Thrust ball bearing assembly tool and assembly method thereof

Abstract

The present invention belongs to the technical field of bearing assembly, and specifically relates to a thrust ball bearing assembly tool and an assembly method thereof, comprising a support seat and a cone that slides with the support seat, the support seat is matched with the inner surface of the bearing seat ring, and the cone is matched with the inner surface of the bearing shaft ring; the cone includes a guide portion, a press-fit portion and a pressure portion that are arranged in sequence, the guide portion is slidably matched with the support seat, the press-fit portion is matched with the inner surface of the bearing shaft ring, the bearing inner cover is pressed against the inner surface of the bearing, and the pressure portion protrudes from the end face of the bearing. The bearing inner cover of the present invention is press-fitted in two steps, respectively press-fitted with the bearing seat ring and the bearing shaft ring, and the two steps of press-fitting are continuous to ensure the press-fitting quality of the inner cover. The present invention press-fits the bearing inner cover safely and stably through the cooperation of the cone and the support seat, and the press-fitting portion of the cone cooperates with the inner surface of the bearing shaft ring to avoid generating impact force and damaging the bearing, thereby ensuring the press-fitting quality of the product.

Description

Technical Field

[0001] The invention belongs to the technical field of bearing assembly, and particularly relates to a thrust ball bearing assembly tool and an assembly method thereof. Background Art

[0002] Thrust ball bearings, in which the steel balls are squeezed toward the outside of the raceway due to centrifugal force, are susceptible to scratching and are not suitable for high-speed operation. These bearings are separable bearings, meaning the seat ring, shaft ring, steel balls, and cage components are separable and can be installed and removed separately. Therefore, to ensure bearing stability during operation, inner covers are required on both sides of the bearing, integrating the seat ring, shaft ring, and steel ball cage components into a single, inseparable unit. The existing bearing inner cover assembly process struggles to ensure press-fit quality. Therefore, resolving this issue during thrust ball bearing assembly is crucial for the production of thrust ball bearings with inner covers. Summary of the Invention

[0003] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a thrust ball bearing assembly tool and an assembly method thereof, so as to ensure the press-fitting accuracy of the inner cover and improve the press-fitting quality.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a thrust ball bearing assembly tool, including a support seat and a cone that slides with the support seat, the support seat is matched with the inner surface of the bearing seat ring, and the cone is matched with the inner surface of the bearing shaft ring; the cone includes a guide part, a press-fit part and a pressure-applying part arranged in sequence, the guide part slides with the support seat, the press-fitting part is matched with the inner surface of the bearing shaft ring, the bearing inner cover is pressed against the inner surface of the bearing, and the pressure-applying part protrudes from the end face of the bearing.

[0005] Furthermore, an annular stopper that matches the inner surface of the bearing race is provided on one end surface of the support seat, and the support seat presses the bearing inner cover on the inner surface of the bearing race through the annular stopper.

[0006] Furthermore, the end surface and the side wall of the annular stop are transitioned along an arc.

[0007] Furthermore, the conical press-fitting portion cooperates with the inner surface of the bearing shaft ring and the inner surface of the retaining frame assembly, and the conical press-fitting portion and the support seat stop constitute a press-fitting structure of the inner surface of the bearing.

[0008] Furthermore, the support seat is provided with a guide hole that matches the pressing direction of the cone, and the guide part of the cone cooperates with the guide hole of the support seat for guidance; a guide sleeve is provided on the inner surface of the guide hole, and the guide part of the cone slides in the guide sleeve.

[0009] Furthermore, the surface of the pressure-applying portion of the cone is knurled.

[0010] Furthermore, the thrust ball bearing assembly tool also includes a base, which is provided with a connected recessed platform and an intermediate cavity, the recessed platform cooperates with the outer wall of the bearing seat ring, the bearing seat ring is equipped with a bearing inner cover, and the intermediate cavity forms a space for placing the bearing inner cover.

[0011] The assembly method using the above-mentioned thrust ball bearing assembly tooling includes the following steps:

[0012] Step 1: Place the bearing raceway downward into the recessed platform of the base;

[0013] Step 2: Place the bearing inner cover on the inner surface of the bearing race;

[0014] Step 3: Press-fit the bearing inner cover by matching the support seat press-fit portion with the inner surface of the bearing race, so that the bearing inner cover fits the inner surface of the bearing race;

[0015] Step 4: Turn over the base, bearing race, and support seat as a whole, and remove the base at the top;

[0016] Step 5: Install the ball retainer assembly and bearing shaft ring on the bearing race, with the bearing inner cover extending to the inner surface of the bearing shaft ring;

[0017] Step 6: Place the guide sleeve into the guide hole of the support seat so that the guide sleeve matches the guide hole of the support seat;

[0018] Step 7: Through the sliding fit of the cone guide part and the guide sleeve, the cone press-fit part fits the inner surface of the bearing shaft ring and the inner surface of the retaining frame assembly, and the bearing inner cover is press-fitted.

[0019] Furthermore, the support seat and base are made of 45 steel, which is less hard than the bearing ring to avoid damaging the bearing; the cone and guide sleeve are made of bearing steel with lower hardness.

[0020] A method for assembling a thrust ball bearing comprises the following steps:

[0021] Step 1: Press the bearing inner cover onto the inner surface of the bearing race;

[0022] Step 2: Assembling the roller, the retainer and the bearing shaft ring on the bearing race with the bearing inner cover installed to form a thrust ball bearing workpiece, wherein the bearing inner cover extends to the inner surface of the bearing shaft ring;

[0023] Step 3: Press-fit the bearing inner cover onto the inner surface of the bearing shaft ring.

[0024] The bearing inner cover of the present invention is press-fitted in two steps, and is press-fitted and fitted with the bearing seat ring and the bearing shaft ring respectively, and the two steps of press-fitting are continuous, thereby ensuring the press-fitting quality of the inner cover.

[0025] The beneficial effects of the present invention are as follows: the present invention safely and stably press-fits the bearing inner cover through the cooperation of the cone and the support seat, and the pressing portion of the cone cooperates with the inner surface of the bearing shaft ring to avoid impact force and damage to the bearing, thereby ensuring the pressing quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the first step of press assembly schematic;

[0027] Figure 2 This is a schematic diagram of the second step of press assembly;

[0028] Figure 3 A schematic diagram of step 1 of an assembly method for a thrust ball bearing assembly tool;

[0029] Figure 4 A schematic diagram of step 2 of the assembly method for the thrust ball bearing assembly tool;

[0030] Figure 5 This is a schematic diagram of step three of the assembly method for the thrust ball bearing assembly tool;

[0031] Figure 6 This is a schematic diagram of step four of the assembly method for the thrust ball bearing assembly tool;

[0032] Figure 7 A schematic diagram of step five of the assembly method for the thrust ball bearing assembly tool;

[0033] Figure 8 A schematic diagram of step six of the assembly method for the thrust ball bearing assembly tool;

[0034] Figure 9 A schematic diagram of step seven of the assembly method for the thrust ball bearing assembly tool;

[0035] In the figure: 1. Base, 2. Support seat, 3. Guide sleeve, 4. Cone, a. Cone guide part, b. Cone press-fit part, c. Cone pressure part,

[0036] 5. Thrust ball bearing seat ring, 6. Thrust ball bearing inner cover, 7. Thrust ball bearing shaft ring, 8. Thrust ball bearing steel ball retainer. DETAILED DESCRIPTION

[0037] In order to make the structure and function of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0038] See attached Figure 1-2A thrust ball bearing assembly tool includes a support seat 2 and a cone 4 that slides with the support seat. The support seat 2 is engaged with the inner surface of the bearing race 5, and the cone 4 is engaged with the inner surface of the bearing shaft ring 7. The cone 4 includes a guide portion, a press-fit portion, and a pressure portion arranged in sequence. The guide portion slides with the support seat 2, and the press-fit portion engages with the inner surface of the bearing shaft ring 7 to press the bearing inner cover 6 against the inner surface of the bearing. The pressure portion protrudes from the end face of the bearing. The thrust ball bearing assembly tool also includes a base 1. The base 1 is provided with a connected recess and an intermediate cavity. The recess engages with the outer wall of the bearing race. The bearing inner cover is assembled inside the bearing race, and the intermediate cavity forms a space for the bearing inner cover 6.

[0039] Based on the above technical solution, it should be noted that the tooling is press-fitted in two steps when in use. In the first step, the base 1 supports the bearing race 5, and the support seat 2 presses the bearing inner cover 6 onto the bearing race 5. Figure 1 As shown; the second step is to support the bearing workpiece by supporting the support seat 2, and press-fit the ball retainer assembly 8 and the bearing inner cover 6 on the inner surface of the bearing shaft ring through the cone 4 press-fit portion, such as Figure 2 As shown in the figure, the primary purpose of the second press-fitting step is to bend the edge of the inner bearing cover 6 against the small bevel of the bearing shaft washer 7, completing the installation of the inner cover 6. Therefore, the press-fitting portion of the cone 4 is a tapered surface that mates with the small bevel of the bearing shaft washer 7. The press-fitting operation is completed by the sliding guidance of the guide portion, minimizing impact and ensuring press-fit quality. The inner cover is press-fitted in two steps, pressing and fitting it against the bearing raceway and the bearing shaft washer, respectively. These two steps are continuous, ensuring a high-quality press-fit of the inner cover.

[0040] The support seat and base are made of 45 steel, which is harder than the bearing ring to avoid damaging the bearing; the cone and guide sleeve are made of bearing steel with lower hardness (harder than 45 steel and less hard than the bearing ring), which is wear-resistant and increases service life.

[0041] Furthermore, an annular stopper that matches the inner surface of the bearing race 5 is provided on one end surface of the support seat 2, and the support seat 2 presses the bearing inner cover 6 on the inner surface of the bearing race 5 through the annular stopper.

[0042] Based on the above technical solution, it should be noted that the support seat 2 cooperates with the base 1 in the first step of the press-fitting process, the base 1 supports the bearing race 5, and the support seat 2 presses the bearing inner cover 6 onto the bearing race 5. Figure 1 As shown; the support seat 2 cooperates with the cone 4 during the second step of press-fitting. At this time, the support seat 2 plays the role of supporting the bearing race 5 and the entire bearing workpiece assembled. The steel ball retainer assembly 8 and the bearing inner cover 6 on the inner surface of the bearing shaft ring are press-fitted through the cone 4, as shown Figure 2The end surface of the support seat is provided with a concave platform that can accommodate the end surface of the cone press-fitting portion, so that there is no interference between the cone press-fitting portion and the support seat, ensuring that the entire press-fitting surface can be fully transitioned and evenly pressed.

[0043] Furthermore, the transition between the end face and the side wall of the annular stopper follows an arc shape. The transition surface between the end face and the side wall of the annular stopper contacts the bearing inner cover 6 and forms part of the press-fit surface. The arc structure can ensure that the pressure on the bearing inner cover 6 is uniform and will not be damaged.

[0044] Furthermore, the press-fit portion of the cone 4 cooperates with the inner surface of the bearing shaft ring 7 and the inner surface of the retainer assembly 8. The press-fit portion of the cone 4 and the stopper of the support seat 2 form a press-fit structure for the inner surface of the bearing. Specifically, the step surface of the support seat and the stopper, the side surface of the stopper, the end surface of the stopper, and the side surface of the press-fit portion of the cone 4 together form the press-fit surface of the inner surface of the bearing.

[0045] Furthermore, the support base 2 is provided with a guide hole that aligns with the press-fitting direction of the cone 4. The guide portion of the cone 4 cooperates with the guide hole of the support base 2 for guidance. A guide sleeve 3 is provided on the inner surface of the guide hole, and the guide portion of the cone 4 slides within the guide sleeve 3. The cone 4 is guided by the guide sleeve 3 to ensure the correct position and alignment, ensuring accuracy and extending the service life of the press-fitting die.

[0046] Furthermore, the surface of the pressure-applying portion of the cone 4 is knurled to facilitate assembly and disassembly during work.

[0047] This thrust ball bearing inner cover bending die consists of four parts: a cone 4, a guide sleeve 3, a support seat 2, and a base 1. When press-fitting the inner cover 6, first place the base 1 on a workbench, then buckle the thrust ball bearing race 5 into the concave portion of the base 1 with the raceway facing downwards, place the inner cover 6, and then press-fit the inner cover 6 with the support seat 2, so that the inner cover 6 and the bearing race 5 are in contact. The entire assembly is then flipped over, with the support seat 2 at the bottom, and the base 1 removed. The ball retainer assembly 8 and the bearing shaft ring 7 are then mounted on the bearing race 5. The guide sleeve 3 is then inserted, so that the guide sleeve 3 mates with the guide hole of the support seat. Finally, the inner cover 6 is press-fitted, guided by the guide sleeve 3 and the protruding guide portion of the cone, so that the edge of the inner cover 6 is bent against the small bevel of the bearing shaft ring 7 to complete the installation of the inner cover 6.

[0048] See attached Figure 3-9 The assembly method and steps of the thrust ball bearing assembly tool are as follows:

[0049] Step 1: Place the bearing raceway downward into the recessed platform of the base;

[0050] Step 2: Place the bearing inner cover on the inner surface of the bearing race;

[0051] Step 3: Press-fit the bearing inner cover by matching the support seat press-fit portion with the inner surface of the bearing race, so that the bearing inner cover fits the inner surface of the bearing race;

[0052] Step 4: Turn over the base, bearing race, and support seat as a whole, and remove the base at the top;

[0053] Step 5: Install the ball retainer assembly and bearing shaft ring on the bearing race, with the bearing inner cover extending to the inner surface of the bearing shaft ring;

[0054] Step 6: Place the guide sleeve into the guide hole of the support seat so that the guide sleeve matches the guide hole of the support seat;

[0055] Step 7: Through the sliding fit of the cone guide part and the guide sleeve, the cone press-fit part fits the inner surface of the bearing shaft ring and the inner surface of the retaining frame assembly, and the bearing inner cover is press-fitted.

[0056] The above examples are merely preferred embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and many variations are possible. All variations that can be directly derived or imagined by a person skilled in the art from the disclosure of the present invention should be considered to be within the scope of protection of the present invention.

Claims

1. A thrust ball bearing assembly tool, characterized by: The cam is adapted to engage with the inner surface of the bearing ring and to engage with the inner surface of the retaining ring, and the guide member is adapted to engage with the inner surface of the retaining ring and to engage with the inner surface of the retaining ring.

2. The thrust ball bearing assembly tool according to claim 1, characterized in that: The support seat is provided with a guide hole that matches the press-fitting direction of the cone, and the guide part of the cone matches the guide hole of the support seat for guidance; a guide sleeve is provided on the inner surface of the guide hole, and the guide part of the cone slides in the guide sleeve.

3. The thrust ball bearing assembly tool according to claim 1, characterized in that: The surface of the pressing portion of the cone is knurled.

4. A thrust ball bearing assembly tool according to any one of claims 1 to 3, characterized in that: It also includes a base, which is provided with a connected concave platform and an intermediate cavity. The concave platform cooperates with the outer wall of the bearing seat ring. The bearing inner cover is assembled inside the bearing seat ring, and the intermediate cavity forms a space for placing the bearing inner cover.

5. The assembly method using the thrust ball bearing assembly tool as claimed in claim 4 is characterized in that: The following steps are involved: Step 1: Place the bearing raceway downward into the recessed platform of the base; Step 2: Place the bearing inner cover on the inner surface of the bearing race; Step 3: Press-fit the bearing inner cover by matching the support seat press-fit portion with the inner surface of the bearing race, so that the bearing inner cover fits the inner surface of the bearing race; Step 4: Turn over the base, bearing race, and support seat as a whole, and remove the base at the top; Step 5: Install the ball retainer assembly and bearing shaft ring on the bearing race, with the bearing inner cover extending to the inner surface of the bearing shaft ring; Step 6: Place the guide sleeve into the guide hole of the support seat so that the guide sleeve matches the guide hole of the support seat; Step 7: Through the sliding fit of the cone guide part and the guide sleeve, the cone press-fit part fits the inner surface of the bearing shaft ring and the inner surface of the retaining frame assembly, and the bearing inner cover is press-fitted.

6. The method for assembling a thrust ball bearing assembly tool according to claim 5, characterized in that: The support seat and base are made of 45 steel; the cone and guide sleeve are made of bearing steel.

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