Avoidance type tool clamp for new energy automobile body part welding

Abstract

The invention relates to a receding type tool clamp for new energy automobile body part welding, the receding type tool clamp comprises a clamp base and a plurality of first clamps and second clamps arranged on the clamp base, and the second clamps are connected with threaded holes in an automobile body chassis through threaded rods for positioning and clamping. By arranging the first clamp and the second clamp with various different clamping positions, the clamping positions are adjusted in the automobile body welding process so that automobile body part welding can be conveniently conducted on a chassis part, particularly when a battery pack protection shell is assembled, supporting and positioning are conducted by arranging a plurality of threaded rods in the middle of an automobile body, and the automobile body part welding efficiency is improved. According to the battery pack protective shell welding fixture, the clamping arms are arranged in the middle of the battery pack protective shell to prevent deformation caused by stress in the welding process due to lack of support in the middle, the clamping arms can sequentially avoid in the upward mounting process of the battery pack protective shell, assembly is not affected, when the fixture is used for welding related components of a chassis, a large suspension fixture does not need to be additionally arranged, and the cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of new energy vehicle manufacturing, and in particular relates to an avoidance type tooling fixture for welding new energy vehicle body parts. Background Art

[0002] With the growing development of new energy vehicles, the production lines of new energy vehicles tend to be unmanned, and intelligent robots are used for automated stamping, welding, painting and assembly. In the welding process of body parts, supporting clamps are generally set at the bottom of the body to clamp the body, and the body parts are welded by multiple welding robots.

[0003] For new energy vehicles, according to design requirements, an integrated battery pack protective shell needs to be installed on the chassis of some new energy vehicles, which almost covers the entire width of the chassis. Therefore, during the production process, it is necessary to switch the fixture to remove the support fixture at the bottom of the vehicle body, and switch the fixture to perform suspended clamping from the front and rear sides of the vehicle body to install the above-mentioned battery pack protective shell from the bottom. This not only increases the cost of large fixtures for the welding production line, but also lacks support clamping in the middle part of the vehicle body after switching, which is prone to deformation and inaccurate positioning due to local force when welding or assembling parts. Summary of the invention

[0004] The purpose of the present invention is to provide a simple-structured and reasonably-designed avoidance fixture for welding new energy vehicle body parts in order to solve the above-mentioned problem.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A circumventing fixture for welding a new energy vehicle body part, comprising a fixture base and a plurality of first fixtures and a second fixture arranged on the fixture base, wherein the second fixture is connected to a threaded hole on a vehicle body chassis through a threaded rod for positioning and clamping, and the second fixture comprises a base plate and further comprises

[0007] A clamping assembly, which is used to support the threaded rod, comprises a pair of fixed columns arranged on a base plate, a rotating sleeve rotatably arranged on the fixed columns, and a clamping arm arranged on the rotating sleeve, wherein the clamping arms on the two fixed columns are staggered to clamp the threaded rod from both sides;

[0008] A pushing assembly, which is used to push the clamping arm to clamp the threaded rod, comprises a hydraulic cylinder and a base arranged on the hydraulic cylinder, wherein a plurality of unlockable locking pins are arranged in the base;

[0009] The avoidance device is used to lock / unlock the locking pins one by one so that the clamping arm avoids the battery pack protective shell.

[0010] As a further preferred embodiment, a walking device is provided under the clamp base, and a translation device is provided inside the clamp base, which is used to store the second clamp inward or translate it out to both sides. The walking device is a prior art, which travels on the production line through a track to facilitate the welding or assembly of body parts. The translation device is used to store the second clamp in the clamp base to prevent its outward extension from affecting the welding process of the robot arm on the body parts.

[0011] As a further preferred solution, the rotating sleeve is provided with a torsion spring so that the clamping arm has a tendency to move away from the threaded rod. The torsion spring causes the corresponding protruding arm to automatically rotate out when the locking pin is unlocked, and the corresponding clamping arm leaves the threaded rod.

[0012] As a further preferred solution, a protruding arm for being pushed by the pushing component extends from the surface of the rotating sleeve.

[0013] As a further preferred embodiment, the locking pin is telescopically arranged in the base, and the convex arm can rotate in both directions to pass over the unlocked locking pin, wherein the locking pin is kept extended by a first spring, and a sliding block is arranged in the locking pin in a direction perpendicular to the sliding direction, and a latch is arranged at the end of the sliding block for plugging with the base to fix the locking pin, and a secondary pin for pulling out the sliding block is slidably arranged in the locking pin, and the secondary pin is kept extended by the second spring, and when compressed back, the sliding block is pulled out through an oblique groove provided on the side surface of the secondary pin, and a limiting protrusion that enters the oblique groove is provided on the surface of the sliding block. This scheme unlocks the locking pin by providing a secondary pin, and when the convex arm rotates along the direction of clamping the threaded rod, the convex arm first presses the secondary pin, and the locking pin can slide freely, so that the convex arm can pass over the locking pin, but is locked by the locking pin and cannot return, and when the convex arm rotates in the direction away from the threaded rod, external force is required to press the secondary pin first to unlock the locking pin.

[0014] As a further preferred embodiment, the avoidance device includes a lifting device and a lifting cylinder rotatably arranged on the lifting device, the lifting cylinder is driven to rotate reciprocatingly, and an extension arm is arranged on the side surface of the lifting cylinder, which is used to push the protruding arm to rotate so that the clamping arm is fixed by the locking pin again. The surface of the extension arm is also provided with an L-shaped toggle member, which is used to push the upper secondary pin to unlock and release the upper clamping arm when the clamping arm is locked. This scheme enables the protruding arm to switch between unlocking and locking by arranging the avoidance device, so that the clamping arm has an avoidance function.

[0015] As a further preferred solution, the surface of the lifting cylinder is provided with vertical tooth grooves, and the surface of the base plate is also provided with a sliding seat and a rack sliding in the sliding seat. The rack is engaged with the vertical tooth grooves, and the rack is driven by the crankshaft motor and the connecting rod to reciprocate. This solution further proposes a method of driving the lifting cylinder to reciprocate.

[0016] As a further preferred solution, a telescopic member is further provided below the base plate, a rotary drive member for driving the threaded rod to rotate is provided at the end of the telescopic member, and a drive column corresponding to the rotary drive member is provided at the bottom of the threaded rod.

[0017] The present invention has at least the following beneficial effects:

[0018] The present invention provides a first clamp and a second clamp with multiple different clamping positions, and adjusts the clamping position during the welding process of the vehicle body to facilitate the welding of vehicle body parts on the chassis. Especially when assembling the battery pack protective shell, multiple threaded rods are provided in the middle of the vehicle body for support and positioning to prevent the middle part from being deformed due to force during the welding process due to lack of support. Since multiple interlaced clamping arms are provided, the clamping arms can be avoided in turn during the upward installation of the battery pack protective shell without affecting the assembly. When the clamp is used for welding chassis-related components, there is no need to set up an additional large suspension clamp, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a top view of the overall structure of the present invention.

[0020] Figure 2 Schematic diagram of a second clamp of the present invention.

[0021] Figure 3 It is a schematic diagram of the operation of the second clamp of the present invention.

[0022] Figure 4 It is a side view of a second clamp of the present invention.

[0023] Figure 5 The present invention Figure 2 A magnified view of the structure of part A.

[0024] Figure 6 The present invention Figure 5 Enlarged view of the structure of part B.

[0025] Figure 7 The present invention Figure 6 Middle C1-C2 view.

[0026] Figure 8 It is a cross-sectional view of the lifting tube structure of the present invention.

[0027] In the figure: 1, clamp base; 11, first clamp; 12, walking device; 13, translation device; 2, second clamp; 21, base plate; 22, rotating drive member; 23, telescopic member; 3, clamping assembly; 31, fixed column; 32, rotating sleeve; 33, clamping arm; 34, clamping groove; 35, threaded rod; 36, driving column; 37, convex arm; 38, torsion spring; 4, pushing assembly; 41, hydraulic cylinder; 4 2. Base; 43. Locking pin; 44. First spring; 45. Secondary pin; 46. Second spring; 47. Sliding block; 48. Limiting protrusion; 49. Sliding groove; 410. Latch; 411. Inclined groove; 5. Avoiding device; 51. Lifting device; 52. Lifting cylinder; 53. Extension arm; 54. Toggle member; 55. Vertical tooth groove; 56. Sliding seat; 57. Rack; 58. Crankshaft motor; 59. Connecting rod. DETAILED DESCRIPTION

[0028] The present application is further described in detail below in conjunction with the accompanying drawings. It should be noted that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0029] like Figure 1-8 As shown, a evasive tooling fixture for welding a new energy vehicle body part comprises a fixture base 1 and a plurality of first fixtures 11 and a second fixture 2 arranged on the fixture base 1. The second fixture 2 is connected to a threaded hole on a vehicle body chassis through a threaded rod 35 for positioning and clamping. The second fixture 2 comprises a base plate 21 and further comprises

[0030] The clamping assembly 3 is used to support the threaded rod 35, and includes a pair of fixed columns 31 arranged on the base plate 21, a rotating sleeve 32 rotatably arranged on the fixed columns 31, and a clamping arm 33 arranged on the rotating sleeve 32, wherein the clamping arms 33 on the two fixed columns 31 clamp the threaded rod 35 from both sides in an alternating manner, and the surface of the clamping arm 33 is provided with a clamping groove 34, and the surface of the clamping groove 34 has a thread, so that a plurality of clamping grooves 34 are equivalent to intermittent threaded holes;

[0031] A pushing assembly 4, which is used to push the clamping arm 33 to clamp the threaded rod 35, includes a hydraulic cylinder 41 and a base 42 disposed on the hydraulic cylinder 41, wherein a plurality of unlockable locking pins 43 are disposed in the base 42;

[0032] The avoidance device 5 is used to lock / unlock the locking pins 43 one by one, so that the clamping arm 33 avoids the battery pack protective shell.

[0033] When in use, by setting a plurality of first clamps 11 and second clamps 2 with different clamping positions, the clamping positions are adjusted during the welding process of the vehicle body to facilitate the welding of the vehicle body parts on the chassis. Especially when assembling the battery pack protective shell, a plurality of threaded rods 35 are set in the middle of the vehicle body for support and positioning to prevent the middle part from being deformed due to force during welding due to lack of support. When the battery pack protective shell is installed, the component for fixing the threaded rod 35 (i.e., the clamping arm 33) blocks the installation of the battery pack protective shell. Therefore, a plurality of staggered clamping arms 33 are set. During the upward installation of the battery pack protective shell, the clamping arms 33 give way in turn. After the battery pack protective shell passes upward, the clamping arms 33 are closed again to fix the threaded rod 35.

[0034] A walking device 12 is also provided under the clamp base 1, and a translation device 13 is also provided inside the clamp base 1, which is used to store the second clamp 2 inwardly or translate it out to both sides. The walking device 12 is 13 prior art, and it travels on the production line through a track to facilitate the welding or assembly of the body parts. The translation device 13 is used to store the second clamp 2 in the clamp base 1 to prevent its outward extension from affecting the welding process of the robot arm on the body parts. The translation device 13 can be set with tracks and driving components as needed. This is prior art and will not be repeated here.

[0035] The rotating sleeve 32 is provided with a torsion spring 38 so that the clamping arm 33 has a tendency to move away from the threaded rod 35. The torsion spring 38 makes the corresponding protruding arm 37 automatically rotate out when the locking pin 43 is unlocked, and the corresponding clamping arm 33 leaves the threaded rod 35. The surface of the rotating sleeve 32 extends a protruding arm 37 for the pushing component 4 to push.

[0036] The locking pin 43 is telescopically arranged in the base 42, and the convex arm 37 can rotate in both directions to pass over the unlocked locking pin 43, wherein the locking pin 43 is kept extended by the first spring 44, and a slide groove 49 is arranged in the locking pin 43 in a direction perpendicular to the sliding direction, and a sliding block 47 is arranged in the slide groove 49, and a latch 410 is arranged at the end of the sliding block 47 for plugging with the base 42 to fix the locking pin 43, and a secondary pin 45 for pulling out the sliding block 47 is slidably arranged in the locking pin 43, and the secondary pin 45 is kept extended by the second spring 46, and when it is compressed back, it passes through the opening The inclined groove 411 provided on the side surface of the secondary pin 45 is used to pull out the sliding block 47. The surface of the sliding block 47 is provided with a limiting protrusion 48 that enters the inclined groove 411. In this scheme, the secondary pin 45 is set to unlock the locking pin 43. When the protruding arm 37 rotates in the direction of clamping the threaded rod 35, the protruding arm 37 first presses the secondary pin 45, and the locking pin 43 can slide freely. Then, the protruding arm 37 can pass over the locking pin 43, but is locked by the locking pin 43 and cannot return. When the protruding arm 37 rotates in the direction away from the threaded rod 35, external force is required to press the secondary pin 45 first to unlock the locking pin 43.

[0037] The avoidance device 5 includes a lifting device 51 and a lifting cylinder 52 rotatably arranged on the lifting device 51. The lifting cylinder 52 is driven to rotate reciprocatingly. An extension arm 53 is arranged on the side surface of the lifting cylinder 52, which is used to push the protruding arm 37 to rotate so that the clamping arm 33 is fixed by the locking pin 43 again. The surface of the extension arm 53 is also provided with an L-shaped toggle member 54, which is used to push the upper secondary pin 45 to unlock and release the upper clamping arm 33 when the clamping arm 33 is locked. In this scheme, the avoidance device 5 is arranged to enable the protruding arm 37 to switch between unlocking and locking, so that the clamping arm 33 has an avoidance function.

[0038] Specifically, Figure 2 As shown, from this perspective, when the lifting cylinder 52 rotates clockwise, the toggle member 54 compresses the secondary pin 45 on the right, so that the corresponding locking pin 43 is unlocked, and rotates to the position shown by the dotted line under the action of the torsion spring 38, and then the lifting cylinder 52 rises one level, and then rotates counterclockwise, and the toggle member 54 compresses the secondary pin 45 on the left, and then unlocks another locking pin 43, and then it is raised one level and rotates clockwise. At this time, the extension arm 53 presses against the first unlocked protruding arm 37 to return to the locked position, and at the same time releases the protruding arm 37 above the protruding arm 37. After that, the upgrading cylinder 52 rises one level each time it rotates, and the two protruding arms 37 are always kept in the unlocked state. After the lower protruding arm 37 is re-locked, the upper protruding arm 37 is unlocked. In this state, the clamping arm 33 is as shown in FIG. Figure 3 As shown by the dotted line, the battery pack protective shell is avoided to prevent structural interference, such as Figure 7 As shown, the bottom edge of the protruding arm 37 is higher than the secondary pin 45, so that the toggle member 54 does not affect the rotation of the protruding arm 37 when pressing the secondary pin 45 from below, and the toggle member 54 is set to be L-shaped so that the lifting cylinder 52 will not be blocked by the unlocked protruding arm 37 on the opposite side when rotating.

[0039] A vertical tooth groove 55 is provided on the surface of the lifting cylinder 52, and a sliding seat 56 and a rack 57 sliding in the sliding seat 56 are also provided on the surface of the base plate 21. The rack 57 is engaged with the vertical tooth groove 55, and the rack 57 is driven by the crankshaft motor 58 and the connecting rod 59 to reciprocate.

[0040] A telescopic member 23 is further disposed below the base plate 21 . A rotary driving member 22 for driving the threaded rod 35 to rotate is disposed at the end of the telescopic member 23 . A driving column 36 corresponding to the rotary driving member 22 is disposed at the bottom of the threaded rod 35 .

[0041] The specific implementation method is as follows: when assembling or welding the chassis of the vehicle body, the translation device 13 is first unfolded to both sides to leave a gap in the middle, and then the threaded rod 35 is rotated into the chassis of the vehicle body, and the supporting arm 33 fixes the threaded rod 35. When the battery pack protective shell rises from the middle gap, the mounting holes on the surface of the battery pack protective shell are inserted from the threaded rod 35, and the clamping arms 33 affect the rising of the battery pack protective shell. The avoidance mechanism 5 drives the clamping arms 33 to open and avoid one by one, and the remaining clamping arms 33 can still play the role of clamping the threaded rod 35. This avoidance method enables the battery pack protective shell to have a good supporting and fixing effect when it is assembled and when the relevant parts are welded, and prevents deformation due to stress during the assembly process.

[0042] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof shall not be construed as limiting the scope of the present invention. For those skilled in the art, several modifications and improvements may be made, which shall all fall within the protection scope of the present invention.

Claims

1. A avoidance fixture for welding new energy vehicle body parts, characterized in that: The invention comprises a clamp base (1) and a plurality of first clamps (11) and a second clamp (2) arranged on the clamp base (1); the second clamp (2) is connected to a threaded hole on a vehicle chassis via a threaded rod (35) for positioning and clamping; the second clamp (2) comprises a base plate (21); and A clamping assembly (3) for supporting a threaded rod (35), comprising a pair of fixed columns (31) arranged on a base plate (21), a rotating sleeve (32) rotatably arranged on the fixed columns (31), and a clamping arm (33) arranged on the rotating sleeve (32), wherein the clamping arms (33) on the two fixed columns (31) alternately clamp the threaded rod (35) from both sides; A pushing assembly (4), which is used to push the clamping arm (33) to clamp the threaded rod (35), comprises a hydraulic cylinder (41) and a base (42) arranged on the hydraulic cylinder (41), wherein a plurality of unlockable locking pins (43) are arranged in the base (42); The avoidance device (5) is used to lock / unlock the locking pins (43) one by one so that the clamping arm (33) avoids the battery pack protective shell.

2. According to claim 1, a evasive fixture for welding a new energy vehicle body part is characterized in that: A walking device (12) is also provided below the clamp base (1), and a translation device (13) is also provided inside the clamp base (1) for allowing the second clamp (2) to be stored inwardly or translated out to both sides.

3. The avoidance fixture for welding new energy vehicle body parts according to claim 1 is characterized in that: The rotating sleeve (32) is provided with a torsion spring (38) so that the clamping arm (33) tends to move away from the threaded rod (35).

4. The avoidance fixture for welding new energy vehicle body parts according to claim 1 is characterized in that: A protruding arm (37) for being pushed by the pushing component (4) extends from the surface of the rotating sleeve (32).

5. The avoidance fixture for welding new energy vehicle body parts according to claim 4 is characterized in that: The locking pin (43) is telescopically arranged in the base (42); the convex arm (37) can rotate in both directions to pass over the unlocked locking pin (43); the locking pin (43) is kept extended by a first spring (44); a sliding block (47) is arranged in the locking pin (43) in a direction perpendicular to the sliding direction; a latch (410) is arranged at the end of the sliding block (47) for plugging with the base (42) to fix the locking pin (43); a secondary pin (45) for pulling out the sliding block (47) is slidably arranged in the locking pin (43); the secondary pin (45) is kept extended by a second spring (46); when compressed back, the sliding block (47) is pulled out through an inclined groove (411) provided on the side surface of the secondary pin (45); a limiting protrusion (48) for entering the inclined groove (411) is arranged on the surface of the sliding block (47).

6. The avoidance fixture for welding new energy vehicle body parts according to claim 5 is characterized in that: The avoidance device (5) comprises a lifting device (51), and a lifting cylinder (52) rotatably arranged on the lifting device (51); the lifting cylinder (52) is driven to rotate reciprocatingly; an extension arm (53) is arranged on the side surface of the lifting cylinder (52) for pushing the protruding arm (37) to rotate so that the clamping arm (33) is fixed by the locking pin (43) again; an L-shaped toggle member (54) is also arranged on the surface of the extension arm (53) for pushing the upper secondary pin (45) to unlock and release the upper clamping arm (33) when the clamping arm (33) is locked.

7. The avoidance fixture for welding new energy vehicle body parts according to claim 6 is characterized in that: The surface of the lifting cylinder (52) is provided with a vertical tooth groove (55), and the surface of the base plate (21) is also provided with a sliding seat (56) and a rack (57) sliding in the sliding seat (56), the rack (57) is meshed with the vertical tooth groove (55), and the rack (57) is driven by a crankshaft motor (58) and a connecting rod (59) to reciprocate.

8. The avoidance fixture for welding new energy vehicle body parts according to claim 1 is characterized in that: A telescopic member (23) is also provided below the base plate (21), a rotary drive member (22) for driving the threaded rod (35) to rotate is provided at the end of the telescopic member (23), and a driving column (36) corresponding to the rotary drive member (22) is provided at the bottom of the threaded rod (35).

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