A press-fitting tool for improving the pull-out force of the subframe bushing cover

Abstract

The present invention relates to the field of bushing press-fitting, and specifically to a press-fitting tool for improving the pull-out force of a bushing cover plate of a subframe, comprising a workbench and an L-shaped mounting plate arranged on the workbench, a hydraulic rod arranged on the L-shaped mounting plate, a horizontal plate arranged on the hydraulic rod, a press-fitting mechanism arranged on the horizontal plate for pressing a columnar recess of an upper cover plate into an inner frame of the bushing; the press-fitting mechanism comprises a pressing plate, the pressing plate is slidably connected to the horizontal plate through a plurality of connecting rods, a rectangular block is arranged on the pressing plate, an extrusion column is arranged on the rectangular block; a mounting hole extending downward and penetrating the rectangular block and the extrusion column is arranged at the center of the pressing plate, a horizontal plate is slidably arranged in the mounting hole, and a guiding deformation mechanism is also arranged on the horizontal plate, which can make a corresponding deformation strip tilt and deform as the horizontal plate moves. The present invention can gradually apply pressure to the upper cover plate, ensure the pressing accuracy of the upper cover plate, and can cause the deformation strip to deform, thereby further improving the pull-out force of the upper cover plate.

Description

Technical Field

[0001] The invention relates to the field of bushing press-fitting, and in particular to a press-fitting tool for improving the pull-out force of a bushing cover plate of a sub-frame. Background Art

[0002] The bushing is an indispensable flexible connection part in the automobile structure. Its structure is a metal shaft covered with non-metallic materials. When the bushing is pressed into the subframe, it will be pressed into the subframe collar from the cover side; during this process, the cover and bushing will bear a large load. Insufficient cover pull-out force will cause the cover to fall off.

[0003] Some existing press-fitting mechanisms do not have a buffer mechanism. During the press-fitting process, if there is no buffer force, the workpiece will be damaged to varying degrees, affecting the performance and life of the workpiece. Secondly, since the bushing and the subframe are fitted with an interference fit, it is easy for the bushing to crack, the bushing to not be pressed in place, the bushing to tilt, etc., leading to the scrapping of the bushing. Therefore, when the bushing cover is press-fitted, it is necessary to ensure that the cover is evenly stressed so that the cover has sufficient pull-out force. Summary of the invention

[0004] The main purpose of the present invention is to provide a pressing tool for improving the pull-out force of the subframe bushing cover plate. Through the cooperation of a pressing plate, a horizontal plate and a triangular pressing block, pressure can be slowly applied to the upper cover plate, and the columnar sink groove of the upper cover plate can be supported by an extrusion column to ensure the accuracy of its connection. The two triangular pressing blocks move along an arc trajectory so that the deformation strip can fit with the inclined surface of the corresponding right-angle trapezoidal groove, thereby performing secondary fixation on the upper cover plate and further improving the pull-out force of the upper cover plate.

[0005] To achieve the above-mentioned purpose, the present invention provides a pressing tool for improving the pull-out force of the subframe bushing cover plate, including an upper cover plate and an inner frame of the bushing; a columnar groove is protruding outward from the center of the upper cover plate, an extrusion hole is provided at the center of the bottom of the columnar groove, and a deformation strip is provided on the inner wall of the extrusion hole in a mirror image; the inner frame of the bushing is cylindrical, and a socket for accommodating the columnar groove is provided at the center of the inner frame of the bushing, and two right-angled trapezoidal grooves for accommodating corresponding deformation strips are provided on the inner wall of the socket in a mirror image; it also includes a workbench, a pressing mechanism and a guiding deformation mechanism; an L-shaped mounting plate is provided on one side of the workbench, and a hydraulic rod is provided at the end of the L-shaped mounting plate away from the workbench, the hydraulic rod is arranged in a vertical state, the actuator of the hydraulic rod passes through the L-shaped mounting plate and is provided with a horizontal plate, the pressing mechanism is arranged on the horizontal plate and is used to press the columnar groove of the upper cover plate into the extrusion hole; the pressing mechanism includes a pressing plate and a buffer spring; the pressing plate is in a horizontal state It is arranged below the horizontal plate, and four connecting rods are arranged in a rectangular distribution on the top of the pressing plate, each connecting rod passes through the horizontal plate and is provided with a limit plate, and a buffer spring is sleeved on each connecting rod; a rectangular block is arranged at the bottom of the pressing plate, and an extrusion column matching the columnar sink is arranged at the center of the rectangular block; a mounting hole extending downward and passing through the rectangular block and the extrusion column is arranged at the center of the pressing plate, and a horizontal plate is slidably arranged in the mounting hole, and the horizontal plate can move back and forth along the axis of the mounting hole as the horizontal plate moves; a guiding deformation mechanism is arranged on the horizontal plate and can deform the corresponding deformation strip and fit the inclined surface of the corresponding right-angle trapezoidal groove as the horizontal plate moves; a sliding groove is arranged at the center of the bottom of the horizontal plate, and the guiding deformation mechanism includes two moving blocks slidably arranged in the sliding groove, and the two moving blocks can approach or move away from each other as the horizontal plate moves, and a triangular pressing block is arranged at the end of each moving block away from the corresponding sliding groove.

[0006] Preferably, two positioning grooves are mirrored on the inner wall of the mounting hole, and two positioning blocks cooperating with the positioning grooves are mirrored on the outer wall of the horizontal disk. The positioning blocks can be slidably arranged in the corresponding positioning grooves. A horizontal bar is also arranged in the mounting hole, and both ends of the horizontal bar are respectively arranged at the ends of the corresponding positioning grooves. Positioning rods extending toward the horizontal disk are arranged at both ends of the horizontal bar. The positioning rods pass through the corresponding positioning blocks and are provided with a resistance disk. The positioning rods are located in the corresponding positioning grooves. A reset spring is sleeved on each positioning rod, and the reset spring is located between the corresponding positioning block and the horizontal bar; two contact rods are mirrored at the top edge of the horizontal disk.

[0007] Preferably, the guiding deformation mechanism also includes a bidirectional screw rod; the bidirectional screw rod is rotatably arranged in the sliding groove, and the two ends of the bidirectional screw rod are respectively threadedly connected to the corresponding moving blocks, and a driving gear is also arranged at the center of the double-wire screw rod, and a rectangular avoidance groove for avoiding the driving gear is arranged at the center of the horizontal disk, and the rectangular avoidance groove and the sliding groove are arranged in a cross shape; a vertical rack is arranged on the horizontal bar, and the vertical rack extends upward and is arranged in the rectangular avoidance groove and meshes with the driving gear.

[0008] Preferably, a right-angled triangular groove is provided on one side of each right-angled trapezoidal groove away from the mounting hole, a transverse groove is provided on one side of each triangular pressing block away from the moving block, a transverse bar is slidably arranged in each transverse groove, a rectangular groove is provided at the center of the inner wall of the bottom of each transverse groove, a synchronous gear is rotatably arranged in each rectangular groove, a plurality of tooth grooves are arranged along the length direction on one side of each transverse bar close to the corresponding rectangular groove, the synchronous gear meshes with the tooth grooves on the corresponding transverse bar, a U-shaped plate is provided at the center of the bottom of the horizontal disk, a telescopic rod is provided at the center of the U-shaped plate, one end of the telescopic rod away from the U-shaped plate passes through the horizontal bar and is provided with a transverse rack, a receiving groove for receiving the transverse rack is provided on each triangular pressing block, the receiving groove communicates with the corresponding rectangular groove, and both ends of the transverse rack are respectively meshed with the corresponding synchronous gears.

[0009] Preferably, both ends of each transverse bar are set to be rounded corners.

[0010] Preferably, two magnetic positioning pins are arranged on the rectangular block in a mirror image manner, and two positioning holes for receiving the magnetic positioning pins are provided on the upper cover plate.

[0011] Preferably, two top blocks are further provided on the horizontal bar.

[0012] Preferably, a positioning mechanism for fixing the inner skeleton of the bushing is further provided on the workbench.

[0013] Preferably, the positioning mechanism includes a fixed motor and a fixed bar; a circular groove is provided at the center of the workbench, the fixed motor is vertically arranged at the bottom of the workbench, the output shaft of the fixed motor passes through the workbench and extends into the circular groove and is provided with a first bevel gear, a plurality of fixed grooves are arranged on the top of the workbench along the axis direction of the circular groove, there are a plurality of fixed bars, the fixed bars are slidably arranged in the corresponding fixed grooves, a fixed lead screw is rotatably arranged in each fixed groove, the fixed lead screw is threadedly connected with the corresponding fixed bar, one end of each fixed lead screw close to the circular groove extends into the circular groove and is provided with a second bevel gear, and the first bevel gear meshes with the corresponding second bevel gear respectively.

[0014] The beneficial effects of the present invention compared with the prior art are as follows:

[0015] 1. Through the cooperation of the horizontal plate and the pressing plate, driven by the hydraulic rod, the horizontal plate indirectly applies pressure to the pressing plate through the buffer spring, so as to realize the large-load pre-pressing of the upper cover plate, and press the columnar sinking groove into the insertion hole of the inner skeleton of the bushing by interference fit, thereby ensuring the connection strength between the upper cover plate and the inner skeleton of the bushing.

[0016] 2. The present invention cooperates with the horizontal disk through the triangular pressing block. As the horizontal disk moves, the two moving blocks arranged on the horizontal disk can move away from each other while descending. The triangular pressing block arranged on the moving block can contact the corresponding deformation strip along an arc trajectory, so that the deformation strip can be bent preferentially from the end and gradually pressed down and bent along the length direction, thereby avoiding brittle fracture of the deformation strip.

[0017] 3. According to the present invention, the two triangular lower pressure blocks can move away from each other as the horizontal plate moves through the cooperation of the transverse bars and the transverse racks. In the process of moving away, the transverse racks can drive the synchronous gears to rotate, and the synchronous gears mesh with the tooth grooves on the transverse bars, thereby driving the corresponding transverse bars to move toward the direction close to the corresponding right-angled triangle grooves, so that the ends of the deformation bars can be deformed for the second time, so that the deformation bars form an obtuse angle at the contact position between the right-angled trapezoidal groove and the right-angled triangle groove, thereby further improving the pull-out force of the upper cover plate and preventing the upper cover plate from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention, so that other features, purposes and advantages of the present invention become more obvious. The accompanying drawings of the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 is a stereogram of the present invention;

[0020] Figure 2 It is the local stereoscopic Figure 1 ;

[0021] Figure 3 is a side view of the present invention;

[0022] Figure 4 yes Figure 3 Plane section view along AA direction;

[0023] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0024] Figure 6 yes Figure 4 A partial enlarged view of point C in the middle;

[0025] Figure 7 It is the local stereoscopic Figure 2 ;

[0026] Figure 8 It is the local stereoscopic Figure 3 ;

[0027] Fig. 9 It is a three-dimensional diagram of the upper cover plate and the lining inner frame of the present invention;

[0028] Fig.10 It is a three-dimensional view of the inner skeleton of the bushing in the present invention.

[0029] The reference numerals in the above figures are as follows:

[0030] 1 - upper cover plate; 11 - columnar sunk groove; 12 - extrusion hole; 13 - deformation strip; 14 - positioning hole;

[0031] 2 - inner skeleton of the bushing; 21 - socket; 22 - right trapezoidal groove; 23 - right triangular groove;

[0032] 3 - workbench; 31 - L-shaped mounting plate; 32 - hydraulic rod; 33 - horizontal plate; 34 - circular groove; 35 - fixing groove; 36 - fixing screw rod; 37 - second bevel gear;

[0033] 4 - press-fitting mechanism; 41 - press plate; 411 - connecting rod; 412 - limiting disc; 42 - buffer spring; 43 - rectangular block; 431 - magnetic positioning pin; 44 - extrusion column; 45 - mounting hole; 451 - positioning groove; 452 - horizontal strip; 4521 - positioning rod; 4522 - abutting disc; 4523 - return spring; 4524 - top block; 453 - vertical rack; 46 - horizontal disc; 461 - sliding groove; 462 - positioning block; 463 - contact rod; 464 - rectangular avoidance groove; 465 - C-shaped plate; 466 - telescopic rod; 467 - horizontal rack;

[0034] 5 - guiding deformation mechanism; 51 - moving block; 52 - triangular pressing block; 521 - transverse groove; 522 - transverse strip; 5221 - tooth groove; 523 - rectangular groove; 524 - synchronous gear; 525 - receiving groove; 53 - bidirectional lead screw; 531 - driving gear;

[0035] 6 - positioning mechanism; 61 - fixed motor; 611 - first bevel gear; 62 - fixed strip. Detailed implementation manners

[0036] In order to enable those skilled in the art of the present technology to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] See Figures 1 to 10As shown, a press-fitting tool for improving the pull-out force of the subframe bushing cover plate comprises an upper cover plate 1 and a bushing inner frame 2; a columnar sink 11 is protruding outward from the center of the upper cover plate 1, an extrusion hole 12 is arranged at the center of the bottom of the columnar sink 11, and a deformation strip 13 is arranged on the inner wall of the extrusion hole 12 in a mirror image; the bushing inner frame 2 is cylindrical, and a plug hole 21 for accommodating the columnar sink 11 is arranged at the center of the bushing inner frame 2, and two right-angle trapezoidal grooves 22 for accommodating the corresponding deformation strips 13 are arranged on the inner wall of the plug hole 21 in a mirror image; it also comprises a workbench 3, a press-fitting tool 4, a press-fitting tool 5, a press-fitting tool 6, a press-fitting tool 7, a press-fitting tool 8, a press-fitting tool 9, a press-fitting tool 10, a press-fitting tool 11, a press-fitting tool 11, a press-fitting tool 12, a press-fitting tool 13 ...2, a press-fitting tool 13, a press-fitting tool 11, a press-fitting tool 12, a press-fitting tool 13, a press-fitting tool 11, a press-fitting tool 12, a press-fitting tool 12, a Mechanism 4 and guiding deformation mechanism 5; an L-shaped mounting plate 31 is arranged on one side of the workbench 3, and a hydraulic rod 32 is arranged at one end of the L-shaped mounting plate 31 away from the workbench 3, and the hydraulic rod 32 is arranged in a vertical state, and the actuator of the hydraulic rod 32 passes through the L-shaped mounting plate 31 and is provided with a horizontal plate 33, and the pressing mechanism 4 is arranged on the horizontal plate 33 and is used to press the columnar sink 11 of the upper cover plate 1 into the extrusion hole 12; the pressing mechanism 4 includes a pressing plate 41 and a buffer spring 42; the pressing plate 41 is arranged in a horizontal state below the horizontal plate 33, and the pressing plate 41 Four connecting rods 411 are arranged in a rectangular distribution on the top, each connecting rod 411 passes through the horizontal plate 33 and is provided with a limit plate 412, and each connecting rod 411 is sleeved with a buffer spring 42; a rectangular block 43 is arranged at the bottom of the pressing plate 41, and an extrusion column 44 cooperating with the columnar sink 11 is arranged at the center of the rectangular block 43; a mounting hole 45 extending downward and passing through the rectangular block 43 and the extrusion column 44 is arranged at the center of the pressing plate 41, and a horizontal plate 46 is slidably arranged in the mounting hole 45, and the horizontal plate 46 can move with the horizontal plate 33 It moves back and forth along the axis of the mounting hole 45; the guiding deformation mechanism 5 is arranged on the horizontal plate 46 and can move with the movement of the horizontal plate 46, so that the corresponding deformation strip 13 is deformed and fits with the inclined surface of the corresponding right-angle trapezoidal groove 22; a sliding groove 461 is arranged at the center of the bottom of the horizontal plate 46, and the guiding deformation mechanism 5 includes two moving blocks 51 slidably arranged in the sliding groove 461, and the two moving blocks 51 can move closer to or away from each other as the horizontal plate 46 moves, and a triangular pressing block 52 is arranged at one end of each moving block 51 away from the corresponding sliding groove 461.

[0038] The staff places the bushing inner skeleton 2 on the workbench 3 and places it directly under the horizontal plate 33. Then, the upper cover plate 1 is placed above the bushing inner skeleton 2 and the hydraulic rod 32 is adjusted so that the hydraulic rod 32 can drive the horizontal plate 33 to move toward the bushing inner skeleton 2. The extrusion column 44 arranged on the horizontal plate 33 can be inserted into the columnar sink groove 11 of the upper cover plate 1, thereby adjusting the position of the upper cover plate 1, so that the pressing plate 41 can contact the upper cover plate 1, and the columnar sink groove 11 on the upper cover plate 1 can be inserted into the socket 21 of the bushing inner skeleton 2. Then, through the continuous downward pressure of the hydraulic rod 32, the distance between the horizontal plate 33 and the pressing plate 41 is continuously reduced, thereby squeezing the buffer spring 42. The force on the horizontal plate 33 is gradually applied to the pressing plate 41 through the buffer spring 42, and the rectangular block 43 arranged on the horizontal plate 33 can apply downward pressure to the upper cover plate 1 in multiple directions to ensure uniform force, thereby A large load pre-stress is achieved on the upper cover plate 1, so that the columnar sink 11 is pressed into the insertion hole 21 of the bushing inner frame 2 by interference, and the columnar sink 11 is hard squeezed out of the insertion hole 21 to increase the pull-out force of the upper cover plate 1 from the bushing inner frame 2; and with the movement of the horizontal plate 33, the horizontal plate 46 can move along the axis of the mounting hole 45 so that the two moving blocks 51 arranged on the horizontal plate 46 can move away from each other while descending, and the triangular pressing block 52 arranged on the moving block 51 can contact the corresponding deformation strip 13 along an arc trajectory, so that the deformation strip 13 can be bent preferentially from the end and gradually pressed down and bent along the length direction, thereby avoiding brittle fracture of the deformation strip 13; the deformation strip 13 is deformed, thereby fitting with the inclined surface of the corresponding right-angle trapezoidal groove 22, which can make the connection between the upper cover plate 1 and the bushing inner frame 2 more stable, further improve the pull-out force of the upper cover plate 1 from the bushing inner frame 2, and avoid the upper cover plate 1 and the bushing inner frame 2 falling off.

[0039] See also Figure 2 , Figure 7 and Figure 8 As shown, the inner wall of the mounting hole 45 is mirror-imaged with two positioning grooves 451, and the outer wall of the horizontal plate 46 is mirror-imaged with two positioning blocks 462 that cooperate with the positioning grooves 451. The positioning blocks 462 are slidably arranged in the corresponding positioning grooves 451. A horizontal bar 452 is also arranged in the mounting hole 45, and both ends of the horizontal bar 452 are respectively arranged at the ends of the corresponding positioning grooves 451. Both ends of the horizontal bar 452 are provided with positioning rods 4521 extending toward the horizontal plate 46. The positioning rods 4521 pass through the corresponding positioning blocks 462 and are provided with a contact plate 4522. The positioning rods 4521 are located in the corresponding positioning grooves 451. A reset spring 4523 is sleeved on each positioning rod 4521, and the reset spring 4523 is located between the corresponding positioning block 462 and the horizontal bar 452; two contact rods 463 are mirror-imaged at the top edge of the horizontal plate 46.

[0040] By providing the positioning groove 451 and the positioning block 462, it can be ensured that when the press-fitting is not performed, the horizontal plate 46 contacts the abutting plate 4522 on the positioning rod 4521 under the elastic force of the return spring 4523, so that the two triangular lower pressing blocks 52 can be retracted into the corresponding mounting holes 45 to avoid volume collision with the upper cover plate 1; when the press-fitting is performed, with the driving of the hydraulic rod 32, the pressing plate 41 contacts the upper cover plate 1, at this time, the horizontal plate 33 can move toward the direction close to the pressing plate 41 with the continued driving of the hydraulic rod 32, and in this process, the horizontal plate 33 can contact the top of the horizontal plate 46 The rod 463 contacts, so that the horizontal disk 46 can overcome the elastic force of the corresponding reset spring 4523 and move synchronously with the horizontal plate 33, so that the two triangular pressing blocks 52 arranged on the horizontal disk 46 can contact the corresponding deformation strips 13, so that the deformation strips 13 can fit with the corresponding right-angled trapezoidal grooves 22 inclined surfaces, so that the upper cover plate 1 and the bushing inner skeleton 2 can be more secure. After the pressing is completed, the hydraulic rod 32 is driven to separate the pressing plate 41 from the upper cover plate 1. At this time, under the elastic force of the buffer spring 42 and the reset spring 4523, the horizontal plate 33 and the horizontal disk 46 can be quickly reset, thereby facilitating the next pressing operation.

[0041] See also Figures 5 to 8 As shown, the guide deformation mechanism 5 also includes a bidirectional screw rod 53; the bidirectional screw rod 53 is rotatably arranged in the sliding groove 461, and the two ends of the bidirectional screw rod 53 are respectively threadedly connected with the corresponding moving block 51, and a driving gear 531 is also arranged at the center of the double-line screw rod, and a rectangular avoidance groove 464 for avoiding the driving gear 531 is arranged at the center of the horizontal disk 46, and the rectangular avoidance groove 464 and the sliding groove 461 are arranged in a cross shape; a vertical rack 453 is arranged on the horizontal bar 452, and the vertical rack 453 extends upward and is arranged in the rectangular avoidance groove 464 and meshes with the driving gear 531.

[0042] By arranging a vertical rack 453 on the horizontal bar 452, the vertical rack 453 is meshed with the driving gear 531 through the rectangular avoidance groove 464. As the horizontal plate 46 moves, the driving gear 531 at the center of the bidirectional screw rod 53 can move along the length direction of the vertical rack 453, so that the bidirectional screw rod 53 can rotate. As the bidirectional screw rod 53 rotates, the two moving blocks 51 threadedly connected with the bidirectional screw rod 53 can move away from each other synchronously, so that the triangular pressing block 52 arranged on the moving block 51 can contact the deformation bar 13 on the upper cover plate 1 along the arc-shaped moving trajectory, thereby completing the secondary reinforcement of the upper cover plate 1.

[0043] See also Figures 5 to 8As shown, on one side of each right trapezoidal groove 22 away from the mounting hole 45, there is a right triangular groove 23. On one side of each triangular pressing block 52 away from the moving block 51, there is a transverse groove 521. A transverse bar 522 is slidably arranged in each transverse groove 521. At the center of the bottom inner wall of each transverse groove 521, there is a rectangular groove 523. A synchronous gear 524 is rotatably arranged in each rectangular groove 523. On one side of each transverse bar 522 close to the corresponding rectangular groove 523, a plurality of tooth grooves 5221 are arranged along the length direction. The synchronous gear 524 meshes with the tooth grooves 5221 on the corresponding transverse bar 522. At the center of the bottom of the horizontal disk 46, there is a C-shaped plate 465. At the center of the C-shaped plate 465, there is a telescopic rod 466. One end of the telescopic rod 466 away from the C-shaped plate 465 passes through the horizontal bar 452 and is provided with a transverse rack 467. Each triangular pressing block 52 is provided with a receiving groove 525 for receiving the transverse rack 467. The receiving groove 525 communicates with the corresponding rectangular groove 523. Both ends of the transverse rack 467 respectively mesh with the corresponding synchronous gears 524.

[0044] In order to further improve the connection strength and pulling-out force between the upper cover plate 1 and the inner skeleton 2 of the bushing, by arranging a right triangular groove 23 on one side of the triangular pressing block 52 away from the moving block 51, as the horizontal disk 46 moves, the two triangular pressing blocks 52 can move away from each other. By arranging the telescopic rod 466, the position of the transverse rack 467 can be fixed, so that it can always mesh with the two synchronous gears 524. During the moving-away process, the transverse rack 467 can drive the synchronous gear 524 to rotate. The synchronous gear 524 meshes with the tooth grooves 5221 on the transverse bar 522, thereby driving the corresponding transverse bar 522 to move towards the direction close to the corresponding right triangular groove 23, so that the end of the deformation bar 13 can be deformed for the second time, and an obtuse angle is formed at the contact position between the deformation bar 13 and the right trapezoidal groove 22 and the right triangular groove 23, thereby further improving the pulling-out force of the upper cover plate 1 and preventing the upper cover plate 1 from falling off.

[0045] See Figure 7 As shown, both ends of each transverse bar 522 are set to be rounded corners.

[0046] By setting both ends of the transverse bar 522 to be rounded corners, after the triangular pressing block 52 contacts the corresponding deformation bar 13, the deformation bar 13 can be deformed more gently, which can not only prevent the deformation bar 13 from brittle fracture, but also improve the service life of the transverse bar 522.

[0047] See Figure 2 and Fig. 9 As shown, two magnetic positioning pins 431 are mirror-symmetrically arranged on the rectangular block 43, and two positioning holes 14 for receiving the magnetic positioning pins 431 are arranged on the upper cover plate 1.

[0048] By providing a magnetic positioning pin, the magnetic positioning pin 431 on the rectangular block 43 can extend into the positioning hole 14 of the upper cover plate 1 for magnetic adsorption, thereby further positioning the upper cover plate 1 to avoid displacement of the upper cover plate 1 during press-fitting, thereby causing damage.

[0049] See also Figure 7 As shown, two top blocks 4524 are also provided on the horizontal bar 452 .

[0050] By providing two top blocks 4524 , the moving distance of the horizontal plate 46 can be limited, which can not only avoid the volume collision between the triangular pressing block 52 and the inner wall of the mounting hole 45 , but also ensure the deformation degree of the deformation strip 13 .

[0051] See also Figure 1 , Figure 4 and Figure 6 As shown, the workbench 3 is also provided with a positioning mechanism 6 for fixing the inner frame 2 of the bushing; the positioning mechanism 6 includes a fixing motor 61 and a fixing bar 62; a circular groove 34 is provided at the center of the workbench 3, and the fixing motor 61 is vertically arranged at the bottom of the workbench 3, the output shaft of the fixing motor 61 passes through the workbench 3 and extends into the circular groove 34 and is provided with a first bevel gear 611, a plurality of fixing grooves 35 are provided on the top of the workbench 3 along the axial direction of the circular groove 34, there are a plurality of fixing bars 62, and the fixing bars 62 are slidably arranged in the corresponding fixing grooves 35, and a fixing screw 36 is rotatably arranged in each fixing groove 35, and the fixing screw 36 is threadedly connected to the corresponding fixing bar 62, and one end of each fixing screw 36 close to the circular groove 34 extends into the circular groove 34 and is provided with a second bevel gear 37, and the first bevel gears 611 are respectively meshed with the corresponding second bevel gears 37.

[0052] The first bevel gear 611 is driven to rotate by the fixed motor 61, and the first bevel gear 611 drives multiple fixed screws 36 to rotate synchronously through the second bevel gear 37, so that multiple fixed bars 62 can move synchronously toward the direction close to the circular groove 34, thereby fixing the inner skeleton 2 of the bushing, ensuring its stability during the press-fitting process and improving the press-fitting effect.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A press-fitting tool for improving the pull-out force of a subframe bushing cover, comprising an upper cover and a bushing inner frame; a columnar sink groove is protruding outward from the center of the upper cover, an extrusion hole is provided at the center of the bottom of the columnar sink groove, and a deformation strip is mirrored on the inner wall of the extrusion hole; the bushing inner frame is cylindrical, and a plug hole for accommodating the columnar sink groove is provided at the center of the bushing inner frame, and two right-angle trapezoidal grooves for accommodating corresponding deformation strips are mirrored on the inner wall of the plug hole; characterized in that, It also includes a workbench, a press-fitting mechanism and a guiding deformation mechanism; An L-shaped mounting plate is provided on one side of the workbench, and a hydraulic rod is provided at one end of the L-shaped mounting plate away from the workbench. The hydraulic rod is provided in a vertical state, and an actuator of the hydraulic rod passes through the L-shaped mounting plate and is provided with a horizontal plate. The pressing mechanism is provided on the horizontal plate and is used to press the columnar sink groove of the upper cover plate into the extrusion hole; The pressing mechanism includes a pressing plate and a buffer spring; the pressing plate is arranged in a horizontal state below the horizontal plate, and four connecting rods are arranged in a rectangular distribution on the top of the pressing plate, each connecting rod passes through the horizontal plate and is provided with a limit plate, and each connecting rod is sleeved with a buffer spring; a rectangular block is arranged at the bottom of the pressing plate, and an extrusion column matching with the columnar sink is arranged at the center of the rectangular block; A mounting hole extending downward and penetrating the rectangular block and the extrusion column is provided at the center of the pressing plate, and a horizontal plate is slidably provided in the mounting hole. The horizontal plate can move back and forth along the axis of the mounting hole as the horizontal plate moves; the guide deformation mechanism is provided on the horizontal plate and can deform the corresponding deformation strip and fit with the inclined surface of the corresponding right-angle trapezoidal groove as the horizontal plate moves; A sliding groove is arranged at the center of the bottom of the horizontal plate, and the guiding deformation mechanism includes two moving blocks slidably arranged in the sliding groove. The two moving blocks can move closer to or farther away from each other as the horizontal plate moves, and a triangular pressing block is arranged at one end of each moving block away from the corresponding sliding groove; Two positioning grooves are mirrored on the inner wall of the mounting hole, and two positioning blocks cooperating with the positioning grooves are mirrored on the outer wall of the horizontal plate. The positioning blocks are slidably arranged in the corresponding positioning grooves. A horizontal bar is also arranged in the mounting hole, and both ends of the horizontal bar are respectively arranged at the ends of the corresponding positioning grooves. Positioning rods extending toward the horizontal plate are arranged at both ends of the horizontal bar. The positioning rods pass through the corresponding positioning blocks and are provided with a contact plate. The positioning rods are located in the corresponding positioning grooves. A reset spring is sleeved on each positioning rod, and the reset spring is located between the corresponding positioning block and the horizontal bar; two contact rods are mirrored at the top edge of the horizontal plate.

2. A press-fitting tool for improving the pull-out force of a subframe bushing cover according to claim 1, characterized in that: The guide deformation mechanism also includes a bidirectional screw rod; The bidirectional screw rod is rotatably arranged in the sliding groove, and the two ends of the bidirectional screw rod are respectively threadedly connected with the corresponding moving blocks. A driving gear is also arranged at the center of the double-line screw rod, and a rectangular avoidance groove for avoiding the driving gear is arranged at the center of the horizontal disk. The rectangular avoidance groove and the sliding groove are arranged in a cross shape; a vertical rack is arranged on the horizontal bar, and the vertical rack extends upward and is arranged in the rectangular avoidance groove and meshes with the driving gear.

3. A press-fitting tool for improving the pull-out force of a subframe bushing cover according to claim 2, characterized in that: On one side of each right trapezoidal groove away from the mounting hole, there is a right triangular groove. On one side of each triangular pressing block away from the moving block, there is a transverse groove. A transverse bar is slidably arranged in each transverse groove. At the center of the inner wall of the bottom of each transverse groove, there is a rectangular groove. A synchronous gear is rotatably arranged in each rectangular groove. Along the length direction on one side of each transverse bar close to the corresponding rectangular groove, there are a plurality of tooth grooves. The synchronous gear meshes with the tooth grooves on the corresponding transverse bar. At the center of the bottom of the horizontal disk, there is a U-shaped plate. At the center of the U-shaped plate, there is a telescopic rod. The end of the telescopic rod away from the U-shaped plate passes through the horizontal bar and is provided with a transverse rack. Each triangular pressing block is provided with a receiving groove for receiving the transverse rack. The receiving groove communicates with the corresponding rectangular groove. The two ends of the transverse rack are respectively meshed with the corresponding synchronous gears.

4. A press-fitting tool for improving the pull-out force of a subframe bushing cover according to claim 3, characterized in that: Both ends of each transverse bar are set to be rounded.

5. The press-fitting tool for improving the pull-out force of the subframe bushing cover according to claim 1, characterized in that: Two magnetic positioning pins are mirror-symmetrically arranged on the rectangular block, and two positioning holes for receiving the magnetic positioning pins are arranged on the upper cover plate.

6. A press-fitting tool for improving the pull-out force of a subframe bushing cover according to claim 2, characterized in that: Two top blocks are also arranged on the horizontal bar.

7. The press-fitting tool for improving the pull-out force of the subframe bushing cover according to claim 1, characterized in that: A positioning mechanism for fixing the inner skeleton of the bushing is also arranged on the workbench.

8. The press-fitting tool for improving the pull-out force of the subframe bushing cover according to claim 7, characterized in that: The positioning mechanism includes a fixed motor and a fixed bar; A circular groove is arranged at the center of the workbench. The fixed motor is vertically arranged at the bottom of the workbench. The output shaft of the fixed motor passes through the workbench and extends into the circular groove and is provided with a first bevel gear. A plurality of fixed grooves are arranged on the top of the workbench along the axis direction of the circular groove. There are a plurality of fixed bars. The fixed bars are slidably arranged in the corresponding fixed grooves. A fixed lead screw is rotatably arranged in each fixed groove. The fixed lead screw is threadedly connected with the corresponding fixed bar. One end of each fixed lead screw close to the circular groove extends into the circular groove and is provided with a second bevel gear. The first bevel gear meshes with the corresponding second bevel gear respectively.

Images