CN214643057U

CN214643057U - Flexible positioning system

Info

Publication number: CN214643057U
Application number: CN202120755189.0U
Authority: CN
Inventors: 徐文康; 张展鸿; 解维炳; 王瑾; 董建辉
Original assignee: GAC Motor Co Ltd
Current assignee: GAC Motor Co Ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2021-11-09
Anticipated expiration: 2031-04-13

Abstract

The utility model relates to a positioning system technical field of car production line, more specifically relates to a flexible positioning system, including the main part location subsystem that is used for location and fixed automobile main part, be used for carrying out auxiliary stay to automobile main part and can carry out the middle part auxiliary stay positioning subsystem of altitude mixture control according to different motorcycle types, a plurality of be used for pressing from both sides get with the constitution piece location subsystem of assembly car auxiliary part, middle part auxiliary stay positioning subsystem locates main part location subsystem middle part and is connected rather than, constitute a positioning subsystem and locate main part location subsystem border and be connected rather than. The utility model provides a flexible positioning system utilizes the middle part to set up middle part auxiliary stay location subsystem and carries out the altitude mixture control according to different motorcycle types and realize carrying out auxiliary stay to automobile main body, can effectively reduce the automobile body and receive self action of gravity to produce the phenomenon of buckling deformation in assembling process, improves automobile assembling precision and assembly quality.

Description

Flexible positioning system

Technical Field

The utility model relates to a positioning system technical field of car production line, more specifically relates to a flexible positioning system.

Background

With the increase of the personalized demands and the production and sales volumes of automobile consumption, the number of automobile types produced by a production line is increased, but different automobile types have differences in the structure and the size of parts, the tolerance of a positioning system in the production of the automobile is low at present, the positioning system can only be specially used, different automobile types cannot be shared, a large number of tools and occupied space can be consumed, and the cost is increased.

Chinese patent CN108161304A discloses a four-unit linkage multi-axis flexible positioning system, which can realize the sharing of multiple vehicle types; in the process of producing and assembling the automobile, after the automobile main body is required to be positioned, each auxiliary part is installed on the automobile main body, the four-unit linkage multi-shaft flexible positioning system is only provided with positioning devices at four corners of the positioning system, and no device for auxiliary supporting the automobile main body is arranged in the middle, so that the automobile body is easily subjected to bending deformation under the action of self gravity in the assembling process, and the assembling precision and the assembling quality are influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a can supply the shared flexible positioning system of different motorcycle types in the car production assembling process, be equipped with at this flexible positioning system middle part and be used for carrying out auxiliary stay to the automobile main part and can carry out the middle part auxiliary stay positioning subsystem of altitude mixture control according to different motorcycle types, can effectively reduce the automobile body and receive self action of gravity to produce the phenomenon of buckling deformation in assembling process, improve car assembly precision and assembly quality.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the utility model provides a flexible positioning system, including the main part location subsystem that is used for location and fixed automobile main part, be used for carrying out auxiliary stay to automobile main part and can carry out height control's middle part auxiliary stay location subsystem, a plurality of constitution piece location subsystems that are used for pressing from both sides to get and assemble automobile auxiliary part according to different motorcycle types, middle part auxiliary stay location subsystem locates main part location subsystem middle part and rather than being connected, constitution piece location subsystem locates main part location subsystem border is rather than being connected.

The utility model discloses a main part location subsystem is used for location and fixed automobile body, like the automobile body etc. prepares for follow-up other automobile auxiliary components of continuing to assemble. The middle auxiliary supporting and positioning subsystem is used for carrying out auxiliary supporting on the automobile main body, can effectively reduce the phenomenon that the automobile body is bent and deformed under the action of self gravity in the assembling process, and improves the assembling precision and the assembling quality of the automobile; the middle auxiliary supporting and positioning subsystem can be adjusted in height to adapt to different vehicle types. The component positioning subsystem is used for clamping and assembling automobile auxiliary parts and mounting and fixing the automobile auxiliary parts on the automobile main body. The middle auxiliary supporting and positioning subsystem is arranged in the middle of the main body positioning subsystem, and is considered integrally, so that the gravity of the automobile main body is larger, and the middle part is easier to deform and bend; the component positioning subsystem is arranged on the edge of the main body positioning subsystem, so that the auxiliary parts of the automobile can be conveniently clamped, the interference to the automobile main body is avoided, and a better installation space is provided.

Preferably, the middle auxiliary supporting and positioning subsystem comprises a supporting part and a plurality of lifting positioning units, and the lifting positioning units are sequentially arranged on the supporting part and detachably connected with the supporting part.

Preferably, the support part is a gantry structure.

Preferably, the lifting positioning unit comprises a positioning support member and a telescopic cylinder for adjusting the height of the positioning support member, and the positioning support member is connected with the telescopic cylinder; the two lifting positioning units are symmetrically arranged on two sides of the supporting part.

Preferably, the main part location subsystem is including being used for carrying out the first positioning mechanism of location to automobile body, be used for right first positioning mechanism carries out the base plate that supports, acts on the base plate is realized rightly a plurality of regulation stabilizer blades that first positioning mechanism's six positions were adjusted, first positioning mechanism locates on the base plate and with the connection can be dismantled to the base plate, and a plurality of regulation stabilizer blades are all located base plate bottom and one end all with base plate swing joint, the other end all can be dismantled with ground and be connected.

Preferably, the number of the component positioning subsystems is two, and the two component positioning subsystems are symmetrically arranged at two ends of the middle auxiliary supporting and positioning subsystem and are fixedly connected with the substrate.

Preferably, the component positioning subsystem comprises a gripper mechanism for gripping auxiliary parts of the automobile, a second positioning mechanism capable of connecting different gripper mechanisms after accurate positioning, and the second positioning mechanism is arranged at the bottom of the gripper mechanism and detachably connected with the gripper mechanism.

Preferably, the second positioning mechanism comprises a second positioning unit, a pressing unit and a supporting seat, the second positioning unit is used for positioning the placing position of the gripper mechanism by utilizing a plurality of position-adjustable rolling positioning elements, the pressing unit is used for pressing and fixing the gripper mechanism, the supporting seat is used for supporting the gripper mechanism, the number of the second positioning unit and the number of the pressing unit are two, the second positioning unit and the pressing unit are symmetrically arranged on two sides of the supporting seat, and the supporting seat is arranged at the bottom of the second positioning unit and detachably connected with the second positioning unit.

Preferably, the gripper mechanism comprises a first positioning unit inserted into the second positioning unit to realize positioning and a workpiece clamping unit used for clamping a workpiece; the workpiece clamping device comprises two first positioning units, two workpiece clamping units and a supporting plate, wherein the two first positioning units are connected with each other in the middle, and the workpiece clamping units are symmetrically arranged at two ends of the supporting plate and connected with the supporting plate.

Preferably, the device further comprises a control unit, and the control unit is electrically connected with the main body positioning subsystem, the middle auxiliary supporting and positioning subsystem and the component positioning subsystem.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the base plate is subjected to six-direction position fine adjustment after the first positioning mechanism is located through the adjusting support leg, so that the accurate positioning of the main body positioning subsystem is realized, the positioning error of the automobile main body and the positioning error of the automobile auxiliary part during the assembly of the automobile auxiliary part on the automobile main body are reduced, and the assembly precision and the assembly quality of the automobile part are improved;

(2) the middle part of the automobile main body is supported by adjusting the height of the middle auxiliary supporting and positioning subsystem through the lifting positioning unit so as to be adapted to different automobile types, the phenomenon that an automobile body is bent and deformed under the action of self gravity in the assembling process can be effectively reduced, and the assembling precision and the assembling quality of the automobile are improved;

(3) different gripper mechanisms are replaced according to different vehicle types, and the same second positioning mechanism is shared, so that the positioning and clamping during the assembly of parts of different vehicle types or different parts of the same vehicle type are realized, and the purposes of saving resources and saving the space for placing the clamp are achieved; meanwhile, the rolling positioning element is utilized to realize accurate positioning between the second positioning mechanism and the gripper mechanism, sliding friction is replaced by rolling friction, and assembling convenience and assembling precision are improved.

Drawings

Fig. 1 is a schematic structural diagram of a flexible positioning system according to the present invention;

FIG. 2 is a schematic structural view of a middle auxiliary support positioning subsystem;

FIG. 3 is a schematic structural view of a component positioning subsystem;

FIG. 4 is a schematic structural view of the gripper mechanism;

fig. 5 is a schematic structural diagram of the second positioning mechanism.

The graphic symbols are illustrated as follows:

1. a body positioning subsystem; 11. a first positioning mechanism; 12. a substrate; 13. adjusting the support legs; 2. a middle auxiliary supporting and positioning subsystem; 21. a support portion; 22. a lifting positioning unit; 3. a component positioning subsystem; 31. a gripper mechanism; 311. a first positioning unit; 312. a support block; 313. a workpiece clamping unit; 314. a support plate; 315. positioning pins; 32. a second positioning mechanism; 321. a second positioning unit; 322. a pressing unit; 323. a supporting seat; 324. the positioning element is rolled.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Examples

As shown in fig. 1 to 5, the utility model relates to an embodiment of flexible positioning system, including main part location subsystem 1 that is used for location and fixed automobile main part, be used for carrying out auxiliary stay to automobile main part and can carry out height control's middle part auxiliary stay location subsystem 2 according to different motorcycle types, a plurality of be used for pressing from both sides get with assembly car auxiliary part's component location subsystem 3, middle part auxiliary stay location subsystem 2 locates main part location subsystem 1 middle part and rather than being connected, component location subsystem 3 locates main part location subsystem 1 border and is connected with it.

As an embodiment of the present invention, the middle auxiliary supporting and positioning subsystem 2 includes a supporting portion 21, a plurality of lifting positioning units 22, and the plurality of lifting positioning units 22 are sequentially arranged on the supporting portion 21 and detachably connected to the supporting portion 21.

The support part 21 is used for supporting the lifting positioning unit 22 and is used as a bridge between the lifting positioning unit 22 and the main body positioning subsystem 1, so that the lifting positioning unit 22 can obtain a favorable position and is convenient to be connected with the automobile main body. The lifting positioning unit 22 adjusts different heights to be adapted to automobile bodies of different automobile types through the lifting function of the lifting positioning unit, one end of the lifting positioning unit 22 is connected with the automobile bodies to realize positioning and supporting functions, and the other end of the lifting positioning unit 22 is connected with the supporting part 21 to realize stable placement; the lifting positioning unit 22 and the supporting part 21 which are detachably connected can facilitate the replacement and maintenance of the lifting positioning unit 22.

As an embodiment of the present invention, the supporting portion 21 is a gantry structure.

The portal frame structure has the advantages of strong bearing capacity, large bearing area and good bearing effect, and realizes good positioning and supporting functions.

As an embodiment of the present invention, the lifting positioning unit 22 includes a positioning support member and a telescopic cylinder for adjusting the height of the positioning support member, and the positioning support member is connected to the telescopic cylinder; the two lifting positioning units 22 are symmetrically arranged at two ends of the supporting part 21.

The positioning support piece is connected with the automobile body to realize positioning and supporting functions, and the telescopic cylinder realizes height adjustment of the positioning support piece so as to meet the requirement that the positioning support piece can carry out height adjustment according to different automobile types. The lifting type positioning units 22 symmetrically arranged at the two ends of the supporting part 21 can enable the supporting part 21 to be stressed uniformly, achieve good positioning and supporting effects on the automobile main body, enable the automobile main body to be stressed uniformly, and reduce the probability of bending deformation of the automobile main body in the assembling process. Within the scope of the knowledge of those skilled in the art, the elevating type order unit units are not limited to two, and may be a plurality of elevating type order unit units arranged in sequence along the length direction of the portal frame, so that the contact area with the automobile main body can be increased, the contact stress can be distributed, and the automobile main body can be positioned and supported at a plurality of positions, and the assembly quality can be improved.

As an embodiment of the utility model, main part location subsystem 1 is including being used for carrying out the first positioning mechanism 11 of location to the automobile main part, a base plate 12 for supporting first positioning mechanism 11, act on a plurality of regulation stabilizer blades 13 that base plate 12 realized adjusting six positions of first positioning mechanism 11, first positioning mechanism 11 is located on base plate 12 and can be dismantled with base plate 12 and be connected, base plate 12 bottom and one end all are located to a plurality of regulation stabilizer blades 13 and base plate 12 swing joint, the other end all can be dismantled with ground and be connected.

The first positioning mechanism 11 is used for positioning the automobile main body to be assembled on one hand and positioning the component positioning subsystem 3 placed on the main body positioning subsystem 1 on the other hand; therefore, the accuracy of the positioning of the first positioning mechanism 11 is related to the positioning error of the automobile main body and the component positioning subsystem 3, and further affects the assembly error of the automobile parts to be assembled. The substrate 12 is used for supporting the first positioning mechanism 11, so that the position of the first positioning mechanism 11 in operation is kept unchanged, and the whole first positioning mechanism 11 is convenient to carry; moreover, the substrate 12 is a whole flat plate, which can prevent welding slag from falling into the bottom of the first positioning mechanism 11 and being difficult to clean. The adjusting support legs 13 not only support the substrate 12, but also finely adjust the position of the substrate 12 after the substrate 12 and the first positioning mechanism 11 are wholly located, so that the substrate 12 meets the drawing requirements, and accurately located, and further the accurate positioning of the first positioning mechanism 11 is ensured. Six directions are about six directions about being about, generally can only ensure the position of general when base plate 12 and first positioning mechanism 11 wholly fall to the position, and can not be accurate to the size of millimeter rank, and base plate 12 and first positioning mechanism 11 are relatively heavier itself, be not convenient for move after generally falling to the position, consequently, the utility model discloses an adjust stabilizer blade 13 and just show its advantage protrudingly, preferably, through the structure of simple bolt and nut closure soon, through fixing the nut on base plate 12, utilize bolt and nut closure to carry out position control in order to promote base plate 12 for nut thrust, satisfy production assembly requirement. Can dismantle first positioning mechanism 11 and the base plate 12 of connection can make things convenient for the installation and the change of first positioning mechanism 11 to maintain, a plurality of regulation stabilizer blades 13 can be dismantled with ground and be connected and be convenient for the installation to adjusting stabilizer blade 13, it can be convenient for carry out position control to base plate 12 to adjust stabilizer blade 13 and base plate 12 swing joint, specifically, it is subaerial earlier to be fixed in regulation support one end, the regulator on the regulation support of recycling carries out position control to base plate 12, after the regulation finishes, can carry out permanent fixed through the welding with base plate 12 and regulation stabilizer blade 13, prevent to shift.

As an embodiment of the utility model, component location subsystem 3 is two, and the symmetry is located the both sides of middle part auxiliary stay location subsystem 2 and with base plate 12 fixed connection.

The component positioning subsystem 3 is used for assembling auxiliary parts on the automobile main body, and the component positioning subsystems 3 are symmetrically arranged on two sides of the middle auxiliary supporting and positioning subsystem 2, so that the component subsystems can be kept away from the automobile main body, a wider assembling space is created, and interference with the automobile main body in the assembling process is avoided; on the other hand, the two component positioning subsystems 3 are arranged at the two ends, and the two component positioning subsystems 3 positioned at different positions of the automobile body work simultaneously from different positions of the automobile body, so that the assembly efficiency can be improved.

As an embodiment of the present invention, the component positioning subsystem 3 includes the gripper mechanism 31 for clamping the auxiliary part of the automobile, the second positioning mechanism 32 and the second positioning mechanism 32 which can connect the different gripper mechanisms 31 after the precise positioning, and the second positioning mechanism 32 is disposed at the bottom of the gripper mechanism 31 and detachably connected to the gripper mechanism 31.

The gripper mechanism 31 is used for gripping automobile parts, the second positioning mechanism 32 is used for positioning and connecting the gripper mechanism 31, and due to the fact that the size and structure differences of the automobile parts of different automobile types are large, the second positioning mechanism 32 and the gripper mechanism 31 are detachably connected, replacement of different gripper mechanisms 31 according to different automobile types is facilitated, but the second positioning mechanism 32 is shared, resources can be saved, storage space can be saved, and production configuration optimization can be achieved as far as possible. The second positioning mechanism 32 can accurately position the gripper mechanism 31 during connection by using its specific positioning element, so as to reduce as much as possible the positioning error during the assembly of the auxiliary parts of the automobile caused by continuously replacing the gripper mechanism 31, which affects the assembly quality.

As an embodiment of the present invention, the second positioning mechanism 32 includes a second positioning unit 321 for positioning the gripper mechanism 31 by using a plurality of position-adjustable rolling positioning elements 324, a pressing unit 322 for pressing the gripper mechanism 31, and a supporting seat 323 for supporting the gripper mechanism 31, the second positioning unit 321 is two with the pressing unit 322, and the supporting seat 323 is symmetrically disposed on two sides of the supporting seat 323, the supporting seat 323 is disposed at the bottom of the second positioning unit 321 and detachably connected to the second positioning unit 321.

The second positioning unit 321 is used for positioning the position of the gripper mechanism 31, so as to realize accurate positioning when the gripper mechanism 31 is butted with the second positioning mechanism 32; specifically, the position of the rolling positioning element 324 can be finely adjusted by the rolling positioning element 324 with adjustable position in the second positioning unit 321, for example, by adding a gasket to adjust the position of the rolling positioning element 324, so as to meet the requirement of high-precision positioning. The rolling positioning element 324 has good tolerance, the requirement on the machining precision can be lower compared with a rigid positioning element, and the position adjustment of the rolling positioning element 324 is utilized to realize accurate positioning; ordinary locating element generally relies on be that sliding friction realizes the location fit between the locating element, and the utility model discloses a location fit between the locating element is realized to rolling locating element 324 dependence rolling friction, and rolling frictional force weakens greatly than sliding frictional force, rolls the setting element simultaneously and changes traditional face contact into the point contact, also can make rolling frictional force weaken greatly, and less frictional force can be convenient for assemble, promotes the convenience that positioner and tongs are connected. The pressing unit 322 is used for pressing and fixing the gripper mechanism 31, so as to realize the fastening function when the second positioning mechanism 32 is connected with the gripper mechanism 31; the support base 323 corresponds to a base, and provides support for the gripper mechanism 31 so that it can be stably placed. The second positioning unit 321 and the supporting base 323, which are detachably connected, facilitate replacement and maintenance of the second positioning unit 321.

Specifically, the number of the rolling positioning elements 324 may be four, and the gripper mechanism 31 is positioned from four directions, i.e., up, down, left, and right, which are a first rolling positioning element and a second rolling positioning element for defining the up-down position of the gripper mechanism 31, and a third rolling positioning element and a fourth rolling positioning element for defining the left-right position of the gripper mechanism 31.

As an embodiment of the present invention, the gripper mechanism 31 includes a first positioning unit 311 inserted into a second positioning unit 321 to realize positioning, and a workpiece clamping unit 313 for clamping a workpiece; the number of the first positioning units 311 and the number of the workpiece clamping units 313 are two, a support plate 314 is connected between the two first positioning units 311, and the workpiece clamping units 313 are symmetrically arranged at two ends of the support plate 314 and connected with the support plate 314.

The second positioning unit 321 and the first positioning unit 311 cooperate to position the second positioning mechanism 32 and the gripper mechanism 31, specifically, the first positioning unit 311 may include a positioning substrate 12 and a positioning pin 315, and the positioning pin 315 is detachably connected to the positioning substrate 12; the positioning pin 315 is inserted into a gap formed among the first rolling positioning element, the second rolling positioning element, the third rolling positioning element and the fourth rolling positioning element, and the rolling positioning element 324 is used for limiting the up-down, left-right positions of the positioning pin 315, so that the up-down, left-right positions of the whole gripper mechanism 31 are limited. The rolling positioning element 324 can roll, compared with a common pin hole matching mode, the rolling friction is compared with sliding friction, the friction force can be greatly weakened, meanwhile, the rolling positioning element 324 is in point contact with the positioning pin 315, the rolling friction force can be further weakened, the pin blocking problem is further effectively prevented, the service life of the positioning pin 315 is prolonged, meanwhile, the assembling difficulty is reduced, the assembling efficiency and the assembling convenience are improved, in addition, the traditional pin hole matching is rigid, the requirement on the machining precision is higher, the excessive gap between the pin holes can cause inaccurate positioning, the too small gap can also greatly increase the positioning difficulty in connection, therefore, the matching of the rolling positioning element 324 and the positioning pin 315 can also reduce the machining difficulty, and the cost is reduced; furthermore, the position of the rolling positioning element 324 can be adjusted by using the spacer, so that the positioning accuracy can be realized, and the positioning error generated between the rolling positioning element 324 and the positioning pin 315 can be compensated. Preferably, the gripper mechanism 31 further includes two support blocks for abutting against the pressing unit 322 to realize that the gripper mechanism 31 is connected and fixed with the second positioning mechanism 32, the two support blocks 312 are respectively disposed at two ends of the first positioning unit 311, and the two support blocks 312 and the two pressing units 322 abut against each other to jointly realize reliable connection between the second positioning mechanism 32 and the gripper mechanism 31. The workpiece clamping unit 313 is used for clamping workpieces, because workpieces of different vehicle types are different greatly in structure and shape, in order to better realize accurate positioning and clamping of the workpieces of different vehicle types, the workpiece clamping unit 313 is uniquely arranged according to the workpieces of different vehicle types, the special part of the gripper mechanism 31 is embodied on the workpiece clamping unit 313, and the first positioning unit 311 and the support block 312 on the gripper mechanism 31 are arranged to be matched with the second positioning unit 321 and the pressing unit 322 on the second positioning mechanism 32 respectively; the manipulator applied to different vehicle models is actually used for clamping parts of different vehicle models by replacing different gripper mechanisms 31, and further by utilizing different workpiece clamping units 313 on different gripper mechanisms 31.

As an embodiment of the utility model, still include the control unit, the control unit is connected with main part location subsystem 1, middle part auxiliary stay location subsystem 2, the equal electricity of component location subsystem 3.

The control unit is used for uniformly controlling and allocating the whole flexible positioning system, is convenient for controlling the middle auxiliary supporting positioning subsystem 2, particularly the telescopic cylinder, so that the height can be adjusted to orderly position different automobile bodies according to different automobile types, and then the component positioning system is utilized to switch different gripper mechanisms 31, so that the whole automobile assembling process is realized.

As an embodiment of the present invention, the first positioning mechanism 11 may be provided with three shafts for adjusting the position of the X, Y, Z direction of the automobile body, so as to realize the positioning function of different automobile bodies.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a flexible positioning system, its characterized in that, including main part location subsystem (1) that is used for location and fixed automobile main body, be used for to automobile main body carry out auxiliary stay and can carry out height control's middle part auxiliary stay location subsystem (2), a plurality of constitution piece location subsystem (3) that are used for pressing from both sides to get and assemble car auxiliary part according to different motorcycle types, middle part auxiliary stay location subsystem (2) are located main part location subsystem (1) middle part is connected rather than, constitution piece location subsystem (3) are located main part location subsystem (1) border is rather than being connected.

2. The flexible positioning system according to claim 1, wherein the middle auxiliary supporting and positioning subsystem (2) comprises a support part (21) and a plurality of lifting positioning units (22), wherein the plurality of lifting positioning units (22) are sequentially arranged on the support part (21) and detachably connected with the support part (21).

3. The flexible positioning system according to claim 2, wherein the support portion (21) is a gantry structure.

4. The flexible positioning system according to claim 3, wherein the elevation type positioning unit (22) comprises a positioning support member, a telescopic cylinder for adjusting the height of the positioning support member, and the positioning support member is connected with the telescopic cylinder; the two lifting positioning units (22) are symmetrically arranged at two ends of the supporting part (21).

5. The flexible positioning system according to any one of claims 1 to 4, wherein the main body positioning subsystem (1) comprises a first positioning mechanism (11) for positioning the automobile main body, a base plate (12) for supporting the first positioning mechanism (11), and a plurality of adjusting legs (13) acting on the base plate (12) to adjust the six-directional position of the first positioning mechanism (11), wherein the first positioning mechanism (11) is arranged on the base plate (12) and detachably connected with the base plate (12), the plurality of adjusting legs (13) are arranged at the bottom of the base plate (12), one end of each adjusting leg is movably connected with the base plate (12), and the other end of each adjusting leg is detachably connected with the ground.

6. The flexible positioning system according to claim 5, wherein the number of the component positioning subsystems (3) is two, and the two component positioning subsystems are symmetrically arranged on two sides of the middle auxiliary supporting and positioning subsystem (2) and are fixedly connected with the base plate (12).

7. The flexible positioning system according to claim 6, wherein the component positioning subsystem (3) comprises a gripper mechanism (31) for gripping auxiliary parts of the automobile, a second positioning mechanism (32) capable of connecting different gripper mechanisms (31) after accurate positioning, and the second positioning mechanism (32) is arranged at the bottom of the gripper mechanism (31) and detachably connected with the gripper mechanism (31).

8. The flexible positioning system according to claim 7, wherein the second positioning mechanism (32) comprises a second positioning unit (321) for positioning the placing position of the gripper mechanism (31) by using a plurality of position-adjustable rolling positioning elements (324), a pressing unit (322) for pressing and fixing the gripper mechanism (31), and a support seat (323) for supporting the gripper mechanism (31), wherein the second positioning unit (321) and the pressing unit (322) are two and symmetrically arranged on two sides of the support seat (323), and the support seat (323) is arranged at the bottom of the second positioning unit (321) and detachably connected with the second positioning unit (321).

9. The flexible positioning system according to claim 8, wherein the gripper (31) comprises a first positioning unit (311) inserted into the second positioning unit (321) for positioning, a workpiece clamping unit (313) for clamping a workpiece; the number of the first positioning units (311) and the number of the workpiece clamping units (313) are two, a supporting plate (314) is connected between the two first positioning units (311), and the workpiece clamping units (313) are symmetrically arranged at two ends of the supporting plate (314) and connected with the supporting plate (314).

10. The flexible positioning system according to claim 9, further comprising a control unit electrically connected to the main body positioning subsystem (1), the middle auxiliary support positioning subsystem (2), and the component positioning subsystem (3).