Chain wheel structure for coal mine scraper conveyor

Abstract

The invention provides a chain wheel structure for a coal mine scraper conveyor, and relates to the technical field of coal mine conveying, the chain wheel structure comprises a cylinder, the upper end and the lower end of the cylinder are provided with cavities in a penetrating manner, the middle of each cavity is provided with a shaft sleeve, and the shaft sleeves are fixedly connected with the side walls of the cavities through a plurality of fixing plates; a plurality of inserting openings evenly penetrate through the side wall of the shaft sleeve in the circumferential direction, a plurality of first mounting openings evenly penetrate through the side end of the cylinder in the circumferential direction, the first mounting openings are connected with a plurality of quick release mechanisms in a one-to-one correspondence mode, the quick release mechanisms are fixedly connected with a plurality of inserting blocks in a one-to-one correspondence mode, and fixing holes penetrate through the upper sections and the lower sections of the inserting blocks. The ends, away from the inserting blocks, of the quick release mechanisms are detachably connected with the meshing blocks, a plurality of mounting holes are evenly distributed in the upper side and the lower side of the side end of the barrel in the circumferential direction correspondingly, and the mounting holes in the upper side and the lower side are connected with locking mechanisms on cover plates distributed up and down correspondingly. The locking mechanism is connected with the fixing holes in the inserting blocks.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine transportation, in particular to a sprocket wheel structure for a coal mine scraper conveyor. Background Art

[0002] Scraper conveyors are widely used as transportation tools for underground coal mining due to their large transportation capacity. The sprocket assembly of coal mine conveyors is a key transmission component of coal mine conveyors. Through the meshing of the driving sprocket assembly and the chain ring, the rotation torque of the driving motor is converted into a linear traction force and transmitted to the scraper chain. The scraper chain moves in a closed circle around the driving sprocket to transport the raw coal on the chain path of the scraper conveyor from the tail to the head. During the operation of the sprocket assembly, the sprocket shaft drives the sprocket to rotate. When the existing sprocket meshing tooth block is driven by force for a long time, friction and wear will occur at the meshing part of the meshing tooth block and the chain ring. If it continues to be used, it is easy to cause the sprocket itself to slip and cannot be used to drive the feeding. Reference CN202222700862 - A sprocket shaft for a coal mine scraper conveyor, which discloses that multiple groups of meshing tooth blocks on the outer wall of the socket are first plugged into the inside of the slot by means of a plug-in and threaded assembly and tightened by a limit plug. The disassembly is similar. At this time, the meshing tooth blocks that are damaged individually on the outside of the socket can be disassembled and replaced without completely replacing the sprocket shaft body, thereby achieving the effect of saving economic costs. However, the threaded assembly and tightening method requires the use of special tools, such as a screwdriver for assembly. The assembly process is time-consuming and labor-intensive, and if the threaded holes on the socket for threaded assembly are stripped when the sprocket assembly is running for a long time, it is not only difficult to achieve the effect of threaded assembly and tightening, but the socket must also be replaced as a whole, increasing the cost. Summary of the invention

[0003] The present invention provides a sprocket structure for a coal mine scraper conveyor, which is used to solve the technical problem that the above-mentioned threaded assembly and fastening method requires the use of special tools, such as a screwdriver for assembly, and the assembly process is time-consuming and labor-intensive. In addition, when the sprocket assembly is running for a long time, if the threaded holes for threaded assembly on the socket are stripped, not only is it difficult to achieve the threaded assembly and fastening effect, but the socket must also be replaced as a whole, which increases the cost.

[0004] In order to solve the above technical problems, the present invention discloses a sprocket structure for a coal mine scraper conveyor, comprising a cylinder, cavities are penetrated at the upper and lower ends of the cylinder, a shaft sleeve is provided in the middle of the cavity, and a plurality of fixing plates are evenly arranged on the outer circumference of the shaft sleeve, and the plurality of fixing plates are fixedly connected to the side wall of the cavity, an axial hole is penetrated at the upper and lower ends of the shaft sleeve, a plurality of sockets are evenly penetrated on the side wall of the shaft sleeve in the circumference, the plurality of sockets and the plurality of fixing plates are arranged at intervals, the axial hole is communicated with the plurality of sockets, the axial hole cooperates with the sprocket shaft, the sprocket shaft is evenly arranged with a plurality of connecting grooves in the circumference, a plurality of mounting openings are evenly penetrated on the side end of the cylinder in the circumference, the plurality of mounting openings are communicated with the cavity, and the plurality of fixing plates are arranged at intervals. The first installation opening is connected to a plurality of quick-release mechanisms in a one-to-one correspondence, and the plurality of quick-release mechanisms are fixedly connected to a plurality of plug-in blocks in a one-to-one correspondence, and fixing holes are penetrated through the upper and lower sections of the plug-in blocks, and the number of the plurality of quick-release mechanisms, the plurality of plug-in blocks, the plurality of sockets and the plurality of connecting grooves is the same, and the plurality of plug-in blocks are connected to the plurality of connecting grooves in a one-to-one correspondence through the plurality of sockets, and the end of the quick-release mechanism away from the plug-in block is detachably connected to the engaging block, and a plurality of installation holes are evenly distributed circumferentially on the upper and lower sides of the side end of the cylinder, and the plurality of installation holes on the upper and lower sides are respectively connected to the locking mechanisms on the upper and lower distributed cover plates, and the locking mechanisms are connected to the fixing holes on the plurality of plug-in blocks, and the upper and lower ends of the cover plate are penetrated by shaft holes 2 for the sprocket shaft to pass through.

[0005] Preferably, the plurality of mounting holes on the upper side are connected with the upper sides of the plurality of mounting ports in a one-to-one correspondence, and the plurality of mounting holes on the lower side are connected with the lower sides of the plurality of mounting ports one in a one-to-one correspondence. The mounting holes include mounting port two and mounting port three which are connected and arranged in a communication manner. The mounting port two is arranged on the side away from the shaft sleeve, and the mounting port three is arranged on the side close to the shaft sleeve. A limit plate is fixedly provided on one end of the mounting port two close to the cover plate.

[0006] Preferably, the locking mechanism includes a rotating ring 1 fixedly arranged at one end of the cover plate close to the cylinder body, a plurality of rotating grooves 1 are evenly arranged on the outer ring of the rotating ring 1 in a circumferential direction, the plurality of rotating grooves 1 are rotatably connected with a plurality of rotating rods in a one-to-one correspondence, the plurality of rotating rods are rotatably connected with rotating grooves 2 on a plurality of locking blocks in a one-to-one correspondence, the rotating grooves 2 are arranged on a side of the locking block close to the rotating ring 1, the plurality of locking blocks are slidably connected with the horizontal sections of the plurality of fixed blocks 1 in a one-to-one correspondence, a spring 1 is fixed between the locking block and the vertical section of the fixed block 1, the plurality of fixed blocks are evenly arranged at one end of the cover plate close to the cylinder body in a circumferential direction, the plurality of locking blocks are matched with a plurality of mounting openings 2 in a one-to-one correspondence, the inclined sections of the plurality of locking blocks are in one-to-one contact with a plurality of limit plates, and the plurality of rotating rods are matched with a plurality of mounting openings 3 in a one-to-one correspondence.

[0007] Preferably, the locking mechanism also includes a rotating ring 2 rotatably arranged at one end of the cover plate close to the cylinder, the inner ring diameter of the rotating ring 1 is larger than the outer ring diameter of the rotating ring 2, the inner ring diameter of the rotating ring 2 is larger than the diameter of the shaft hole 2, and the rotating ring 2 is evenly distributed with a number of fixed blocks 3 in the circumferential direction, and the fixed holes on the fixed blocks 3 and the plug blocks correspond one to one.

[0008] Preferably, the quick-release mechanism includes a shell, the shell corresponds to the mounting port 1, a movable cavity is provided at the front end of the shell, a fixing groove 1 and two fixing grooves 2 are provided at the end of the shell away from the sleeve, the two fixing grooves 2 are symmetrically arranged on the upper and lower sides of the shell, the fixing groove 1 is arranged in the middle of the shell, the upper and lower ends of the fixing groove 1 and the front and rear sides and the front and rear sides of the two fixing grooves 2 are respectively provided with a sliding port, the front and rear ends of the shell are respectively provided with a limiting port on the upper and lower sides, the limiting port is connected with two adjacent sliding ports on the fixing groove 1 and the fixing groove 2, the upper and lower ends of the shell are symmetrically provided with movable grooves, the front end of the movable groove is connected with the movable port, the movable port is arranged on the upper and lower sides of the front end of the shell, the front and rear sides of the movable groove are symmetrically connected with connecting holes, and the movable groove is connected with the limiting port through the connecting hole, the upper and lower sides of the end of the shell close to the sleeve are symmetrically provided with through holes, the through holes are connected with the grooves on the substrate, and the end of the substrate away from the groove is fixedly connected to the plug.

[0009] Preferably, support blocks 1 are symmetrically provided on the upper and lower sides of the movable cavity, guide grooves are symmetrically provided on the upper and lower sides of the support block 1, a guide opening is provided at the front end of the side of the support block 1 close to the sleeve, the guide groove and the guide opening are connected, and an installation opening is provided at the front end of the side of the support block 1 away from the sleeve.

[0010] Preferably, the engaging block includes an engaging block 1 and two engaging blocks 2, the engaging block 1 passes through a fixed groove 1 and is fixedly connected to a slider 1, the two engaging blocks 2 pass through two fixed grooves 2 respectively and are fixedly connected to two sliders 2 one by one, the slider 1 and the two sliders 2 are provided with guide protrusions at one end close to the supporting block 1, the guide protrusions are slidably connected to the guide protrusion grooves, and support grooves are symmetrically provided on the front and rear sides of the ends of the engaging block 2 and the engaging block 1 close to each other.

[0011] Preferably, the guide openings on the support block 1 on the upper and lower sides correspond to the guide blocks on the upper and lower sides one by one, the guide blocks on the upper and lower sides are respectively fixedly connected to the baffles on the upper and lower sides, the baffles on the upper and lower sides cooperate with the front end of the movable cavity, the upper and lower sides of the guide block are symmetrically provided with guide convex holes, the guide convex holes are correspondingly connected with the guide convex grooves, the upper and lower sides of the end of the guide block close to the support block 1 are symmetrically provided with matching openings, the matching openings are connected with the guide convex holes, the matching openings on the upper and lower sides correspond to the upper and lower ends of the guide opening, push blocks are fixedly provided on the slider 1 and the two sliders 2, and the push blocks and the guide convex holes are correspondingly arranged.

[0012] Preferably, a connecting block is slidably provided in the groove on the base plate, a second spring is fixedly provided between the connecting block and the groove, and clamping blocks are symmetrically provided on the upper and lower sides of one end of the connecting block away from the second spring, and the clamping blocks pass through the through hole and correspond to the guide convex hole.

[0013] Preferably, racks 1 are symmetrically provided on the upper and lower sides of the baffle, and the racks 1 on the upper and lower sides are connected one-to-one with the unlocking mechanisms in the support blocks 1 on the upper and lower sides, and the unlocking mechanism includes a rotating shaft rotatably arranged in the installation opening, the rotating shaft is fixedly connected with the gear, the front side of the gear is meshed with the rack 1 correspondingly, the rear side of the gear is meshed with the rack 2 correspondingly, the inclined section of the rack 1 is in contact with the slider 1 correspondingly, the inclined section of the rack 2 is in contact with the slider 2 correspondingly, the vertical section of the rack 2 is slidably connected with the rear end of the installation opening, and a spring 3 is fixedly provided between the rack 2 and the fixed block 2, and the fixed block 2 is fixedly arranged on the installation opening. In the installation mouth, the vertical section of the rack one corresponds to the movable mouth, and the vertical section of the rack one contacts with the movable plate in the movable groove, a number of springs four are fixedly provided between the movable plate and the movable groove, connecting rods are symmetrically provided on the front and rear sides of the movable plate, the connecting rods pass through the connecting holes and correspond to the limiting holes, the limiting holes are arranged on the limiting block, the limiting block corresponds to the limiting mouth, one end of the limiting block close to the meshing block contacts with the sliding block, the sliding block corresponds to the sliding mouth, one end of the sliding block away from the sliding mouth is fixedly connected to the supporting block two, and the supporting block two corresponds to the supporting groove on the meshing block.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The quick-release mechanism and the locking mechanism are set up to replace the threaded assembly connection method, making the assembly process of the engaging block and the cylinder save time and labor, and there will be no thread slippage in the threaded hole during the threaded assembly. In addition, any engaging block that is severely worn can be replaced without replacing the entire cylinder, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the cover plate connection structure of the present invention; Figure 3 It is a schematic diagram of the cylinder structure of the present invention; Figure 4 It is a schematic diagram of the plug-in block connection structure of the present invention; Figure 5 It is a schematic diagram of the structure of the quick release mechanism of the present invention; Figure 6 An exploded view of the quick release mechanism of the present invention; Figure 7 for Figure 6 A schematic diagram of the enlarged structure of region A; Figure 8 The shell structure of the present invention is shown in FIG. Figure 1 ; Fig. 9 It is a schematic diagram of the baffle connection structure of the present invention; Fig.10 It is a schematic diagram of a connection structure of a support block of the present invention; Fig.11 The shell structure of the present invention is shown in FIG. Figure 2 .

[0016] In the figure: 1, cover plate; 101, rotating ring 1; 102, shaft hole 2; 103, locking block; 104, spring 1; 105, fixed block 1; 106, rotating rod; 107, rotating groove 2; 108, rotating groove 1; 109, fixed block 3; 2, cylinder; 201, installation port 1; 202, shaft sleeve; 203, socket; 204, shaft hole 1; 205, installation port 2; 206, limit plate; 207, installation port 3; 208, fixed plate; 3, shell; 301, base plate; 302, meshing block 2; 303, meshing block 1; 304, fixed groove 1; 305, fixed groove 2; 306, movable cavity; 307, baffle; 308, movable groove; 309, movable port; 310 , limit opening; 311, sliding opening; 312, through hole; 313, slider two; 314, slider one; 315, support block one; 316, installation opening; 317, rotating shaft; 318, gear; 319, fixed block two; 320, guide opening; 321, guide convex groove; 322, guide convex block; 323, rack two; 324, guide block; 325, clamping block; 326, guide convex hole; 327, matching opening; 328, rack one; 329, spring two; 330, limit hole; 331, movable plate; 332, connecting hole; 333, spring four; 334, support groove; 335, support block two; 336, sliding block; 337, limit block; 4, plug block; 401, fixed hole. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0018] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0019] The present invention provides the following embodiments: Embodiment 1: The embodiment of the present invention provides a sprocket structure for a coal mine scraper conveyor, such as Figure 1-Figure 11 As shown, it includes a cylinder 2, wherein cavities are penetrated at the upper and lower ends of the cylinder 2, a shaft sleeve 202 is provided in the middle of the cavity, and a plurality of fixing plates 208 are evenly arranged on the outer circumference of the shaft sleeve 202, and the plurality of fixing plates 208 are fixedly connected to the side wall of the cavity, an axial hole 204 is penetrated at the upper and lower ends of the shaft sleeve 202, a plurality of sockets 203 are evenly penetrated on the side wall of the shaft sleeve 202, and the plurality of sockets 203 and the plurality of fixing plates 208 are arranged at intervals, an axial hole 204 is communicated with the plurality of sockets 203, the axial hole 204 cooperates with the sprocket shaft, and the sprocket shaft is evenly arranged with a plurality of connecting grooves, and a plurality of mounting openings 201 are evenly penetrated on the side end of the cylinder 2, and the plurality of mounting openings 201 are communicated with the cavity, and the ... connected with the cavity, and the plurality of mounting openings 201 are evenly penetrated on the side end of the cylinder 2, and the plurality of mounting openings 201 are connected with the cavity, and the plurality of mounting openings 201 are evenly 01 is connected with a number of quick-release mechanisms in a one-to-one correspondence, and a number of quick-release mechanisms are fixedly connected with a number of plug-in blocks 4 in a one-to-one correspondence. The upper and lower sections of the plug-in blocks 4 are penetrated by fixing holes 401. The number of quick-release mechanisms, a number of plug-in blocks 4, a number of sockets 203 and a number of connecting grooves is the same. A number of plug-in blocks 4 are connected with a number of connecting grooves in a one-to-one correspondence through a number of sockets 203. The end of the quick-release mechanism away from the plug-in block 4 is detachably connected to the engaging block. A number of mounting holes are evenly distributed circumferentially on the upper and lower sides of the side end of the cylinder 2. The number of mounting holes on the upper and lower sides are respectively connected with the locking mechanisms on the upper and lower distributed cover plates 1. The locking mechanisms are connected to the fixing holes 401 on the plug-in blocks 4. The upper and lower ends of the cover plate 1 are penetrated by shaft holes 102 for the sprocket shaft to pass through.

[0020] The working principle of the above technical solution is: When the sprocket is matched with the sprocket shaft, first, the sprocket shaft is passed through the shaft hole 1 204, and the several connecting grooves on the sprocket shaft are connected to the several sockets 203 in a one-to-one correspondence, and then the quick release mechanism is inserted into the socket 203, so that the plug block 4 of the quick release mechanism is inserted into the connecting groove through the socket 203 to complete the positioning of the sprocket shaft. At this time, the quick release mechanism is inserted into the installation port 1 201 and matched with the installation port 1 201, and then the shaft hole 2 102 on the upper and lower cover plates 1 is matched with the sprocket shaft, and the locking mechanism on the upper and lower cover plates 1 is inserted into the installation hole, so that the upper and lower cover plates 1 are connected with the cylinder 2. In this process, the locking mechanism is connected with the fixing hole 401 on the plug block 4, so that the plug block 4 is installed with the sprocket shaft and the shaft sleeve 202 in the cylinder 2. At the same time, since the end of the quick release mechanism away from the plug block 4 is detachably connected with the meshing block, the meshing block Used to engage with the drag chain in the coal mine scraper conveyor, the engaging block can be quickly disassembled after it is severely worn and affects the engagement with the drag chain. When disassembling the engaging block, first disengage the locking mechanism from the mounting hole, then remove the cover plate 1, pull the quick-release mechanism connected to the engaging block to be replaced out of the mounting port 201, separate the engaging block to be replaced from the quick-release mechanism, and replace it with a new one. The quick-release mechanism and the locking mechanism are set to replace the threaded assembly connection method, which solves the problem of using special tools such as screwdrivers for assembly using threaded assembly, and the assembly process is time-consuming and labor-intensive. In addition, if the threaded hole for threaded assembly on the socket is slipped when the sprocket assembly is running for a long time, it is not only difficult to achieve the threaded assembly tightening effect, but also the socket needs to be replaced as a whole, which increases the cost of the technical problem.

[0021] Embodiment 2: Based on embodiment 1, Figure 1-Figure 4 As shown, the plurality of mounting holes on the upper side are connected to the upper sides of the plurality of mounting openings 201 in a one-to-one correspondence, and the plurality of mounting holes on the lower side are connected to the lower sides of the plurality of mounting openings 201 in a one-to-one correspondence. The mounting holes include a mounting opening 205 and a mounting opening 3 207 which are connected. The mounting opening 205 is arranged on a side away from the shaft sleeve 202, and the mounting opening 3 207 is arranged on a side close to the shaft sleeve 202. A stop plate 206 is fixedly provided at one end of the mounting opening 205 close to the cover plate 1. The locking mechanism includes a rotating ring 101 fixedly arranged at one end of the cover plate 1 close to the cylinder 2, a plurality of rotating grooves 108 are evenly arranged on the outer ring of the rotating ring 101, the plurality of rotating grooves 108 are rotatably connected with the plurality of rotating rods 106 in a one-to-one correspondence, the plurality of rotating rods 106 are rotatably connected with the plurality of rotating grooves 2 107 on the locking blocks 103 in a one-to-one correspondence, the rotating grooves 2 107 are arranged on one side of the locking blocks 103 close to the rotating ring 101, and the plurality of locking blocks 103 are rotatably connected with the plurality of rotating rods 106 in a one-to-one correspondence. The horizontal sections of the fixed block 105 are slidably connected one by one, a spring 104 is fixed between the locking block 103 and the vertical section of the fixed block 105, a plurality of fixed blocks 105 are evenly arranged circumferentially at one end of the cover plate 1 close to the cylinder 2, a plurality of locking blocks 103 are matched with a plurality of mounting openings 205 in a one-to-one correspondence, a plurality of inclined sections of the locking blocks 103 are in contact with a plurality of limit plates 206 in a one-to-one correspondence, and a plurality of rotating rods 106 are matched with a plurality of mounting openings 3 207 in a one-to-one correspondence; The locking mechanism also includes a rotating ring 2 rotatably arranged at one end of the cover plate 1 close to the cylinder 2, the inner ring diameter of the rotating ring 1 101 is larger than the outer ring diameter of the rotating ring 2, the inner ring diameter of the rotating ring 2 is larger than the diameter of the shaft hole 2 102, and a plurality of fixed blocks 3 109 are evenly distributed circumferentially on the rotating ring 2, and the plurality of fixed blocks 3 109 and the fixed holes 401 on the plurality of plug blocks 4 correspond one to one.

[0022] The working principle of the above technical solution is: When connecting the cover plate 1 and the cylinder 2, align the fixing holes 401 on the fixing blocks 109 and the plug blocks 4, and then move the cover plate 1 toward the cylinder 2. The cooperation between the fixing blocks 109 and the fixing holes 401 guides the movement direction of the cover plate 1 toward the cylinder 2 until the inclined section of the locking block 103 contacts the limit plate 206. Since the limit plate 206 is fixedly arranged, the locking block 103 slides along the horizontal section of the fixing block 105, and the spring 104 is compressed until the locking block 103 contacts the limit plate 206. The plate 206 is out of contact, and the fixing block 105 completely enters the installation opening 205. Under the elastic action of the spring 104, the locking block 103 returns to its original position. At this time, the horizontal section of the locking block 103 fits with the end of the limit plate 206 away from the cover plate 1, and the cover plate 1 fits with the end surface of the cylinder 2, completing the connection between the cover plate 1 and the cylinder 2. At this time, the plug block 4 is matched with the fixing hole 401. When the cover plate 1 and the cylinder 2 are disassembled, the cover plate 1 is controlled to rotate, so that the cover plate 1 drives the rotating ring 101 to rotate. Due to the rotation of the rotating ring 2 and the cover plate 1 The rotating ring 101 drives the rotating rod 106 to rotate, and the rotating rod 106 drives the locking block 103 to slide along the horizontal section of the fixing block 105 as the rotating ring 101 rotates, so that the locking block 103 is out of contact with the limit plate 206, and then the cover plate 1 is pulled outward in the direction away from the cylinder body 2, so that the cover plate 1 and the fixed block 3 109 connected thereto are out of cooperation with the fixing hole 401, and the quick release mechanism can be pulled out of the installation opening 201 at this time. The connection between the above-mentioned cover plate 1 and the cylinder 2 can be completed by simply pressing the locking mechanism into the mounting hole during installation. When the cover plate 1 is removed, it is only necessary to rotate the cover plate 1 and pull it out of the cylinder 2 to complete the removal purpose. The operation is simple and convenient, and the setting direction of the inclined section of the locking block 103 is consistent with the rotation direction of the sprocket shaft, so that when the sprocket shaft drives the cylinder 2 to rotate, the movement direction of the locking block 103 under the centrifugal action is away from the spring 104, which further improves the connection and fixing effect between the cover plate 1 and the cylinder 2.

[0023] Embodiment 3: Based on embodiment 2, Figure 1-Figure 11As shown, the quick release mechanism includes a shell 3, the shell 3 corresponds to the installation port 1 201, the front end of the shell 3 is provided with a movable cavity 306, the end of the shell 3 away from the shaft sleeve 202 is provided with a fixing groove 1 304 and two fixing grooves 2 305, the two fixing grooves 2 305 are symmetrically arranged on the upper and lower sides of the shell 3, the fixing groove 1 304 is arranged in the middle of the shell 3, the upper and lower ends of the fixing groove 1 304 and the front and rear sides of the two fixing grooves 2 305 are respectively provided with a sliding opening 311, the front and rear ends of the shell 3 are respectively provided with a limiting opening 310 on the upper and lower sides, and the limiting opening 310 and the fixing groove 1 304 are respectively provided with a limiting opening 310. 04 and the two adjacent sliding openings 311 on the fixed groove 205 are connected, the upper and lower ends of the shell 3 are symmetrically provided with movable grooves 308, the front end of the movable groove 308 is connected with the movable opening 309, the movable opening 309 is arranged on the upper and lower sides of the front end of the shell 3, the front and rear sides of the movable groove 308 are symmetrically connected with connecting holes 332, and the movable groove 308 is connected with the limit opening 310 through the connecting holes 332, the upper and lower sides of the end of the shell 3 close to the shaft sleeve 202 are symmetrically provided with through holes 312, the through holes 312 are connected with the groove on the base plate 301, and the end of the base plate 301 away from the groove is fixedly connected with the plug block 4; Support blocks 315 are symmetrically arranged on the upper and lower sides of the movable cavity 306, and guide convex grooves 321 are symmetrically arranged on the upper and lower sides of the support block 315. A guide opening 320 is arranged at the front end of the side of the support block 315 close to the shaft sleeve 202, and the guide convex groove 321 is connected to the guide opening 320. A mounting opening 316 is arranged at the front end of the side of the support block 315 away from the shaft sleeve 202; The engaging block includes an engaging block 1 303 and two engaging blocks 2 302. The engaging block 1 303 passes through a fixed groove 1 304 and is fixedly connected to a slider 1 314. The two engaging blocks 2 302 pass through two fixed grooves 2 305 and are fixedly connected to two sliders 2 313 in a one-to-one correspondence. The slider 1 314 and the two sliders 2 313 are both provided with guide protrusions 322 at one end close to the support block 1 315. The guide protrusions 322 are slidably connected to the guide protrusions 321. Support grooves 334 are symmetrically provided on the front and rear sides of the end where the engaging block 2 302 and the engaging block 1 303 are close to each other.

[0024] The working principle of the above technical solution is: The setting of the fixed groove 1 304 is used to cooperate with the meshing block 1 303, and the setting of the two fixed grooves 2 305 is used to cooperate with the meshing block 2 302. By setting the meshing blocks as the meshing block 1 303 and the two meshing blocks 2 302 respectively, after any one of the meshing block 1 303 and the two meshing blocks 2 302 is worn, they can be replaced separately, avoiding setting the meshing block as a whole, and replacing the whole when any part of the meshing block is worn, which increases the cost. By setting the support block 1 315, the meshing block is guided when it is installed or removed. Specifically, when the meshing block 1 303 and the two meshing blocks 2 302 are installed and removed, the meshing block 1 303 and the slider 1 314 connected thereto, the two meshing blocks 302 are connected to each other. The second 302 and the connected slider 2 313 can slide along the guide convex groove 321 through the guide protrusion 322, so that the matching direction between the engaging block 1 303 and the fixed groove 1 304, and the matching direction between the engaging block 2 302 and the fixed groove 2 305 are the same as the sliding direction of the guide protrusion 322, thereby having a guiding and positioning effect on the matching between the engaging block 1 303 and the fixed groove 1 304, and the matching between the engaging block 2 302 and the fixed groove 2 305. The setting of the guide port 320, after the guide protrusion 322 moves to the guide port 320, the guide protrusion 322 is disengaged from the guide convex groove 321. At this time, the guide protrusion 322 and the corresponding engaged block can be pulled forward out of the movable cavity 306, thereby completing the purpose of replacing the worn engaged block.

[0025] Embodiment 4: Based on embodiment 3, Figure 1-Figure 11 As shown, the guide openings 320 on the upper and lower support blocks 315 are matched with the guide blocks 324 on the upper and lower sides in a one-to-one correspondence, and the guide blocks 324 on the upper and lower sides are fixedly connected to the baffles 307 on the upper and lower sides respectively, and the baffles 307 on the upper and lower sides cooperate with the front end of the movable cavity 306, and the upper and lower sides of the guide block 324 are symmetrically provided with guide convex holes 326, and the guide convex holes 326 are correspondingly connected with the guide convex grooves 321, and the upper and lower sides of the end of the guide block 324 close to the support block 1 315 are symmetrically provided with matching openings 327, and the matching openings 327 are connected with the guide convex holes 326, and the matching openings 327 on the upper and lower sides are matched with the upper and lower ends of the guide opening 320, and the slider 1 314 and the two sliders 2 313 are fixedly provided with push blocks, and the push blocks are correspondingly arranged with the guide convex holes 326; A connecting block is slidably provided in the groove on the base plate 301, a second spring 329 is fixed between the connecting block and the groove, and a clamping block 325 is symmetrically provided on the upper and lower sides of one end of the connecting block away from the second spring 329, and the clamping block 325 passes through the through hole 312 and corresponds to the guide protrusion 326.

[0026] The working principle of the above technical solution is: During the process of inserting the baffle plate 307 into the movable cavity 306, the guide block 324 connected to the baffle plate 307 first enters the movable cavity 306, until the guide block 324 is inserted into the guide opening 320, the matching openings 327 on the upper and lower sides correspond to the upper and lower ends of the guide opening 320, and play a guiding role in the matching between the guide block 324 and the guide opening 320. During the process of inserting the guide block 324 into the guide opening 320, it first contacts the inclined section of the card block 325, pushing the card block 325 to move in the direction of the groove, so that the card block 325 is separated from the guide opening 320, and the spring 2 329 is compressed until the guide protrusion 326 moves to the corresponding position of the card block 325. Under the elastic action of the spring 2 329, the card block 325 passes through The through hole 312 cooperates with the guide protrusion 326. At this time, the guide block 324 and the baffle 307 connected thereto cannot move. The baffle 307 just enters the active cavity 306 and blocks it, so that the active cavity 306 forms a closed cavity, thereby preventing the external environment from affecting the support block 1 315, the guide protrusion 322, the slider 2 313 and the slider 1 314 and their corresponding connected engaging blocks in the active cavity 306, thereby affecting the connection effect between the engaging block and the shell 3, and finally causing the engaging block to shake during normal operation. After the shell 3 is inserted into the installation port 1 201 and cooperates therewith, the baffle 307 at the front end of the shell 3 fits with the front end of the installation port 1 201, which can further prevent the baffle 307 from detaching from the shell 3.

[0027] Embodiment 5: Based on embodiment 4, Figure 1-Figure 11As shown, racks 1 328 are symmetrically provided on the upper and lower sides of the baffle 307, and the racks 1 328 on the upper and lower sides are connected one-to-one with the unlocking mechanisms in the support blocks 1 315 on the upper and lower sides. The unlocking mechanism includes a rotating shaft 317 rotatably arranged in the installation opening 316, and the rotating shaft 317 is fixedly connected with the gear 318. The front side of the gear 318 is meshed with the rack 1 328, and the rear side of the gear 318 is meshed with the rack 2 323. The inclined section of the rack 1 328 is in contact with the slider 1 314, and the inclined section of the rack 2 323 is in contact with the slider 2 313. The vertical section of the rack 2 323 is slidably connected with the rear end of the installation opening 316, and a spring 3 is fixedly provided between the rack 2 323 and the fixed block 2 319, and the fixed block 2 319 is fixedly arranged in the installation opening 316. The vertical section of the rack 328 corresponds to the movable opening 309, and the vertical section of the rack 328 corresponds to the movable plate 331 in the movable groove 308. A plurality of springs 333 are fixedly arranged between the movable plate 331 and the movable groove 308. Connecting rods are symmetrically arranged on the front and rear sides of the movable plate 331. The connecting rods pass through the connecting holes 332 and correspond to the limiting holes 330. The limiting holes 330 are arranged on the limiting blocks 337. The limiting blocks 337 correspond to the limiting opening 310. One end of the limiting blocks 337 close to the meshing block contacts the sliding block 336. The sliding block 336 corresponds to the sliding opening 311. One end of the sliding block 336 away from the sliding opening 311 is fixedly connected to the supporting block 335. The supporting block 335 corresponds to the supporting groove 334 on the meshing block.

[0028] The working principle of the above technical solution is: After the baffle plate 307 is connected to the shell 3, the rack 1 328 extends into the movable opening 309 and the movable cavity 306, and the rack 1 328 connected to the baffle plate 307 is just meshed with the gear 318. During the working process of the meshing block, the meshing area of ​​the meshing block and the drag chain is prone to wear. A support groove 334 is set on the side of the meshing area of ​​the meshing block close to the shell 3, and the support groove 334 cooperates with the support block 2 335. The support block 2 335 cooperates with the sliding opening 311 through the sliding block 336. When installing the meshing block, first extend the sliding block 336 connected with the support block 2 335 into the sliding opening 311, and then insert the guide protrusion 322 corresponding to the meshing block into the guide opening 320 and move it toward the fixed groove 1 304 and the fixed groove 2 305. In this process, the guide protrusion 322 slides and cooperates with the guide protrusion 321, and finally the meshing block cooperates with the fixed groove 1 304 and the fixed groove 2 305, and the support groove The locking cam 336 is in a state of being moved in a direction opposite to the locking cam 336, and the locking cam 336 is in a state of being moved in a direction opposite to the locking cam 336. When the meshing block is replaced, if the meshing block 303 is worn and the support groove 334 on the meshing block 303 is worn to the point of being out of engagement with the support block 2 335, the meshing block 303 can move along the fixed groove 304, and the meshing block 303 is pressed to drive the guide protrusion 322 to slide along the guide protrusion groove 321 through the slider 1 314. During this process, the upper and lower ends of the slider 1 314 contact the inclined sections of the rack 1 328 on the upper and lower sides, and the slider 1 314 pushes the rack 1 328 to move away from each other, and the rack 1 328 moves away from each other. 8 can push the movable plate 331 out of the movable groove 308, and the movable plate 331 drives the connecting rod to disengage from the limiting hole 330. When the rack 1 328 drives the movable plate 331 to move, the movable plate 331 can push the inclined section of the locking block 103 in the installation opening 205 to contact, so that the locking block 103 is disengaged from the limiting plate 206, and then the cover plate 1 is pulled outward in the direction away from the cylinder 2, so that the cover plate 1 and the fixed block 3 109 connected to it are disengaged from the fixing hole 401. At this time, the shell 3 is pulled out of the installation opening 1 201, and then the disengaged The limiting block 337 corresponding to the limiting hole 330 of the connecting rod is disengaged from the limiting opening 310, so that the sliding block 336 can move along the sliding opening 311. When the sliding block 1 314 moves along with the guide protrusion 322, the push block moves along with the sliding block 1 314, which can drive the block 325 to disengage from the guide protrusion 326 until the guide protrusion 322 enters the guide opening 320. At this time, the engaging block 1 303 enters the movable cavity 306, and the push block corresponds to the matching opening 327, so that when the baffle 307 is separated from the shell 3, the matching opening 327 passes through the push block, and then the baffle 307 is removed. 07, to prevent the rack 1 328 from blocking the disassembly of the meshing block 1 303, finally pull the guide protrusion 322 and its corresponding connected slider 1 314 and the meshing block 1 303 forward out of the movable cavity 306, and then replace the new sliding block 336, the support block 2 335 and the meshing block 1 303 according to the above steps of installing the meshing block. The size of the support block 2 335 can be set according to the wear range allowed by the meshing block 1 303, and the slider 1 314 and its connected guide protrusion 322 can also keep in contact with the meshing block 1 303, and only play a role in placing and limiting; If the upper meshing block 302 is worn, the support groove 334 on the upper meshing block 302 is worn to the point of being out of engagement with the support block 335. At this time, the meshing block 302 can move along the upper fixed groove 305. The upper meshing block 302 is pressed to drive the guide protrusion 322 to slide along the guide protrusion groove 321 through the slider 313. During this process, the slider 313 on the upper side contacts the inclined section of the rack 323 in the upper support block 1 315, pushing the rack 323 to move downward. The rack 323 drives the gear 318 to rotate, and the spring 318 is retracted. The spring 3 is compressed, the gear 318 drives the rack 1 328 to move upward, and the rack 1 328 drives the upper movable plate 331 to move. During the process, the upper movable plate 331 can push the inclined section of the locking block 103 in the upper mounting opening 205 to contact, so that the locking block 103 is out of contact with the limiting plate 206, and then the upper cover plate 1 is pulled outward in the direction away from the cylinder 2, and finally the lower cover plate 1 is rotated to make the lower cover plate 1 separate from the cylinder 2, and at the same time, the upper rack 1 328 can drive the connecting rod to disengage from the limiting hole 330 through the movable plate 331. At this time, the shell 3 is pulled out of the installation opening 1 201, and then the limiting block 337 corresponding to the limiting hole 330 that has been separated from the connecting rod is separated from the limiting opening 310, so that the sliding block 336 can move along the sliding opening 311. The sliding block 2 313 is also provided with a push block. When the sliding block 2 313 moves with the guide protrusion 322, the push block can drive the card block 325 to disengage from the guide protrusion 326 until the guide protrusion 322 enters the guide opening 320. At this time, the upper engaging block 2 302 enters the active cavity 306, so that the upper baffle 307 and the shell 3 can be separated. The upper baffle plate 307 is then disassembled to prevent the rack 1 328 from blocking the disassembly of the upper meshing block 2 302. At this time, the guide protrusion 322 and its correspondingly connected slider 2 313 and the upper meshing block 2 302 can be pulled forward out of the movable cavity 306. At this time, the sliding block 336, the supporting block 2 335 and the upper meshing block 2 302 can be replaced with a new one according to the steps of installing the meshing blocks mentioned above. The steps of replacing the lower meshing block 2 302 are the same as those of the upper meshing block 2 302. The size of the supporting block 2 335 can be set according to the wear range allowed by the meshing block 2 302. The setting of the quick-release mechanism does not require threaded assembly, and can achieve the purpose of quickly replacing the engaging blocks. The engaging blocks are replaced with engaging block 1 303 and two engaging blocks 2 302, and the three can be replaced independently without interfering with each other, thus saving costs.

[0029] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A sprocket structure for a coal mine scraper conveyor, characterized in that: The invention comprises a cylinder (2), wherein cavities are penetrated at the upper and lower ends of the cylinder (2), a shaft sleeve (202) is provided in the middle of the cavity, and a plurality of fixing plates (208) are evenly arranged on the outer circumference of the shaft sleeve (202), and the plurality of fixing plates (208) are fixedly connected to the side wall of the cavity, an axial hole (204) is penetrated at the upper and lower ends of the shaft sleeve (202), a plurality of sockets (203) are evenly penetrated on the side wall of the shaft sleeve (202), the plurality of sockets (203) and the plurality of fixing plates (208) are arranged at intervals, the axial hole (204) is communicated with the plurality of sockets (203), the axial hole (204) cooperates with the sprocket shaft, the sprocket shaft is evenly arranged with a plurality of connecting grooves, and a plurality of mounting openings (201) are evenly penetrated on the side end of the cylinder (2), the plurality of mounting openings (201) are communicated with the cavity, and the plurality of mounting openings (201) are evenly arranged on the side end of the cylinder (2). One (201) is connected to a plurality of quick-release mechanisms in a one-to-one correspondence, and the plurality of quick-release mechanisms are fixedly connected to a plurality of plug blocks (4) in a one-to-one correspondence. The upper and lower sections of the plug blocks (4) are penetrated with fixing holes (401). The number of the plurality of quick-release mechanisms, the plurality of plug blocks (4), the plurality of sockets (203) and the plurality of connecting grooves is the same. The plurality of plug blocks (4) are connected to the plurality of connecting grooves in a one-to-one correspondence through the plurality of sockets (203). The end of the quick-release mechanism away from the plug block (4) is detachably connected to the engagement block. The upper and lower sides of the side end of the cylinder (2) are respectively uniformly provided with a plurality of mounting holes in the circumferential direction. The plurality of mounting holes on the upper and lower sides are respectively connected to locking mechanisms on the upper and lower distributed cover plates (1). The locking mechanisms are connected to the fixing holes (401) on the plurality of plug blocks (4). The upper and lower ends of the cover plate (1) are penetrated with shaft holes (102) for the sprocket shaft to pass through.

2. A sprocket structure for a coal mine scraper conveyor according to claim 1, characterized in that: The plurality of mounting holes on the upper side are connected to the upper sides of the plurality of mounting openings (201) in a one-to-one correspondence, and the plurality of mounting holes on the lower side are connected to the lower sides of the plurality of mounting openings (201) in a one-to-one correspondence. The mounting holes include mounting openings (205) and mounting openings (207) which are connected to each other. The mounting openings (205) are arranged on a side away from the shaft sleeve (202), and the mounting openings (207) are arranged on a side close to the shaft sleeve (202). A limit plate (206) is fixedly provided at one end of the mounting openings (205) close to the cover plate (1).

3. A sprocket structure for a coal mine scraper conveyor according to claim 2, characterized in that: The locking mechanism comprises a rotating ring (101) fixedly arranged at one end of the cover plate (1) close to the cylinder (2); a plurality of rotating grooves (108) are evenly arranged on the outer ring of the rotating ring (101) in a circumferential direction; the plurality of rotating grooves (108) are rotatably connected to the plurality of rotating rods (106) in a one-to-one correspondence; the plurality of rotating rods (106) are rotatably connected to the plurality of rotating grooves (107) on the plurality of locking blocks (103) in a one-to-one correspondence; the rotating grooves (107) are arranged on one side of the locking block (103) close to the rotating ring (101); the plurality of locking blocks (103) are rotatably connected to the plurality of rotating rods (106) in a one-to-one correspondence; The horizontal sections of the plurality of fixing blocks (105) are slidably connected in a one-to-one correspondence, a spring (104) is fixedly provided between the locking block (103) and the vertical section of the fixing block (105), the plurality of fixing blocks (105) are evenly arranged circumferentially at one end of the cover plate (1) close to the cylinder (2), the plurality of locking blocks (103) are matched with the plurality of mounting openings (205) in a one-to-one correspondence, the inclined sections of the plurality of locking blocks (103) are in contact with the plurality of limit plates (206) in a one-to-one correspondence, and the plurality of rotating rods (106) are matched with the plurality of mounting openings (207) in a one-to-one correspondence.

4. A sprocket structure for a coal mine scraper conveyor according to claim 3, characterized in that: The locking mechanism also includes a rotating ring 2 rotatably arranged at one end of the cover plate (1) close to the cylinder (2), the inner ring diameter of the rotating ring 1 (101) is larger than the outer ring diameter of the rotating ring 2, the inner ring diameter of the rotating ring 2 is larger than the diameter of the shaft hole 2 (102), and the rotating ring 2 is evenly arranged with a plurality of fixing blocks 3 (109) in the circumferential direction, and the fixing holes (401) on the plurality of fixing blocks 3 (109) and the plurality of insert blocks (4) are matched one by one.

5. The sprocket structure for a coal mine scraper conveyor according to claim 1, characterized in that: The quick-release mechanism comprises a shell (3), the shell (3) being matched with the first installation opening (201), a movable cavity (306) being provided at the front end of the shell (3), a fixing groove (304) and two second fixing grooves (305) being provided at one end of the shell (3) away from the shaft sleeve (202), the two second fixing grooves (305) being symmetrically arranged at the upper and lower sides of the shell (3), the first fixing groove (304) being arranged at the middle of the shell (3), a sliding opening (311) being provided at the front and rear sides of the upper and lower ends of the first fixing groove (304) and the front and rear sides of the two second fixing grooves (305), respectively, a limiting opening (310) being provided at the upper and lower sides of the front and rear ends of the shell (3), the limiting opening (310) and the first fixing groove (304) being symmetrically arranged at the upper and lower sides of the two second fixing grooves (305), The movable grooves (308) are symmetrically arranged at the upper and lower ends of the housing (3); the front end of the movable groove (308) is communicated with the movable opening (309); the movable opening (309) is arranged at the upper and lower sides of the front end of the housing (3); the front and rear sides of the movable groove (308) are symmetrically communicated with connecting holes (332); the movable groove (308) is communicated with the limiting opening (310) through the connecting holes (332); the upper and lower sides of one end of the housing (3) close to the shaft sleeve (202) are symmetrically provided with through holes (312); the through holes (312) are communicated with the groove on the base plate (301); and the end of the base plate (301) away from the groove is fixedly connected to the plug block (4).

6. A sprocket structure for a coal mine scraper conveyor according to claim 5, characterized in that: Support blocks 1 (315) are symmetrically provided on the upper and lower sides of the movable cavity (306); guide convex grooves (321) are symmetrically provided on the upper and lower sides of the support block 1 (315); a guide opening (320) is provided at the front end of a side of the support block 1 (315) close to the shaft sleeve (202); the guide convex groove (321) and the guide opening (320) are connected; and a mounting opening (316) is provided at the front end of a side of the support block 1 (315) away from the shaft sleeve (202).

7. A sprocket structure for a coal mine scraper conveyor according to claim 6, characterized in that: The meshing block comprises a meshing block 1 (303) and two meshing blocks 2 (302); the meshing block 1 (303) passes through a fixing groove 1 (304) and is fixedly connected to a slider 1 (314); the two meshing blocks 2 (302) respectively pass through two fixing grooves 2 (305) and are fixedly connected to two sliders 2 (313) in a one-to-one correspondence; the slider 1 (314) and the two sliders 2 (313) are both provided with guide protrusions (322) at one end close to the supporting block 1 (315); the guide protrusions (322) are slidably connected to the guide protrusions (321); and support grooves (334) are symmetrically provided on the front and rear sides of the ends of the meshing block 2 (302) and the meshing block 1 (303) close to each other.

8. A sprocket structure for a coal mine scraper conveyor according to claim 6, characterized in that: The guide openings (320) on the upper and lower support blocks (315) are matched with the guide blocks (324) on the upper and lower sides in a one-to-one correspondence. The guide blocks (324) on the upper and lower sides are fixedly connected to the baffles (307) on the upper and lower sides respectively. The baffles (307) on the upper and lower sides are matched with the front end of the movable cavity (306). The guide blocks (324) are symmetrically provided with guide convex holes (326) on the upper and lower sides. The guide convex holes (326) are correspondingly connected with the guide convex grooves (321). The guide blocks (324) are symmetrically provided with matching openings (327) on the upper and lower sides of one end close to the support block (315). The matching openings (327) are connected with the guide convex holes (326). The matching openings (327) on the upper and lower sides are matched with the upper and lower ends of the guide opening (320). Push blocks are fixedly provided on the slider (314) and the two sliders (313). The push blocks are correspondingly arranged with the guide convex holes (326).

9. A sprocket structure for a coal mine scraper conveyor according to claim 8, characterized in that: A connecting block is slidably disposed in the groove on the base plate (301), a second spring (329) is fixedly disposed between the connecting block and the groove, and clamping blocks (325) are symmetrically disposed on the upper and lower sides of one end of the connecting block away from the second spring (329), and the clamping blocks (325) pass through the through hole (312) and are correspondingly matched with the guide protruding holes (326).

10. A sprocket structure for a coal mine scraper conveyor according to claim 8, characterized in that: The baffle (307) is symmetrically provided with racks (328) on the upper and lower sides. The racks (328) on the upper and lower sides are connected to the unlocking mechanisms in the support blocks (315) on the upper and lower sides in a one-to-one correspondence. The unlocking mechanism includes a rotating shaft (317) rotatably arranged in the mounting opening (316). The rotating shaft (317) is fixedly connected to the gear (318). The front side of the gear (318) is meshed with the racks (328) correspondingly. The rear side of the gear (318) is meshed with the racks (328) correspondingly. The rack 1 (328) is meshed with the rack 2 (323), the inclined section of the rack 1 (328) is in contact with the slider 1 (314), the inclined section of the rack 2 (323) is in contact with the slider 2 (313), the vertical section of the rack 2 (323) is slidably connected to the rear end of the mounting opening (316), and a spring 3 is fixedly provided between the rack 2 (323) and the fixed block 2 (319), the fixed block 2 (319) is fixedly arranged in the mounting opening (316), and the rack 1 The vertical section of the rack (328) is matched with the movable opening (309), and the vertical section of the rack (328) is in contact with the movable plate (331) in the movable groove (308). A plurality of springs (333) are fixedly provided between the movable plate (331) and the movable groove (308). Connecting rods are symmetrically provided on the front and rear sides of the movable plate (331). The connecting rods pass through the connecting holes (332) and are matched with the limiting holes (330). The limiting holes (330) The limit block (337) is arranged on the limit block (337), the limit block (337) is matched with the limit opening (310), one end of the limit block (337) close to the engagement block is in corresponding contact with the sliding block (336), the sliding block (336) is matched with the sliding opening (311), one end of the sliding block (336) away from the sliding opening (311) is fixedly connected to the second support block (335), and the second support block (335) is matched with the support groove (334) on the engagement block.

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