Chain wheel shaft group structure

Abstract

The utility model discloses a chain wheel shaft group structure which comprises a transmission shaft and a chain wheel, an installation protrusion is arranged on the outer side wall of the transmission shaft, an installation groove matched with the installation protrusion is formed in the inner circumferential face of the chain wheel, and the chain wheel is arranged on the outer side of the installation protrusion in a sleeved mode and connected with the installation protrusion in a clamped mode through the installation groove. A sealing assembly and a rotating assembly are symmetrically arranged on the two axial sides of the chain wheel and both arranged on the outer side of the transmission shaft in a sleeving mode, and the rotating assembly is arranged on the side, away from the chain wheel, of the sealing assembly. An oil storage cavity is formed between the sealing assembly and the rotating assembly and communicates with a lubricating oil way arranged in the transmission shaft. A first plugging assembly is arranged at the axial end, away from the transmission equipment, of the transmission shaft, a second plugging assembly is arranged at the axial end, close to the transmission equipment, of the transmission shaft, and the first plugging assembly and the second plugging assembly are connected with the corresponding rotating assemblies correspondingly.

Description

Technical Field

[0001] The utility model relates to the field of conveying equipment, in particular to a sprocket shaft group structure. Background Art

[0002] Scraper conveyor is mainly used for coal mining face and mining area chute transportation, and can also be used in coal roadway and semi-coal rock roadway excavation face. Scraper conveyor consists of machine head, machine tail, middle trough and its accessories, scraper chain, chain tightening device, push device and anchoring device. The machine head is mainly composed of machine head frame, sprocket shaft assembly, reducer, blind shaft, coupling and motor, among which, sprocket shaft assembly is the force transmission component of the machine head. Generally, sprocket shaft assembly is mainly composed of mandrel and sprocket and other parts. Sprocket is installed in the middle of mandrel. Mandrel and sprocket mainly rely on keys to transmit power and motion.

[0003] After long-term use, the sprocket will cause wear of the sprocket teeth and abnormal meshing phenomena such as chain jamming. Therefore, when the sprocket teeth of the sprocket are severely worn, it is necessary to stop the machine and replace the sprocket; Patent No. ZL202322166104.7 discloses a split sprocket and sprocket shaft assembly for a scraper conveyor, which connects the sprocket to the sprocket shaft through a bolt structure. When replacing the sprocket, it is only necessary to remove the sprocket and replace it separately, and there is no need to replace the sprocket shaft group as a whole, which saves the maintenance cost of the scraper conveyor; However, in the sprocket shaft group structure, only lubricating oil can be injected into the inside of the bearing. Since there is no oil storage space inside the bearing, the lubricating oil injected into the bearing can only adhere to the surface of the bearing ball. After the bearing rotates for a short time, internal friction of the bearing will occur. During the use of the sprocket shaft group, it is necessary to frequently inject lubricating oil into the bearing, which is cumbersome and increases the friction loss inside the bearing, shortens the service life of the bearing, and affects the use effect of the sprocket shaft group. It is necessary to improve it. Summary of the invention

[0004] The utility model aims to solve the above problems and provide a sprocket shaft assembly structure which is simple in structure and convenient to use.

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

[0006] The sprocket wheel has a plurality of sprocket wheels, each of which is provided with a plurality of sprocket wheels, and the sprocket wheels are provided with a plurality of sprocket wheels that are respectively provided with a plurality of sprocket wheels and a plurality of sprocket wheels.

[0007] Furthermore, there are a plurality of mounting protrusions and mounting grooves, and the plurality of mounting protrusions are arranged at equal intervals along the circumferential direction of the transmission shaft, and the plurality of mounting grooves are arranged at equal intervals along the circumferential direction of the sprocket; the mounting protrusions and the mounting grooves are snap-connected with a mortise and tenon structure, and the length of the mounting protrusion is consistent with the axial length of the sprocket.

[0008] Furthermore, the sealing assembly includes a floating seal seat and a positioning ring. The floating seal seat is sleeved on the outer side of the transmission shaft, and one axial end of the floating seal seat contacts the axial end wall of the mounting protrusion and the axial end wall of the sprocket. A positioning groove is provided on the inner circumferential surface of the floating seal seat, and the positioning groove is engaged with a positioning key provided on the outer circumferential surface of the transmission shaft; the positioning ring is provided on the side of the floating seal seat away from the mounting protrusion, and the positioning ring is sleeved on the outer side of the transmission shaft, and one axial end of the positioning ring abuts against the inner circumferential side wall of the floating seal seat, and an oil inlet gap is formed between the inner circumferential surface of the axial end of the positioning ring and the outer circumferential surface of the transmission shaft, and the oil inlet gap is connected with the lubricating oil circuit, and a plurality of oil passing grooves are provided on the axial end wall of the positioning ring abutting against the inner circumferential side wall of the floating seal seat, and the plurality of oil passing grooves are arranged at equal intervals along the circumferential direction of the positioning ring, and the oil inlet gap is connected with the oil storage cavity provided on the outer side of the positioning ring through the oil passing groove.

[0009] Furthermore, the rotating assembly includes a bearing and a bearing seat; the inner circumference of the bearing is sleeved on the outside of the transmission shaft, and the outer circumference of the bearing is sleeved on the bearing seat; an axial end of the inner circumference of the bearing is in contact with an axial end face of the positioning ring, and a stepped gap is formed between the axial end of the bearing seat and the outer circumferential side wall of the floating seal seat; the inner circumferential surface of the bearing seat, the side wall of the floating seal seat, the outer circumferential surface of the positioning ring, and the end face of the bearing together form an oil storage cavity; a positioning pin is provided on the outer circumferential surface of the bearing seat and is fixedly connected to the fixed base through the positioning pin.

[0010] Furthermore, the first blocking assembly includes a baffle cover and an end cover, both of which are circular plate-shaped, the baffle cover is connected to an axial end face of the transmission shaft by a first bolt, the edge of one end of the baffle cover close to the bearing abuts against an end face of the bearing away from the positioning ring, an oil inlet hole is provided at the center of the baffle cover and the oil inlet hole is connected to the lubricating oil circuit; the end cover is provided on the outside of the baffle cover and an oil circuit gap is formed between the two, the edge of the end cover is connected to an end face of the bearing seat away from the floating seal seat by a second bolt, an oil filling hole is provided in the middle of the end cover, the oil filling hole is connected to the oil inlet hole through the oil circuit gap, and a blocking bolt is connected to the inner thread of the oil filling hole.

[0011] Furthermore, the second sealing assembly includes a transparent cover, a retaining ring, and a retaining spring; the retaining ring is sleeved on the outside of the transmission shaft, and one axial end of the retaining ring abuts against the end face of the bearing away from the positioning ring, and the other axial end of the retaining ring is provided with a retaining spring and is abutted and positioned by the retaining spring, and the retaining spring is engaged and connected with an annular groove arranged on the outer periphery of the transmission shaft; the transparent cover is sleeved on the outside of the retaining ring and a rotation gap is provided between the inner circumference of the transparent cover and the outer circumference of the retaining ring; the transparent cover is connected to the end face of the bearing seat away from the floating seal seat by a third bolt.

[0012] Furthermore, the lubricating oil circuit includes a main oil circuit channel, a first branch oil circuit channel, and a second branch oil circuit channel; the main oil circuit channel is arranged in the transmission shaft and the main oil circuit channel is coaxially arranged with the transmission shaft, one end of the main oil circuit channel in the length direction is connected with the oil inlet hole, and the other end of the main oil circuit channel in the length direction is blocked; the first branch oil circuit channel and the second branch oil circuit channel are both provided with a plurality of channels and the length directions of the first branch oil circuit channel and the second branch oil circuit channel are consistent with the radial direction of the transmission shaft; one end of the first branch oil circuit channel and the second branch oil circuit channel is connected with the main oil circuit channel, the other end of the first branch oil circuit channel is connected with the oil storage cavity on the side of the transmission shaft away from the transmission device, and the other end of the second branch oil circuit channel is connected with the oil storage cavity on the side of the transmission shaft close to the transmission device.

[0013] Furthermore, an oil circuit plugging assembly is provided at one end of the transmission shaft and one end of the main oil circuit channel is plugged by the oil circuit plugging assembly; the oil circuit plugging assembly includes a plug and a plug bolt; an oil circuit groove is provided at one end of the transmission shaft close to the second plugging assembly, the plug is embedded in the oil circuit groove and is threadedly connected to the mounting blind hole arranged on the inner wall of the oil circuit groove through the plug bolt.

[0014] Furthermore, a plurality of transmission tooth grooves are arranged on the outer peripheral surface of one end of the transmission shaft close to the second sealing component along the circumferential direction of the transmission shaft, and the length direction of the transmission tooth grooves is consistent with the axial direction of the transmission shaft; the transmission shaft is engaged and connected with the transmission convex tooth structure arranged on the transmission equipment through the transmission tooth grooves to realize the transmission connection between the two.

[0015] Compared with the prior art, the utility model has the following advantages and positive effects:

[0016] The utility model adopts a design in which a sealing component and a rotating component are arranged on both sides of the sprocket shaft, so that the sealing component and the rotating component are enclosed to form an oil storage cavity, and the oil storage cavity is located on one side of the bearing; when in use, lubricating grease can be supplied to the oil storage cavity through the lubricating oil path inside the transmission shaft, and the lubricating grease can continuously enter the inside of the bearing when the bearing rotates, thereby reducing the friction loss inside the bearing; the sprocket shaft group can keep the inside of the bearing in a grease-lubricated state for a long time after the lubricating grease is added once, thereby effectively extending the service life of the bearing; at the same time, it does not need to frequently add lubricating grease to the inside of the bearing, thereby simplifying the maintenance process of the sprocket shaft group, improving the maintenance convenience of the sprocket shaft group, and further improving the use effect of the sprocket shaft group. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a cross-sectional structural diagram of the utility model;

[0019] Figure 2 for Figure 1 A magnified view of the local structure at position A in the middle;

[0020] Figure 3 for Figure 1 A magnified view of the local structure at position B in the middle;

[0021] Figure 4 It is a top view structural diagram of the transmission shaft;

[0022] Figure 5 It is the left view structural diagram of the transmission shaft;

[0023] Figure 6 It is the left view structural diagram of the sprocket;

[0024] Figure 7 It is a left view structural diagram of the floating seal seat in the left sealing assembly;

[0025] Figure 8 This is the right side structural diagram of the locating ring in the left sealing assembly. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the utility model.

[0027] like Figures 1 to 8 As shown, this embodiment discloses a sprocket shaft assembly structure, including a transmission shaft 1 and a sprocket 2. The sprocket 2 is fixedly sleeved on the outside of the transmission shaft 1 and can rotate with the transmission shaft 1; the outer wall of the transmission shaft 1 is provided with a mounting protrusion 101, the inner circumferential surface of the sprocket 2 is provided with a mounting groove 201 adapted to the mounting protrusion 101, and the outer circumferential surface of the sprocket 2 is provided with a tooth structure 202; the sprocket 2 is sleeved on the outside of the mounting protrusion 101 and is engaged with the mounting protrusion 101 through the mounting groove 201;

[0028] There are a plurality of mounting protrusions 101 and mounting grooves 201, and the plurality of mounting protrusions 101 are arranged at equal intervals along the circumferential direction of the transmission shaft 1, and the plurality of mounting grooves 201 are arranged at equal intervals along the circumferential direction of the sprocket 2; the mounting protrusions 101 and the mounting grooves 201 are engaged and connected with a mortise and tenon structure, and the length of the mounting protrusion 101 is consistent with the axial length of the sprocket 2; the mortise and tenon connection structure of the mounting protrusions and the mounting grooves can make the transmission force between the transmission shaft and the sprocket more uniform, increase the strength of the connection structure, and avoid the occurrence of conditions such as the mounting protrusion breaking.

[0029] The sprocket 2 is provided with a left sealing assembly 3 and a left rotating assembly 4 on the axial left side, and the sprocket 2 is provided with a right sealing assembly 9 and a right rotating assembly 10 on the axial right side. The left sealing assembly 3 and the left rotating assembly 4 are symmetrically arranged with the right sealing assembly 9 and the right rotating assembly 10.

[0030] The left sealing component 3 and the left rotating component 4 are both sleeved on the left side of the transmission shaft 1, and the left rotating component 4 is arranged on the side of the left sealing component 3 away from the sprocket 2. The right sealing component 9 and the right rotating component 10 are both sleeved on the right side of the transmission shaft 1, and the right rotating component 10 is arranged on the side of the right sealing component 9 away from the sprocket 2; an oil storage cavity 12 is formed between the left sealing component 3 and the left rotating component 4, and between the right sealing component 9 and the right rotating component 10, and the oil storage cavity 12 is connected to the lubricating oil path 7 arranged inside the transmission shaft 1;

[0031] The left end of the transmission shaft 1 is provided with a first blocking component 5 , which is connected to the left rotating component 4 ; the outer side of the right end of the transmission shaft 1 is provided with a second blocking component 6 , which is connected to the right rotating component 10 .

[0032] The right end of the transmission shaft 1 is provided with a plurality of transmission tooth grooves 102 on the outside; the transmission shaft 1 is engaged with the transmission convex tooth structure provided on the transmission device through the transmission tooth grooves 102 to achieve torque transmission between the two.

[0033] The left-side sealing assembly 3 and the right-side sealing assembly 9 both include a floating seal seat 31 and a positioning ring 32. The floating seal seat 31 is sleeved on the outside of the transmission shaft 1. One axial end of the floating seal seat 31 contacts the axial end wall of the mounting protrusion 101 and the axial end wall of the sprocket 2. A positioning groove 311 is provided on the inner circumference of the floating seal seat 31. The positioning groove 311 is engaged with a positioning key 103 provided on the outer circumference of the transmission shaft 1. The positioning ring 32 is provided on the side of the floating seal seat 31 away from the mounting protrusion 101. The positioning ring 32 is sleeved on the outside of the transmission shaft 1. The positioning groove 311 is engaged with the positioning key 103 provided on the outer circumference of the transmission shaft 1. One axial end of the positioning ring 32 abuts against the inner circumferential side wall of the floating seal seat 31, and an oil inlet gap 321 is formed between the inner circumferential surface of the axial end of the positioning ring 32 and the outer circumferential surface of the transmission shaft 1. The oil inlet gap 321 is connected to the lubricating oil path 7. A plurality of oil grooves 322 are provided on the axial end wall of the positioning ring 32 abutting against the inner circumferential side wall of the floating seal seat 31. The plurality of oil grooves 322 are arranged at equal intervals along the circumferential direction of the positioning ring 32. The oil inlet gap 321 is connected to the oil storage cavity 12 arranged on the outside of the positioning ring 32 through the oil grooves 322.

[0034] The left rotating assembly 4 and the right rotating assembly 10 both include a bearing 41 and a bearing seat 42; the inner circumference of the bearing 41 is sleeved on the outside of the transmission shaft 1, and the outer circumference of the bearing 41 is fixedly sleeved with a bearing seat 42; an axial end of the inner circumference of the bearing 41 abuts against an axial end face of the positioning ring 32, and a stepped gap 11 is formed between the axial end of the bearing seat 42 and the outer circumferential side wall of the floating seal seat 31; the inner circumference of the bearing seat 42, the side wall of the floating seal seat 31, the outer circumference of the positioning ring 32, and the end face of the bearing 41 together form an oil storage cavity 12; a positioning pin 421 is provided on the outer circumference of the bearing seat 42 and is fixedly connected to the fixed base through the positioning pin 421.

[0035] The first blocking component 5 includes a baffle cover 51 and an end cover 52, which are connected to the bearing 41 and the bearing seat 42 in the left rotating component 4; the baffle cover 51 and the end cover 52 are both circular plate-shaped, and the baffle cover 51 is connected to the threaded hole 106 set on the left end face of the transmission shaft 1 through a first bolt 511, and the edge of one end of the baffle cover 51 close to the bearing 41 abuts against the left end face of the bearing 41, and an oil inlet hole 512 is set at the center of the baffle cover 51 and the oil inlet hole 512 is connected to the lubricating oil circuit 7; the end cover 52 is set on the outside of the baffle cover 51 and an oil circuit gap 13 is formed between the two, and the edge of the end cover 52 is connected to the left end face of the bearing seat 42 through a second bolt 521, and an oil filling hole 522 is set in the middle of the end cover 52, and the oil filling hole 522 is connected to the oil inlet hole 512 through the oil circuit gap 13, and a blocking bolt 523 is connected to the inner thread of the oil filling hole 522.

[0036] The second blocking component 6 includes a transparent cover 62, a retaining ring 61, and a retaining spring 63; it is connected to the bearing 41 and the bearing seat 42 in the right rotating component 10; the retaining ring 61 is sleeved on the outside of the transmission shaft 2, and the left end of the retaining ring 61 abuts against the right end face of the bearing 41, and the right end of the retaining ring 61 is provided with a retaining spring 63 and is abutted and positioned by the retaining ring 63, and the retaining spring 63 is engaged and connected with the annular groove 104 set on the outer periphery of the transmission shaft 1; the transparent cover 62 is sleeved on the outside of the retaining ring 61 and a rotation gap 14 is set between the inner circumference of the transparent cover 62 and the outer circumference of the retaining ring 61; the transparent cover 62 is connected to the right end face of the bearing seat 42 by a third bolt 621.

[0037] In order to improve the sealing effect, sealing ring structures are arranged between the floating seal seat and the mounting protrusion end surface, between the end cover and the bearing seat, and between the transparent cover and the bearing seat.

[0038] The first plugging component is mainly used for the sealing assembly operation of the left sealing component and the left rotating component, and the second plugging component is mainly used for the sealing assembly operation of the right sealing component and the right rotating component; after the first plugging component and the second plugging component are assembled, the blocking cover and the retaining ring press the bearing, the positioning ring and the floating seal seat to make them abut against one side of the installation protrusion, and the end cover and the transparent cover are connected to the bearing seat to protect the inside of the bearing and prevent dust from entering the internal gap of the bearing;

[0039] After the entire sprocket shaft assembly is installed, the sprocket, transmission shaft, floating seal seat, positioning ring, inner circumference of the bearing, cover, and retaining ring are all rotating structural parts, and the bearing seat, end cover, and transparent cover are all fixed structural parts;

[0040] On the left side of the transmission shaft, an oil circuit gap and an oil storage cavity are formed between the rotating structural member and the fixed structural member. The oil circuit gap and the oil storage cavity are respectively located on both sides of the bearing. The oil circuit gap is connected to the oil storage cavity through the oil inlet hole on the baffle cover, the lubricating oil circuit inside the transmission shaft, the oil inlet gap inside the positioning ring, and the oil groove on the positioning ring. When performing the grease injection operation, the grease can be injected into the oil circuit gap and the oil storage cavity through the oil injection hole provided on the end cover;

[0041] On the right side of the transmission shaft, an oil storage cavity and a rotating gap are formed between the rotating structural parts and the fixed structural parts. The oil storage cavity and the rotating gap are respectively located on both sides of the bearing and are connected through the internal gap of the bearing. When the lubricating grease is injected, the lubricating grease in the lubricating oil circuit enters the oil storage cavity through the oil inlet gap on the inner side of the positioning ring and the oil groove on the positioning ring, and enters the rotating gap through the internal gap of the bearing. While the lubricating grease lubricates the bearing, it can also seal the gap between the outer circumference of the retaining ring and the inner circumference of the transparent cover, thereby achieving a sealing effect.

[0042] The lubricating oil circuit 7 includes a main oil circuit channel 701, a first branch oil circuit channel 702, and a second branch oil circuit channel 703; the main oil circuit channel 701 is arranged in the transmission shaft 1 and the main oil circuit channel 701 is arranged coaxially with the transmission shaft 1, one end of the main oil circuit channel 701 in the length direction is connected to the oil inlet hole 512, and the other end of the main oil circuit channel 701 in the length direction is blocked; the first branch oil circuit channel 702 and the second branch oil circuit channel 703 are each provided with a plurality of branches and the length directions of the first branch oil circuit channel 702 and the second branch oil circuit channel 703 are Consistent with the radial direction of the transmission shaft 1; one end of the first branch oil circuit channel 702 and the second branch oil circuit channel 703 are connected to the main oil circuit channel 701, the other end of the first branch oil circuit channel 702 is connected to the oil inlet gap 321 on the left side of the transmission shaft 1 and is connected to the oil storage cavity 12 on the left side of the transmission shaft 1 through the oil groove 322 on the positioning ring 32, and the other end of the second branch oil circuit 703 channel is connected to the oil inlet gap 321 on the right side of the transmission shaft 1 and is connected to the oil storage cavity 12 on the right side of the transmission shaft 1 through the oil groove 322 on the positioning ring 32.

[0043] The right end of the transmission shaft 1 is provided with an oil circuit plugging assembly, and the right end of the main oil circuit channel 701 is blocked by the oil circuit plugging assembly; the oil circuit plugging assembly includes a plug 8 and a plug bolt 801; the right end of the transmission shaft 1 is provided with an oil circuit groove 105, and the plug 8 is embedded in the oil circuit groove 105 and is threadedly connected with the mounting blind hole 107 set on the inner wall of the oil circuit groove 105 through the plug bolt 801.

[0044] When the lubricating grease is injected, the lubricating grease enters the main oil channel through the oil filling hole, the oil circuit gap and the oil inlet hole. Under the sealing effect of the oil circuit plugging assembly, the lubricating grease enters the first branch oil channel and the second branch oil channel and respectively enters the oil storage cavities on both sides of the transmission shaft through the first branch oil channel and the second branch oil channel, thereby realizing the oil storage effect of the oil storage cavity. When the lubricating grease enters the oil storage cavity, the interval gap formed between the bearing seat and the floating seal seat and the rotation gap formed between the inner circumference of the transparent cover and the outer circumference of the retaining ring both play the role of exhausting air, so that the lubricating grease can smoothly enter the oil storage cavity.

[0045] The utility model adopts a design in which a sealing component and a rotating component are arranged on both sides of the sprocket shaft, so that the sealing component and the rotating component are enclosed to form an oil storage cavity, and the oil storage cavity is located on one side of the bearing; when in use, lubricating grease can be supplied to the oil storage cavity through the lubricating oil path inside the transmission shaft, and the lubricating grease can continuously enter the inside of the bearing when the bearing rotates, thereby reducing the friction loss inside the bearing; the sprocket shaft group can keep the inside of the bearing in a grease-lubricated state for a long time after the lubricating grease is added once, thereby effectively extending the service life of the bearing; at the same time, it does not need to frequently add lubricating grease to the inside of the bearing, thereby simplifying the maintenance process of the sprocket shaft group, improving the maintenance convenience of the sprocket shaft group, and further improving the use effect of the sprocket shaft group.

Claims

1. A sprocket shaft assembly structure, comprising a transmission shaft and a sprocket, wherein a sprocket fixing sleeve is arranged outside the transmission shaft and can rotate with the transmission shaft; characterized in that: The outer wall of the transmission shaft is provided with a mounting protrusion, and the inner circumferential surface of the sprocket is provided with a mounting groove matched with the mounting protrusion, the sprocket is sleeved on the outside of the mounting protrusion and is engaged with the mounting protrusion through the mounting groove; the sealing assembly and the rotating assembly are symmetrically provided on both axial sides of the sprocket, the sealing assembly and the rotating assembly are both sleeved on the outside of the transmission shaft and the rotating assembly is provided on the side of the sealing assembly away from the sprocket, an oil storage cavity is formed between the sealing assembly and the rotating assembly, and the oil storage cavity is connected to the lubricating oil circuit provided inside the transmission shaft; the first blocking assembly is provided at the axial end of the transmission shaft away from the transmission device, and the second blocking assembly is provided at the axial end of the transmission shaft close to the transmission device, the first blocking assembly and the second blocking assembly are respectively provided corresponding to the two rotating assemblies provided on both axial sides of the sprocket, and the first blocking assembly and the second blocking assembly are respectively connected to the corresponding rotating assemblies.

2. The sprocket shaft assembly structure according to claim 1, characterized in that: There are a plurality of mounting protrusions and mounting grooves, wherein the plurality of mounting protrusions are arranged at equal intervals along the circumferential direction of the transmission shaft, and the plurality of mounting grooves are arranged at equal intervals along the circumferential direction of the sprocket; the mounting protrusions and the mounting grooves are engaged and connected with a mortise and tenon structure, and the length of the mounting protrusion is consistent with the axial length of the sprocket.

3. The sprocket shaft assembly structure according to claim 2, characterized in that: The sealing assembly includes a floating seal seat and a positioning ring. The floating seal seat is sleeved on the outer side of the transmission shaft. One axial end of the floating seal seat contacts the axial end wall of the mounting protrusion and the axial end wall of the sprocket. A positioning groove is arranged on the inner circumferential surface of the floating seal seat, and the positioning groove is engaged with a positioning key arranged on the outer circumferential surface of the transmission shaft. The positioning ring is arranged on the side of the floating seal seat away from the mounting protrusion. The positioning ring is sleeved on the outer side of the transmission shaft. One axial end of the positioning ring abuts against the inner circumferential side wall of the floating seal seat, and an oil inlet gap is formed between the inner circumferential surface of the axial end of the positioning ring and the outer circumferential surface of the transmission shaft. The oil inlet gap is connected with the lubricating oil path. A plurality of oil passing grooves are arranged on the axial end wall of the positioning ring abutting against the inner circumferential side wall of the floating seal seat. The plurality of oil passing grooves are arranged at equal intervals along the circumferential direction of the positioning ring, and the oil inlet gap is connected with the oil storage cavity arranged on the outer side of the positioning ring through the oil passing groove.

4. The sprocket shaft assembly structure according to claim 3, characterized in that: The rotating assembly includes a bearing and a bearing seat; the inner circumference of the bearing is sleeved on the outside of the transmission shaft, and the outer circumference of the bearing is sleeved with a bearing seat; an axial end of the inner circumference of the bearing abuts against an axial end face of a positioning ring, and a stepped gap is formed between an axial end of the bearing seat and an outer circumferential side wall of the floating seal seat; the inner circumferential surface of the bearing seat, the side wall of the floating seal seat, the outer circumferential surface of the positioning ring, and the end face of the bearing together form an oil storage cavity; a positioning pin is provided on the outer circumferential surface of the bearing seat and is fixedly connected to a fixed base through the positioning pin.

5. The sprocket shaft assembly structure according to claim 4, characterized in that: The first plugging assembly includes a baffle cover and an end cover, both of which are circular plates. The baffle cover is connected to an axial end face of the transmission shaft by a first bolt, and an edge of the baffle cover close to the bearing abuts against an end face of the bearing away from the positioning ring. An oil inlet is provided at the center of the baffle cover and is connected to the lubricating oil circuit. The end cover is provided on the outside of the baffle cover and an oil circuit gap is formed between the two. The edge of the end cover is connected to an end face of the bearing seat away from the floating seal seat by a second bolt. An oil filling hole is provided in the middle of the end cover, and the oil filling hole is connected to the oil inlet hole through the oil circuit gap, and a plugging bolt is connected to the inner thread of the oil filling hole.

6. The sprocket shaft assembly structure according to claim 5, characterized in that: The second sealing assembly includes a transparent cover, a retaining ring, and a retaining spring; the retaining ring is sleeved on the outside of the transmission shaft, and one axial end of the retaining ring abuts against the end face of the bearing away from the positioning ring, and the other axial end of the retaining ring is provided with a retaining spring and is abutted and positioned by the retaining spring, and the retaining spring is engaged and connected with an annular groove arranged on the outer periphery of the transmission shaft; the transparent cover is sleeved on the outside of the retaining ring and a rotation gap is provided between the inner circumference of the transparent cover and the outer circumference of the retaining ring; the transparent cover is connected to the end face of the bearing seat away from the floating seal seat by a third bolt.

7. The sprocket shaft assembly structure according to claim 6, characterized in that: The lubricating oil circuit includes a main oil circuit channel, a first branch oil circuit channel, and a second branch oil circuit channel; the main oil circuit channel is arranged in the transmission shaft and the main oil circuit channel is coaxial with the transmission shaft, one end of the main oil circuit channel in the length direction is connected with the oil inlet hole, and the other end of the main oil circuit channel in the length direction is blocked; the first branch oil circuit channel and the second branch oil circuit channel are both provided with a plurality of channels, and the length directions of the first branch oil circuit channel and the second branch oil circuit channel are consistent with the radial direction of the transmission shaft; one end of the first branch oil circuit channel and the second branch oil circuit channel are connected with the main oil circuit channel, the other end of the first branch oil circuit channel is connected with the oil storage cavity on the side of the transmission shaft away from the transmission device, and the other end of the second branch oil circuit channel is connected with the oil storage cavity on the side of the transmission shaft close to the transmission device.

8. The sprocket shaft assembly structure according to claim 7, characterized in that: An oil circuit plugging assembly is provided at one end of the transmission shaft, and one end of the main oil circuit channel is plugged by the oil circuit plugging assembly; the oil circuit plugging assembly includes a plug and a plug bolt; an oil circuit groove is provided at one end of the transmission shaft close to the second plugging assembly, the plug is embedded in the oil circuit groove and is threadedly connected to the mounting blind hole provided on the inner wall of the oil circuit groove through the plug bolt.

9. The sprocket shaft assembly structure according to claim 8, characterized in that: A plurality of transmission tooth grooves are arranged on the outer peripheral surface of one end of the transmission shaft close to the second blocking component along the circumferential direction of the transmission shaft, and the length direction of the transmission tooth grooves is consistent with the axial direction of the transmission shaft; the transmission shaft is engaged and connected with the transmission convex tooth structure arranged on the transmission equipment through the transmission tooth grooves to realize the transmission connection between the two.

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