A chain transmission device

Abstract

The present invention provides a chain transmission device, which relates to the field of coal seam mining equipment with large inclination or steep inclination. The chain transmission device comprises a base, a sprocket is installed on the base, a chain is wound around the sprocket, and a traction member is fixed on the chain; the base is provided with a limit groove, the limit groove limits the traction member therein, and under the drive of the driving member, the traction member runs along the limit groove; the chain transmission device also comprises at least one group of barb assemblies, the barb assembly comprises barbs, the base is further provided with a slot, the barbs are movably inserted into the slot; the barbs are provided with a guide surface and a limit surface, when the traction member passes through the barbs, the guide surface is retracted into the slot under the pressure of the traction member, and after the traction member passes through the barbs, the guide surface extends out of the slot; the limit surface is used to limit the reverse operation of the traction member. In the chain transmission device, the barbs can effectively reduce the impact force of the traction member and the chain after the chain is broken, thereby effectively avoiding the situation where the traction member and the chain are thrown out of the limit groove to cause damage to equipment and personnel, greatly reducing safety hazards.

Description

Technical Field

[0001] The invention relates to the technical field of large-angle or steep-inclined coal seam mining equipment, and in particular to a chain transmission device. Background Art

[0002] The mining of steeply inclined or steeply inclined coal seams is difficult, and the arrangement of mining equipment is one of the difficulties. In the prior art, chain transmission devices such as scraper conveyors are arranged obliquely on the coal mining working face of steeply inclined or steeply inclined coal seams. The driving part drives the traction part to operate along the limit groove on the base through the sprocket and chain. The limit groove can limit the traction part from leaving the base in a direction perpendicular to the chain. However, when the chain breaks and the driving part stops driving in time, under the action of inertia or gravity, the impact force of the chain and the traction part arranged thereon will be relatively large, and it is easy to be thrown out of the limit groove, causing damage to equipment and personnel, and posing a great safety hazard. Summary of the invention

[0003] The purpose of the present invention is to provide a chain transmission device to solve the technical problem in the prior art that when the chain of the inclined chain transmission device breaks, the impact force of the chain and the traction parts arranged thereon is relatively large, and it is easy to be thrown out of the limit groove, causing damage to equipment and personnel, and posing a great safety hazard.

[0004] The chain transmission device provided by the present invention comprises a base, a driving member, a sprocket, a chain and a traction member, the sprocket is installed on the base, the chain is wound around the sprocket, and the traction member is fixedly arranged on the chain; the base is provided with a limiting groove, the limiting groove limits the traction member therein, and under the drive of the driving member, the traction member runs along the limiting groove; the chain transmission device also includes at least one group of barb assemblies, the barb assembly includes barbs, the base is also provided with a slot, and the barb is movably inserted in the slot; the barb is provided with a guiding surface and a limiting surface, when the traction member passes through the barb, the guiding surface is retracted into the slot under the squeezing of the traction member, and after the traction member passes through the barb, the guiding surface extends out of the slot; the limiting surface is used to limit the reverse operation of the traction member.

[0005] Furthermore, the slot is arranged on the bearing surface of the base.

[0006] Furthermore, the barb includes a main body and a first limiting portion, the guide surface and the limiting surface are both arranged on the main body, and the first limiting portion is arranged at an end of the main body away from the guide surface, for limiting the barb from detaching from the base when extending out of the slot.

[0007] Furthermore, the barb assembly also includes a reset member, which is connected to the barb, and under the action of the reset member, the guide surface and the limiting surface always have a tendency to extend out of the slot.

[0008] Furthermore, the reset member is a compression spring, one end of the compression spring is mounted on the barb, and the other end is mounted on the base, and the axial direction of the compression spring is consistent with the movement direction of the barb.

[0009] Furthermore, the barb assembly further includes a mounting shaft and a sleeve, the sleeve includes a first cylinder and a second cylinder that are connected and coaxially arranged, the inner diameter of the first cylinder is larger than the outer diameter of the compression spring, the inner diameter of the second cylinder is smaller than the inner diameter of the compression spring and larger than the outer diameter of the mounting shaft, and the end of the second cylinder away from the first cylinder is a fixed end, and the fixed end is mounted on the base or other barbs;

[0010] The installation shaft has a first end and a second end along its axial direction, the first end is fixedly mounted on the barb, the compression spring is sleeved outside the installation shaft, and the second end passes through the first cylinder and is inserted into the second cylinder.

[0011] Furthermore, a mounting groove is provided at one end of the barb away from the guide surface, the first end and the end of the compression spring corresponding to the first end are both located in the mounting groove, and the first end is fixedly connected to the groove wall of the mounting groove.

[0012] Furthermore, the first end is provided with a second limiting portion, and the second limiting portion is used to limit the compression spring from being separated from the mounting shaft from the first end.

[0013] Further, the barb assembly includes a single barb assembly and a double barb assembly, the single barb assembly includes one barb, the sleeve is mounted on the base, and the maximum distance between the end face of the second end and the end face of the fixed end is not less than the maximum height of the barb extending out of the slot;

[0014] The double barb assembly includes two barbs arranged back to back, and the mounting grooves of the two barbs are coaxially arranged, the sleeve is installed on one of the barbs and is coaxially arranged with the mounting groove, and the maximum distance between the end face of the second end and the bottom of the corresponding mounting groove is not less than twice the maximum height of the barb extending out of the slot.

[0015] Furthermore, the chain transmission device includes a plurality of groups of the barb assemblies, and the minimum spacing between adjacent barbs is greater than the dimension of the traction member along the running direction.

[0016] The chain transmission device provided by the present invention can produce the following beneficial effects:

[0017] The chain transmission device provided by the present invention is suitable for inclined arrangement to mine coal seams with large dip angles or steep inclinations. The base of the chain transmission device is provided with a sprocket and barbs. Under the drive of the driving member, the sprocket drives the chain wound thereon to operate, and the chain drives the traction member arranged thereon to operate, and the traction member is also arranged in the limiting groove of the base. When the traction member contacts the barb, the traction member generates pressure on the guide surface of the barb and squeezes the barb inward, so that the barb is retracted into the slot of the base, so that it passes through the barb smoothly and continues to move; and when the traction member passes through the barb, the barb extends out of the slot again.

[0018] When the chain breaks and the driving part stops driving in time, if the chain and the traction part slide down along the limit groove under the action of gravity, if the traction part on the upper chain encounters the limit surface, the limit surface will directly block the traction part from sliding down; if the traction part on the lower chain encounters the guide surface, because the traction part needs to press the barb into the slot, the barb will slow down the sliding of the traction part, or even directly force the traction part to stop moving. That is, no matter whether the barb is located on the upward part or the downward part of the base, it can effectively reduce the impact force of the traction part and the chain being thrown out of the limit groove after the chain breaks, thereby effectively avoiding the situation where the traction part and the chain are thrown out of the limit groove to cause damage to equipment and personnel, greatly reducing safety hazards.

[0019] In addition, regardless of whether the chain breaks, when the chain loses power, if the traction member and the chain continue to move forward due to inertia, the traction member and the chain will slowly stop moving because they need to overcome the resistance of the barbs to continue moving. That is, the guide surface can play a buffering role, thereby reducing the impact and damage to various components caused by the sudden stop. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A simplified structural schematic diagram of the chain transmission device provided by the present invention in a usage scenario;

[0022] Figure 2 One of the partial structural cross-sectional views of the chain transmission device provided by the present invention;

[0023] Figure 3 The second partial structural cross-sectional view of the chain transmission device provided by the present invention;

[0024] Figure 4 for Figure 1 AA section view;

[0025] Figure 5 A front view of a barb of the barb assembly provided by the present invention;

[0026] Figure 6 A right side view of a barb of the barb assembly provided by the present invention;

[0027] Figure 7 A top view of a barb of the barb assembly provided by the present invention;

[0028] Figure 8 A front view of the mounting shaft of the barb assembly provided by the present invention;

[0029] Fig. 9 A top view of the mounting shaft of the barb assembly provided by the present invention;

[0030] Fig.10 A front view of a sleeve of a barb assembly provided by the present invention;

[0031] Fig.11 A top view of a sleeve of a barb assembly provided by the present invention.

[0032] Description of reference numerals:

[0033] 100-base; 110-limiting groove; 120-slot; 200-chain; 300-traction piece;

[0034] 400-barb; 410-main body; 411-guide surface; 412-limiting surface; 413-installation groove; 420-first limiting portion;

[0035] 500-compression spring;

[0036] 600-installation shaft; 610-shaft body; 620-second limiting portion;

[0037] 700 - sleeve; 710 - first cylinder; 720 - second cylinder. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] This embodiment provides a chain transmission device, such as Figures 1 to 7As shown, the chain transmission device includes a base 100, a driving member, a sprocket, a chain 200 and a traction member 300, the sprocket is installed on the base 100, the chain 200 is wound around the sprocket, and the traction member 300 is fixedly arranged on the chain 200; the base 100 is provided with a limiting groove 110, the limiting groove 110 limits the traction member 300 therein, and under the drive of the driving member, the traction member 300 runs along the limiting groove 110; the chain transmission device also includes at least one set of barb components, the barbs The component includes a barb 400, and the base 100 is also provided with a slot 120, and the barb 400 is movably inserted into the slot 120; the barb 400 is provided with a guide surface 411 and a limit surface 412, when the traction member 300 passes through the barb 400, the guide surface 411 is retracted into the slot 120 under the squeezing of the traction member 300, and after the traction member 300 passes through the barb 400, the guide surface 411 extends out of the slot 120; the limit surface 412 is used to limit the reverse operation of the traction member 300.

[0040] The chain transmission device provided in this embodiment is suitable for inclined arrangement to mine coal seams with large dip angles or steep dips. The base 100 of the chain transmission device is provided with a sprocket and a barb 400. Under the drive of the driving member, the sprocket drives the chain 200 wound thereon to operate, and the chain 200 in turn drives the traction member 300 arranged thereon to operate, and the traction member 300 is also arranged in the limiting groove 110 of the base 100. When the traction member 300 contacts the barb 400, the traction member 300 generates pressure on the guide surface 411 of the barb 400, presses the barb 400 inward, and makes the barb 400 retract into the slot 120 of the base 100, so as to smoothly pass through the barb 400 and continue to move; and when the traction member 300 passes through the barb 400, the barb 400 extends out of the slot 120 again.

[0041] When the chain 200 breaks and the driving member stops driving in time, if the chain 200 and the traction member 300 slide down along the limiting groove 110 under the action of gravity, if the traction member 300 on the upper chain 200 encounters the limiting surface 412, the limiting surface 412 will directly block the traction member 300 from sliding down; if the traction member 300 on the lower chain 200 encounters the guiding surface 411, because the traction member 300 needs to press the barb 400 into the slot 120, the barb 400 will slow down the sliding of the traction member 300, or even directly force the traction member 300 to stop moving, that is, no matter whether the barb 400 is located at the upward part or the downward part of the base 100, it can effectively reduce the impact force of the traction member 300 and the chain 200 being thrown out of the limiting groove 110 after the chain is broken, thereby effectively avoiding the traction member 300 and the chain 200 being thrown out of the limiting groove 110 to cause damage to equipment and personnel, thereby greatly reducing safety hazards.

[0042] In addition, regardless of whether the chain breaks, when the chain 200 loses power, if the traction member 300 and the chain 200 continue to move forward due to inertia, the traction member 300 and the chain 200 need to overcome the resistance of the barbs 400 to continue moving forward, so the traction member 300 and the chain 200 will slowly stop moving, that is, the guide surface 411 can play a buffering role, thereby reducing the impact and damage to various components caused by the sudden stop.

[0043] Specifically, in this embodiment, the slot 120 is arranged on the bearing surface of the base 100. If the chain transmission device is a scraper conveyor, the "bearing surface" is the surface on which the coal is carried. In this arrangement, the slot 120 is arranged on the inner side of the chain 200 and the traction member 300, and the space occupied is small. However, it should be noted that in other embodiments of the present application, the slot 120 is not limited to being arranged on the bearing surface of the base 100, but can also be arranged on the non-bearing surface of the base 100. For example, the slot 120 is arranged on the base 100 but is located on both sides of the traction member 300 along the running direction. In this arrangement, the barb 400 can also be pressed into the slot 120 by the traction member 300 when the traction member 300 passes, so that the traction member 300 passes smoothly, and can also reduce the impact force of the traction member 300 and the chain 200 when the chain is broken, or buffer the sudden stop of the traction member 300 and the chain 200 when the machine is stopped.

[0044] Specifically, in this embodiment, if the chain transmission device is a scraper conveyor, the traction member 300 is a scraper. In addition, the traction member 300 can also be a mining machine arm that runs with the chain 200, etc.

[0045] Specifically, in this embodiment, Figure 1 , Figure 3 and Figure 5 As shown, the guide surface 411 is an inclined plane, however, in other embodiments of the present application, the guide surface 411 may also be a curved surface. As long as the traction member 300 can apply pressure to the barb 400 through it and it facilitates the passage of the traction member 300, the present application may not limit the specific shape of the guide surface 411.

[0046] Specifically, in this embodiment, Figures 1 to 7 As shown, the barb 400 includes a main body 410 and a first limiting portion 420, the guide surface 411 and the limiting surface 412 are both arranged on the main body 410, and the first limiting portion 420 is arranged at an end of the main body 410 away from the guide surface 411, for limiting the barb 400 from detaching from the base 100 when extending out of the slot 120.

[0047] More specifically, in this embodiment, the first limiting portion 420 is a limiting platform disposed on the outer peripheral surface of one end of the main body 410 away from the guide surface 411. In this way, the first limiting portion 420 has a high structural strength, is not easily damaged in a collision with the base 100, and has a reliable limiting effect. Of course, in other embodiments of the present application, the limiting platform is not limited to the above-mentioned setting form. For example, the limiting platform can also be disposed only on two sides or three sides of the main body 410, as long as it can play a limiting role on the barb 400.

[0048] Specifically, in this embodiment, the barb assembly further includes a reset member, which is connected to the barb 400, and under the action of the reset member, the guide surface 411 and the limit surface 412 always have a tendency to extend out of the slot 120. Under this arrangement, when the chain transmission device is not running and the traction member 300 is not pressed on the barb 400, the reset member keeps the barb 400 extending out of the slot 120, and when the traction member 300 passes through the barb 400 driven by the chain 200, the traction member 300 overcomes the action of the reset member and gradually presses the barb 400 into the slot 120; and when the traction member 300 passes smoothly, the reset member pushes the barb 400 out of the slot 120 to timely block the traction member 300 when the traction member 300 runs in the reverse direction.

[0049] Specifically, in this embodiment, Figures 1 to 4 As shown, the reset member is a compression spring 500, one end of the compression spring 500 is mounted on the barb 400, and the other end is mounted on the base 100, and the axial direction of the compression spring 500 is consistent with the movement direction of the barb 400. The compression spring 500 is easy to obtain, low in cost, and does not have the problem of material aging. Of course, it should be noted that in other embodiments of the present application, the reset member is not limited to the compression spring 500. For example, the reset member can also be a rubber member. As long as it can keep the barb 400 extending out of the slot 120 when the traction member 300 does not press down the barb 400, and make the barb 400 extend out of the slot 120 again in time after the traction member 300 passes smoothly, the present application does not limit the specific structural form of the reset member.

[0050] Specifically, in this embodiment, Figures 1 to 4 as well as Figures 8 to 11As shown, the barb assembly also includes a mounting shaft 600 and a sleeve 700, the sleeve 700 includes a first cylinder 710 and a second cylinder 720 that are connected and coaxially arranged, the inner diameter of the first cylinder 710 is larger than the outer diameter of the compression spring 500, the inner diameter of the second cylinder 720 is smaller than the inner diameter of the compression spring 500 and larger than the outer diameter of the mounting shaft 600, the end of the second cylinder 720 away from the first cylinder 710 is a fixed end, and the fixed end is installed on the base 100 or other barbs 400; the mounting shaft 600 has a first end and a second end along its axial direction, the first end is fixedly installed on the barb 400, the compression spring 500 is sleeved on the outside of the mounting shaft 600, and the second end passes through the first cylinder 710 and is inserted into the second cylinder 720. In this arrangement, the installation shaft 600 limits and guides the compression spring 500, and the compression spring 500 is not easily twisted, so that the expansion and contraction direction of the compression spring 500 is consistent with the movement direction of the barb 400, and the barb 400 is effectively prevented from getting stuck in the slot 120. The first cylinder 710 of the sleeve 700 accommodates and limits the end of the compression spring 500 away from the barb 400, and the second cylinder 720 provides a movement space for the reciprocating movement of the installation shaft 600, so that the barb 400 can be smoothly retracted into the slot 120.

[0051] It should be noted here that in other embodiments of the present application, the sleeve 700 may not be provided, and a receiving groove may be directly provided on the base 100, wherein the inner diameter of the receiving groove is smaller than the inner diameter of the compression spring 500 and larger than the outer diameter of the installation shaft 600 to accommodate the end of the installation shaft 600 away from the barb 400.

[0052] Specifically, in this embodiment, Figure 1 , Figure 3 as well as Figures 5 to 7 As shown, the end of the barb 400 away from the guide surface 411 is also provided with a mounting groove 413, the first end of the mounting shaft 600 and the end of the compression spring 500 corresponding to the first end are both located in the mounting groove 413, and the first end is fixedly connected to the groove wall of the mounting groove 413. In this arrangement, the mounting groove 413 accommodates the first end of the mounting shaft 600 and the end of the compression spring 500 away from the sleeve 700.

[0053] Specifically, in this embodiment, Figure 1 , Figure 3 , Figure 8 and Fig. 9As shown, the first end is provided with a second limiting portion 620, and the second limiting portion 620 is used to limit the compression spring 500 from being separated from the installation shaft 600 from the first end. In this arrangement, the second limiting portion 620 limits the compression spring 500, and the compression spring 500 applies pressure to the second limiting portion 620, so that the installation shaft 600 abuts against the bottom of the installation groove 413, so that even if the installation shaft 600 is not fixedly connected to the barb 400, it will not fall out of the installation groove 413.

[0054] Specifically, in this embodiment, the barb assembly may include a single barb assembly and a double barb assembly, the single barb assembly includes a barb 400, the sleeve 700 is installed on the base 100, and the maximum distance between the end surface of the second end of the mounting shaft 600 and the end surface of the fixed end of the second cylinder 720 is not less than the maximum height of the barb 400 extending out of the slot 120; Figure 1 As shown, the double barb assembly includes two barbs 400 arranged in opposite directions, and the mounting grooves 413 of the two barbs 400 are coaxially arranged, the sleeve 700 is installed on one of the barbs 400 and is coaxially arranged with the mounting groove 413, and the maximum distance between the end surface of the second end of the mounting shaft 600 and the bottom of the corresponding mounting groove 413 is not less than twice the maximum height of the barb 400 extending out of the slot 120. Among them, the barbs 400 of the single barb assembly are preferably arranged on the bearing surface of the base 100; and the number of barbs 400 in the double barb assembly is large, so the buffering and protection effects are better.

[0055] Specifically, in this embodiment, the chain transmission device may include multiple groups of barb assemblies, and the minimum spacing between adjacent barbs 400 is greater than the dimension of the traction member 300 along the running direction. In this arrangement, multiple barb assemblies can implement segmented protection and dispersed protection for the chain 200 and the traction member 300, and can more quickly prevent the chain 200 from sliding down when a chain break occurs, and can also effectively prevent a barb 400 from being damaged by excessive impact and stress concentration, which is safer for both equipment and personnel, as well as the device itself.

[0056] Finally, it should be noted that, in this article, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to the embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A chain transmission device, characterized in that: The invention comprises a base (100), a driving member, a sprocket, a chain (200) and a traction member (300), wherein the sprocket is mounted on the base (100), the chain (200) is wound around the sprocket, and the traction member (300) is fixedly arranged on the chain (200); the base (100) is provided with a limiting groove (110), the limiting groove (110) limits the traction member (300) therein, and under the drive of the driving member, the traction member (300) runs along the limiting groove (110); The chain transmission device further comprises at least one group of barb assemblies, wherein the barb assembly comprises barbs (400), and the base (100) is further provided with a slot (120), wherein the barbs (400) are movably inserted into the slot (120); the barbs (400) are provided with guide surfaces (411) and limiting surfaces (412); when the traction member (300) passes through the barbs (400), the guide surfaces (411) are retracted into the slot (120) under the pressure of the traction member (300); after the traction member (300) passes through the barbs (400), the guide surfaces (411) extend out of the slot (120); and the limiting surfaces (412) are used to limit the reverse operation of the traction member (300).

2. The chain transmission device according to claim 1, characterized in that: The slot (120) is arranged on the bearing surface of the base (100).

3. The chain transmission device according to claim 1, characterized in that: The barb (400) comprises a main body (410) and a first limiting portion (420), the guide surface (411) and the limiting surface (412) are both arranged on the main body (410), and the first limiting portion (420) is arranged at an end of the main body (410) away from the guide surface (411), and is used to limit the barb (400) from detaching from the base (100) when extending out of the slot (120).

4. The chain transmission device according to any one of claims 1 to 3, characterized in that: The barb assembly further comprises a reset member, which is connected to the barb (400), and under the action of the reset member, the guide surface (411) and the limit surface (412) always have a tendency to extend out of the slot (120).

5. The chain transmission device according to claim 4, characterized in that: The reset member is a compression spring (500), one end of the compression spring (500) is mounted on the barb (400), and the other end is mounted on the base (100), and the axial direction of the compression spring (500) is consistent with the movement direction of the barb (400).

6. The chain transmission device according to claim 5, characterized in that: The barb assembly further comprises a mounting shaft (600) and a sleeve (700), wherein the sleeve (700) comprises a first cylinder (710) and a second cylinder (720) which are connected and coaxially arranged, wherein the inner diameter of the first cylinder (710) is greater than the outer diameter of the compression spring (500), the inner diameter of the second cylinder (720) is smaller than the inner diameter of the compression spring (500) and greater than the outer diameter of the mounting shaft (600), and the end of the second cylinder (720) away from the first cylinder (710) is a fixed end, and the fixed end is mounted on the base (100) or other barbs (400); The installation shaft (600) has a first end and a second end along its axial direction, the first end is fixedly mounted on the barb (400), the compression spring (500) is sleeved outside the installation shaft (600), and the second end passes through the first cylinder (710) and is inserted into the second cylinder (720).

7. The chain transmission device according to claim 6, characterized in that: An installation groove (413) is also provided at one end of the barb (400) away from the guide surface (411), the first end and the end of the compression spring (500) corresponding to the first end are both located in the installation groove (413), and the first end is fixedly connected to the groove wall of the installation groove (413).

8. The chain transmission device according to claim 7, characterized in that: The first end is provided with a second limiting portion (620), and the second limiting portion (620) is used to limit the compression spring (500) from being separated from the installation shaft (600) from the first end.

9. The chain transmission device according to claim 6, characterized in that: The barb assembly comprises a single barb assembly and a double barb assembly, the single barb assembly comprises one barb (400), the sleeve (700) is mounted on the base (100), and the maximum distance between the end surface of the second end and the end surface of the fixed end is not less than the maximum height of the barb (400) extending out of the slot (120); The double barb assembly comprises two barbs (400) arranged in back-to-back relation, and the mounting grooves (413) of the two barbs (400) are coaxially arranged, the sleeve (700) is installed on one of the barbs (400) and is coaxially arranged with the mounting groove (413), and the maximum distance between the end face of the second end and the bottom of the corresponding mounting groove (413) is not less than twice the maximum height of the barb (400) extending out of the slot (120).

10. The chain transmission device according to claim 1, characterized in that: The chain transmission device comprises a plurality of groups of barb assemblies, and the minimum spacing between adjacent barbs (400) is greater than the dimension of the traction member (300) along the running direction.

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