Subframe clamp

Abstract

The application discloses a sub-frame clamp, which comprises support points, first clamping points and first clamping components corresponding to the first clamping points, the support points and the first clamping points are symmetrically provided with two positions, the first clamping points comprise upwardly-opened slot-shaped arc openings, the center of the sub-frame is arranged at the symmetric center of the support points and the first clamping points, the first clamping components comprise clamping mechanisms and synchronous positioning mechanisms, the clamping mechanisms are symmetrically arranged about the center of the sub-frame, and the clamping mechanisms comprise downwardly-opened fixed arc openings. The two ends of the sub-frame are synchronously fixed, the two ends of the sub-frame are relatively balanced under stress, the sub-frame hardly moves or moves a very small distance during clamping, positioning is relatively more accurate, and therefore the quality of the sub-frame after subsequent machining is guaranteed, and the positioning accuracy is improved and the defective product rate is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile parts manufacturing, and particularly relates to a subframe clamp. BACKGROUND

[0002] The subframe is a safety part for reinforcing the automobile body, and the existing subframe is generally formed by extending symmetrically along the center of the automobile head / body to the front and rear parts of the automobile body to form an anti-collision framework, thereby enhancing safety.

[0003] The specific shape of the subframe needs to be adapted to the automobile model, and the subframe generally has an arc-shaped structure and is symmetrical on both sides. Therefore, during the production of the subframe, the subframe needs to be fixed from both sides. Since the shape of the subframe varies according to the automobile model, the corresponding welding equipment is generally universal, that is, the welding equipment may need to weld subframes of other specifications or even other products in addition to welding a certain type of subframe. Therefore, the subframe clamp needs to have a certain degree of universality, and generally is not set as a special-purpose clamp. Therefore, during fixing, a multi-point fixing and positioning method can be used to clamp the subframe, for example, a support point is arranged below the middle part of the subframe, and clamping points are arranged on both sides of the subframe. The middle part of the subframe is supported upward by the support point, and the two sides of the subframe are clamped and fixed downward by the clamping points, so that the stable clamping of the subframe can be ensured. However, when the common clamping equipment is used to fix the subframe, the subframe generally needs to be preassembled to the initial position of the support point and the clamping point, and then the clamping equipment starts to fix. During this process, since the clamp is not special-purpose, the clamping points on both sides of the subframe only have a simple limiting effect at the initial position. If the clamps on both sides act on the two ends of the subframe in sequence, the side that acts first may be offset, which may cause the overall fixation to be offset after fixation, thereby affecting the subsequent production process. SUMMARY

[0004] The purpose of the present application is to provide a subframe clamp that facilitates accurate positioning.

[0005] To achieve the above object, the technical scheme adopted by the present application is as follows: a subframe clamp, comprising a support point, a first clamping point and a first clamping component corresponding to the first clamping point, the support point and the first clamping point are symmetrically provided with two positions, the first clamping point comprises a slot-shaped arc opening upward, the center of the subframe is arranged at the symmetric center of the support point and the first clamping point, the middle part of the subframe is in contact with the support point during preloading, the two ends of the subframe are arranged in the slot-shaped arc opening of the first clamping point at both ends to preliminarily position, the first clamping component comprises a clamping mechanism and a synchronous positioning mechanism, the clamping mechanism is symmetrically arranged about the center of the subframe, the clamping mechanism comprises a fixed arc opening downward, the synchronous positioning mechanism is adapted to simultaneously act on the two ends of the subframe by the fixed arc openings on both sides, and then cooperate with the slot-shaped arc opening to fix the subframe.

[0006] As a preferred, the first clamping component further comprises a driving mechanism, the clamping mechanism comprises a clamping part rotatably arranged, the bottom of the clamping part forms the fixed arc opening; the driving mechanism drives the clamping part to rotate, and the fixed arc opening is clamped into the end of the subframe to cooperate with the slot-shaped arc opening for fixation when the clamping part is close to the slot-shaped arc opening.

[0007] As a preferred, the synchronous positioning mechanism comprises a limiting part, a avoiding part and a rotating rod, the limiting part and the avoiding part are arranged at both ends of the rotating rod and symmetrically distributed about the center of the rotating rod, both ends of the rotating rod correspond to two clamping parts on both sides respectively, the limiting part is used for limiting the rotation of the rotating rod, and the avoiding part is arranged along the radial direction of the rotating rod and slides within a set range; when the clamping part on the first side rotates to clamp, the avoiding part is acted on by the clamping part on the first side to move, the avoiding part is acted on by the limiting part and moves when the avoiding part moves, until the avoiding part moves to the maximum displacement position, the limiting part moves to release the limitation on the side of the rotating rod; when the clamping part on the second side keeps limiting the rotating rod, the rotating rod cannot rotate, so that the avoiding part and the clamping part on the first side abut, so that the clamping part on the first side stops rotating; when the limiting parts on both sides release the limitation on the rotating rod, the clamping parts on both sides simultaneously act on the avoiding part, so that the avoiding part and the rotating rod rotate and avoid along the circumferential direction of the rotating rod, and then the fixed arc openings on both sides simultaneously clamp the two ends of the subframe.

[0008] As a kind of preferred, the middle part of the rotating rod is provided with a fixed part, and the rotating rod is horizontally installed below the clamping part by the fixed part;Two sides of the rotating rod are fixedly installed with fixed sleeve, and the inner cavity radius of the fixed sleeve is greater than the outer wall radius of the rotating rod;The fixed part is fixedly installed with a fixed rod in parallel below the rotating rod, and two limiting parts are respectively vertically inserted into the two sides of the fixed rod, the fixed sleeve is provided with a through hole, the through hole penetrates the rotating rod, the avoiding part penetrates the through hole, the avoiding part moves in the range below the rotating rod in the inner cavity of the fixed sleeve, and the bottom of the limiting part is provided with an elastic element, so that the limiting part is inserted into the through hole of the fixed sleeve in the initial state, to abut against the bottom of the avoiding part and make it rise.

[0009] As a kind of preferred, the outer wall of the avoiding part is formed with a clamping part, and the outer diameter of the clamping part is greater than the inner diameter of the through hole, so that the avoiding part is limited to slide up and down in the internal space of the fixed sleeve below the rotating rod;When the bottom of the clamping part abuts against the inner cavity bottom of the fixed sleeve, the bottom surface of the avoiding part is flush with the bottom surface of the through hole, so that the limiting part completely leaves the through hole.

[0010] As a kind of preferred, the outer side of the fixed sleeve is integrally provided with a fastener, and the fastener and the end of the rotating rod are fixedly installed;The bottom of the limiting part is provided with a limiting block, the elastic element is a spring, and the spring is arranged between the fixed rod and the top surface of the limiting block.

[0011] As a kind of preferred, the bottom of the clamping part is spaced apart with two clamping columns, and the fixed arc opening is formed between the two clamping columns, the top of the slot-shaped arc opening is provided with an inclined surface, and the clamping column abuts against the top of the inclined surface during rotation and clamping, and the clamping column moves down along the inclined surface when continuously rotating.

[0012] As a kind of preferred, the auxiliary frame clamp further comprises a workbench, and the two sides of the support point relative to the workbench are symmetrically provided with two, and the auxiliary frame is placed on the two support points in the initial state.

[0013] As a kind of preferred, the middle part of two support points is also provided with second clamping component, the second clamping component includes two sliding tables and two clamping heads, two clamping heads are fixedly installed on two sliding tables respectively, two sliding tables are respectively provided with two cylinders to drive, so that two clamping heads are close to each other or away from each other, to clamp or release the middle part of auxiliary frame;Two clamping mechanisms are arranged on the two sides of the same sliding table, and the corresponding synchronous positioning mechanism is arranged on the sliding table on this side;The cylinder makes the clamping head pre-fixes the middle part of auxiliary frame, and then two clamping mechanisms start to drive the clamping part to rotate and synchronously clamp and fix the two ends of auxiliary frame.

[0014] As a kind of preferred, the fixing part further includes a fixing frame arranged at the bottom, the height of the fixing frame is adjustable to adjust the initial distance between the avoiding part and the clamping part.

[0015] As a kind of preferred, the clamping mechanism further includes a driving part, a fixed table and a rotating part, the fixed table is fixed on the workbench, the rotating part is rotatably arranged on the two sides of the fixed table, the driving part is suitable for driving the rotating part to rotate, and the clamping part is mounted on the rotating part.

[0016] Compared with the prior art, the application has the beneficial effects that:

[0017] The two ends of the auxiliary frame are fixed synchronously, the stress of the two ends of the auxiliary frame is relatively balanced, the auxiliary frame hardly moves or moves a small distance when clamped, so that the positioning is relatively more accurate, thereby ensuring the quality of the auxiliary frame after subsequent processing, and helping to improve the positioning accuracy and reduce the rate of defective products. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic diagram of one embodiment of the application.

[0019] Figure 2 It is Figure 1 The schematic diagram of partial structure in another view.

[0020] Figure 3 It is Figure 2 The schematic diagram of partial structure in another view.

[0021] Figure 4 It is Figure 3 The enlarged view of partial structure.

[0022] Figure 5 It is the schematic diagram of synchronous positioning mechanism.

[0023] Figure 6 It is the sectional view of partial structure of synchronous positioning mechanism.

[0024] Figure 7 is Figure 6 a working state schematic diagram when the clamping continues on the basis.

[0025] Figure 8 is Figure 7 a working state schematic diagram when the clamping continues on the basis.

[0026] Figure 9 is Figure 6 a working state diagram of the corresponding first clamping component.

[0027] Figure 10 is Figure 7 a working state diagram of the corresponding first clamping component.

[0028] Figure 11 is Figure 8 a working state diagram of the corresponding first clamping component.

[0029] In the figure: 1, workbench; 21, first clamping mechanism; 22, second clamping mechanism; 3, second clamping component; 4, synchronous positioning mechanism; 41, rotating rod; 42, fixed rod; 43, fixed part; 44, fixed sleeve; 45, limiting part; 46, fastener; 47, avoiding part; 48, spring; 49, clamping part; 5, sliding table; 61, first end of subframe; 62, second end of subframe; 7, clamping part; 8, first clamping point; 9, rotating part. DETAILED DESCRIPTION

[0030] Hereinafter, the present application will be further described in conjunction with specific embodiments, and it should be noted that the following described embodiments between or between technical features can be combined to form new embodiments without conflict.

[0031] In the description of the present application, it should be noted that for orientation words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. The orientation and positional relationship shown in the drawing is based on the orientation or positional relationship, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0032] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily have to describe a particular order or sequence.

[0033] The terms "comprise" and "comprising", and any variations thereof, as used in the specification and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of steps or elements does not necessarily comprise only those steps or elements, but can include additional steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

[0034] Embodiments:

[0035] With reference to Figures 1 to 11 , the present application mainly proposes a subframe clamp for clamping and fixing the subframe. The subframe is generally symmetrical in structure, with the middle part corresponding to the middle part of the front or rear of the vehicle, and the two ends corresponding to the two sides of the front or rear of the vehicle, so as to absorb a large amount of collision energy and thereby reduce the damage to the occupants and the main body of the vehicle frame. The subframe is fixed and formed by welding, generally including a horizontal main beam and a vertical longitudinal beam, and the main beam and the longitudinal beam are welded to form the main body of the subframe. The present application mainly clamps the main beam, and the welding equipment welds the longitudinal beam to the main beam after clamping to complete the welding of the subframe. Since the present application mainly clamps the main beam accurately and does not involve the specific welding structure of the longitudinal beam, the main beam of the subsequent subframe is collectively referred to as the subframe, and the clamping and fixing of the subframe is the clamping and fixing of the main beam of the subframe. Due to the strength of the sheet metal of the vehicle body, the streamline design, and the related design based on the appearance, the subframe needs to be adjusted according to different vehicle models, so the size of the subframe is not the same, and therefore the clamp for the subframe needs to be a universal adjustable clamp or a special clamp corresponding to the subframe.

[0036] The present subframe clamp mainly provides a universal clamp, which mainly includes a support point, a first clamping point 8, and a first clamping part 7 corresponding to the first clamping point 8. The support point and the first clamping point 8 are both symmetrically provided with two places, and the first clamping point 8 includes a slot-shaped arc opening upward. The center of the subframe is arranged at the symmetry center of the support point and the first clamping point 8, the middle part of the subframe is in contact with the support point during pre-installation, and the two ends of the subframe are arranged in the slot-shaped arc openings of the two first clamping points 8 to preliminarily position. The slot-shaped arc openings can be used to cope with different specifications of the subframe. The design of the two slots from top to bottom can fix the end part of the subframe in the slot-shaped arc opening at the bottom, and the top slot can press the top of the end part of the subframe. The two cooperate to fix the subframe.

[0037] However, the design of clamping the middle part of the subframe by approaching with two slots has the following defects in the specific clamping process: due to the design of the subframe adapting to the vehicle body, the subframe usually has a bent arc at its end, when the subframe is placed at the clamping point, such as the support point, the support of the middle part of the subframe is relatively flat, and the corresponding end of the subframe is clamped by the first clamping point 8 cooperating with the clamping mechanism, however, the end of the subframe is generally not in a horizontal state, so that the clamping force is difficult to be completely vertical, and the component in the clamping vertical direction will cause the subframe to deviate. The subframe of fixed specification can improve the deviation problem by adjusting the clamping point, however, the curvature and length of different specifications of the subframe are different, so that when the end is fixed, if the two sides are not fixed at the same time, the first fixed end will deviate to the other side when clamped, at this time, the other side is clamped, and the fixed position of the subframe deviates.

[0038] To solve the problem of asynchronous clamping of the two sides, the first clamping part 7 of the subframe clamp of the present application includes a clamping mechanism and a synchronous positioning mechanism 4, the clamping mechanism is symmetrically arranged about the center of the subframe, and is respectively used for clamping the two ends of the subframe. The clamping mechanism includes a fixed arc opening downward, which cooperates with the slot-shaped arc opening to complete the fixation. The two ends of the subframe are fixed synchronously, the two ends of the subframe are relatively balanced in stress, the subframe hardly moves or moves a very small distance when clamped, so that the positioning is relatively more accurate, thereby ensuring the quality of the subframe after subsequent processing.

[0039] As shown in Figure 4 , Figure 9 , the first clamping part 7 further includes a driving mechanism, the clamping mechanism includes a clamping part 7 rotatably arranged, and the bottom of the clamping part 7 forms a fixed arc opening; the driving mechanism drives the clamping part 7 to rotate, and when approaching the slot-shaped arc opening, the fixed arc opening is clamped into the top of the end of the subframe to cooperate with the slot-shaped arc opening to fix. The driving mechanism can adopt a motor or other equipment that can drive rotation, and the specific rotation principle is not described herein.

[0040] As shown in Figure 9 , the clamping mechanism further includes a driving part, a fixed table and a rotating part 9, the fixed table is fixed on the workbench 1, the rotating part 9 is rotatably arranged on both sides of the fixed table, the driving part is adapted to drive the rotating part 9 to rotate, and the clamping part 7 is installed on the rotating part 9. The driving part can select a motor or other equipment that is easy to control according to needs. As shown in Figure 1 , the clamping mechanism is provided with two places corresponding to the two ends of the subframe, i.e. a first clamping mechanism 21 and a second clamping mechanism 22, corresponding to the first end 61 of the subframe and the second end 62 of the subframe.

[0041] As shown in Figure 3 , Figure 4As shown, the bottom of the clamping part 7 is provided with two clamping columns, and a fixed arc opening is formed between the two clamping columns. The top of the slot-shaped arc opening is provided with a slope. During the rotation and clamping of the clamping column, the clamping column first abuts against the top of the slope, and then moves downward along the slope during continuous rotation. The slope is thus arranged. Since the clamping part 7 is matched with the slot-shaped arc opening by rotation, the fixed arc opening generally does not deform to avoid, and after the slope is arranged, if the end part of the auxiliary frame is relatively narrow, the clamping part 7 can continue to clamp downward, thereby adapting to smaller specifications of the auxiliary frame. When the specification of the auxiliary frame is large, a part of the outer contour of the auxiliary frame is in the slot-shaped arc opening at the bottom, the slot-shaped arc opening supports, and then the clamping part at the top and the fixed arc opening directly press tightly, thereby completing the clamping and fixing. At this time, the clamping column does not contact the slope. However, if the end part of the auxiliary frame is relatively thin, the clamping column will act on the relatively low part of the slope, so as to clamp the end part of the auxiliary frame. Figure 4 As shown, the bottom of the clamping part 7 is provided with two clamping columns, and a fixed arc opening is formed between the two clamping columns. The top of the slot-shaped arc opening is provided with a slope. During the rotation and clamping of the clamping column, the clamping column first abuts against the top of the slope, and then moves downward along the slope during continuous rotation. The slope is thus arranged. Since the clamping part 7 is matched with the slot-shaped arc opening by rotation, the fixed arc opening generally does not deform to avoid, and after the slope is arranged, if the end part of the auxiliary frame is relatively narrow, the clamping part 7 can continue to clamp downward, thereby adapting to smaller specifications of the auxiliary frame. When the specification of the auxiliary frame is large, a part of the outer contour of the auxiliary frame is in the slot-shaped arc opening at the bottom, the slot-shaped arc opening supports, and then the clamping part at the top and the fixed arc opening directly press tightly, thereby completing the clamping and fixing. At this time, the clamping column does not contact the slope. However, if the end part of the auxiliary frame is relatively thin, the clamping column will act on the relatively low part of the slope, so as to clamp the end part of the auxiliary frame.

[0042] The synchronous positioning mechanism 4 is adapted to make the clamping parts and the fixed arc openings on both sides act on both ends of the auxiliary frame at the same time, and then cooperate with the slot-shaped arc opening to fix the auxiliary frame. The synchronous positioning mechanism 4 is used to adjust the two clamping parts 7 with different clamping speeds to make the clamping part 7 with faster speed pause first, and then make the clamping parts 7 on both sides rotate at the same time after the clamping part 7 at the rear reaches the same position, so as to make the fixed arc opening press the end part of the auxiliary frame, and then complete the fixing of the auxiliary frame. The synchronous positioning mechanism 4 can pause the clamping part 7 by electric control or mechanical structure, so the following two preferred embodiments of the synchronous positioning mechanism 4 are proposed.

[0043] (1) The first scheme refers to Figure 5 The synchronous positioning mechanism 4 includes a limiting part 45, an avoiding part 47 and a rotating rod 41. The limiting part 45 and the avoiding part 47 are arranged at both ends of the rotating rod 41 and are symmetrically distributed about the center of the rotating rod 41. The two ends of the rotating rod 41 correspond to the two clamping parts 7 on both sides respectively. The limiting part 45 is used to limit the rotation of the rotating rod 41. The avoiding part 47 is arranged along the radial direction of the rotating rod 41 and slides within a set range. Figure 5 As shown, the rotating rod 41 is horizontally installed, and the avoiding part 47 is vertically inserted into the rotating rod 41. The avoiding part 47 needs to act on the clamping part, so it is arranged on the side facing the clamping part 7, that is, it is arranged upward.

[0044] The middle part of the rotating rod 41 is provided with a fixed part 43. The rotating rod 41 is horizontally installed below the clamping part 7 through the fixed part 43. The horizontal installation can refer to Figure 4 and Figure 5 The horizontally installed rotating rod 41 is more likely to form a symmetrical structure corresponding to the clamping parts 7 on both sides.

[0045] As shown in Figure 4 , the two sides of the rotating rod 41 are fixedly installed with fixed sleeves 44, the inner cavity radius of the fixed sleeve 44 is greater than the outer wall radius of the rotating rod 41, and a preferred fixing scheme is that the outer side of the fixed sleeve 44 is integrally provided with a fastener 46, and the fastener 46 and the end of the rotating rod 41 are fixedly installed.

[0046] In order to facilitate the positioning and installation of the limiting part 45, as shown in Figure 5 , Figure 6 , the fixed rod 42 is fixedly installed in parallel below the rotating rod 41, the two limiting parts 45 are respectively vertically inserted into the two sides of the fixed rod 42, the fixed sleeve 44 is provided with a through hole which penetrates the fixed sleeve 44 and the rotating rod 41 (see Figure 6 ), and the avoiding part 47 penetrates the through hole and moves in the range below the rotating rod 41 in the inner cavity of the fixed sleeve 44. The bottom of the limiting part 45 is provided with an elastic member, which makes the limiting part initially inserted into the through hole of the fixed sleeve 44 to abut against the bottom of the avoiding part 47 and make it rise. The bottom of the limiting part 45 is provided with a limiting block, and the elastic member is a spring 48 which is arranged between the fixed rod 42 and the top surface of the limiting block.

[0047] In order to facilitate the installation and positioning of the avoiding part 47, the outer wall of the avoiding part 47 is formed with a clamping part 49, the outer diameter of the clamping part 49 is greater than the inner diameter of the through hole, so that the avoiding part 47 is limited to slide up and down in the internal space of the fixed sleeve 44 below the rotating rod 41; when the bottom of the clamping part 49 abuts against the inner cavity bottom of the fixed sleeve 44, the bottom surface of the avoiding part 47 is flush with the bottom surface of the through hole, so that the limiting part 45 completely leaves the through hole. The main function of the clamping part 49 is that when the avoiding part 47 reaches its maximum displacement, the bottom of the avoiding part 47 is just at the bottom of the fixed sleeve 44, so that the limiting part 45 can completely leave the fixed sleeve 44, thereby releasing the limitation of the limiting part 45 on the rotating rod 41. In fact, when the bottom of the avoiding part 47 protrudes from the through hole of the fixed sleeve 44, the limiting part 45 can also completely leave the fixed sleeve 44, however, when the rotating rod 41 is reset, the protruding avoiding part 47 will interfere with the limiting part 45, thereby making the subsequent reset operation more difficult and not conducive to the subsequent operation.

[0048] In order to facilitate subsequent use, after clamping, the limiting part 45 leaves and is staggered with the through hole of the fixed sleeve 44 due to the rotation of the rotating rod 41, and automatic reset only needs to add a torsional spring at the rotating rod 41, so that the rotating rod 41 can be restored by the torsional spring without other external force. After recovery, it can be recovered from the state of Figure 8 to the state of Figure 7 , and then to the state of Figure 6 . Of course, without the structure of automatic reset such as torsional spring, it can be manually reset each time after use to facilitate the next use.

[0049] The rotation of the clamping portion 7 causes the avoidance portion 47 to move and the restriction portion 45 to release the restriction on the rotation of the rotating rod 41. Please refer to Figures 6 to 11 .

[0050] As shown in Figure 6 , the restriction portion 45 is in the initial state of restricting the rotation of the rotating rod 41. At this time, the top of the restriction portion 45 is inserted into the through hole at the bottom of the fixed sleeve 44 due to the action of the elastic member. At this time, the avoidance portion 47 is also pushed out upward by a certain length. At this time, the rotating rod 41 cannot rotate. As shown in Figure 7 , the step of releasing the restriction is that when the clamping portion 7 is clamping during the rotation, the avoidance portion 47 is moved downward by the action of the clamping portion 7. When the avoidance portion 47 moves, the restriction portion 45 is acted on and moved until the avoidance portion 47 moves to the maximum displacement position. At this time, the restriction portion 45 moves to release the restriction on the rotating rod 41 on this side. At this time, the restriction on this side is released. However, at this time, the clamping portion 7 on the other side still maintains the restriction on the rotating rod 41. Therefore, the rotating rod 41 still cannot rotate. At this time, the avoidance portion 47 has moved to the limit and cannot continue to move. At the same time, the rotating rod 41 cannot rotate. Therefore, the avoidance portion 47 abuts against the clamping portion 7 on the first side, so that the clamping portion 7 on the first side (i.e. the clamping portion 7 on the side that clamps first) stops rotating.

[0051] As shown in Figure 8 , when the clamping portion 7 on the other side also starts to clamp, the restriction portions 45 on both sides release the restriction on the rotating rod 41. At this time, the clamping portions 7 on both sides act on the avoidance portion 47. At this time, the rotating rod 41 is released on both sides, so it can rotate. At this time, the clamping portions 7 on both sides continue to drive the rotation. At this time, the force acting on the avoidance portion 47 no longer causes the avoidance portion 47 to move. As shown in Figure 8 , when the clamping portion 7 continues to act on the avoidance portion 47, the avoidance portion 47 rotates together with the rotating rod 41 as a whole. Therefore, the avoidance portion 47 and the rotating rod 41 rotate to avoid each other along the circumferential direction of the rotating rod 41. Therefore, the clamping portion 7 can continue to rotate and clamp. In turn, the clamping portions 7 on both sides clamp the top of the two ends of the auxiliary frame at the same time. In order to facilitate the rotation of the avoidance portion 47 after the action of the clamping portion 7 and the avoidance portion 47, the top of the avoidance portion 47 can be provided in a spherical shape to facilitate the guidance.

[0052] When resetting, the rotating rod 41 rotates back to the initial position. Due to the arrangement of the clamping portion 49 on the avoidance portion 47, the avoidance portion 47 is located at the maximum displacement position at this time, but does not protrude from the fixed sleeve 44 at the same time. Therefore, the avoidance portion 47 does not interfere with the restriction portion 45 when rotating back. As shown in Figure 7 , at this time, the elastic member causes the restriction portion 45 to move upward, so as to restore Figure 6 the state. As shown in the figure, the avoidance portion 47 and the restriction portion 45 are both rod-shaped to facilitate sliding. The sliding corresponds Figures 6 to 8Move up and down.

[0053] As Figure 1 shown, the subframe clamp further comprises a workbench 1, two support points are symmetrically arranged about the two sides of the workbench 1, and the subframe in the initial state is placed on the two support points. The middle part of the two support points is further provided with a second clamping component 3, the second clamping component 3 comprises two sliding tables 5 and two clamping heads, the two clamping heads are respectively fixedly installed on the two sliding tables, and the two sliding tables 5 are respectively provided with two cylinders for driving, so that the two clamping heads are close to or away from each other, so as to clamp or release the middle part of the subframe; the two clamping mechanisms are arranged on the two sides of the same sliding table 5, and the corresponding synchronous positioning mechanism 4 is arranged on the sliding table 5 on the side; the cylinder makes the clamping head pre-fix the middle part of the subframe, and then the two clamping mechanisms start to drive the clamping part 7 to rotate and synchronously clamp and fix the two ends of the subframe. The bottom of the fixed part 43 can be provided with a fixed frame to be fixedly installed on the sliding table 5, and the avoiding part 47 is not connected with the clamping part 7, so as long as the avoiding part 47 can act on the avoiding part 47 when the clamping part 7 rotates in the initial state, the avoiding part 47, the limiting part 45 and the rotating rod 41 can produce corresponding synchronous effect. According to actual needs, the installation height of the rotating rod 41 can be adjusted to adjust the position of the avoiding part 47 in the initial state. Such adjustment can adjust the time when the clamping part 7 starts to act on the avoiding part 47 at the appropriate time. Such height adjustment can be completed by setting a telescopic fixed frame under the fixed part 43. In fact, the closer the contact time of the two is to the clamping completion time, the better the synchronous effect of the synchronous positioning mechanism 4 is. However, the avoiding part 47 needs to have enough stroke to complete the synchronous action of the two clamping parts 7 on the two sides, so after the rotating rod 41 is installed, the avoiding part 47 cannot be too close to the clamping completion position, and the actual position can be adaptively adjusted according to specific installation and design. Although the sliding table 5 will slide, the sliding table 5 needs to move closer to the middle when clamping, so that the second clamping component 3 pre-fixes the subframe, and therefore the sliding of the sliding table 5 does not actually affect the action of the synchronous positioning mechanism 4.

[0054] (2) The second scheme, wherein the synchronous positioning mechanism 4 can also be set to an automatic recognition scheme: a visual camera is arranged at each of the two clamping parts 7, and after the visual cameras at the two clamping parts 7 both recognize that the clamping part 7 reaches the set position, the clamping part 7 is controlled to clamp at the same time. Or a pressure sensor can also be arranged on the clamping part 7, and when the clamping parts 7 on the two sides are moved to the end of the subframe, the pressure sensors on the two sides both have readings, at which time the clamping part 7 is controlled to clamp, thereby realizing synchronous clamping. In some embodiments, similar recognition and control can also be realized by distance sensors and the like to keep synchronization.

[0055] The foregoing describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments, and the above-described embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A subframe clamp, characterized in that, The device includes a support point, a first clamping point, and a first clamping component corresponding to the first clamping point. Both the support point and the first clamping point are symmetrically arranged in two locations. The first clamping point includes an upward-opening groove-shaped arc. The center of the subframe is located at the symmetrical center of the support point and the first clamping point. During pre-assembly, the middle of the subframe contacts the support point. The two ends of the subframe are respectively positioned within the groove-shaped arc of the first clamping point at both ends for initial positioning. The first clamping component includes a clamping mechanism and a synchronous positioning mechanism. The clamping mechanism is symmetrically arranged about the center of the subframe. The clamping mechanism includes a downward-opening fixed arc. The synchronous positioning mechanism is adapted to simultaneously apply the fixed arcs on both sides to the two ends of the subframe, and then cooperate with the groove-shaped arc to fix the subframe. The first clamping component further includes a driving mechanism. The clamping mechanism includes a rotatably disposed clamping part, the bottom of which forms the fixed arc opening. The driving mechanism drives the clamping part to rotate, and when it approaches the slotted arc opening, the fixed arc opening presses against the end of the subframe to cooperate and fix it with the slotted arc opening. The synchronous positioning mechanism includes a limiting part, a clearance part, and a rotating rod. The limiting part and the clearance part are provided at both ends of the rotating rod and are symmetrically distributed about the center of the rotating rod. The two ends of the rotating rod correspond to the two clamping parts on both sides. The limiting part is used to limit the rotation of the rotating rod, and the clearance part is arranged along the radial direction of the rotating rod and slides within a set range. When the clamping part on the first side rotates to clamp, it acts on the clearance part to move it. When the clearance part moves, it acts on the limiting part and moves it until the clearance part moves to its maximum displacement. Then the limiting part moves to release the restriction on that side of the rotating rod. When the clamping part on the second side restricts the rotating rod, the rotating rod cannot rotate, so that the clearance part and the clamping part on the first side abut against each other, so that the clamping part on the first side stops rotating; When the limiting parts on both sides release the restriction on the rotating rod, the clamping parts on both sides simultaneously act on the avoidance part, so that the avoidance part and the rotating rod rotate and avoid each other along the circumference of the rotating rod, thereby causing the fixed arc openings on both sides to clamp the two ends of the subframe simultaneously.

2. The subframe clamp as described in claim 1, characterized in that, A fixing part is provided in the middle of the rotating rod, and the rotating rod is horizontally installed below the clamping part through the fixing part; a fixing sleeve is fixedly installed on both sides of the rotating rod, and the inner radius of the fixing sleeve is larger than the outer wall radius of the rotating rod; a fixing rod is fixedly installed parallel to the bottom of the rotating rod through the fixing part, and two limiting parts are respectively vertically inserted on both sides of the fixing rod; a through hole is provided in the fixing sleeve from top to bottom, and the through hole passes through the rotating rod from top to bottom; a clearance part passes through the through hole, and the clearance part is restricted to moving within the range below the rotating rod in the inner cavity of the fixing sleeve; an elastic element is provided at the bottom of the limiting part, and the elastic element allows the limiting part to be inserted into the through hole of the fixing sleeve in the initial state, so as to abut against the bottom of the clearance part and raise it.

3. The subframe clamp as described in claim 2, characterized in that, The outer wall of the clearance part is formed with a locking part, the outer diameter of the locking part is larger than the inner diameter of the through hole, so that the clearance part is restricted to slide up and down in the internal space of the fixed sleeve below the rotating rod; when the bottom of the locking part abuts against the bottom of the inner cavity of the fixed sleeve, the bottom surface of the clearance part is flush with the bottom surface of the through hole, so that the restriction part is completely removed from the through hole.

4. The subframe clamp as described in claim 2, characterized in that, The outer side of the fixed sleeve is integrally provided with a fastener, which is fixedly installed with the end of the rotating rod; the bottom of the limiting part is provided with a limiting block, and the elastic element is a spring, which is disposed between the top surface of the fixed rod and the limiting block.

5. The subframe clamp as described in claim 2, characterized in that, Two clamping posts are spaced apart at the bottom of the clamping part, and a fixed arc opening is formed between the two clamping posts. The top of the slotted arc opening is provided with an inclined surface. During the rotation and clamping process, the clamping post first abuts against the top of the inclined surface, and when it continues to rotate, the clamping post moves down along the inclined surface.

6. The subframe clamp as described in claim 2, characterized in that, It also includes a worktable, and a second clamping component is provided in the middle of the two support points. The second clamping component includes two slides and two clamping heads. The two clamping heads are respectively fixedly installed on the two slides. The two slides are each provided with two cylinders for driving, so that the two clamping heads move closer or further apart to clamp or release the middle of the subframe. The two clamping mechanisms are both provided on both sides of the same slide, and the corresponding synchronous positioning mechanism is provided on the slide on that side. The cylinders pre-fix the clamping heads to the middle of the subframe, and then the two clamping mechanisms start to drive the clamping parts to rotate and synchronously clamp and fix the two ends of the subframe.

7. The subframe clamp as described in claim 6, characterized in that, The fixing part also includes a fixing bracket provided at the bottom, the height of which is adjustable to adjust the initial distance between the clearance part and the clamping part.

8. The subframe clamp as described in claim 6, characterized in that, The clamping mechanism further includes a driving unit, a fixed platform, and a rotating unit. The fixed platform is fixed on the worktable, the rotating unit is rotatably disposed on both sides of the fixed platform, the driving unit is adapted to drive the rotating unit to rotate, and the clamping unit is mounted on the rotating unit.

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