CN215980532U

CN215980532U - Motor-worm coupling

Info

Publication number: CN215980532U
Application number: CN202122092606.0U
Authority: CN
Inventors: 陶喆; 高昌晟; 杜立新; 于鑫; 陆春雷; 陆烽
Original assignee: Nason Automotive Technology Hangzhou Co ltd
Current assignee: Nason Automotive Technology Hangzhou Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-03-08
Anticipated expiration: 2031-08-31

Abstract

The utility model relates to a motor-worm coupling, which comprises a worm coupling and a motor coupling, wherein a plurality of first convex teeth are arranged on the outer ring of the end surface of the worm coupling, a plurality of second convex teeth are arranged on the outer ring of the end surface of the motor coupling, the first convex teeth and the second convex teeth are arranged at equal intervals, the first convex teeth and the second convex teeth are matched and clamped at intervals to enable the worm coupling and the motor coupling to be mutually connected in a transmission way, a gap is formed between the first convex teeth and the second convex teeth, an elastic coupling is arranged in the gap and is a flexible piece used for buffering acting force between the worm coupling and the motor coupling and eliminating the gap between the first convex teeth and the second convex teeth, the worm coupling and the motor coupling are respectively provided with a shaft hole for the worm shaft and a motor rotating shaft to pass through, and a first bearing is sleeved on the position, which is close to the worm shaft, on the worm coupling, so that when a worm is machined, the length of the worm rod can be properly reduced, so that the length of the worm rod is shortened in the axial direction compared with the original length, and the space of one bearing length is saved.

Description

Motor-worm coupling

Technical Field

The utility model relates to the technical field of couplings, in particular to a motor-worm coupling.

Background

Along with the improvement of the automobile electronization degree, more and more electronic power-assisted brake systems are applied to the market.

The transmission mechanism in the electronic power-assisted braking system mostly adopts a worm gear and worm structure, most of the worms and the motor are made into a split structure, and at the moment, in the booster of the electronic power-assisted braking system, the worms and the motor rotating shaft need to be connected through a coupler.

The coupling is a device for connecting two shafts or a shaft and a rotating part, rotating together in the process of transmitting motion and power and not separating under normal conditions. Sometimes it is used as a safety device to prevent the coupled machine parts from bearing excessive load, and it plays the role of overload protection.

In the existing connection mode of the motor and the worm, a rotating shaft of the motor needs to be connected with a coupler, then a worm shaft of the worm needs to be connected with a coupler, and the motor and the worm are connected through the two couplers. In addition, bearings are required to be mounted on the rotating shaft of the motor and the worm shaft of the worm, the bearings can support the mechanical rotating body, the friction coefficient of the rotating shaft of the motor and the worm shaft in the movement process is reduced, and the rotation precision of the rotating shaft and the worm shaft is ensured. Because the worm shaft of the worm needs to be provided with a bearing, the worm shaft needs to be processed into a sufficient length, and a longer worm shaft occupies a larger space.

The foregoing description is provided for general background information and is not admitted to be prior art.

Disclosure of Invention

The utility model aims to provide a motor-worm coupling, which shortens the axial length of a worm and saves space.

The utility model provides a motor-worm coupling, which comprises a worm coupling and a motor coupling in transmission connection with the worm coupling, wherein the worm coupling and the motor coupling are respectively connected with a worm shaft and a motor rotating shaft, and a first bearing is sleeved on the worm coupling at a position close to the worm shaft.

Furthermore, a plurality of first convex teeth are arranged on the outer ring of the end face of the worm coupling, a plurality of second convex teeth are arranged on the outer ring of the end face of the motor coupling, a gap is formed between the first convex teeth and the second convex teeth, and an elastic coupling is arranged in the gap.

Further, the elastic coupling comprises a cylinder and a plurality of support legs extending outwards from the outer edge of the cylinder in the radial direction, and the support legs are arranged in a gap formed between the first convex teeth and the second convex teeth.

Further, the support legs are evenly distributed on the periphery of the cylinder.

Further, the support legs are rectangular parallelepiped.

Further, the center of the cylinder of the elastic coupling has a circular through hole.

Further, the elastic coupling is a flexible integrated piece.

Further, shaft holes are formed in the worm coupling and the motor coupling, and the worm shaft and the motor rotating shaft are inserted into the corresponding shaft holes in the worm coupling and the motor coupling respectively.

Further, the profiles of the first and second lobes are each provided with a rounded corner.

According to the motor-worm coupling, the first convex teeth of the worm coupling and the second convex teeth of the motor coupling are matched and clamped at intervals to realize mutual transmission connection, a gap is formed between the first convex teeth and the second convex teeth, and the elastic coupling is arranged in the gap. The motor rotating shaft rotates to output torque, the torque is transmitted to the elastic coupler through the motor coupler and then transmitted to the worm coupler, and therefore the worm shaft of the worm is driven to rotate. Meanwhile, a first bearing is sleeved at a position, close to the worm, on the worm coupler, and the first bearing sleeved on the worm coupler replaces a bearing originally arranged on a worm shaft of the worm, so that the length of the worm shaft can be properly reduced when the worm is machined, the length of the worm is shortened in an axial direction compared with the original length of the worm, the space of one bearing length is saved, and the structure is more compact.

Drawings

FIG. 1 is a schematic view of a motor and a worm coupled by a motor-worm coupling;

FIG. 2 is a schematic view of the assembly between the resilient coupling, the worm coupling, the first bearing and the worm;

FIG. 3 is a cross-sectional view of the worm coupling, the first bearing and the worm after connection;

FIG. 4 is a schematic view of the assembly between the motor coupling and the motor;

fig. 5 is a schematic structural view of the motor coupling.

In the figure, 1, a worm coupling; 2. a motor coupling; 3. an elastic coupling; 4. a worm shaft; 5. a motor shaft; 6. a shaft hole; 7. a first bearing; 8. rounding off; 9. a motor; 10. a worm; 11. a first lobe; 21. a second lobe; 31. a cylinder; 32. a support leg; 311. and a through hole.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

Referring to fig. 1-5, a motor-worm coupling includes a worm coupling 1, a motor coupling 2, and an elastic coupling 3, where the worm coupling 1 and the motor coupling 2 are respectively provided with a worm shaft 4 for a worm 10 and a shaft hole 6 for a motor shaft 5 of a motor 9 to pass through, the worm coupling 1 and the motor coupling 2 are connected in a transmission manner, and the elastic coupling 3 is installed in a connection cavity formed between the worm coupling 1 and the motor coupling 2. The elastic coupling 3 is used for buffering acting force between the worm coupling 1 and the motor coupling 2, and damage of external impact force to the buffering worm coupling 1 and the motor coupling 2 is avoided. More specifically, the outer ring of the end face of the worm coupling 1 is provided with a plurality of first convex teeth 11, and the worm coupling 1 and the first convex teeth 11 are integrally formed; the outer ring of the end face of the motor coupling 2 is provided with a plurality of second convex teeth 21, and the motor coupling 2 and the second convex teeth 21 are integrally formed. In this embodiment, the number of the first convex teeth 11 and the number of the second convex teeth 21 are four, and the four first convex teeth 11 and the four second convex teeth 21 are arranged at equal intervals, when the worm coupling 1 is engaged with the motor coupling 2, a gap is formed between the adjacent first convex teeth 11 and the adjacent second convex teeth 21, and the elastic coupling 3 is arranged in the gap.

Referring to fig. 1 and 2, the elastic coupling 3 is a flexible integral member, which includes a cylinder 31 and a plurality of legs 32 extending radially outward from the outer edge of the cylinder 31, and the legs 32 are uniformly distributed on the outer periphery of the cylinder 31. The cylinder 31 of the elastic coupling 3 has a circular through hole 311 in the center. The central circular through hole 311 can reduce the weight of the elastic coupling 3, save materials, reduce cost, and ensure that the elastic coupling has an inward deformation space when stressed. In the present embodiment, the supporting legs 32 are quadrangular prism-shaped, such as rectangular parallelepiped-shaped. A total of eight support legs 32 are provided on the elastic coupling 3, and one support leg 32 is provided in the gap between the adjacent first convex tooth 11 and the adjacent second convex tooth 21. A groove is formed between the adjacent support legs 32, the elastic coupling 3 is arranged in the worm coupling 1 in the assembling process, four first convex teeth 11 on the end surface of the worm coupling 1 respectively occupy four grooves in the elastic coupling 3, and then four second convex teeth 21 on the end surface of the motor coupling 2 are inserted into the remaining four grooves of the elastic coupling 3, so that the worm coupling 1 and the motor coupling 2 can be matched and clamped. When the motor rotating shaft 5 rotates to output torque, the torque is transmitted to the elastic coupling 3 through the motor coupling 2 and then transmitted to the worm coupling 1, so that the worm shaft 4 of the worm 10 is driven to rotate.

Referring to fig. 2, 3 and 5, the top edges of first tooth 11 and second tooth 21 are rounded 8. The first teeth 11 and the second teeth 21 are liable to cause abrasion of the legs 32 if there is a sharp corner, since they are in direct contact with the legs 32 of the resilient coupling 3.

Referring to fig. 1-3, a first bearing 7 is sleeved on the worm coupling 1 at a position close to the worm 10. More specifically, the worm coupling 1 is provided with a step, and the first bearing 7 is provided on the step and abuts against one end of the worm shaft 4. In this embodiment, the first bearing 7 sleeved on the worm coupling 1 replaces the bearing originally arranged on the worm shaft 4 of the worm 10, so that when the worm 10 is machined, the length of the worm 10 can be properly reduced, the length of the worm 10 in the axial direction is shortened, the space of one bearing length is saved, and the structure is more compact. Meanwhile, when the bearing is arranged on the worm shaft 4 of the

worm

10, 2 places on the worm shaft 4 need to be turned (namely, a contact part between the worm shaft 4 and the worm coupling 1 and a contact part between the worm shaft 4 and the bearing), in the embodiment, the first bearing 7 is arranged on the worm coupling 1, so that only 1 place on the worm shaft 4 needs to be turned (namely, a contact part between the worm shaft 4 and the worm coupling 1), and 1 place on the worm coupling 1 needs to be turned (namely, a contact part between the worm coupling 1 and the first bearing 7). A second bearing (not shown) is sleeved on the motor rotating shaft 5 at a position close to the motor coupling 2. The second bearing (not shown) may guide the rotation of the motor shaft 5, and may also receive a part idling on the motor shaft 5, so that the motor shaft 5 may smoothly rotate. In the present embodiment, the first bearing 7 and the second bearing (not shown) are both rolling bearings.

To sum up, the first convex tooth 11 of the worm coupling 1 of the motor-worm coupling and the second convex tooth 21 of the motor coupling 2 of the application are matched with each other to realize transmission connection with each other at intervals, a gap is formed between the first convex tooth 11 and the second convex tooth 21, and an elastic coupling 3 is arranged in the gap. The motor shaft 5 rotates to output torque, the torque is transmitted to the elastic coupling 3 through the motor coupling 2 and then transmitted to the worm coupling 1, and therefore the worm shaft 4 of the worm 10 is driven to rotate. Meanwhile, the first bearing 7 is sleeved at a position, close to the worm 10, on the worm coupler 1, and the first bearing 7 sleeved on the worm coupler 1 replaces a bearing originally arranged on the worm shaft 4 of the worm 10, so that when the worm 10 is machined, the length of the worm 10 can be properly reduced, the length of the worm 10 is shortened in an axial direction compared with the original length of the worm 10, the space of one bearing length is saved, and the structure is more compact.

In this document, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.

As used herein, the ordinal adjectives "first", "second", "third", etc., used to describe an element are merely to distinguish between similar elements, and do not imply that the elements so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the purpose of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A motor-worm coupling characterized by: including worm shaft coupling (1) and with motor coupling (2) that worm shaft coupling (1) transmission is connected, worm shaft coupling (1) with motor coupling (2) are connected with worm axle (4) and motor shaft (5) respectively, be close to on worm shaft coupling (1) the position cover of worm axle (4) is equipped with first bearing (7).

2. The motor-worm coupling of claim 1, wherein: the outer lane of the terminal surface of worm shaft coupling (1) is provided with a plurality of first dogtooths (11), the outer lane of the terminal surface of motor shaft coupling (2) is provided with a plurality of second dogtooths (21), first dogtooth (11) with be formed with the clearance between second dogtooth (21), be equipped with resilient coupling (3) in the clearance.

3. The motor-worm coupling of claim 2, wherein: the elastic coupling (3) comprises a cylinder (31) and a plurality of supporting feet (32) extending outwards from the outer edge of the cylinder (31) in the radial direction, and the supporting feet (32) are arranged in a gap formed between the first convex teeth (11) and the second convex teeth (21).

4. A motor-worm coupling according to claim 3, characterized in that: the supporting feet (32) are uniformly distributed on the periphery of the cylinder (31).

5. A motor-worm coupling according to claim 3, characterized in that: the supporting legs (32) are cuboid.

6. A motor-worm coupling according to claim 3, characterized in that: the center of the cylinder (31) of the elastic coupling (3) is provided with a circular through hole (311).

7. The motor-worm coupling of claim 2, wherein: the elastic coupling (3) is a flexible integrated piece.

8. The motor-worm coupling of claim 1, wherein: worm shaft coupling (1) with all be equipped with shaft hole (6) on motor coupling (2), worm axle (4) reach motor shaft (5) insert respectively worm shaft coupling (1) with in the last corresponding shaft hole (6) of motor coupling (2).

9. The motor-worm coupling of claim 2, wherein: the profiles of the first convex teeth (11) and the second convex teeth (21) are provided with fillets (8).