prior art;

FIG. 2 is a cross-sectional view of another prior art gear system;

FIG. 3 is a cross-sectional view of yet another prior art gear system;

fig. 4 is a cross-sectional view of a gear system according to an embodiment of the present invention.

The figures are labeled as follows:

1', a gear shaft; 2', a gear;

1. a gear shaft; 2. a gear; 3. a torque adjustment assembly; 4. a torque transmission inner bushing; 5. an overload protection outer liner;

31. a friction ring; 32. a torque adjusting bolt; 33. and adjusting the nut.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly but via another feature. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 4, the present embodiment discloses a gear transmission system, which includes a gear 2 and a gear shaft 1, wherein a gear transmission overload protection device is disposed between the gear shaft 1 and the gear 2, and the gear transmission system is provided with the overload protection device, so that an overload protection function can be realized, the damage risk of the gear transmission system can be reduced, the torque transmission range of the gear transmission system can be adjusted, and the purpose of variable load can be realized.

The gear drive overload protection device that this embodiment provided mainly includes torque adjusting component 3, and torque adjusting component 3 sets up between gear shaft 1 and gear 2, and torque adjusting component 3's factor of safety is less than gear drive's factor of safety to make gear drive system have overload protection ability, avoid instantaneous overload back transmission system to take place irreversible damage. The torque adjustment assembly 3 is configured to be able to adjust the torque transmission range of the gear transmission system such that the gear transmission system achieves the purpose of load variability.

Specifically, the torque adjusting assembly 3 includes an adjusting assembly and a friction ring 31, the friction ring 31 is disposed between the gear shaft 1 and the gear 2, the adjusting assembly is axially inserted into the friction ring 31 along the gear shaft 1, and a pre-tightening torque of the adjusting assembly is adjustable. Along with the adjustment of the pre-tightening torque, the range of the transmission torque of the gear transmission system can be adjusted.

Further, the quantity of adjusting part is a plurality of, and a plurality of adjusting part along the circumference equipartition setting of friction ring 31. By adjusting the number of adjustment assemblies, a change in torque transmission capability can be achieved.

Furthermore, the adjusting assembly comprises a torque adjusting bolt 32 and an adjusting nut 33 matched with the torque adjusting bolt 32, and the purpose of changing the torque transmission capacity of the gear transmission system is achieved by changing the pre-tightening torque of the adjusting nut 33 and the torque adjusting bolt 32.

For better realizing the pretightening force adjustment of the adjusting component, the section of the friction ring 31 is conical, compared with a common ring structure, the ring structure with the conical section is more convenient for adjusting the pretightening force moment of the adjusting component, and the adjusting range is large.

Alternatively, the number of the friction rings 31 may be one or two, and when the friction rings 31 are arranged in one, the large end surface and the small end surface of the friction ring 31 are respectively flush with the two end surfaces of the gear 2, so that the adjustment assembly is convenient to arrange; when the number of friction ring 31 sets up to two, two friction ring 31 symmetry settings, the tip is relative and the interval sets up, and the main aspects flushes with the terminal surface of gear 2, is convenient for set up adjusting part. Two friction rings 31 are preferably provided in this embodiment.

In the present embodiment, the material of the friction ring 31 includes steel, aluminum alloy and plastic. The friction ring 31 is made of different materials, so that the torque transmission range of the gear transmission system is different. Specifically, when the friction ring 31 is made of steel, the torque transmission range is maximized; when the friction ring 31 is made of an aluminum alloy, the torque transmission range is inferior; when the friction ring 31 is made of plastic, the torque transmission range is minimized. In practical application, the material of the friction ring 31 may be selected according to specific working conditions, and the embodiment is not particularly limited.

In this embodiment, by setting the safety factor of the torque adjusting bolt 32 and the friction ring 31 to be lower than the safety factor of the gear transmission, the overload protection function of the gear transmission system can be realized, and the gear transmission system is prevented from being irreversibly damaged after instantaneous overload.

Furthermore, the gear transmission overload protection device in this embodiment further includes a torque transmission inner bushing 4 and an overload protection outer bushing 5, the torque transmission inner bushing 4 is sleeved on the outer peripheral surface of the gear shaft 1, the overload protection outer bushing 5 is arranged on the inner peripheral surface of the gear 2, and the torque adjusting assembly 3 is arranged between the torque transmission inner bushing 4 and the overload protection outer bushing 5. Under this structure setting, more preferably, adopt clearance fit when the outer peripheral face of pass and turn round inner bush 4 and gear shaft 1, the inner peripheral face of overload protection outer bush 5 and gear 2 installs, compare several kinds of assembly methods among the prior art, above-mentioned structure simple structure is reliable, can realize simple and easy dismouting and maintain, reduces the machining precision requirement to the installation face simultaneously to reduce the processing degree of difficulty and cost, can also reduce because of the possibility of disconnected axle, disconnected tooth that processing stress concentration produced.

Furthermore, the overload protection outer bushing 5 is a stepped bushing member, which can increase the friction area with the gear 2, thereby improving the friction force and the torque transmission capability of the gear transmission system.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a gear drive overload protection device, sets up between gear shaft (1) and gear (2), its characterized in that, gear drive overload protection device includes torque adjustment subassembly (3), torque adjustment subassembly (3) set up gear shaft (1) with between gear (2), the factor of safety of torque adjustment subassembly (3) is less than gear drive's factor of safety, torque adjustment subassembly (3) are configured as the biography of adjusting gear transmission system and turn round the scope.

2. The gear transmission overload protection device according to claim 1, wherein the torque adjusting assembly (3) comprises an adjusting assembly and a friction ring (31), the friction ring (31) is arranged between the gear shaft (1) and the gear (2), the adjusting assembly is arranged in the friction ring (31) in the axial direction of the gear shaft (1) in a penetrating manner, and the pre-tightening torque of the adjusting assembly is adjustable.

3. The gear transmission overload protection device according to claim 2, wherein the number of the adjusting assemblies is multiple, and the adjusting assemblies are uniformly distributed along the circumferential circumference of the friction ring (31).

4. Gear transmission overload protection according to claim 2, characterised in that the adjustment assembly comprises a torque adjustment bolt (32) and an adjustment nut (33) cooperating with the torque adjustment bolt (32).

5. A gear transmission overload protection apparatus according to any one of claims 2 to 4, characterised in that the cross-sectional shape of the friction ring (31) is conical.

6. The gear transmission overload protection device according to claim 5, wherein the number of the friction rings (31) is one, and two end faces of each friction ring (31) are flush with two end faces of the gear (2); or

The number of friction ring (31) is two, two friction ring (31) symmetry sets up, and the tip is relative and the interval sets up, the main aspects with the terminal surface of gear (2) flushes.

7. Gear transmission overload protection according to claim 2, characterised in that the friction ring (31) is made of steel, aluminium alloy or plastic.

8. The gear transmission overload protection apparatus of claim 1, further comprising:

a torque transmission inner bushing (4) sleeved on the outer peripheral surface of the gear shaft (1);

an overload protection outer bushing (5) provided on an inner peripheral surface of the gear (2);

the torque adjusting assembly (3) is arranged between the torque transmission inner bushing (4) and the overload protection outer bushing (5).

9. A gear transmission overload protection apparatus according to claim 8, characterised in that the torque transmission inner bushing (4) is in clearance fit with the gear shaft (1) and the overload protection outer bushing (5) is in clearance fit with the gear wheel (2).

10. A gear transmission system comprising a gear transmission overload protection apparatus according to any one of claims 1 to 9.