Bushing press fitting tool

Abstract

The utility model discloses a bush press-fitting tool which comprises a base, a female guide sleeve is detachably connected to the base through a connecting plate, and a detachable and replaceable sub-positioning pin shaft used for positioning components is slidably arranged in the female guide sleeve in a sleeved mode. The middle part of the upper part of the sub-positioning pin shaft is detachably connected with a bushing positioning shaft for positioning a bushing, an elastic piece is arranged between the lower end of the sub-positioning pin shaft and the base, and the sub-positioning pin shaft sequentially comprises a positioning part, a positioning part and a positioning part from top to bottom, the outer side of the positioning part is used for sleeving a component, and the diameter of the positioning part is determined according to an inner hole of the component needing to be sleeved; the sliding part extends into the female guide sleeve and is in sliding fit with the female guide sleeve; and the diameter of the stop part is greater than that of the sliding part. Therefore, when the inner hole of the component is changed, only the secondary positioning pin shaft of the positioning part with the diameter meeting the condition needs to be replaced, the primary guide sleeve does not need to be replaced, replacement is convenient, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of bushing press-fitting, in particular to a bushing press-fitting tool. Background Art

[0002] In recent years, with the vigorous development of the new energy vehicle industry, the research and development of auto parts has also developed. For example, some auto parts often have special requirements for parts that need to be made of different materials from the main body to achieve special purposes, such as improving local strength, high wear resistance, high stability, etc. Commonly used structures include pressing a bushing made of non-component materials into the inner hole of the component. For example, pressing in a copper sleeve can increase wear resistance, and pressing in a steel sleeve can increase mechanical strength. In the process of pressing the bushing into the inner hole of the component, a pressing tool is required. The pressing tool includes a bushing locating shaft. Generally, the bushing is first placed on the bushing locating shaft, and the component is placed on the component locating shaft below the bushing. The component locating shaft extends into the guide sleeve for sliding fit, and then the bushing is pressed into the inner hole of the component below by a press.

[0003] Since the inner diameters of the inner holes of various components are different, but the diameter of the component positioning shaft used by the current press-in tooling for positioning the components is fixed, if the inner hole of the component changes, a new component positioning shaft needs to be replaced, and the guide sleeve that cooperates with the component positioning shaft also needs to be replaced at the same time. The replacement is complicated, time-consuming and labor-intensive. Utility Model Content

[0004] In order to solve the technical problems existing in the background technology, the utility model proposes a press-fit bushing tool.

[0005] The utility model proposes a press-fit bushing tool, comprising a base, a female guide sleeve detachably connected to the base via a connecting plate, a sliding sleeve inside the female guide sleeve provided with a detachable and replaceable sub-positioning pin shaft for positioning a component, a bushing positioning shaft for positioning the bushing detachably connected to the upper middle portion of the sub-positioning pin shaft, an elastic member provided between the lower end and the base, and the tool comprises, from top to bottom:

[0006] The outer side of the positioning part is used for sleeve components, and its diameter is determined according to the inner hole of the required sleeve component;

[0007] A sliding portion extending into the female guide sleeve for sliding engagement;

[0008] The diameter of the stopping portion is larger than the diameter of the sliding portion.

[0009] Preferably, the female guide sleeve includes an upper sleeve and a lower sleeve from top to bottom, the diameter of the upper sleeve is smaller than the diameter of the lower sleeve, the positioning portion is located at the upper end of the upper sleeve, the sliding portion extends into the inner wall of the inner hole of the upper sleeve for sliding fit, the stop portion is located at the lower end of the inner hole of the upper sleeve, and a fixing hole is provided at the lower end of the sub-positioning pin shaft, the upper end of the elastic member is fixed to the upper wall of the fixing hole, and the lower end is fixed to the connecting plate.

[0010] Preferably, a threaded hole is provided in the middle of the upper portion of the sub-positioning pin shaft, the bushing positioning shaft is threadedly connected to the threaded hole, and in the initial state, the upper end surface of the bushing positioning shaft is higher than the upper end surface of the sub-positioning pin shaft.

[0011] Preferably, an avoidance hole is further provided at the upper end of the positioning portion and located on the outer periphery of the threaded hole, and the diameter of the avoidance hole is larger than the diameter of the threaded hole.

[0012] Preferably, the elastic member is configured as a spring.

[0013] Preferably, a spring positioning block is fixed on the connecting plate, and the lower end of the spring is sleeved and fixed on the spring positioning block.

[0014] Preferably, the lower end of the female guide sleeve is fixed to the connecting plate by a connecting bolt.

[0015] To sum up, the utility model has the following beneficial effects: this scheme uses a detachable and replaceable sub-positioning pin shaft, and the inner hole diameter of the female guide sleeve and the sub-positioning pin shaft that slides together is fixed, and the sliding part diameter of each sub-positioning pin shaft is also fixed, and the diameter of the positioning part of each sub-positioning pin shaft is determined according to the inner hole of the required sleeve component. Therefore, when the inner hole of the component changes, it is only necessary to replace the sub-positioning pin shaft of the positioning part whose diameter meets the conditions, and there is no need to replace the female guide sleeve. It is convenient to replace, saves time and effort, and can achieve rapid changeover. It has high switching efficiency and low economic cost. While greatly improving the switching time, it can also ensure the improvement of the positioning accuracy of the sub-positioning pin shaft and the female guide sleeve.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a press-fit bushing tooling with a positioning portion having a diameter of 40 mm in Example 1 of the present utility model;

[0018] Figure 2 This is a structural diagram of a press-fit bushing tooling with a positioning portion having a diameter of 34 mm in Example 2 of the present utility model;

[0019] Figure 3 This is a structural diagram of a sub-positioning pin shaft with a positioning portion diameter of 40 mm in Example 1;

[0020] Figure 4 This is a structural diagram of the sub-positioning pin shaft with a positioning portion diameter of 34 mm in Example 2.

[0021] In the picture:

[0022] 1. Bushing positioning shaft;

[0023] 2. Sub-positioning pin; 21. Positioning portion; 22. Sliding portion; 23. Stop portion;

[0024] 3. Female guide sleeve; 31. Upper sleeve; 32. Lower sleeve;

[0025] 4. Connecting plate; 5. Base; 6. Connecting bolt; 7. Bushing; 8. Spring; 9. Spring positioning block; 10. Avoidance hole. DETAILED DESCRIPTION

[0026] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention, and should not be construed as limiting the present invention.

[0027] like Figure 1-4 As shown, a press-fit bushing tool proposed in this embodiment includes a base 5, a female guide sleeve 3 is detachably connected to the base 5 through a connecting plate 4, a sliding sleeve in the female guide sleeve 3 is provided with a detachable and replaceable sub-positioning pin 2 for positioning components, a bushing positioning shaft 1 for positioning the bushing 7 is detachably connected to the upper middle part of the sub-positioning pin 2, an elastic member is provided between the lower end and the base 5, and it includes, from top to bottom:

[0028] The outer side of the positioning portion 21 is used for sleeve components, and its diameter is determined according to the inner hole of the required sleeve component;

[0029] The sliding portion 22 extends into the female guide sleeve 3 and slides in engagement;

[0030] The diameter of the stopper 23 is larger than that of the sliding portion 22 , so as to prevent the sub-locating pin shaft 2 from sliding upward out of the inner hole of the female guide sleeve 3 .

[0031] In this way, through the detachable and replaceable sub-positioning pin shaft 2, and the inner hole diameter of the female guide sleeve 3 and the sub-positioning pin shaft 2 that slides together is fixed, the sliding part diameter of each sub-positioning pin shaft 2 is also fixed, and the diameter of the positioning part 21 of each sub-positioning pin shaft 2 is determined according to the inner hole of the required sleeve component. Therefore, when the inner hole of the component changes, it is only necessary to replace the sub-positioning pin shaft of the positioning part whose diameter meets the conditions, and there is no need to replace the female guide sleeve 3. It is convenient to replace, saves time and effort, and can achieve rapid changeover. It has high switching efficiency and low economic cost. While greatly improving the switching time, it can also ensure the improvement of the positioning accuracy of the sub-positioning pin shaft and the female guide sleeve.

[0032] Specifically, a threaded hole is provided in the upper middle portion of the sub-positioning pin shaft 2, and the bushing positioning shaft 1 is threadedly connected to the threaded hole, and in the initial state, the upper end surface of the bushing positioning shaft 1 is higher than the upper end surface of the sub-positioning pin shaft 2, and the bushing 7 is sleeved on the outside of the portion of the bushing positioning shaft 1 extending out of the sub-positioning pin shaft 2, and the lower end of the bushing 7 is in contact with the upper end surface of the sub-positioning pin shaft 2. Of course, the bushing positioning shaft 1 and the upper middle portion of the sub-positioning pin shaft 2 can be detachably connected in other structures, such as snap-on connection, etc., depending on the specific situation. When the bushing positioning shaft 1 is worn and needs to be replaced, the bushing positioning shaft 1 can be removed from the sub-positioning pin shaft 2 and replaced with a new one. The operation is simple, the replacement is convenient, and it saves time and effort, thereby reducing the manufacturing cost of the tooling and reducing the assembly time of the tooling.

[0033] Furthermore, the female guide sleeve 3 includes an upper sleeve 31 and a lower sleeve 32 from top to bottom. The diameter of the upper sleeve 31 is smaller than the diameter of the lower sleeve 32. The positioning portion 21 is located at the upper end of the upper sleeve 31, and the sliding portion 22 extends into the inner wall of the inner hole of the upper sleeve 31 for sliding fit. The stop portion 23 is located at the lower end of the inner hole of the upper sleeve 31, and a fixing hole is provided at the lower end of the sub-positioning pin shaft 2. The upper end of the elastic member is fixed to the upper wall of the fixing hole, and the lower end is fixed to the connecting plate 4.

[0034] Specifically, the lower end of the female guide sleeve 3 is fixed to the connecting plate 4 by a connecting bolt 6. When the inner hole of the component changes and a new sub-locating pin 2 needs to be replaced, the connecting bolt 6 between the female guide sleeve 3 and the connecting plate 4 is first removed, and then a sub-locating pin 2 with a positioning portion that meets the required diameter is replaced. The sliding portion 22 of the new sub-locating pin 2 is slidably engaged with the inner hole of the upper sleeve 31 of the female guide sleeve 3, and finally the female guide sleeve 3 and the connecting plate 4 are fixed with the connecting bolt 6 to complete the quick changeover.

[0035] If the diameter of the sliding portion 22 of the sub-positioning pin shaft 2 that slides with the inner hole of the upper sleeve of the female guide sleeve 3 is 40 mm, it is fixed. Example 1: Figure 1 and Figure 3 As shown, the sub-positioning pin 2 with a positioning portion diameter of 40 mm is installed in the female guide sleeve 3. At this time, the diameter of the positioning portion 21 is equal to the diameter of the sliding portion 22; Example 2: As shown in FIG. Figure 2 and Figure 4 As shown, the sub-locating pin 2 with a locating portion 21 having a diameter of 34 mm is installed in the female guide sleeve 3. At this time, the diameter of the locating portion 21 is smaller than the diameter of the sliding portion 22. Of course, in other embodiments, the diameter of the locating portion 21 can also be other values, such as 38 mm, etc., which is specifically determined according to the inner hole of the required component.

[0036] In this way, when the inner hole of the component changes, it is only necessary to replace the sub-positioning pin shaft of the positioning part whose diameter meets the requirements, without replacing the female guide sleeve 3, which is convenient for replacement, saves time and effort, and can achieve rapid changeover.

[0037] Furthermore, the elastic member is configured as a spring 8 , a spring positioning block 9 is fixed on the connecting plate 4 , and the lower end of the spring 8 is sleeved and fixed on the spring positioning block 9 .

[0038] Preferably, due to the various complex structural limitations of the bushing 7, the lower end face of the bushing 7 is ensured to contact the upper end face of the sub-positioning pin shaft 2, and an avoidance hole 10 is also provided on the outer periphery of the threaded hole at the upper end of the positioning portion of the sub-positioning pin shaft 2, and the diameter of the avoidance hole 10 is larger than the diameter of the threaded hole.

[0039] It should be noted that a mounting hole may be opened in the middle of the upper end of the base 5 , and a convex shaft is provided at the lower end of the connecting plate 4 , and the convex shaft is interference fit in the mounting hole of the base 5 .

[0040] In summary, during press-fitting, first put the component on the outside of the positioning portion 21, with the lower end face of the component located on the upper end face of the female guide sleeve 3, and then put the bushing 7 on the outside of the bushing positioning shaft 1, with the lower end face of the bushing 7 located on the upper end face of the positioning portion 21. Start the pressure head of the press to contact and press down on the upper end face of the bushing 7. At this time, the sub-positioning pin shaft 2 moves downward under the pressure of the press, the spring 8 is compressed, the bushing 7 is pressed into the inner hole of the component, and the press rises. At this time, the spring 8 restores its elastic force to drive the sub-positioning pin shaft 2 to reset.

[0041] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0045] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A press-fit bushing tool, comprising a base, to which a female guide sleeve is detachably connected via a connecting plate, characterized in that: The inner sliding sleeve of the female guide sleeve is provided with a detachable and replaceable sub-positioning pin shaft for positioning the component. The upper middle part of the sub-positioning pin shaft is detachably connected to a bushing positioning shaft for positioning the bushing. An elastic member is provided between the lower end and the base, and it includes, from top to bottom: The outer side of the positioning part is used for sleeve components, and its diameter is determined according to the inner hole of the required sleeve component; A sliding portion extending into the female guide sleeve for sliding engagement; The diameter of the stopping portion is larger than the diameter of the sliding portion.

2. The press-fit bushing tool according to claim 1, characterized in that: The female guide sleeve includes an upper sleeve and a lower sleeve from top to bottom. The diameter of the upper sleeve is smaller than the diameter of the lower sleeve. The positioning portion is located at the upper end of the upper sleeve. The sliding portion extends into the inner wall of the inner hole of the upper sleeve for sliding fit. The stop portion is located at the lower end of the inner hole of the upper sleeve, and a fixing hole is provided at the lower end of the sub-positioning pin shaft. The upper end of the elastic member is fixed to the upper wall of the fixing hole, and the lower end is fixed to the connecting plate.

3. The press-fit bushing tool according to claim 2, characterized in that: A threaded hole is provided in the middle of the upper portion of the sub-positioning pin shaft, the bushing positioning shaft is threadedly connected to the threaded hole, and in an initial state, the upper end surface of the bushing positioning shaft is higher than the upper end surface of the sub-positioning pin shaft.

4. The press-fit bushing tool according to claim 3, characterized in that: An escape hole is further provided on the outer periphery of the threaded hole at the upper end of the positioning portion, and the diameter of the escape hole is larger than the diameter of the threaded hole.

5. The press-fit bushing tool according to claim 2, characterized in that: The elastic member is configured as a spring.

6. The press-fit bushing tool according to claim 5, characterized in that: A spring positioning block is fixed on the connecting plate, and the lower end of the spring is sleeved and fixed on the spring positioning block.

7. The press-fit bushing tool according to claim 1, characterized in that: The lower end of the female guide sleeve is fixed to the connecting plate via connecting bolts.

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