Large-size framework oil seal assembly tool

Abstract

A large-size framework oil seal assembly tool comprises a pressing sleeve capable of being in clearance fit with a counter bore in the end face of a hub, a framework oil seal is hooped on the pressing sleeve and arranged on the end face of the counter bore, and the large-size framework oil seal assembly tool is characterized by further comprising a bearing plate connected with a hydraulic puller, the bearing plate stretches across the pressing sleeve and is fixedly connected with the end face of the hub, and the hydraulic puller penetrates through the bearing plate to abut against the pressing sleeve. The pressing sleeve pushes the framework oil seal to be pressed into the counter bore along with downward pressing of the hydraulic puller. The press-fitting process is easy to operate, a hub does not need to be moved, a small-tonnage hydraulic puller is used for pressing the pressing sleeve downwards, stress is even, the framework oil seal cannot be damaged, it can be guaranteed that the framework oil seal is pressed in place, the convenience and reliability of framework oil seal assembly are improved, convenient and reliable press-fitting of a large-size framework oil seal is achieved, and the production efficiency is improved. The probability of water inflow and lubrication failure of the hub bearing caused by improper installation of the framework oil seal is reduced, and the sealing reliability of the framework oil seal is improved.

Description

Technical Field

[0001] The utility model relates to an assembly tool for a large-size skeleton oil seal, which is used for press-fitting the large-size skeleton oil seal. Background Art

[0002] The skeleton oil seal provides sealing for the hub bearing. Generally, the skeleton oil seal consists of a metal ring and a rubber layer vulcanized on the metal ring. When the hub is larger, the size of the skeleton oil seal used is correspondingly larger. If a press machine is used to press-fit the skeleton oil seal, it is necessary to move the larger-size hub to the press for press-fitting, which is difficult to operate and very inconvenient. If a manual tooling is directly used for assembly, a hammer or a copper hammer is mostly used, and the skeleton oil seal is pressed down by hammering the pressing sleeve. During the press-fitting process, not only is it easy to scratch the sealing structure of the oil seal, but also it is easy to cause misassembly due to uneven force. The skeleton oil seal of the hub bearing plays a crucial role in ensuring that the lubricating grease inside the bearing does not leak and external impurities do not invade. Improper installation of the skeleton oil seal reduces the sealing reliability and easily causes water ingress and lubrication failure of the hub bearing. Therefore, the purpose of this solution is to achieve convenient and reliable press-fitting of the large-size skeleton oil seal. Summary of the Utility Model

[0003] The assembly tool for the large-size skeleton oil seal provided by the utility model has a simple operation process during press-fitting, does not require moving the hub, uses a small-tonnage hydraulic puller to press down the pressing sleeve, has uniform force and will not damage the skeleton oil seal, can ensure that the skeleton oil seal is press-fitted in place, improves the convenience and reliability of the assembly of the skeleton oil seal, realizes convenient and reliable press-fitting of the large-size skeleton oil seal, reduces the probability of water ingress and lubrication failure of the hub bearing caused by improper installation of the skeleton oil seal, and improves the sealing reliability of the skeleton oil seal.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The assembly tool for the large-size skeleton oil seal includes a pressing sleeve that can be in clearance fit with the counterbore on the end face of the hub. The skeleton oil seal is sleeved on the pressing sleeve and placed on the end face of the counterbore. It is characterized in that: it further includes a bearing plate connected to the hydraulic puller. The bearing plate straddles the pressing sleeve and is fixedly connected to the end face of the hub. The hydraulic puller passes through the bearing plate and abuts against the pressing sleeve. The pressing sleeve pushes the skeleton oil seal into the counterbore as the hydraulic puller presses down.

[0006] Preferably, the pressing sleeve consists of an upper disc that can be in clearance fit with the counterbore and a lower sleeve integrally formed at the bottom of the upper disc. The outer diameter of the lower sleeve is smaller than the inner diameter of the hub, and the skeleton oil seal is sleeved on the lower sleeve.

[0007] Preferably, the load-bearing plate is strip-shaped, and feet are provided at the bottoms of both ends of the load-bearing plate. Connection holes corresponding to the screw holes on the end face of the hub are opened at both ends of the load-bearing plate, and the connection holes penetrate through the feet. Bolts pass through the connection holes and are fastened in the screw holes on the end face of the hub. The distance between the two feet is equal to the diameter of the counterbore hole.

[0008] Preferably, a threaded hole is opened at the center of the load-bearing plate, and the hydraulic puller is threadedly fitted through the threaded hole.

[0009] Preferably, weight-reducing holes are opened on both the upper disc and the load-bearing plate.

[0010] The beneficial effects of the present utility model are as follows:

[0011] For the large-size skeleton oil seal assembly tooling of the present utility model, before press-fitting, the skeleton oil seal sleeved on the pressing sleeve is placed on the end face of the counterbore hole, then the load-bearing plate is spanned across the pressing sleeve and the load-bearing plate is fixedly connected to the end face of the hub. Then, the hydraulic puller is connected to the load-bearing plate and the hydraulic puller is abutted against the pressing sleeve. Then, the hydraulic puller is started to press down the pressing sleeve, and the skeleton oil seal is gradually pressed into the counterbore hole by pushing the pressing sleeve. After the press-fitting is in place, the hydraulic puller, the load-bearing plate and the pressing sleeve are disassembled in sequence; since the hydraulic puller is connected to the load-bearing plate, and the load-bearing plate is fixedly connected to the end face of the hub, the reaction force when the hydraulic puller presses down will act on the load-bearing plate and be transmitted to the hub, which can ensure the structural stability during press-fitting. The operation during the press-fitting process is simple, there is no need to move the hub, and a small-tonnage hydraulic puller is used to press down the pressing sleeve, with uniform force and no damage to the skeleton oil seal, which can ensure that the skeleton oil seal is press-fitted in place, improve the convenience and reliability of the skeleton oil seal assembly, realize the convenient and reliable press-fitting of the large-size skeleton oil seal, reduce the probability of water ingress and lubrication failure of the hub bearing due to improper installation of the skeleton oil seal, and improve the sealing reliability of the skeleton oil seal. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the cooperation between the large-size skeleton oil seal assembly tooling and the hub in the specific embodiment.

[0013] Figure 2 It is a schematic diagram of the pressing sleeve.

[0014] Figure 3 It is a schematic diagram of the load-bearing plate.

[0015] Figure 4 It is a top view of the load-bearing plate

[0016] Figure 5 It is a schematic diagram of the hub. Specific Embodiment

[0017] The following Figures 1 to 5 will make a detailed description of the embodiments of the present utility model.

[0018] Large-size skeleton oil seal assembly tooling, including a pressing sleeve 1 that can be in clearance fit with the counterbore 101 on the end face of the hub 100. The skeleton oil seal 102 is sleeved on the pressing sleeve 1 and placed on the end face of the counterbore 101. It is characterized in that: it also includes a bearing plate 2 connected to a hydraulic puller 3. The bearing plate 2 straddles the pressing sleeve 1 and is fixedly connected to the end face of the hub 100. The hydraulic puller 3 passes through the bearing plate 2 and abuts against the pressing sleeve 1. As the hydraulic puller 3 presses down, the pressing sleeve 1 pushes the skeleton oil seal 102 into the counterbore 101.

[0019] For the above-mentioned large-size skeleton oil seal assembly tooling, before pressing, place the skeleton oil seal 102 sleeved on the pressing sleeve 1 on the end face of the counterbore 101, then straddle the bearing plate 2 on the pressing sleeve 1 and fixedly connect the bearing plate 2 to the end face of the hub 100. Then connect the hydraulic puller 3 to the bearing plate 2 and make the hydraulic puller 3 abut against the pressing sleeve 1. Then start the hydraulic puller 3 to press down the pressing sleeve 1, and push the skeleton oil seal 102 into the counterbore 101 gradually through the pressing sleeve 1. After the pressing is in place, disassemble the hydraulic puller 3, the bearing plate 2 and the pressing sleeve 1 in sequence; because the hydraulic puller 3 is connected to the bearing plate 2, and the bearing plate 2 is fixedly connected to the end face of the hub 100, the reaction force when the hydraulic puller 3 presses down will act on the bearing plate 2 and be transmitted to the hub 100, which can ensure the structural stability during pressing. The pressing process is simple to operate, without moving the hub. Use a small-tonnage hydraulic puller 3 to press down the pressing sleeve 2, with uniform force and no damage to the skeleton oil seal 102, which can ensure that the skeleton oil seal 102 is pressed in place, improve the convenience and reliability of the skeleton oil seal assembly, realize the convenient and reliable pressing of the large-size skeleton oil seal, reduce the probability of water ingress and lubrication failure of the hub bearing due to improper installation of the skeleton oil seal, and improve the sealing reliability of the skeleton oil seal.

[0020] Among them, the pressing sleeve 1 is composed of an upper disc 11 that can be in clearance fit with the counterbore 101 and a lower sleeve 12 integrally formed at the bottom of the upper disc 11. The outer diameter of the lower sleeve 12 is smaller than the inner diameter of the hub. The skeleton oil seal 102 is sleeved on the lower sleeve 12. The skeleton oil seal 102 is sleeved on the lower sleeve 12 through the outer rubber layer. Before pressing, the skeleton oil seal 102 is placed on the upper end face of the counterbore 101. During pressing, the downward pressure of the hydraulic puller 3 gradually presses the pressing sleeve 1 and the skeleton oil seal 102 into the counterbore 101. The pressing sleeve 1 is in clearance fit with the counterbore 101 and does not contact the inner wall of the counterbore 101. When the skeleton oil seal 102 is pressed to the counterbore surface of the counterbore, the pressing is in place. The outer diameter of the lower sleeve 12 is smaller than the inner diameter of the hub, and the lower sleeve 12 will not contact the inner wall of the hub and will not interfere with the pressing of the skeleton oil seal 102.

[0021] Among them, the load-bearing plate 2 is strip-shaped. At the bottoms of both ends of the load-bearing plate 2, there are supporting feet 21. Connecting holes 22 corresponding to the screw holes 103 on the hub end face are opened at both ends of the load-bearing plate 2. The connecting holes 22 penetrate through the supporting feet 21. Bolts 4 pass through the connecting holes 22 and are fastened in the screw holes 103 on the hub end face. The distance between the two supporting feet 21 is equal to the diameter of the counterbore 101. The supporting feet 21 are placed on the hub end face to form the fixed connection between the load-bearing plate 2 and the hub end face by connecting the bolts 4 with the screw holes 103 on the hub end face. The two supporting feet 21 straddle the pressure sleeve 1 and support the load-bearing plate 2 above the pressure sleeve 1. The load-bearing plate 2 connects the hydraulic puller 3 and the hub 100, so that the reaction force generated by the downward pressure of the hydraulic puller 3 acts on the hub 100 through the bolts 4. During the downward pressing process of the hydraulic puller 3, the load-bearing plate 2 is fastened to the hub 100 by the bolts 4 and will not be separated from the hub 100 due to the reaction force generated by the downward pressure of the hydraulic puller 3, ensuring the structural stability during the pressing process. The distance between the two supporting feet 21 is equal to the diameter of the counterbore 101. The two supporting feet 21 and the inner wall of the counterbore guide the downward pressing of the pressure sleeve 1 together, effectively preventing the pressure sleeve 1 from tilting during the downward pressing process and improving the pressing reliability.

[0022] Among them, a threaded hole 23 is opened at the center of the load-bearing plate 2. The hydraulic puller 3 is threadedly fitted and passes through the threaded hole 23. Through the threaded fit between the hydraulic puller 3 and the threaded hole 23, the connection between the hydraulic puller 3 and the load-bearing plate 2 is formed. The hydraulic puller 3 passes through the threaded hole 23, and its ejecting end abuts against the pressure sleeve 1. As the ejecting end of the hydraulic puller 3 ejects downward, the pressure sleeve 1 is pressed downward. And the threaded connection between the hydraulic puller 3 and the load-bearing plate 2 enables the reaction force generated by the downward ejection of the hydraulic puller 3 to be transmitted to the hub 100 through the bolts 4.

[0023] Among them, weight-reducing holes A are opened on both the upper disc 11 and the load-bearing plate 2. The weights of the pressure sleeve 1 and the load-bearing plate 2 are reduced, facilitating handling.

[0024] The technical solutions of the embodiments of the present invention are completely described above in conjunction with the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

Claims

1. A large-size skeleton oil seal assembly tooling includes a press sleeve that can be matched with the clearance of the countersunk hole on the end face of the hub. The skeleton oil seal sleeve is clamped on the press sleeve and placed on the end face of the countersunk hole. The characteristics are: It also includes a load-bearing plate connected to the hydraulic puller, which spans the pressing sleeve and is fixed to the end face of the wheel hub. The hydraulic puller passes through the load-bearing plate and rests on the pressing sleeve. The pressing sleeve pushes the skeleton oil seal into the sinking platform hole as the hydraulic puller presses downward.

2. The large-size skeleton oil seal assembly tool according to claim 1, characterized in that: The press sleeve is composed of an upper disc which can be matched with the clearance of the sink hole and a lower sleeve which is integrally formed at the bottom of the upper disc. The outer diameter of the lower sleeve is smaller than the inner diameter of the wheel hub, and the skeleton oil seal sleeve is clamped on the lower sleeve.

3. The large-size skeleton oil seal assembly tool according to claim 1, characterized in that: The load-bearing plate is in the shape of an elongated strip, and has supporting feet at the bottoms of both ends of the load-bearing plate. Connecting holes corresponding to the screw holes on the end face of the wheel hub are opened at both ends of the load-bearing plate. The connecting holes pass through the supporting feet, and the bolts pass through the connecting holes and are fastened in the screw holes on the end face of the wheel hub. The distance between the two supporting feet is equal to the diameter of the countersunk hole.

4. The large-size skeleton oil seal assembly tool according to claim 2, characterized in that: A threaded hole is provided at the center of the load-bearing plate, and the hydraulic puller thread fits through the threaded hole.

5. The large-size skeleton oil seal assembly tool according to claim 4, characterized in that: The upper disc and the load-bearing plate are both provided with weight-reducing holes.

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