Cylinder sleeve concentricity perpendicularity press-fitting jig and press-fitting device

Abstract

The utility model discloses cylinder body axle sleeve concentricity perpendicularity press -mounting jig and press -mounting device, including base, locating seat, guide pillar and pressure head, locating seat installs on the base, and the upper portion of locating seat is provided with the limiting portion for limiting the position of cylinder body, the first end of guide pillar installs in the first mounting hole of locating seat, and the second end of guide pillar is exposed on the upper portion of mounting seat, the elastic part is installed between the upper end surface of base and the lower end surface of guide pillar, and the lower end surface of pressure head is provided with the press -mounting face for press -mounting axle sleeve and the positioning hole of can accommodate the second end of guide pillar, and the press -mounting face sets up in the opening of positioning hole. The utility model discloses through the designated hole of cylinder body with the sleeve of cylinder body into guide pillar after, through the limiting portion of locating seat, with the corresponding axle sleeve into guide pillar, with the upper portion of sleeve into guide pillar of pressure head, punch moves down, and the pressure head and guide pillar are driven to go down after punch and touch pressure head, and the axle sleeve is smoothly vertically press -mounting to the designated hole of cylinder body through the press -mounting face of pressure head.

Description

Technical Field

[0001] This utility model belongs to the field of press-fitting fixture technology, and more specifically, relates to a cylinder bushing concentricity and perpendicularity press-fitting fixture and press-fitting device. Background Technology

[0002] There are three main methods for press-fitting bushings and cylinder blocks: 1) cold press-fitting; 2) hot press-fitting; and 3) mechanical press-fitting without temperature regulation. The first two methods mainly utilize the principle of thermal expansion and contraction to ensure that the bushing is tightly embedded in the cylinder block; while the third method does not require ambient temperature regulation, but requires matching fixtures and press-fitting devices, and has low environmental requirements. There is an urgent need for press-fitting fixtures that are simple in structure, easy to maintain, and have low maintenance costs. Utility Model Content

[0003] The main purpose of this utility model is to provide a cylinder bushing concentricity and perpendicularity press-fitting fixture and press-fitting device, which presses the bushing into the cylinder body in a semi-automatic manner. It has a simple structure and low maintenance cost.

[0004] According to a first aspect of the present invention, a cylinder block bushing concentricity and perpendicularity press-fitting fixture is provided, comprising: A base for mounting onto a workbench; A positioning seat is mounted on a base, and a limiting part for limiting the position of the cylinder is provided on the upper part of the positioning seat; The guide post has its first end installed in the first mounting hole of the positioning seat, and its second end exposed on the upper part of the mounting seat. An elastic element is installed between the upper end face of the base and the lower end face of the guide post, and the elastic element can drive the guide post to move along the first mounting hole. The pressure head has a pressure-fitting surface on its lower end face for pressing the bushing and a positioning hole for accommodating the second end of the guide post. The pressure-fitting surface is located next to the opening of the positioning hole.

[0005] In a specific embodiment of this utility model, the limiting part includes a first limiting surface disposed on the top of the positioning seat.

[0006] In a specific embodiment of this utility model, the limiting part includes a second limiting surface disposed on the side wall of the positioning seat, and the second limiting surface is disposed below the first limiting surface.

[0007] In a specific embodiment of this utility model, the first mounting hole includes a first hole and a second hole located above the first hole, the inner diameter of the first hole is larger than the inner diameter of the second hole, and a shoulder between the first hole and the second hole forms a third limiting surface. The guide post includes a first guide post portion and a second guide post portion located above the first guide post portion, the outer diameter of the first guide post portion is larger than the outer diameter of the second guide post portion, and a shoulder between the first guide post portion and the second guide post portion forms a fourth limiting surface.

[0008] In a specific embodiment of this utility model, a second mounting hole is provided at the lower end of the first guide post, the upper end of the elastic member extends into the second mounting hole, and the lower end of the elastic member presses against the upper end surface of the mounting base.

[0009] In a specific embodiment of this utility model, the pressing surface includes a bushing pressing surface protruding from the lower end face of the pressing head and a cylinder limiting surface located outside the bushing pressing surface, wherein the cylinder limiting surface is disposed on the lower end face of the pressing head.

[0010] In a specific embodiment of this utility model, the upper end of the pressure head is provided with an arc-shaped surface, and the arc-shaped surface is smoothly connected to the upper end surface of the pressure head.

[0011] According to a second aspect of the present invention, a press-fitting device is provided, including a frame, a press-fitting power unit, and a cylinder bushing concentricity and perpendicularity press-fitting fixture. The frame is provided with a worktable, and a base is detachably mounted on the worktable. The press-fitting power unit is located on the frame and above the worktable. A punch is mounted on the actuating end of the press-fitting power unit. The press-fitting power unit can drive the punch to move downward in the direction of the press head. The lower end face of the punch is provided with a receiving hole that can accommodate the upper end of the press head.

[0012] In a specific embodiment of this utility model, a switch button for controlling the working status of the pressing power device is installed on the frame.

[0013] One of the above-mentioned technical solutions of this utility model has at least one of the following advantages or beneficial effects: This utility model, after fitting the cylinder body into the guide post through the designated hole of the cylinder body, limits the position of the corresponding bushing by the limiting part of the positioning seat, places the bushing into the guide post, and inserts the pressure head into the upper part of the guide post. The punch moves downward, and after the punch touches the pressure head, it drives the pressure head and guide post downward. The pressure head presses the bushing smoothly and vertically into the designated hole of the cylinder body through the pressing surface. After the bushing is pressed in, the punch moves upward, and the guide post returns to its original position under the action of the elastic element. The operator first removes the pressure head, and then removes the cylinder body from the guide post. This utility model has a simple structure, the bushing can be smoothly and vertically pressed into the cylinder body, the operation is simple and convenient, and the maintenance cost is low. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a front view of the fixture in one embodiment of the present invention; Figure 2 yes Figure 1 Sectional view along the middle AA direction; Figure 3 This is a schematic diagram of the pressure head in one embodiment of the present invention; Figure 4 This is a schematic diagram of the frame structure in one embodiment of the present invention. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0016] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more features.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection or a connection that can communicate with each other; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements, an indirect connection, or an interaction between two elements.

[0020] The following disclosure provides many different implementation methods or examples for different solutions to implement this utility model.

[0021] Reference Figures 1 to 4 As shown, the press-fitting device includes a frame, a press-fitting power unit, and a press-fitting fixture for ensuring the concentricity and perpendicularity of the cylinder block bushing. The press-fitting fixture for ensuring the concentricity and perpendicularity of the cylinder block bushing includes: Base 10; Positioning seat 11, which is mounted on base 10, and the upper part of the positioning seat 11 is provided with a limiting part for limiting the position of the cylinder body; Guide post 12, the first end of which is installed in the first mounting hole of the positioning seat 11, and the second end of which is exposed on the upper part of the mounting seat; An elastic element is installed between the upper end face of the base 10 and the lower end face of the guide post 12, and the elastic element can drive the guide post 12 to move along the first mounting hole. The pressure head 13 has a pressure-fitting surface for pressing the bushing and a positioning hole 131 for accommodating the second end of the guide post 12 on its lower end face. The pressure-fitting surface is located next to the opening of the positioning hole 131.

[0022] The frame is provided with a worktable, and the base 10 is detachably mounted on the worktable. The pressing power device is set on the frame and located above the worktable. The actuating end of the pressing power device is equipped with a punch. The pressing power device can drive the punch to move downward towards the pressing head 13. The lower end face of the punch is provided with a receiving hole that can accommodate the upper end of the pressing head 13.

[0023] The instruction manual is required. The positioning seat 11 and the base 10 are mounted on the worktable by bolts. The press-fitting power device can be a hydraulic cylinder or a pneumatic cylinder. The elastic element is preferably a spring.

[0024] In one embodiment of this utility model, a switch button for controlling the working status of the pressing power device is installed on the frame.

[0025] This invention involves inserting the cylinder body into the guide post 12 through a designated hole in the cylinder body, then limiting the position of the cylinder by the positioning seat 11, and finally placing the corresponding bushing into the guide post 12. The pressure head 13 is then inserted into the upper part of the guide post 12. When the operator presses a switch button, the pressing power device drives the punch to move downwards. After the punch contacts the pressure head 13, it drives the pressure head 13 and the guide post 12 downwards, pressing the bushing into the designated hole in the cylinder body through the pressing surface. After the bushing is pressed in, the punch moves upwards, and the guide post 12 returns to its original position under the action of the elastic element. The operator then removes the pressure head 13 and then removes the cylinder body from the guide post 12. This invention has a simple structure, allows the bushing to be smoothly and vertically pressed into the cylinder body, is easy and convenient to operate, and has low maintenance costs.

[0026] In one embodiment of this utility model, the limiting part includes a first limiting surface 111 disposed on the top of the positioning seat 11. It should be noted that the first limiting surface 111 contacts the end face of the designated hole in the cylinder body. During the press-fitting process, the maximum downward stroke of the bushing is also limited.

[0027] In one embodiment of this utility model, the limiting part includes a second limiting surface 112 disposed on the side wall of the positioning seat 11, and the second limiting surface 112 is disposed below the first limiting surface 111. The second limiting surface 112 contacts the cylinder body, and the first limiting surface 111 and the second limiting surface 112 limit the stroke position of the cylinder body, which facilitates the press-fitting of the bushing.

[0028] In one embodiment of this utility model, the first mounting hole includes a first hole and a second hole located above the first hole. The inner diameter of the first hole is larger than the inner diameter of the second hole. A shoulder between the first hole and the second hole forms a third limiting surface. The guide post 12 includes a first guide post portion and a second guide post portion located above the first guide post portion. The outer diameter of the first guide post portion is larger than the outer diameter of the second guide post portion. A shoulder between the first guide post portion and the second guide post portion forms a fourth limiting surface. When the elastic element returns to its original position, the fourth limiting surface and the third limiting surface contact each other to prevent the guide post 12 from disengaging from the mounting base.

[0029] In a specific embodiment of this utility model, a second mounting hole 121 is provided at the lower end of the first guide post, and the upper end of the elastic member extends into the second mounting hole 121. The lower end of the elastic member presses against the upper surface of the mounting base, which facilitates the installation and replacement of the elastic member.

[0030] In one embodiment of this utility model, the pressing surface includes a bushing pressing surface 132 protruding from the lower end face of the pressing head 13 and a cylinder limiting surface 133 located outside the bushing pressing surface 132. The cylinder limiting surface 133 is disposed on the lower end face of the pressing head 13. Specifically, the lower end face of the pressing head 13 is provided with an annular protrusion, and the bushing pressing surface 132 is the lower end face of the annular protrusion. During the pressing process, the bushing pressing surface 132 contacts the bushing. Under the drive of the punch, the pressing head 13 presses the bushing into the designated hole. When the cylinder limiting surface 133 contacts the cylinder, the pressing is completed. The distance between the bushing and the designated hole of the cylinder is the height of the annular protrusion, so as to form an oil groove between the cylinder and the bushing.

[0031] In one embodiment of this utility model, the upper end of the pressure head 13 is provided with an arc-shaped surface 134, which is smoothly connected to the upper end surface of the pressure head 13. Naturally, the receiving hole of the punch is adapted to the shape of the upper end of the pressure head 13.

[0032] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cylinder block bushing concentricity and perpendicularity press-fit fixture, characterized in that, include: A base for mounting onto a workbench; A positioning seat is mounted on a base, and a limiting part for limiting the position of the cylinder is provided on the upper part of the positioning seat; The guide post has its first end installed in the first mounting hole of the positioning seat, and its second end exposed on the upper part of the mounting seat. An elastic element is installed between the upper end face of the base and the lower end face of the guide post, and the elastic element can drive the guide post to move along the first mounting hole. The pressure head has a pressure-fitting surface on its lower end face for pressing the bushing and a positioning hole for accommodating the second end of the guide post. The pressure-fitting surface is located next to the opening of the positioning hole.

2. The cylinder block bushing concentricity and perpendicularity press-fit fixture according to claim 1, characterized in that, The limiting part includes a first limiting surface disposed on the top of the positioning seat.

3. The cylinder block bushing concentricity and perpendicularity press-fit fixture according to claim 2, characterized in that, The limiting part includes a second limiting surface disposed on the side wall of the positioning seat, and the second limiting surface is disposed below the first limiting surface.

4. The cylinder block bushing concentricity and perpendicularity press-fit fixture according to claim 1, characterized in that, The first mounting hole includes a first hole and a second hole located above the first hole. The inner diameter of the first hole is larger than the inner diameter of the second hole. A shoulder between the first hole and the second hole forms a third limiting surface. The guide post includes a first guide post portion and a second guide post portion located above the first guide post portion. The outer diameter of the first guide post portion is larger than the outer diameter of the second guide post portion. A shoulder between the first guide post portion and the second guide post portion forms a fourth limiting surface.

5. The cylinder block bushing concentricity and perpendicularity press-fit fixture according to claim 4, characterized in that, The lower end of the first guide post is provided with a second mounting hole, the upper end of the elastic element extends into the second mounting hole, and the lower end of the elastic element presses against the upper end surface of the mounting base.

6. The cylinder block bushing concentricity and perpendicularity press-fit fixture according to claim 1, characterized in that, The pressing surface includes a bushing pressing surface that protrudes outward from the lower end face of the pressing head and a cylinder limiting surface located outside the bushing pressing surface. The cylinder limiting surface is disposed on the lower end face of the pressing head.

7. The cylinder block bushing concentricity and perpendicularity press-fit fixture according to claim 1, characterized in that, The upper end of the pressure head is provided with an arc-shaped surface, which is smoothly connected to the upper end surface of the pressure head.

8. A pressing device, characterized in that, The device includes a frame, a press-fitting power unit, and a cylinder block bushing concentricity and perpendicularity press-fitting fixture as described in any one of claims 1 to 7. The frame is provided with a worktable, and a base is detachably mounted on the worktable. The press-fitting power unit is located on the frame and above the worktable. A punch is mounted on the actuating end of the press-fitting power unit. The press-fitting power unit can drive the punch to move downward in the direction of the press head. The lower end face of the punch is provided with a receiving hole that can accommodate the upper end of the press head.

9. The pressing device according to claim 8, characterized in that, The frame is equipped with a switch button to control the working status of the pressing power device.

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