Transmission sleeve and jig conveying device

Abstract

The utility model relates to a transmission mechanism technical field, and concretely relates to a transmission sleeve and jig conveying device, transmission sleeve includes the shaft sleeve, the inner wall of shaft sleeve forms and sets up the first key groove along its length direction, the outer wall of shaft sleeve forms and sets up the second key groove along its length direction, along the radial direction of shaft sleeve, still be provided with the threaded hole of through inside and outside wall on shaft sleeve, wherein, transmission sleeve is used for through the first key groove and the first transmission part that inserts in the shaft sleeve circumferential fixed, for through the second key groove and the second transmission part that are sleeved in the shaft sleeve circumferential fixed, still be used for through the threaded fastener of screwing to the threaded hole and the first transmission part axial fixed, and the transmission sleeve and first transmission part, second transmission part synchronous rotation after connection. The transmission sleeve can realize the cooperation of inner and outer rings and synchronous linkage of the installation structure of inner and outer rings, and can also realize the tightness control of the transmission sleeve and its inner ring connection structure.

Description

Technical Field

[0001] This utility model relates to the field of conveying mechanism technology, and specifically to a transmission sleeve and jig conveying device. Background Technology

[0002] Existing jig conveying mechanisms often suffer from problems such as jig deviation, jig collision noise, non-adjustable or complex width adjustment, complex maintenance, poor expandability, high cost, poor load capacity, and poor stability. In particular, the equipment needs to be disassembled when adjusting the width or replacing and maintaining the conveyor belt.

[0003] Therefore, in view of the above shortcomings, this utility model is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a transmission sleeve and jig conveying device to at least partially solve the above-mentioned technical problems.

[0005] The first aspect of this utility model provides a transmission sleeve, including a bushing, wherein the inner wall of the bushing is formed with a first keyway arranged along its length direction, the outer wall of the bushing is formed with a second keyway arranged along its length direction, and a threaded hole penetrating the inner and outer walls is also provided on the bushing along the radial direction.

[0006] The transmission sleeve is used to be circumferentially fixed to the first transmission component inserted into the bushing via the first keyway, and to be circumferentially fixed to the second transmission component fitted outside the bushing via the second keyway. It is also used to be axially fixed to the first transmission component via a threaded fastener screwed to the threaded hole. The connected transmission sleeve rotates synchronously with the first transmission component and the second transmission component.

[0007] The transmission sleeve provided by this utility model may also have the following additional technical features:

[0008] In some embodiments, the bushing is further provided with at least two positioning recesses, and the positioning recesses are provided with elastic retaining rings.

[0009] In some embodiments, the first keyway and the second keyway are offset circumferentially from each other in the bushing; and / or

[0010] There are two threaded holes, which are spaced apart along the outer periphery of the end of the bushing.

[0011] The second aspect of this utility model also provides a fixture conveying device, comprising:

[0012] Support components;

[0013] The conveying assembly comprises two sets, each including a support sleeve, pulleys, a conveyor belt, and a transmission sleeve as described above. The transmission sleeve and the support sleeve are mounted on the support assembly, and each of the transmission sleeve and the support sleeve is provided with a pulley. The conveyor belt is wound around the pulley, and the two conveyor belts are arranged in parallel.

[0014] The drive assembly includes a drive shaft and a drive motor, wherein the drive shaft is inserted into two of the drive sleeves, and the drive motor is mounted on the support assembly and connected to one of the drive sleeves;

[0015] The drive motor is used to drive the transmission sleeve to rotate, the transmission sleeve is used to drive the pulley thereon to rotate, the transmission sleeve is also used to drive another transmission sleeve and the pulley to rotate via the transmission shaft, and the pulley is used to drive the conveyor belt to rotate to transport the fixture placed thereon.

[0016] In some embodiments, a plurality of third keyways are provided at intervals along the length of the drive shaft, and the drive shaft is connected to the drive sleeve by a key that is simultaneously inserted into the first keyway and one of the third keyways.

[0017] In some embodiments, the support assembly includes a workbench and two first uprights and two second uprights mounted on the workbench, the two first uprights being arranged parallel to each other, and the two second uprights being arranged coplanarly with one of the first uprights.

[0018] In some embodiments, both the first upright plate and the second upright plate include a base with a first elongated hole and are mounted on the workbench by a threaded connector inserted into the first elongated hole; the first upright plate and the second upright plate can also adjust the distance between the two first upright plates and the two second upright plates by adjusting the position of the threaded connector in the first elongated hole.

[0019] And / or, the first upright plate is provided with a through hole, the transmission sleeve is inserted into the through hole, and the transmission sleeve is fitted with a shaft elastic retaining ring on both sides of the through hole;

[0020] And / or, the end of the support sleeve is provided with a connecting flange, and the support sleeve is installed to the second upright plate through the connecting flange;

[0021] And / or, the conveying assembly further includes a guide idler wheel and a tensioning pulley mounted on the second vertical plate, and the tensioning pulley is position-adjustable on the second vertical plate, and the conveyor belt is wound around the tensioning pulley after being guided by the guide idler wheel.

[0022] In some embodiments, the drive assembly further includes a drive wheel, a driven wheel, and a transmission belt. The drive wheel is connected to the drive motor, the driven wheel is fitted into a transmission sleeve, and the transmission belt is wound around the drive wheel and the driven wheel.

[0023] In some embodiments, the first upright plate is provided with a vertical second elongated hole, and the drive motor is installed in the second elongated hole by threaded fasteners.

[0024] In some embodiments, a transition bearing is provided on the side of the two second upright plates opposite to the first upright plate, the transition bearing being used to assist in supporting the fixture.

[0025] The transmission sleeve provided by this utility model features a bushing with a central cavity, and keyways extending axially on both its inner and outer walls. The first keyway on the inner wall can be circumferentially fixed to the first transmission component via a key, and the second keyway on the outer wall can be circumferentially fixed to the second transmission component via a key. Therefore, when driving force is applied to the bushing, the first transmission component, or the second transmission component, they can all rotate synchronously. Simultaneously, the driving force can be transmitted to the connected structure via the first or second transmission component, achieving linkage. Furthermore, by providing a through-hole threaded hole on the bushing, a threaded fastener screwed into the threaded hole and pressed against the first transmission component can be axially fixed to the transmission sleeve. Unscrewing the threaded fastener allows the first transmission component to be reconnected to the transmission sleeve. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the fixture conveying device in this utility model;

[0028] Figure 2 This is a schematic diagram of the transmission sleeve in an embodiment of the present utility model;

[0029] Figure 3 This is a schematic diagram of the drive shaft structure;

[0030] Figure 4 This is a schematic diagram of the support sleeve.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100 - Fixture conveying device;

[0033] 10-Support assembly, 11-First upright plate, 12-Second upright plate, 13-Base, 14-First elongated hole, 15-Side baffle; 20-Conveying assembly, 21-Transmission sleeve, 211-First keyway, 212-Second keyway, 213-Threaded hole, 214-Positioning concave ring; 22-Support sleeve, 23-Pulley, 24-Conveyor belt, 25-Tensioning pulley, 26-Guide idler pulley; 30-Drive assembly, 31-Drive shaft, 311-Third keyway, 32-Drive motor, 33-Driving wheel, 34-Transmission belt, 35-Driven wheel; 40-Transition bearing. Detailed Implementation

[0034] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0035] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0036] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0037] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0038] Reference Figures 1-4 The first aspect of this utility model provides a transmission sleeve 21, including a bushing. The inner wall of the bushing has a first keyway 211 arranged along its length direction, and the outer wall of the bushing has a second keyway 212 arranged along its length direction. Along the radial direction of the bushing, the bushing also has a threaded hole 213 penetrating the inner and outer walls. The transmission sleeve 21 is used to fix circumferentially to a first transmission component inserted into the bushing through the first keyway 211, to fix circumferentially to a second transmission component fitted outside the bushing through the second keyway 212, and to fix axially to the first transmission component through a threaded fastener screwed to the threaded hole 213. The connected transmission sleeve 21 rotates synchronously with the first transmission component and the second transmission component.

[0039] Specifically, the bushing is formed as a shaft structure with a central cavity. The inner wall of the central cavity has a first keyway 211 extending along its length. A key located within the first keyway 211 can be fitted and connected to a first transmission component, which also has a keyway, inserted into the central cavity. The connected bushing and the first transmission component are circumferentially fixed, allowing them to rotate synchronously. Similarly, the outer circumferential wall of the bushing has a second keyway 212 extending along its length. A key located within the second keyway 212 can be fitted and connected to a second transmission component, which also has a keyway, fitted onto the outside of the bushing. The connected bushing and the second transmission component are circumferentially fixed, allowing them to rotate synchronously. In other words, the above configuration enables the bushing, the first transmission component, and the second transmission component to rotate synchronously. Thus, when driving force is applied to the bushing, the first transmission component, or the second transmission component, based on the above connection method, the bushing, the first transmission component, or the second transmission component can all rotate synchronously. Simultaneously, the driving force can be transmitted to the connected structure through the first or second transmission component, achieving linkage.

[0040] It should be noted that a first transmission component is connected inside the bushing, and multiple second transmission components can be connected outside the bushing. The multiple second transmission components are arranged sequentially along the radial direction of the bushing. In order to avoid mutual interference among the multiple second transmission components, the bushing can be set as a multi-segment structure. The radial diameter of the multi-segment structure is set to decrease sequentially, and the multiple second transmission components are distributed on different segments.

[0041] The bushing is also provided with a through threaded hole 213 on its side wall, so that the threaded connector can be screwed in. As the threaded connector is screwed in, its end will screw into the central cavity and then abut against the first transmission component. In the tightened state, the threaded fastener can further strengthen the connection between the first transmission component and the bushing and make it relatively fixed in both the axial and radial directions.

[0042] The transmission sleeve 21 provided in this embodiment is provided with a bushing having a central cavity, and both the inner and outer walls of the bushing are provided with keyways extending along their axial direction. Thus, the first keyway 211 on the inner wall can be circumferentially fixed to the first transmission component by a key, and the second keyway 212 on the outer wall can be circumferentially fixed to the second transmission component by a key. Therefore, when driving force is applied to the bushing, the first transmission component, or the second transmission component, the bushing, the first transmission component, or the second transmission component can all rotate synchronously. Simultaneously, the driving force can be transmitted to the connected structure through the first transmission component or the second transmission component, achieving linkage. Furthermore, by providing a through threaded hole 213 on the bushing, a threaded fastener screwed into the threaded hole 213 and pressed against the first transmission component can be axially fixed between the first transmission component and the transmission sleeve 21. Unscrewing the threaded fastener allows the first transmission component to be reconnected to the transmission sleeve 21.

[0043] In some embodiments, the bushing is further provided with at least two positioning recesses 214, and each positioning recess 214 has an elastic retaining ring. Specifically, the bushing is connected to other devices through the shaft end between the two positioning recesses 214, and the elastic retaining ring fitted inside the positioning recess 214 limits the bushing to other devices, thereby enabling the installation of the bushing to other devices.

[0044] In some embodiments, the first keyway 211 and the second keyway 212 are offset in the circumferential direction of the bushing. This can distribute the force on the bushing and prevent damage to the bushing.

[0045] In some embodiments, there are two threaded holes 213, which are spaced apart along the outer periphery of the end of the bushing.

[0046] Specifically, the threaded hole 213 is located at the end of the bushing, thus avoiding being covered by the second transmission component, thereby facilitating the operator to screw the threaded connection in and out.

[0047] The second aspect of this utility model also provides a jig conveying device 100, including a support assembly 10, a conveying assembly 20, and a drive assembly 30. The conveying assembly 20 consists of two sets, each including a support sleeve 22, a pulley 23, a conveyor belt 24, and a transmission sleeve 21 of any one of the above. The transmission sleeve 21 and the support sleeve 22 are mounted on the support assembly 10, and each of the transmission sleeve 21 and the support sleeve 22 is provided with a pulley 23. The conveyor belt 24 is wound around the pulley 23, and the two conveyor belts 24 are arranged in parallel. The drive assembly 30 includes a drive shaft 31 and a drive motor 32. The drive shaft 31 is inserted into the two transmission sleeves 21, and the drive motor 32 is mounted on the support assembly 10 and connected to one of the transmission sleeves 21. The drive motor 32 drives the transmission sleeve 21 to rotate, and the transmission sleeve 21 drives the pulley 23 on it to rotate. The transmission sleeve 21 also drives the other transmission sleeve 21 and the pulley 23 to rotate via the drive shaft 31. The pulley 23 drives the conveyor belt 24 to rotate to convey the jig placed on it.

[0048] Specifically, the support assembly 10 is used to provide installation support. The conveying assembly 20 consists of two sets, each including a support sleeve 22, a pulley 23, a conveyor belt 24, and a transmission sleeve 21. The transmission sleeve 21 and the support sleeve 22 are spaced apart on the support assembly 10 with their central axes parallel. Each transmission sleeve 21 and support sleeve 22 is fitted with a pulley 23. The conveyor belt 24 is fitted in the transmission sleeve 21 and support sleeve 22 and can be driven by the pulley 23. The two conveyor belts 24 are arranged in parallel and can be placed on both sides of the fixture to realize the conveying of the fixture.

[0049] The drive assembly 30 includes a drive shaft 31 and a drive motor 32. The drive shaft 31 is inserted into two drive sleeves 21, and the drive motor 32 is mounted on the support assembly 10 and connected to the drive sleeves 21, thereby driving the drive sleeves 21 to rotate.

[0050] It should be noted that the drive shaft 31 is provided with a third keyway 311, and is adapted to be connected to the drive sleeve 21 by keys simultaneously inserted into the first keyway 211 and the third keyway 311. The pulley 23 is provided with a fourth keyway, and is adapted to be connected to the drive sleeve 21 by keys simultaneously inserted into the second keyway 212 and the fourth keyway. In this way, the drive shaft 31 is inserted into the drive sleeve 21, which is equivalent to the first transmission component, and the pulley 23 is sleeved in the drive sleeve 21, which is equivalent to the second transmission component. When the drive motor 32 drives the drive sleeve 21 to rotate, the drive sleeve 21, the pulley 23, the drive shaft 31, another drive sleeve 21 connected to the drive shaft 31, and the pulley 23 located on it can rotate synchronously, thereby driving the conveyor belt 24 to drive the conveyor belt, thus realizing the conveying of the fixture.

[0051] The fixture conveying device 100 provided by this utility model connects two transmission sleeves 21 through a transmission shaft 31, thereby enabling the two conveying components 20 to rotate synchronously. That is, a drive motor 32 drives the two conveyor belts 24 at the same time, which can avoid the fixture deviation problem caused by the difference in the running speed of the conveyor belts 24.

[0052] In some embodiments, a plurality of third keyways 311 are provided at intervals along the length of the drive shaft 31, and the drive shaft 31 is connected to the drive sleeve 21 by a key that is simultaneously inserted into the first keyway 211 and one of the third keyways 311.

[0053] This embodiment improves the connection flexibility between the drive shaft 31 and the drive sleeve 21 by providing multiple third keyways 311, facilitating adjustment of the width between the two drive sleeves 21 and thus making the width between the two conveying components 20 adjustable. Optionally, the width between the two conveying components 20 can be adjusted between 60-250mm by adjusting the length of the drive shaft 31. Of course, the length of the drive shaft 31 can also be increased to further increase the width between the two conveying components 20. Furthermore, this embodiment improves the structural strength of the drive shaft 31 by spaced-out third keyways 311.

[0054] In some embodiments, the support assembly 10 includes a workbench and two first upright plates 11 and two second upright plates 12 mounted on the workbench. The two first upright plates 11 are arranged in parallel relative to each other, and the two second upright plates 12 are respectively arranged coplanar with one of the first upright plates 11.

[0055] In this embodiment, the support component 10 is configured as two first upright plates 11 and two second upright plates 12, which facilitates the adjustment of the distance between the two first upright plates 11 and the two second upright plates 12, thereby enabling the width of the two conveying components 20 to be adjustable.

[0056] In some embodiments, the first upright plate 11 and the second upright plate 12 each include a base 13 with a first elongated hole 14 and are mounted on the workbench by a threaded connector inserted into the first elongated hole 14; the first upright plate 11 and the second upright plate 12 can also adjust the distance between the two first upright plates 11 and the two second upright plates 12 by adjusting the position of the threaded connector in the first elongated hole 14.

[0057] In this embodiment, a first elongated hole 14 is provided on the base 13 of the first upright plate 11 and the second upright plate 12, so that the first upright plate 11 and the second upright plate 12 can be adjusted within the length range of the first elongated hole 14. When the threaded connectors are both located at the opposite ends of the two first elongated holes 14, the distance between the two first upright plates 11 is the largest; when the threaded connectors are both located at the opposite ends of the two first elongated holes 14, the distance between the two first upright plates 11 is the smallest. Similarly, the distance between the second upright plates 12 is adjusted in the same way as that between the two first upright plates 11.

[0058] In some embodiments, the first upright plate 11 is provided with a through hole, the transmission sleeve 21 is inserted into the through hole, and the transmission sleeve 21 is fitted with a shaft elastic retaining ring on both sides of the through hole.

[0059] Specifically, the first vertical plate 11 is provided with a through hole, and a bearing is provided in the through hole. The transmission sleeve 21 is sleeved in the center hole of the bearing, and the axial positioning with the first vertical plate 11 is achieved by the axial elastic retaining ring sleeved in the positioning concave ring 214.

[0060] In some embodiments, the end of the support sleeve 22 is provided with a connecting flange, and the support sleeve 22 is installed to the second vertical plate 12 through the connecting flange. Furthermore, the structure of the support sleeve 22 is generally similar to that of the transmission sleeve 21, and it forms a central cavity, and keyways are formed on the inner wall and outer periphery, and it is installed through the keyways and corresponding structures, such as pulleys 23.

[0061] In some embodiments, the central cavity of the support sleeve 22 may be formed as a clearance hole to avoid the drive shaft 31 of the downstream fixture conveyor 100 when multiple fixture conveyors 100 are connected end to end.

[0062] Specifically, along the transmission direction, in two adjacent jig conveying devices 100, the widths of the two first upright plates 11 of different jig conveying devices 100 are different, and correspondingly, the widths of the two second upright plates 12 are also different. Among them, the two first upright plates 11 of the downstream jig conveying device 100 can be located between the two second upright plates 12 of the upstream jig conveying device 100. At this time, the two ends of the downstream transmission shaft 31 can be located in the clearance holes of the two upstream support sleeves 22, or the two first upright plates 11 of the downstream jig conveying device 100 can be located outside the two second upright plates 12 of the upstream jig conveying device 100. At this time, the middle part of the downstream transmission shaft 31 can be located in the clearance holes of the two upstream support sleeves 22.

[0063] This embodiment enables the jig conveying device 100 to have scalability through the above-described settings, thereby increasing the conveying length.

[0064] In some embodiments, the conveying assembly 20 further includes a guide idler pulley 26 and a tension pulley 25 mounted on the second vertical plate 12. The tension pulley 25 is position-adjustable on the second vertical plate 12, and the conveyor belt 24, after being guided by the guide idler pulley 26, is wound around the tension pulley 25. Thus, the tension of the conveyor belt 24 can be adjusted by changing the position of the tension pulley 25, thereby reducing the noise of the conveyor belt 24 during operation and facilitating quick replacement of the conveyor belt 24.

[0065] In some embodiments, the drive assembly 30 further includes a drive wheel 33, a driven wheel 35, and a transmission belt 34. The drive wheel 33 is connected to the drive motor 32, the driven wheel 35 is fitted into a transmission sleeve 21, and the transmission belt 34 is wound around the drive wheel 33 and the driven wheel 35.

[0066] Thus, the drive motor 32 can be driven to the transmission sleeve 21 via the transmission belt 34, and then the transmission sleeve 21 drives the conveying assembly 20 to start conveying.

[0067] It should be noted that the driven wheel 35 is provided with a fifth keyway, and is adapted to be connected to the transmission sleeve 21 by keys that are simultaneously inserted into the second keyway 212 and the fifth keyway. That is, the driven wheel 35 is equivalent to a second transmission component, so when it rotates under the action of the conveyor belt 34, it can drive the transmission sleeve 21, the transmission shaft 31, and the pulley 23 to rotate synchronously.

[0068] In some embodiments, the first upright plate 11 is provided with a vertical second elongated hole, and the drive motor 32 is installed in the second elongated hole by threaded fasteners. This allows for position adjustment of the drive motor 32, which in turn allows for tension adjustment of the transmission belt 34, thereby reducing the operating noise of the transmission belt 34, and also facilitates quick replacement of the transmission belt 34.

[0069] In some embodiments, a transition bearing 40 is also provided on the side of the two second upright plates 12 facing each other, away from the first upright plate 11. The transition bearing 40 is used to assist in supporting the fixture. The fixture conveyed to the end of the conveyor belt can be driven to the next level conveying structure through the transition bearing 40, thereby ensuring the smooth operation of the fixture between different conveying components 20 and simplifying the design complexity.

[0070] In some embodiments, a side baffle 15 is connected between the first upright plate 11 and the second upright plate 12, and the two conveyor belts 24 are located on opposite sides of the side baffles 15. By adjusting the length of the side baffles 15, the distance between the first upright plate 11 and the second upright plate 12 can be adjusted, thereby adjusting the transmission length of the conveyor belts 24, that is, adjusting the transmission length of the extended fixture conveying device 100.

[0071] In some embodiments, the conveyor belt 24 is internally wrapped with steel wire, which can improve the durability and load-bearing capacity of the conveyor belt 24.

[0072] The jig conveying device 100 provided in this embodiment has the advantages of adjustable transmission width, synchronous control of conveying components 20, convenient overall maintenance, good expandability, and reliable structure.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A transmission sleeve, characterized in that, The bushing includes a bushing, the inner wall of which is formed with a first keyway along its length, the outer wall of which is formed with a second keyway along its length, and a threaded hole penetrating the inner and outer walls of the bushing is also provided along the radial direction of the bushing. The transmission sleeve is used to be circumferentially fixed to the first transmission component inserted into the bushing via the first keyway, and to be circumferentially fixed to the second transmission component fitted outside the bushing via the second keyway. It is also used to be axially fixed to the first transmission component via a threaded fastener screwed to the threaded hole. The connected transmission sleeve rotates synchronously with the first transmission component and the second transmission component.

2. The transmission sleeve according to claim 1, characterized in that, The bushing is also provided with at least two positioning recesses, and each positioning recess is provided with an elastic retaining ring.

3. The transmission sleeve according to claim 1, characterized in that, The first keyway and the second keyway are offset from each other in the circumferential direction of the bushing; and / or There are two threaded holes, which are spaced apart along the outer periphery of the end of the bushing.

4. A jig conveying device, characterized in that, include: Support components; A conveying assembly, comprising two sets, the conveying assembly including a support sleeve, pulleys, a conveyor belt, and a transmission sleeve as described in any one of claims 1-3, wherein the transmission sleeve and the support sleeve are mounted on the support assembly, and each of the transmission sleeve and the support sleeve is provided with a pulley, the conveyor belt is wound around the pulley, and the two conveyor belts are arranged in parallel. The drive assembly includes a drive shaft and a drive motor, wherein the drive shaft is inserted into two of the drive sleeves, and the drive motor is mounted on the support assembly and connected to one of the drive sleeves; The drive motor is used to drive the transmission sleeve to rotate, the transmission sleeve is used to drive the pulley thereon to rotate, the transmission sleeve is also used to drive another transmission sleeve and the pulley to rotate via the transmission shaft, and the pulley is used to drive the conveyor belt to rotate to transport the fixture placed thereon.

5. The jig conveying device according to claim 4, characterized in that, Along the length of the drive shaft, a plurality of third keyways are provided at intervals on the drive shaft, and the drive shaft is connected to the drive sleeve by a key that is simultaneously inserted into the first keyway and one of the third keyways.

6. The jig conveying device according to claim 4, characterized in that, The support assembly includes a workbench and two first uprights and two second uprights mounted on the workbench. The two first uprights are arranged parallel to each other, and the two second uprights are arranged coplanarly with one of the first uprights.

7. The fixture conveying device according to claim 6, characterized in that, Both the first upright plate and the second upright plate include a base with a first elongated hole and are mounted on the workbench by a threaded connector inserted into the first elongated hole; the first upright plate and the second upright plate can also adjust the distance between the two first upright plates and the two second upright plates by adjusting the position of the threaded connector in the first elongated hole. And / or, the first upright plate is provided with a through hole, the transmission sleeve is inserted into the through hole, and the transmission sleeve is fitted with a shaft elastic retaining ring on both sides of the through hole; And / or, the end of the support sleeve is provided with a connecting flange, and the support sleeve is installed to the second upright plate through the connecting flange; And / or, the conveying assembly further includes a guide idler wheel and a tensioning pulley mounted on the second vertical plate, and the tensioning pulley is position-adjustable on the second vertical plate, and the conveyor belt is wound around the tensioning pulley after being guided by the guide idler wheel.

8. The jig conveying device according to claim 6, characterized in that, The drive assembly further includes a drive wheel, a driven wheel, and a transmission belt. The drive wheel is connected to the drive motor, the driven wheel is fitted into a transmission sleeve, and the transmission belt is wound around the drive wheel and the driven wheel.

9. The fixture conveying device according to claim 8, characterized in that, The first upright plate is provided with a second elongated vertical hole, and the drive motor is installed in the second elongated hole by threaded fasteners.

10. The jig conveying device according to claim 6, characterized in that, A transition bearing is also provided on the side of the two second upright plates opposite to the first upright plate, the transition bearing being used to assist in supporting the fixture.

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