CN219198058U - Transmission device and speed reducer with same - Google Patents

Abstract

The application is applicable to the field of transmission devices, and provides a transmission device and a speed reducer with the transmission device. The transmission device comprises a driving piece, a gear box, a transmission part and a connecting part arranged between the driving piece and the gear box, wherein the gear box is arranged on one side of the driving piece and made of plastic materials, and the transmission part is arranged inside the gear box and is in driving connection with the inner wall of the gear box. The connecting portion comprises a connecting seat, a penetrating through hole is formed in the connecting seat, the output end of the driving piece is rotatably penetrated in the penetrating through hole and is in driving connection with the input end of the transmission portion, and the connecting seat is in butt joint with the driving piece and is made of plastic materials different from the melt index of the gear box. The connecting part further comprises a connecting piece, the connecting piece is arranged on one side of the connecting seat and made of plastic materials of a first specification, and the connecting piece is fixedly connected with the connecting seat, welded with the gear box and fixedly connected with the driving piece. The connecting piece makes the gear box and the connecting seat realize fixed connection.

Description

Transmission device and speed reducer with same

Technical Field

The application belongs to the technical field of transmission devices, and particularly relates to a transmission device and a speed reducer with the transmission device.

Background

The existing transmission device comprises a driving piece, a gear box arranged at one side of the driving piece and a transmission part which is arranged in the gear box and meshed with the inner wall of the gear box, wherein the driving piece is a motor, and of course, a motor can also be adopted, and an output shaft of the motor penetrates through the connecting seat and is in driving connection with an input end of the transmission part so as to drive the transmission part to rotate in the gear box; in order to ensure the connection strength and the precision between the motor and the gear box, a connecting seat is usually arranged between the driving piece and the gear box, and is fixedly connected with the gear box in a laser welding mode and is fixedly connected with a shell of the motor through a bolt.

Because the gear box needs to consider the intensity of transmission tooth self on the gear box inner wall, the deformation that can take place in transmission tooth and the transmission portion transmission process and factors such as noise that produce, the connecting seat needs to consider factors such as need with high temperature motor housing contact, simultaneously in order to lighten transmission's weight and save manufacturing cost, gear box and connecting seat in current transmission often need adopt two different plastic materials to make, but two different plastic materials often melt index also are different, under this kind of circumstances, when connecting seat and gear box realize fixed connection through laser welding's mode, not only welding process can become very complicated, the connecting seat also can not realize the integration completely with the gear box simultaneously, lead to connecting seat and gear box's welding strength also lower, and then the phenomenon that gear box and connecting seat are connected insecure very easily appears.

Disclosure of Invention

An aim of the embodiment of the application is to provide a transmission device and a speed reducer with the transmission device, and aims to solve the technical problem that a connecting seat made of one plastic material and a gear box made of another plastic material are not firmly connected in the prior art.

To achieve the above object, according to one aspect of the present application, there is provided a transmission device including: the driving piece and the gear box are arranged on one side of the driving piece, and the gear box is made of plastic materials of a first specification; the transmission part is arranged inside the gear box and is in driving connection with the inner wall of the gear box; the connecting part is arranged between the driving piece and the gear box; the connecting part comprises a connecting seat, a penetrating through hole for penetrating the output end of the driving part is formed in the connecting seat, the output end of the driving part is rotatably penetrated in the penetrating through hole and is in driving connection with the input end of the transmission part, the end face of the connecting seat, which is far away from the gear box, is abutted against the outer surface of the driving part, which is close to the gear box, the connecting seat is made of a plastic material with a second specification, and the melt index of the connecting seat is different from that of the gear box; the connecting part further comprises a connecting piece, the connecting piece is arranged on one side of the connecting seat and made of plastic materials of a first specification, and the connecting piece is fixedly connected with the connecting seat, welded with the gear box and fixedly connected with the driving piece.

Optionally, the connecting piece comprises a connecting body, the connecting body is sleeved on the periphery of the connecting seat, and the inner wall of the connecting body is attached to the outer wall of the connecting seat; the connecting device comprises a connecting body, a connecting seat, a gear box, a connecting convex part, a driving part, a connecting convex part, a first connecting structure, a second connecting structure, a first connecting structure and a second connecting structure, wherein the first connecting structure is arranged on the inner wall of the connecting body; the outer wall of the connecting convex part, which is arranged adjacent to the first outer wall, is a second outer wall and a third outer wall, the second outer wall is attached to the first inner wall of the connecting concave part, and the third outer wall is attached to the second inner wall of the connecting concave part, which is arranged opposite to the first inner wall, so that the power of the input end of the driving part is transmitted to the input end of the transmission part.

Optionally, the first connection structure is a clamping column, and the second connection structure is a clamping groove.

Optionally, the joint post includes connecting portion and enhancement part, and connecting portion fixed connection is on the inner wall of linking body, and enhancement part fixed connection is kept away from the one side of linking body at connecting portion, and the projection of enhancement part projection onto linking body inner wall covers the projection of connecting portion projection onto linking body inner wall at least partially.

Optionally, the plurality of clamping columns are arranged on the inner wall of the connecting body at intervals in the direction from the driving piece to the gear box; the quantity of joint groove is unanimous with the quantity of joint post, and a plurality of joint grooves are from the direction interval setting of driving piece to gear box on the outer wall of connecting seat, and a plurality of joint posts and a plurality of joint grooves one-to-one.

Optionally, the inner wall of the connecting body is also provided with limiting bodies, the number of the limiting bodies is one less than that of the clamping columns, and each limiting body is fixedly arranged between two adjacent clamping columns; the connecting seat is provided with first limit grooves, the number of the first limit grooves is consistent with that of the limit bodies, the limit bodies are in one-to-one correspondence, and are respectively positioned in the first limit grooves and are respectively matched with the first limit grooves; the outer wall of the limiting body is provided with a first limiting structure, the groove wall of the first limiting groove is provided with a second limiting structure, one of the first limiting structure and the second limiting structure is a limiting convex part, the other is a limiting concave part, the limiting convex part is positioned in the limiting concave part, and the limiting convex part is matched with the limiting concave part so as to prevent the connecting seat from moving towards the gear box.

Optionally, a recess is formed in the outer wall of the limiting body, and projection of the clamping post onto the outer surface of the driving piece at least partially covers projection of the limiting body onto the outer surface of the driving piece, and the recess is formed into a first limiting structure; the groove wall of the first limit groove is provided with a bump, the bump is embedded into the recess, the bump is matched with the recess, and the bump is formed into a second limit structure.

Optionally, the driving member includes a driving body, a driving shaft, and a protruding portion, a first end of the driving shaft is in driving connection with the driving body, a second end of the driving shaft is in driving connection with an input end of the transmission part, and the driving shaft is formed as an output end of the driving member; the protruding part is arranged on one side of the driving body, which is close to the gear box, is sleeved on the periphery of the driving shaft and is penetrated in the penetrating through hole, the protruding part is provided with a penetrating hole for the driving shaft to penetrate and penetrate out, the driving shaft is rotatably penetrated in the penetrating hole, the wall of the penetrating through hole is provided with a protrusion, and the outer wall of the protruding part is abutted against the outer surface of the protrusion; or a fixing screw is arranged between the connecting piece and the driving piece, penetrates through the connecting piece and into the driving piece, and is in threaded connection with the driving piece; or, the gear box and the connecting piece are both made of POM material, and the connecting seat is made of PA material.

Optionally, a mounting groove is formed in the end face, close to the driving piece, of the gear box, and the connecting portion is located in the mounting groove; the connecting part further comprises a limiting part, the limiting part is arranged on the outer wall of the connecting part, a second limiting groove is formed in the groove wall of the mounting groove, the limiting part is positioned in the second limiting groove, and the limiting part is matched with the second limiting groove; or, the connecting part further comprises a gasket, the gasket is arranged between the connecting piece and the groove bottom of the mounting groove, the end face of the gasket, which is close to the groove bottom of the mounting groove, is jointed with the groove bottom of the mounting groove, the end face of the gasket, which is far away from the groove bottom of the mounting groove, is jointed with the end face, which is far away from the driving piece, of the connecting piece, and meanwhile, the gasket is jointed with the end face, which is far away from the driving piece, of the connecting seat.

According to another aspect of the present application, there is provided a speed reducer, the speed reducer comprising an output portion and the above-mentioned transmission device, the output end of the transmission portion being drivingly connected to the output portion.

The beneficial effect of the transmission that this application provided lies in: compared with the prior art, when the transmission part is assembled with the gear box, the connecting piece is fixedly connected with the driving piece, the connecting seat is fixedly connected with the connecting piece, the output end of the driving piece is driven to pass through the penetrating hole and is in driving connection with the input end of the transmission part, and finally the connecting piece made of the same specification material is fixedly connected with the gear box in a laser welding mode. The connecting piece that sets up makes the gear box that adopts the plastic material of first specification to make can realize firm fixed connection with the connecting seat that adopts the plastic material of second specification to make, has avoided because connecting seat and gear box melt index are different, and leads to gear box and connecting seat unable complete fusion, and then leads to the not firm problem of gear box and connecting seat connection, has guaranteed the joint strength of gear box and connecting seat.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a transmission device according to an embodiment of the present application;

FIG. 2 is a schematic view of a hidden gearbox rear drive provided in an embodiment of the present application;

fig. 3 is a schematic structural view of a hidden gear box and a rear transmission device of a transmission part according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a hidden spacer, a gear box and a rear transmission device of a transmission part according to an embodiment of the present application;

FIG. 5 is a schematic partial cross-sectional view of a transmission provided in an embodiment of the present application;

FIG. 6 is a schematic structural view of a connector according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a connection seat according to an embodiment of the present application;

FIG. 8 is a cross-sectional view A-A of FIG. 6;

fig. 9 is a schematic structural diagram of the coupling base and the coupling member according to the embodiment of the present application.

Reference numerals related to the above figures are as follows:

100. a driving member; 110. a driving body; 120. a drive shaft; 130. a protruding portion; 200. a gear box; 300. a transmission part; 400. a connection part; 410. a connecting seat; 411. a protrusion; 412. a bump; 420. a linking member; 421. a joint body; 422. a clamping column; 4221. a connection portion; 4222. a reinforcing portion; 423. a limiting body; 424. reinforcing an arc plate; 430. a fixing screw; 440. a limiting piece; 450. a gasket.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. Embodiments and features of embodiments in this application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

As described in the background art, currently, the existing transmission device includes a driving element, a gear box disposed at one side of the driving element, and a transmission part installed in the gear box and meshed with an inner wall of the gear box, wherein the driving element is a motor, and certainly, a motor may also be adopted, and an output shaft of the motor passes through the connecting seat and is in driving connection with an input end of the transmission part so as to drive the transmission part to rotate in the gear box; in order to ensure the connection strength and the precision between the motor and the gear box, a connecting seat is usually arranged between the driving piece and the gear box, and is fixedly connected with the gear box in a laser welding mode and is fixedly connected with a shell of the motor through a bolt.

Because the gear box needs to consider the intensity of transmission tooth self on the gear box inner wall, the deformation that can take place in transmission tooth and the transmission portion transmission process and factors such as noise that produce, the connecting seat needs to consider factors such as need with high temperature motor housing contact, simultaneously in order to lighten transmission's weight and save manufacturing cost, gear box and connecting seat in current transmission often need adopt two different plastic materials to make, but two different plastic materials often melt index also are different, under this kind of circumstances, when connecting seat and gear box realize fixed connection through laser welding's mode, not only welding process can become very complicated, the connecting seat also can not realize the integration completely with the gear box simultaneously, lead to connecting seat and gear box's welding strength also lower, and then the phenomenon that gear box and connecting seat are connected insecure very easily appears.

Referring to fig. 1 to 5, in order to solve the above-mentioned problems, according to an aspect of the present application, an embodiment of the present application provides a transmission device including a driving member 100, a gear case 200, a transmission part 300, and a connection part 400, wherein the gear case 200 is disposed at one side of the driving member 100, the gear case 200 is made of a plastic material of a first specification, the transmission part 300 is disposed inside the gear case 200 and is in driving connection with an inner wall of the gear case 200, and the connection part 400 is disposed between the driving member 100 and the gear case 200. The connecting portion 400 includes a connecting seat 410, a through hole is formed in the connecting seat 410 for the output end of the driving member 100 to pass through, the output end of the driving member 100 rotatably passes through the through hole and is in driving connection with the input end of the transmission portion 300, the end surface of the connecting seat 410 away from the gear case 200 is abutted against the outer surface of the driving member 100, which is close to the gear case 200, of the driving member 100, the connecting seat 410 is made of a plastic material with a second specification, and the melt index of the connecting seat 410 is different from that of the gear case 200. The connecting portion 400 further includes a connecting member 420, where the connecting member 420 is disposed on one side of the connecting seat 410 and made of a plastic material with a first specification, and the connecting member 420 is fixedly connected with the connecting seat 410, welded with the gear case 200, and fixedly connected with the driving member 100.

In the embodiment of the present application, the driving member 100 employs a motor, the output shaft of the motor is formed as the output end of the driving member 100, and since the output shaft of the motor generates a large amount of heat during rotation, the area around the output shaft of the motor may become hot, and since the output shaft of the motor is disposed close to the gear box 200, the outer surface of the driving member 100 disposed close to the gear box 200 is easily changed to a high-temperature outer surface, however, in other embodiments, the driving member 100 may also employ a motor, and the output shaft of the motor is formed as the output end of the driving member 100. The transmission part 300 is a conventional planetary gear assembly, the inner wall of the gear box 200 is provided with transmission teeth meshed with the transmission part 300, the planetary teeth in the planetary gear assembly are meshed with the transmission teeth, the sun teeth in the planetary gear assembly are fixedly connected with the input end of the transmission part 300, the output end of the driving member 100 and the sun teeth by using a conventional connection mode, and a specific connection mode belongs to the common knowledge of a person skilled in the art, and will not be described in detail herein, however, in other embodiments, the transmission part 300 may be other transmission gear sets, such as a parallel gear set, and the specific structure of the transmission part 300 is determined according to actual requirements.

The gear box 200 is made of POM (polyoxymethylene) materials with high hardness, high rigidity, high wear resistance and the like, and the transmission part 300 is made of POM materials, so that the design not only ensures the strength of the gear box 200 and reduces the possibility of deformation of the gear box 200 and the transmission part 300 in the transmission process, but also weakens the noise generated by the gear box 200 and the transmission part 300 in the transmission process, provides a low-noise working environment as much as possible, and simultaneously saves the manufacturing cost of the transmission device; similarly, the connecting piece 420 is made of POM material, and the connecting piece 420 is fixedly connected with the gear box 200 by means of laser welding, although in other embodiments, the gear box 200, the transmission portion 300 and the connecting piece 420 may be made of other materials. The connecting seat 410 is made of PA66 (polyamide 66 or nylon 66) with high rigidity and high heat resistance, so that the problem that the connecting seat 410 fails due to contact between the connecting seat 410 and the high-temperature outer surface of the driving member 100 is avoided, and normal use of the connecting seat 410 is ensured.

In a specific application, when the transmission part 300 is assembled with the gear box 200, the connecting piece 420 is fixedly connected with the driving piece 100, then the connecting seat 410 is fixedly connected with the connecting piece 420, then the output end of the driving piece 100 is driven to pass through the penetrating through hole and is in driving connection with the input end of the transmission part 300, and finally the connecting piece 420 made of the same specification material is fixedly connected with the gear box 200 in a laser welding mode. The connecting piece 420 enables the gear box 200 made of the plastic material with the first specification to be firmly and fixedly connected with the connecting seat 410 made of the plastic material with the second specification, so that the problem that the gear box 200 and the connecting seat 410 cannot be completely fused due to different melt indexes of the connecting seat 410 and the gear box 200, and the connection between the gear box 200 and the connecting seat 410 is unstable is avoided.

Referring to fig. 4 and 5, the engaging member 420 in this embodiment includes an engaging body 421, the engaging body 421 is sleeved on the outer periphery of the connecting seat 410, and an inner wall of the engaging body 421 is attached to an outer wall of the connecting seat 410. The inner wall of the connecting body 421 is provided with a first connecting structure, the outer wall of the connecting seat 410 is provided with a second connecting structure, one of the first connecting structure and the second connecting structure is a connecting concave part, the other is a connecting convex part, the connecting convex part is positioned in the connecting concave part, the outer wall of the connecting convex part, which is close to the driving piece 100, is a first outer wall, and the first outer wall is attached to the inner wall of the connecting concave part, which is close to the driving piece 100, so as to prevent the connecting seat 410 from moving towards the gear box 200; the outer walls of the connecting convex part, which are arranged adjacent to the first outer wall, are a second outer wall and a third outer wall, the second outer wall is attached to the first inner wall of the connecting concave part, and the third outer wall is attached to the second inner wall of the connecting concave part, which is arranged opposite to the first inner wall, so that the power of the output end of the driving part 100 is transmitted to the input end of the transmission part 300.

In the embodiment of the present application, the through hole is coaxially disposed with the output end of the driving member 100, the connecting seat 410 is coaxially disposed with the through hole, and the connecting body 421 is coaxially disposed with the connecting seat 410. When the connecting body 421 and the connecting seat 410 are assembled, the connecting body 421 is produced first, and then the connecting seat 410 is produced in the connecting body 421 in an injection molding mode, so that the connecting seat 410 and the connecting piece 420 are conveniently manufactured, and meanwhile, the connecting convex part is conveniently embedded into the connecting concave part, so that the connecting seat 410 and the connecting body 421 are fixedly connected.

Since the outer surface of the connecting seat 410 near the driving member 100 abuts against the outer surface of the driving member 100 near the gear case 200, the connecting seat 410 will not move toward the driving member 100; since the outer wall of the connecting seat 410 is attached to the inner wall of the connecting body 421, the connecting seat 410 does not rotate in the connecting body 421 around the direction perpendicular to the output end of the driving member 100; on this basis, the problem that the connecting seat 410 rotates in the connecting body 421 around the output end of the driving piece 100 and moves towards the gear box 200 is avoided by the aid of the connecting concave and the connecting convex, and the connecting seat 410 and the connecting body 421 can be firmly and fixedly connected by the aid of the design, so that the connection strength of the gear box 200 and the driving piece 100 is guaranteed.

Of course, in other embodiments, the connecting member 420 may be disposed adjacent to the connecting seat 410, and the connecting body 421 is provided with a plurality of mounting screws penetrating through the connecting member 420 and penetrating into the connecting seat 410, where the plurality of mounting screws are sequentially spaced apart.

Referring to fig. 4, the first connection structure in this embodiment is a clamping post 422, and the second connection structure is a clamping groove. The first connection structure is a connection convex part, the second connection structure is a connection concave part, and the connection convex part is matched with the connection concave part, so that the blocking force applied to the connection seat 410 by the first connection structure is enhanced. Of course, in other embodiments, the first connection structure may be a groove, and at this time, the second connection structure is a protrusion, the first connection structure is a connection recess, the second connection structure is a connection protrusion, and the connection protrusion is adapted to the connection recess.

Referring to fig. 4, 6 and 7, as an alternative to the embodiment of the present application, the clamping post 422 includes a connection portion 4221 and a reinforcement portion 4222, the connection portion 4221 is fixedly connected to the inner wall of the adapter body 421, the reinforcement portion 4222 is fixedly connected to a side of the connection portion 4221 away from the adapter body 421, and a projection of the reinforcement portion 4222 onto the inner wall of the adapter body 421 at least partially covers a projection of the connection portion 4221 onto the inner wall of the adapter body 421.

In this alternative, the connecting portion 4221 and the reinforcing portion 4222 are integrally formed, the height of the connecting portion 4221 is equal to the height of the reinforcing portion 4222, the shape of the connecting portion 4221 is rectangular-like, the shape of the reinforcing portion 4222 is rectangular-like, the cross-sectional area of the reinforcing portion 4222 is larger than the cross-sectional area of the connecting portion 4221, and of course, in other embodiments, the cross-sectional area of the connecting portion 4221 and the cross-sectional area of the reinforcing portion 4222 may be other shapes. Under the condition that the output end of the driving member 100 rotates in the through hole, the output end of the driving member 100 applies an expansion force expanding outwards to the inner wall of the through hole along the radial direction of the through hole, so that the connecting seat 410 has a tendency of expanding outwards, the arranged reinforcing portion 4222 increases the contact area between the clamping post 422 and the connecting seat 410, so that the connecting body 421 can apply a more stable resisting and supporting function to the connecting seat 410 under the condition, and the trend of expanding outwards of the connecting seat 410 is weakened, so that the output end of the driving member 100 can rotate in the through hole stably.

Referring to fig. 4, 6 and 7, as an alternative manner in the embodiment of the present application, a plurality of clamping posts 422 are provided, and the plurality of clamping posts 422 are disposed on the inner wall of the adapter body 421 at intervals in a direction from the driving member 100 to the gear case 200; the number of the clamping grooves is consistent with that of the clamping columns 422, the plurality of clamping grooves are arranged on the outer wall of the connecting seat 410 at intervals from the driving piece 100 to the gear box 200, and the plurality of clamping columns 422 are in one-to-one correspondence with the plurality of clamping grooves.

In this alternative manner, two clamping columns 422 are provided, two clamping grooves are correspondingly provided, one clamping groove of the two clamping grooves is disposed on the end face of the connecting seat 410 close to the driving piece 100, and the other clamping groove is disposed on the end face of the connecting seat 410 close to the gear box 200, however, in other embodiments, the number of the clamping grooves and the positions of the clamping columns 422 can be set to be three, four or more, and the number of the clamping grooves and the positions of the clamping grooves are correspondingly set, so that the clamping grooves can not be disposed on the two end faces of the connecting seat 410 any more, and the specific positions can be determined according to actual requirements. The plurality of clamping posts 422 and the plurality of clamping grooves increase the connection strength between the connecting seat 410 and the connecting body 421.

Referring to fig. 6 and 7, in this alternative mode, the inner wall of the connecting body 421 is further provided with a limiting body 423, the number of the limiting bodies 423 is one less than that of the clamping posts 422, and each limiting body 423 is fixedly installed between two adjacent clamping posts 422. The connecting seat 410 is provided with first limit grooves, the number of the first limit grooves is consistent with that of the limit bodies 423, the limit bodies 423 are in one-to-one correspondence, the limit bodies 423 are respectively located in the first limit grooves, and the limit bodies 423 are respectively matched with the first limit grooves. The outer wall of the limiting body 423 is provided with a first limiting structure, the wall of the first limiting groove is provided with a second limiting structure, one of the first limiting structure and the second limiting structure is a limiting convex part, the other is a limiting concave part, the limiting convex part is positioned in the limiting concave part, and the limiting convex part is matched with the limiting concave part so as to prevent the connecting seat 410 from moving towards the gear box 200.

In this alternative, the limiting body 423 is set as one, the limiting body 423 is located between the two clamping posts 422, and the limiting body 423 and the two clamping posts 422 are integrally formed. The first limit structure and the second limit structure not only can strengthen the connection strength of the connecting seat 410 and the connecting body 421, but also can limit the connecting seat 410 in the connecting body 421, and prevent the connecting seat 410 from moving towards the gear box 200.

Referring to fig. 6 to 8, in this alternative manner, a recess is formed on the outer wall of the limiting body 423, and the projection of the clamping post 422 projected onto the outer surface of the driving member 100 at least partially covers the projection of the limiting body 423 projected onto the outer surface of the driving member 100, where the recess is formed as a first limiting structure, and the first limiting structure is a limiting recess; the groove wall of the first limiting groove is provided with a bump 412, the bump 412 is embedded into the recess, the bump 412 is matched with the recess, the bump 412 is formed into a second limiting structure, and the second limiting structure is a limiting protruding part. The area of the cross section of the limiting body 423 is smaller than that of the cross section of the clamping post 422, two lugs 412 are arranged, and the two lugs 412 are respectively integrally formed on two opposite groove walls in the first limiting groove. At this time, the longitudinal sections of the two clamping posts 422 and the one limiting body 423 are i-shaped. The provided bump 412 and recess not only can strengthen the connection strength of the connection base 410 and the adapter body 421, but also can limit the connection base 410 in the adapter body 421, preventing the connection base 410 from moving toward the gear case 200.

Of course, in other embodiments, a protruding block may be disposed on an outer wall of the limiting body 423, and a projection of the limiting body 423 projected onto the outer surface of the driving member 100 at least partially covers a projection of the clamping post 422 projected onto the outer surface of the driving member 100, where the protruding block forms a first limiting structure, and the first limiting structure is a limiting protrusion; the groove wall of the first limit groove is provided with a groove, the protruding block is embedded into the groove, the protruding block is matched with the groove, the groove is formed into a second limit structure, and the second limit structure is a limit concave part.

Referring to fig. 4, 6 and 7, as an alternative manner in the embodiment of the present application, a plurality of clamping columns 422 are provided, a plurality of clamping columns 422 are disposed on the inner wall of the connecting body 421 along the circumferential interval of the connecting body 421, the number of clamping grooves is consistent with the number of clamping columns 422, and a plurality of clamping grooves are disposed on the outer wall of the connecting seat 410 along the circumferential interval of the connecting seat 410. The design strengthens the connection strength between the connector base 410 and the connector body 421.

In addition, in the embodiment, two clamping columns 422 from the driving part 100 to the gear box 200 are arranged on the outer wall of the connecting body 421, a limiting body 423 is arranged between the two clamping columns 422, the longitudinal sections of the two clamping columns 422 and the limiting body 423 are I-shaped, and a plurality of clamping columns 422 are arranged on the outer wall of the connecting body 421 along the circumference of the connecting body 421 at intervals.

Referring to fig. 5 and 9, the driving member 100 in this example includes a driving body 110, a driving shaft 120, and a protruding portion 130, wherein a first end of the driving shaft 120 is drivingly connected to the driving body 110, a second end is drivingly connected to an input end of the transmission part 300, and the driving shaft 120 is formed as an output end of the driving member 100; the protruding portion 130 is disposed on a side of the driving body 110 near the gear case 200, and is sleeved on the outer periphery of the driving shaft 120, and is disposed in the through hole in a penetrating manner, an exit hole through which the driving shaft 120 passes is disposed on the protruding portion 130, the driving shaft 120 rotatably passes through the exit hole, a protrusion 411 is disposed on a hole wall of the through hole, and an outer wall of the protruding portion 130 abuts against an outer surface of the protrusion 411.

In the embodiment of the present application, the protruding portion 130 is coaxially disposed with the driving shaft 120, the through hole is coaxially disposed with the driving shaft 120, the driving shaft 120 and the driving body 110 are connected by a conventional connection manner, so that the driving shaft 120 rotates, and the protruding portion 130 is integrally formed and manufactured on the end surface of the driving body 110 close to the gear case 200. In addition, a bearing is provided in the protruding portion 130, the bearing is sleeved on the outer circumference of the driving shaft 120, and is fixedly connected with the inner wall of the protruding portion 130, and the driving shaft 120 is rotatably provided in the bearing. In addition, the length direction of the protrusion 411 is parallel to the extending direction of the through hole, the protrusions 411 are provided with a plurality of protrusions 411, the protrusions 411 are uniformly arranged on the wall of the through hole at intervals along the circumferential direction of the through hole, the outer surfaces of the protrusions 411 are abutted against the outer surfaces of the protruding portions 130, so that the protruding portions 130 are in interference fit with the connecting base 410, the stability of connection between the driving piece 100 and the connecting base 410 is guaranteed, and the difficulty in assembling the protruding portions 130 and the connecting base 410 is reduced.

Referring to fig. 4 and 6, a fixing screw 430 is disposed between the engaging member 420 and the driving member 100 in the present embodiment, and the fixing screw 430 passes through the engaging member 420 and penetrates into the driving member 100 and is in threaded connection with the driving member 100. The fixing screw 430 passes through the engagement body 421 and penetrates into the driving member 100, and is in threaded connection with the driving member 100; the two fixing screws 430 are provided, and the two fixing screws 430 are disposed opposite to each other centering on the axis of the driving shaft 120. The two set screws 430 are provided to facilitate assembly of the coupling seat 410 and the driving member 100.

Referring to fig. 6, in the present embodiment, two reinforcing arc plates 424 are disposed on the inner wall of the adapter body 421, the two reinforcing arc plates 424 are disposed on the inner wall of the adapter body 421 opposite to each other with the axis of the driving shaft 120 as the center, and the two fixing screws 430 and the two reinforcing arc plates 424 are collinear. The reinforced arc plates 424 further increase the contact area between the adapter body 421 and the connecting seat 410, further weaken the outward expansion trend of the connecting seat 410, and ensure that the driving shaft 120 can rotate stably in the through hole in the connecting seat 410.

Referring to fig. 5, in this embodiment, the end face of the gear case 200, which is close to the driving member 100, is provided with a mounting groove, and the connecting portion 400 is located in the mounting groove, so that the design is not only beneficial to protecting the connecting portion 400, but also reduces the volume of the whole transmission device.

Referring to fig. 5 and 6, as an alternative manner in the embodiment of the present application, the connection portion 400 further includes a limiting member 440, the limiting member 440 is disposed on an outer wall of the connecting member 420, a second limiting groove is disposed on a groove wall of the mounting groove, the limiting member 440 is located in the second limiting groove, and the limiting member 440 is adapted to the second limiting groove.

In this alternative manner, the limiting member 440 is a square limiting plate, and the square limiting plate is integrally formed and manufactured on the outer wall of the connecting body 421, and is welded to the groove wall of the second limiting groove by means of laser welding, which may be other shapes of the limiting member 440 in other embodiments. The number of the limiting members 440 is four, the four limiting members 440 are uniformly spaced along the circumference of the connecting body 421 on the outer wall of the connecting body 421, and the corresponding second limiting grooves are four, which can be other numbers of limiting members 440 in other embodiments. The stopper 440 is provided to block the movement of the adapter body 421 toward the inside of the gear case 200, so that the adapter body 421 can stably stay in the installation groove.

Referring to fig. 3 and 5, as an alternative manner in the embodiment of the present application, the connection part 400 further includes a spacer 450, the spacer 450 is disposed between the engagement member 420 and the bottom of the mounting groove, the end surface of the spacer 450 near the bottom of the mounting groove is attached to the bottom of the mounting groove, and the end surface of the spacer 450 far from the bottom of the mounting groove is attached to the end surface of the engagement member 420 far from the driving member 100, and is attached to the end surface of the connection seat 410 far from the driving member 100. The spacer 450 prevents the adapter body 421 and the connector block 410 from directly contacting and colliding with the bottom of the mounting groove, and ensures the integrity of the adapter body 421 and the connector block 410.

Referring to fig. 1, according to another aspect of the present application, an embodiment of the present application provides a speed reducer, where the speed reducer includes an output portion and the above-mentioned transmission device, and an output end of the transmission portion 300 is drivingly connected to the output portion. In the embodiment of the application, the output part is an output shaft, the output end of the transmission part 300 is an output gear in the planetary gear assembly, and the output shaft and the output gear are fixedly connected in a conventional connection mode; after the power generated at the output end of the driving member 100 is transmitted to the output shaft through the transmission part 300, the power is weakened, thereby achieving a deceleration effect.

In summary, implementing the transmission device and the speed reducer with the transmission device provided by the embodiment has at least the following beneficial technical effects: when the transmission part 300 is assembled with the gear box 200, the connecting piece 420 is fixedly connected with the driving piece 100, the connecting seat 410 is fixedly connected with the connecting piece 420, the output end of the driving piece 100 is driven to pass through the penetrating through hole and is in driving connection with the input end of the transmission part 300, and finally the connecting piece 420 made of the same specification material is fixedly connected with the gear box 200 in a laser welding mode. The connecting piece 420 enables the gear box 200 made of the plastic material with the first specification to be firmly and fixedly connected with the connecting seat 410 made of the plastic material with the second specification, so that the problem that the gear box 200 and the connecting seat 410 cannot be completely fused due to different melt indexes of the connecting seat 410 and the gear box 200, and the connection between the gear box 200 and the connecting seat 410 is unstable is avoided. The joint 420 ensures the strength of the gear case 200, reduces the possibility of deformation of the gear case 200 and the transmission part 300 during transmission, reduces noise generated by the gear case 200 and the transmission part 300 during transmission, and provides a low-noise working environment as much as possible. The connecting seat 410 prevents the problem that the connecting seat 410 fails due to the contact of the connecting seat 410 with the high-temperature outer surface of the driving member 100, and ensures the normal use of the connecting seat 410.

The foregoing description of the preferred embodiment of the present utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (10)

1. A transmission, the transmission comprising:

the device comprises a driving piece (100) and a gear box (200), wherein the gear box (200) is arranged on one side of the driving piece (100), and the gear box (200) is made of a plastic material with a first specification;

the transmission part (300) is arranged inside the gear box (200) and is in driving connection with the inner wall of the gear box (200); the method comprises the steps of,

a connection portion (400), the connection portion (400) being provided between the driving element (100) and the gear box (200);

the connecting part (400) comprises a connecting seat (410), a penetrating through hole for penetrating the output end of the driving part (100) is formed in the connecting seat (410), the output end of the driving part (100) is rotatably penetrated in the penetrating through hole and is in driving connection with the input end of the transmission part (300), the end face, far away from the gear box (200), of the connecting seat (410) is abutted against the outer surface, close to the gear box (200), of the driving part (100), the connecting seat (410) is made of a plastic material with a second specification, and the melt index of the connecting seat (410) is different from that of the gear box (200);

the connecting part (400) further comprises a connecting piece (420), the connecting piece (420) is arranged on one side of the connecting seat (410) and made of plastic materials with the first specification, and the connecting piece (420) is fixedly connected with the connecting seat (410), welded with the gear box (200) and fixedly connected with the driving piece (100).

2. The transmission device according to claim 1, wherein the engagement member (420) comprises an engagement body (421), the engagement body (421) is sleeved on the periphery of the connection seat (410), and an inner wall of the engagement body (421) is attached to an outer wall of the connection seat (410);

a first connecting structure is arranged on the inner wall of the connecting body (421), a second connecting structure is arranged on the outer wall of the connecting seat (410), one of the first connecting structure and the second connecting structure is a connecting concave part, the other is a connecting convex part, the connecting convex part is positioned in the connecting concave part, the outer wall, close to the driving piece (100), of the connecting convex part is a first outer wall, and the first outer wall is attached to the inner wall, close to the driving piece (100), of the connecting concave part so as to block the connecting seat (410) from moving towards the gear box (200); the outer wall of the connecting convex part, which is arranged adjacent to the first outer wall, is a second outer wall and a third outer wall, the second outer wall is attached to the first inner wall of the connecting concave part, and the third outer wall is attached to the second inner wall of the connecting concave part, which is arranged opposite to the first inner wall, so that the power of the output end of the driving part (100) is transmitted to the input end of the transmission part (300).

3. The transmission of claim 2, wherein the first connection structure is a snap post (422) and the second connection structure is a snap groove.

4. A transmission according to claim 3, wherein the snap-in post (422) comprises a connecting portion (4221) and a reinforcing portion (4222), the connecting portion (4221) being fixedly connected to the inner wall of the engagement body (421), the reinforcing portion (4222) being fixedly connected to a side of the connecting portion (4221) remote from the engagement body (421), a projection of the reinforcing portion (4222) onto the inner wall of the engagement body (421) at least partially covering a projection of the connecting portion (4221) onto the inner wall of the engagement body (421).

5. A transmission according to claim 3, wherein a plurality of the snap posts (422) are provided, the plurality of snap posts (422) being disposed on the inner wall of the engagement body (421) at intervals in a direction from the driving member (100) to the gear box (200); the number of the clamping grooves is consistent with that of the clamping columns (422), the clamping grooves are arranged on the outer wall of the connecting seat (410) at intervals in the direction from the driving piece (100) to the gear box (200), and the clamping columns (422) correspond to the clamping grooves one by one.

6. The transmission device according to claim 5, wherein the inner wall of the engagement body (421) is further provided with a limiting body (423), the number of the limiting bodies (423) is one less than the number of the clamping posts (422), and each limiting body (423) is fixedly installed between two adjacent clamping posts (422);

the connecting seat (410) is provided with first limit grooves, the number of the first limit grooves is consistent with that of the limit bodies (423), the limit bodies (423) are respectively positioned in the first limit grooves in a one-to-one correspondence mode, and the limit bodies (423) are respectively matched with the first limit grooves;

the outer wall of the limiting body (423) is provided with a first limiting structure, the groove wall of the first limiting groove is provided with a second limiting structure, one of the first limiting structure and the second limiting structure is a limiting convex part, the other is a limiting concave part, the limiting convex part is positioned in the limiting concave part, and the limiting convex part is matched with the limiting concave part so as to block the connecting seat (410) from moving towards the gear box (200).

7. The transmission device according to claim 6, characterized in that a recess is provided on the outer wall of the limiting body (423), the projection of the clamping post (422) onto the outer surface of the driving member (100) at least partially covers the projection of the limiting body (423) onto the outer surface of the driving member (100), and the recess is formed as the first limiting structure; the groove wall of the first limit groove is provided with a lug (412), the lug (412) is embedded into the concave, the lug (412) is matched with the concave, and the lug (412) is formed into the second limit structure.

8. The transmission according to claim 1, characterized in that the driving member (100) comprises a driving body (110), a driving shaft (120) and a protruding portion (130), a first end of the driving shaft (120) being in driving connection with the driving body (110) and a second end being in driving connection with an input end of the transmission part (300), the driving shaft (120) being formed as an output end of the driving member (100); the protruding portion (130) is arranged on one side, close to the gear box (200), of the driving body (110), sleeved on the periphery of the driving shaft (120) and penetrated in the penetrating through hole, a penetrating hole for the driving shaft (120) to penetrate through and out is formed in the protruding portion (130), the driving shaft (120) is rotatably penetrated in the penetrating hole, a protrusion (411) is arranged on the hole wall of the penetrating through hole, and the outer wall of the protruding portion (130) is abutted to the outer surface of the protrusion (411); or alternatively, the first and second heat exchangers may be,

a fixing screw (430) is arranged between the connecting piece (420) and the driving piece (100), and the fixing screw (430) penetrates through the connecting piece (420) and into the driving piece (100) and is in threaded connection with the driving piece (100); or alternatively, the first and second heat exchangers may be,

the gear box (200) and the connecting piece (420) are made of POM materials, and the connecting seat (410) is made of PA materials.

9. The transmission device according to claim 1, characterized in that the end face of the gearbox (200) close to the driving element (100) is provided with a mounting groove, in which the connection part (400) is located;

the connecting part (400) further comprises a limiting piece (440), the limiting piece (440) is arranged on the outer wall of the connecting piece (420), a second limiting groove is formed in the groove wall of the mounting groove, the limiting piece (440) is located in the second limiting groove, and the limiting piece (440) is matched with the second limiting groove; or alternatively, the first and second heat exchangers may be,

the connecting part (400) further comprises a gasket (450), the gasket (450) is arranged between the connecting piece (420) and the groove bottom of the mounting groove, the end face, close to the groove bottom of the mounting groove, of the gasket (450) is attached to the groove bottom of the mounting groove, the end face, far away from the groove bottom of the mounting groove, of the gasket (450) is attached to the end face, far away from the driving piece (100), of the connecting piece (420), and meanwhile, the end face, far away from the driving piece (100), of the connecting seat (410) is attached to the end face.

10. A reducer comprising an output and a transmission according to any one of claims 1 to 9, the output of the transmission being drivingly connected to the output.

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