Pin shaft extraction assembly, pin shaft sleeve, and method of extracting a pin shaft

Abstract

The application discloses a pin shaft extraction assembly, a pin shaft sleeve assembly and a pin shaft extraction method. The pin shaft extraction assembly comprises a driving rod, a guide surface is arranged on the driving rod, the guide surface extends obliquely along the axial direction of the driving rod, and the distance between the guide surface and the axis of the driving rod gradually decreases from bottom to top along the axial direction of the driving rod; an extraction block is connected to the guide surface and can reciprocate along the extension direction of the guide surface; a first distance is arranged between the outermost side of the extraction block and the axis of the driving rod; and the first distance gradually decreases with the gradual upward movement of the extraction block. The application discloses a pin shaft extraction assembly, a pin shaft sleeve assembly and a pin shaft extraction method, and solves the problem that the existing pin shaft extraction effect is not ideal.

Description

Technical Field

[0001] This application relates to the field of vehicle parts technology, and more specifically, to a pin extraction component, a pin set, and a method for extracting a pin. Background Technology

[0002] Some parts on the vehicle are connected using pins. Pins are characterized by their simple and reliable structure, easy assembly and disassembly, and reusability. When it's necessary to remove an installed pin, a thin shaft is inserted into the pin's extraction hole, and a hammer is used to strike the thin shaft, pushing the pin out of the workpiece. This operation is relatively cumbersome, especially when repeated multiple times. It requires mastering the striking force and angle, and there's a risk of damaging the workpiece or even injuring someone. The ejected pins also need to be collected, wasting manpower.

[0003] Therefore, a pin extraction component, a pin set, and a pin extraction method are needed to solve the above problems. Summary of the Invention

[0004] In view of this, the purpose of this application is to propose a pin extraction component, a pin set, and a pin extraction method to solve the problem of unsatisfactory pin extraction effect in existing methods.

[0005] To achieve the above objectives, this application provides a pin extraction assembly, comprising: A drive rod, wherein a guide surface is provided on the drive rod, the guide surface extends obliquely along the axial direction of the drive rod, and the distance between the guide surface and the axis of the drive rod gradually decreases from bottom to top along the axial direction of the drive rod; An extraction block is connected to the guide surface and is capable of reciprocating along the extension direction of the guide surface; a first distance is provided between the outermost side of the extraction block and the axis of the drive rod; as the extraction block gradually moves upward, the first distance gradually decreases.

[0006] Optionally, a first connecting portion is provided on the guide surface, and a second connecting portion is provided on the extraction block to cooperate with the first connecting portion, wherein the first connecting portion and the second connecting portion are slidably connected.

[0007] Optionally, one of the first connecting part and the second connecting part is a slide rail, and the other is a slide groove used in conjunction with the slide rail.

[0008] Optionally, the drive rod is provided with a wedge-shaped groove, the guide surface is the inclined surface of the wedge-shaped groove, and the upper and lower ends of the wedge-shaped groove are respectively provided with limiting walls; the extraction block is a wedge-shaped block, the inner surface of the wedge-shaped block is in contact with the guide surface, the outer surface of the wedge-shaped block is arc-shaped, and the wedge-shaped block can reciprocate between the two limiting walls.

[0009] Optionally, the lower end face of the extraction block is provided with a first chamfer structure.

[0010] Optionally, the drive rod is provided with at least two guide surfaces, which are evenly distributed along the circumferential direction of the drive rod.

[0011] Optionally, the upper end of the drive rod is provided with a handle; and / or the lower end of the drive rod is provided with a second chamfer structure.

[0012] This application also provides a pin set, the pin set comprising: at least one pin and a pin extraction component as described above; the pin extraction component is used to extract the pin.

[0013] Optionally, the pin is provided with a pull-out hole that extends through the pin in the axial direction, and the inner diameter of the pull-out hole is located between the maximum and minimum values ​​of the first distance.

[0014] Optionally, the pin assembly further includes: a first workpiece having a first pin hole; when the first workpiece contacts the mating part, the pin passes through the first pin hole and enters the mating part to achieve the connection between the first workpiece and the mating part.

[0015] Optionally, the mating component is a second workpiece, which has a second pin hole. When the first workpiece and the second workpiece are in contact, the first pin hole and the second pin hole are interconnected, and the pin shaft passes through the first pin hole and the second pin hole to achieve the connection between the first workpiece and the second workpiece.

[0016] This application also provides a method for extracting a pin, which uses the pin extraction assembly described above to extract the pin; including: (1) Insert the lower end of the drive rod into the extraction hole of the pin from above; (2) The extraction block is driven into the extraction hole by the driving rod, wherein the extraction block moves upward relative to the driving rod along the extension direction of the guide surface at the same time as it enters the extraction hole; (3) When the extraction block enters the snap-fit ​​position relative to the extraction hole, the drive rod is moved upward so that the drive rod forms a squeezing force on the extraction block through the guide surface, so that the extraction block and the pin are snapped together; (4) Continue to move the drive rod upward so that the pin shaft moves upward through the extraction block so that the pin shaft disengages from the workpiece.

[0017] Optionally, step (2) further includes: contacting the opening of the extraction hole with the first chamfer structure on the lower end face of the extraction block, so that the extraction block smoothly enters the extraction hole under the guidance of the first chamfer structure.

[0018] Optionally, step (3) further includes: the snap-fit ​​position includes the position of the extraction block when the extraction block is fully inserted into the extraction hole.

[0019] Optionally, step (3) further includes: fixing the pin and moving the drive rod downward to release the pressure of the drive rod on the extraction block through the guide surface; continuing to move the drive rod downward so that the drive rod drives the extraction block to move downward and disengage from the pin.

[0020] Optionally, step (3) further includes: the drive rod drives the extraction block to move downward through the limiting wall at the upper end of the wedge groove.

[0021] As can be seen from the above description, the pin extraction assembly, pin set, and pin extraction method provided in this application have the following advantages compared with the prior art: Using the aforementioned pin extraction assembly, the extraction block reciprocates on the guide surface to adjust the first distance within a certain range. The diameter of the pin extraction hole is between its maximum and minimum values. When the drive rod moves the extraction block from top to bottom, the first distance changes from large to small, allowing the extraction block to enter the extraction hole to extract the pin. After the extraction block presses and engages the pin, when the drive rod moves the extraction block and the pin engaged on the extraction block from bottom to top, the first distance switches to a trend of increasing from small to large, enabling the extraction block to effectively extract the pin during the movement until the pin separates from the workpiece. When the pin extraction assembly extracts the pin from the workpiece, there is no need to use tools to strike it, avoiding accidental injury to operators. After the pin is removed, it will not fall off the extraction block, facilitating collection and avoiding manpower waste. Attached Figure Description

[0022] The above features and technical advantages of this application will become clearer and easier to understand from the following description of its embodiments in conjunction with the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the pin extraction device used in a specific embodiment of this application when the pin is not inserted.

[0024] Figure 2 for Figure 1 The diagram shows the pin extraction device when the pin is inserted.

[0025] Figure 3 for Figure 2 The cross-sectional view at point AA when the pin extraction device is inserted into the pin.

[0026] Figure 4 for Figure 2 The cross-sectional view at BB when the pin extraction device is inserted into the pin.

[0027] Figure 5 for Figure 1 The diagram shows the pin extraction device inserted halfway into the pin.

[0028] Figure 6 for Figure 5 The cross-sectional view at point CC when the pin extraction device is inserted into the pin.

[0029] Figure 7 for Figure 1 The diagram shown illustrates the pin extraction device when the pin is fully inserted.

[0030] Figure 8 for Figure 7 The diagram shows a cross-sectional view at point DD when the pin extraction device is fully inserted.

[0031] The attached figures are labeled as follows: 1-pin extraction device, 11-drive rod, 12-slide rail, 13-extraction block; 2-pin, 21-mouth edge, 22-extraction hole; 3-first workpiece; 4-second workpiece. Detailed Implementation

[0032] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0035] Figure 1 This is a schematic diagram of the pin 2 extraction device used in a specific embodiment of this application when the pin 2 is not inserted. Figure 2 for Figure 1 The diagram shows the pin 2 extraction device inserted into pin 2. Figure 3 for Figure 2 The cross-sectional view at point AA when the pin 2 extraction device is inserted into pin 2. Figure 4 for Figure 2 The cross-sectional view at BB when the pin 2 extraction device is inserted into pin 2. Figure 5 for Figure 1 The diagram shows the pin 2 extraction device inserted halfway into pin 2. Figure 6 for Figure 5 The cross-sectional view at point CC when the pin 2 extraction device is inserted into pin 2. Figure 7 for Figure 1 The diagram shown is a schematic of the pin 2 being fully inserted when the device is fully inserted. Figure 8 for Figure 7 The diagram shows a cross-sectional view at point DD when pin 2 is fully inserted after being removed from the assembly. Figures 1 to 8 As shown, the pin extraction assembly 1 includes a drive rod 11 and an extraction block 13.

[0036] A guide surface is provided on the drive rod 11. The guide surface extends obliquely along the axial direction of the drive rod 11, and the distance between the guide surface and the axis of the drive rod 11 gradually decreases from bottom to top along the axial direction of the drive rod 11.

[0037] See Figure 1 Typically, the drive rod 11 is a round rod, and its diameter should be slightly smaller than the inner diameter of the extraction hole 22 of the pin 2, allowing the drive rod 11 to pass through the extraction hole 22 without obstruction. The guide surface divides the drive rod 11 into three sections: upper, middle, and lower. The sum of the lengths of the upper and middle sections of the drive rod 11 should not exceed the length of the lower section. The length of the middle section is approximately two to three times the length of the upper section. The upper section of the drive rod 11 facilitates lifting, the middle section is used to extract the pin 2, and the lower section guides the rod into the extraction hole 22.

[0038] The guide surface is an inclined surface that extends smoothly. That is, there is a notch in the middle section of the drive rod 11, and the guide surface refers to the inclined surface between the upper and lower ends of the notch, extending from bottom to top and from the outside to the inside on the middle section of the drive rod 11. An acute angle is formed between the guide surface and the bottom surface of the upper section of the drive rod 11, and an obtuse angle is formed between the guide surface and the top surface of the lower section of the drive rod 11. The sum of the acute and obtuse angles is 180 degrees. Therefore, the distance between the guide surface and the axis of the drive rod 11 gradually increases from top to bottom and gradually decreases from bottom to top.

[0039] The number of guide surfaces can be one or more. When there are multiple guide surfaces, they are all located on the middle section of the drive rod 11 and are evenly or symmetrically distributed along the axis. If the inclination angle of the guide surface is large and the extension length is long, two guide surfaces can be provided; if the inclination angle of the guide surface is small and the extension length is short, four guide surfaces can be provided.

[0040] The extraction block 13 is connected to the guide surface and can reciprocate along the extension direction of the guide surface; a first distance is provided between the outermost side of the extraction block 13 and the axis of the drive rod 11; as the extraction block 13 gradually moves upward, the first distance gradually decreases.

[0041] See Figure 1 The extraction block 13 is generally arc-shaped. Its inner surface is in contact with the guide surface, providing low friction and facilitating its reciprocating movement along the guide surface. The outer surface of the extraction block 13 partially contacts the inner wall of the extraction hole 22 of the pin 2, providing high friction and facilitating a tight fit with the pin 2. The upper surface of the extraction block 13 is flat, while its lower surface is flat, inclined, or arc-shaped.

[0042] See also Figure 1 The length of the drive rod 11 is approximately 2 to 3 times the length of the pin 2, and the length of the pin 2 is approximately 3 to 4 times the length of the extraction block 13.

[0043] The distance between the outermost side of the extraction block 13 and the axis of the drive rod 11 is the first distance, which is variable within a certain range. As the extraction rod moves along the guide surface, the first distance changes accordingly. The first distance reaches its maximum value when the extraction block 13 moves to the lower limit position of the guide surface, and its minimum value when the extraction block 13 moves to the upper limit position of the guide surface. The diameter of the extraction hole 22 of the pin 2 lies between the maximum and minimum values.

[0044] When the drive rod 11 is in a vertical position, the extraction block 13 is located at the lower limit position of the guide surface under the action of gravity. When subjected to an external force from below, the extraction block 13 will gradually move upward, and the first distance will gradually decrease accordingly.

[0045] See Figure 3 Insert the lower end of the drive rod 11 into the extraction hole 22 of the pin 2 from above; at this time, the drive rod 11 is in a vertical state, and the extraction block 13 is located at the lower limit position of the guide surface under the action of gravity. As the drive rod 11 moves, the extraction block 13 and the pin 2 gradually switch from a state of no contact to a state of mutual contact, which provides assistance for the upward movement of the extraction block 13.

[0046] See Figure 6 The drive rod 11 drives a portion of the extraction block 13 into the extraction hole 22. As the extraction block 13 enters the extraction hole 22, it moves upward relative to the drive rod 11 along the extension direction of the guide surface. When the drive rod 11 has been inserted into the extraction hole 22 of the pin 2 for more than half its stroke, the pin 2 pushes and squeezes the extraction block 13 upward. At the same time, under the action of gravity, the lower middle end of the extraction block 13 has been inserted into the extraction hole 22.

[0047] See Figure 8 When the extraction block 13 enters the snap-fit ​​position relative to the extraction hole 22, the drive rod 11 moves upward so that the drive rod 11 forms a squeezing action on the extraction block 13 through the guide surface, so that the extraction block 13 and the pin 2 are snapped together; the drive rod 11 continues to move upward so that the pin 2 snapped together with it is driven upward through the extraction block 13 so that the pin 2 is disengaged from the workpiece.

[0048] Using the aforementioned pin extraction assembly 1, the extraction block 13 reciprocates on the guide surface to adjust the first distance within a certain range. The diameter of the extraction hole 22 of the pin 2 is between its maximum and minimum values. When the drive rod 11 moves the extraction block 13 from top to bottom, the first distance decreases, allowing the extraction block 13 to enter the extraction hole 22 to extract the pin 2. After the extraction block 13 presses and engages the pin 2, when the drive rod 11 moves the extraction block 13 and the pin 2 engaged on the extraction block 13 from bottom to top, the first distance changes from small to large, ensuring that the extraction block 13 can effectively extract the pin 2 during the movement until the pin 2 separates from the workpiece. When the pin extraction assembly 1 extracts the pin 2 from the workpiece, no tools are needed to strike it, avoiding accidental injury to operators. After the pin 2 is removed, it will not fall off the extraction block 13, facilitating collection and avoiding wasted manpower.

[0049] To reduce the difficulty of driving the extraction block 13 and achieve rapid response, optionally, a first connecting part is provided on the guide surface, and a second connecting part is provided on the extraction block 13 to cooperate with the first connecting part. The first connecting part and the second connecting part are slidably connected. Using a sliding connection, the extraction block 13 can slide freely along the guide surface. When the drive rod 11 is in a vertical state, the extraction block 13 can automatically move to the lower limit position of the guide surface under the action of gravity. During the movement, structural continuity and force transmission function can be maintained. One of the first connecting part and the second connecting part is a relatively fixed end, and the other is a relatively movable end.

[0050] To further simplify the structure and reduce operational difficulty, optionally, one of the first connecting part and the second connecting part is a slide rail 12, and the other is a groove used in conjunction with the slide rail 12. Typically, the slide rail 12 is set on the guide surface, for example, a slide rail 12 is laid along the centerline of the guide surface, and the groove is set on the side surface of the extraction block 13 facing the guide surface. The slide rail 12 is embedded in the groove, and under the action of external force, the extraction block 13 overcomes gravity and can move back and forth along the slide rail 12 through the groove.

[0051] See Figure 4 In one embodiment of this application, the slide rail 12 has a trapezoidal protrusion, and the width of the slide rail 12 gradually increases from bottom to top. The opposite ends of the guide rail have limiting portions, which can limit the maximum displacement of the extraction block 13. The slide groove is a corresponding trapezoidal groove, which is fastened to the slide rail 12. The slide groove can slide smoothly along the slide rail 12 and can prevent the extraction block 13 from derailing.

[0052] See also Figure 4 In one embodiment of this application, a guide surface is provided on each opposite side of the drive rod 11, and a slide rail 12 is provided on each guide surface. A pickup block 13 is connected to each slide rail 12. When the pickup block 13 is connected to the slide rail 12 via a groove, the inner surface of the pickup block 13 is in contact with the guide surface. Furthermore, the maximum distance between the outer surfaces of the two pickup blocks 13 is greater than the diameter of the drive rod 11, and the outermost surface of the pickup block 13 always protrudes beyond the outermost surface of the drive rod 11. That is, when the drive rod 11 drives the pickup block 13 into the pickup hole 22, the drive rod 11 does not contact the wall of the pickup hole 22, but rather contacts the wall of the pickup hole 22 through the outer wall of the pickup block 13.

[0053] Optionally, the drive rod 11 is provided with a wedge-shaped groove, the guide surface is the inclined surface of the wedge-shaped groove, and the upper and lower ends of the wedge-shaped groove are respectively provided with limiting walls; the extraction block 13 is a wedge-shaped block, the inner surface of the wedge-shaped block is in contact with the guide surface, the outer surface of the wedge-shaped block is arc-shaped, and the wedge-shaped block can reciprocate between the two limiting walls. The wedge-shaped groove is set on the middle section of the drive rod 11, and the limiting walls at the upper and lower ends of the wedge-shaped groove can serve as the limiting part of the slide rail 12. The inner inclined surface of the wedge-shaped block can be completely in contact with the inclined surface of the wedge-shaped groove, and the outer surface of the wedge-shaped block is used to fit and press against the inner ring of the pin 2. The above-mentioned pin 2 extraction device has a relatively compact structure and is easy to operate. It only requires the drive rod 11 to pass through the pin 2 and move downward, moving along the pin 2 until the extraction block 13 is pressed and engaged with the pin 2, and then the drive rod 11 is moved in the opposite direction to pull the extraction block 13 and drive the pin 2 to disengage from the workpiece.

[0054] In one embodiment of this application, wedge-shaped grooves are provided on the opposite sides of the middle section of the drive rod 11. The two wedge-shaped grooves are distributed in a mirror symmetrical manner along the axis of the drive rod 11, and the maximum depth of the wedge-shaped grooves is about one-third of the diameter of the drive rod 11.

[0055] To reduce the difficulty of inserting the extraction block 13 into the pin 2, optionally, the lower end face of the extraction block 13 is provided with a first chamfer structure. See also... Figure 3 , Figure 6 and Figure 8 The first chamfer structure includes, but is not limited to, a bevel or a rounded transition. By setting the first chamfer structure, a guiding bevel can be provided for the extraction block to enter the extraction hole 22 of the pin 2, which greatly reduces the assembly difficulty and ensures positioning accuracy.

[0056] To ensure uniform force distribution on the pin 2 and avoid affecting its structure, the drive rod 11 may optionally have at least two guide surfaces evenly distributed along its circumferential direction. Increasing the number of guide surfaces, i.e., correspondingly increasing the number of extraction blocks 13, increases the number of points of force application, facilitating extraction. Furthermore, by evenly distributing the points of force application, the pin 2 experiences uniform force throughout its circumferential range, enabling rapid and effective extraction.

[0057] See also Figure 4 The number of extraction blocks 13 is usually an even number, such as two or four. Taking two extraction blocks 13 as an example, they can be evenly distributed along the circumferential direction of the drive rod 11 and distributed in a mirror-symmetrical manner along the axis of the drive rod 11. When four extraction blocks 13 are provided on the drive rod 11, the maximum distance between the outer surfaces of the two opposite extraction blocks 13 is greater than the diameter of the drive rod 11.

[0058] To facilitate operation of the drive lever 11, a handle may be provided at the upper end of the drive lever 11; see [link / reference] Figure 1 A handle is provided on the upper end face of the drive rod 11.

[0059] In one embodiment of this application, the handle is an inverted U-shaped handle, and the part of the U-shaped handle that contacts the fingers or palm is a smooth curve, so that the fingers can be inserted into the U-shaped handle, or the drive rod 11 can be pushed or pulled by using a traction rope, traction structure, etc.

[0060] To reduce the difficulty of the drive rod 11 entering the pin 2, optionally, the lower end of the drive rod 11 is provided with a second chamfer structure. See also... Figure 3 , Figure 6 and Figure 8 The second chamfer structure includes, but is not limited to, a bevel or a rounded transition. By setting the second chamfer structure, a guiding bevel can be provided for the drive rod 11 to enter the extraction hole 22 of the pin 2, which greatly reduces the assembly difficulty and ensures positioning accuracy.

[0061] The following section further describes the usage process of the pin extraction component 1.

[0062] When the drive rod 11 is in a vertical position, the extraction blocks 13 on both sides are located at the lower limit position of the guide surface under the action of gravity, at which time the first distance is the maximum; the superposition value of the first distance of the two extraction blocks 13 is greater than the diameter of the drive rod 11. When the drive rod 11 moves downward through the extraction hole 22 of the pin 2 until the extraction block 13 contacts the pin 2, under the action of the external force from the pin 2, the extraction block 13 will gradually move upward, and the first distance will gradually decrease until the extraction block 13 can gradually enter the extraction hole 22.

[0063] See Figure 3 Insert the lower end of the drive rod 11 into the extraction hole 22 of the pin 2 from above; at this time, the drive rod 11 is in a vertical state, and the extraction block 13 is located at the lower limit position of the guide surface under the action of gravity. As the drive rod 11 moves, the extraction block 13 and the pin 2 gradually switch from a state of no contact to a state of mutual contact, which provides assistance for the upward movement of the extraction block 13.

[0064] See Figure 6 The drive rod 11 drives a portion of the extraction block 13 into the extraction hole 22. As the extraction block 13 enters the extraction hole 22, it moves upward relative to the drive rod 11 along the extension direction of the guide surface. When the drive rod 11 has been inserted into the extraction hole 22 of the pin 2 for more than half its stroke, the pin 2 pushes and squeezes the extraction block 13 upward. At the same time, under the action of gravity, the lower middle end of the extraction block 13 has been inserted into the extraction hole 22.

[0065] See Figure 8When the extraction block 13 enters the snap-fit ​​position relative to the extraction hole 22, the drive rod 11 moves upward so that the drive rod 11 forms a squeezing action on the extraction block 13 through the guide surface, so that the extraction block 13 and the pin 2 are snapped together; the drive rod 11 continues to move upward so that the pin 2 snapped together with it is driven upward through the extraction block 13 so that the pin 2 is disengaged from the workpiece.

[0066] This application also provides a pin assembly, which includes at least one pin 2 and a pin extraction component 1 as described above; the pin extraction component 1 is used to extract the pin 2. The pin extraction component 1 can be any of the pin extraction components described above, and will not be described in detail here.

[0067] Using the aforementioned pin assembly, the extraction block 13 reciprocates on the guide surface to adjust the first distance within a certain range. The diameter of the extraction hole 22 of the pin 2 is between its maximum and minimum values. When the drive rod 11 moves the extraction block 13 from top to bottom, the first distance decreases, allowing the extraction block 13 to enter the extraction hole 22 to extract the pin 2. After the extraction block 13 presses and engages the pin 2, when the drive rod 11 moves the extraction block 13 and the pin 2 engaged on the extraction block 13 from bottom to top, the first distance changes from small to large, ensuring that the extraction block 13 can effectively extract the pin 2 during the movement until the pin 2 separates from the workpiece. When the pin extraction assembly 1 extracts the pin 2 from the workpiece, it does not require tools to strike it, avoiding accidental injury to operators. After the pin 2 is removed, it will not fall off the extraction block 13, facilitating collection and avoiding wasted manpower.

[0068] Select a pin extraction assembly 1 of appropriate size according to the specifications of the pin 2. Optionally, the pin 2 is provided with an extraction hole 22 that extends through along the axial direction. The inner diameter of the extraction hole 22 is located between the maximum and minimum values ​​of the first distance. When the extraction block 13 moves along the guide surface 11, the first distance changes from large to small, and the extraction block 13 is in an inward state so that the extraction block 13 can enter the extraction hole 22. When the extraction block 13 starts to move in the opposite direction along the guide surface 11, the first distance changes from small to large, and the extraction block 13 can squeeze and engage the pin 2, and drive the pin 2 to disengage from the workpiece.

[0069] In one embodiment of this application, the upper end port edge 21 of the pin 2 is chamfered to facilitate the entry of the drive rod 11 and the extraction block. The wall of the extraction hole 22 of the pin 2 can be provided with a smooth surface or a threaded surface to increase friction.

[0070] The pin 2 is typically used to install a workpiece into a designated position or to combine two adjacent workpieces. Optionally, the pin set also includes a first workpiece 3, which has a first pin hole. When the first workpiece 3 contacts the mating part, the pin 2 passes through the first pin hole and enters the mating part to achieve the connection between the first workpiece 3 and the mating part. The pin 2 enables a stable connection of the workpieces and allows for a detachable connection; the disassembled pin 2 can be reused.

[0071] Optionally, the mating part is a second workpiece 4, which has a second pin hole. When the first workpiece 3 and the second workpiece 4 are in contact, the first pin hole and the second pin hole are connected to each other, and the pin 2 passes through the first pin hole and the second pin hole to realize the connection between the first workpiece 3 and the second workpiece 4.

[0072] In use, the lower end of the drive rod 11 is inserted into the extraction hole 22 of the pin 2 from above. At this time, the drive rod 11 is in a vertical state and passes through the first workpiece 3 and the second workpiece 4 in sequence. The extraction blocks 13 on both sides are located at the lower limit position of the guide surface under the action of gravity, at which time the first distance is the maximum. As the drive rod 11 moves, the extraction blocks 13 and the pin 2 gradually switch from a non-contact state to a contact state, providing assistance for the upward movement of the extraction blocks 13. When subjected to external force from the pin 2, the extraction blocks 13 will gradually move upward, and the first distance will gradually decrease until the extraction blocks 13 can gradually enter the extraction hole 22.

[0073] The drive rod 11 drives a portion of the extraction block 13 into the extraction hole 22. The drive rod 11 continues to move downward along the first workpiece 3 and the second workpiece 4. As the extraction block 13 enters the extraction hole 22, it moves upward relative to the drive rod 11 along the extension direction of the guide surface. When the drive rod 11 has been inserted into the extraction hole 22 of the pin 2 for more than half its stroke, the pin 2 pushes and squeezes the extraction block 13 upward. At the same time, under the action of gravity, the lower middle end of the extraction block 13 has been inserted into the extraction hole 22.

[0074] When the extraction block 13 enters the engaging position relative to the extraction hole 22, the drive rod 11 begins to move in the direction of movement. That is, the drive rod 11 drives the extraction block 13 and the pin 2 to move upward along the first workpiece 3 and the second workpiece 4, so that the drive rod 11 forms a squeezing action on the extraction block 13 through the guide surface, so that the extraction block 13 and the pin 2 are engaged. The drive rod 11 continues to move upward, so that the extraction block 13 drives the pin 2 engaged with it to move upward, so that the pin 2 disengages from the first workpiece 3 and the second workpiece 4.

[0075] This application also provides a method for extracting a pin 2, which uses the pin extraction component 1 as described above to extract the pin 2; including: (1) Insert the lower end of the drive rod 11 into the extraction hole 22 of the pin 2 from above; when the drive rod 11 is in a vertical state, the extraction block 13 is located at the lower limit position of the guide surface under the action of gravity. When subjected to an external force from below, the extraction block 13 will gradually move upward, and the first distance will gradually decrease.

[0076] (2) The extraction block 13 is driven into the extraction hole 22 by the drive rod 11. While the extraction block 13 enters the extraction hole 22, the extraction block 13 moves upward relative to the drive rod 11 along the extension direction of the guide surface. The lower end of the drive rod 11 is inserted into the extraction hole 22 of the pin 2 from above. At this time, the drive rod 11 is in a vertical state, and the extraction block 13 is located at the lower limit position of the guide surface under the action of gravity. As the drive rod 11 moves, the extraction block 13 and the pin 2 gradually switch from a non-contact state to a contact state, which provides assistance for the upward movement of the extraction block 13.

[0077] (3) When the extraction block 13 enters the snap-fit ​​position relative to the extraction hole 22, the drive rod 11 moves upward so that the drive rod 11 forms a squeezing action on the extraction block 13 through the guide surface, so that the extraction block 13 and the pin 2 are snapped together; the drive rod 11 drives a part of the extraction block 13 into the extraction hole 22, wherein, while the extraction block 13 enters the extraction hole 22, the extraction block 13 moves upward relative to the drive rod 11 along the extension direction of the guide surface; when the drive rod 11 is inserted into the extraction hole 22 of the pin 2 for more than half the stroke, the pin 2 pushes and squeezes the extraction block 13 to move upward, and at the same time, under the action of gravity, the middle and lower ends of the extraction block 13 have been inserted into the extraction hole 22.

[0078] (4) Continue to move the drive rod 11 upward so that the pin 2 is moved upward by the extraction block 13 so that the pin 2 is disengaged from the workpiece. When the extraction block 13 enters the snap-fit ​​position relative to the extraction hole 22, move the drive rod 11 upward so that the drive rod 11 forms a squeezing action on the extraction block 13 through the guide surface so that the extraction block 13 is snapped with the pin 2; continue to move the drive rod 11 upward so that the pin 2 snapped with it is moved upward by the extraction block 13 so that the pin 2 is disengaged from the workpiece.

[0079] Using the aforementioned pin extraction assembly 1, the extraction block 13 reciprocates on the guide surface to adjust the first distance within a certain range. The diameter of the extraction hole 22 of the pin 2 is between its maximum and minimum values. When the drive rod 11 moves the extraction block 13 from top to bottom, the first distance decreases, allowing the extraction block 13 to enter the extraction hole 22 to extract the pin 2. After the extraction block 13 presses and engages the pin 2, when the drive rod 11 moves the extraction block 13 and the pin 2 engaged on the extraction block 13 from bottom to top, the first distance changes from small to large, ensuring that the extraction block 13 can effectively extract the pin 2 during the movement until the pin 2 separates from the workpiece. When the pin extraction assembly 1 extracts the pin 2 from the workpiece, no tools are needed to strike it, avoiding accidental injury to operators. After the pin 2 is removed, it will not fall off the extraction block 13, facilitating collection and avoiding wasted manpower.

[0080] Optionally, step (2) further includes: contacting the opening of the extraction hole 22 with the first chamfer structure on the lower end face of the extraction block 13, so that the extraction block 13 smoothly enters the extraction hole 22 guided by the first chamfer structure. The first chamfer structure includes, but is not limited to, a bevel or a rounded transition. By setting the first chamfer structure, a guiding bevel can be provided for the extraction block to enter the extraction hole 22 of the pin 2, which greatly reduces the assembly difficulty and ensures positioning accuracy.

[0081] In addition, the lower end of the drive rod 11 is provided with a second chamfer structure. The second chamfer structure includes, but is not limited to, a bevel or a rounded transition. By providing the second chamfer structure, a guiding bevel can be provided for the drive rod 11 to enter the extraction hole 22 of the pin 2, which greatly reduces the assembly difficulty and ensures positioning accuracy.

[0082] Optionally, step (3) further includes: the snap-fit ​​position includes the position of the pull-out block 13 when it is fully inserted into the pull-out hole 22. When the pull-out block 13 is fully inserted into the pull-out hole 22, the contact area between the pull-out block 13 and the hole wall of the pull-out hole 22 can be increased, and the friction between the pull-out block 13 and the hole wall of the pull-out hole 22 can be increased. When the drive rod 11 is pulled upward, force can be applied to the pin 2 more effectively, thereby better pulling the pin 2 out.

[0083] Optionally, step (3) further includes: fixing the pin 2 and moving the drive rod 11 downward to release the pressure of the drive rod 11 on the extraction block 13 through the guide surface; continuing to move the drive rod 11 downward so that the drive rod 11 drives the extraction block 13 to move downward and disengage from the pin 2. After the pin 2 is extracted, the pin 2 can be removed from the pin extraction assembly 1 in this way. This disassembly method not only facilitates the removal of the pin 2 from the pin extraction assembly 1, but also effectively reduces the damage to the pin 2 and the pin extraction assembly 1, facilitates the reuse of the pin 2, and facilitates the next extraction of the pin 2 by the pin extraction assembly 1.

[0084] Optionally, step (3) further includes: the drive rod 11 drives the extraction block 13 to move downward through the limiting wall at the upper end of the wedge groove. The limiting wall at the upper end of the wedge groove can serve as the limiting part of the slide rail 12. When the drive rod 11 moves downward through the pin 2, the limiting wall at the upper end of the wedge groove moves along the pin 2 to engage with the extraction block 13. As the drive rod 11 continues to move downward, the extraction block 13 is driven to move downward through the limiting wall at the upper end, thereby causing the extraction block 13 to disengage from the pin 2.

[0085] As can be seen from the above description and practice, the pin extraction assembly 1, pin set, and pin 2 extraction method provided in this application have the following advantages compared with the prior art: Using the aforementioned pin extraction assembly 1, the extraction block 13 reciprocates on the guide surface to adjust the first distance within a certain range. The diameter of the extraction hole 22 of the pin 2 is between its maximum and minimum values. When the drive rod 11 moves the extraction block 13 from top to bottom, the first distance changes from large to small, allowing the extraction block 13 to enter the extraction hole 22 to extract the pin 2. After the extraction block 13 presses and engages the pin 2, when the drive rod 11 moves the extraction block 13 and the pin 2 engaged on the extraction block 13 from bottom to top, the first distance switches to a trend of increasing from small to large, enabling the extraction block 13 to effectively extract the pin 2 during the movement until the pin 2 separates from the workpiece. When the pin extraction assembly 1 extracts the pin 2 from the workpiece, there is no need to use tools to strike it, avoiding accidental injury to operators. After the pin 2 is removed, it will not fall off the extraction block 13, making it easy to collect and avoiding waste of manpower.

[0086] Those skilled in the art should understand that the above description is merely a specific embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the scope of this application should be included within the protection scope of this application.

Claims

1. A pin-shaft extraction assembly, characterized in that, include: A drive rod, wherein a guide surface is provided on the drive rod, the guide surface extends obliquely along the axial direction of the drive rod, and the distance between the guide surface and the axis of the drive rod gradually decreases from bottom to top along the axial direction of the drive rod; An extraction block is connected to the guide surface and is capable of reciprocating along the extension direction of the guide surface; a first distance is provided between the outermost side of the extraction block and the axis of the drive rod; as the extraction block gradually moves upward, the first distance gradually decreases.

2. The pin extraction assembly according to claim 1, characterized in that: A first connecting part is provided on the guide surface, and a second connecting part is provided on the extraction block to cooperate with the first connecting part. The first connecting part and the second connecting part are slidably connected.

3. The pin extraction assembly according to claim 2, characterized in that: One of the first connecting part and the second connecting part is a slide rail, and the other is a slide groove used in conjunction with the slide rail.

4. The pin extraction assembly according to claim 3, characterized in that: The drive rod is provided with a wedge-shaped groove, the guide surface is the inclined surface of the wedge-shaped groove, and the upper and lower ends of the wedge-shaped groove are respectively provided with limit walls; the extraction block is a wedge-shaped block, the inner surface of the wedge-shaped block is in contact with the guide surface, the outer surface of the wedge-shaped block is arc-shaped, and the wedge-shaped block can reciprocate between the two limit walls.

5. The pin extraction assembly according to claim 4, characterized in that: The lower end face of the extraction block is provided with a first chamfer structure.

6. The pin extraction assembly according to any one of claims 1 to 5, characterized in that: The drive rod is provided with at least two guide surfaces, which are evenly distributed along the circumferential direction of the drive rod.

7. The pin extraction assembly according to any one of claims 1 to 5, characterized in that: The upper end of the drive rod is provided with a handle; and / or the lower end of the drive rod is provided with a second chamfer structure.

8. A pin set, characterized in that, The pin assembly includes: at least one pin and a pin extraction component as described in any one of claims 1 to 7; the pin extraction component is used to extract the pin.

9. The pin assembly according to claim 8, characterized in that, The pin is provided with a pull-out hole that extends through the shaft along the axial direction, and the inner diameter of the pull-out hole is located between the maximum and minimum values ​​of the first distance.

10. The pin assembly according to claim 9, characterized in that, Also includes: The first workpiece has a first pin hole. When the first workpiece contacts the mating part, the pin passes through the first pin hole and enters the mating part to achieve the connection between the first workpiece and the mating part.

11. The pin assembly according to claim 10, characterized in that, The mating component is a second workpiece, which has a second pin hole. When the first workpiece and the second workpiece are in contact, the first pin hole and the second pin hole are connected to each other. The pin shaft passes through the first pin hole and the second pin hole to realize the connection between the first workpiece and the second workpiece.

12. A method for extracting a pin, characterized in that, Extracting a pin using the pin extraction assembly as described in any one of claims 1 to 7; comprising: (1) Insert the lower end of the drive rod into the extraction hole of the pin from above; (2) The extraction block is driven into the extraction hole by the driving rod, wherein the extraction block moves upward relative to the driving rod along the extension direction of the guide surface at the same time as it enters the extraction hole; (3) When the extraction block enters the snap-fit ​​position relative to the extraction hole, the drive rod is moved upward so that the drive rod forms a squeezing force on the extraction block through the guide surface, so that the extraction block and the pin are snapped together; (4) Continue to move the drive rod upward so that the pin shaft moves upward through the extraction block so that the pin shaft disengages from the workpiece.

13. The method for extracting the pin according to claim 12, characterized in that, Step (2) further includes: the first chamfer structure on the lower end face of the extraction block contacts the opening of the extraction hole, so that the extraction block smoothly enters the extraction hole under the guidance of the first chamfer structure.

14. The method for extracting the pin according to claim 13, characterized in that, Step (3) further includes: the snap-fit ​​position includes the position of the extraction block when the extraction block is fully inserted into the extraction hole.

15. The method for extracting the pin according to any one of claims 12 to 14, characterized in that, Step (3) further includes: fixing the pin and moving the drive rod downward to release the pressure of the drive rod on the extraction block through the guide surface; continuing to move the drive rod downward so that the drive rod drives the extraction block to move downward and disengage from the pin.

16. The method for extracting the pin according to claim 15, characterized in that, Step (3) further includes: the drive rod drives the extraction block to move downward through the limiting wall at the upper end of the wedge groove.

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