Automobile swing arm forging clamp

Abstract

The automobile swing arm forging clamp comprises a base, a clamping assembly and a driver, the clamping assembly comprises a lifting pressing plate, a pair of side pressing units and a pair of linkage units, each side pressing unit is provided with a rotatable pressing head and a separation spring, and each linkage unit is provided with a lifting rod, a retaining rod and a limiting groove; a power connecting piece composed of a transmission plate, a transmission wedge block and the like is matched, when the lifting pressing plate descends, the linkage unit synchronously drives the side pressing units to move in the opposite direction, and multi-direction synchronous clamping of the blank is achieved; the clamp has the advantages that the operation is simple and convenient, the clamping is stable, the transmission is smooth, the forging precision is effectively improved, and the equipment manufacturing cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of forging clamping technology, and specifically to a forging clamp for an automotive swing arm. Background Technology

[0002] The control arm is a core connecting component of the automotive chassis suspension system. Control arm blanks prepared using forging technology have significant advantages in toughness and rigidity. During the forging process, special fixtures are required to stably hold the blank and adjust its position to ensure the precision of continuous forging in multiple processes.

[0003] The utility model patent with publication number CN218855519U discloses an automotive swing arm forging fixture. The fixture clamps the billet through a pressure plate assembly and uses a transmission structure of rack, pinion, and pawl to drive the movable table to move in conjunction with a threaded rod, thereby realizing the functions of billet clamping and displacement.

[0004] However, the existing technology still has obvious shortcomings: the clamping structure requires multiple sets of guide rods, springs and locking parts to cooperate, which makes the operation cumbersome and inefficient; the clamping fit is poor and cannot adapt to the blank contour; the gear and pawl transmission is prone to jamming and lacks effective anti-backward limit; the power drive structure is complex and the equipment cost is high.

[0005] Therefore, there is an urgent need to develop a simple, stable, fast-responding, and well-protected automotive swing arm forging fixture to solve the above problems. Summary of the Invention

[0006] The present invention aims to solve the technical problems existing in the prior art.

[0007] This application provides an automotive swing arm forging fixture, including a base, a clamping assembly, and a driver. The clamping assembly includes a lifting pressure plate, a pair of side pressure units, and a pair of linkage units. The lifting pressure plate is connected to the driver via a power connector. The pair of side pressure units are symmetrically arranged and are slidably mounted on the top surface of the base via side sliding grooves. Each side pressure unit is connected to the lifting pressure plate via a linkage unit. When the lifting pressure plate moves toward the base, the pair of side pressure units move toward each other synchronously.

[0008] Furthermore, the lifting plate includes a lifting plate body, a notch, a sliding plate, and a push-pull swing arm. The lifting plate body is floating above the base via a power connector. The notch is opened at the front end of the lifting plate body. The sliding plate is slidably fitted to the bottom of the lifting plate body via a lower groove. One end of the push-pull swing arm is hinged to the top surface of the base away from the notch, and the other end is connected to the end of the sliding plate away from the notch via an elastic connector. The end of the lower groove away from the push-pull swing arm is a closed end.

[0009] Furthermore, the elastic connector includes a mounting groove, a connecting rod, and a crossbar. The mounting groove is opened on the sliding plate, the crossbar is slidably installed in the mounting groove and a return spring is provided between it and the front end of the mounting groove. One end of the connecting rod is fixed to the crossbar, and the other end extends out of the mounting groove and is hinged to the end of the push-pull swing arm away from the base.

[0010] Furthermore, both the side sliding groove and the lower sliding groove are larger on the inside and smaller on the outside, and the side contours of the side pressure unit and the sliding plate are adapted to the side sliding groove and the lower sliding groove, respectively.

[0011] Furthermore, the side pressure unit includes a pressure block, a pair of pressure heads, and a release spring. The pressure block is slidably installed in the side sliding groove, the release spring is located at the inner end of the pressure block, and the pair of pressure heads are rotatably installed at the inner end of the top of the pressure block through circular grooves. The exposed part of the pressure head is provided with a pressing surface.

[0012] Furthermore, the linkage unit includes a lifting rod, a stop rod, and a pushing groove. The lifting rod is fixed to the bottom surface of the lifting pressure plate, and its lower inner side is inclined. The stop rod is fixed to the outer side of the bottom of the lifting rod, and its lower inner side is inclined. The middle of the inner wall of the pushing groove is provided with an upward pushing slope. The pushing slope cooperates with the lower inclined surfaces of the lifting rod and the stop rod to convert the downward force of the lifting rod and the stop rod into the driving force for the lateral movement of the side pressure unit.

[0013] Furthermore, the linkage unit is also equipped with a limiting groove, which is opened at the outer end of the side pressure unit. When the side of the lifting rod contacts the lower part of the inner wall of the pushing groove, the limiting groove cooperates with the lower end of the anti-reverse rod.

[0014] Furthermore, the power connection includes a transmission plate, a transmission wedge, several transmission shafts, and several lifting springs. Each transmission shaft is slidably installed in the base, and its lower end is connected to the transmission plate and the lifting pressure plate, respectively. The lifting spring is sleeved on the outside of the transmission shaft, and its upper end abuts against the bottom surface of the lifting pressure plate and the top surface of the base, respectively. The driver is used to cooperate with the transmission wedge to control the lifting of the transmission plate, the lifting plate, and each transmission shaft.

[0015] Furthermore, the actuator includes a linear cylinder and a push-pull plate. The linear cylinder is fixed to the bottom surface of the base and is used to drive the push-pull plate to slide between the transmission plate and the base. The push-pull plate is fixed to the outer end of the piston rod of the linear cylinder and is inclined toward the bottom surface of one end of the transmission wedge to push the transmission wedge to rise and fall.

[0016] Furthermore, the base has several support plates on its bottom surface, so that when the transmission plate is lowered to its lowest position, the bottom surface of the transmission plate is still higher than the bottom surface of the support plates.

[0017] The beneficial effects of this invention are as follows: 1. This application adopts an integrated clamping structure comprising a lifting pressure plate, a pair of side pressure units and a pair of linkage units. By using the principle that the lifting pressure plate moves in opposite directions synchronously through the linkage units when it descends, the clamping operation steps are simplified and the clamping efficiency is greatly improved. 2. This application adopts a technical solution including a rotatable pressure head with a side pressure unit, a lifting pressure plate, a sliding plate, and an elastic connector. It achieves the beneficial effect of tightly fitting the clamping structure with the outline of the blank and improving the positioning stability by adaptively adjusting the pressing angle after the pressure head contacts the blank and the sliding plate opening and closing the notch through the cooperation of the elastic component. 3. This application adopts a technical solution that includes a linkage unit lifting rod, a stop rod, a pushing inclined surface and a limiting groove. It achieves the beneficial effects of fast transmission response without jamming and no back movement of the side pressure unit by converting the downward force of the lifting rod into the lateral driving force of the side pressure unit and the stop rod and the limiting groove cooperating to form a stop and limit. 4. This application adopts a technical solution including a transmission plate, transmission wedge, transmission shaft, lifting spring and linear cylinder push-pull plate, which realizes the smooth lifting and resetting of the lifting pressure plate with a set of power source without the need for additional mobile drive components. This achieves the beneficial effects of simplifying the power transmission structure and reducing the manufacturing and maintenance costs of the equipment. This effect overcomes the defects of complex power drive structure and high equipment cost in the background technology. Attached Figure Description

[0018] Figure 1 This is a perspective view of the automotive swing arm forging fixture in the embodiments of this application; Figure 2 This is a perspective view of the automotive swing arm forging fixture in the embodiments of this application; Figure 3 This is a perspective view of the base in an embodiment of this application; Figure 4 This is a perspective view of the lifting pressure plate, power connection component, and driver assembly in the embodiments of this application; Figure 5 This is a perspective view of the lifting pressure plate, power connection component, and driver assembly in the embodiments of this application; Figure 6 This is a perspective view of the lifting pressure plate in the embodiment of this application; Figure 7 This is a perspective view of the side pressure unit in an embodiment of this application; Figure 8 This is a perspective view of the elastic connector and the swing arm in an embodiment of this application.

[0019] Figure Labels 1-Base, 2-Clamping assembly, 3-Driver, 31-Linear cylinder, 32-Push-pull plate, 33-Support plate, 4-Lifting pressure plate, 41-Lifting plate body, 42-Groove, 43-Sliding plate, 44-Push-pull swing arm, 45-Slide groove, 5-Side pressure unit, 51-Pressure block, 52-Pressure head, 53-Release spring, 54-Circular groove, 55-Pressing surface, 6-Linkage unit, 61-Lifting rod, 62-Anti-reverse rod, 63-Pushing groove, 64-Pushing inclined surface, 65-Limiting groove, 7-Power connector, 71-Transmission plate, 72-Transmission wedge, 73-Transmission shaft, 74-Lifting spring, 8-Side sliding groove, 9-Elastic connector, 91-Mounting groove, 92-Connecting rod, 93-Crossbar, 94-Reset spring. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0021] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0022] The automotive swing arm forging fixture provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0023] Example 1 This application provides an automotive swing arm forging fixture, including a base 1, a clamping assembly 2, and a driver 3. The clamping assembly 2 includes a lifting pressure plate 4, a pair of side pressure units 5, and a pair of linkage units 6. The lifting pressure plate 4 is connected to the driver 3 via a power connector 7. The pair of side pressure units 5 are symmetrically arranged and are slidably mounted on the top surface of the base 1 via side sliding grooves 8. Each side pressure unit 5 is connected to the lifting pressure plate 4 via a linkage unit 6. When the lifting pressure plate 4 moves toward the base 1, the pair of side pressure units 5 move toward each other synchronously.

[0024] During actual clamping operations, the automobile swing arm blank to be processed is placed at the clamping position on the top surface of the base 1. Then, the driver 3 is started, and the lifting pressure plate 4 is driven to move downward and gradually approach the automobile swing arm blank through the power connector 7. During the descent of the lifting pressure plate 4, through the transmission action of a pair of linkage units 6, a pair of side pressure units 5 are synchronously driven to slide towards each other along the side sliding groove 8 on the base 1 and approach the automobile swing arm blank until the lower end of the automobile swing arm blank abuts against the top surface of the base 1, the upper end abuts against the bottom surface of the lifting pressure plate 4, and the two sides abut against the clamping surfaces of the pair of side pressure units 5 respectively, so as to realize the multi-directional clamping and positioning of the automobile swing arm blank from top to bottom and left to right, and complete the blank fixing operation.

[0025] Example 2 In this embodiment, in addition to the structural features of the aforementioned embodiments, the lifting plate 4 includes a lifting plate body 41, a notch 42, a sliding plate 43, and a push-pull swing arm 44. The lifting plate body 41 is floating above the base 1 via the power connector 7. The notch 42 is formed at the front end of the lifting plate body 41. The sliding plate 43 is slidably engaged with the bottom of the lifting plate body 41 via a sliding groove 45. One end of the push-pull swing arm 44 is hinged to the top surface of the base 1 away from the notch 42, and the other end is connected to the end of the sliding plate 43 away from the notch 42 via an elastic connector 9. The end of the sliding groove 45 away from the push-pull swing arm 44 is a closed end.

[0026] In this embodiment of the application, the elastic connector 9 includes a mounting groove 91, a connecting rod 92 and a crossbar 93. The mounting groove 91 is formed on the sliding plate 43. The crossbar 93 is slidably installed in the mounting groove 91 and a return spring 94 is provided between it and the front end of the mounting groove 91. One end of the connecting rod 92 is fixedly connected to the crossbar 93, and the other end extends out of the mounting groove 91 and is hinged to the end of the push-pull swing arm 44 away from the base 1.

[0027] In this embodiment of the application, both the side sliding groove 8 and the lower sliding groove 45 are larger on the inside and smaller on the outside, and the side contours of the side pressing unit 5 and the sliding plate 43 are respectively adapted to the side sliding groove 8 and the lower sliding groove 45.

[0028] like Figures 4 to 6 , Figure 8As shown, due to the above structure, when actually clamping and positioning the automobile swing arm blank, the end of the automobile swing arm blank to be clamped is first inserted through the notch 42 and placed in the clamping position on the top surface of the base 1; then, the driver 3, in conjunction with the power connector 7, drives the lifting plate 41 to move downward. At this time, the two ends of the push-pull swing arm 44 swing around their hinge points with the base 1 and the connecting rod 92, and simultaneously push the sliding plate 43 to slide along the lower groove 45 towards its closed end, until the sliding plate 43 abuts against the closed end of the lower groove 45, thus achieving the clamping of the notch. The complete closure of the slot 42 prevents the billet from coming out of the slot 42; then the lifting plate 41 continues to move downward, the push-pull swing arm 44 maintains the swing tendency and pushes the crossbar 93 and the connecting rod 92 together to move towards the inner end of the mounting slot 91. The return spring 94 in the mounting slot 91 is compressed to generate elastic deformation and store elastic potential energy. While maintaining the closed state of the slot 42, the sliding plate 43 moves downward synchronously with the lifting plate 41 until its bottom surface is tightly abutted against the upper side of the end of the billet to be clamped by the automobile swing arm, thus completing the upper side positioning of the billet.

[0029] When it is necessary to release the car swing arm blank, the driver 3 drives the lifting plate 41 to move upward through the power connector 7. At this time, the compressed return spring 94 in the mounting groove 91 releases its elastic potential energy, pushing the crossbar 93 and the connecting rod 92 to move to the outer end of the mounting groove 91. As the lifting plate 41 continues to rise, it drives the two ends of the push-pull swing arm 44 to swing in the opposite direction around the corresponding hinge point. The push-pull swing arm 44 simultaneously pulls the sliding plate 43 to move back along the sliding groove 45 away from the closed end. The notch 42 gradually opens as the sliding plate 43 moves back. The lifting plate 41 continues to rise until the sliding plate 43 returns to the initial position and the lifting plate 41 rises to the preset height. At this time, the end of the car swing arm blank to be clamped is released from the upper abutment limit and can be smoothly taken out through the opened notch 42, completing the blank release operation.

[0030] Example 3 In this embodiment, in addition to the structural features of the aforementioned embodiments, the side pressing unit 5 includes a pressing block 51, a pair of pressing heads 52 and a release spring 53. The pressing block 51 is slidably installed in the side sliding groove 8. The release spring 53 is disposed at the inner end of the pressing block 51. The pair of pressing heads 52 are respectively rotatably installed at the inner top of the pressing block 51 through the circular groove 54. The exposed part of the pressing head 52 is provided with a pressing surface 55.

[0031] like Figure 3 and Figure 7As shown, due to the aforementioned structure, when the lifting pressure plate 4 descends and drives the side pressure unit 5 to move laterally along the side sliding groove 8 towards the automobile swing arm blank, the pressure head 52 of the side pressure unit 5 first contacts the side of the blank through the pressing surface 55. Because the pressure head 52 can rotate around the circular groove 54, it can adaptively adjust the pressing angle according to the outer contour of the blank after contact, so that the pressing surface 55 fits tightly with the side of the blank, improving the clamping fit and stability; at the same time, the release spring 53 at the inner end of the pressure block 51 forms an elastic buffer, avoiding rigid contact during the lateral movement of the side pressure unit 5 that could damage the surface of the blank. When clamping is complete and the blank needs to be released, the side pressure unit 5 moves back along the side sliding groove 8, the clamping force of the blank on the pressure head 52 disappears, and under its own weight and the slight reset force of the release spring 53, the pressure head 52 rotates back to the initial position, completing the reset of the side pressure unit 5.

[0032] Example 4 In this embodiment, in addition to the structural features of the aforementioned embodiments, the linkage unit 6 includes a lifting rod 61, a stop rod 62, and a pushing groove 63. The lifting rod 61 is fixed to the bottom surface of the lifting pressure plate 4, and its lower inner side is inclined. The stop rod 62 is fixed to the outer bottom of the lifting rod 61, and its lower inner side is inclined. The middle of the inner wall of the pushing groove 63 is provided with an upward pushing slope 64. The pushing slope 64 cooperates with the lower inclined surfaces of the lifting rod 61 and the stop rod 62 to convert the downward force of the lifting rod 61 and the stop rod 62 into a driving force to drive the side pressure unit 5 to move laterally.

[0033] In this embodiment of the application, the linkage unit 6 is further provided with a limiting groove 65. The limiting groove 65 is opened at the outer end of the side pressure unit 5. When the side of the lifting rod 61 contacts the lower part of the inner side wall of the pushing groove 63, the limiting groove 65 cooperates with the lower end of the anti-reverse rod 62.

[0034] like Figures 3 to 7As shown, due to the above structure, when the lifting pressure plate 4 moves downward, it simultaneously drives the lifting rod 61 and the anti-reverse rod 62 fixed to its bottom surface to descend together. The inclined surfaces at the lower ends of the two first contact and cooperate with the pushing inclined surface 64 on the side pressure unit 5, converting the vertical downward force of the lifting pressure plate 4 into a horizontal driving force that drives the side pressure unit 5 to move laterally along the side sliding groove 8, causing the side pressure unit 5 to continuously approach the automobile swing arm blank. As the lifting pressure plate 4 continues to descend, the side of the lifting rod 61 gradually contacts the lower part of the inner wall of the pushing groove 63. At this time, the limiting groove 65 at the outer end of the side pressure unit 5 just cooperates with the lower end of the anti-reverse rod 62 to form an anti-reverse limit, effectively preventing the side pressure unit 5 from moving back due to the reaction force of the blank, and ensuring the reliability of clamping. When the billet needs to be released, the lifting pressure plate 4 moves upward, driving the lifting rod 61 and the stop rod 62 to rise synchronously. The lower end of the stop rod 62 disengages from the limiting groove 65, and the abutment between the lower inclined surfaces of the lifting rod 61 and the stop rod 62 and the pushing inclined surface 64 also disengages. The side pressure unit 5 loses its horizontal driving force and can move back and reset along the side sliding groove 8 to complete the release of the billet.

[0035] Example 5 In this embodiment, in addition to the structural features of the aforementioned embodiments, the power connection 7 includes a transmission plate 71, a transmission wedge 72, a plurality of transmission shafts 73, and a plurality of lifting springs 74. Each of the transmission shafts 73 is slidably disposed in the base 1, and its lower end and upper end are respectively connected to the transmission plate 71 and the lifting pressure plate 4. The lifting springs 74 are sleeved on the outside of the transmission shafts 73, and their upper and lower ends abut against the bottom surface of the lifting pressure plate 4 and the top surface of the base 1, respectively. The driver 3 is used to cooperate with the transmission wedge 72 to control the lifting of the transmission plate 71, the lifting plate 41, and each transmission shaft 73.

[0036] In this embodiment of the application, the driver 3 includes a linear cylinder 31 and a push-pull plate 32. The linear cylinder 31 is fixed on the bottom surface of the base 1 and is used to drive the push-pull plate 32 to slide between the transmission plate 71 and the base 1. The push-pull plate 32 is fixed on the outer end of the piston rod of the linear cylinder 31. The push-pull plate 32 is inclined toward the bottom surface of one end of the transmission wedge 72 and is used to push the transmission wedge 72 up and down.

[0037] In this embodiment of the application, the base 1 is provided with a plurality of support plates 33 on its bottom surface. When the transmission plate 71 is lowered to its lowest position, the bottom surface of the transmission plate 71 is still higher than the bottom surface of the support plate 33.

[0038] like Figure 2 and Figure 4As shown, due to the above structure, when the lifting pressure plate 4 needs to be driven down for clamping operations, the linear cylinder 31 of the driver 3 is activated, pushing the push-pull plate 32 to slide horizontally between the transmission plate 71 and the base 1. The inclined bottom surface of the push-pull plate 32 facing the transmission wedge 72 contacts the transmission wedge 72 and generates downward pushing force, which drives the transmission wedge 72, the transmission plate 71 and each transmission shaft 73 to slide down synchronously along the base 1. The lifting spring 74 sleeved on the outside of the transmission shaft 73 is squeezed by the lifting pressure plate 4 and the base 1, which generates elastic deformation and stores elastic potential energy. While the transmission shaft 73 slides down, it drives the lifting pressure plate 4 to descend smoothly, realizing the subsequent clamping action. When the lifting plate 4 needs to be raised to release the billet, the linear cylinder 31 resets and pulls the push-pull plate 32 to slide in the opposite direction. The push-pull plate 32 disengages from the transmission wedge 72, and the lifting spring 74 releases its stored elastic potential energy, pushing the lifting plate 4 upward. At the same time, it drives each transmission shaft 73, transmission plate 71, and transmission wedge 72 to reset upward synchronously until the lifting plate 4 returns to its initial height. The several support plates 33 on the bottom surface of the base 1 not only ensure the stability of the overall fixture placement, but also effectively avoid contact interference between the transmission plate 71 and the placement surface during the descent process because the bottom surface of the transmission plate 71 is still higher than the bottom surface of the support plate 33 when it descends to the lowest position. This ensures that the lifting action of the power connector 7 and the driver 3 is smooth and without jamming.

[0039] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0040] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An automotive swing arm swaging fixture comprising a base, a clamping assembly and a driver, characterized by, The clamping assembly comprises a lifting press plate, a pair of side press units and a pair of linkage units; the lifting press plate is in transmission connection with the driver through a power connecting piece; the pair of side press units are symmetrically arranged and are slidingly installed on the top surface of the base through side sliding grooves; each side press unit is in transmission connection with the lifting press plate through a linkage unit; when the lifting press plate moves towards the base, the pair of side press units move towards each other synchronously.

2. The automotive swing arm forging clamp of claim 1, wherein, The lifting press plate comprises a lifting plate body, a missing groove, a sliding plate and a push-pull swing arm; the lifting plate body is floatingly arranged above the base through the power connecting piece; the missing groove is arranged at the front end of the lifting plate body; the sliding plate is slidingly matched with the bottom of the lifting plate body through a lower sliding groove; one end of the push-pull swing arm is hingedly connected to the top surface of the base away from the missing groove, and the other end is connected to the end of the sliding plate away from the missing groove through an elastic connecting piece; the end of the lower sliding groove away from the push-pull swing arm is a closed end.

3. The automotive swing arm forging clamp of claim 2, wherein, The elastic connecting piece comprises a mounting groove, a connecting rod and a cross rod; the mounting groove is arranged on the sliding plate; the cross rod is slidingly installed in the mounting groove and is provided with a return spring between the front end of the mounting groove and the cross rod; one end of the connecting rod is fixedly connected to the cross rod, and the other end penetrates out of the mounting groove and is hingedly connected to the end of the push-pull swing arm away from the base.

4. The automotive swing arm forging clamp of claim 2, wherein, The side sliding groove and the lower sliding groove are large inside and small outside; the side edges of the side press units and the sliding plate are respectively matched with the side sliding groove and the lower sliding groove.

5. The automotive swing arm forging clamp of claim 1, wherein, The side press unit comprises a press block, a pair of press heads and a separation spring; the press block is slidingly installed in the side sliding groove; the separation spring is arranged at the inner end of the press block; the pair of press heads are respectively rotatably installed at the inner end of the top of the press block through circular grooves; the exposed part of the press head is provided with a pressing surface.

6. The automotive swing arm forging clamp of claim 1, wherein, The linkage unit comprises a lifting rod, a retreat-stopping rod and a push-moving groove; the lifting rod is fixedly connected to the bottom surface of the lifting press plate, and the inner side of the lower end thereof is inclined; the retreat-stopping rod is fixedly connected to the bottom outer side of the lifting rod, and the inner side of the lower end thereof is inclined; the inner side wall of the push-moving groove is provided with an upward push-moving inclined surface at the middle portion thereof; the push-moving inclined surface is matched with the inclined surfaces of the lower ends of the lifting rod and the retreat-stopping rod, so as to convert the downward force of the lifting rod and the retreat-stopping rod into driving force for driving the horizontal movement of the side press unit.

7. The automotive swing arm forging clamp of claim 6, wherein, The linkage unit is further provided with a limiting groove; the limiting groove is arranged at the outer end of the side press unit; when the side surface of the lifting rod is in contact with the lower portion of the inner side wall of the push-moving groove, the limiting groove is matched with the lower end of the retreat-stopping rod.

8. The automotive swing arm forging clamp of claim 1, wherein, The power connecting piece comprises a transmission plate, a transmission wedge, a plurality of transmission shafts and a plurality of jacking springs; each transmission shaft is slidingly arranged in the base, and the lower end and the upper end thereof are connected to the transmission plate and the lifting press plate respectively; the jacking spring is sleeved outside the transmission shaft, and the upper end and the lower end thereof are in abutment with the bottom surface of the lifting press plate and the top surface of the base respectively; the driver is used for cooperating with the transmission wedge to control the lifting of the transmission plate, the lifting plate and each transmission shaft.

9. The automotive swing arm forging clamp of claim 8, wherein, The driver comprises a linear cylinder and a push-pull plate, the linear cylinder is fixed on the bottom surface of the base and used to drive the push-pull plate to slide between the transmission plate and the base, the push-pull plate is fixed on the outer end of the piston rod of the linear cylinder, and the bottom surface of the push-pull plate towards one end of the transmission wedge is inclined and used to push the transmission wedge to lift.

10. The automotive swing arm forging clamp of claim 8, wherein, The bottom surface of the base is provided with a plurality of supporting plates, and the bottom surface of the transmission plate is still higher than the bottom surface of the supporting plates when the transmission plate is lowered to the lowest position.

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