Necking press-fitting device and method

Abstract

The invention discloses a necking press-fitting device in the field of mechanical assembly, and the necking press-fitting device comprises a first rack on which a lower pressing head is movably mounted; the second machine frame is fixed to the first machine frame, an upper pressing head which is coaxially arranged with the lower pressing head in space is fixed to the second machine frame, and the lower pressing head is stressed to be close to / away from the upper pressing head; the driving body is movably installed on the second rack through a follow-up assembly, and a compression assembly is arranged at the output end of the driving body; wherein the driving body drives to achieve bidirectional tightening of the compression assembly, and the spatial positions of the driving body and the lower pressing head are switched synchronously; according to the device, the notch closing effect on the lining is achieved through the compression assembly, the compression assembly and the lower pressing head are driven by the follow-up assembly to move synchronously, the necking-down lining is arranged in the installation opening of the swing arm, in this way, mechanical damage caused by conventional installation is avoided, and the service life of the device is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical assembly, and in particular to a shrinking press-fitting device and method. Background Art

[0002] With the development of industry, the output of mechanical equipment with manufacturing functions is increasing. Most of these machines use swing arms. The swing arms are installed on the main body of the equipment to achieve swing within a certain range, which is convenient for the movement of equipment such as the gripper. The swing arms usually need bushings for installation during assembly. Such bushings are axially provided with openings. The conventional installation method uses upper and lower pressure blocks for joint press-fitting. This method will cause certain damage to the installation port of the swing arm and the surface of the bushing during the press-fitting process, which will affect the service life of the equipment and affect the steering and activity performance of the product. How to achieve lossless installation is what technicians need to solve. Summary of the invention

[0003] The purpose of the present application is to provide a shrinkage press-fitting device and method to solve the defect in the prior art that the bushing may be damaged during conventional press-fitting.

[0004] In order to achieve the above objectives, this application is implemented by adopting the following technical solutions: In a first aspect, the present application discloses a shrinking press-fitting device, which comprises: A first frame, on which a pressing head is movably mounted; A second frame, the second frame is fixed on the first frame, an upper pressing head arranged coaxially with the lower pressing head in space is fixed on the second frame, and the lower pressing head is forced to approach / move away from the upper pressing head; A driving body, wherein the driving body is movably mounted on the second frame through a follower assembly, and a compression assembly is provided at the output end of the driving body; wherein the driving body drives the compression assembly to achieve bidirectional tightening, and the spatial positions of the driving body and the lower pressure head are switched synchronously.

[0005] According to a further solution of the present application, a press-fitting cylinder is fixed on the first frame, and a telescopic rod of the press-fitting cylinder is fixedly connected to the lower pressing head.

[0006] According to a further solution of the present application, the follower assembly includes a first connecting member fixed on the first frame, a second connecting member is slidably provided on the first connecting member via a slide rail mechanism, the second connecting member is fixedly connected to the driving body, a follower cylinder is fixed on the first connecting member, and a telescopic rod of the follower cylinder is connected to the second connecting member.

[0007] In a further solution of the present application, the compression assembly includes a first pressing block and a second pressing block, and the first pressing block and the second pressing block are provided with shaping openings on opposite surfaces, and the two shaping openings are forced to close together to form a cavity; The first pressing block is connected to the first output end of the driver, and the second pressing block is connected to the second output end of the driver. The driver synchronously drives the first output end and the second output end to move away from or close to each other, so that the first pressing block is separated from or merged with the second pressing block.

[0008] A further solution is that the driving body includes a motor, a positive and negative screw rod and a mounting seat, the mounting seat fixes the follower assembly, the motor is fixed to the mounting seat, one end of the positive and negative screw rod is transmission-mounted on the output shaft of the motor, the positive segment of the positive and negative screw rod is threadedly connected with a first nut piece, the negative segment of the positive and negative screw rod is threadedly connected with a second nut piece, at least two first guide posts and two second guide posts are movably installed on the mounting seat, the first guide post and the second guide post are parallel to the positive and negative screw rod, one end of the two first guide posts close to the motor is fixedly connected to the first nut piece, and the other end is fixedly connected to the first pressure block; one end of the two second guide posts close to the motor is fixedly connected to the second nut piece, and the other end is fixedly connected to the second pressure block.

[0009] In a further solution, a plurality of the first guide pillars and the second guide pillars are evenly and equidistantly mounted on the mounting seat.

[0010] According to a further solution of the present application, a positioning groove is provided on the compression assembly, a positioning member is slidably provided in the positioning groove, and the positioning member movably positions the notch of the bushing on the lower pressure head.

[0011] According to a further solution of the present application, the arrangement direction of the lower pressure head and the upper pressure head is perpendicular to the arrangement direction of the driving body.

[0012] According to a further solution of the present application, a temporary storage station is provided on the first rack.

[0013] In a second aspect, the present application discloses a press-fitting method, which comprises: Place the bushing on the lower pressure head and fix the mounting opening of the swing arm on the upper pressure head; Starting the driving body to drive the compression assembly to perform bidirectional tightening operation until the notch on the bushing is closed; The accompanying assembly is started synchronously to drive the driving body to move toward the upper pressure head. At the same time, the lower pressure head is synchronously moved toward the upper pressure head by the external force. The lower pressure head presses the bushing into the mounting opening of the swing arm until the bushing is separated from the compression assembly and deformed and reset to be fixed in the mounting opening.

[0014] The beneficial effects of this application are: The present application provides a compression assembly, which realizes the closing effect of the notch of the bushing by moving the driving body, and moves synchronously with the lower pressure head under the drive of the follower assembly, so as to place the shrunken bushing in the mounting opening of the swing arm. At this time, the relative contact surfaces between the mounting opening and the bushing will not generate a large friction force. Finally, after releasing the compression assembly, the bushing returns to its deformation and is firmly fixed in the mounting opening, thus avoiding the mechanical damage caused by conventional installation and enhancing the service life of the equipment.

[0015] The driving body uses a bidirectional screw to perform bidirectional synchronous shrinking operations on the first pressure block and the second pressure block. At this time, the synchronous movement of the first pressure block and the second pressure block can accelerate the shrinking efficiency of the bushing and make the compression process more stable, which is convenient for later installation with the installation port on the swing arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the necking press-fitting device in the embodiment of the present application; Figure 2 This is a structural schematic diagram of the necking press-fitting device from another perspective in the embodiment of the present application; Figure 3 This is a schematic diagram for illustrating the structure of the necking component in the embodiment of the present application; Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0017] Among them: 1. First frame; 2. Second frame; 3. Driving body; 4. Follow-up assembly; 5. Compression assembly; 11. Press-fitting cylinder; 12. Lower pressure head; 100. Swing arm; 200. Bushing; 21. Upper pressure head; 31. Positive and negative threaded screw; 32. Motor; 33. First nut member; 34. First guide column; 35. Second nut member; 36. Second guide column; 37. Mounting seat; 41. First connecting member; 42. Second connecting member; 43. Follow-up cylinder; 51. First pressure block; 52. Second pressure block; 511. Positioning member; 512. Positioning groove. DETAILED DESCRIPTION Embodiment 1

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use.

[0019] like Figure 1 and Figure 2As shown, a shrinking press-fitting device is disclosed in the present embodiment, which can realize lossless installation of the bushing 200 and the swing arm 100, and the device includes: a first frame 1, a second frame 2 and a driving body 3, wherein a lower pressure head 12 is movably mounted on the first frame 1; the second frame 2 is vertically fixed on the first frame 1, and an upper pressure head 21 is fixed on the second frame 2 which is coaxially arranged with the lower pressure head 12 in space, and the lower pressure head 12 can approach / move away from the upper pressure head 21 when subjected to force movement; the two pressure heads cooperate to smoothly install the bushing 200, and the driving body 3 is movably set on the second frame 2 through a follower assembly 4, and a compression assembly 5 is provided at the output end of the driving body 3; wherein the compression assembly 5 can realize bidirectional tightening when the driving body 3 is working, and the spatial positions of the driving body 3 and the lower pressure head 12 are switched synchronously.

[0020] When in use, the bushing 200 is placed on the compression component 5, and the driving body 3 is started so that the compression component 5 radially compresses the bushing 200 until the notch on the bushing 200 is closed, and the swing arm 100 is fixed to the second frame 2 by a mechanical arm. At this time, the mounting port of the swing arm 100 is placed at the upper pressure head 21 and fixed by a mechanical arm. The closed bushing 200 rises with the position of the lower pressure head 12. In this process, the compression component 5 and the lower pressure head 12 rise synchronously under the drive of the follower component 4 until the bushing 200 is installed in the mounting port of the swing arm 100. At this time, the driving body 3 drives the compression component 5 to release the bushing 200, and descends synchronously with the lower pressure head 12. After the position is in place, it is ready for the installation of the next matching workpiece.

[0021] As attached Figure 1 As shown, in this embodiment, a press cylinder 11 is fixed in the first frame 1, and the end of the telescopic rod of the press cylinder 11 is fixedly connected to the lower press head 12. The press cylinder 11 drives the lower press head 12 to move along the arrangement direction of the upper and lower press heads 12. In some other embodiments, if a workpiece with large mass appears, the press cylinder 11 can be replaced by a compression cylinder.

[0022] As attached Figure 1 and 2 As shown, the follower assembly 4 in this embodiment includes a first connecting member 41 and a follower cylinder 43 fixed on the first frame 1, and a second connecting member 42 is slidably arranged on the first connecting member 41 through a slide rail mechanism. Usually, the slide rail mechanism uses a slider and a slide rail to cooperate, the slider is fixed on the second connecting member 42, and the slide rail is fixed on the first connecting member 41. The slider and the slide rail cooperate with each other. In this embodiment, two groups of sliders and two groups of slide rails are respectively arranged, and the two slide rails are arranged in parallel. The moving route of the second connecting member 42 here is parallel to the moving route of the lower pressure head 12, and the bottom of the second connecting member 42 is fixedly connected to the driving body 3, and the follower cylinder 43 is fixed to the first connecting member 41. The telescopic rod of the follower cylinder 43 is connected to the second connecting member 42, and the follower cylinder 43 drives the second connecting member 42 and the driving body 3 to move up and down.

[0023] As attached Figure 3 As shown, in this embodiment, the compression assembly 5 includes a first pressing block 51 and a second pressing block 52, and the first pressing block 51 and the second pressing block 52 are provided with shaping openings on the opposite surfaces. The two shaping openings are closed by force to form a cavity, and the cavity is a through type, and the cross section is the same as the cross section of the bushing 200. Different pressing blocks are replaced according to the shape of the shrinking part, that is, the bushing 200 during production; the first pressing block 51 is connected to the first output end of the driving body 3, and the second pressing block 52 is connected to the second output end of the driving body 3. The driving body 3 synchronously drives the first output end and the second output end to move away or close to each other, so as to realize the separation or merging of the first pressing block 51 and the second pressing block 52. It should be noted here that the spacing between the first pressing block 51 and the second pressing block 52 needs to be set correctly during installation. The two pressing blocks are arranged on both sides of the lower pressure head 12, and the first pressing block 51 and the second pressing block 52 are symmetrically arranged about the lower pressure head 12; in addition, the arrangement direction of the lower pressure head 12 and the upper pressure head 21 is perpendicular to the arrangement direction of the driving body 3.

[0024] In a further embodiment, the driving body 3 uses a motor 32 and a "bidirectional screw" for a matching device. The driving body 3 includes a motor 32, a positive and negative threaded screw 31 and a mounting seat 37. The mounting seat 37 fixes the second connecting member 42. The motor 32 is fixed to the mounting seat 37. One end of the positive and negative threaded screw 31 is transmission-mounted on the output shaft of the motor 32. The positive thread segment of the positive and negative threaded screw 31 is threadedly connected with a first nut member 33, and the negative thread segment of the positive and negative threaded screw 31 is threadedly connected with a second nut member 35. Two first guide posts 34 and two second guide posts 36 are movably mounted on the mounting seat 37. Four through holes arranged in a diamond shape are opened on a side wall plate of the mounting seat 37 close to the compression assembly 5. Usually, the first guide posts 34 and the second guide posts 36 are arranged alternately, and the first guide posts 34 and the second guide posts 36 are parallel to the positive and negative threaded rods 31. One end of the first guide post 34 close to the motor 32 is fixedly welded to the first nut member 33, and the other end is fixedly welded to the first pressing block 51; one end of the two second guide posts 36 close to the motor 32 is fixedly welded to the first nut member 33, and the other end is fixedly welded to the first pressing block 51; It is welded on the second nut member 35, and the other end is fixedly welded on the second pressure block 52; when in use, the driving motor 32 drives the forward and reverse screw rods 31 to rotate. Since the threads arranged on the forward and reverse screw rods 31 are divided into two types, and the rotation directions of the two threads are opposite, this results in that when the forward and reverse screw rods 31 rotate unidirectionally, the second nut member 35 and the first nut member 33 above move in opposite directions, that is, the corresponding guide column drives the corresponding pressure block to move, and finally realizes the bidirectional pressing or release of the first pressure block 51 and the second pressure block 52. The sleeve 200.

[0025] In a further embodiment, two first guide pillars 34 and two second guide pillars 36 are evenly and equidistantly mounted on the mounting seat 37 .

[0026] As attached Figure 3 And body 4, in the embodiment, a positioning groove 512 is provided on the first pressing block 51, and a positioning member 511 is slidably provided in the positioning groove 512, and the positioning member 511 movably positions the notch of the bushing 200 on the lower pressing head 12. With the setting of the positioning member 511, when the bushing 200 is installed on the lower pressing head 12, the direction of the notch of the bushing 200 can be positioned to avoid the notch of the bushing 200 facing the first pressing block 51 or the second pressing block 52, that is, to avoid facing the force-bearing side, thereby preventing the failure of the shrinking operation; to improve the working efficiency, in some embodiments, a spring is used to connect the first pressing block 51 and the positioning member 511. After the operator uses the positioning member 511 to position it, it automatically resets under the deformation of the spring, which is convenient for re-operation.

[0027] In a further embodiment, the designer sets a temporary storage station on the first frame 1 for placing the bushing 200 . Embodiment 2

[0028] This embodiment provides a press-fitting method, which is based on the necking press-fitting device in the above-mentioned embodiment 1, and includes the following steps: The robot fixes the mounting port of the swing arm 100 at the upper pressure head 21 and fixes it, and manually or mechanically places the bushing 200 on the lower pressure head 12, and uses the positioning piece 511 to position it, and then starts the motor 32 to drive the forward and reverse screws 31 to rotate, driving the first pressure block 51 and the second pressure block 52 to shrink the bushing 200, and then starts the press cylinder 11 and the follower cylinder 43 to synchronously drive the compression assembly 5 and the bushing 200 to move to the upper pressure head 21, and the lower pressure head 12 acts on the bushing 200 to enter the mounting port of the swing arm 100 until the bushing 200 is released and fixed at the mounting port of the swing arm 100, and the press cylinder 11 and the follower cylinder 43 are reset to perform the next round of shrinking and pressing operations. This equipment has high operating efficiency and does not damage the mounting surface of the parts, thereby enhancing the service life of the product.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, 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, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

Claims

1. A necking press-fitting device, characterized in that: include: A first frame (1), on which a lower pressure head (12) is movably mounted; A second frame (2), the second frame (2) being fixed on the first frame (1), an upper pressing head (21) being spatially coaxially arranged with the lower pressing head (12) being fixed on the second frame (2), the lower pressing head (12) being forced to approach or move away from the upper pressing head (21); A driving body (3), wherein the driving body (3) is movably mounted on the second frame (2) via a follower assembly (4), and a compression assembly (5) is provided at the output end of the driving body (3); wherein the driving body (3) drives the compression assembly (5) to achieve bidirectional tightening, and the spatial positions of the driving body (3) and the lower pressure head (12) are switched synchronously.

2. The necking press-fitting device according to claim 1, characterized in that: A press-fitting cylinder (11) is fixed on the first frame (1), and a telescopic rod of the press-fitting cylinder (11) is fixedly connected to the lower pressing head (12).

3. The necking press-fitting device according to claim 1, characterized in that: The follower assembly (4) comprises a first connecting member (41) fixed on the first frame (1); a second connecting member (42) is slidably arranged on the first connecting member (41) via a slide rail mechanism; the second connecting member (42) is fixedly connected to the driving body (3); a follower cylinder (43) is fixed on the first connecting member (41); and a telescopic rod of the follower cylinder (43) is connected to the second connecting member (42).

4. The necking press-fitting device according to claim 1, characterized in that: The compression assembly (5) comprises a first compression block (51) and a second compression block (52); the first compression block (51) and the second compression block (52) are provided with shaping openings on opposite surfaces thereof; the two shaping openings are closed under force to form a cavity; The first pressing block (51) is connected to a first output end of the driving body (3), and the second pressing block (52) is connected to a second output end of the driving body (3); the driving body (3) synchronously drives the first output end and the second output end to move away from or towards each other, so that the first pressing block (51) and the second pressing block (52) are separated or merged.

5. The necking press-fitting device according to claim 4, characterized in that: The driving body (3) comprises a motor (32), a positive and negative threaded screw rod (31) and a mounting seat (37), wherein the mounting seat (37) fixes the follower assembly (4), the motor (32) is fixed to the mounting seat (37), one end of the positive and negative threaded screw rod (31) is drivingly mounted on the output shaft of the motor (32), a first nut member (33) is threadedly connected on the positive threaded section of the positive and negative threaded screw rod (31), a second nut member (35) is threadedly connected on the negative threaded section of the positive and negative threaded screw rod (31), and the mounting seat (3 7) at least two first guide pillars (34) and two second guide pillars (36) are movably mounted on the first guide pillars (34) and the second guide pillars (36), the first guide pillars (34) and the second guide pillars (36) are parallel to the forward and reverse threaded rods (31), one end of the two first guide pillars (34) close to the motor (32) is fixedly connected to the first nut member (33), and the other end is fixedly connected to the first pressing block (51); one end of the two second guide pillars (36) close to the motor (32) is fixedly connected to the second nut member (35), and the other end is fixedly connected to the second pressing block (52).

6. The necking press-fitting device according to claim 4, characterized in that: A plurality of the first guide pillars (34) and the second guide pillars (36) are evenly and equidistantly mounted on the mounting seat (37).

7. The necking press-fitting device according to claim 1, characterized in that: The compression assembly (5) is provided with a positioning groove (512), a positioning piece (511) is slidably provided in the positioning groove (512), and the positioning piece (511) movably positions the notch of the upper bushing (200) of the lower pressure head (12).

8. The necking press-fitting device according to claim 1, characterized in that: The arrangement direction of the lower pressure head (12) and the upper pressure head (21) is perpendicular to the arrangement direction of the driving body (3).

9. The necking press-fitting device according to any one of claims 1 to 8, characterized in that: The first frame (1) is provided with a temporary storage station.

10. A press-fitting method based on the press-fitting necking press-fitting device according to any one of claims 1 to 9, characterized in that: include: Place the bushing (100) on the lower pressure head (12) and fix the mounting opening of the swing arm (200) on the upper pressure head (21). Starting the driving body (3) to drive the compression assembly (5) to perform bidirectional tightening operations until the notch on the bushing is closed; The accompanying assembly (4) is started synchronously to drive the driving body (3) to move toward the upper pressure head (21), and the lower pressure head (12) is simultaneously moved toward the upper pressure head (21) by the external force, and the lower pressure head (12) presses the bushing (100) into the mounting opening of the swing arm (200) until the bushing (100) is separated from the compression assembly (5) and deformed and reset to be fixed in the mounting opening.

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