A positioning system for welding floors of multiple models of new energy vehicles

Abstract

The present invention belongs to the technical field of automobile production equipment, and specifically relates to a positioning system for welding floors of multiple models of new energy vehicles, comprising two groups of positioning components symmetrically arranged on both sides of a production line, the two groups of positioning components both comprising a front longitudinal beam front end positioning mechanism, a front longitudinal beam rear end positioning mechanism, a rear longitudinal beam front end positioning mechanism, a rear longitudinal beam rear end positioning mechanism, a welding assembly and a plurality of double cylinder mechanisms, the front longitudinal beam front end positioning mechanism comprising a first bracket, a first rocker arm and a second rocker arm are respectively hinged on the first bracket, a first pin cylinder and a second pin cylinder are respectively arranged on the first rocker arm and the second rocker arm, the double cylinder mechanism comprises a first cylinder and a second cylinder, and through the front longitudinal beam front end positioning mechanism, the front longitudinal beam rear end positioning mechanism, the rear longitudinal beam front end positioning mechanism, the rear longitudinal beam rear end positioning mechanism, and the welding assembly, the co-linear welding production of floors of eight models of new energy vehicles is realized, while reducing the space occupied by the line.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile production equipment, and in particular relates to a positioning system for welding floors of multiple models of new energy vehicles. Background Art

[0002] In the main automobile assembly line, the body-in-white positioning system is a key device to ensure the accuracy and stability of body welding. The positioning system is generally set on both sides of the automobile assembly line. When the automobile body-in-white is transported to the assembly station, the various mechanisms of the positioning system are docked and clamped with the holes or positioning points on the automobile body-in-white to achieve the positioning of the automobile body-in-white. The automobile body-in-white positioning system can improve production efficiency. The precise positioning fixture can ensure the rapid and accurate assembly of parts, shorten the production cycle, and improve production efficiency; it can ensure product quality. Through precise positioning, it can avoid body quality problems caused by assembly errors, such as deformation, welding leakage, etc., and ensure the stability and safety of the whole vehicle; at the same time, it can also reduce production costs, reduce rework and maintenance costs in the production process, and reduce production costs. With the rapid development of the automobile industry, the requirements for positioning systems are getting higher and higher.

[0003] In order to produce various models of new energy vehicles, existing automobile production lines will set up multiple positioning systems suitable for various models on the main line workstations. During the body welding process, the positioning holes at the bottom of the white body are positioned by pins. During production, the pins on the rocker arm need to be driven by a cylinder to swing up and down to the positioning holes at the bottom of the white body. When there are two sets of positioning systems for different models, each corresponding positioning mechanism of the two positioning systems is adjacent, and the positioning mechanisms at the same position of the two positioning systems cannot be used at the same time, resulting in the size of the cylinder used to drive the rocker arm to swing limited, unable to support heavier models, and the body weight of new energy vehicles is heavy, so there are certain restrictions in the production of new energy models.

[0004] Based on this, a positioning system for floor welding of multiple models of new energy vehicles is proposed. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a positioning system for welding floors of multiple models of new energy vehicles.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A positioning system for welding floors of multiple types of new energy vehicles comprises two groups of positioning components symmetrically arranged on both sides of a production line, wherein the two groups of positioning components comprise a front longitudinal beam front end positioning mechanism, a front longitudinal beam rear end positioning mechanism, a rear longitudinal beam front end positioning mechanism, a rear longitudinal beam rear end positioning mechanism, a welding assembly and a plurality of dual-cylinder mechanisms, wherein the front longitudinal beam front end positioning mechanism comprises a first bracket, a first rocker arm and a second rocker arm are respectively hinged on the first bracket, a first pin cylinder and a second pin cylinder are respectively arranged on the first rocker arm and the second rocker arm, the dual-cylinder mechanism comprises a first cylinder and a second cylinder, the first cylinder and the second cylinder are respectively rotatably connected to the first bracket, and a first telescopic rod and a second telescopic rod on the first cylinder and the second cylinder are respectively hinged to the first rocker arm and the second rocker arm, and the two ends of the first cylinder and the second cylinder are respectively connected to each other, and the first cylinder and the second cylinder are connected to improve the supporting force.

[0008] Furthermore, the first cylinder and the second cylinder also include a first sleeve and a second sleeve, respectively, the first sleeve and the second sleeve are respectively connected to the first piston and the second piston, the first telescopic rod and the second telescopic rod are respectively slidably sleeved in the first sleeve and the second sleeve, the first telescopic rod and the second telescopic rod are respectively telescoped in the first sleeve and the second sleeve for being in a working state and a non-working state, respectively.

[0009] Furthermore, the front longitudinal beam rear end positioning mechanism includes a second bracket, a third rocker arm and a fourth rocker arm are hinged on the second bracket respectively, a third pin cylinder and a fourth pin cylinder are respectively provided on the third rocker arm and the fourth rocker arm, and a double cylinder mechanism is connected to the third rocker arm and the fourth rocker arm;

[0010] The fifth rocker arm and the sixth rocker arm are also hinged on the second bracket, and the fifth rocker arm and the sixth rocker arm are respectively provided with a first positioning clamp and a second positioning clamp. The fifth rocker arm and the sixth rocker arm are connected with a double-cylinder mechanism, and the first positioning clamp and the second positioning clamp are used to horizontally clamp on the rear end of the front longitudinal beam of the vehicle body.

[0011] Further, the rear longitudinal beam front end positioning mechanism includes a third bracket, the third bracket is hinged with a seventh rocker arm and an eighth rocker arm respectively, the seventh rocker arm and the eighth rocker arm are respectively provided with a fifth pin cylinder and a sixth pin cylinder, and the seventh rocker arm and the eighth rocker arm are connected with a double cylinder mechanism;

[0012] The third bracket is also hinged with a ninth rocker arm and a tenth rocker arm, and the ninth rocker arm and the tenth rocker arm are respectively provided with a third positioning fixture and a fourth positioning fixture. The ninth rocker arm and the tenth rocker arm are connected with a double-cylinder mechanism, and the third positioning fixture and the fourth positioning fixture are used to horizontally clamp on the front end of the rear longitudinal beam of the vehicle body.

[0013] Furthermore, the rear end positioning mechanism of the rear longitudinal beam includes a fourth bracket, on which is hinged an eleventh rocker arm and a fixedly connected telescopic arm, on which the eleventh rocker arm and the telescopic arm are respectively provided with a seventh pin cylinder and an eighth pin cylinder, and the eleventh rocker arm and the telescopic arm are connected with a double cylinder mechanism.

[0014] Furthermore, the welding assembly includes a fifth bracket, a twelfth rocker arm is hinged on the fifth bracket, a third cylinder is hinged on the fifth bracket, a third telescopic rod on the third cylinder is hinged on the twelfth rocker arm, a thirteenth rocker arm is hinged on the twelfth rocker arm, the twelfth rocker arm is hinged on the fourth cylinder in the opposite direction of the third cylinder, the fourth telescopic rod on the fourth cylinder is hinged on the thirteenth rocker arm, and a welding chuck is provided on the thirteenth rocker arm.

[0015] Furthermore, the plurality of rocker arms all swing from inside to outside and from top to bottom.

[0016] Furthermore, the first piston and the second piston are respectively provided with a first through hole and a second through hole communicating with the first sleeve and the second sleeve, and the first through hole and the second through hole are respectively provided with a first solenoid valve and a second solenoid valve;

[0017] Furthermore, the component switching arrangement of the front longitudinal beam front end positioning mechanism, the front longitudinal beam rear end positioning mechanism, the rear longitudinal beam front end positioning mechanism, the rear longitudinal beam rear end positioning mechanism and the welding assembly is used to realize the co-line welding production of the floors of eight models of new energy vehicles.

[0018] The beneficial effects of the present invention are:

[0019] (1) By interconnecting the two ends of the first cylinder and the second cylinder, the air cavities of the first cylinder and the second cylinder on both sides of the first piston and the second piston are interconnected, and the cross-sectional area of ​​the cylinder is increased by interconnection. Since only one of the first pin cylinder and the second pin cylinder can be positioned with the corresponding car body in white at the same time, generally only one of the first cylinder and the second cylinder can work at the same time. By interconnecting the first cylinder and the second cylinder, when one of the pin cylinders is not working, the corresponding cylinder can also work. By interconnecting the two cylinders, the support force for the body in white is increased. When used to produce a heavier vehicle model, there is no need to set a corresponding cylinder with stronger support force to provide greater support force for the pin cylinder. The same effect can be achieved by simply connecting the two cylinders.

[0020] (2) When the first cylinder is in working state, the first solenoid valve on the first piston is opened, and the high-pressure side of the first cylinder is connected to the first sleeve. When the pressure is continuously increased, the high pressure of the first sleeve will push the first telescopic rod to extend and maintain. When the other side of the first cylinder is pressurized, the first telescopic rod will gradually retract as the pressure decreases. At the same time, the second telescopic rod of the second cylinder in the non-working state is in a retracted state and the second solenoid valve is in a closed state. At this time, although the sleeve will move with the second piston, the second telescopic rod is completely retracted into the sleeve, causing the corresponding second rocker arm to swing accordingly, but the swing amplitude is small and will not interfere with the body-in-white, and vice versa.

[0021] (3) By means of the component switching settings of the front longitudinal beam front end positioning mechanism, the front longitudinal beam rear end positioning mechanism, the rear longitudinal beam front end positioning mechanism, and the rear longitudinal beam rear end positioning mechanism, the first pin cylinder, the second pin cylinder, the third pin cylinder, the fourth pin cylinder, the fifth pin cylinder, the sixth pin cylinder, the seventh pin cylinder, and the eighth pin cylinder are switched; by means of the component switching settings of the welding assembly, the first spot welding gun and the second spot welding gun are switched, thereby realizing the co-linear welding production of the floors of eight models of new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention after removing the vehicle body;

[0025] Figure 3 It is a structural schematic diagram of the front longitudinal beam front end positioning mechanism of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the front longitudinal beam rear end positioning mechanism of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the front end positioning mechanism of the rear longitudinal beam of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the rear end positioning mechanism of the rear longitudinal beam of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the welding assembly of the present invention;

[0030] Figure 8 It is a schematic diagram of the structure of the double cylinder mechanism of the present invention;

[0031] Fig. 9 It is a schematic diagram of the component arrangement for switching between multiple vehicle types of the present invention.

[0032] Legend: 1. First bracket; 101. First rocker arm; 102. Second rocker arm; 103. First pin cylinder; 104. Second pin cylinder; 2. Second bracket; 201. Third rocker arm; 202. Fourth rocker arm; 203. Fifth rocker arm; 204. Sixth rocker arm; 205. Third pin cylinder; 206. Fourth pin cylinder; 207. First positioning fixture; 208. Second positioning fixture; 3. Third bracket; 301. Seventh rocker arm; 302. Eighth rocker arm; 303. Fifth pin cylinder; 304. Sixth pin cylinder; 305. Ninth rocker arm; 306. Tenth rocker arm; 307. Third positioning fixture; 308. Fourth positioning fixture; 4 , the fourth bracket; 401, the eleventh rocker arm; 402, the telescopic arm; 403, the seventh pin cylinder; 404, the eighth pin cylinder; 501, the first cylinder; 502, the second cylinder; 5011, the first piston; 5012, the first sleeve; 5013, the first telescopic rod; 5014, the first solenoid valve; 5021, the second piston; 5022, the second sleeve; 5023, the second telescopic rod; 5024, the second solenoid valve; 6, the fifth bracket; 601, the third cylinder; 602, the fourth cylinder; 603, the twelfth rocker arm; 604, the thirteenth rocker arm; 605, the welding chuck; 606, the first spot welding gun; 607, the second spot welding gun. DETAILED DESCRIPTION

[0033] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0034] like Figure 1-Figure 9 As shown, a positioning system for floor welding of multiple models of new energy vehicles of the present invention comprises two groups of positioning components symmetrically arranged on both sides of the production line, both groups of positioning components comprise a front longitudinal beam front end positioning mechanism and a plurality of double cylinder mechanisms, the front longitudinal beam front end positioning mechanism comprises a first bracket 1, the first bracket 1 is hinged with a first rocker arm 101 and a second rocker arm 102, respectively, the first rocker arm 101 and the second rocker arm 102 are respectively provided with a first pin cylinder 103 and a second pin cylinder 104, the double cylinder mechanism comprises a first cylinder 501 and a second cylinder 502, the first cylinder 501 and the second cylinder 502 are respectively rotatably connected to the first bracket 1, and the first telescopic rod 5013 and the second telescopic rod 5023 on the first cylinder 501 and the second cylinder 502 are respectively hinged to the first rocker arm 101 and the second rocker arm 102, the first cylinder 501 and the second cylinder 502 are respectively connected at both ends, and the first cylinder 501 and the second cylinder 502 are connected to improve the supporting force;

[0035] Since the positions of the positioning holes on the white bodies of different models of cars are different when producing different models of cars, a general automobile production line needs to move and reposition the entire positioning system. However, replacing the entire positioning system will cause the production line to occupy a large space for placing multiple positioning systems for replacement during use. In order to make it more convenient to use, two sets of positioning mechanisms with similar structures but different positions of positioning pins are placed at the position of each positioning mechanism in the positioning system on the production line for positioning adaptation of different models. Since two sets of positioning mechanisms adapted to different models are set up in the same area at the same time, each positioning mechanism needs to use a cylinder to drive the pin to rise or fall, which is used to fix the white body when it enters the assembly station for assembly and switch between different states of separation during movement. The two sets of positioning mechanisms require two sets of cylinder assemblies. When one set of cylinder assemblies needs to be used to support a heavier model, the size of its cylinder also needs to be larger, so it will take up a larger space.

[0036] In order to reduce the space occupied while being able to set up two sets of positioning systems at the same time, the first cylinder 501 and the second cylinder 502 on the front end positioning mechanism of the front longitudinal beam are interconnected at both ends, and the air cavities of the first cylinder 501 and the second cylinder 502 on both sides of the first piston 5011 and the second piston 5021 are interconnected. The cross-sectional area of ​​the cylinder is increased by interconnection. Since only one of the first pin cylinder 103 and the second pin cylinder 104 can be positioned with the corresponding car body in white at the same time, generally only one of the first cylinder 501 and the second cylinder 502 can work at the same time. By interconnecting the first cylinder 501 and the second cylinder 502, when one of the pin cylinders is not working, the corresponding cylinder can also work. The mutual connection of the two cylinders increases the supporting force for the white body. When used to produce heavier models, there is no need to set a corresponding cylinder with stronger supporting force to provide greater supporting force for the pin cylinder, and the same effect can be achieved by only connecting the two cylinders.

[0037] The first rocker arm 101 and the second rocker arm 102 are hinged on the first bracket 1 at the same time, and the first cylinder 501 and the second cylinder 502 are hinged to the first bracket 1 at the same time, and the first telescopic rod 5013 and the second telescopic rod 5023 are hinged to the first rocker arm 101 and the second rocker arm 102 respectively. When the first telescopic rod 5013 or the second telescopic rod 5023 is extended or retracted, the first rocker arm 101 and the second rocker arm 102 swing accordingly. The swing of the first rocker arm 101 or the second rocker arm 102 can be used to insert the first pin cylinder 103 or the second pin cylinder 104 into the positioning hole of the body-in-white. Moreover, the first cylinder 501 and the second cylinder 502 only need to drive the first rocker arm 101 and the second rocker arm 102 to swing to the target position, and the first pin cylinder 103 and the second pin cylinder 104 can also be extended or retracted. Therefore, the first pin cylinder 103 and the second pin cylinder 104 will drive the pins at their heads to be inserted into the positioning holes, thereby completing the positioning and fixed support of the body-in-white.

[0038] Since the first rocker arm 101 and the second rocker arm 102 will swing at the same time after the first cylinder 501 and the second cylinder 502 are connected to each other, and it can be known from the above embodiment that only the pin cylinder on one rocker arm can support and position the body-in-white at the same time, and one of the first rocker arm 101 and the second rocker arm 102 that swings at the same time has a probability of failing to position the body-in-white due to the different corresponding vehicle models, and may also cause interference. Therefore, in order to prevent the two rocker arms on the same positioning mechanism from interfering with each other, the first cylinder 501 and the second cylinder 502 further include a first sleeve 5012 and a second sleeve 5022, respectively. The first sleeve 5012 and the second sleeve 5022 are respectively connected to the first piston 5011 and the second piston 5021, and the first telescopic rod 5013 and the second telescopic rod 5023 are respectively slidably sleeved in the first sleeve 5012 and the second sleeve 5022, and the first telescopic rod 5013 and the second telescopic rod are respectively telescoped in the first sleeve 5012 and the second sleeve 5022 for being in a working state and a non-working state respectively;

[0039] The first telescopic rod 5013 and the second telescopic rod 5023 are slidably sleeved in the first sleeve 5012 and the second sleeve 5022, and the first telescopic rod 5013 and the second telescopic rod 5023 can respectively form a locked state and an unlocked state with the first sleeve 5012 and the second sleeve 5022. When the first rocker arm 101 needs to swing, the first telescopic rod 5013 and the sleeve are controlled to be in an extended state and locked with each other, so that the first rocker arm 101 is in a working state and the first cylinder 501 can normally drive the first rocker arm 101 to swing. At this time, the second telescopic rod 5023 and the second sleeve 5022 are in an unlocked state. Therefore, although the second cylinder 50 2 will move with the movement of the piston in the first cylinder 501, however, since the second telescopic rod 5023 and the second sleeve 5022 are in a free sliding state, the second rocker arm 102 will not swing accordingly and is in a non-working state, so the second cylinder 502 will not drive the second rocker arm 102 to rise, and vice versa, when the second cylinder 502 is in a working state, the first telescopic rod 5013 and the first sleeve 5012 are also in a non-working state and are freely retracted, and limited points are set in the first sleeve 5012 and the second sleeve 5022 to prevent the first telescopic rod 5013 and the second telescopic rod 5023 from sliding out.

[0040] In one embodiment, the positioning assembly further includes a front longitudinal beam rear end positioning mechanism, the front longitudinal beam rear end positioning mechanism includes a second bracket 2, the second bracket 2 is respectively hinged with a third rocker arm 201 and a fourth rocker arm 202, the third rocker arm 201 and the fourth rocker arm 202 are respectively provided with a third pin cylinder 205 and a fourth pin cylinder 206, the third rocker arm 201 and the fourth rocker arm 202 are connected with a double cylinder mechanism; the second bracket 2 is also hinged with a fifth rocker arm 203 and a sixth rocker arm 204, the fifth rocker arm 203 and the sixth rocker arm 204 are respectively provided with a first positioning fixture 207 and a second positioning fixture 208, the fifth rocker arm 203 and the sixth rocker arm 204 are connected with a double cylinder mechanism, the first positioning fixture 207 and the second positioning fixture 208 are used to horizontally clamp on the rear end of the front longitudinal beam of the vehicle body;

[0041] The third rocker arm 201, the fourth rocker arm 202 and the dual-cylinder mechanism have the same structure as the positioning mechanism at the front end of the front longitudinal beam, with only differences in the setting position and the relative positions of the two rocker arms and the pin cylinders on the rocker arms. The fifth rocker arm 203 and the sixth rocker arm 204 have the same structure as part of the first rocker arm 101 and the second rocker arm 102, but their tops are respectively set as the first positioning fixture 207 and the second positioning fixture 208. The first positioning fixture 207 and the second positioning fixture 208 both include two upper and lower positioning blocks. After the fifth rocker arm 203 and the sixth rocker arm 204 are driven by the cylinder to swing, the first positioning fixture 207 and the second positioning fixture 208 are controlled to be buckled on the rear end of the front longitudinal beam of the automobile body in white. Through the mutual cooperation of the two first positioning fixtures 207 or the second positioning fixtures 208 of the two groups of positioning assemblies set at both ends of the production line, the front longitudinal beam part of the body in white is clamped and positioned.

[0042] In one embodiment, the positioning assembly further includes a rear longitudinal beam front end positioning mechanism, the rear longitudinal beam front end positioning mechanism includes a third bracket 3, a seventh rocker arm 301 and an eighth rocker arm 302 are respectively hinged on the third bracket 3, a fifth pin cylinder 303 and a sixth pin cylinder 304 are respectively provided on the seventh rocker arm 301 and the eighth rocker arm 302, and a double cylinder mechanism is connected to the seventh rocker arm 301 and the eighth rocker arm 302;

[0043] The third bracket 3 is also hinged with a ninth rocker arm 305 and a tenth rocker arm 306, and the ninth rocker arm 305 and the tenth rocker arm 306 are respectively provided with a third positioning fixture 307 and a fourth positioning fixture 308, and the ninth rocker arm 305 and the tenth rocker arm 306 are connected with a double cylinder mechanism, and the third positioning fixture 307 and the fourth positioning fixture 308 are used to be horizontally clamped on the front end of the rear longitudinal beam of the vehicle body;

[0044] The overall structure of the front end positioning mechanism of the rear longitudinal beam is the same as that of the rear end positioning mechanism of the front longitudinal beam. The fifth pin cylinder 303 and the sixth pin cylinder 304 on the front end positioning mechanism of the rear longitudinal beam also push out the pins and insert them into the positioning holes at the bottom of the body-in-white after the seventh or eighth rocker arm 302 swings into place. At the same time, the sixth rocker arm 204 or the tenth rocker arm 306 swings under the action of the dual cylinder mechanism and buckles the third positioning fixture 307 or the fourth positioning fixture 308 at the front end position of the rear longitudinal beam of the body-in-white.

[0045] In one embodiment, the positioning assembly further includes a rear end positioning mechanism of the rear longitudinal beam, a fourth bracket 4 of the rear end positioning mechanism of the rear longitudinal beam, an eleventh rocker arm 401 hingedly connected and a telescopic arm 402 fixedly connected are arranged on the fourth bracket 4, a seventh pin cylinder 403 and an eighth pin cylinder 404 are arranged on the eleventh rocker arm 401 and the telescopic arm 402 respectively, and a double cylinder mechanism is connected to the eleventh rocker arm 401 and the telescopic arm 402;

[0046] The eleventh rocker arm 401 swings under the driving action of the dual-cylinder structure to make the seventh pin cylinder 403 arranged on the top thereof swing up and down, while the telescopic arm 402 is tilted on the fourth bracket 4, and the eighth pin cylinder 404 is arranged at the telescopic top and moves obliquely with the driving of the dual-cylinder structure, and is used to be inserted into different positioning holes on the bottom of the body-in-white together with the seventh pin cylinder 403 and position the body-in-white.

[0047] In addition to the positioning assembly for positioning, a welding assembly for body-in-white welding is also included, the welding assembly includes a fifth bracket 6, a twelfth rocker arm 603 is hinged on the fifth bracket 6, a third cylinder 601 is hinged on the fifth bracket 6, a third telescopic rod on the third cylinder 601 is hinged on the twelfth rocker arm 603, a thirteenth rocker arm 604 is hinged on the twelfth rocker arm 603, the twelfth rocker arm 603 is hinged on the fourth cylinder 602 in the opposite direction of the third cylinder 601, a fourth telescopic rod on the fourth cylinder 602 is hinged on the thirteenth rocker arm 604, and a welding chuck 605 is provided on the thirteenth rocker arm 604;

[0048] The third cylinder 601 and the fourth cylinder 602 on the welding assembly are different from the dual-cylinder mechanism. The third cylinder 601 and the fourth cylinder 602 are not connected to each other, but are independent cylinders. The twelfth rocker arm 603 and the thirteenth rocker arm 604 on the welding assembly are hinged to each other and form different swinging directions under the driving action of the third cylinder 601 and the fourth cylinder 602, so that the welding chuck 605 arranged on the thirteenth rocker arm 604 has a higher degree of freedom, so that more positions on the bottom of the white body can be welded.

[0049] Since the two groups of positioning components have the same structure and are respectively arranged on both sides of the production line, and an assembly line is set in the middle of the production line for the transportation of automobile white bodies, in order to prevent the swinging rocker arms from blocking the white bodies moving on the assembly line, in one embodiment, several rocker arms are swung from inside to outside and from top to bottom, that is, the swing amplitude of the rocker arms shall not exceed the area where the automobile white body moves in the assembly line.

[0050] In the above embodiment, the cylinder in the non-working state needs to provide support force for the cylinder in the working state, and the telescopic rod connected to it remains stationary to prevent the telescopic rod from driving the corresponding rocker arm to swing and causing interference between the pin cylinder on the top of the rocker arm and the body-in-white. Therefore, in order to fix the relative position of the telescopic rod and the sleeve in the working state, and in the non-working state, the telescopic rod freely expands and contracts in the sleeve with the movement of the piston, the first piston 5011 and the second piston 5021 are respectively provided with a first through hole and a second through hole connected to the first sleeve 5012 and the second sleeve 5022, and the first through hole and the second through hole are respectively provided with a first solenoid valve 5014 and a second solenoid valve 5024;

[0051] When the first cylinder 501 is in a working state, the first solenoid valve 5014 on the first piston 5011 is opened, and the high-pressure side of the first cylinder 501 is connected to the first sleeve 5012. After continuous pressurization, the high pressure of the first sleeve 5012 will push the first telescopic rod 5013 to extend and maintain. When the other side of the first cylinder 501 is pressurized, the first telescopic rod 5013 will gradually retract as the pressure decreases. At the same time, the second telescopic rod 5023 of the second cylinder 502 in a non-working state is in a retracted state and the second solenoid valve 5024 is in a closed state. At this time, although the sleeve will move with the second piston 5021, the second telescopic rod 5023 is completely retracted into the sleeve, causing the corresponding second rocker arm 102 to swing accordingly, but the swing amplitude is small and cannot abut against the body in white. Interference. On the contrary, when the second cylinder 502 is in working state and the first cylinder 501 is in non-working state, the same is true. At the same time, all the dual-cylinder mechanisms including the front longitudinal beam rear end positioning mechanism, the rear longitudinal beam front end positioning mechanism and the rear longitudinal beam rear end positioning mechanism are also the same.

[0052] Therefore, when two rocker arms and cylinders corresponding to the pin cylinders for different models are used, the supporting force of the cylinder on the white body of a heavier model can be increased while keeping the size of the cylinder unchanged, and the positioning component can be applied to more models.

[0053] When multiple models are switched for production, the first pin cylinder 103, the second pin cylinder 104, the third pin cylinder 205, the fourth pin cylinder 206, the fifth pin cylinder 303, the sixth pin cylinder 304, the seventh pin cylinder 403 and the eighth pin cylinder 404 are switched through the component switching setting of the first bracket 1 of the front longitudinal beam front end positioning mechanism, the second bracket 2 of the front longitudinal beam rear end positioning mechanism, the third bracket 3 of the rear longitudinal beam front end positioning mechanism, and the fourth bracket 4 of the rear longitudinal beam rear end positioning mechanism. The first spot welding gun 606 and the second spot welding gun 607 are switched through the component switching setting of the fifth bracket 6 of the welding assembly to realize the co-linear welding production of the floor 10 of the first model M01, the second model M02, the third model M03, the fourth model M04, the fifth model M05, the sixth model M06, the seventh model M07 and the eighth model M08 of the new energy vehicle. The eight models can be switched for production at will, such as Fig. 9 As shown, if the welding production of the floor 10 of the first model M01 is switched to that of the second model M02, the positioning of the first pin cylinder 103 is switched to that of the second pin cylinder 104, the positioning of the third pin cylinder 205 is switched to that of the fourth pin cylinder 206, the positioning of the fifth pin cylinder 303 is switched to that of the sixth pin cylinder 304, the positioning of the seventh pin cylinder 403 is switched to that of the eighth pin cylinder 404, and the first spot welding gun 606 does not need to be switched, thereby realizing the switching from the first model M01 to the welding production of the floor 10 of the second model M02.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A positioning system for floor welding of multiple models of new energy vehicles, characterized by: It comprises two groups of positioning components symmetrically arranged on both sides of the production line, and the two groups of positioning components both comprise a front longitudinal beam front end positioning mechanism, a front longitudinal beam rear end positioning mechanism, a rear longitudinal beam front end positioning mechanism, a rear longitudinal beam rear end positioning mechanism, a welding assembly and a plurality of double cylinder mechanisms, the front longitudinal beam front end positioning mechanism comprises a first bracket, a first rocker arm and a second rocker arm are respectively hinged on the first bracket, a first pin cylinder and a second pin cylinder are respectively arranged on the first rocker arm and the second rocker arm, the double cylinder mechanism comprises a first cylinder and a second cylinder, the first cylinder and the second cylinder are respectively rotatably connected to the first bracket, and a first telescopic rod and a second telescopic rod on the first cylinder and the second cylinder are respectively hinged to the first rocker arm and the second rocker arm, and two ends of the first cylinder and the second cylinder are respectively connected to each other, and the first cylinder and the second cylinder are connected to improve the supporting force; The first cylinder and the second cylinder also include a first sleeve and a second sleeve respectively, the first sleeve and the second sleeve are connected to the first piston and the second piston respectively, the first telescopic rod and the second telescopic rod are slidably sleeved in the first sleeve and the second sleeve respectively, the first telescopic rod and the second telescopic rod are telescoped in the first sleeve and the second sleeve respectively and are used to be in a working state and a non-working state respectively.

2. A positioning system for floor welding of multiple models of new energy vehicles according to claim 1, characterized in that: The front longitudinal beam rear end positioning mechanism comprises a second bracket, a third rocker arm and a fourth rocker arm are respectively hinged on the second bracket, a third pin cylinder and a fourth pin cylinder are respectively arranged on the third rocker arm and the fourth rocker arm, and a double cylinder mechanism is connected to the third rocker arm and the fourth rocker arm; The fifth rocker arm and the sixth rocker arm are also hinged on the second bracket, and the fifth rocker arm and the sixth rocker arm are respectively provided with a first positioning clamp and a second positioning clamp. The fifth rocker arm and the sixth rocker arm are connected with a double-cylinder mechanism, and the first positioning clamp and the second positioning clamp are used to horizontally clamp on the rear end of the front longitudinal beam of the vehicle body.

3. A positioning system for floor welding of multiple types of new energy vehicles according to claim 2, characterized in that: The rear longitudinal beam front end positioning mechanism comprises a third bracket, a seventh rocker arm and an eighth rocker arm are respectively hinged on the third bracket, a fifth pin cylinder and a sixth pin cylinder are respectively arranged on the seventh rocker arm and the eighth rocker arm, and a double cylinder mechanism is connected to the seventh rocker arm and the eighth rocker arm; The third bracket is also hinged with a ninth rocker arm and a tenth rocker arm, and the ninth rocker arm and the tenth rocker arm are respectively provided with a third positioning fixture and a fourth positioning fixture. The ninth rocker arm and the tenth rocker arm are connected with a double-cylinder mechanism, and the third positioning fixture and the fourth positioning fixture are used to horizontally clamp on the front end of the rear longitudinal beam of the vehicle body.

4. A positioning system for floor welding of multiple models of new energy vehicles according to claim 3, characterized in that: The rear end positioning mechanism of the rear longitudinal beam includes a fourth bracket, on which an eleventh rocker arm and a fixedly connected telescopic arm are hingedly provided, the eleventh rocker arm and the telescopic arm are respectively provided with a seventh pin cylinder and an eighth pin cylinder, and the eleventh rocker arm and the telescopic arm are connected with a double cylinder mechanism.

5. A positioning system for floor welding of multiple types of new energy vehicles according to claim 4, characterized in that: The welding assembly includes a fifth bracket, a twelfth rocker arm is hinged on the fifth bracket, a third cylinder is hinged on the fifth bracket, a third telescopic rod on the third cylinder is hinged on the twelfth rocker arm, a thirteenth rocker arm is hinged on the twelfth rocker arm, the twelfth rocker arm is hinged on the fourth cylinder in the opposite direction of the third cylinder, the fourth telescopic rod on the fourth cylinder is hinged on the thirteenth rocker arm, and a welding chuck is provided on the thirteenth rocker arm.

6. A positioning system for floor welding of multiple models of new energy vehicles according to claim 5, characterized in that: The plurality of rocker arms all swing from inside to outside and from top to bottom.

7. A positioning system for floor welding of multiple types of new energy vehicles according to claim 1, characterized in that: The first piston and the second piston are respectively provided with a first through hole and a second through hole communicating with the first sleeve and the second sleeve, and the first through hole and the second through hole are respectively provided with a first solenoid valve and a second solenoid valve.

8. A positioning system for floor welding of multiple types of new energy vehicles according to claim 6, characterized in that: The component switching arrangement of the front longitudinal beam front end positioning mechanism, the front longitudinal beam rear end positioning mechanism, the rear longitudinal beam front end positioning mechanism, the rear longitudinal beam rear end positioning mechanism and the welding assembly is used to realize the co-line welding production of the floors of eight models of new energy vehicles.

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