Positioning and press-fitting equipment for C-shaped bushing

Abstract

The invention relates to the field of die pressing, in particular to C-shaped bush positioning and press-fitting equipment which comprises a double-die alternate reducing device and a press-fitting device, and the press-fitting device is used for being matched with the double-die alternate reducing device to press a C-shaped bush into a workpiece to be mounted; the dual-mode alternate hole shrinkage device comprises a synchronous transposition driving mechanism and two guide type hole shrinkage molds connected to the synchronous transposition driving mechanism. An anti-rotation guide strip extending in the axial direction is arranged on the wall face of an inner hole of the guide type reducing die and is configured to be clamped into an opening of the C-shaped lining so as to limit rotation of the C-shaped lining. Through the anti-rotation guide strip, the C-shaped bush is always restrained by the anti-rotation guide strip, and the C-shaped bush is effectively prevented from rotating in the compression deformation or transfer process; and the interference problem that the die with the guide strip cannot be subjected to deep hole press fitting is solved in cooperation with a specially-made avoiding type press fitting head and a specially-made avoiding type bearing head.

Description

Technical Field

[0001] This invention relates to the field of molding equipment, and more specifically to a positioning and pressing device for a C-type bushing. Background Technology

[0002] C-type bushings typically need to be pressed into interference-fit mounting holes to function. There are two main technical challenges in automated press-fitting processes.

[0003] The diameter reduction is difficult because the diameter of the C-type bushing is larger than the mounting hole, so radial compression must be performed first. The existing step-by-step method (first reduce the diameter externally, then clamp and transfer) easily causes the C-type bushing to become larger due to elastic rebound during the transfer process, making it unable to enter the mounting hole smoothly.

[0004] Maintaining orientation is difficult; the opening direction of the C-type bushing must be aligned with features within the mounting hole (such as oil holes or locating pins); during strong compression, the C-type bushing is prone to uncontrollable rotation; and during the transfer from the external mold to the workpiece, there is a lack of effective constraint means to maintain its opening direction. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning and pressing device for C-type bushings, so as to solve the problem in the prior art that it is difficult to balance the reduction in diameter and the maintenance of the opening direction during the pressing process of C-type bushings.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A positioning and pressing device for C-type bushings, comprising: A dual-mode alternating diameter reduction device is configured to receive C-type bushings and transfer them to the press-fitting station; A pressing device, located at the pressing station, works in conjunction with the dual-mold alternating diameter reduction device to press the C-shaped bushing into the workpiece to be installed; in, The dual-mode alternating diameter reduction device includes a synchronous shifting drive mechanism and two guide-type diameter reduction dies connected to the synchronous shifting drive mechanism; The inner wall of the guide-type diameter reduction mold is provided with an anti-rotation guide strip extending along the axial direction. The anti-rotation guide strip is configured to engage with the opening of the C-shaped bushing to restrict its rotation.

[0007] Furthermore, the guide-type diameter reduction mold includes a diameter reduction guide cylinder, the inner hole of which includes tapered holes and cylindrical holes continuously arranged along the feeding direction; The anti-rotation guide strip extends continuously along the axial direction and penetrates the conical hole and the cylindrical hole.

[0008] Furthermore, it also includes a master mold, wherein the guide-type diameter reduction mold constitutes the cavity portion of the master mold, the workpiece to be installed is held on the master mold, and the mounting hole on the workpiece to be installed is coaxially aligned with the guide-type diameter reduction mold.

[0009] Furthermore, the pressing device includes a press and a clearance-type pressing head, wherein the press is used to drive the clearance-type pressing head to press the C-shaped bushing into the workpiece to be installed; The clearance-type press head is a columnar structure that can be inserted into the inner hole of the guide-type diameter reduction mold, and the side wall of the clearance-type press head is provided with clearance groove. The clearance groove is configured to accommodate the anti-rotation guide strip during the press stroke, so that the clearance-type press head can move axially within the guide-type diameter reduction mold without interfering with the anti-rotation guide strip.

[0010] Furthermore, the avoidance-type press head is connected to the press through a first elastic reset mechanism.

[0011] Furthermore, the pressing device also includes a relief bearing head, which is used to support the bottom of the C-shaped bushing when the C-shaped bushing is pressed into the workpiece to be installed; The clearance-type bearing head is a columnar structure capable of being inserted into the inner hole of the guide-type diameter reduction mold. Furthermore, the side wall of the clearance-type bearing head is provided with a clearance groove, which is configured to accommodate the anti-rotation guide strip during the pressing stroke, allowing the clearance-type bearing head to move axially within the guide-type diameter reduction mold without interfering with the anti-rotation guide strip. The pressing device is configured such that: the clearance pressing head presses down and contacts the upper end face of the C-shaped bushing, the clearance bearing head supports the lower end face of the C-shaped bushing, and then the clearance bearing head retracts downward synchronously with the feeding action of the clearance pressing head until the C-shaped bushing leaves the guide-type diameter reduction mold.

[0012] Furthermore, the avoidance bearing head is connected to the frame via a second elastic reset mechanism.

[0013] Furthermore, the synchronous shifting drive mechanism includes a second rotary driver and a third rotary driver that are coaxially nested; The second rotary driver is connected to a rotary disk, and the third rotary driver is connected to a rotating rod; the rotary disk and the rotating rod can rotate independently. The guide-type diameter reduction mold is slidably mounted on the rotary table; The second rotary driver is configured to drive the rotary table to rotate to exchange the positions of the two guide-type diameter reduction dies; the third rotary driver is configured to drive the two guide-type diameter reduction dies to slide on the rotary table via the rotating rod to adjust the distance between the two guide-type diameter reduction dies.

[0014] Furthermore, each of the two guide-type diameter-reducing dies is connected to a long rod slider, which is slidably connected to the rotary table, and the sliding directions of the two long rod sliders are parallel to each other; Each of the long rod sliders is connected to a cylindrical slider at its end. The rotating rod has a groove, and the cylindrical slider is slidably engaged in the groove. When the rotating rod rotates relative to the rotary table, the slide groove drives the two long rod sliders to move towards or away from each other by moving the cylindrical slider.

[0015] The beneficial effects of this invention compared to the prior art are: This invention, by setting a through-hole anti-rotation guide strip inside the guide-type reducing die, ensures that the C-type bushing is always under the constraint of the anti-rotation guide strip throughout the entire process from receiving the workpiece to pressing it in, effectively preventing the C-type bushing from rotating during compression deformation or transfer; combined with a specially designed avoidance press head and avoidance bearing head, it solves the interference problem of deep hole press-fitting in dies with guide strips, thereby achieving high-precision and high-efficiency automated press-fitting. Attached Figure Description

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] Figure 1 This is a perspective view of the dual-mode alternating diameter reduction device and the pressing device according to an embodiment of the present invention; Figure 2 This is a perspective view of the dual-mode alternating diameter reduction device according to an embodiment of the present invention; Figure 3 This is a front view of the pressing device according to an embodiment of the present invention; Figure 4 for Figure 3 A cross-sectional view along the GG direction; Figure 5 This is a perspective sectional view of the male and female molds in their pre-press-fitting state according to an embodiment of the present invention; Figure 6This is a perspective sectional view of the male and female molds in the completed pressing state according to an embodiment of the present invention; The labels in the diagram represent the following: 1-C type bushing; 11-Dual-mold alternating diameter reduction device; 111-Guided diameter reduction mold; 1111-Diameter reduction guide cylinder; 1112-Conical hole; 1113-Cylindrical hole; 1114-Anti-rotation guide strip; 112-Synchronous shifting drive mechanism; 1121-Second rotation driver; 1122-Third rotation driver; 1123-Long rod slider; 1124-Cylindrical slider; 1125-Rotating rod; 1126-Groove; 12-Pressure fitting device; 121-Press machine; 122-Male mold; 1221-Alternating pressure fitting head; 1222-First elastic reset mechanism; 123-Female mold; 1231-Alternating bearing head; 1232-Second elastic reset mechanism; 124-Workpiece to be installed. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] refer to Figures 1 to 6 This invention provides a positioning and pressing device for C-type bushings, which mainly consists of a dual-mold alternating diameter reduction device 11 and a pressing device 12, aiming to solve the problems of diameter reduction and orientation of C-type bushings 1 during the pressing process.

[0020] refer to Figure 1 and Figure 2 The dual-mode alternating diameter reduction device 11 includes two guide-type diameter reduction molds 111 and a synchronous shifting drive mechanism 112. Each guide-type diameter reduction mold 111 includes a diameter reduction guide cylinder 1111. The inner bore of the diameter reduction guide cylinder 1111 includes a continuous conical hole 1112 and a cylindrical hole 1113 along the axial direction, and an anti-rotation guide strip 1114 passing axially through the conical hole 1112 and the cylindrical hole 1113. The C-shaped bushing 1 can be placed in the conical hole 1112, and the opening of the C-shaped bushing 1 can clamp the anti-rotation guide strip 1114.

[0021] When the C-shaped bushing 1 is subjected to axial downward pressure, the C-shaped bushing 1 is squeezed into the interior of the cylindrical hole 1113, the opening of the C-shaped bushing 1 contracts inward, and the diameter of the C-shaped bushing 1 decreases. During this process, the anti-rotation guide strip 1114 is always engaged in the opening of the C-shaped bushing 1 to prevent it from rotating.

[0022] The synchronous shifting drive mechanism 112 is used to exchange the positions of the two guide-type diameter reduction dies 111. Specifically, the synchronous shifting drive mechanism 112 includes a second rotary driver 1121 and a third rotary driver 1122 coaxially nested. The second rotary driver 1121 is fixedly connected to the frame, and the third rotary driver 1122 is fixedly connected to a rotary table. The rotary table is fixedly connected to the actuator of the second rotary driver 1121. Two parallel sliding rod sliders 1123 are provided on the rotary table. One end of each long rod slider 1123 is connected to one of the guide-type diameter reduction dies 111, and the other end of each long rod slider 1123 is connected to a cylindrical slider 1124. The actuator of the third rotary driver 1122 is connected to a rotating rod 1125. The rotating rod 1125 is provided with a groove 1126 that is slidably connected to the cylindrical slider 1124 and allows the cylindrical slider 1124 to rotate therein.

[0023] Based on the above structure, when the third rotary actuator 1122 is working, the rotating rod 1125 drives the cylindrical slider 1124 to slide inside the slide groove 1126, so that the two long rod sliders 1123 symmetrically arranged on both sides of the actuator of the third rotary actuator 1122 move towards each other, so that the two guide-type diameter reduction molds 111 move closer to each other or further away from each other; while when the second rotary actuator 1121 is working, the two guide-type diameter reduction molds 111 exchange their positions, so that when one guide-type diameter reduction mold 111 is in the unloading station, the other guide-type diameter reduction mold 111 is in the pressing station.

[0024] refer to Figures 3 to 6 The pressing device 12 includes a press 121, a male mold 122, and a female mold 123. The female mold 123 is used to fix the workpiece 124 to be installed. The guide-type reducing mold 111 is part of the female mold 123 and performs the dual functions of the female mold 123 and transferring the C-type bushing 1.

[0025] The male mold 122 includes a clearance-type press-fit head 1221, and the female mold 123 includes a clearance-type bearing head 1231. Both the clearance-type press-fit head 1221 and the clearance-type bearing head 1231 are cylindrical in shape, capable of axially passing through the guide-type reducing die 111, and both the clearance-type press-fit head 1221 and the clearance-type bearing head 1231 have clearance grooves on their sidewalls to avoid the anti-rotation guide strip 1114. This design allows the clearance-type press-fit head 1221 and the clearance-type bearing head 1231 to apply pressure to both ends of the C-shaped bushing 1, avoiding the opening edge of the C-shaped bushing 1, accommodating the anti-rotation guide strip 1114, and preventing mechanical interference and damage to the C-shaped bushing 1.

[0026] Specifically, the clearance-type press-fit head 1221 is connected to the execution part of the press 121 via a first elastic reset mechanism 1222, while the clearance-type bearing head 1231 is connected to the frame via a second elastic reset mechanism 1232. When the press 121 is operating, the clearance-type press-fit head 1221 first inserts into the interior of the C-shaped bushing 1, applying pressure to the top of the C-shaped bushing 1 using its stepped surface. The C-shaped bushing 1 moves downward along the conical hole 1112, radially contracting and moving along the cylindrical hole 1113 to the mounting hole on the workpiece 124 to be installed. During this process, the clearance-type bearing head 1231 supports the bottom of the C-shaped bushing 1 from below, maintaining the axis of the C-shaped bushing 1 itself from deviating from the axis of the mounting hole, and synchronously retracts with the feed of the clearance-type press-fit head 1221.

[0027] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of the embodiments of the present invention.

Claims

1. A positioning and pressing device for C-type bushings, characterized in that... ,include: A dual-mode alternating diameter reduction device (11) is configured to receive the C-type bushing (1) and transfer it to the press-fitting station; A pressing device (12) is installed at the pressing station and works in conjunction with the dual-mold alternating diameter reduction device (11) to press the C-shaped bushing (1) into the workpiece (124) to be installed; in, The dual-mode alternating diameter reduction device (11) includes a synchronous shifting drive mechanism (112) and two guide-type diameter reduction dies (111) connected to the synchronous shifting drive mechanism (112); The inner wall of the guide-type reducing die (111) is provided with an anti-rotation guide strip (1114) extending axially. The anti-rotation guide strip (1114) is configured to engage with the opening of the C-type bushing (1) to restrict its rotation.

2. The positioning and pressing equipment according to claim 1, characterized in that... , The guide-type diameter reduction mold (111) includes a diameter reduction guide cylinder (1111), the inner hole of which includes a tapered hole (1112) and a cylindrical hole (1113) continuously arranged along the feeding direction; The anti-rotation guide strip (1114) extends continuously along the axial direction and penetrates the conical hole (1112) and the cylindrical hole (1113).

3. The positioning and pressing equipment according to claim 2, characterized in that... , It also includes a female mold (123), the guide-type reducing mold (111) forming the cavity portion of the female mold (123), the workpiece to be installed (124) is held on the female mold (123), and the mounting hole on the workpiece to be installed (124) is coaxially aligned with the guide-type reducing mold (111).

4. The positioning and pressing equipment according to claim 1, characterized in that... , The pressing device (12) includes a press (121) and a clearance-type pressing head (1221). The press (121) is used to drive the clearance-type pressing head (1221) to press the C-type bushing (1) into the workpiece (124) to be installed. The clearance press head (1221) is a columnar structure that can be inserted into the inner hole of the guide-type diameter reduction mold (111), and the side wall of the clearance press head (1221) is provided with clearance groove. The clearance groove is configured to accommodate the anti-rotation guide strip (1114) during the press stroke, so that the clearance press head (1221) can move axially within the guide-type diameter reduction mold (111) without interfering with the anti-rotation guide strip (1114).

5. The positioning and pressing equipment according to claim 4, characterized in that... , The avoidance type press head (1221) is connected to the press (121) through the first elastic reset mechanism (1222).

6. The positioning and pressing equipment according to claim 4, characterized in that... , The pressing device (12) further includes a clearance bearing head (1231), which is used to support the bottom of the C-shaped bushing (1) when the C-shaped bushing (1) is pressed into the workpiece (124) to be installed; The clearance-type bearing head (1231) is a columnar structure capable of being inserted into the inner hole of the guide-type diameter reduction mold (111). Furthermore, the side wall of the clearance-type bearing head (1231) is provided with a clearance groove, which is configured to accommodate the anti-rotation guide strip (1114) during the pressing stroke, allowing the clearance-type bearing head (1231) to move axially within the guide-type diameter reduction mold (111) without interfering with the anti-rotation guide strip (1114). The pressing device (12) is configured such that: the clearance pressing head (1221) presses down and contacts the upper end face of the C-shaped bushing (1), the clearance bearing head (1231) supports the lower end face of the C-shaped bushing (1), and then the clearance bearing head (1231) retracts downward synchronously with the feeding action of the clearance pressing head (1221) until the C-shaped bushing (1) leaves the guide-type reducing die (111).

7. The positioning and pressing equipment according to claim 6, characterized in that... , The avoidance type bearing head (1231) is connected to the frame through the second elastic reset mechanism (1232).

8. The positioning and pressing equipment according to claim 1, characterized in that... , The synchronous shifting drive mechanism (112) includes a second rotary driver (1121) and a third rotary driver (1122) arranged coaxially. The second rotary actuator (1121) is connected to a rotary disk, and the third rotary actuator (1122) is connected to a rotating rod (1125). The rotary disk and the rotating rod (1125) can rotate independently. The guide-type diameter reduction mold (111) is slidably mounted on the rotary table; The second rotary driver (1121) is configured to drive the rotary table to rotate to exchange the positions of the two guide-type reducing dies (111); the third rotary driver (1122) is configured to drive the two guide-type reducing dies (111) to slide on the rotary table via the rotating rod (1125) to adjust the spacing between the two guide-type reducing dies (111).

9. The positioning and pressing equipment according to claim 8, characterized in that... , Each of the two guide-type diameter reduction dies (111) is connected to a long rod slider (1123), the long rod slider (1123) is slidably connected to the rotary table, and the sliding directions of the two long rod sliders (1123) are parallel to each other; Each of the long rod sliders (1123) is connected to a cylindrical slider (1124) at its end. The rotating rod (1125) has a groove (1126) on it, and the cylindrical slider (1124) is slidably engaged in the groove (1126). When the rotating rod (1125) rotates relative to the rotary table, the slide (1126) drives the two long rod sliders (1123) to move towards or away from each other by moving the cylindrical slider (1124).

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