Pressure control type oil seal assembling tool

Abstract

The utility model relates to the technical field of oil seal installation, in particular to a pressure control type oil seal assembling tool which comprises a guide sleeve, a pressing rod is movably arranged at the left end of the guide sleeve, and a compression spring and a spring seat are arranged in the guide sleeve. The left end of the compression spring abuts against the end of the pressing rod, and the right end of the compression spring is arranged in the spring seat. The spring seat is connected with a pressure head. According to the utility model, the installation precision can be ensured, and the low-cost and high-quality production of the installation of the oil seal can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil seal installation technical field, specifically a pressure control type oil seal assembly tool, and oil seal installation technical field includes the rotation shaft oil seal installation of hydraulic pump, hydraulic motor and other hydraulic components of engineering machinery, agricultural machinery and the like field. BACKGROUND

[0002] The existing oil seal installation technology has two kinds of stroke control type oil seal assembly tool and method and servo press mounting control type installation method.

[0003] The stroke control type oil seal assembly tool and method are characterized by: through the size chain calculation of oil seal and related installation groove size, the adaptive stroke control type oil seal assembly tool is finally designed.This method is applicable to the simple size chain, when the size chain of oil seal installation cavity is complex, the design and processing precision of tool is very high, and in some complex size chain conditions, the installation precision of oil seal cannot be ensured by controlling the design and processing precision of installation tool.

[0004] The servo press mounting control type installation method is characterized by: this method can realize the real-time monitoring of pressure and press mounting stroke in the oil seal installation process, and the final oil seal press mounting result is determined through specific determination conditions, and the design and processing of press mounting tool are not high, but the equipment cost of realizing this approach is high, and general enterprises cannot popularize this oil seal installation method. SUMMARY

[0005] The utility model aims at the size sensitivity of stroke control type oil seal assembly tool to oil seal installation, provides a pressure control type oil seal assembly tool, through the utility model, installation precision can be guaranteed, and the installation of oil seal realizes low cost and high quality production.

[0006] The utility model provides the following technical scheme to realize the above-mentioned purpose:

[0007] A pressure control type oil seal assembly tool, including guide sleeve, the left end of guide sleeve movably is provided with pressure rod, and the inside of guide sleeve is provided with compression spring and spring seat;The left end of compression spring abuts at the end of pressure rod, and the right end is in spring seat;Spring seat connects pressure head.

[0008] In the foregoing pressure control type oil seal assembly tool, the spring seat is connected with the pressure head through the inner hexagonal screw.

[0009] In the foregoing pressure control type oil seal assembly tool, the left end of guide sleeve is installed with snap spring.

[0010] In the foregoing pressure control type oil seal assembly tool, the pressure rod includes a rod, the left end of the rod is connected with the outer pressure disc arranged outside the guide sleeve, and the right end of the rod is connected with the inner pressure disc arranged between the snap spring and the compression spring.

[0011] The outer pressure disc has an area greater than that of the left end of the guide sleeve.

[0012] The guide sleeve comprises a guide sleeve body, a guide sleeve guide section and a guide sleeve mounting groove from left to right.

[0013] The pressure head is slidably arranged in the guide sleeve guide section.

[0014] The right end of the pressure head is provided with an oil seal mounting head.

[0015] The guide sleeve mounting groove is in interference fit with the oil seal outer ring.

[0016] The guide sleeve mounting groove is matched with the size and position of the mounting groove of the mounting cavity.

[0017] The above technical solution of the present application has the following beneficial effects:

[0018] The present application controls the final installation pressure of the oil seal by the compression amount of the compression spring. Before pressing, the oil seal is positioned and installed in the guide sleeve mounting groove through the outer ring, and the oil seal is coaxial with the mounting cavity through the guide sleeve outer circle. During pressing, the pressure transmission flow is single, which is from the pressing rod to the compression spring to the spring seat to the pressure head, and finally to the oil seal. In the last stage of pressing, the pressure transmission flow is two-way, one of which maintains the compression amount of the compression spring to provide stable target pressure, and the other of which unloads the excess pressure on the rigid structure of the mounting cavity through the guide sleeve.

[0019] Compared with the stroke control type oil seal assembly tool and method, the present application avoids the sensitive characteristics of the oil seal pressing size, reduces the risk of oil seal failure during installation, and improves the installation precision and reliability. Moreover, the installation tool has low design difficulty and relatively low machining precision requirement.

[0020] Compared with the servo press oil seal pressing method, the present application can realize low-cost pressure control type pressing of oil seals, which is beneficial to wide promotion. It is estimated that the cost of the present application is less than 1 / 100 of the servo press oil seal pressing method. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The figure is a structural schematic diagram of the present application;

[0022] Figure 2 The figure is a schematic diagram of force transmission flow during pressing of the present application;

[0023] Figure 3 It is the last stage force transmission flow schematic diagram of the utility model;

[0024] Mark: 1 - pressure rod;2 - clamp spring;3 - compression spring;4 - guide sleeve;5 - inner hexagonal screw;6 - spring seat;7 - pressure head;8 - oil seal;9 - installation cavity;101 - rod;102 - outer pressure disc;103 - inner pressure disc;401 - guide sleeve main body;402 - guide sleeve guide section;403 - guide sleeve installation groove;701 - oil seal installation head. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0026] Embodiment. A pressure control type oil seal assembly tool, structure reference Figure 1 As shown, the tool comprises a guide sleeve 4, a pressure rod 1 movably arranged at the left end of the guide sleeve 4, a compression spring 3 and a spring seat 6 arranged inside the guide sleeve 4;The left end of the compression spring 3 abuts against the end of the pressure rod 1, and the right end is arranged in the spring seat 6;The spring seat 6 is connected with a pressure head 7. The tool controls the pressure of the final installation of the oil seal through the compression amount of the compression spring 3.

[0027] The spring seat 6 is connected with the pressure head 7 through an inner hexagonal screw.

[0028] The clamp spring 2 is installed at the left end of the guide sleeve 4.

[0029] The pressure rod 1 comprises a rod 101, the left end of the rod 101 is connected with an outer pressure disc 102 arranged outside the guide sleeve 4, and the right end of the rod 101 is connected with an inner pressure disc 103 arranged between the clamp spring 2 and the compression spring 3.

[0030] The area of the outer pressure disc 102 is greater than the area of the left end of the guide sleeve 4, so that the excess pressure can be transmitted through the guide sleeve 4.

[0031] The guide sleeve 4 comprises a guide sleeve main body 401, a guide sleeve guide section 402 and a guide sleeve installation groove 403 from left to right.

[0032] The pressure head 7 is slidably arranged in the guide sleeve guide section 402. The right end of the pressure head 7 is provided with an oil seal installation head 701. Through the guide of the guide sleeve guide section 402 of the guide sleeve 4 and the pressure head 7, the oil seal installation head 701 is facilitated to apply pressure to the oil seal.

[0033] The guide sleeve installation groove 403 is provided in interference fit with the outer ring of the oil seal. The outer ring of the oil seal 8 is positioned and installed into the guide sleeve installation groove 403, and through the interference fit, the oil seal 8 is fixed in the installation groove, so that the oil seal 8 will not fall off even if the opening of the guide sleeve 4 is downward.

[0034] The guide sleeve installation groove 403 matches the size and position of the installation groove of the installation cavity 9. Referring to Figure 1 The guide sleeve installation groove 403 can be directly connected to the front part of the installation cavity 9, and the positions of the two installation grooves are aligned and have the same diameter. In this way, the oil seal 8 can be guided through the guide sleeve installation groove 403 and the installation groove of the installation cavity 9, thereby ensuring that the oil seal 8 is installed without deviation and preventing irreversible damage to the outer ring of the oil seal 8 during installation.

[0035] In this tool, the functions of the main parts are as follows:

[0036] The pressure rod 1 directly contacts the press and bears the pressure and limiting function; the clamping spring 2 limits the falling of the pressure rod 1; the compression spring 3 provides the target pressure for the pressure head 7; the guide sleeve 4 serves as the tool base and plays the role of guiding, bearing pressure and unloading; the internal hexagonal screw 5 has a connecting and fastening effect; the spring seat 6 receives the spring and connects the pressure head; the pressure head 7 contacts the outer ring of the oil seal and pushes the oil seal into the installation position.

[0037] The method of using the tool to install the oil seal 8 in the target position installation cavity 9 and the working principle are as follows:

[0038] The oil seal 8 is placed in the guide sleeve installation groove 403, and the guide sleeve installation groove 403 is connected to the front part of the installation cavity 9. A pneumatic press or a manual press is directly applied to the outer pressure disc 102 of the pressure rod 1, the compression spring 3 is compressed by the inner pressure disc 103 of the pressure rod 1, the pressure is applied to the oil seal 8 through the spring seat 6 and the pressure head 7, and the oil seal 8 is pushed into the installation cavity 9. When the oil seal 8 needs more pressure for installation, the compression spring 3 is continuously compressed until the bottom of the oil seal 8 is in close contact with the bottom of the installation cavity 9. At this time, the pressure rod 1 continues to move downward, and after being pressed to a certain extent, the outer pressure disc 102 of the pressure rod 1 contacts the guide sleeve 4. After the pressure rod 1 contacts the guide sleeve 4, the compression spring 3 is compressed to the target height, at which point the compression spring 3 can provide the target pressure, achieving the purpose of installing the oil seal 8 in a specific pressure control form.

[0039] Referring to Figure 2 For the force transmission flow during the pressing process of the tool, the pressure of the press is transmitted to the compression spring 3 through the pressure rod 1, and then transmitted to the pressure head 7 through the spring seat 6, and finally applied to the oil seal 8. Referring to Figure 3 For the force transmission flow in the final stage of pressing, part of the pressure of the press (target pressure value F3) maintains the compression amount of the compression spring 3, and the excess pressure F1+F2 (i.e. F-F3) is transmitted to the installation cavity 9 part through the guide sleeve 4. The installation cavity 9 part is a rigid structure and can bear the excess pressing force.

[0040] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and concept of the present application, can make equivalent replacements or changes within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A pressure controlled oil seal installation tool characterized by: It comprises a guide sleeve (4), the left end of which is movably provided with a pressing rod (1), and the inside of which is provided with a compression spring (3) and a spring seat (6); the left end of the compression spring (3) abuts against the end of the pressing rod (1), and the right end is arranged in the spring seat (6); the spring seat (6) is connected with a pressing head (7).

2. The pressure controlled oil encapsulation tooling of claim 1, wherein: The spring seat (6) is connected with the pressing head (7) through an internal hexagonal screw.

3. The pressure controlled oil encapsulation tooling of claim 1, wherein: The left end of the guide sleeve (4) is provided with a clamping spring (2).

4. The pressure controlled oil encapsulation tooling of claim 2, wherein: The pressing rod (1) comprises a rod member (101), the left end of which is connected with an outer pressing disc (102) arranged outside the guide sleeve (4), and the right end of which is connected with an inner pressing disc (103) arranged between the clamping spring (2) and the compression spring (3).

5. The pressure controlled oil encapsulation tooling of claim 4, wherein: The area of the outer pressing disc (102) is larger than that of the left end of the guide sleeve (4).

6. The pressure controlled oil encapsulation tooling of claim 1, wherein: The guide sleeve (4) comprises a guide sleeve main body (401), a guide sleeve guide section (402) and a guide sleeve mounting groove (403) from left to right.

7. The pressure controlled oil encapsulation tooling of claim 6, wherein: The pressing head (7) is slidably arranged in the guide sleeve guide section (402).

8. The pressure controlled oil encapsulation tooling of claim 7, wherein: The right end of the pressing head (7) is provided with an oil seal mounting head (701).

9. The pressure controlled oil encapsulation tooling of claim 6, wherein: The guide sleeve mounting groove (403) is arranged in interference fit with the outer ring of the oil seal.

10. The pressure controlled oil encapsulation tooling of claim 6, wherein: The guide sleeve mounting groove (403) is matched with the size and position of the mounting groove of the mounting cavity.

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