Chain wheel assembly

Abstract

The utility model discloses a chain wheel assembly which comprises a chain wheel shaft, chain wheel teeth and a connecting bolt. The chain wheel shaft is provided with an inner threaded hole, and the chain wheel teeth are provided with a screw through hole and a head assembly groove. A screw rod of the connecting bolt penetrates through the screw rod via hole and is connected into the internal threaded hole; and the bolt head of the connecting bolt is assembled in the head assembly groove. The first sealing ring is arranged between the bolt head and the groove wall of the head assembling groove, and the blocking cover is arranged in the wrench inserting groove of the bolt head, so that the sealing performance is improved, water, dust, materials and the like can be prevented from entering the screw through hole and adhering to the wrench inserting groove, the problems in the prior art are solved, and the service life of the bolt is prolonged. And subsequent disassembly and replacement of parts are facilitated, and efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of scraper chain wheel, in particular to a chain wheel assembly. Background Art

[0002] The Chinese utility model patent with the publication number of CN219242591U discloses a chain wheel and a chain wheel assembly, which includes a chain wheel body, a tooth block and a connecting piece. A positioning groove is provided on the chain wheel body. The tooth block includes a tooth body and a positioning block. The tooth body is fixedly connected to the positioning block. The connecting piece is a component for fixedly connecting the tooth block and the chain wheel body. The positioning block is inserted into the positioning groove and connected together or the positioning block is separated from the positioning groove. The connecting piece is a screw.

[0003] In the prior art, there is no seal between the screw and the tooth block. During the operation underground, coal powder, water and other materials in the conveyed materials are easy to enter the bolt hole and the gap between the tooth block and the shaft, causing corrosion of the mating surface, or being difficult to disassemble due to adhesion after the materials enter. After the materials fall into the head groove of the screw and adhere, if the bolt needs to be disassembled, it is also necessary to specially remove the adhered materials in the head groove, which is difficult to clean and affects the disassembly efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a chain wheel assembly. A first sealing ring is provided between the bolt head and the groove wall of the head assembly groove, and a plug is configured in the wrench insertion groove of the bolt head, which improves the sealing performance, can prevent water, dust, materials, etc. from entering the screw through hole, and can also prevent water, dust, materials, etc. from adhering in the wrench insertion groove, overcomes the problems in the prior art, facilitates subsequent disassembly and replacement of parts, and improves the efficiency.

[0005] The technical solution of the utility model provides a chain wheel assembly, which includes a chain wheel shaft, chain wheel teeth and a connecting bolt for fixing the chain wheel teeth on the chain wheel shaft;

[0006] The connecting bolt includes a bolt head with a wrench insertion groove and a screw connected to the bolt head;

[0007] The chain wheel shaft is provided with an internal threaded hole for connecting with the screw, and the chain wheel teeth are provided with a screw through hole for the screw to pass through and a head assembly groove for assembling the bolt head;

[0008] The screw passes through the screw through hole and is connected to the internal threaded hole, and the bolt head is assembled in the head assembly groove;

[0009] A first sealing ring is provided between the bolt head and the groove wall of the head assembly groove, and a plug is detachably connected in the wrench insertion groove.

[0010] In one of the alternative technical solutions, the groove wall of the head assembly groove is provided with a groove wall step, and the first sealing ring is located on the groove wall step.

[0011] In one of the alternative technical solutions, a washer is provided between the bolt head and the bottom plate of the head assembly groove.

[0012] In one of the alternative technical solutions, a second sealing ring is provided between the mating surfaces of the sprocket teeth and the sprocket shaft.

[0013] In one of the alternative technical solutions, the wrench insertion groove is an internal hexagonal groove.

[0014] In one of the alternative technical solutions, the sprocket teeth include two separately arranged and adjacent tooth monomers, and each tooth monomer is fixed to the sprocket shaft by at least two of the connecting bolts.

[0015] In one of the alternative technical solutions, the tooth monomer includes two spaced-apart teeth, and each tooth is respectively provided with the screw through hole and the head assembly groove;

[0016] Each tooth is respectively connected to the sprocket shaft by one of the connecting bolts.

[0017] In one of the alternative technical solutions, the bottom of the tooth monomer is provided with a monomer boss, the screw through hole passes through the monomer boss, and the side surface of the monomer boss is provided with a positioning groove;

[0018] The sprocket shaft is provided with a wheel shaft assembly groove, the internal thread hole is provided at the bottom of the wheel shaft assembly groove, the groove wall of the wheel shaft assembly groove is provided with a positioning convex portion, and the positioning convex portion is perpendicular to the axial direction of the sprocket shaft;

[0019] The monomer boss is assembled in the wheel shaft assembly groove, and the positioning convex portion is fitted in the positioning groove.

[0020] In one of the alternative technical solutions, the positioning grooves of the two monomer bosses of each sprocket tooth are arranged in the opposite direction, and correspondingly, the positioning convex portions of the two wheel shaft assembly grooves are arranged in the opposite direction.

[0021] In one of the alternative technical solutions, the wheel shaft assembly groove includes a first groove and a second groove connected to the bottom of the first groove, the first groove is wider than the second groove, and the positioning convex portion is provided on the groove wall of the second groove;

[0022] The monomer boss is assembled in the second groove, and the bottom of the tooth monomer is assembled in the first groove.

[0023] Adopting the above technical solutions, the following beneficial effects are achieved:

[0024] The sprocket assembly provided by the present utility model comprises a sprocket shaft, sprocket teeth and connecting bolts. The sprocket shaft is provided with an internal threaded hole, and the sprocket teeth are provided with a screw through hole and a head assembly groove. The screw of the connecting bolt passes through the screw through hole and is connected to the internal threaded hole, and the bolt head of the connecting bolt is assembled in the head assembly groove. A first sealing ring is provided between the bolt head and the groove wall of the head assembly groove, and a plug is arranged in the wrench insertion groove of the bolt head, improving the sealing performance, which can prevent water, dust, materials, etc. from entering the screw through hole and also prevent water, dust, materials, etc. from adhering to the wrench insertion groove, overcoming the problems in the prior art, facilitating subsequent disassembly and replacement of parts, and improving the efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Referring to the drawings, the disclosure of the present utility model will become more readily understandable. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present utility model. In the drawings:

[0026] Figure 1 is a perspective view of the sprocket assembly provided by an embodiment of the present utility model;

[0027] Figure 2 is an exploded view of the sprocket assembly provided by an embodiment of the present utility model;

[0028] Figure 3 is an exploded view of the plug, connecting bolt, first sealing ring and washer;

[0029] Figure 4 is a radial cross-sectional view of the sprocket assembly provided by an embodiment of the present utility model;

[0030] Figure 5 is Figure 4 an enlarged view of part A in

[0031] Figure 6 is a cross-sectional view of the sprocket teeth provided with a screw through hole and a head assembly groove;

[0032] Figure 7 is a cross-sectional view of the bolt head;

[0033] Figure 8 is a cross-sectional view of the sprocket shaft provided with a wheel shaft assembly groove;

[0034] Figure 9 is a perspective view of the sprocket shaft;

[0035] Figure 10 is a perspective view of the wheel shaft assembly groove;

[0036] Figure 11 is a perspective view of the sprocket teeth composed of two tooth monomers from a perspective;

[0037] Figure 12 The three-dimensional view of the sprocket tooth composed of two tooth monomers from another perspective;

[0038] Figure 13 The three-dimensional view of the tooth monomer from one perspective;

[0039] Figure 14 The three-dimensional view of the tooth monomer from another perspective. Specific embodiments

[0040] The following further illustrates the specific embodiments of the present invention with reference to the accompanying drawings. The same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component, respectively.

[0041] As Figure 1-7 shown, a sprocket assembly provided by an embodiment of the present invention includes a sprocket shaft 1, sprocket teeth 2, and a connecting bolt 3 for fixing the sprocket teeth 2 on the sprocket shaft 1.

[0042] The connecting bolt 3 includes a bolt head 32 having a wrench insertion groove 321 and a screw rod 31 connected to the bolt head 32.

[0043] The sprocket shaft 1 is provided with an internal thread hole 11 for connecting with the screw rod 31, and the sprocket teeth 2 are provided with a screw rod through hole 214 for the screw rod 31 to pass through and a head assembly groove 215 for assembling the bolt head 32.

[0044] The screw rod 31 passes through the screw rod through hole 214 and is connected to the internal thread hole 11, and the bolt head 32 is assembled in the head assembly groove 215.

[0045] A first sealing ring 4 is provided between the bolt head 32 and the groove wall of the head assembly groove 215, and a plug cover 5 is detachably connected in the wrench insertion groove 321.

[0046] The sprocket assembly provided by the present invention includes a sprocket shaft 1, sprocket teeth 2, a connecting bolt 3, a first sealing ring 4, a plug cover 5, etc.

[0047] The connecting bolt 3 includes a bolt head 32 and a screw rod 31, and the screw rod 31 is integrally connected with the bolt head 32. The bolt head 32 has a wrench insertion groove 321 for a wrench to be inserted to screw the connecting bolt 3. The plug cover 5 is a rubber plug cover or a rubber plug cover for being installed in the wrench insertion groove 321 to block the notch of the wrench insertion groove 321 and prevent water, dust, materials, etc. from falling into the wrench insertion groove 321.

[0048] At each position corresponding to each sprocket tooth 2 on the sprocket shaft 1, a plurality of internal threaded holes 11 are provided for connecting the screw 31.

[0049] The plurality of sprocket teeth 2 are arranged at intervals along the circumferential direction of the sprocket shaft 1, and each sprocket tooth 2 is connected to the sprocket shaft 1 by a plurality of connecting bolts 3. The sprocket tooth 2 is provided with a plurality of screw through holes 214 for the screw 31 to pass through. At the top surface of each screw through hole 214, a head assembly groove 215 is provided for assembling the bolt head 32.

[0050] The first sealing ring 4 is a rubber sealing ring, which is used for being assembled between the bolt head 32 and the groove wall of the head assembly groove 215 to prevent water, dust, materials, etc. from falling into the screw through hole 214.

[0051] During assembly, first put the first sealing ring 4 on the designated position of the bolt head 32, pass the screw 31 through the screw through hole 214 and connect it to the internal threaded hole 11, assemble the bolt head 32 in the head assembly groove 215, and then cover the plug 5.

[0052] The sprocket assembly provided by the present utility model has a first sealing ring 4 provided between the bolt head 32 and the groove wall of the head assembly groove 215, and a plug 5 is configured in the wrench insertion groove 321 of the bolt head 32, which improves the sealing performance, can prevent water, dust, materials, etc. from entering the screw through hole 214, and can also prevent water, dust, materials, etc. from adhering in the wrench insertion groove 321, overcomes the problems in the prior art, facilitates subsequent disassembly and replacement of parts, and improves the efficiency.

[0053] In one embodiment, as Figure 5-6 shown, the groove wall of the head assembly groove 215 is provided with a groove wall step 216, and the first sealing ring 4 is located on the groove wall step 216, playing a role in positioning the first sealing ring 4.

[0054] In one embodiment, as Figure 2-5 shown, a washer 6 is provided between the bolt head 32 and the bottom plate of the head assembly groove 215. The washer 6 can be an ordinary rubber washer or a double disc washer, and it is padded between the bottom surface of the bolt head 32 and the bottom plate of the head assembly groove 215, playing a role of buffering, protecting and sealing.

[0055] In one embodiment, as Figure 2 and Figure 5 shown, a second sealing ring 7 is provided between the joint surface of the sprocket tooth 2 and the sprocket shaft 1. The second sealing ring 7 is a rubber sealing ring, which is used to prevent water, dust, etc. from entering the groove of the sprocket shaft 1 through the gap between the sprocket tooth 2 and the sprocket shaft 1, improving the sealing effect.

[0056] In one embodiment, the wrench insertion groove 321 is an internal hexagonal groove so that the user can use a hexagonal wrench to rotate the connecting bolt 3.

[0057] In one embodiment, as Figure 1-2 shown, the sprocket tooth 2 includes two separately arranged and adjacent tooth monomers 21, and each tooth monomer 21 is fixed to the sprocket shaft 1 by at least two connecting bolts 3.

[0058] In this embodiment, a sprocket tooth 2 is divided into two tooth monomers 21, and the weight of each tooth monomer 21 is about half of that of the sprocket tooth 2, which is convenient for handling and installation. Each tooth monomer 21 is fixed to the sprocket shaft 1 by at least two connecting bolts 3, and the connection structure is stable.

[0059] In one embodiment, as Figure 11-14 shown, the tooth monomer 21 includes two spaced-apart teeth 211, and each tooth 211 is respectively provided with a screw through hole 214 and a head assembly groove 215.

[0060] Each tooth 211 is respectively connected to the sprocket shaft 1 by a connecting bolt 3.

[0061] In this embodiment, two teeth 211 are integrally provided at the top of the tooth monomer 21, and a tooth groove is formed between the two teeth 211. Each tooth 211 is provided with a screw through hole 214 and a head assembly groove 215, and each tooth 211 is connected to the sprocket shaft 1 by a connecting bolt 3. The tooth 211 is the main force-bearing component of the sprocket tooth 2, and the connecting bolt 3 is connected between the tooth 211 and the sprocket shaft 1, which can improve the reliability of the connection between the sprocket tooth 2 and the sprocket shaft 1.

[0062] In one embodiment, as Figure 9-14 shown, a monomer boss 212 is provided at the bottom of the tooth monomer 21, the screw through hole 214 passes through the monomer boss 212, and a positioning groove 213 is provided on the side of the monomer boss 212.

[0063] A wheel shaft assembly groove 12 is provided on the sprocket shaft 1, an internal thread hole 11 is provided at the bottom of the wheel shaft assembly groove 12, and a positioning protrusion 123 is provided on the groove wall of the wheel shaft assembly groove 12, and the positioning protrusion 123 is perpendicular to the axial direction of the sprocket shaft 1.

[0064] The monomer boss 212 is assembled in the wheel shaft assembly groove 12, and the positioning protrusion 123 is fitted in the positioning groove 213.

[0065] In this embodiment, a monomer boss 212 is integrally provided at the bottom of the gear tooth monomer 21. The width and length dimensions of the monomer boss 212 are respectively smaller than the width and length dimensions of the gear tooth monomer 21. A screw through hole 214 penetrates through each of the two ends of the monomer boss 212, and two connecting bolts 3 pass through the two ends of the monomer boss 212. A positioning groove 213 is provided on the side surface of the monomer boss 212 along the length direction, and the length direction refers to the axial direction of the sprocket shaft 1. The positioning groove 213 is substantially perpendicular to the axial direction of the sprocket shaft 1.

[0066] On the sprocket shaft 1, a wheel shaft assembly groove 12 is provided corresponding to each gear tooth monomer 21 for assembling the monomer boss 212. An internal thread hole 11 is provided at each of the two ends of the bottom plate of each wheel shaft assembly groove 12. A positioning convex portion 123 is provided on the groove wall of the wheel shaft assembly groove 12 along the length direction, and the positioning convex portion 123 is substantially perpendicular to the axial direction of the sprocket shaft 1.

[0067] During assembly, the monomer boss 212 is assembled in the wheel shaft assembly groove 12, and the positioning convex portion 123 is fitted in the positioning groove 213, which improves the assembly stability and is conducive to the axial transmission of force.

[0068] In one of the embodiments, as Figure 9-12 shown, the positioning grooves 213 of the two monomer bosses 212 of each sprocket tooth 2 are arranged in opposite directions. Correspondingly, the positioning convex portions 123 of the two wheel shaft assembly grooves 12 are arranged in opposite directions.

[0069] With such an arrangement, a positioning convex portion 123 and a positioning groove 213 are respectively fitted on the front and back sides of each sprocket tooth 2, further improving the assembly stability and being conducive to the axial transmission of force.

[0070] In one of the embodiments, as Figure 5 and Figure 9-12 shown, the wheel shaft assembly groove 12 includes a first groove 121 and a second groove 122 connected to the bottom of the first groove 121. The first groove 121 is wider than the second groove 122, and the positioning convex portion 123 is provided on the groove wall of the second groove 122.

[0071] The monomer boss 212 is assembled in the second groove 122, and the bottom of the gear tooth monomer 21 is assembled in the first groove 121.

[0072] In this embodiment, the wheel shaft assembly groove 12 is a stepped groove, which includes a narrower second groove 122 and a wider first groove 121. The first groove 121 is connected to the notch of the second groove 122, so that a stop surface is formed between the bottom plate of the first groove 121 and the notch of the second groove 122. The positioning convex portion 123 is provided on the groove wall of the second groove 122.

[0073] During assembly, the monomer boss 212 is assembled in the second groove 122, the positioning convex part 123 is fitted in the positioning groove 213, the bottom of the gear monomer 21 is assembled in the first groove 121, and the second sealing ring 7 is arranged between the bottom surface of the gear monomer 21 and the bottom plate of the first groove 121 to play a sealing role.

[0074] According to requirements, an appropriate length of the screw can be selected to improve the radial connection ability.

[0075] According to requirements, an appropriate number of positioning convex parts 123 and positioning grooves 213 can be selected to improve the assembly stability and the ability of axial force transmission.

[0076] According to requirements, the above technical solutions can be combined to achieve the best technical effect.

[0077] The above are only the principles and preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, based on the principle of the present invention, several other variants can also be made, which should also be regarded as the protection scope of the present invention.

Claims

1. A sprocket assembly, characterized in that: It comprises a sprocket shaft (1), sprocket teeth (2) and connecting bolts (3) for fixing the sprocket teeth (2) on the sprocket shaft (1); The connecting bolt (3) comprises a bolt head (32) having a wrench insertion groove (321) and a screw rod (31) connected to the bolt head (32); The sprocket shaft (1) is provided with an internal threaded hole (11) for connecting with the screw rod (31), and the sprocket tooth (2) is provided with a screw rod through hole (214) for the screw rod (31) to pass through and a head assembly groove (215) for assembling the bolt head (32); The screw rod (31) passes through the screw rod through hole (214) and is connected to the internal threaded hole (11), and the bolt head (32) is assembled in the head assembly groove (215); A first sealing ring (4) is provided between the bolt head (32) and the groove wall of the head assembly groove (215), and a plugging cover (5) is detachably connected to the wrench insertion groove (321).

2. The sprocket assembly according to claim 1, characterized in that: A groove wall step (216) is provided on the groove wall of the head assembly groove (215), and the first sealing ring (4) is located on the groove wall step (216).

3. The sprocket assembly according to claim 1, characterized in that: A washer (6) is provided between the bolt head (32) and the bottom plate of the head assembly groove (215).

4. The sprocket assembly according to claim 1, characterized in that: A second sealing ring (7) is provided between the contact surfaces of the sprocket teeth (2) and the sprocket shaft (1).

5. The sprocket assembly according to claim 1, characterized in that: The wrench inserting groove (321) is a hexagonal groove.

6. The sprocket assembly according to any one of claims 1 to 5, characterized in that: The sprocket teeth (2) comprise two separate and adjacent gear tooth monomers (21), and each of the gear tooth monomers (21) is fixed to the sprocket shaft (1) via at least two connecting bolts (3).

7. The sprocket assembly according to claim 6, characterized in that The gear tooth unit (21) comprises two teeth (211) arranged at intervals, and each tooth (211) is respectively provided with the screw rod through hole (214) and the head assembly groove (215); Each tooth (211) is connected to the sprocket shaft (1) via one of the connecting bolts (3).

8. The sprocket assembly according to claim 6, characterized in that: A single body boss (212) is provided at the bottom of the gear single body (21), the screw rod through hole (214) passes through the single body boss (212), and a positioning groove (213) is provided on the side of the single body boss (212); The sprocket shaft (1) is provided with a wheel shaft assembly groove (12), the internal threaded hole (11) is provided at the bottom of the wheel shaft assembly groove (12), the groove wall of the wheel shaft assembly groove (12) is provided with a positioning protrusion (123), and the positioning protrusion (123) is perpendicular to the axial direction of the sprocket shaft (1); The single body boss (212) is assembled in the wheel axle assembly groove (12), and the positioning protrusion (123) is matched in the positioning groove (213).

9. The sprocket assembly according to claim 8, characterized in that: The positioning grooves (213) of the two single bosses (212) of each sprocket tooth (2) are arranged in opposite directions, and correspondingly, the positioning protrusions (123) of the two wheel axle assembly grooves (12) are arranged in opposite directions.

10. The sprocket assembly according to claim 8, characterized in that The wheel axle assembly groove (12) comprises a first groove (121) and a second groove (122) connected to the bottom of the first groove (121), the first groove (121) is wider than the second groove (122), and the positioning protrusion (123) is arranged on the groove wall of the second groove (122); The single body boss (212) is assembled in the second groove (122), and the bottom of the gear single body (21) is assembled in the first groove (121).

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