Press-fitting greasing device and method for automobile steering device shell bearing

Abstract

The invention relates to a press-fitting greasing device, in particular to a press-fitting greasing device for an automobile steering device shell bearing. The press-fitting greasing device comprises a support, a pressing head is installed on the support through a press-fitting oil cylinder, and a supporting and positioning tool is arranged on the support. A grease storage barrel and an oil pump are arranged on one side of the bracket; the supporting and positioning tool comprises a base and a positioning shaft, a connecting opening is formed in the bottom face of the base, a center counter bore and a greasing hole are formed in the positioning shaft, and the greasing hole, the center counter bore, the connecting opening and the oil pump are sequentially communicated. The press-fitting greasing device can be used for greasing and press-fitting the bearing, and greasing of the bearing can be completed in the press-fitting process of the bearing, so that the production takt can be effectively accelerated, the production efficiency is improved, and the rapid production requirement of an enterprise is met. And positioning can be conducted in the press-fitting process through the positioning sleeve, so that it is guaranteed that the bearing is not prone to deviation in the press-fitting process, and the press-fitting quality is guaranteed. The problem that the production takt and the production efficiency are affected due to the fact that an existing tool can only conduct press fitting is solved.

Description

Technical Field

[0001] The invention relates to a press-fit grease coating device and method, in particular to a press-fit grease coating device and method for a steering gear housing bearing of an automobile. Background Art

[0002] As a commonly used means of transportation, automobile sales in China are gradually increasing. The steering feel and abnormal noise of automobiles are closely watched by drivers. One reason affecting the steering feel and abnormal noise is that the grease coating of the needle roller bearing of the automobile steering gear housing does not meet the grease quality requirements. Another reason is that the press-fitting depth of the needle roller bearing is unqualified, which makes it easy for the gear shaft to rub against the outer ring of the bearing, resulting in rotation jamming, affecting the driver's driving experience.

[0003] The patent application with the announcement number CN204171913U discloses a tooling for pressing the bottom bearing of the steering gear housing of an automobile, which includes a shaft core, a housing positioning block, a limit plate, a spring, and a base. One end of the shaft core is connected to the base, and a boss extends from the other end of the shaft core. The boss is sleeved with the bearing to be pressed. The spring is sleeved on the end of the shaft core connected to the base. The housing positioning block is sleeved on the shaft core and pressed on the end of the spring. When the spring is stretched, a gap is provided between the end face of the housing positioning block facing the base end and the base. The present invention has the following advantages: 1. It eliminates the influence of human factors, equipment, environment and other factors during the process of pressing the bearing of the steering gear housing, and realizes the coaxiality requirement required by the bearing press-fitting by relying on the accuracy of the tooling fixture of the present invention to ensure that the accuracy of the bearing itself is not damaged; 2. The bearing is less deformed and has high accuracy during press-fitting.

[0004] The above tooling can press-fit the steering gear housing bearing of the automobile, but it cannot grease the bearing during the press-fitting process. It is necessary to grease the bearing manually or by an oiler after the press-fitting is completed. The press-fitting and grease-coating process requires multiple stations and multiple processes to be completed separately, which greatly affects the production rhythm, resulting in low production efficiency and not meeting the needs of enterprises for rapid production. Therefore, it is necessary to improve it to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a press-fit grease coating device and method for automobile steering gear housing bearings which can effectively speed up the production cycle and improve the production efficiency.

[0006] The technical solution of the present invention is: A press-fit grease coating device for a steering gear housing bearing of an automobile comprises a bracket, a press-fit oil cylinder, a pressure head, a support and positioning tool, a grease storage barrel and an oil pump, and is characterized in that: a press-fit oil cylinder is arranged on the bracket, a pressure head is arranged at the end of the piston rod of the press-fit oil cylinder, and a support and positioning tool is arranged on the bracket below the pressure head; a grease storage barrel is arranged on one side of the bracket, and an oil pump is arranged on the grease storage barrel; the support and positioning tool comprises a base and a positioning shaft, a positioning shaft is threadedly mounted on the middle part of the top surface of the base, a connecting port is arranged on the bottom surface of the base, and the connecting port is connected to the oil pump through an oil pipe; a center countersunk hole is arranged on the bottom end surface of the positioning shaft, and grease coating holes are evenly distributed on the circumference of the top end of the positioning shaft, and the grease coating holes, the center countersunk hole and the connecting port are connected in sequence.

[0007] A supporting sealing flange is arranged on the positioning shaft below the grease application hole, and a limiting shoulder is arranged on the positioning shaft below the supporting sealing flange.

[0008] A positioning sleeve is sleeved on the positioning shaft, and a return spring is sleeved on the positioning shaft between the positioning sleeve and the base; the top end surface of the positioning sleeve is abutted and connected with the limiting shoulder.

[0009] The positioning sleeve is sleeved with a dust cover, which is fixedly connected to the base.

[0010] The dust cover is provided with a vent hole.

[0011] The oil pipe is provided with a pressure gauge.

[0012] A method for press-fitting and greasing a bearing of a steering gear housing of an automobile, characterized in that it comprises the following steps: 1) Sleeve the needle roller bearing onto the positioning shaft of the bearing press-fit grease coating device of the steering gear housing of the automobile, so that the bottom port of the needle roller bearing abuts against the supporting sealing flange of the positioning shaft; 2) Put the steering gear housing of the automobile on the support positioning tooling through the support seat assembly opening, so that the positioning sleeve is inserted into the support seat assembly opening; 3) Start the press-fitting cylinder, which presses down the steering gear housing of the automobile through the pressure head. The pressure head drives the steering gear housing of the automobile downward under the action of hydraulic pressure, and completely sets the support seat assembly port of the steering gear housing of the automobile on the positioning sleeve. The steering gear housing of the automobile is positioned through the positioning sleeve to prevent the steering gear housing from shifting during the press-fitting of the needle roller bearing; 4) After the positioning sleeve positions the steering gear housing, the pressure head continues to press down the steering gear housing, and the needle roller bearing is pressed upward into the steering gear housing under the support of the positioning shaft; 5) When the pressure head stops moving downward, control the hydraulic pressure of the press-fitting cylinder at 1.8-2.4MPa and maintain it for more than 3s to eliminate stress and ensure that the press-fitting is in place; 6) After the needle roller bearing is pressed into place, start the oil pump and inject the grease in the grease storage barrel into the needle roller bearing through the oil pump, oil pipe, center countersunk hole of the positioning shaft, and grease hole in sequence. During the injection process, the amount of grease applied to the needle roller bearing is adjusted by the grease pressure.

[0013] The beneficial effects of the present invention are: The press-fit grease coating device for the automobile steering gear housing bearing can grease the inner side of the bearing by setting a grease coating hole in the center countersunk hole, and can press the bearing into the automobile steering gear housing by cooperating with the support positioning tooling through the press-fit oil cylinder. The grease coating of the bearing can be completed during the press-fitting process of the bearing, thereby effectively speeding up the production rhythm, improving production efficiency, and meeting the rapid production needs of the enterprise. The positioning sleeve can be used for positioning during the press-fitting process, thereby ensuring that the bearing is not easily offset during press-fitting and ensuring the press-fitting quality. The problem that the existing tooling can only be press-fitted, which affects the production rhythm and production efficiency, is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle; Figure 3 It is a structural schematic diagram of the supporting and positioning tooling of the present invention; Figure 4 It is a structural schematic diagram of the positioning shaft of the present invention.

[0015] In the figure: 1. bracket, 2. press-fit oil cylinder, 3. pressure head, 4. grease storage barrel, 5. oil pump, 6. base, 7. positioning shaft, 8. connection port, 9. oil pipe, 10. center countersunk hole, 11. grease application hole, 12. supporting sealing flange, 13. limit shoulder, 14. positioning sleeve, 15. reset spring, 16. dust cover, 17. vent hole, 18. pressure gauge, 19. automobile steering gear housing, 20. needle roller bearing. DETAILED DESCRIPTION

[0016] The press-fit grease coating device for the bearing of the automobile steering gear housing comprises a bracket 1, a press-fit oil cylinder 2, a pressure head 3, a support and positioning tool, a grease storage barrel 4 and an oil pump 5. The bracket 1 is provided with a press-fit oil cylinder 2, and the press-fit oil cylinder 2 is driven by the hydraulic pressure transmitted by the hydraulic station. The piston rod end of the press-fit oil cylinder 2 is provided with a pressure head 3. The function of the press-fit oil cylinder 2 is to push the pressure head 3 through the press-fit oil cylinder 2, and then to extrude through the pressure head 3, so that the needle roller bearing is squeezed into the automobile steering gear housing by the extrusion force of the pressure head 3 to complete the press-fitting. A support and positioning tool is provided on the bracket 1 below the pressure head 3, so that the needle roller bearing is supported and positioned by the support and positioning tool, so that when the pressure head 3 presses down the automobile steering gear housing, the needle roller bearing and the automobile steering gear housing are relatively moved by the support and positioning of the support and positioning tool, thereby pressing the needle roller bearing into the automobile steering gear housing.

[0017] The supporting and positioning tooling comprises a base 6 and a positioning shaft 7, and the positioning shaft 7 is threadedly installed in the middle of the top surface of the base 6. The needle bearing can be sleeved on the end of the positioning shaft 7, and then the needle bearing is supported and positioned by the positioning shaft 7.

[0018] A grease storage barrel 4 is provided on one side of the bracket 1, and an oil pump 5 is provided on the grease storage barrel 4. A connection port 8 is provided on the bottom surface of the base 6, and the connection port 8 is connected to the oil pump 5 through an oil pipe 9. A central countersunk hole 10 is provided on the bottom end surface of the positioning shaft 7, and grease holes 11 are evenly distributed on the circumference of the top end of the positioning shaft 7. The grease holes 11, the central countersunk hole 10, and the connection port 8 are connected in sequence. The function of the oil pump 5 is to pump the grease in the grease storage barrel 4 outward through the oil pump 5, so that the grease enters the grease hole 11 through the oil pump 5, the oil pipe 9, and the central countersunk hole 10 in sequence, and then squeezes outward through the grease hole 11, thereby grease the needle bearing sleeved on the outside of the grease hole 11, so that the grease enters the inside of the needle bearing, and ensures that the needle bearing is fully lubricated. Multiple grease holes 11 are evenly distributed in the axial direction and circumference of the positioning shaft 7, respectively, and the evenly distributed grease holes 11 can ensure the uniform distribution and comprehensive coating of the grease. A pressure gauge 18 is provided on the oil pipe 9 to monitor the delivery pressure of the grease through the pressure gauge 18, and then control the delivery amount of the grease through the delivery pressure of the grease, thereby controlling the coating amount of the grease on the needle bearing.

[0019] A supporting sealing flange 12 is provided on the positioning shaft 7 below the grease hole 11. The function of the supporting sealing flange 12 is, on the one hand, to support the needle bearing through the supporting sealing flange 12, and then the boss formed by the supporting sealing flange 12 ensures the depth of the needle bearing pressed into the steering gear housing of the automobile, and ensures that the needle bearing is pressed into place through the pressing depth of the needle bearing, while avoiding the friction between the outer ring of the needle bearing and the end face of the steering gear input shaft due to insufficient pressing depth of the needle bearing, thereby affecting the rotation of the steering gear input shaft; on the other hand, the end face of the needle bearing can be sealed through the supporting sealing flange 12, so that when the grease is applied, the grease does not flow downward and squeeze out of the supporting positioning tooling, thereby avoiding waste and pollution of the environment.

[0020] A limiting shoulder 13 is provided on the positioning shaft 7 below the supporting sealing flange 12. A positioning sleeve 14 is mounted on the positioning shaft 7, and the top end surface of the positioning sleeve 14 is abutted against the limiting shoulder 13, so that the positioning sleeve 14 is limited by the limiting shoulder 13, and the positioning sleeve 14 is limited on the positioning shaft 7 to prevent the positioning sleeve 14 from being separated from the positioning shaft 7. A reset spring 15 is mounted on the positioning shaft 7 between the positioning sleeve 14 and the base 6, so that the positioning sleeve 14 can float up and down through the reset spring 15, and then the positioning sleeve 14 and the automobile steering gear housing are made to descend together during the downward process of the automobile steering gear housing, so as to maintain the positioning of the positioning sleeve 14 on the automobile steering gear housing, and ensure that the automobile steering gear housing is not easily offset during the process of pressing the needle roller bearing.

[0021] The positioning sleeve 14 is covered with a dust cover 16, so that the lower end of the positioning sleeve 14 is isolated by the dust cover 16 to prevent dust from entering, and to protect the lubrication between the positioning sleeve 14 and the positioning shaft 7. The dust cover 16 is fixedly connected to the base 6. The dust cover 16 is provided with a vent hole 17, so that the vent hole 17 is connected to the atmosphere, so that the upward and downward movement of the positioning sleeve 14 is not easy to be blocked, and the dust cover is not easy to affect the movement of the positioning sleeve 14.

[0022] The press-fit grease coating method for the automobile steering gear housing bearing comprises the following steps: The needle roller bearing is mounted on the positioning shaft 7 of the bearing press-fit grease coating device of the automobile steering gear housing, so that the bottom port of the needle roller bearing abuts against the supporting sealing flange 12 of the positioning shaft 7. After the needle roller bearing is mounted in place, the automobile steering gear housing is mounted on the supporting positioning tooling through the supporting seat assembly port, and the positioning sleeve 14 is inserted into the supporting seat assembly port.

[0023] Start the press-fitting oil cylinder 2, which presses down the automobile steering gear housing through the pressure head 3. The pressure head 3 drives the automobile steering gear housing downward under the action of hydraulic pressure, and completely sets the support seat assembly port of the automobile steering gear housing on the positioning sleeve 14. The automobile steering gear housing is positioned by the positioning sleeve 14 to prevent the automobile steering gear housing from deflecting during the press-fitting of the needle bearing. After the positioning sleeve 14 positions the automobile steering gear housing, the automobile steering gear housing presses down the positioning sleeve 14 to overcome the elastic force of the return spring 15 and moves downward. In the process of the pressure head 3 continuing to press down the automobile steering gear housing, since the positioning shaft 7 supports the needle bearing to remain stationary, the needle bearing moves upward relative to the automobile steering gear housing under the support of the positioning shaft 7, and then the needle bearing is press-fitted upward into the automobile steering gear housing. After the needle bearing is press-fitted into place, that is, when the needle bearing pressure head 3 no longer moves downward, the hydraulic pressure of the press-fitting oil cylinder 2 is controlled to be 1.8-2.4MPa, and maintained for more than 3s to eliminate stress and ensure that the press-fitting is in place.

[0024] After the needle roller bearing is pressed into place, the oil pump 5 is started, and the grease in the grease storage barrel 4 is injected into the needle roller bearing in sequence through the oil pump 5, the oil pipe 9, the center countersunk hole 10 of the positioning shaft 7, and the grease application hole 11. During the injection process, the grease application amount of the needle roller bearing is adjusted by the grease pressure.

[0025] The press-fit grease coating device for the automobile steering gear housing bearing can coat the inner side of the bearing with grease by setting the central countersunk hole 10 in cooperation with the grease coating hole 11, and the bearing can be press-fitted into the automobile steering gear housing by the press-fitting oil cylinder 2 in cooperation with the supporting positioning tooling, and the bearing can be greased during the press-fitting process, thereby effectively speeding up the production rhythm, improving production efficiency, and meeting the rapid production needs of the enterprise. The positioning sleeve can be used for positioning during the press-fitting process, thereby ensuring that the bearing is not easily offset during press-fitting and ensuring the press-fitting quality. The problem that the existing tooling can only be press-fitted, which affects the production rhythm and production efficiency, is solved.

Claims

1. A press-fit grease coating device for a steering gear housing bearing of an automobile, comprising a bracket (1), a press-fit oil cylinder (2), a press head (3), a support and positioning tool, a grease storage barrel (4) and an oil pump (5), characterized in that: A press-fitting oil cylinder (2) is arranged on the bracket (1), a pressure head (3) is arranged on the piston rod end of the press-fitting oil cylinder (2), and a supporting positioning tool is arranged on the bracket (1) below the pressure head (3); a grease storage barrel (4) is arranged on one side of the bracket (1), and an oil pump (5) is arranged on the grease storage barrel (4); the supporting positioning tool comprises a base (6) and a positioning shaft (7), the positioning shaft (7) is threadedly mounted on the middle part of the top surface of the base (6), a connecting port (8) is arranged on the bottom surface of the base (6), and the connecting port (8) is connected to the oil pump (5) through an oil pipe (9); a central countersunk hole (10) is arranged on the bottom end surface of the positioning shaft (7), and grease application holes (11) are evenly distributed on the circumference of the top end of the positioning shaft (7), and the grease application holes (11), the central countersunk hole (10), and the connecting port (8) are connected in sequence.

2. The press-fit grease coating device for a steering gear housing bearing of an automobile according to claim 1, characterized in that: A supporting sealing flange (12) is provided on the positioning shaft (7) below the grease application hole (11), and a limiting shoulder (13) is provided on the positioning shaft (7) below the supporting sealing flange (12).

3. The press-fit grease coating device for a steering gear housing bearing of an automobile according to claim 2, characterized in that: A positioning sleeve (14) is sleeved on the positioning shaft (7), and a return spring (15) is sleeved on the positioning shaft (7) between the positioning sleeve (14) and the base (6); the top end surface of the positioning sleeve (14) is abutted against the limiting shoulder (13).

4. The press-fit grease coating device for a steering gear housing bearing of an automobile according to claim 2, characterized in that: The positioning sleeve (14) is sleeved with a dust cover (16), and the dust cover (16) is fixedly connected to the base (6).

5. The press-fit grease coating device for a steering gear housing bearing of an automobile according to claim 4, characterized in that: The dust cover (16) is provided with a vent hole (17).

6. The press-fit grease coating device for a steering gear housing bearing of an automobile according to claim 1, characterized in that: The oil pipe (9) is provided with a pressure gauge (18).

7. A method for press-fitting and greasing a bearing of a steering gear housing of an automobile, characterized in that: The following steps are involved: 1) Mounting a needle roller bearing on a positioning shaft (7) of a bearing press-fit grease coating device for a steering gear housing of an automobile, so that a bottom end of the needle roller bearing abuts against a supporting sealing flange (12) of the positioning shaft (7); 2) The steering gear housing of the automobile is mounted on the support positioning tool through the support seat assembly opening, so that the positioning sleeve (14) is inserted into the support seat assembly opening; 3) starting the press-fitting oil cylinder (2), the press-fitting oil cylinder (2) presses down the automobile steering gear housing through the pressure head (3), the pressure head (3) drives the automobile steering gear housing downward under the action of hydraulic pressure, and the support seat assembly opening of the automobile steering gear housing is completely fitted on the positioning sleeve (14), and the automobile steering gear housing is positioned through the positioning sleeve (14), so as to prevent the automobile steering gear housing from deflecting during the process of press-fitting the needle roller bearing; 4) After the positioning sleeve (14) positions the steering gear housing of the automobile, the pressing head (3) continues to press the steering gear housing of the automobile, and the needle bearing is pressed upward into the steering gear housing of the automobile under the support of the positioning shaft (7); 5) When the pressure head (3) stops moving downward, control the hydraulic pressure of the press-fitting cylinder (2) to 1.8-2.4 MPa and maintain it for more than 3 seconds to eliminate stress and ensure that the press-fitting is in place; 6) After the needle roller bearing is pressed into place, start the oil pump (5) and inject the grease in the grease storage barrel (4) into the needle roller bearing in sequence through the oil pump (5), the oil pipe (9), the center counterbore (10) of the positioning shaft (7), and the grease application hole (11). During the injection process, the amount of grease applied to the needle roller bearing is adjusted by the grease pressure.

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