CN112008313B

CN112008313B - Clamp switching device

Info

Publication number: CN112008313B
Application number: CN202010771274.6A
Authority: CN
Inventors: 郭峰; 张�浩
Original assignee: Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2022-04-29
Anticipated expiration: 2040-08-04
Also published as: CN112008313A

Abstract

The invention aims to provide a fixture switching device capable of realizing collinear production of multiple vehicle types and enhancing the flexibility of a welding main line. When the automobile type switching device is normally used, the positioning pin is inserted into the positioning hole to limit rotation of the mounting disc, the clamping mechanism clamps an automobile body, when the automobile type needs to be switched, external force is inserted into the positioning hole to push the positioning pin out of the positioning hole, the constraint of the positioning pin on the mounting disc is relieved at the moment, then the external force is rotated, the mounting disc rotates to the position of the clamping mechanism corresponding to the switched automobile type along with the external force, the external force is withdrawn, the positioning pin is inserted into the positioning hole again to lock the mounting disc again, and therefore switching of different automobile types is achieved.

Description

Clamp switching device

Technical Field

The invention relates to the technical field of automobile automatic production lines, in particular to a clamp switching device.

Background

In the planning process of the welding production line of the whole automobile factory, the requirement on the flexible production capacity of the production line is higher and higher, the universality of a main line clamp of the welding production line is improved, and the key for ensuring the flexible production of multiple automobile types of the welding production line is realized. If the flexible mixed line production of multiple vehicle types is to be realized, the automatic switching of different welding fixtures needs to be ensured so as to realize the demand of collinear production of different vehicle types. The design of the welding production line clamp of each car factory basically adopts a fixed mode, namely the clamp is distributed on the welding production line, each clamping point is fixed, and automatic switching cannot be realized, so that the flexible production capacity of multiple car types of the production line is low, and generally one line can only produce one car type. In order to solve the problems, the scheme adopted at present is double-guide-rod telescopic switching or sliding rail switching. The main structural form is realized by stretching a double-guide-rod cylinder, or a clamp structure is fixed on two slide rails, and switching is realized by sliding, so that the flexibility degree is poor; meanwhile, the two schemes can only be suitable for two vehicle types, and the current updating speed of the vehicle type has limitation; secondly, the positioning accuracy is not enough, needs extra limit structure, leads to whole location structure too big, and the structure is complicated, influences welding operation.

Disclosure of Invention

The invention aims to provide a clamp switching device which can realize collinear production of multiple vehicle types and strengthen the flexibility of a welding main line.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an anchor clamps auto-change over device, includes the mounting disc, and the interval is provided with the clamping mechanism who is used for pressing from both sides tight automobile body on the global of mounting disc, the mounting disc is coaxial fixed with a pivot, and the pivot rotates and sets up on the fixing base, still is provided with the locating pin on the fixing base, and the locating pin is along the locating hole grafting locking or the separation unblock of seting up on its self endwise slip time and the mounting disc.

According to the scheme, during normal use, the positioning pin is inserted into the positioning hole to limit rotation of the mounting disc, the clamping mechanism clamps the vehicle body, when the vehicle type needs to be switched, external force is inserted into the positioning hole to push the positioning pin out of the positioning hole, at the moment, constraint of the positioning pin on the mounting disc is relieved, then the external force rotates, the mounting disc rotates along with the positioning hole to rotate to the position of the clamping mechanism corresponding to the switched vehicle type, the external force is withdrawn, the positioning pin is inserted into the positioning hole again to lock the mounting disc again, and therefore switching use of different vehicle types is achieved.

Drawings

Fig. 1 and 2 are perspective views of the present invention;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 6 is a schematic structural view of a mounting plate;

FIG. 7 is a schematic structural view of the fixing base;

FIG. 8 is a schematic structural view of the cap, the positioning pin, the sliding shaft, and the rotating shaft;

FIG. 9 is a schematic structural view of the cap, the positioning pin and the sliding shaft;

FIG. 10 is a schematic view of the clamping mechanism;

fig. 11 is a schematic view of the internal structure of fig. 9.

Detailed Description

The present invention is discussed in further detail below in conjunction with fig. 1-11.

The utility model provides a fixture switching device, includes mounting disc 10, and the interval is provided with the clamping mechanism 50 that is used for pressing from both sides tight automobile body on the global of mounting disc 10, mounting disc 10 and a pivot 21 are coaxial fixed, and pivot 21 rotates and sets up on fixing base 30, still is provided with locating pin 41 on fixing base 30, and locating pin 41 is along the locking of pegging graft or separation unblock with locating hole 12 that offers on mounting disc 10 when its self axial slides. The axial direction of the positioning pin 41 and the axial direction of the rotating shaft 21 can be parallel or not parallel, as long as locking and unlocking of the mounting disc 10 can be achieved, the condition that the axial direction of the positioning pin 41 is parallel to the rotating shaft 21 is preferred, in normal use, the positioning pin 41 is inserted into the positioning hole 12 to limit rotation of the mounting disc 10, the clamping mechanism 50 clamps a vehicle body, when a vehicle type needs to be switched, external force is inserted into the positioning hole 12 to push the positioning pin 41 out of the positioning hole and separate the positioning pin 41 from the positioning hole, at the moment, constraint of the positioning pin 41 on the mounting disc 10 is relieved, then the external force rotates, the mounting disc 10 rotates together with the positioning pin to the position of the clamping mechanism 50 corresponding to the switched vehicle type, the external force is withdrawn, the positioning pin 41 is inserted into the positioning hole 12 to lock the mounting disc 10 again, and therefore switching use of different vehicle types is achieved.

Be provided with slide shaft 42 in the fixing base 30, the axle core of slide shaft 42 and the axle core parallel arrangement of pivot 21, the tip that slide shaft 42 kept away from mounting disc 10 is provided with block 43 and both fixed connection, and block 43 is whole to be the tube-shape of opening towards mounting disc 10, and barrel mouth department outwards is provided with turn-ups 431, and locating pin 41 is fixed on turn-ups 531 and is stretched the setting towards the protruding of mounting disc 10. The sliding shaft 42, the cap 43 and the positioning pin 41 are fixedly connected, and when the positioning pin 41 is subjected to an external force, the sliding shaft 42, the cap 43 and the positioning pin 41 synchronously move along the axial direction, which provides a basis for the arrangement of a rear air intake system.

In order to improve the stability of the mounting disc 10 in the positioning state, two positioning pins 41 are arranged on the flange 431 at intervals, pin holes 31 are also formed in the positions of the fixed seat 30 corresponding to the positioning pins 41, and the positioning pins 41 are matched with the positioning holes 12 after penetrating through the pin holes 31 to limit the rotation action of the mounting disc 10.

The front section of the positioning pin 41 is in a conical column shape, a conical sleeve 13 is arranged in the positioning hole 12, and an inner hole of the conical sleeve 13 is in a conical column shape matched with the positioning pin 41. The positioning pin 41 is matched with the inner hole of the taper sleeve 13 to limit the forward movement of the positioning pin 41.

The shaft body of the sliding shaft 42 is sleeved with a cylindrical spring 44, one end of the cylindrical spring 44 abuts against a step arranged on the rotating shaft 21, the other end of the cylindrical spring 44 abuts against a step arranged on the sliding shaft 42, and the cylindrical spring 44 provides elastic force to drive the positioning pin 41 to move towards the direction of the mounting disc 10 to lock the position of the mounting disc 10. In fact, the rotating shaft 21 is hollow and tubular and is sleeved outside the sliding shaft 42, the end of the inner cavity of the rotating shaft 21 is provided with a step, the sliding shaft 42 is also provided with a step, two ends of the cylindrical spring 44 respectively abut against the two steps for energy storage, that is, the cylindrical spring 44 is substantially a compression spring, when the positioning pin 41 is pushed to retreat by external force, the cylindrical spring 44 is in a compression state, when the external force is removed, the cylindrical spring 44 is in an elastic force release state, the whole sliding shaft 42 and the cover cap 43 are driven to move towards the front by elastic force, and the positioning pin 41 is driven to be inserted into the pin hole 31 again to position the mounting disc 10.

Preferably, the fixing seat 30 includes a fixing disk 32, a sleeve 33 is arranged on the disk surface of the fixing disk 32 on the side departing from the mounting disk 10 in a backward extending manner, the sleeve 33 and the fixing disk 32 are arranged concentrically, a tapered roller bearing 22 is arranged in the sleeve 33, and the tapered roller bearing 22 supports the rotating shaft 21 and forms circumferential rotation and axial limit fit.

The pivot 21 is hollow tube form, the periphery that the front end of hollow tube closes on tip position department is provided with flange 211, a plurality of mounting holes a have been seted up on flange 211, the round hole 14 that the mounting disc 10 middle part was seted up, be provided with retaining ring 141 on the 14 inner walls of round hole, the bolt passes behind the mounting hole a that sets up on mounting hole a and the retaining ring 141 with mounting disc 10 and pivot 21 fixed connection, the hollow tube section of flange 211 front portion is inserted and is arranged in the round hole 14 that the mounting disc 10 middle part was seted up, sliding shaft 42 sets up in the inside cavity of pivot 21 and both constitute sliding fit. The connecting flange 211 abuts against the retainer ring 141 and is fixedly connected with the retainer ring by bolts.

A bush 23 is provided in the cylindrical cavity between the rotating shaft 21 and the tapered roller bearing 22 for protecting the rotating shaft 21.

Turn-ups 531 is last to be fixed and is provided with first air pipe joint 61, first air pipe joint 61 is connected with air bar 62, air bar 62 passes behind the via hole 34 of seting up on the fixing base 30 and constitutes the cooperation of pegging graft with the inlet end of fixing the second air pipe joint 63 on the neighbouring fixing base 30 side quotation of mounting disc 10, the hole 15 that link up the quotation both sides is seted up with the corresponding position department of second air pipe joint 63 to mounting disc 10, the end protrusion in the opposite side quotation of mounting disc 10 of giving vent to anger of second air pipe joint 63, the end of giving vent to anger of second air pipe joint 63 communicates and the air feed through trachea and clamping mechanism 50's cylinder 56. Since the first air pipe connector 61 is fixed on the flange 531, when the positioning pin 41 is driven by external force to slide in the positioning hole 12, the first air pipe connector 61 moves back and follows the cap 43 synchronously, so that the ventilation rod 62 connected with the first air pipe connector 61 is inserted into the air inlet end of the second air pipe connector 63 or the ventilation rod 62 is separated from the air inlet end of the second air pipe connector 63, when the ventilation rod 62 is inserted into the air inlet end of the second air pipe connector 63, ventilation is performed for the clamping mechanism, and after the ventilation rod 62 is separated from the air inlet end of the second air pipe connector 63, the mounting plate 10 can rotate.

In order to ensure that the air inlet ends of the air ventilation rod 62 and the second air pipe joint 63 can be accurately connected in an inserted manner, a guide sleeve 64 is sleeved on the end part of the air ventilation rod 62 adjacent to one side of the second air pipe joint 63, and the air inlet end of the second air pipe joint 63 of the guide sleeve 64 is inserted into the guide sleeve 64 and forms sealing fit. The guide sleeve 64 guides the air inlet end of the second air pipe joint 63 to be accurately inserted into the air ventilation rod 62 and form a sealing fit.

The clamping mechanisms 50 are uniformly arranged on the mounting disc 10 at intervals, the positioning holes 12 are arranged on the disc surface at the avoiding position of the clamping mechanisms 50, the baffle plate 16 is fixed at the orifice of the positioning hole 12, the baffle plate 16 is provided with the insertion holes 161, the hole cores of the insertion holes 161 are overlapped with the hole cores of the positioning holes 12, and the aperture of the insertion holes 161 is smaller than the diameter of the front end part of the positioning pin 41. The push pin of the external rotating mechanism is inserted into the positioning hole 12 from the insertion hole 161 to withdraw the positioning pin 41 from the positioning hole 12, so as to release the limit of the mounting plate 10, wherein the insertion hole 161 of the baffle plate 16 plays a role of guiding the external push pin; meanwhile, since the hole diameter of the insertion hole 161 is smaller than the diameter of the front end of the positioning pin 41, the baffle plate 16 also serves to limit the axial position of the positioning pin 41.

Since the mounting plate 10 is intended to rotate and the clamping mechanisms 50 are not necessarily completely symmetrically arranged, the balancing weight 11 is further provided on the mounting plate 10 opposite to the clamping mechanisms 50 for balancing the clamping mechanisms 50, and if the clamping mechanisms 50 are completely symmetrically arranged on the mounting plate 10, the balancing weight 11 is not required.

The concrete structure is as follows: the clamping mechanism 50 is fixed on the mounting disc 10 through the connecting plate 17, the clamping mechanism 50 comprises a pin seat 51, a positioning pin shaft 52 is arranged on the pin seat 51, the positioning pin shaft 52 is in a hollow conical shape, a radial notch penetrating through the side wall is formed in the positioning pin shaft 52, a guide groove 53 is formed in the positioning pin shaft 52, the groove length direction of the guide groove 53 is parallel to the axis core direction of the positioning pin shaft 52, a pressing arm 54 is arranged in the guide groove 53, the pressing arm 54 is matched with a boss 55 on the pin seat 51 to clamp a corresponding workpiece, the pressing arm 54 can move along the guide groove 53 to a contraction position where the pressing arm 54 contracts to the inside of the notch of the positioning pin shaft 52, and a clamping position where the pressing arm 54 extends out of the notch of the positioning pin shaft 52 and is matched and clamped with the boss 55, when in the contraction position, the pressing arm 54 does not interfere with the insertion of the positioning pin shaft 52 into a positioning hole of a vehicle body, after the pin shaft 52 to be positioned is inserted into the positioning hole of the vehicle body, the pressing arm 54 is unfolded to the clamping position, the position at which the sheet metal part of the vehicle body is sandwiched between the pressing arm 54 and the boss 55 is defined.

Further, the pressure arm 54 includes an arm 541, a shaft hole 542 is formed in a middle section of the arm 541 and movably hinged to the pin seat 51 through a hinge shaft, a hole core of the shaft hole 542 is arranged in a horizontal direction, a pressure hook 543 is formed at an upper end of the arm 541, a connection hole 544 connected to a piston rod of the air cylinder 56 is formed at a lower end of the arm 541, and the air cylinder 56 drives the arm 541 to rotate around the hinge shaft to drive the pressure hook 543 to move along the guide groove 53.

The fixing seat 30 is fixedly arranged on the support 70, the support 70 is fixedly connected with the foundation, and a plurality of clamp switching devices are arranged on the foundation to position positioning holes in different positions on the vehicle body so as to ensure the positioning stability and reliability.

Claims

1. A clamp switching device is characterized in that: the automobile body clamping device comprises a mounting disc (10), clamping mechanisms (50) for clamping an automobile body are arranged on the circumferential surface of the mounting disc (10) at intervals, the mounting disc (10) is coaxially fixed with a rotating shaft (21), the rotating shaft (21) is rotatably arranged on a fixed seat (30), a positioning pin (41) is further arranged on the fixed seat (30), and the positioning pin (41) is inserted into a positioning hole (12) formed in the mounting disc (10) for locking or separating and unlocking when sliding along the axial direction of the positioning pin;

a sliding shaft (42) is arranged in the fixed seat (30), a shaft core of the sliding shaft (42) is arranged in parallel with a shaft core of the rotating shaft (21), a cover cap (43) is arranged at the end part, far away from the mounting disc (10), of the sliding shaft (42) and is fixedly connected with the end part, the whole cover cap (43) is in a cylindrical shape with an opening facing the mounting disc (10), a flanging (431) is outwards arranged at the opening of the cylindrical shape, and the positioning pin (41) is fixed on the flanging (431) and convexly extends towards the mounting disc (10);

the fixing seat (30) comprises a fixing disc (32), a sleeve (33) extends backwards from the disc surface of one side, deviating from the mounting disc (10), of the fixing disc (32), the sleeve (33) and the fixing disc (32) are arranged in a concentric mode, a tapered roller bearing (22) is arranged in the sleeve (33), and the tapered roller bearing (22) supports the rotating shaft (21) and forms circumferential rotation and axial limiting fit;

turn-ups (431) are gone up the fixed first trachea joint (61) that is provided with, first trachea joint (61) are connected with air bar (62), air bar (62) pass behind via hole (34) of seting up on fixing base (30) and fix the inlet end constitution grafting cooperation of second trachea joint (63) on the neighbouring fixing base (30) of mounting disc (10) one side quotation, hole (15) of lining up quotation both sides are seted up in the corresponding position department of mounting disc (10) and second trachea joint (63), the end protrusion in the opposite side quotation of mounting disc (10) of giving vent to anger of second trachea joint (63), the end of giving vent to anger of second trachea joint (63) is through cylinder (56) intercommunication and the air feed of trachea with clamping mechanism (50).

2. The clip switching apparatus according to claim 1, wherein: two positioning pins (41) are arranged on the flanging (431) at intervals, pin holes (31) are also formed in the positions, corresponding to the positioning pins (41), of the fixing seat (30), and the positioning pins (41) penetrate through the pin holes (31) and then are matched with the positioning holes (12) to limit the rotation action of the mounting disc (10).

3. The clip switching apparatus according to claim 2, wherein: the front section of the positioning pin (41) is in a conical column shape, a conical sleeve (13) is arranged in the positioning hole (12), and an inner hole of the conical sleeve (13) is in a conical column shape matched with the positioning pin (41).

4. The clip switching apparatus according to claim 1, wherein: the shaft body of the sliding shaft (42) is sleeved with a cylindrical spring (44), one end of the cylindrical spring (44) abuts against a step arranged on the rotating shaft (21), the other end of the cylindrical spring abuts against a step arranged on the sliding shaft (42), and the cylindrical spring (44) provides elastic force to drive the positioning pin (41) to move towards the direction of the mounting disc (10) to lock the position of the mounting disc (10).

5. The clip switching apparatus according to claim 1, wherein: pivot (21) are hollow tube form, the periphery that the front end of hollow tube closed on tip position department is provided with flange (211), a plurality of mounting holes (a) have been seted up on flange (211), round hole (14) seted up in mounting disc (10) middle part, be provided with retaining ring (141) on round hole (14) inner wall, the bolt passes behind mounting hole (a) that sets up on mounting hole (a) and retaining ring (141) mounting disc (10) and pivot (21) fixed connection, the hollow tube section of flange (211) front portion is inserted and is arranged in round hole (14) of seting up in mounting disc (10) middle part, sliding shaft (42) set up in pivot (21) inside cavity and both constitute sliding fit.

6. The clip switching apparatus according to claim 5, wherein: a bushing (23) is arranged in a cylindrical cavity between the rotating shaft (21) and the tapered roller bearing (22).

7. The clip switching apparatus according to claim 1, wherein: the end part of the ventilation rod (62) close to one side of the second air pipe joint (63) is sleeved with a guide sleeve (64), and the air inlet end of the guide sleeve (64) and the second air pipe joint (63) is inserted into the guide sleeve (64) to form sealing fit.

8. The clip switching apparatus according to claim 1, wherein: clamping mechanism (50) are even on mounting disc (10), the interval sets up, and locating hole (12) set up on the quotation of clamping mechanism (50) dodge position department, and locating hole (12) drill way department is fixed with baffle (16), has seted up jack (161) on baffle (16), and the hole core coincidence of the hole core of jack (161) and locating hole (12) and the aperture of jack (161) are less than the diameter of locating pin (41) front end tip.

9. The clip switching apparatus according to claim 8, wherein: a balancing weight (11) is also arranged on the mounting disc (10) opposite to the clamping mechanism (50).

10. The clip switching apparatus according to claim 8, wherein: clamping mechanism (50) are fixed on mounting disc (10) through connecting plate (17), clamping mechanism (50) are including key seat (51), be provided with location round pin axle (52) on key seat (51), location round pin axle (52) are hollow toper form, location round pin axle (52) are provided with the radial incision that link up the lateral wall, are provided with guide way (53) in location round pin axle (52), and the groove length direction of guide way (53) is parallel with the axle core direction of location round pin axle (52), and guide way (53) are provided with presses arm (54), press arm (54) and key seat (51) upper ledge (55) cooperation to press the tight work piece that corresponds.

11. The clip switching apparatus according to claim 10, wherein: the pressure arm (54) include armed lever (541), the middle section of armed lever (541) is provided with shaft hole (542) and movably articulates with round pin seat (51) through the articulated shaft, the hole core in shaft hole (542) arranges for the horizontal direction, the upper end of armed lever (541) is provided with pressure hook portion (543), the connecting hole (544) of being connected with cylinder (56) piston rod is seted up to the lower extreme, cylinder (56) drive armed lever (541) rotate around the articulated shaft and drive pressure hook portion (543) along guide way (53) motion.

12. The clip switching apparatus according to claim 1, wherein: the fixing seat (30) is fixedly arranged on the support (70), and the support (70) is fixedly connected with the foundation.