CN220131035U

CN220131035U - Sprocket transmission device

Info

Publication number: CN220131035U
Application number: CN202321160426.4U
Authority: CN
Inventors: 王会; 曹德军; 喻彦平; 邱志强
Original assignee: Suzhou Jiazhicai Optoelectronics Technology Co ltd
Current assignee: Suzhou Jiazhicai Optoelectronics Technology Co ltd
Priority date: 2023-05-15
Filing date: 2023-05-15
Publication date: 2023-12-05
Anticipated expiration: 2033-05-15

Abstract

The utility model discloses a sprocket transmission device which comprises a plurality of rollers, a plurality of transmission rods and a chain mechanism. The lithium battery is borne and driven by the two layers of transmission rods and the one layer of roller wheels, two ends of the transmission rods are fixedly connected with the chain mechanism, and the transmission rods are driven to move by the chain mechanism. The running roller is located between two-layer transfer line, and the transfer line of every layer sets up along first direction interval, in the transfer line of upper strata, and the clearance between every adjacent transfer line constitutes jointly with the running roller layer and places the district, and the battery is deposited in placing the district, bottom and running roller contact, and the running roller can rotate along circumference, promotes lithium cell at the running roller layer through the transfer line and carries out sliding transportation. The accommodation space of the placement area formed by the transmission rod and the roller is sufficient, so that the large-volume lithium battery can be transported, and the transmission rod at the two ends of the lithium battery is used for limiting the lithium battery in the first direction, so that the stability of the lithium battery in the transportation process is ensured.

Description

Sprocket transmission device

Technical Field

The utility model relates to the technical field of lithium battery transmission, in particular to a sprocket transmission device.

Background

In the prior art, most of production and processing of lithium batteries are mechanical automation, and transportation of lithium batteries drives products to move and transfer to a target position through mutual matching of a manipulator and a transmission device. The transmission device mostly adopts devices such as a transmission belt, a transmission chain, a transmission roller, and the like to carry out transmission operation on the lithium battery. In the prior art, when transmitting bulky lithium cell, transmission device lacks the fixed protective structure of adaptation, and lithium cell has the risk that drops at the in-process of transmission to the skew in position can appear in the in-process of transmission, influences the snatch judgement of follow-up manipulator, produces the influence to collecting.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks, an object of the present utility model is to provide a sprocket wheel transmission device, so as to solve the problem that the large-volume lithium battery proposed in the above-mentioned background art has a risk of falling off during the transmission process.

In order to achieve the above purpose, the technical scheme adopted by the utility model is that the chain wheel transmission device comprises a plurality of rollers, a plurality of transmission rods and a chain mechanism, wherein the rollers are sequentially arranged along a first direction and used for bearing lithium batteries. Each roller extends along a second direction, and two ends of each roller are connected with a chain mechanism and are used for enabling the rollers to rotate along the circumferential direction, and the rollers circumferentially encircle the second direction.

The transmission rods are divided into two layers along the third direction, and the transmission rods of each layer are arranged at intervals along the first direction and form a plurality of placement areas with the rollers for placing lithium batteries. Each transmission rod extends along the second direction, and two ends of each transmission rod are fixedly connected with the chain mechanism. The rollers are arranged between the two layers of transmission rods along the third direction and used for driving the lithium battery to move on the rollers along the first direction through the transmission rods, and the first direction, the second direction and the third direction are mutually perpendicular. The chain mechanism extends along a first direction and is used for driving the two layers of transmission rods to circularly move along the circumferential direction.

The sprocket transmission device mainly comprises two layers of transmission rods and one layer of roller, wherein two ends of each transmission rod are fixedly connected with a chain mechanism, and the transmission rods are driven to move through the chain mechanism. The running roller is located between two-layer transfer line, and the transfer line of every layer sets up along first direction interval, in the transfer line of upper strata, and the clearance between every adjacent transfer line constitutes jointly with the running roller layer and places the district, and the battery is deposited in placing the district, bottom and running roller contact, and the running roller can rotate along circumference, promotes lithium cell at the running roller layer through the transfer line and carries out sliding transportation. The accommodation space of the placement area formed by the transmission rod and the roller is sufficient, so that the large-volume lithium battery can be transported, and the transmission rod at the two ends of the lithium battery is used for limiting the lithium battery in the first direction, so that the stability of the lithium battery in the transportation process is ensured.

In some embodiments, the chain mechanism includes a first chain transmission device, the first chain transmission device includes a first fixed rod, a second fixed rod and a first chain, the first fixed rod and the second fixed rod all extend along a first direction and are sequentially arranged at intervals along a third direction, and the first chain is arranged on the first fixed rod in a circulating rotation mode along a circumferential direction. One end of the transmission rod along the second direction is fixedly connected with the first chain, and one end of the roller along the second direction is rotatably arranged in the first fixed rod.

By adopting the technical scheme, the first chain transmission device is connected with one end of the transmission rod through the first chain, and one end of the roller is fixed in the first fixed rod. The first chain can circularly rotate around the first fixed rod along the circumferential direction, so that the two layers of transmission rods are driven to circularly rotate.

In some embodiments, the chain mechanism includes a second chain transfer device. The second chain transmission device comprises a third fixed rod, a fourth fixed rod and a second chain, wherein the third fixed rod and the fourth fixed rod extend along the first direction and are sequentially arranged at intervals along the third direction, and the second chain is arranged in the third fixed rod in a circumferential circulating rotation mode. The other end of the transmission rod along the second direction is fixedly connected with the first chain, and the other end of the roller along the second direction is rotatably arranged in the first fixed rod.

By adopting the technical scheme, the second chain transmission device is connected with the other end of the transmission rod along the second direction through the second chain, the second chain can circularly rotate along the circumferential direction around the third fixed rod, and the transmission rod is driven to transmit with the lithium battery in the placement area by driving the first chain and the second chain to circularly rotate simultaneously. The other end of the roller is fixed in the third fixed rod, so that the position of the roller is ensured not to deviate, and the roller can rotate along the circumferential direction, so that the lithium battery can slide and transmit on the roller layer.

In some embodiments, a plurality of bending sheet metal parts corresponding to the positions of the transmission rods are arranged in the first chain and the second chain, and the bending sheet metal parts are bent along the second direction and are fixedly connected with the transmission rods.

By adopting the technical scheme, the transmission rod is fixedly connected with the first chain and the second chain through the bent sheet metal part, the bent sheet metal part is manufactured by a sheet metal process, the whole weight is light, welding is easy to perform, and the connecting effect is stable.

In some embodiments, each of the transmission rods is provided with a pulley at both ends in the second direction and at a side away from the roller in the third direction for sliding abutment with the second and fourth fixing rods.

By adopting the technical scheme, the first chain and the second chain can naturally fall down due to self gravity, so that the chain can vibrate in the running process, the chain can be separated from the wheel possibly, the stability of the transmission device is directly influenced, and therefore, the pulleys are arranged at the two ends of the transmission rod and are in sliding butt with the second fixing rod and the fourth fixing rod, and the first chain and the second chain can keep a stretching state all the time.

In some embodiments, the sprocket transfer device includes a divider comprising a first cross bar, a second cross bar, and a plurality of spacer bars, wherein the plurality of spacer bars are disposed above the drive bar in a third direction and are arranged between the first and third fixed bars at intervals along a second direction for dividing the placement area, each spacer bar extending in the first direction. The first cross rod and the second cross rod extend along the second direction and are respectively arranged at two ends of the plurality of spacing rods along the first direction.

By adopting the technical scheme, the column dividing device consists of a first cross rod, a second cross rod and a plurality of spacing rods, each spacing rod extends along the first direction, and two ends of each spacing rod are fixedly connected with the first cross rod and the second cross rod. The spacer bar is arranged above the transmission bar and is arranged at intervals along the second direction, the placement area is divided into a plurality of small placement areas, each small placement area accommodates a lithium battery and is limited in the second direction through the spacer bars on two sides of the lithium battery along the second direction, and the stability of the lithium battery in the transmission process is enhanced.

In some embodiments, the spacer bar includes a plurality of first support bars and a plurality of second support bars. The first support rod and the second support rod are arranged at the top of the spacing rod along the third direction and extend along the first direction. The first support rods are arranged at one end close to the first cross rod, and the second support rods are arranged at one end close to the second cross rod and are used for being fixedly connected with the lithium battery in an abutting mode through the adjacent first support rods or second support rods.

By adopting the technical scheme, the first supporting rod is arranged at one end of the spacing rod, which is close to the first cross rod, namely the feeding position of the transmission device, so as to place the lithium battery; the second bracing piece is located the spacer bar and is close to the one end of second horizontal pole, and ejection of compact position carries out the roll-out of lithium cell. The lithium battery is clamped through the adjacent support rods, so that the position of the lithium battery can be accurately judged when the manipulator places or rotates out of the lithium battery.

In some embodiments, the spacer bar further comprises a plurality of lateral bearings disposed at intervals along the first direction on top of the spacer bar and between the first and second rails, the axial direction of each lateral bearing extending along the third direction and being a cylinder extending along the third direction.

By adopting the technical scheme, each spacing rod is provided with a plurality of transverse bearings between the first transverse rod and the second transverse rod, and the transverse bearings can rotate around the axial direction and are in sliding butt joint with the battery, so that the collision between the lithium battery and the spacing rod is avoided.

In some embodiments, the sprocket transfer device further comprises a drive device comprising a motor and a drive chain, the drive chain being wound around the motor and the chain mechanism for transfer by the motor driving the chain mechanism.

By adopting the technical scheme, the motor is used as a power source of the chain wheel transmission device and is connected with the chain mechanism through the transmission chain, so that the first chain and the second chain are driven to carry out transmission.

Drawings

FIG. 1 is a perspective view of one embodiment of a sprocket transfer apparatus according to the present utility model;

FIG. 2 is a side view of one embodiment of a sprocket transfer apparatus of the present utility model;

FIG. 3 is an enlarged view of FIG. 1 at A;

FIG. 4 is an enlarged view at B in FIG. 1;

in the figure:

1-a roller;

2-a transmission rod; 20-pulleys; 21-a placement area;

3-a chain mechanism; 30-a first chain transfer device; 300-a first fixing rod; 301-a second fixing rod; 302-a first chain; 31-a second chain transfer device; 310-a third fixing rod; 311-fourth fixed bars; 312-a second chain; 32-bending the sheet metal part;

4-a column dividing device; 40-a first rail; 41-a second cross bar; 42-spacer bars; 43-a first support bar; 44-a second support bar; 45-transverse bearings;

5-a driving device; 50-an electric motor; 51-a drive chain;

a 6-lithium battery.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

For convenience of the following description, before describing a specific structure of the sprocket transmission apparatus, the present utility model defines a first direction (X), a second direction (Y), and a third direction (Z) with reference to fig. 1. Wherein the first direction is the length direction, such as the X direction, of the sprocket transmission device when normally placed; the second direction is the direction of the width of the sprocket conveyor when it is normally placed, for example, the Y direction; the third direction is the height direction of the sprocket conveyor, e.g. the Z-direction. In the present utility model, the first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other. It is understood that the perpendicularity of the present utility model is not absolute, and that approximate perpendicularity due to machining errors and assembly errors (e.g., an angle of 89.9 ° between two structural features) is also within the scope of the perpendicularity of the present utility model.

Referring to fig. 1 and 2, fig. 1 is a perspective view showing a sprocket transmission apparatus according to an embodiment of the present utility model; fig. 2 shows a side view of a sprocket transfer apparatus provided by an embodiment of the present utility model.

In some embodiments, referring to fig. 1 and 2, the present utility model provides a sprocket transmission apparatus, including a plurality of rollers 1, a plurality of transmission rods 2, and a chain mechanism 3, wherein the plurality of rollers 1 are sequentially disposed along and along a first direction (shown in an X direction in fig. 1) for carrying a lithium battery 6. Each roller 1 extends in a second direction (indicated by Y direction in fig. 1) and is connected at both ends to a chain mechanism 3 for enabling the roller 1 to rotate in a circumferential direction (indicated by θ direction in fig. 1) circumferentially around the second direction.

The transmission rods 2 are divided into two layers along the third direction, and the transmission rods 2 of each layer are arranged at intervals along the first direction and form a plurality of placement areas 21 with the roller 1 for placing the lithium batteries 6. Each transmission rod 2 extends along the second direction, and two ends of each transmission rod are fixedly connected with the chain mechanism 3. The rollers 1 are arranged between the two layers of transmission rods 2 along a third direction (shown in a Z direction in fig. 1) and are used for driving the lithium battery 6 to move along the first direction on the rollers 1 through the transmission rods 2. The chain mechanism 3 extends along a first direction and is used for driving the two layers of transmission rods 2 to circularly move along the circumferential direction.

The chain wheel transmission device mainly comprises two layers of transmission rods 2 and one layer of roller 1, wherein two ends of each transmission rod 2 are fixedly connected with a chain mechanism 3, and the transmission rods 2 are driven to move through the chain mechanism 3. The running roller 1 is located between two-layer transfer line 2, and transfer line 2 of every layer sets up along first direction interval, in transfer line 2 on upper strata, and every adjacent clearance between transfer line 2 constitutes the district 21 jointly with running roller 1 layer and places the district 21, and the battery is deposited in placing the district 21, and the bottom is contacted with running roller 1, and running roller 1 can rotate along circumference, promotes lithium cell 6 and carries out sliding transportation at running roller 1 layer through transfer line 2. The accommodating space of the placement area 21 formed by the transmission rod 2 and the roller 1 is sufficient, so that the large-volume lithium battery 6 can be transported, and the transmission rod 2 at the two ends of the lithium battery 6 is used for limiting the lithium battery in the first direction, so that the stability of the lithium battery in the transportation process is ensured.

Referring to fig. 3, fig. 3 is an enlarged view at a in fig. 1.

In some embodiments, referring to fig. 1 to 3, the chain mechanism 3 includes a first chain transmission device 30, the first chain transmission device 30 includes a first fixing rod 300, a second fixing rod 301, and a first chain 302, the first fixing rod 300 and the second fixing rod 301 each extend along a first direction and are sequentially spaced apart along a third direction, and the first chain 302 is provided to the first fixing rod 300 in a circumferential circulating rotation manner. One end of the transmission rod 2 along the second direction is fixedly connected with the first chain 302, and one end of the roller 1 along the second direction is rotatably arranged in the first fixing rod 300.

Illustratively, the first chain transmission device 30 is connected to one end of the transmission rod 2 through a first chain 302, and one end of the roller 1 is clamped in the first fixing rod 300, so that it can rotate in the circumferential direction. The first chain 302 can circularly rotate around the first fixing rod 300 along the circumferential direction, so as to drive the two layers of transmission rods 2 to circularly rotate.

In some embodiments, referring to fig. 2, the chain mechanism 3 includes a second chain transfer device 31. The second chain transmission device 31 includes a third fixing rod 310, a fourth fixing rod 311 and a second chain 312, where the third fixing rod 310 and the fourth fixing rod 311 extend along a first direction and are sequentially spaced along the third direction, and the second chain 312 is disposed in the third fixing rod 310 in a manner of circulating rotation along a circumferential direction. The other end of the transmission rod 2 along the second direction is fixedly connected with the first chain 302, and the other end of the roller 1 along the second direction is rotatably arranged in the first fixed rod 300.

The second chain transmission device 31 is connected to the other end of the transmission rod 2 along the second direction through a second chain 312, the second chain 312 can rotate around the third fixing rod 310 in a circulating manner along the circumferential direction, and the transmission rod 2 is driven to transmit with the lithium battery 6 in the placement area 21 by driving the first chain 302 and the second chain 312 to rotate in a circulating manner. The other end of the roller 1 is clamped in the third fixing rod 310, so that the position of the roller 1 is ensured not to deviate, and the roller 1 can rotate along the circumferential direction, so that the lithium battery 6 can slide and transmit on the layer of the roller 1.

Referring to fig. 4, fig. 4 is an enlarged view at B in fig. 1.

In some embodiments, referring to fig. 3 and 4, a plurality of bending sheet metal parts 32 corresponding to the positions of the transmission rods 2 are disposed in the first chain 302 and the second chain 312, and the bending sheet metal parts 32 are bent along the second direction for fixedly connecting with the transmission rods 2.

Illustratively, the transmission rod 2 is fixedly connected with the first chain 302 and the second chain 312 through the bending sheet metal part 32, the bending sheet metal part 32 is manufactured by a sheet metal process, the whole weight is light, welding is easy, and the connecting effect is stable.

In some embodiments, referring to fig. 3 and 4, each of the transmission rods 2 is provided with a pulley 20 at both ends in the second direction and at a side away from the roller 1 in the third direction, for sliding abutment with the second fixing rod 301 and the fourth fixing rod 311.

Illustratively, the first chain 302 and the second chain 312 may have a natural falling phenomenon due to their own weight, resulting in vibration of the chains during operation, possibly resulting in chain derailment, directly affecting the stability of the transmission device, and thus the pulleys 20 are disposed at both ends of the transmission rod 2 and slidably abutted with the second fixing rod 301 and the fourth fixing rod 311, so that the first chain 302 and the second chain 312 can always maintain a stretched state.

In some embodiments, referring to fig. 1 and 4, the sprocket transfer apparatus includes a rail dividing apparatus 4, the rail dividing apparatus 4 including a first rail 40, a second rail 41, and a plurality of spacing bars 42, wherein the plurality of spacing bars 42 are disposed above the driving bar 2 in a third direction and are spaced between the first fixing bar 300 and the third fixing bar 310 in a second direction for dividing the placement area 21, each of the spacing bars 42 extending in the first direction. The first cross bar 40 and the second cross bar 41 each extend along the second direction and are disposed at two ends of the plurality of spacing bars 42 along the first direction.

Illustratively, the rail device 4 is composed of a first cross bar 40, a second cross bar 41 and a plurality of spacing bars 42, each spacing bar 42 extending in a first direction, and being fixedly connected at both ends to the first cross bar 40 and the second cross bar 41. The spacing rod 42 is arranged above the transmission rod 2 and is arranged at intervals along the second direction, the placement area 21 is divided into a plurality of small placement areas, each small placement area accommodates one lithium battery 6 and is limited in the second direction through the spacing rods 42 on two sides of the lithium battery 6 along the second direction, and the stability of the lithium battery 6 in the transmission process is enhanced.

In some embodiments, referring to fig. 1 and 4, the spacer bar 42 includes a plurality of first support bars 43 and a plurality of second support bars 44. The first support bar 43 and the second support bar 44 are each provided on top of the spacing bar 42 in the third direction and extend in the first direction. The plurality of first support rods 43 are disposed near one end of the first cross rod 40, and the plurality of second support rods 44 are disposed near one end of the second cross rod 41, for being abutted and fixed with the lithium battery 6 through the adjacent first support rods 43 or second support rods 44.

Illustratively, the first supporting rod 43 is disposed at one end of the spacing rod 42 near the first cross rod 40, that is, the feeding position of the conveying device, for placing the lithium battery 6; the second support bar 44 is disposed at one end of the spacer bar 42 near the second cross bar 41, i.e., the discharging position, and performs the turning out of the lithium battery 6. The lithium battery 6 is clamped through the adjacent support rods, so that the position of the lithium battery 6 can be accurately judged when the manipulator places or rotates out of the lithium battery 6.

In some embodiments, referring to fig. 1 and 4, the spacer bar 42 further includes a plurality of lateral bearings 45, the plurality of lateral bearings 45 being disposed at intervals along the first direction on top of the spacer bar 42 and between the first and second rails 40 and 41, an axial direction of each lateral bearing 45 extending along the third direction and being a cylindrical body extending along the third direction.

Illustratively, each spacer rod 42 is provided with a plurality of transverse bearings 45 between the first cross rod 40 and the second cross rod 41, the transverse bearings 45 can rotate around the axial direction and are in sliding abutting connection with the battery, the fixing and guiding effects on the transmission of the battery on the roller 1 are achieved, and collision between the lithium battery 6 and the spacer rods 42 can be avoided.

In some embodiments, referring to fig. 1 and 2, the sprocket transmission device further comprises a driving device 5, the driving device 5 comprises a motor 50 and a transmission chain 51, and the transmission chain 51 is wound around the motor 50 and the chain mechanism 3, and is used for driving the chain mechanism 3 to transmit through the motor 50.

Illustratively, the motor 50 serves as a power source for the sprocket transmission, and is connected to the chain mechanism 3 via a drive chain 51, thereby driving the first chain 302 and the second chain 312 for transmission.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. The sprocket transmission device is characterized by comprising a plurality of rollers, a plurality of transmission rods and a chain mechanism;

the roller edges are sequentially arranged along the first direction and are used for bearing the lithium battery; each roller extends along a second direction, and two ends of each roller are connected with the chain mechanism and are used for enabling the rollers to rotate along the circumferential direction, and the circumferential direction surrounds the second direction;

the transmission rods are divided into two layers along a third direction, and the transmission rods of each layer are arranged at intervals along the first direction and form a plurality of placement areas with the roller for placing lithium batteries; each transmission rod extends along the second direction, two ends of each transmission rod are fixedly connected with the chain mechanism, and the first direction, the second direction and the third direction are mutually perpendicular;

the rollers are arranged between the two layers of transmission rods along the third direction and are used for driving the lithium battery to move along the first direction on the rollers through the transmission rods;

the chain mechanism extends along the first direction and is used for driving the two layers of transmission rods to circularly move along the circumferential direction.

2. The sprocket conveyor of claim 1, wherein the chain mechanism comprises a first chain conveyor; the first chain transmission device comprises a first fixed rod, a second fixed rod and a first chain, wherein the first fixed rod and the second fixed rod extend along the first direction and are sequentially arranged at intervals along the third direction, and the first chain is arranged on the first fixed rod in a mode of circulating rotation along the circumferential direction; one end of the transmission rod along the second direction is fixedly connected with the first chain, and one end of the roller along the second direction is rotatably arranged in the first fixing rod.

3. The sprocket conveyor of claim 2, wherein the chain mechanism comprises a second chain conveyor; the second chain transmission device comprises a third fixed rod, a fourth fixed rod and a second chain, wherein the third fixed rod and the fourth fixed rod extend along the first direction and are sequentially arranged at intervals along the third direction, and the second chain is arranged in the third fixed rod in a mode of circulating rotation along the circumferential direction; the other end of the transmission rod along the second direction is fixedly connected with the first chain, and the other end of the roller along the second direction is rotatably arranged in the first fixing rod.

4. The sprocket transmission apparatus according to claim 3, wherein a plurality of bending sheet metal parts corresponding to the transmission rod are disposed in the first chain and the second chain, and the bending sheet metal parts are bent along the second direction and are fixedly connected with the transmission rod.

5. A sprocket moving apparatus according to claim 3, wherein each of the transmission rods has pulleys provided at both ends thereof in the second direction and at a side thereof away from the roller in the third direction for sliding abutment with the second and fourth fixing rods.

6. A sprocket transfer apparatus according to claim 3, comprising a rail dividing means; the rail separating device comprises a first cross rod, a second cross rod and a plurality of spacing rods; the plurality of spacing rods are arranged above the transmission rod along the third direction and are arranged between the first fixing rod and the third fixing rod at intervals along the second direction, and are used for separating the placement areas, and each spacing rod extends along the first direction; the first cross rod and the second cross rod extend along the second direction and are respectively arranged at two ends of the plurality of spacing rods along the first direction.

7. The sprocket transfer apparatus of claim 6, wherein the spacer bar comprises a plurality of first support bars and a plurality of second support bars; the first support rod and the second support rod are arranged at the top of the spacing rod along the third direction and extend along the first direction; the first support rods are arranged at one end close to the first cross rod, and the second support rods are arranged at one end close to the second cross rod and are used for being abutted and fixed with the lithium battery through the adjacent first support rods or the adjacent second support rods.

8. The sprocket transfer apparatus of claim 7, wherein the spacer bar further comprises a plurality of transverse bearings; the plurality of transverse bearings are arranged at intervals on the top of the spacing rod along the first direction and are positioned between the first cross rod and the second cross rod; the axial direction of each of the lateral bearings extends in the third direction and is a cylindrical body extending in the third direction.

9. The sprocket transmission apparatus as set forth in claim 1, further comprising a drive means; the driving device comprises a motor and a transmission chain, wherein the transmission chain is wound on the motor and the chain mechanism and is used for driving the chain mechanism to transmit through the motor.