Tapered roller bearing grease injection tool for axle

Abstract

A tapered roller bearing grease injection tool for an axle belongs to the technical field of bearing maintenance and comprises a grease injection disc, one end of the grease injection disc is detachably connected with a fixing sleeve, the middle of the grease injection disc and the middle of the fixing sleeve are each provided with a channel allowing an axle housing shaft head to penetrate through, and the whole grease injection work of the bearing is completely conducted on the axle housing shaft head. A bearing fixing cavity and a grease injection hole are formed in the fixing sleeve, a sealing ring and an oil seal are detachably installed on the side wall of a channel in the fixing sleeve and distributed on the two sides of the bearing fixing cavity, and a grease injection cavity is formed in the end, connected with the fixing sleeve, of the grease injection disc and communicated with a grease inlet in the grease injection disc. The bearing fixing cavity is communicated with the grease injection cavity through the grease injection hole, the bearing grease injection process is simple, the bearing and the axle housing shaft head do not need to be assembled after lubrication, the phenomenon that lubricating grease leaks when the lubricated bearing is assembled to the axle housing shaft head is avoided, and the grease injection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing maintenance, in particular to a grease filling tooling for tapered roller bearings used in axles. Background Technique

[0002] During the operation of tapered roller bearings, friction will occur between the rolling elements and raceways inside them, which will not only increase energy consumption but also cause wear of the bearings. By filling grease, a lubricating film can be formed inside the bearings, significantly reducing the friction coefficient, reducing friction and wear. At the same time, the grease also has the ability of rust prevention, corrosion prevention and sealing, keeping the bearings clean and dry, and can reduce the noise and vibration generated during the operation of the bearings, improving the overall running stability of the equipment.

[0003] The current grease filling tooling for tapered roller bearings usually places the tapered roller bearings separately inside the tooling (such as the publication number CN221171761U). By adding channels and grease filling holes and combining with a bearing pre-greasing device, the grease is injected into the grease filling holes, flows into the grease filling cavity through the channels, and then the grease is injected between the rollers of the bearing by adding a diversion structure, thus completing the grease filling work of the tapered roller bearings, effectively reducing the operation difficulty and improving the grease filling efficiency.

[0004] However, for the existing grease filling work of tapered roller bearings, the bearings need to be installed on the grease filling tooling for greasing and then removed, and then installed on the axle housing shaft head. It is impossible to lubricate the bearings installed on the axle housing shaft head. The steps of bearing lubrication and installation are cumbersome, and it is very easy for the grease to leak out when the lubricated bearings are assembled onto the axle housing shaft head. Content of the Utility Model

[0005] In order to solve the technical problem that the existing grease filling tooling for tapered roller bearings cannot meet the grease filling work of the tapered roller bearings on the axle housing shaft head in the above-mentioned background technique, the utility model provides a grease filling tooling for tapered roller bearings used in axles.

[0006] The technical solution of the utility model is as follows:

[0007] The utility model provides a grease injection tooling for a tapered roller bearing of an axle. The grease injection tooling includes a grease injection disc. One end of the grease injection disc is detachably connected with a fixed sleeve. Channels allowing the axle head of the axle housing to pass through are provided in the middle parts of the grease injection disc and the fixed sleeve. A bearing fixing cavity and a grease injection hole are arranged inside the fixed sleeve. The bearing fixing cavity is coaxially arranged with the channel. A sealing ring and an oil seal are detachably installed on the side wall of the channel inside the fixed sleeve. The sealing ring and the oil seal are distributed on both sides of the bearing fixing cavity. A grease injection cavity is formed at one end of the grease injection disc where it is connected with the fixed sleeve. The grease injection cavity is communicated with the grease inlet on the grease injection disc. The bearing fixing cavity is communicated with the grease injection cavity through the grease injection hole. Both the grease injection disc and the fixed sleeve are provided with channels allowing the axle head of the axle housing to pass through. The entire grease injection work of the bearing is completely carried out on the axle head of the axle housing. The grease injection process of the bearing is simple. There is no need to assemble the bearing and the axle head after lubrication, avoiding the occurrence of the phenomenon of grease leakage when the lubricated bearing is assembled onto the axle head of the axle housing, improving the grease injection efficiency. The arrangement of the sealing ring and the oil seal can seal both ends of the internal channel of the fixed sleeve during the grease injection process, avoiding the overflow of grease.

[0008] Preferably, a first installation groove is formed at one end of the grease injection disc, and one end of the fixed sleeve is inserted into the first installation groove, facilitating the quick positioning and installation between the fixed sleeve and the grease injection disc.

[0009] Preferably, the grease inlet is formed on the side of the grease injection disc. The grease inlet is provided with internal threads and can be connected with a grease delivery pipe through a threaded connection method, and then connected with a metering grease pump through the grease delivery pipe. The grease injection cavity is located in the first installation groove and is communicated with the grease inlet and the first installation groove respectively, facilitating the guiding injection of grease.

[0010] Preferably, the grease injection cavity is an annular cavity, ensuring that the grease can be evenly distributed into the grease injection holes, and then the grease is evenly injected into the bearing through the grease injection holes.

[0011] Preferably, the cavity shape of the bearing fixing cavity matches the outer shape of the bearing to be lubricated, facilitating the assembly and positioning between the bearing and the grease injection tooling.

[0012] Preferably, a positioning boss is fixedly arranged inside the fixed sleeve. The positioning boss extends towards the direction away from the grease injection hole. The positioning boss is a hollow structure and is coaxially arranged with the fixed sleeve. The grease injection holes are circumferentially distributed on the outside of the positioning boss. The positioning boss can support and position the bearing, enabling a set gap between the bearing and the grease injection holes, ensuring that the grease is evenly and effectively injected into the bearing.

[0013] Preferably, threaded holes are formed on both the grease injection disc and the fixed sleeve, and the grease injection disc and the fixed sleeve are connected by screws.

[0014] Preferably, a second installation groove is provided on the inner wall of one end of the fixed sleeve close to the grease injection disc, and the sealing ring is installed in the second installation groove; a third installation groove is provided on the inner wall of the end of the fixed sleeve away from the grease injection disc, and the oil seal is installed in the third installation groove. The settings of the sealing ring and the oil seal can seal both ends of the inner channel of the fixed sleeve during the grease injection process, avoiding the overflow of the grease.

[0015] Preferably, a fourth installation groove is provided on the side wall of the bearing fixing cavity, and a snap ring is detachably installed in the fourth installation groove for positioning when the bearing grease injection tooling is sleeved on the upper axle housing shaft head to the bearing position.

[0016] Preferably, a handle is fixedly provided on the outer wall of the fixed sleeve for the upper sleeving, rotation and removal of the bearing grease injection tooling on the axle housing shaft head. When injecting grease, the handle is rotated to make the grease entering the bearing raceway evenly distributed.

[0017] It can be seen from the above technical solutions that the advantages of the present utility model are as follows:

[0018] 1. Both the grease injection disc and the fixed sleeve are provided with channels allowing the axle housing shaft head to pass through. The entire grease injection work of the bearing is completely carried out on the axle housing shaft head. The bearing grease injection process is simple, and there is no need to assemble the bearing and the axle housing shaft head after lubrication, avoiding the occurrence of grease leakage when the lubricated bearing is assembled to the axle housing shaft head, improving the grease injection efficiency. The settings of the sealing ring and the oil seal can seal both ends of the inner channel of the fixed sleeve during the grease injection process, avoiding the overflow of the grease.

[0019] 2. A positioning boss is fixedly provided inside the fixed sleeve, and the positioning boss extends in a direction away from the grease injection hole. The positioning boss is a hollow structure and is coaxially arranged with the fixed sleeve. The grease injection holes are circumferentially distributed on the outside of the positioning boss and are used in cooperation with the annular grease injection cavity. The positioning boss can support and position the bearing, so that there is a set gap between the bearing and the grease injection holes, ensuring that the grease is evenly and effectively injected into the bearing.

[0020] 3. A handle is fixedly provided on the outer wall of the fixed sleeve, which is convenient for the upper sleeving, rotation and removal of the bearing grease injection tooling on the axle housing shaft head. The bearing fixing cavity is adapted to the bearing. When injecting grease, the handle is rotated to drive the bearing already installed on the axle housing shaft head to rotate, so that the grease entering the bearing raceway is evenly distributed, realizing efficient grease injection. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 Schematic diagram of the overall structure of the grease injection tooling according to one or more embodiments of the present utility model;

[0023] Figure 2 Schematic diagram of the sectional structure of the grease injection tooling according to one or more embodiments of the present utility model;

[0024] Figure 3 Schematic diagram of the sectional structure of the grease injection disc according to one or more embodiments of the present utility model;

[0025] Figure 4 Schematic diagram of the sectional structure of the fixed sleeve according to one or more embodiments of the present utility model;

[0026] Figure 5 Schematic diagram of the sectional structure of the grease injection tooling in the working state according to one or more embodiments of the present utility model;

[0027] The components represented by the reference numerals in the figure are as follows:

[0028] 1. Grease injection disc; 101. Grease inlet; 102. Grease injection cavity; 103. First threaded hole; 104. First installation groove; 2. Fixed sleeve; 201. Bearing fixing cavity; 202. Grease injection hole; 203. Second threaded hole; 204. Positioning boss; 205. Second installation groove; 206. Third installation groove; 207. Fourth installation groove; 3. Oil seal; 4. Snap ring; 5. Sealing ring; 6. Screw; 7. Handle; 8. Tapered roller bearing; 9. Axle housing shaft head; 10. Grease injection tooling. Specific embodiments

[0029] To make the objectives, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the drawings in the specific embodiments of the present utility model. Obviously, the embodiments described below are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this patent.

[0030] In a typical embodiment of the present utility model, as Figures 1 - 5 shown, a grease injection tooling for tapered roller bearings of a vehicle axle is proposed, including: a grease injection disc 1 and a fixed sleeve 2. The grease injection disc 1 and the fixed sleeve 2 are coaxially arranged, and the fixed sleeve 2 is detachably connected to the grease injection disc 1.

[0031] As Figure 2 、 Figure 3As shown in the figure, the grease injection disc 1 is a hollow structure. The middle part of the grease injection disc 1 has a channel allowing the axle head 9 of the axle housing to pass through. The grease injection disc 1 is provided with a grease inlet 101, a grease injection cavity 102, a first threaded hole 103 and a first installation groove 104. Among them, the first installation groove 104 is opened at one end of the grease injection disc 1. The first installation groove 104 is of an annular groove structure. One end of the fixed sleeve 2 is used to be inserted into the first installation groove 104 to achieve quick positioning and installation between the fixed sleeve 2 and the grease injection disc 1. The first threaded hole 103 runs through the grease injection disc 1 along the axial direction of the grease injection disc 1 for the installation of bolts. Then, the grease injection disc 1 and the fixed sleeve 2 are fixedly connected together by screws 6.

[0032] The grease inlet 101 is opened on the side of the grease injection disc 1. The axis of the grease inlet 101 is perpendicular to the axis of the grease injection disc 1. The inside of the grease inlet 101 is provided with internal threads to be connected with the grease delivery pipe through threaded connection. Then, it is connected with a metering grease pump through the grease delivery pipe to achieve the purpose of metering grease injection and avoid waste of lubricating grease. The grease injection cavity 102 is opened at the end of the grease injection disc 1 where the first installation groove 104 is located. The grease injection cavity 102 is located inside the first installation groove 104. The grease injection cavity 102 is an annular cavity, that is, the grease injection cavity 102 extends along the circumferential direction of the grease injection disc 1. The axis of the grease injection cavity 102 is perpendicular to the grease inlet 101. One side of the grease injection cavity 102 is connected to the inside of the grease inlet 101, and the other side of the grease injection cavity 102 is connected to the first installation groove 104. Thus, the lubricating grease can sequentially enter the first installation groove 104 through the grease inlet 101 and the grease injection cavity 102, and then enter the inside of the fixed sleeve 2 through the first installation groove 104 to lubricate the bearing.

[0033] As Figure 2 、 Figure 4 shown in the figure, the fixed sleeve 2 is a hollow structure. The middle part of the fixed sleeve 2 has a channel allowing the axle head 9 of the axle housing to pass through. The inside of the fixed sleeve 2 is provided with a bearing fixing cavity 201 and grease injection holes 202. The bearing fixing cavity 201 is coaxially arranged with the channel in the middle part of the fixed sleeve 2, and the cavity type of the bearing fixing cavity 201 matches the outer shape of the tapered roller bearing 8 to be lubricated, so as to facilitate the positioning and installation between the tapered roller bearing 8 and the fixed sleeve 2. There are several grease injection holes 202. The several grease injection holes 202 are evenly arranged along the circumferential direction of the fixed sleeve 2. One end of the grease injection hole 202 is communicated with the bearing fixing cavity 201, and the other end of the grease injection hole 202 penetrates through the end of the fixed sleeve 2 connected to the grease injection disc 1 for communicating with the grease injection cavity 102, so as to evenly inject the lubricating grease into the bearing raceway.

[0034] One end of the fixed sleeve 2 for connecting with the grease injection disc 1 is also provided with a second threaded hole 203. The number of the first threaded holes 103 and the second threaded holes 203 is the same and they correspond to each other one by one. In actual use, the second threaded hole 203 and the first threaded hole 103 are coaxially arranged, so as to facilitate fixing and connecting the grease injection disc 1 and the fixed sleeve 2 together by using the screw 6.

[0035] It can be understood that the number of the first threaded holes 103 and the second threaded holes 203 can be set according to actual requirements, and the specific number of settings is not limited too much here.

[0036] A positioning boss 204 is fixedly arranged inside the fixed sleeve 2. The positioning boss 204 extends in a direction away from the grease injection hole 202. The positioning boss 204 is a hollow structure and is coaxially arranged with the fixed sleeve 2. The positioning boss 204 is located in the area enclosed by all the grease injection holes 202, that is, the grease injection holes 202 are circumferentially distributed on the periphery of the positioning boss 204. The positioning boss 204 is used for supporting and positioning the bearing, so that there is a set gap between the bearing and the grease injection holes 202, ensuring that the grease is evenly and effectively injected into the bearing.

[0037] A second installation groove 205, a third installation groove 206 and a fourth installation groove 207 are also opened inside the fixed sleeve 2. Specifically, as Figure 4 shown, the second installation groove 205 is opened on the inner wall of one end of the fixed sleeve 2 close to the grease injection disc 1. The second installation groove 205 is an annular groove and is coaxially arranged with the fixed sleeve 2. A sealing ring 5 is detachably installed in the second installation groove 205. The sealing ring 5 is a rubber sealing ring, which can prevent the grease from overflowing outward towards the axle head of the axle housing during injection; the third installation groove 206 is opened on the inner wall of the other end of the fixed sleeve 2 away from the grease injection disc 1. The third installation groove 206 is also an annular groove. An oil seal 3 is detachably installed in the third installation groove 206 to prevent the grease from overflowing outward in the opposite direction of the axle head during injection, that is, through the cooperation of the oil seal 3 and the sealing ring 5, both ends of the internal channel of the fixed sleeve 2 are sealed during the grease injection process; the fourth installation groove 207 is opened on the side wall of the bearing fixing cavity 201 inside the fixed sleeve 2. A snap ring 4 is detachably installed in the fourth installation groove 207, which is used for positioning when the bearing grease injection tooling is sleeved on the axle head 9 of the axle housing to the bearing position.

[0038] It can be understood that the channel shapes of the hollow parts of the grease injection disc 1 and the fixed sleeve 2 match the outer shape of the axle head 9 of the axle housing.

[0039] In order to ensure the uniformity of grease injection, a handle 7 is also fixedly welded on the outer wall of the fixed sleeve 2. There are two handles 7 and the two handles 7 are symmetrically arranged on both sides of the fixed sleeve 2, which are used for sleeving, rotating and removing the bearing grease injection tooling on the axle head of the axle housing. When injecting grease, the handle 7 is rotated to make the grease entering the bearing raceway evenly distributed.

[0040] In this embodiment, the handle 7 is a rectangular handle. In other embodiments, the handle 7 can also be of other shapes, and specific shapes are not overly restricted here. For ease of operation, the handle 7 is provided with an anti-slip structure, such as anti-slip grooves, anti-slip rubber sleeves, etc.

[0041] As Figure 5 described, the specific working principle is as follows:

[0042] During operation, connect the grease inlet 101 of the grease injection tooling 10 to the grease delivery pipe of the metering grease pump, and sleeved the grease injection tooling 10 onto the axle head 9 of the axle housing and push it to the tapered roller bearing. The grease passes from the grease inlet 101 through the annular cavity 102 and reaches the bearing fixing cavity 201 through the grease injection hole 202 and finally enters the bearing raceway. Use the handle 7 to rotate the bearing grease injection tooling on the axle head of the axle housing to evenly apply the grease on the bearing. Then remove the bearing grease injection tooling, thereby achieving efficient and high-quality greasing.

[0043] The entire grease injection work of the bearing is completely carried out on the axle head of the axle housing. The bearing grease injection process is simple, and there is no need to assemble the bearing and the axle head 9 of the axle housing after lubrication, avoiding the occurrence of grease leakage when the lubricated bearing is assembled onto the axle head of the axle housing.

[0044] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A grease injection tool for a tapered roller bearing for an axle, comprising: The grease injection plate (1) is characterized in that one end of the grease injection plate (1) is detachably connected to a fixed sleeve (2), the middle parts of the grease injection plate (1) and the fixed sleeve (2) are both provided with a channel allowing the bridge housing shaft head (9) to pass through, a bearing fixing cavity (201) and a grease injection hole (202) are provided inside the fixed sleeve (2), the bearing fixing cavity (201) and the channel are coaxially arranged, a sealing ring (5) and an oil seal (3) are detachably installed on the side wall of the channel in the fixed sleeve (2), the sealing ring (5) and the oil seal (3) are distributed on both sides of the bearing fixing cavity (201), a grease injection cavity (102) is opened at one end of the grease injection plate (1) connected to the fixed sleeve (2), the grease injection cavity (102) is communicated with the grease inlet (101) on the grease injection plate (1), and the bearing fixing cavity (201) is communicated with the grease injection cavity (102) through the grease injection hole (202).

2. The grease injection tool for tapered roller bearings for vehicle axles according to claim 1, characterized in that: A first mounting groove (104) is formed at one end of the grease injection disc (1), and one end of the fixing sleeve (2) is inserted into the first mounting groove (104).

3. The grease injection tool for tapered roller bearings for vehicle axles according to claim 2, characterized in that: The grease inlet (101) is provided on the side of the grease injection plate (1), the grease inlet (101) is provided with an internal thread, the grease injection cavity (102) is located in the first mounting groove (104), and the grease injection cavity (102) is respectively connected to the grease inlet (101) and the first mounting groove (104).

4. The grease injection tool for tapered roller bearings for axles according to claim 3, characterized in that: The grease injection cavity (102) is an annular cavity.

5. The grease injection tool for tapered roller bearings for vehicle axles according to claim 1, characterized in that: The cavity shape of the bearing fixing cavity (201) matches the outer shape of the bearing to be lubricated.

6. The grease injection tool for tapered roller bearings for axles according to claim 1, characterized in that: A positioning boss (204) is fixedly provided inside the fixed sleeve (2), the positioning boss (204) extends in a direction away from the grease injection hole (202), the positioning boss (204) is a hollow structure and is coaxially arranged with the fixed sleeve (2), and the grease injection holes (202) are distributed circumferentially on the circumferential side of the positioning boss (204).

7. The grease injection tool for tapered roller bearings for vehicle axles according to claim 1, characterized in that: The grease injection disc (1) and the fixed sleeve (2) are both provided with threaded holes, and the grease injection disc (1) and the fixed sleeve (2) are connected via screws (6).

8. The grease injection tool for tapered roller bearings for vehicle axles according to claim 1, characterized in that: A second mounting groove (205) is provided on the inner wall of one end of the fixed sleeve (2) close to the grease injection disk (1), and the sealing ring (5) is installed in the second mounting groove (205); a third mounting groove (206) is provided on the inner wall of one end of the fixed sleeve (2) away from the grease injection disk (1), and the oil seal (3) is installed in the third mounting groove (206).

9. The grease injection tool for tapered roller bearings for vehicle axles according to claim 1, characterized in that: A fourth installation groove (207) is provided on the side wall of the bearing fixing cavity (201), and a snap ring (4) is detachably installed in the fourth installation groove (207).

10. The grease injection tool for tapered roller bearings for vehicle axles according to claim 1, characterized in that: A handle (7) is fixedly provided on the outer wall of the fixed sleeve (2).

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