CN115059737A

CN115059737A - Transmission assembly and driving device

Info

Publication number: CN115059737A
Application number: CN202210665265.8A
Authority: CN
Inventors: 李树强; 孙海涛
Original assignee: Beijing Youzhuju Network Technology Co Ltd
Current assignee: Beijing Youzhuju Network Technology Co Ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2022-09-16

Abstract

The embodiment of the application provides a transmission assembly and drive arrangement, wherein, transmission assembly includes: mounting a base; the worm wheel is rotatably arranged on the mounting base; the first worm is rotatably arranged on the mounting base and meshed with the worm wheel; the second worm is rotatably arranged on the mounting base and arranged side by side with the first worm, the second worm is meshed with the worm wheel, and the worm wheel is positioned between the first worm and the second worm; the first worm and the second worm rotate reversely through the first gear set; and the supporting mechanism is connected between the second worm and the mounting base and is used for meshing the tooth part of the second worm with the tooth part of the worm wheel. The application provides a transmission assembly, in the twinkling of an eye that first worm commutates, through second worm drive worm wheel, realize the positive and negative rotation of worm wheel, improved return error in worm wheel and the worm transmission effectively, promote transmission precision, overall structure is simple, does not relate to the production of special-shaped worms such as thin slice worm, reduction in production cost.

Description

Transmission assembly and driving device

Technical Field

The application belongs to the technical field of mechanical transmission, and particularly relates to a transmission assembly and a driving device.

Background

In the related art, the return error of the process of mechanical transmission is one of the important factors affecting the transmission precision, such as: the worm gear and worm transmission mechanism has a transmission auxiliary backlash which is used for preventing the worm gear and the worm from being clamped due to errors and thermal deformation, a space is reserved for a lubricating oil film between tooth surfaces, the backlash brings idle running for the mechanism during reverse rotation, the mechanism cannot be accurately positioned, and the machining cost cannot be greatly increased and cannot be borne if only the machining precision is improved.

Disclosure of Invention

An object of the embodiment of the application is to provide a transmission assembly and a driving device, which can solve or improve the problem of return stroke error of worm wheel and worm transmission.

In a first aspect, an embodiment of the present application provides a transmission assembly, including:

mounting a base;

the worm wheel is rotatably arranged on the mounting base;

the first worm is rotatably arranged on the mounting base and meshed with the worm wheel;

the second worm is rotatably arranged on the mounting base and arranged side by side with the first worm, the second worm is meshed with the worm wheel, and the worm wheel is positioned between the first worm and the second worm;

the first worm and the second worm rotate reversely through the first gear set;

and the supporting mechanism is connected between the second worm and the mounting base and is used for meshing the tooth part of the second worm with the tooth part of the worm wheel.

In a second aspect, an embodiment of the present application provides a driving apparatus, including:

a drive member;

in the drive assembly according to the first aspect, the drive member is drivingly connected to the first worm in the drive assembly.

In an embodiment of the present application, the transmission assembly includes a mounting base, a worm wheel, a first worm and a second worm, all of which are rotatably mounted on the mounting base, and the first worm and the second worm are respectively engaged with the worm wheel on two sides of the worm wheel, wherein the first worm and the second worm are in driving connection through a first gear set, that is, the first worm can drive the second worm through the first gear set, and the rotation directions of the first worm and the second worm are opposite, and meanwhile, a support mechanism is provided between the second worm and the mounting base, and the support mechanism provides an axial force for the second worm, so that the tooth part of the second worm and the tooth part of the worm wheel are tightly abutted.

When the transmission assembly operates, the first worm is a driving worm, the first worm rotates towards the first direction and further drives the worm wheel to rotate towards the third direction, the first worm drives the second worm through the first gear set, so that the second worm rotates towards the second direction, namely, the first worm simultaneously drives the second worm and the worm wheel, the first worm drives the worm wheel, the second worm is in a follow-up state and does not drive the worm wheel, when the first worm rotates towards the second direction from the first direction, due to the existence of a return clearance between the first worm and the worm wheel, the first worm does not drive the worm wheel, but the first worm can drive the second worm to rotate towards the first direction through the first gear set, and due to the fact that tooth parts between the second worm and the worm wheel are in a state of mutual abutment through the supporting mechanism, the second worm and the worm wheel do not have a return clearance, that is, the second worm can directly drive the worm wheel to rotate towards the fourth direction, and then at the moment of reversing the first worm, the worm wheel is driven by the second worm, the second worm has a driving effect on the worm wheel, the first worm is in a follow-up state and does not drive the worm wheel, so that the forward and reverse rotation of the worm wheel is driven by different worms, the return error in the transmission of the worm wheel and the worm is effectively improved, the transmission precision is improved, the whole structure is simple, the production of special-shaped worms such as a sheet worm is not involved, and the production cost is reduced.

Drawings

FIG. 1 illustrates a schematic structural diagram of a transmission assembly according to an embodiment of the present application;

fig. 2 shows a schematic structural diagram of a drive device according to an embodiment of the present application;

FIG. 3 shows a top view of a drive arrangement according to an embodiment of the present application;

FIG. 4 shows a cross-sectional view in the direction A-A of the drive device shown in FIG. 3;

FIG. 5 shows a cross-sectional view in the direction B-B of the drive device shown in FIG. 3;

fig. 6 shows a cross-sectional view in the direction C-C of the drive device shown in fig. 3.

Fig. 1 to 6 reference numerals:

100 transmission components, 110 installation bases, 112 seat bodies, 1122 bases, 1124 bottom plates, 1126 fixing plates, 114 worm shafts, 120 worm wheels, 130 first worms, 140 second worms, 150 first gear sets, 152 first gears, 154 second gears, 160 supporting mechanisms, 162 adjusting nuts, 164 elastic members, 166 first bearings, 170 second bearings, 180 second gear sets, 182 third gears, 184 fourth gears, 192 first snap springs, 194 second snap springs, 196 third bearings, 200 driving devices and 210 driving parts.

Detailed Description

The technical solutions in the embodiments of the present application will be described below clearly with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application are capable of operation in sequences other than those illustrated or described herein, and that the terms "first," "second," etc. are generally used in a generic sense and do not limit the number of terms, e.g., a first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The transmission assembly 100 and the driving device 200 provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

As shown in fig. 1, 2 and 3, in some embodiments of the present application, there is provided a drive assembly comprising: a mounting base 110; a worm gear 120 rotatably provided on the mounting base 110; a first worm 130 rotatably provided on the mounting base 110 and engaged with the worm wheel 120; the second worm 140 is rotatably arranged on the mounting base 110 and is arranged side by side with the first worm 130, the second worm 140 is meshed with the worm wheel 120, and the worm wheel 120 is positioned between the first worm 130 and the second worm 140; the first gear set 150, the first worm 130 and the second worm 140 are reversely rotated by the first gear set 150; and a support mechanism 160 connected between the second worm 140 and the mounting base 110, the support mechanism 160 being configured to engage the teeth of the second worm 140 with the teeth of the worm wheel 120.

In the embodiment of the present application, the transmission assembly 100 includes a mounting base 110, a worm wheel 120, a first worm 130 and a second worm 140, the worm wheel 120, the first worm 130 and the second worm 140 are all rotatably mounted on the mounting base 110, and the first worm 130 and the second worm 140 are respectively meshed with the worm wheel 120 on both sides of the worm wheel 120, wherein the first worm 130 and the second worm 140 are in driving connection through a first gear set 150, that is, the first worm 130 can drive the second worm 140 through the first gear set 150, and the rotation directions of the first worm 130 and the second worm 140 are opposite, and meanwhile, a support mechanism 160 is provided between the second worm 140 and the mounting base 110, and the support mechanism 160 provides an axial force to the second worm 140, so that the teeth of the second worm 140 and the teeth of the worm wheel 120 are tightly abutted together. The direction of rotation of the teeth on the first worm 130 is the same as the direction of rotation of the teeth on the second worm 140. The first worm 130 abuts against one side of the tooth of the worm wheel 120, and the second worm 140 abuts against the other side of the tooth of the worm wheel.

When the transmission assembly 100 operates, the first worm 130 is a driving worm, the first worm 130 rotates towards the first direction, and then drives the worm wheel 120 to rotate towards the third direction, and the first worm 130 drives the second worm 140 through the first gear set 150, so that the second worm 140 rotates towards the second direction, that is, the first worm 130 drives the second worm 140 and the worm wheel 120 simultaneously, the first worm 130 drives the worm wheel 120, the second worm 140 is in a following state, and does not drive the worm wheel 120, when the first worm 130 changes from the first direction to the second direction, due to the existence of the return clearance between the first worm 130 and the worm wheel 120, the first worm 130 does not drive the worm wheel 120 first, but the first worm 130 can drive the second worm 140 to rotate towards the first direction through the first gear set 150, and due to the state that the tooth portions are formed between the second worm 140 and the worm wheel 120 through the support mechanism 160, therefore, the second worm 140 and the worm wheel 120 do not have a return clearance, that is, the second worm 140 can directly drive the worm wheel 120 to rotate in the fourth direction, and then at the moment of reversing the first worm 130, the second worm 140 drives the worm wheel 120, the second worm 140 has a driving effect on the worm wheel 120, and the first worm 130 is in a following state and does not drive the worm wheel 120 until the first worm 130 reverses again, so that forward and reverse rotation of the worm wheel 120 driven by different worms is realized, return errors in the worm wheel 120 and worm transmission are effectively improved, vibration of the transmission assembly 100 is reduced, transmission accuracy is improved, the overall structure is simple, production of special-shaped worms such as a sheet worm is not involved, and production cost is reduced. The worm gear 120 is an output part and can drive an external part to operate. The first direction and the second direction are two opposite directions, and the third direction and the fourth direction are two opposite directions.

Specifically, the support mechanism 160 is located at one end of the second worm 140, and the first gear set 150 is disposed on the other end of the second worm 140, so that the support mechanism 160 provides a thrust to the second worm 140.

The first worm 130 is provided with a third bearing 196, and the first worm 130 is mounted on the mounting base 110 through the third bearing 196, specifically, the third bearings 196 may be provided at two ends of the first worm 130 and penetrate through the mounting base 110.

As shown in fig. 1 and 3, in some embodiments of the present application, the mounting base 110 includes: a base body 112; the worm shaft 114 is disposed on the base 112, and the second worm 140 is rotatably disposed on the worm shaft 114.

In the embodiment of the present application, the mounting base 110 includes a base body 112 and a worm shaft 114 disposed on the base body 112, the second worm 140 is rotatably sleeved on the worm shaft 114, and the worm shaft 114 can radially position the second worm 140, so as to improve the matching precision between the worm wheel 120 and the second worm 140, and the second worm 140 can axially move along the worm shaft 114, so as to facilitate adjustment of the abutting relationship between the second worm 140 and the worm wheel 120, and the interaction force between the second worm 140 and the worm wheel 120.

Specifically, a mounting hole is provided on the housing 112, through which the worm shaft 114 is inserted on the housing 112, thereby facilitating the assembly of the second worm 140.

Wherein, the two ends of the worm shaft 114 are provided with bushings, and the worm shaft 114 and the base 112 are connected through the bushings.

As shown in fig. 1, 3, 4, and 5, in some embodiments of the present application, the support mechanism 160 includes: an adjusting nut 162 that is fitted around the worm shaft 114 and is screwed to the worm shaft 114, and the adjusting nut 162 is rotatable along the axial direction of the worm shaft 114; and at least one elastic member 164 fitted around the worm shaft 114 between the adjustment nut 162 and the second worm 140.

In the embodiment of the present application, the supporting mechanism 160 includes an adjusting nut 162 and at least one elastic element 164, wherein the adjusting nut 162 and the elastic element 164 are both disposed on the worm shaft 114, and the elastic element 164 is disposed between the adjusting nut 162 and the second worm 140, so that the position of the second worm 140 and the pre-tightening force of the elastic element 164 can be adjusted by turning the adjusting nut 162, thereby facilitating the installation and adjustment of the transmission assembly 100.

Moreover, the number of the elastic members 164 may be one or more, and thus, different numbers of the elastic members 164 may be adopted to achieve adjustment of a larger pretightening force range.

The number of resilient members 164 can also be adjusted at any time during operation of the apparatus to accommodate wear of components and the like.

Wherein a portion of the worm shaft 114 is provided with a screw thread, the adjustment nut 162 is screwed on the worm shaft 114, and the adjustment nut 162 is rotatable on the worm shaft 114 to change the position of the adjustment nut 162 with respect to the worm shaft 114, thereby adjusting the position of the second worm 140.

In particular, the elastic member 164 is a spring, which may be a mechanical spring, such as: a coil spring, a lap spring, etc., and the elastic member 164 may be a gas spring, etc.

The first worm 130 contacts with one side of the tooth of the worm wheel 120, the second worm 140 contacts with the other side of the tooth of the worm wheel 120, and the elastic member 164 is adjusted by the adjusting nut 162 to make the second worm wheel 120 closely contact with the other side of the tooth of the worm wheel 120. When the first worm 130 is rotated in the first direction by an external force, the rotation directions of the first worm 130 and the second worm 140 are opposite to each other through the transmission of the first gear set 150, so that when the first worm 130 drives the worm wheel 120 to rotate, the second worm 140 rotates along with the rotation of the first worm 130, and the second worm 140 and the worm wheel 120 are both driven by the first worm 130, and both can run smoothly. When the first worm 130 rotates in the second direction by an external force, a return clearance is formed between the first worm 130 and the worm wheel 120, the first worm 130 does not directly drive the worm wheel 120 to reverse, a return clearance is not formed between the second worm 140 and the worm wheel 120, and the first worm 130 drives the second worm 140 to rotate through the first gear set 150, so that the second worm 140 can be used as a driving output to push the worm wheel 120 to rotate at the moment that the first worm 130 reverses, and the first worm 130 is in a follow-up state after reversing and does not drive the worm wheel 120. Therefore, return stroke errors caused by back clearances of meshing of the worm wheel 120 and the worm at the moment of reversing are improved, vibration of the transmission assembly 100 is reduced, and operation precision of the transmission assembly 100 is improved.

As shown in fig. 1, 3, 4, and 5, in some embodiments of the present application, the support mechanism 160 further comprises: the first bearing 166 is disposed on the worm shaft 114 and located between one end of the second worm 140 and the elastic member 164.

In the embodiment of the present application, the support mechanism 160 further includes a first bearing 166 disposed on the worm shaft 114, the first bearing 166 is disposed between the second worm 140 and the elastic member 164, and the elastic member 164 applies a force to the second worm 140 through the first bearing 166, so as to reduce friction force applied to the rotation of the second worm 140, improve the running stability of the second worm 140, and reduce the wear of the second worm 140.

Specifically, the worm shaft 114 is fitted with the second worm 140, the first bearing 166, the elastic member 164, and the adjustment nut 162 in this order.

The first bearing 166 is a thrust bearing. The stationary ring of the first bearing 166 is connected with the second worm 140 in a transition fit or interference fit manner, the moving ring of the first bearing 166 is connected with the mounting base 110, and rolling bodies are arranged between the stationary ring and the moving ring.

As shown in fig. 2, 4, 5, and 6, in some embodiments of the present application, base 1122: a bottom plate 1124 disposed on the base 1122, and the worm gear 120 passing through the bottom plate 1124; a fixing plate 1126 disposed on a side of the bottom plate 1124 facing away from the seat 112, the first worm 130 and the second worm 140 being disposed on the fixing plate 1126; the worm wheel 120 is rotatably disposed on the base 1122, the bottom plate 1124 or the fixed plate 1126.

In the embodiment of the present application, the seat body 112 includes a base 1122, a bottom plate 1124 and a fixed plate 1126, the bottom plate 1124 is fixed on the base 1122, the fixed plate 1126 is fixed on the bottom plate 1124, and then the base 1122 facilitates the placement of the transmission assembly 100, so that the transmission assembly 100 is more stable, and the bottom plate 1124 can increase the area of the table top, thereby facilitating the installation of the fixed plate 1126, and the fixed plate 1126 is installed on the bottom plate 1124.

The fixing plate 1126 is of a cylindrical structure, the cylindrical structure is hollow to form an installation cavity, the worm shaft 114 is arranged on the fixing plate 1126 and penetrates through the installation cavity, the first worm 130 is arranged on the fixing plate 1126 and penetrates through the installation cavity, and at least part of the worm wheel 120 is arranged in the installation cavity, so that the fixing plate 1126 can be used for containing the first worm 130, the second worm 140, the worm wheel 120 and the supporting mechanism 160, the operation stability of the transmission assembly 100 is improved, specifically, a cover body can be arranged on the fixing plate 1126, and the installation cavity is sealed by the cover body.

Specifically, the fixing plate 1126 and the base plate 1124 are connected by bolts.

As shown in fig. 1, 2 and 3, in some embodiments of the present application, the first gear set 150 includes: a first gear 152 provided to the first worm 130; the second gear 154 is provided on the second worm 140 and is engaged with the first gear 152.

In the embodiment of the present application, the first gear set 150 includes the first gear 152 and the second gear 154, the first gear 152 is mounted on the first worm 130, the second gear 154 is mounted on the second worm 140, and the first gear 152 and the second gear 154 are engaged with each other, so that the transmission error can be reduced due to only two gears, and the improvement effect on the return error can be ensured.

Wherein the first gear 152 and the second gear 154 may be spur gears or helical gears.

Specifically, the first gear 152 is secured to the first worm 130 by a first snap spring 192, and the second gear 154 is secured to the second worm 140 by a second snap spring 194.

Further, the first gear 152 and the first worm 130 are in an interference fit, so that the stability of the connection between the first gear 152 and the first worm 130 is improved, and the second gear 154 and the second worm 140 are in an interference fit, so that the stability of the connection between the second gear 154 and the second worm 140 is improved, so that the return error between the first gear 152 and the first worm 130 is improved, the return error between the second gear 154 and the second worm 140 is improved, and the rotation error of the whole transmission assembly 100 is improved.

As shown in fig. 1, 3, 4 and 5, in some embodiments of the present application, the method further includes: and a second bearing 170 fitted around the worm shaft 114 and located between the other end of the second worm 140 and the mounting base 110.

In the embodiment of the present application, the transmission assembly 100 further includes a second bearing 170 disposed on the worm shaft 114 and located between the second worm 140 and the mounting base 110, so as to reduce friction when the second worm 140 rotates, reduce wear of the second worm 140, and prolong the service life of the second worm 140. The worm shaft 114 is sequentially sleeved with a second bearing 170, a second worm 140 and a support mechanism 160, specifically, one end of the second bearing 170 abuts against the mounting base 110, the other end abuts against the second worm 140, one end of the second worm 140 abuts against the second bearing 170, the other end of the second worm 140 abuts against the first bearing 166, one end of the first bearing 166 abuts against the second worm 140, the other end of the first bearing 166 abuts against the elastic member 164, one end of the elastic member 164 abuts against the first bearing 166, and the other end of the elastic member 164 abuts against the adjusting nut 162.

Wherein the second bearing 170 is a thrust bearing. The stationary ring of the second bearing 170 is connected with the second worm 140, the stationary ring and the second worm are in transition fit or interference fit, the moving ring of the second bearing 170 is connected with the mounting base 110, and rolling bodies are arranged between the stationary ring and the moving ring.

The parts between the movable ring of the first bearing 166 and the movable ring of the second bearing 170 are integrally assembled and integrally rotate.

As shown in fig. 1, 2, 3 and 6, in some embodiments of the present application, the method further includes: and a second gear set 180 disposed on the first worm 130, wherein the first gear set 150 and the second gear set 180 are disposed on both sides of the worm wheel 120, and the second gear set 180 is used for connecting the first worm 130 and the driver 210.

In the embodiment of the present application, the transmission assembly 100 further includes a second gear set 180, the second gear set 180 is connected to the first worm 130 and is further connected to the driving member 210, and the driving member 210 can drive the first worm 130 to move through the second gear set 180, so as to facilitate changing the transmission ratio of the transmission assembly 100.

Specifically, the second gear set 180 includes a third gear 182 and a fourth gear 184, the third gear 182 is connected to the first worm 130, the fourth gear 184 is connected to the driving member 210, and the third gear 182 is engaged with the fourth gear 184.

Wherein, one end of the first worm 130 is connected with the first gear set 150, and the other end of the first worm 130 is connected with the second gear set 180, so as to reduce the interference between the first gear set 150 and the second gear set 180, improve the stability of the transmission assembly 100, and make the overall structure of the transmission assembly 100 more balanced.

In some embodiments of the present application, the transmission assembly 100 is a speed reduction assembly.

In the embodiment of the present application, the transmission assembly 100 is a speed reduction assembly, and in particular, the speed reduction assembly may be formed by setting a transmission ratio of the worm wheel 120 and the first worm 130, and a transmission ratio between the worm wheel 120 and the second worm 140, and may also be formed by setting a transmission ratio of the second gear set 180.

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, an embodiment of the present application further provides a driving apparatus 200, including: a driver 210; as in any of the above embodiments, the driving member 210 is drivingly connected to the first worm 130 in the driving assembly 100.

In the embodiment of the present application, the driving assembly includes the driving member 210 and the transmission assembly 100 provided in any of the above embodiments, and the embodiment of the present application provides the driving device 200, and thus, the transmission assembly 100 provided in any of the above embodiments is included, so that all the advantages of the transmission assembly 100 provided in any of the above embodiments are provided, and thus, no description is provided herein.

The driving member 210 is in driving connection with the first worm 130 of the transmission assembly 100, the driving member 210 can drive the first worm 130 to move through the second gear set 180, the second gear set 180 includes a third gear 182 and a fourth gear 184, the third gear 182 is connected with the first worm 130, the driving member 210 is connected with the fourth gear 184, and the third gear 182 is meshed with the fourth gear 184, so that the driving member 210 can drive the first worm 130 to rotate through the third gear 182 and the fourth gear 184, and the rotation directions of the first worm 130, the second worm 140 and the worm wheel 120 can be changed through the forward and reverse movements of the driving member 210. Furthermore, the return stroke error can be reduced by using one driving element 210 for driving, and the structure is simple and the stability is high.

Specifically, the driving member 210 is a motor or an engine, etc. The driver 210 is mounted on the mounting base 110 by bolts, for example: the driver 210 is mounted on the fixing plate 1126 by bolts, and the output shaft of the driver 210 is connected by shaft keys and/or an adhesive.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A drive assembly, comprising:

mounting a base;

the worm wheel is rotatably arranged on the mounting base;

the second worm is rotatably arranged on the mounting base and is arranged in parallel with the first worm, the second worm is meshed with the worm wheel, and the worm wheel is positioned between the first worm and the second worm;

the first worm and the second worm rotate reversely through the first gear set;

2. The drive assembly of claim 1, wherein the mounting base comprises:

a base body;

the worm shaft is arranged on the base body, and the second worm is rotatably sleeved on the worm shaft.

3. The drive assembly of claim 2, wherein the support mechanism comprises:

the adjusting nut is sleeved on the worm shaft and is in threaded connection with the worm shaft, and the adjusting nut can rotate along the axial direction of the worm shaft;

and the elastic piece is sleeved on the worm shaft and is positioned between the adjusting nut and the second worm.

4. The drive assembly of claim 3, wherein the support mechanism further comprises:

the first bearing is sleeved on the worm shaft and is positioned between one end of the second worm and the elastic piece.

5. The drive assembly of claim 2, wherein the housing comprises:

a base;

the bottom plate is arranged on the base, and the worm wheel penetrates through the bottom plate;

the fixing plate is arranged on one side, away from the seat body, of the bottom plate, and the first worm and the second worm are arranged on the fixing plate;

wherein the worm wheel is rotatably disposed on the base, the bottom plate, or the fixing plate.

6. The transmission assembly of any one of claims 1 to 5, wherein the first gear set comprises:

the first gear is arranged on the first worm;

and the second gear is arranged on the second worm and meshed with the first gear.

7. The drive assembly of any one of claims 1 to 5, further comprising:

and the second bearing is sleeved on the worm shaft and is positioned between the other end of the second worm and the mounting base.

8. The drive assembly of any one of claims 1 to 5, further comprising:

and the second gear set is arranged on the first worm, the first gear set and the second gear set are positioned on two sides of the worm wheel, and the second gear set is used for connecting the first worm and the driving piece.

9. Transmission assembly according to any of claims 1 to 5,

the transmission assembly is a speed reduction assembly.

10. A drive device, comprising:

a drive member;

the transmission assembly of any one of claims 1 to 9, the driver and a first worm in the transmission assembly being in driving connection.