A hand-held bushing electric press-fitting device and its press-fitting method

Abstract

The present invention discloses a handheld electric bushing pressing device and its pressing method, which relates to the technical field of bushing assembly. The handheld electric bushing pressing device includes: a plug, which is arranged above the mounting hole of the workpiece; an elastic clamp, which can be deformed under force. The top of the elastic clamp can be in contact with the bottom of the plug, and the contact surface between the two is an inclined surface. When the elastic clamp presses the plug upward, the plug presses the elastic clamp downward, causing the elastic clamp to contract radially; a guide sleeve, which is arranged at the bottom of the elastic clamp and is used to drive the elastic clamp to move; a driving device, which is used to drive the guide sleeve to lift and lower in the mounting hole; a boss for clamping the end of the bushing is also arranged at the top of the elastic clamp. The outer diameter of the elastic clamp and the outer diameter of the guide sleeve are the same and are both less than or equal to the inner diameter of the bushing, and the outer diameter of the bushing is less than or equal to the inner diameter of the mounting hole. This device can effectively improve the pressing effect between the workpiece and the bushing, and the device has a simple structure and is convenient to use, and can be popularized and used.

Description

Technical Field

[0001] The present invention relates to the technical field of bushing assembly, and more specifically, to a handheld electric bushing pressing device. In addition, it also relates to a pressing method applied to the above-mentioned handheld electric bushing pressing device. Background Art

[0002] In the prior art, when performing a pressing operation on a workpiece and a bushing, the following several methods are usually adopted, including:

[0003] 1. Under the guiding action of the guiding shaft 01, the bushing 03 is knocked into the assembly hole of the workpiece 04 using a hammer 02. The structure is as Figure 1 shown. It has problems such as a large manual operation intensity, the hammer 02 being prone to hurting the operator during the knocking process, and a relatively large noise during the hammering process.

[0004] 2. The method of using an oil cylinder 05 + a stopper 06 to press the bushing 03 into the workpiece 04. The structure is as Figure 2 shown, that is, a connecting rod 07 is penetrated through the installation hole of the workpiece 04. A stopper 06 is provided at the top of the connecting rod 07. The bushing 03 is sleeved at the bottom of the connecting rod 07. The driving end of the oil cylinder 05 is provided with a pushing block 08 for pushing the bushing 03 to move. Under the combined clamping action of the pushing block 08 and the stopper 06, it can ensure that the bushing 03 is installed in place. However, it has problems such as the need for hydraulic oil to provide power, the equipment being bulky and having a high input cost. Moreover, each time it works, it is necessary to manually install the stopper 06, which has limitations on the height of the workpiece 04, that is, there are limitations on the position of manually installing the stopper 06, whether the hand can reach the position of the bushing 03, etc.

[0005] 3. Using a stamping device for bushing 03 assembly. When assembling, it is necessary to carry the workpiece 04 to the stamping device. The input of the stamping device is large, and there are requirements for the site and power supply, etc. For the heavy workpiece 04, the stamping device cannot perform the operation of pressing the bushing 03 in place.

[0006] In summary, how to improve the pressing effect between the workpiece and the bushing is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0007] In view of this, an object of the present invention is to provide a handheld electric bushing pressing device, which can effectively improve the pressing effect between the workpiece and the bushing. Moreover, the structure of this device is simple, easy to use, does not have restrictions such as site and power supply requirements, and can be popularized and used.

[0008] Another object of the present invention is to provide a pressing method applied to the above-mentioned handheld electric bushing pressing device.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A handheld electric bushing pressing device, comprising:

[0011] A plug, which is arranged above the mounting hole of the workpiece;

[0012] An elastic clip, which can be deformed under force. The top of the elastic clip can be in contact with the bottom of the plug, and the contact surfaces of the two are inclined planes. When the elastic clip squeezes the plug upward, the plug squeezes the elastic clip downward, causing the elastic clip to contract radially;

[0013] A guide sleeve, which is arranged at the bottom of the elastic clip and is used to drive the elastic clip to move;

[0014] A driving device, which is used to drive the guide sleeve to lift and lower in the mounting hole;

[0015] The top of the elastic clip is further provided with a convex platform for clamping the end of the bushing. The outer diameter of the elastic clip and the outer diameter of the guide sleeve are the same and are both less than or equal to the inner diameter of the bushing. The outer diameter of the bushing is less than or equal to the inner diameter of the mounting hole.

[0016] Preferably, the driving device includes a lead screw for inserting into the mounting hole, a driving motor for driving the lead screw to rotate, and a nut sleeved on the outer peripheral part of the lead screw. The guide sleeve is arranged on the nut.

[0017] Preferably, the plug includes a first connecting part for connecting with the lead screw and a first pressing part for pressing the elastic clip. The first connecting part and the first pressing part are of an integral structure, and the bottom surface of the first pressing part is a first inclined plane;

[0018] The elastic clip includes a second pressing part for pressing the plug and a second connecting part for connecting with the guide sleeve. The second connecting part and the second pressing part are of an integral structure. A cavity is provided through the center of the elastic clip, and the cavity is used to pass through the first connecting part and accommodate the contracted second pressing part;

[0019] The outer diameter of the first pressing part is the same as the outer diameter of the second connecting part. The top surface of the second pressing part is a second inclined plane and the bottom surface is a horizontal plane. The second inclined plane is arranged in cooperation with the first inclined plane, and the horizontal plane is connected with the outer peripheral part of the second connecting part to form the convex platform.

[0020] Preferably, at least two slots are provided at equal intervals in the circumferential direction of the elastic clip.

[0021] Preferably, the inclination angles of the second inclined plane and the first inclined plane are the same, and the included angle between the second inclined plane and the horizontal line is 30° to 45°.

[0022] Preferably, the drive motor includes an electric cylinder motor and a battery for charging the electric cylinder motor.

[0023] Preferably, the top of the guide sleeve and the bottom of the elastic clip are detachably connected.

[0024] A press-fitting method, applied to the handheld bushing electric press-in device described in any one of the above, includes:

[0025] Tighten the elastic clip, and sequentially sleeved at least one first bushing on the outer peripheral portion of the elastic clip, and the first bushing falls into the outer peripheral portion of the guide sleeve;

[0026] Insert the guide sleeve and the elastic clip into the mounting hole of the workpiece, and the elastic clip exposes the end of the workpiece;

[0027] Sleeve a second bushing on the tightened elastic clip, and loosen the elastic clip to make the end face of the second bushing engage with the boss;

[0028] The driving device drives the guide sleeve to descend, and the elastic clip drives the second bushing to move downward until the first bushing and the second bushing abut against each other;

[0029] The driving device drives the guide sleeve to rise until the elastic clip abuts against the plug and the elastic clip contracts radially to withdraw the guide sleeve and the elastic clip from the workpiece equipped with the bushing.

[0030] When using the handheld bushing electric press-in device provided by the present invention, first, the elastic clip can be tightened, and at least one first bushing can be sequentially sleeved on the outer peripheral portion of the elastic clip, and the first bushing can sequentially fall into the outer peripheral portion of the guide sleeve. Then, the guide sleeve and the elastic clip can be inserted into the mounting hole of the workpiece, and the elastic clip can expose the end of the workpiece. Then, a second bushing is sleeved on the tightened elastic clip, and the elastic clip is loosened to make the end face of the second bushing engage with the boss. After that, the driving device can drive the guide sleeve to descend, and the elastic clip drives the second bushing to move downward until the first bushing and the second bushing abut against each other to ensure that each bushing is assembled in place. Finally, the driving device drives the guide sleeve to rise until the elastic clip abuts against the plug and the elastic clip contracts radially to withdraw the guide sleeve and the elastic clip from the mounting hole.

[0031] In summary, the handheld bushing electric press-in device provided by the present invention can effectively improve the press-fitting effect between the workpiece and the bushing, and moreover, the structure of this device is simple, easy to use, does not have requirements such as site and power supply restrictions, and can be popularized and used.

[0032] In addition, the present invention also provides a press-fitting method applied to the above-mentioned handheld bushing electric press-in device. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0034] Figure 1 It is a schematic structural diagram of using a hammer to press a bushing into a workpiece in the prior art;

[0035] Figure 2 It is a schematic structural diagram of using an oil cylinder + a stopper to press a bushing into a workpiece in the prior art;

[0036] Figure 3 It is a schematic structural diagram of the handheld electric bushing pressing device provided by the present invention;

[0037] Figure 4 It is a sectional view of the elastic clamp;

[0038] Figure 5 It is a top view of the elastic clamp;

[0039] Figure 6 It is a schematic structural diagram of the plug;

[0040] Figure 7 It is a schematic flow diagram of the pressing method provided by the present invention.

[0041] Figure 1 and Figure 2 In:

[0042] 01 is the guide shaft, 02 is the hammer, 03 is the bushing, 04 is the workpiece, 05 is the oil cylinder, 06 is the stopper, 07 is the connecting rod, 08 is the pushing block;

[0043] Figures 3 to 7 In:

[0044] 1 is the plug, 11 is the first connecting part, 12 is the first extrusion part, 13 is the first inclined surface, 2 is the elastic clamp, 21 is the convex platform, 22 is the second extrusion part, 23 is the second connecting part, 24 is the cavity, 25 is the slotted opening, 26 is the second inclined surface, 3 is the guide sleeve, 4 is the driving device, 41 is the lead screw, 42 is the driving motor, 421 is the electric cylinder motor, 422 is the battery, 43 is the nut, 5 is the first bushing, 6 is the second bushing, 7 is the workpiece. Detailed implementation manners

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] The core of the present invention is to provide a handheld electric bushing pressing device, which can effectively improve the pressing effect between the workpiece and the bushing. Moreover, the structure of this device is simple and easy to use, without requirements such as site and power supply restrictions, and can be popularized and used.

[0047] Another core of the present invention is to provide a pressing method applied to the above-mentioned handheld electric bushing pressing device.

[0048] Please refer to Figures 3 to 7 , Figure 3 , which is a schematic structural diagram of the handheld electric bushing pressing device provided by the present invention; Figure 4 is a sectional view of the elastic clamp; Figure 5 is a top view of the elastic clamp; Figure 6 is a schematic structural diagram of the plug; Figure 7 is a schematic flow diagram of the pressing method provided by the present invention.

[0049] This specific embodiment provides a handheld electric bushing pressing device, including:

[0050] A plug 1, which is arranged above the installation hole of the workpiece 7;

[0051] An elastic clamp 2, which can be deformed by force. The top of the elastic clamp 2 can be in contact with the bottom of the plug 1, and the contact surface between the two is an inclined surface. When the elastic clamp 2 squeezes the plug 1 upward, the plug 1 squeezes the elastic clamp 2 downward, causing the elastic clamp 2 to contract radially;

[0052] A guide sleeve 3, which is arranged at the bottom of the elastic clamp 2 and is used to drive the elastic clamp 2 to move;

[0053] A driving device 4, which is used to drive the guide sleeve 3 to lift and lower in the installation hole;

[0054] The top of the elastic clamp 2 is also provided with a convex platform 21 for clamping the end of the bushing. The outer diameter of the elastic clamp 2 and the outer diameter of the guide sleeve 3 are the same and are both less than or equal to the inner diameter of the bushing, and the outer diameter of the bushing is less than or equal to the inner diameter of the installation hole.

[0055] It should be noted that since the outer diameter of the elastic clip 2 is the same as that of the guide sleeve 3 and is less than or equal to the inner diameter of the bushing, the bushing can smoothly pass through the contracted elastic clip 2. Since the outer diameter of the bushing is less than or equal to the inner diameter of the mounting hole, the bushing can move up and down in the mounting hole of the workpiece 7 along with components such as the guide sleeve 3 until the state of the bushing is in place. Moreover, when the elastic clip 2 squeezes the plug 1 upward, the plug 1 can act downward on the elastic clip 2 in the reverse direction, causing the elastic clip 2 to contract radially, so as to facilitate sleeving the bushing to be installed onto the outer periphery of the elastic clip 2, and the bushing can fall onto the outer periphery of the guide sleeve 3. After each bushing is assembled in place in the mounting hole, the elastic clip 2 can be controlled to move upward to a position where it abuts against the plug 1, causing the elastic clip 2 to contract and deform. During this upward movement, both the elastic clip 2 and the guide sleeve 3 are separated from the assembled bushing, so as to facilitate the removal of the elastic clip 2 and the guide sleeve 3.

[0056] It should also be noted that if multiple bushings need to be assembled, some bushings can be directly sleeved onto the outer periphery of the guide sleeve 3 through the contracted elastic clip 2, so that the guide sleeve 3 drives these bushings into the mounting hole. And, another bushing can be sleeved on the elastic clip 2. After the elastic clip 2 is loosened, the end face of the bushing can be abutted against by the boss 21, so as to facilitate the elastic clip 2 to drive the bushing to move downward until each bushing is assembled in place in the mounting hole. Additionally, the weight of this device can be set within the range of 10 Kg, so as to facilitate the operation by an operator holding it.

[0057] During the actual application process, the shape, structure, dimensions, material, position, etc. of the plug 1, elastic clip 2, guide sleeve 3, and driving device 4 can be determined according to the actual situation and actual requirements.

[0058] When using the handheld bushing electric press-fitting device provided by the present invention, first, the elastic clip 2 can be tightened, and at least one first bushing 5 can be successively sleeved onto the outer periphery of the elastic clip 2, and the first bushing 5 can successively fall onto the outer periphery of the guide sleeve 3. Then, the guide sleeve 3 and the elastic clip 2 can be inserted into the mounting hole of the workpiece 7, and the elastic clip 2 can be exposed at the end of the workpiece 7. Then, a second bushing 6 is sleeved on the tightened elastic clip 2, and the elastic clip 2 is loosened so that the end face of the second bushing 6 is clamped with the boss 21. After that, the driving device 4 can drive the guide sleeve 3 to descend, and the elastic clip 2 drives the second bushing 6 to move downward until the first bushing 5 and the second bushing 6 abut against each other, so as to ensure that each bushing is assembled in place. Finally, the driving device 4 drives the guide sleeve 3 to rise until the elastic clip 2 abuts against the plug 1 and the elastic clip 2 contracts radially, so as to withdraw the guide sleeve 3 and the elastic clip 2 from the mounting hole.

[0059] In summary, the handheld bushing electric press-fitting device provided by the present invention can effectively improve the press-fitting effect between the workpiece 7 and the bushing. Moreover, the structure of this device is simple, easy to use, has no restrictions on the site and power supply, etc., and can be popularized and used.

[0060] Based on the above embodiments, preferably, the driving device 4 includes a lead screw 41 for inserting into the mounting hole, a driving motor 42 for driving the lead screw 41 to rotate, and a nut 43 sleeved on the outer peripheral portion of the lead screw 41. The guide sleeve 3 is arranged on the nut 43. By controlling the operation of the driving motor 42, the lead screw 41 can be rotated circumferentially. During the rotation of the lead screw 41, the lifting movement of the nut 43 can be realized, and further the lifting movement control of the guide sleeve 3 and the elastic clip 2 can be realized.

[0061] Preferably, the plug 1 includes a first connecting portion 11 for connecting with the lead screw 41 and a first pressing portion 12 for pressing the elastic clip 2. The first connecting portion 11 and the first pressing portion 12 are of an integral structure, and the bottom surface of the first pressing portion 12 is a first inclined surface 13;

[0062] The elastic clip 2 includes a second pressing portion 22 for pressing the plug 1 and a second connecting portion 23 for connecting with the guide sleeve 3. The second connecting portion 23 and the second pressing portion 22 are of an integral structure. A cavity 24 is provided through the center of the elastic clip 2 for passing through the first connecting portion 11 and accommodating the contracted second pressing portion 22;

[0063] The outer diameter of the first pressing portion 12 is the same as the outer diameter of the second connecting portion 23. The top surface of the second pressing portion 22 is a second inclined surface 26 and the bottom surface is a horizontal surface. The second inclined surface 26 is arranged in cooperation with the first inclined surface 13, and the horizontal surface is connected with the outer peripheral portion of the second connecting portion 23 to form the boss 21.

[0064] Therefore, when the driving motor 42 operates, the plug 1 can rotate circumferentially synchronously with the lead screw 41, and the plug 1 will not perform lifting movement. Only the nut 43, the guide sleeve 3 and the elastic clip 2 can move up and down along the lead screw 41. After all the bushings to be installed are assembled in place, the driving motor 42 can be controlled to operate so that the nut 43, the guide sleeve 3 and the elastic clip 2 rise along the lead screw 41 until the elastic clip 2 contacts the plug 1 and the generated pressing force causes the elastic clip 2 to shrink, so that the device can be freely taken out from the mounting hole and the bushing hole.

[0065] Preferably, at least two slots 25 are provided at equal intervals in the circumferential direction of the elastic clip 2. The size of the slots 25 can be determined by the minimum size of the contraction of the elastic clip 2, and this minimum size needs to ensure that the bushing can freely pass through the contracted elastic clip 2 to ensure that the device can be smoothly taken out after the bushing pressing operation is completed. And by setting the elastic clip 2 as a slotted 25 structure, the elastic scaling of the elastic clip 2 can be realized, so as to facilitate the separation from the bushing or fully fix the bushing.

[0066] On the basis of the above embodiments, preferably, the inclination angles of the second inclined surface 26 and the first inclined surface 13 are the same, and the included angle between the second inclined surface 26 and the horizontal line is 30° to 45°. When the elastic clip 2 squeezes the plug 1 upward, the plug 1 can exert a downward force on the elastic clip 2, so that the elastic clip 2 is subjected to a force that contracts in the inner diameter direction, causing the elastic clip 2 to contract and deform, so that the bushing can freely pass through the contracted elastic clip 2. Setting the inclination angle of the inclined surface to 30° to 45° can more labor-savingly realize the radial contraction operation of the elastic clip 2 and is also convenient for manufacturing the inclined surfaces of the elastic clip 2 and the plug 1.

[0067] Preferably, the driving motor 42 includes an electric cylinder motor 421 and a battery 422 for charging the electric cylinder motor 421.

[0068] It should be noted that since the force-bearing contact surface between the elastic clip 2 and the bushing is perpendicular to the pressing direction during the pressing process of the bushing, it will not cause the elastic clip 2 to shrink. Therefore, a constant pressing force parallel to the pressing direction can be generated to push the bushing downward to avoid damage and deformation of the bushing during the press-fitting process. Moreover, a constant bushing pressing force can be estimated, and the electric cylinder motor 421 with a suitable model size can be selected according to the bushing pressing force and the size of the workpiece 7. Furthermore, the electric cylinder motor 421 is powered by a rechargeable battery 422, which can avoid inconvenience caused by the absence of a power cord during the operation process.

[0069] Preferably, the top of the guide sleeve 3 and the bottom of the elastic clip 2 are detachably connected. If one of the guide sleeve 3 or the elastic clip 2 is damaged during use, the damaged part can be replaced through disassembly operation, and then the new part and other undamaged parts can continue to be used in cooperation to improve the service life of the device and reduce the maintenance cost of the device.

[0070] In addition to the above-mentioned handheld electric bushing pressing device, the present invention also provides a pressing method including the handheld electric bushing pressing device disclosed in the above embodiments. The pressing method includes:

[0071] S1, tighten the elastic clip 2, and sequentially sleeved at least one first bushing 5 on the outer periphery of the elastic clip 2, and the first bushing 5 falls on the outer periphery of the guide sleeve 3;

[0072] S2, insert the guide sleeve 3 and the elastic clip 2 into the mounting hole of the workpiece 7, and the elastic clip 2 exposes the end of the workpiece 7;

[0073] S3, sleeved a second bushing 6 on the tightened elastic clip 2, and loosen the elastic clip 2 to make the end face of the second bushing 6 engage with the boss 21;

[0074] S4, the driving device 4 drives the guide sleeve 3 to descend, and the elastic clip 2 drives the second bushing 6 to move downward until the first bushing 5 and the second bushing 6 are in contact with each other;

[0075] In S5, the driving device 4 drives the guide sleeve 3 to rise until the elastic clamp 2 abuts against the plug 1 and the elastic clamp 2 contracts radially, so as to withdraw the guide sleeve 3 and the elastic clamp 2 from the workpiece 7 equipped with the bushing.

[0076] It should be supplemented and explained that if only one bushing needs to be inserted into the mounting hole of the workpiece 7, steps S1 and S2 can be omitted. The bushing can be directly sleeved on the outer periphery of the tightened elastic clamp 2, and then the elastic clamp 2 is loosened so that the end face of the bushing is clamped with the boss 21. After that, the driving device 4 can be used to drive the guide sleeve 3 to descend, so that the elastic clamp 2 drives the second bushing 6 to move downward until the bushing and the workpiece 7 are assembled in place. Finally, the driving device 4 can be used to drive the guide sleeve 3 to rise until the elastic clamp 2 abuts against the plug 1 and the elastic clamp 2 contracts radially, so as to facilitate the withdrawal of components such as the guide sleeve 3 and the elastic clamp 2 from the workpiece 7 equipped with the bushing.

[0077] It should be noted that for the first connecting portion 11 and the second connecting portion 23, the first pressing portion 12 and the second pressing portion 22, the first inclined surface 13 and the second inclined surface 26, the first bushing 5 and the second bushing 6 mentioned in this application document, where the first and the second are only for distinguishing different positions and there is no order of precedence.

[0078] In addition, it should also be noted that the orientation or positional relationship indicated by "up and down", "inside and outside", etc. in this application is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplifying the description and understanding, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention.

[0079] Each embodiment in this specification is described in a progressive manner. The key points of each embodiment are the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. Any combination of all the embodiments provided by the present invention is within the protection scope of this invention and will not be elaborated here.

[0080] The above has introduced in detail the handheld bushing electric pressing device and its pressing method provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A handheld electric bushing pressing-in device, characterized in that, Including: A plug (1) which is arranged above the mounting hole of the workpiece (7); An elastic clip (2) which can be deformed by force. The top of the elastic clip (2) can be in contact with the bottom of the plug (1), and the contact surfaces of the two are inclined planes. When the elastic clip (2) squeezes the plug (1) upward, the plug (1) squeezes the elastic clip (2) downward, causing the elastic clip (2) to contract radially; A guide sleeve (3) which is arranged at the bottom of the elastic clip (2) and is used to drive the elastic clip (2) to move; A driving device (4) which is used to drive the guide sleeve (3) to lift and lower in the mounting hole; A boss (21) for clamping the end of the shaft sleeve is further arranged at the top of the elastic clip (2). The outer diameter of the elastic clip (2) and the outer diameter of the guide sleeve (3) are the same and are both less than or equal to the inner diameter of the shaft sleeve, and the outer diameter of the shaft sleeve is less than or equal to the inner diameter of the mounting hole; The driving device (4) includes a lead screw (41) for inserting into the mounting hole, a driving motor (42) for driving the lead screw (41) to rotate, and a nut (43) sleeved on the outer periphery of the lead screw (41). The guide sleeve (3) is arranged on the nut (43); The plug (1) includes a first connecting portion (11) for connecting with the lead screw (41) and a first pressing portion (12) for pressing the elastic clip (2). The first connecting portion (11) and the first pressing portion (12) are of an integral structure, and the bottom surface of the first pressing portion (12) is a first inclined surface (13); The elastic clip (2) includes a second pressing portion (22) for pressing the plug (1) and a second connecting portion (23) for connecting with the guide sleeve (3). The second connecting portion (23) and the second pressing portion (22) are of an integral structure. A cavity (24) is provided through the center of the elastic clip (2). The cavity (24) is used to pass through the first connecting portion (11) and accommodate the contracted second pressing portion (22); the outer diameter of the first pressing portion (12) is the same as the outer diameter of the second connecting portion (23). The top surface of the second pressing portion (22) is a second inclined surface (26) and the bottom surface is a horizontal surface. The second inclined surface (26) is arranged in cooperation with the first inclined surface (13), and the horizontal surface is connected with the outer peripheral portion of the second connecting portion (23) to form the boss (21); If it is necessary to assemble multiple said bushings, at least one first bushing (5) is directly sleeved on the outer peripheral part of the guide sleeve (3) through the shrunk elastic clip (2), so that the guide sleeve (3) drives the first bushing (5) to be inserted into the mounting hole, and the second bushing (6) is sleeved on the elastic clip (2). After the elastic clip (2) is loosened, the end face of the bushing is abutted against the boss (21), so as to facilitate the elastic clip (2) to drive the second bushing (6) to move downward until the second bushing (6) and the first bushing (5) are assembled in place in the mounting hole; If only one said second bushing (6) needs to be inserted into the mounting hole, the second bushing (6) is directly sleeved on the outer peripheral part of the tightened elastic clip (2), and then the elastic clip (2) is loosened to make the end face of the second bushing (6) be clamped with the boss (21). After that, the driving device (4) is used to drive the guide sleeve (3) to descend, so that the elastic clip (2) drives the second bushing (6) to move downward until the second bushing (6) and the workpiece (7) are assembled in place; At least two slots (25) are arranged at equal intervals in the circumferential direction of the elastic clip (2); The inclination angle of the second inclined surface (26) is the same as that of the first inclined surface (13), and the included angle between the second inclined surface (26) and the horizontal line is 30° to 45°.

2. The hand-held bushing electric press-fitting device according to claim 1, characterized in that, The driving motor (42) includes an electric cylinder motor (421) and a battery (422) for charging the electric cylinder motor (421).

3. The hand-held bushing electric press-fitting device according to claim 1, characterized in that, The top of the guide sleeve (3) and the bottom of the elastic clip (2) are detachably connected.

4. A press-fitting method, applied to the handheld bushing electric press-fitting device described in any one of the above claims 1-3, characterized in that, Comprising: Tighten the elastic clip (2), and sequentially sleeve at least one first bushing (5) on the outer peripheral part of the elastic clip (2), and the first bushing (5) falls on the outer peripheral part of the guide sleeve (3); Insert the guide sleeve (3) and the elastic clip (2) into the mounting hole of the workpiece (7), and the elastic clip (2) exposes the end of the workpiece (7); Sleeve the second bushing (6) on the tightened elastic clip (2), and loosen the elastic clip (2) to make the end face of the second bushing (6) be clamped with the boss (21); The driving device (4) drives the guide sleeve (3) to descend, and the elastic clip (2) drives the second bushing (6) to move downward until the first bushing (5) and the second bushing (6) are abutted; The driving device (4) drives the guide sleeve (3) to ascend until the elastic clip (2) abuts against the plug (1) and the elastic clip (2) contracts radially, so as to withdraw the guide sleeve (3) and the elastic clip (2) from the workpiece (7) equipped with the bushing.

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