Chain wheel assembly with replaceable wheel teeth

Abstract

A wheel tooth replaceable type chain wheel assembly relates to the technical field of chain wheel assemblies and comprises a chain wheel shaft, a chain wheel assembly body arranged on the chain wheel shaft in a sleeving mode and two bearing assemblies arranged at the two ends of the chain wheel shaft respectively. The chain wheel shaft is in spline fit with the chain wheel assembly, and floating sealing sleeves and positioning assemblies are arranged at the two ends of the chain wheel shaft; the floating sealing sleeve is arranged on the outer wall of the chain wheel shaft in a sleeving mode and located between the bearing assembly and the chain wheel assembly. The floating sealing sleeve is fixedly connected with the outer end face of the chain wheel assembly. The positioning assembly is installed on the outer wall of the chain wheel shaft, arranged between the floating sealing sleeve and the chain wheel assembly and used for positioning the chain wheel assembly in the axial direction of the chain wheel shaft. The floating sealing sleeve is provided with a first positioning face used for positioning the positioning assembly in the radial direction of the chain wheel shaft, and the first positioning face is located on the outer side of the positioning assembly. The chain wheel body can be quickly assembled and replaced, the disassembly and maintenance difficulty is reduced, the overall working efficiency is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of sprocket assemblies, in particular to a sprocket assembly with replaceable gear teeth. Background Art

[0002] During the comprehensive mining process underground in coal mines, the sprocket assembly plays the role of power transmission. In addition to static loads, it is often subjected to pulsating loads, impact loads, etc. Especially under harsh working conditions, the sprocket assembly is more likely to be damaged than other components, and the sprocket assembly has the problem of short tooth service life.

[0003] The main forms of sprocket assembly damage are chain nest wear, broken teeth, seal damage, etc. Damage to the sprocket assembly directly affects the transportation work of the entire working surface of the coal mine. The traditional solution is to improve the wear resistance of the gear teeth, but with the continuous expansion of coal mining in recent years and the increasing severity of working conditions, simply improving the wear resistance of the gear teeth can no longer completely solve the problem of short gear teeth service life. Utility Model Content

[0004] In view of this, the technical problem to be solved by the utility model is: to provide a sprocket assembly with replaceable gear teeth, which can quickly assemble and replace the sprocket body, reduce the difficulty of disassembly and maintenance, and improve the overall work efficiency and service life.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A sprocket assembly with replaceable gear teeth, comprising a sprocket shaft, a sprocket assembly sleeved on the sprocket shaft, and two bearing assemblies disposed at both ends of the sprocket shaft;

[0007] The sprocket shaft and the sprocket assembly are spline-matched, and both ends of the sprocket shaft are provided with floating sleeves and positioning assemblies;

[0008] The floating seal is sleeved on the outer wall of the sprocket shaft and is located between the bearing assembly and the sprocket assembly, and the floating seal is fixedly connected to the outer end surface of the sprocket assembly;

[0009] The positioning assembly is mounted on the outer wall of the sprocket shaft, the positioning assembly is disposed between the floating sleeve and the sprocket assembly, and the positioning assembly is used to position the sprocket assembly along the axial direction of the sprocket shaft;

[0010] The floating sleeve is provided with a first positioning surface for positioning the positioning assembly along the radial direction of the sprocket shaft, and the first positioning surface is located outside the positioning assembly.

[0011] Preferably, the outer wall of the sprocket shaft is provided with external splines arranged along its circumference, and the inner wall of the sprocket assembly is provided with internal splines matched with the external splines.

[0012] Preferably, the external splines and the internal splines are both rectangular splines.

[0013] Preferably, the sprocket assembly comprises four sprocket bodies having the same structure and arranged in sequence along the axial direction of the sprocket shaft;

[0014] A spacer is provided between the sprocket body located on the outside and the sprocket body located on the inside, and the spacer is sleeved on the sprocket shaft;

[0015] The two sprocket bodies located on the inner side abut against each other.

[0016] Preferably, sealing rings are provided between the sprocket body and the spacer sleeve, between the sprocket body and the floating sleeve, and between the floating sleeve and the sprocket shaft.

[0017] Preferably, a mounting through hole is provided on the floating sleeve, a limiting boss of an annular structure is protruded from the outer side of the mounting through hole, and the limiting boss is arranged on the outer end surface of the floating sleeve on a side close to the sprocket assembly.

[0018] Preferably, both end surfaces of the sprocket assembly are provided with second positioning surfaces matched with the limiting boss, and the second positioning surfaces are located on the outer side of the limiting boss.

[0019] Preferably, both end surfaces of the sprocket assembly are provided with mounting blind holes matched with the mounting through holes, and the positions and quantities of the mounting blind holes correspond one to one with those of the mounting through holes.

[0020] Preferably, a dust ring is provided between the bearing assembly and the floating sleeve, and the dust ring is provided on the outside of the mounting through hole.

[0021] Preferably, the positioning assembly includes two mutually abutting positioning half rings, a coaxially arranged positioning groove is recessed on the outer wall of the sprocket shaft, and the two positioning half rings are installed in the positioning groove to form a complete annular structure.

[0022] After adopting the above technical solution, the beneficial effects of the utility model are:

[0023] The utility model comprises a sprocket shaft, a sprocket assembly sleeved on the sprocket shaft, and two bearing assemblies respectively arranged at the two ends of the sprocket shaft; the sprocket shaft and the sprocket assembly are splined to facilitate the disassembly of the sprocket assembly, and the two are splined to each other, and the spline can carry radial loads while transmitting torque, and both ends of the sprocket shaft are provided with floating sleeves and positioning assemblies; wherein the floating sleeve is sleeved on the outer wall of the sprocket shaft and is located between the bearing assembly and the sprocket assembly, the floating sleeve is fixedly connected to the outer end face of the sprocket assembly, and the floating sleeve is attached to the outer end face of the sprocket assembly. The end face is sealed; the positioning assembly is installed on the outer wall of the sprocket shaft, and the positioning assembly is arranged between the floating sleeve and the sprocket assembly. The positioning assembly can position the sprocket assembly along the axial direction of the sprocket shaft to prevent the sprocket assembly from moving along its axial direction; the floating sleeve is provided with a first positioning surface for radially positioning the positioning assembly along the sprocket shaft, and the first positioning surface is located on the outside of the positioning assembly. The floating sleeve can radially position the positioning assembly while sealing the sprocket assembly, and can also radially position the sprocket assembly in cooperation with the positioning assembly, thereby improving the use effect of the sprocket assembly. In the present application, by using a spline fit between the sprocket assembly and the sprocket shaft, the sprocket body can be quickly assembled and replaced, reducing the difficulty of disassembly and maintenance, and improving the overall work efficiency and service life; at the same time, a floating sleeve and a positioning assembly are provided, which can axially and radially position the sprocket assembly, thereby improving the use effect of the sprocket assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic structural diagram of a sprocket assembly with replaceable gear teeth according to an embodiment of the utility model;

[0026] Figure 2 yes Figure 1 A magnified view of part A;

[0027] Figure 3 It is a schematic diagram of the structure of the sprocket body in the embodiment of the utility model;

[0028] Figure 4 It is a schematic diagram of the structure of the positioning half ring in the embodiment of the utility model;

[0029] In the figure:

[0030] 1. Sprocket shaft; 11. External spline; 12. Positioning groove;

[0031] 2. sprocket assembly; 21. internal spline; 22. sprocket body; 23. spacer; 24. second positioning surface; 25. mounting blind hole;

[0032] 3. Bearing assembly;

[0033] 4. floating sleeve; 41. first positioning surface; 42. mounting through hole; 43. limiting boss;

[0034] 5. Positioning assembly; 51. Positioning half ring;

[0035] 6. Sealing ring;

[0036] 7. Dust ring. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0038] like Figures 1 to 4 As shown together, the utility model comprises a sprocket shaft 1 , a sprocket assembly 2 sleeved on the sprocket shaft 1 , and two bearing assemblies 3 respectively arranged at two ends of the sprocket shaft 1 .

[0039] The sprocket shaft 1 and the sprocket assembly 2 are spline-matched. In the present application, the outer wall of the sprocket shaft 1 is provided with an outer spline 11 arranged along its circumference, and the inner wall of the sprocket assembly 2 is provided with an inner spline 21 adapted to the outer spline 11. By adopting the spline match, the sprocket assembly 2 can be detachably mounted on the outer wall of the sprocket shaft 1, changing the traditional fixed connection method, making the sprocket assembly 2 easy to replace; preferably, the outer spline 11 and the inner spline 21 are both rectangular splines, which can transmit torque while bearing radial loads, and make the sprocket assembly 2 easy to disassemble and assemble.

[0040] A floating sleeve 4 and a positioning assembly 5 are provided at both ends of the sprocket shaft 1; wherein, the floating sleeve 4 is sleeved on the outer wall of the sprocket shaft 1 and is located between the bearing assembly 3 and the sprocket assembly 2, and the floating sleeve 4 is fixedly connected to the outer end surface of the sprocket assembly 2; the floating sleeve 4 can seal the outer side of the sprocket assembly 2 and improve its use effect.

[0041] The positioning assembly 5 is installed on the outer wall of the sprocket shaft 1 and is arranged between the floating sleeve 4 and the sprocket assembly 2. The positioning assembly 5 is used to position the sprocket assembly 2 along the axial direction of the sprocket shaft 1 to limit the axial displacement of the sprocket assembly 2 along the sprocket shaft 1.

[0042] The floating sleeve 4 is provided with a first positioning surface 41 for radially positioning the positioning component 5 along the sprocket shaft 1. The first positioning surface 41 is located on the outside of the positioning component 5. The floating sleeve 4 can limit the radial movement of the positioning component 5 while sealing the sprocket assembly 2, and limit its installation on the sprocket shaft 1, thereby ensuring its axial positioning of the sprocket assembly 2 and improving the use effect.

[0043] For the present application, the sprocket assembly 2 includes four sprocket bodies 22 of the same structure and arranged in sequence along the axial direction of the sprocket shaft 1; the four sprocket bodies 22 constitute the entire sprocket assembly 2. When one of the sprocket bodies 22 is severely worn, only one sprocket body 22 needs to be replaced. In the traditional sprocket assembly 2, two sprocket bodies 22 are fixedly connected to form a chain nest. Therefore, when one of the sprocket bodies 22 is worn, the two sprocket bodies 22 fixedly connected together need to be replaced together, which increases the production cost. In the present application, only the worn sprocket body 22 needs to be replaced, which reduces the production cost. Among them, a spacer sleeve 23 is arranged between the sprocket body 22 located on the outside and the sprocket body 22 located on the inside, and the spacer sleeve 23 is sleeved on the sprocket shaft 1; the arrangement of the spacer sleeve 23 forms a chain nest between the sprocket body 22 located on the outside and the sprocket body 22 located on the inside, and the two sprocket bodies 22 located on the inside abut against each other, meeting the use requirements.

[0044] A sealing ring 6 is provided between the sprocket body 22 and the spacer 23, between the sprocket body 22 and the floating sleeve 4, and between the floating sleeve 4 and the sprocket shaft 1. The provision of the sealing ring 6 enhances the sealing effect of each joint; wherein the sealing ring 6 used for sealing between the sprocket body 22 and the spacer 23 is installed on the spacer 23 to prevent the mechanical strength of the sprocket body 22 from being reduced and to reduce its processing difficulty; the sealing ring 6 used for sealing between the sprocket body 22 and the floating sleeve 4 is installed on the floating sleeve 4 to prevent the mechanical strength of the sprocket body 22 from being reduced and to reduce its processing difficulty; the sealing ring 6 used for sealing between the floating sleeve 4 and the sprocket shaft 1 is installed on the sprocket shaft 1 to prevent the mechanical strength of the floating sleeve 4 from being reduced and to reduce its processing difficulty.

[0045] In the present application, a mounting through hole 42 is provided on the floating sleeve 4, and a limiting boss 43 of an annular structure is provided on the outer side of the mounting through hole 42. The limiting boss 43 is arranged on the outer end face of the floating sleeve 4 close to the sprocket assembly 2; both end faces of the sprocket assembly 2 are provided with a second positioning surface 24 adapted to the limiting boss 43, and the second positioning surface 24 is located on the outer side of the limiting boss 43. The limiting boss 43 is an annular structure, and the limiting boss 43 is arranged on the outer side of the mounting through hole 42, which enhances the connection strength between it and the sprocket assembly 2. At the same time, both end faces of the sprocket assembly 2 are provided with a second positioning surface 24, and both end faces of the sprocket assembly 2 are provided with a mounting blind hole 25 adapted to the mounting through hole 42, and the position and number of the mounting blind holes 25 correspond to the mounting through hole 42. After the sprocket assembly 2 is installed on the sprocket shaft 1, there is no need to deliberately distinguish the end face orientation. Specifically, each end face on each sprocket body 22 can be matched with the floating sleeve 4, thereby improving the installation efficiency and reducing the installation difficulty.

[0046] A dust ring 7 is provided between the bearing assembly 3 and the floating seal 4 . The dust ring 7 is provided on the outside of the mounting through hole 42 . The dust ring 7 can achieve effective dustproof sealing and greatly improve the service life of the bearing assembly 3 .

[0047] In the present application, the positioning assembly 5 includes two mutually abutting positioning half rings 51, and a coaxial positioning groove 12 is concavely provided on the outer wall of the sprocket shaft 1. The two positioning half rings 51 are installed in the positioning groove 12 to form a complete annular structure. The positioning assembly 5 is combined with two positioning half rings 51, which can facilitate its installation on the sprocket shaft 1 and also facilitate its disassembly, and can improve its installation and later disassembly efficiency.

[0048] Therefore, in the present application, by adopting spline matching between the sprocket assembly 2 and the sprocket shaft 1, the sprocket body 22 can be quickly assembled and replaced, reducing the difficulty of disassembly and maintenance, and improving the overall work efficiency and service life; at the same time, a floating sleeve 4 and a positioning assembly 5 are provided, which can perform axial and radial positioning on the sprocket assembly 2, thereby improving the use effect of the sprocket assembly 2 and meeting its use requirements.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sprocket assembly with replaceable gear teeth, comprising a sprocket shaft, a sprocket assembly sleeved on the sprocket shaft, and two bearing assemblies disposed at both ends of the sprocket shaft; characterized in that: The sprocket shaft and the sprocket assembly are spline-matched, and both ends of the sprocket shaft are provided with floating sleeves and positioning assemblies; The floating seal is sleeved on the outer wall of the sprocket shaft and is located between the bearing assembly and the sprocket assembly, and the floating seal is fixedly connected to the outer end surface of the sprocket assembly; The positioning assembly is mounted on the outer wall of the sprocket shaft, the positioning assembly is disposed between the floating sleeve and the sprocket assembly, and the positioning assembly is used to position the sprocket assembly along the axial direction of the sprocket shaft; The floating sleeve is provided with a first positioning surface for positioning the positioning assembly along the radial direction of the sprocket shaft, and the first positioning surface is located outside the positioning assembly.

2. The sprocket assembly with replaceable gear teeth according to claim 1, characterized in that: The outer wall of the sprocket shaft is provided with external splines arranged along the circumference thereof, and the inner wall of the sprocket assembly is provided with internal splines matched with the external splines.

3. The sprocket assembly with replaceable gear teeth according to claim 2, characterized in that: The external splines and the internal splines are both rectangular splines.

4. The sprocket assembly with replaceable gear teeth according to claim 1, characterized in that: The sprocket assembly comprises four sprocket bodies having the same structure and arranged in sequence along the axial direction of the sprocket shaft; A spacer is provided between the sprocket body located on the outside and the sprocket body located on the inside, and the spacer is sleeved on the sprocket shaft; The two sprocket bodies located on the inner side abut against each other.

5. The sprocket assembly with replaceable gear teeth according to claim 4, characterized in that: Sealing rings are arranged between the sprocket body and the spacer sleeve, between the sprocket body and the floating sleeve, and between the floating sleeve and the sprocket shaft.

6. The sprocket assembly with replaceable gear teeth according to claim 1, characterized in that: The floating sleeve is provided with a mounting through hole, and a limiting boss with an annular structure is protruded from the outer side of the mounting through hole. The limiting boss is arranged on the outer end surface of the floating sleeve close to the sprocket assembly.

7. The sprocket assembly with replaceable gear teeth according to claim 6, characterized in that: Second positioning surfaces matched with the limiting boss are provided on both end surfaces of the sprocket assembly, and the second positioning surfaces are located on the outer side of the limiting boss.

8. The sprocket assembly with replaceable gear teeth according to claim 6, wherein: Both end surfaces of the sprocket assembly are provided with mounting blind holes matched with the mounting through holes, and the positions and quantities of the mounting blind holes correspond one to one with those of the mounting through holes.

9. The sprocket assembly with replaceable gear teeth according to claim 6, characterized in that: A dust ring is arranged between the bearing assembly and the floating seal, and the dust ring is arranged on the outside of the installation through hole.

10. The sprocket assembly with replaceable gear teeth according to claim 1, wherein: The positioning assembly includes two mutually abutting positioning half rings, a coaxially arranged positioning groove is recessed on the outer wall of the sprocket shaft, and the two positioning half rings are installed in the positioning groove to form a complete annular structure.

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