A three-dimensional warehouse for switching and storing welding fixtures

Abstract

The utility model discloses a welding fixture switching storage stereoscopic warehouse, which relates to the technical field of mechanical conveying equipment, including a switching warehouse and a quick switching trolley; a pair of switching warehouses are arranged on both sides of the slide base, between the working positioning mechanism and the pair of storage warehouses located at the front; the quick switching trolley is installed on the slide base, between the working positioning mechanism and the reverse warehouse trolley; the quick switching trolley can move along the slide base, and is used to push the welding fixture into the switching warehouse or pull the welding fixture out of the switching warehouse and send it to the working positioning mechanism. The utility model increases the total number of warehouses in a multi-layer arrangement, and sets a lifting mechanism to realize the switching of welding fixtures between the upper and lower warehouses. A quick switching trolley and a switching warehouse are added to the front end of the slide base, which work independently with the storage warehouse and the reverse warehouse trolley. The reverse warehouse of the welding fixture is carried out in parallel with the welding work, so that the reverse warehouse switching of the welding fixture basically does not affect the overall production rhythm, which is conducive to improving production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical conveying equipment, in particular to a storage library for switching welding fixtures. Background Art

[0002] The multi-model fixture switching system is a mechanical conveying equipment commonly used in welding conveyor lines. It is especially used for online storage of various models of fixtures in white body welding lines, in order to achieve rapid switching of production of various models.

[0003] The application of multi-model fixture switching systems is mainly affected by the spatial layout of the production site and the production plan. In the prior art, multi-model fixture switching systems of types such as straight-line switching libraries, cross-type switching libraries, and T-type switching libraries are often classified and laid out to meet production needs. However, in the existing multi-model fixture switching systems, different vehicle fixture structures are independently set, which inevitably leads to the overall structure of the multi-model fixture switching system being cumbersome, poorly uniform, and low in overall utilization, and there is obviously room for further optimization. In particular, with the increase in the number of vehicle fixture types, the overall slide length of the multi-model fixture switching system increases, and the space occupied by the multi-model fixture switching system increases, resulting in an increase in the difficulty of production site layout and a decrease in space utilization. The increase in the overall slide length of the multi-model fixture switching system also leads to a significant increase in the switching beat, which is not conducive to improving production efficiency. Utility Model Content

[0004] The utility model is to avoid the deficiencies of the prior art and provides a welding fixture switching storage stereoscopic warehouse.

[0005] The utility model adopts the following technical solutions to solve the technical problems: a three-dimensional warehouse for switching storage of welding fixtures, a working positioning mechanism is arranged at the front end of a slide base, a reverse storage trolley which can move along the slide base is installed on the slide base, storage locations are arranged on both sides of the slide base, and also includes a switching storage location and a quick switching trolley;

[0006] A pair of switching storage positions are arranged on both sides of the slide base, between the working positioning mechanism and the frontmost pair of storage storage positions;

[0007] The quick switching trolley is installed on the slide base and is located between the working positioning mechanism and the reverse storage trolley; the quick switching trolley can move along the slide base, and is used to push the welding fixture into the switching storage position or pull the welding fixture out of the switching storage position and send it to the working positioning mechanism.

[0008] Furthermore, the switching storage location is a single-layer structure, and the storage storage locations are symmetrically arranged in pairs on both sides of the slide base, forming a multi-layer structure of at least two layers;

[0009] The storage location is also equipped with a lifting mechanism for transporting the welding fixture between the layers of the multi-layer structure.

[0010] Furthermore, the lifting mechanism includes a lifting trolley mechanism and a driving mechanism;

[0011] The lifting trolley mechanism is installed on the storage location and forms a sliding pair along the vertical direction with the frame structure; the output end of the driving mechanism is installed and connected to the lifting trolley mechanism, and the lifting trolley mechanism can move up or down under the drive of the driving mechanism.

[0012] Furthermore, the driving mechanism includes a servo motor, a sprocket mechanism and a transmission chain;

[0013] The servo motor is fixedly mounted on the frame structure, and its output end is axially coupled to the input end of the sprocket mechanism. The transmission chain serves as the output end of the driven mechanism and is mounted and connected to the lifting trolley mechanism.

[0014] Further, the storage location includes a frame structure and a linear slide rail, and the lifting trolley mechanism includes a trolley frame and a slide block;

[0015] The frame structure serves as a supporting frame for the storage location, and a pair of linear slide rails opened in the vertical direction are symmetrically arranged on the frame structure at one side close to the slide base, and the linear slide rails of the storage location arranged in pairs are symmetrically arranged on both sides of the slide base;

[0016] The trolley frame is fixedly provided with sliding blocks which are slidably mounted in the linear slide rails in a one-to-one correspondence, and the transmission chain is installed and connected with the sliding blocks.

[0017] Furthermore, in the multi-layer structure of the storage location, the second or higher storage locations are further provided with an upper support roller assembly and a traction mechanism; the lifting trolley mechanism further includes a trolley roller support assembly;

[0018] A pair of trolley roller support assemblies are symmetrically arranged on the trolley frame, and the welding fixture is placed on the pair of trolley roller support assemblies; the upper support roller assembly and the trolley roller support assembly are arranged in pairs corresponding to each other, and when the lifting trolley mechanism rises or descends to a certain position, a welding fixture channel is formed for the welding fixture to enter or leave the second floor of the storage location or the second floor and above;

[0019] The output end of the traction mechanism is detachably connected to the welding fixture, and is used to pull the welding fixture along the welding fixture channel to enter or leave the second floor of the storage location or the second floor and above.

[0020] Further, the traction mechanism includes a traction motor and a ball screw slider assembly mounted on the frame structure, and a cylinder traction structure mounted on a slider of the ball screw slider assembly;

[0021] The output end of the traction motor is installed and connected to the input end of the ball screw slider assembly, and is used to drive the screw of the ball screw slider assembly to rotate; the output end of the cylinder traction structure is a hook-shaped structure with an open face, and the output of the cylinder traction structure causes its own output end to extend out of the storage position to above the slide base or retract into the storage position until it completely enters the storage position.

[0022] Furthermore, the storage location also includes an upper positioning latch assembly; the upper positioning latch assembly is installed on the frame structure and is located on a side close to the slide base, and the latch of the upper positioning latch assembly extends out and is inserted into a corresponding positioning hole on the trolley frame when the lifting trolley mechanism rises or descends to a position, thereby locking the lifting trolley mechanism and the frame structure in a limited position;

[0023] The lifting trolley mechanism also includes a trolley positioning pin assembly; when the welding fixture is loaded into place on the lifting trolley mechanism, the pin of the trolley positioning pin assembly extends upward and is inserted into a corresponding positioning hole on the welding fixture, thereby limiting and locking the welding fixture and the lifting trolley mechanism.

[0024] Furthermore, the storage location also includes an end buffer limit assembly;

[0025] The end buffer limit assembly installed on the frame structure is provided at the end away from the slide base in the second floor or above of the storage location.

[0026] Furthermore, it also includes the offline trolley and hand chain hoist;

[0027] The offline trolley is installed on the slide base and is located behind the reverse storage trolley; the hand chain hoist is installed at the storage location.

[0028] The utility model provides a three-dimensional warehouse for switching and storing welding fixtures, which has the following beneficial effects:

[0029] 1. The utility model adds a quick switching trolley and a switching storage position at the front end of the slide base, which work independently with the storage position and the reverse storage trolley. The reverse storage of the welding fixture is carried out in parallel with the welding work, so that the reverse storage switching of the welding fixture basically does not affect the overall production rhythm, which is conducive to improving production efficiency.

[0030] 2. The utility model is based on the parallel operation of the inversion of welding fixtures and welding work, increases the total number of storage locations in a multi-layered manner, and sets a lifting mechanism to realize the switching of welding fixtures between the upper and lower storage locations. Under the premise of basically not affecting the production efficiency, the capacity of the storage stereoscopic warehouse is increased, and the layout flexibility of the storage stereoscopic warehouse is greatly improved.

[0031] 3. The utility model utilizes the offline trolley to replace, import or export the welding fixtures stored in the stereoscopic warehouse according to actual needs without affecting the switching of welding fixtures and the welding work, and can adapt to various production requirements.

[0032] 4. The utility model is convenient to maintain and repair, has a flexible layout, can be invested in stages, reduces the initial investment cost, can better meet the needs of actual production, and is conducive to improving the space utilization rate of the production site. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the utility model;

[0034] Figure 2 It is a structural schematic diagram of the slide base of the utility model;

[0035] Figure 3 This is a schematic diagram of the structure of the storage location of the utility model;

[0036] Figure 4 It is a structural schematic diagram of the driving mechanism of the utility model;

[0037] Figure 5 This is a structural diagram of the lifting trolley mechanism of the utility model;

[0038] Figure 6 It is a partial structural schematic diagram of the storage location of the utility model.

[0039] In the figure:

[0040] 1. Slide base; 2. Working positioning mechanism; 3. Quick switching trolley; 4. Reverse storage trolley; 5. Storage location, 51. Frame structure, 52. Linear slide rail, 53. Upper support roller assembly, 54. Upper positioning latch assembly, 55. Traction motor, 56. Ball screw slider assembly, 57. Cylinder traction structure, 58. End buffer limit assembly; 6. Switching storage location; 7. Lifting mechanism, 71. Servo motor, 72. Sprocket mechanism, 73. Transmission chain, 74. Trolley frame, 75. Slider, 76. Trolley roller support assembly, 77. Trolley positioning latch assembly; 8. Hand chain hoist; 9. Offline trolley. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] A welding fixture switching storage stereoscopic library, such as Figure 1 to Figure 6 As shown, the structural relationship is as follows: the working positioning mechanism 2 is arranged at the front end of the slide base 1, a storage trolley 4 which can move along the slide base 1 is installed on the slide base 1, and storage locations 5 are arranged on both sides of the slide base 1. The storage trolley 4 is used for switching welding fixtures, and can pull the welding fixtures out of the storage location, push them into the storage location, and carry the welding fixtures to slide along the slide base 1; it also includes a switching storage location 6 and a quick switching trolley 3;

[0043] A pair of switching storage positions 6 are arranged on both sides of the slide base 1, between the working positioning mechanism 2 and the pair of storage positions 5 located at the front;

[0044] The quick switching trolley 3 is installed on the slide base 1 and is located between the working positioning mechanism 2 and the reverse storage trolley 4; the quick switching trolley 3 can move along the slide base 1, and is used to push the welding fixture into the switching storage position 6 or pull the welding fixture out of the switching storage position 6 and send it to the working positioning mechanism 2.

[0045] Preferably, the switching storage location 6 is a single-layer structure, and the storage storage locations 5 are symmetrically arranged in pairs on both sides of the slide base 1, forming a multi-layer structure of at least two layers; in actual setting, the second layer or the second layer and above of the storage storage location 5 can also be set as a functional area according to actual needs, such as a maintenance platform;

[0046] The storage location 5 is also equipped with a lifting mechanism 7 for transporting the welding fixture between the layers of the multi-layer structure.

[0047] Preferably, the lifting mechanism 7 includes a lifting trolley mechanism and a driving mechanism;

[0048] The lifting trolley mechanism is installed on the storage location 5, and forms a sliding pair along the vertical direction with the frame structure; the output end of the driving mechanism is installed and connected to the lifting trolley mechanism, and the lifting trolley mechanism can move up or down under the drive of the driving mechanism.

[0049] Preferably, the driving mechanism includes a servo motor 71, a sprocket mechanism 72 and a transmission chain 73;

[0050] The servo motor 71 is fixedly mounted on the frame structure, and its output end is axially coupled to the input end of the sprocket mechanism 72. The transmission chain 73 serves as the output end of the driven mechanism and is mounted and connected to the lifting trolley mechanism.

[0051] In actual setting, the output end of the servo motor 71 is the output shaft, and the input end of the sprocket mechanism 72 is the sprocket shaft. The two can be connected by a coupling, and the sprocket shaft can be rotatably installed on the frame structure using a bearing seat.

[0052] Preferably, the storage location 5 includes a frame structure 51 and a linear slide rail 52, and the lifting trolley mechanism includes a trolley frame 74 and a slide block 75;

[0053] The frame structure 51 serves as a support frame for the storage location 5, on which a pair of linear guide rails 52 opened in the vertical direction are symmetrically arranged on one side close to the slide base 1, and the linear guide rails 52 of the storage location 5 arranged in pairs are symmetrically arranged on both sides of the slide base 1;

[0054] The trolley frame 74 is provided with sliding blocks 75 which are slidably mounted in the linear slide rail 52 , and the transmission chain 73 is installed and connected to the sliding blocks 75 .

[0055] During actual setting, the lifting trolley mechanism can also be equipped with a drag chain assembly according to actual needs;

[0056] When in use, the driving and transmission principles of the lifting or lowering action of the lifting trolley mechanism are as follows:

[0057] The servo motor 71 outputs rotation, which is transmitted through the sprocket mechanism 72 and the transmission chain 73, acts on the slider 75, and drives the lifting trolley mechanism to slide along the linear slide rail 52, thereby realizing the lifting or lowering action of the lifting trolley mechanism.

[0058] Preferably, in the multi-layer structure of the storage location 5, the second or second and above storage locations are further provided with an upper support roller assembly 53 and a traction mechanism; the lifting trolley mechanism further includes a trolley roller support assembly 76;

[0059] A pair of trolley roller support assemblies 76 are symmetrically arranged on the trolley frame 74, and the welding fixture is placed on the pair of trolley roller support assemblies 76; the upper support roller assembly 53 and the trolley roller support assembly 76 are arranged in pairs corresponding to each other, and when the lifting trolley mechanism rises or falls into place, a welding fixture channel is formed for the welding fixture to enter or leave the second floor of the storage location 5 or the second floor and above;

[0060] The output end of the traction mechanism is detachably connected to the welding fixture, and is used to pull the welding fixture along the welding fixture channel to enter or leave the second floor of the storage location 5 or the second floor and above.

[0061] Preferably, the traction mechanism includes a traction motor 55 and a ball screw slider assembly 56 mounted on the frame structure 51, and a cylinder traction structure 57 mounted on the slider of the ball screw slider assembly 56;

[0062] The output end of the traction motor 55 is installed and connected to the input end of the ball screw slider assembly 56, and is used to drive the screw of the ball screw slider assembly 56 to rotate; the output end of the cylinder traction structure 57 is a hook-shaped structure with an open face, and the cylinder traction structure 57 outputs a movement that causes its own output end to extend out of the storage position to above the slide base 1 or retract into the storage position until it is completely inside the storage position.

[0063] In actual configuration, the cylinder traction structure 57 may be a four-bar linkage mechanism with a linear cylinder as a driving machine, a front end of a first rod hinged to a frame, and a fourth rod end fixed to the frame, wherein the second rod end extends outward to form a hook-shaped structure with an opening facing upward, serving as an output end of the cylinder traction mechanism 57;

[0064] At the same time, the above-mentioned two-layer or two-layer and above storage location structure can also be applied to the first-layer storage location according to actual needs;

[0065] When used specifically, the driving and transmission principle of the storage location 5 when pulling the welding fixture into the storage is as follows:

[0066] The traction motor 55 outputs rotation, which is transmitted through the ball screw slider assembly 56, driving the cylinder traction structure 57 to move close to the welding fixture until the cylinder traction structure 57 reaches the docking position, and the cylinder is actuated to adjust the posture of the output end of the cylinder traction structure 57 so that the output end of the cylinder traction structure 57 extends toward the docking position, and the opening of the hook structure is located directly below the traction position of the welding fixture; then the lifting trolley mechanism slightly moves downward, and the hook structure hooks the traction position of the welding fixture, and the traction motor 55 outputs reverse rotation, which is transmitted through the ball screw slider assembly 56, driving the cylinder traction structure 57 to pull the welding fixture to move into the storage position;

[0067] The driving and transmission principle when the storage location 5 pushes the welding fixture out of the storage location is as follows:

[0068] The traction motor 55 outputs rotation, which is transmitted through the ball screw slider assembly 56, driving the cylinder traction structure 57 to push the welding fixture to move out of the storage position until the welding fixture is completely moved to the lifting trolley mechanism; then the lifting trolley mechanism rises and moves slightly, so that the hook structure is separated from the traction position of the welding fixture, and the cylinder is actuated to adjust the posture of the output end of the cylinder traction structure 57, so that the output end of the cylinder traction structure 57 is retracted into the storage position.

[0069] Preferably, the storage location 5 further includes an upper positioning latch assembly 54; the upper positioning latch assembly 54 is mounted on the frame structure 51 and is located on a side close to the slide base 1. When the lifting trolley mechanism rises or descends to a certain position, the latch of the upper positioning latch assembly 54 extends out and is inserted into a corresponding positioning hole on the trolley frame 74, thereby locking the lifting trolley mechanism and the frame structure 51 in a limited position;

[0070] The lifting trolley mechanism also includes a trolley positioning pin assembly 77; the pin of the trolley positioning pin assembly 77 extends upward and is inserted into a corresponding positioning hole on the welding fixture when the welding fixture is loaded into place on the lifting trolley mechanism, thereby limiting and locking the welding fixture and the lifting trolley mechanism.

[0071] Preferably, the storage location 5 further includes an end buffer limit assembly 58;

[0072] An end buffer limit assembly 58 mounted on the frame structure 51 is provided at one end of the storage location 5 on the second floor or above and away from the slide base 1 .

[0073] The end buffering and limiting assembly 58 is used to buffer and brake the storage movement of the welding fixture. In actual setting, a buffering structure composed of a spring and a limiting block can be used.

[0074] Preferably, it also includes an offline trolley 9 and a hand chain hoist 8;

[0075] The off-line trolley 9 is installed on the slide base 1 and is located behind the reverse warehouse trolley 4; the off-line trolley 9 is used for importing / exporting the welding fixtures in the storage stereoscopic warehouse, and is installed on the slide base 1 only when the import / export work of the welding fixtures in the storage stereoscopic warehouse is performed, and can be placed outside the storage stereoscopic warehouse in daily production; when the off-line trolley 9 imports / exports the welding fixtures, it is preferred that only the pair of storage locations 5 at the rearmost is directly docked with the pair of storage locations 5, and the import / export of the welding fixtures in the other storage locations 5 is realized by docking with the reverse warehouse trolley 4 and then moving to the front of the off-line trolley 9 and docking with the off-line trolley 9;

[0076] The hand chain hoist 8 is installed at the storage location 5; the hand chain hoist 8 is mainly used for the maintenance and inspection of heavy components such as the traction motor 55 and the servo motor 71. When performing maintenance and inspection of heavy components, the hand chain hoist 8 can be used to conveniently lift the heavy components to improve the efficiency and safety of the inspection work.

[0077] Example 1

[0078] The following is an example of a storage stereoscopic warehouse with two pairs of storage locations 5 and each storage location 5 is a double-layer structure to illustrate the working method of the present application. Under this setting, the storage stereoscopic warehouse has two switching locations 6 and four storage locations 5, which can meet the random switching of 10 sets of welding fixtures.

[0079] See also Figure 1 The two switching storage locations 6 are A and B, which are a row of storage locations, and the area between them is the docking position of a row of storage locations; the four storage storage locations 5 are C, D, E and F, among which C and D are two-row storage locations arranged in pairs, and the area between them is the docking position of the two-row storage locations; E and F are three-row storage locations arranged in pairs, and the area between them is the docking position of the three-row storage locations; the first-layer storage locations of the four storage storage locations 5 are C1, D1, E1 and F1, and the second-layer storage locations of the four storage storage locations 5 are C2, D2, E2 and F2.

[0080] When the production of the current model is about to end and the welding fixture of the next model is the welding fixture originally stored in the F2 warehouse (hereinafter referred to as F2 fixture, and the other abbreviations are similar), the switching of the welding fixture includes the following process:

[0081] In the first step, the reverse warehouse trolley 4 moves along the slide base 1 to the docking position of the third row of storage locations, takes out the F1 fixture, and then loads the F1 fixture and moves along the slide base 1 to the docking position of the second row of storage locations and waits.

[0082] In the second step, the lifting trolley mechanism corresponding to the three-row storage position takes out the F2 fixture, loads the F2 fixture and descends to the first floor of the docking position of the three-row storage position under the drive of the driving mechanism, sends the F2 fixture to the F1 storage position, then takes out the E1 fixture, loads the E1 fixture and rises to the second floor of the docking position of the three-row storage position under the drive of the driving mechanism, sends the E1 fixture to the F2 storage position, and completes the aerial-ground exchange of the three-row storage position fixtures. In the third step, the inverting trolley 4 moves along the slide base 1 to the docking position of the three-row storage position, sends the F1 fixture to the E1 storage position, and then takes out the F2 fixture stored in the F1 storage position at this time;

[0083] In the fourth step, the inverting trolley 4 is loaded with the F2 fixture and moves along the slide base 1 to a row of storage location docking positions, and the F2 fixture is sent to an empty one of the A and B storage locations, and the fixture originally stored therein is taken out from the other storage location;

[0084] In the fifth step, the inversion trolley 4 is loaded with fixture A or fixture B and moves along the slide base 1 to the docking position of the third row of storage locations, and the fixture A or fixture B is sent to the F1 storage location.

[0085] Step 6. After the production of the vehicle model at the work positioning mechanism 2 is completed, quickly switch the trolley 3 to take out the welding fixture at the work positioning mechanism 2, load the welding fixture at the work positioning mechanism 2 and move it to a row of storage docking positions, send the welding fixture at the work positioning mechanism 2 into one of the empty storage positions A and B, then take out the F2 fixture in the other one, load the F2 fixture and move it along the slide base 1 to the work positioning mechanism 2, send the F2 fixture to the work positioning mechanism 2, and produce the next vehicle model.

[0086] The above-mentioned welding fixture switching storage stereoscopic warehouse can meet the needs of fixture positioning, storage and switching for high-beat multi-model flexible co-production of floor sub-assemblies, four doors and two covers, side panels, floor assemblies and other workstations. It not only meets the co-production of multiple models, but also enables random switching and increases the options of single-layer and multi-layer layouts, saving more than 45% of space, and is easy to use and maintain, with standard drive and convenient import and export of new and old models.

[0087] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0088] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welding fixture switching storage stereoscopic warehouse, wherein a work positioning mechanism (2) is arranged at the front end of a slide base (1), a storage trolley (4) movable along the slide base (1) is installed on the slide base (1), and storage locations (5) are arranged on both sides of the slide base (1), characterized in that: It also includes a switching storage location (6) and a quick switching trolley (3); A pair of switching storage positions (6) are arranged on both sides of the slide base (1), and are located between the working positioning mechanism (2) and the frontmost pair of storage positions (5); The quick switching trolley (3) is installed on the slide base (1) and is located between the working positioning mechanism (2) and the reverse storage trolley (4); the quick switching trolley (3) can move along the slide base (1) and is used to push the welding fixture into the switching storage position (6) or pull the welding fixture out of the switching storage position (6) and send it to the working positioning mechanism (2).

2. According to claim 1, a welding fixture switching storage stereoscopic warehouse is characterized in that: The switching storage position (6) is a single-layer structure, and the storage storage positions (5) are symmetrically arranged in pairs on both sides of the slide base (1), forming a multi-layer structure of at least two layers; The storage location (5) is also equipped with a lifting mechanism (7) for transporting the welding fixture between the layers of the multi-layer structure.

3. According to claim 2, a welding fixture switching storage stereoscopic warehouse is characterized in that: The lifting mechanism (7) comprises a lifting trolley mechanism and a driving mechanism; The lifting trolley mechanism is installed on the storage location (5) and forms a sliding pair along the vertical direction with the frame structure; the output end of the driving mechanism is installed and connected to the lifting trolley mechanism, and the lifting trolley mechanism can move up or down under the drive of the driving mechanism.

4. The welding fixture switching storage stereoscopic warehouse according to claim 3 is characterized in that: The driving mechanism comprises a servo motor (71), a sprocket mechanism (72) and a transmission chain (73); The servo motor (71) is fixedly mounted on the frame structure, and its output end is axially coupled to the input end of the sprocket mechanism (72). The transmission chain (73) serves as the output end of the driven mechanism and is mounted and connected to the lifting trolley mechanism.

5. A welding fixture switching storage stereoscopic warehouse according to claim 4, characterized in that: The storage location (5) comprises a frame structure (51) and a linear slide rail (52), and the lifting trolley mechanism comprises a trolley frame (74) and a slide block (75); The frame structure (51) serves as a support frame for the storage location (5), and a pair of linear slide rails (52) are symmetrically arranged on the frame structure (51) on one side close to the slide base (1) and are opened in the vertical direction, and the linear slide rails (52) of the storage location (5) arranged in pairs are symmetrically arranged on both sides of the slide base (1); The trolley frame (74) is provided with sliding blocks (75) which are slidably mounted in the linear slide rail (52) in a one-to-one correspondence, and the transmission chain (73) is mounted and connected to the sliding blocks (75).

6. The welding fixture switching storage stereoscopic warehouse according to claim 5 is characterized in that: In the multi-layer structure of the storage location (5), the second-layer or higher-layer storage locations are further provided with an upper-layer support roller assembly (53) and a traction mechanism; the lifting trolley mechanism further comprises a trolley roller support assembly (76); A pair of trolley roller support assemblies (76) are symmetrically arranged on the trolley frame (74), and the welding fixture is placed on the pair of trolley roller support assemblies (76); the upper support roller assembly (53) and the trolley roller support assembly (76) are arranged in pairs corresponding to each other, and when the lifting trolley mechanism rises or descends to a position, a welding fixture channel is formed for the welding fixture to enter or leave the second floor or the second floor and above of the storage location (5); The output end of the traction mechanism is detachably connected to the welding fixture and is used to pull the welding fixture along the welding fixture channel into or out of the second floor or above of the storage location (5).

7. The welding fixture switching storage stereoscopic warehouse according to claim 6 is characterized in that: The traction mechanism comprises a traction motor (55) and a ball screw slider assembly (56) mounted on the frame structure (51), and a cylinder traction structure (57) mounted on a slider of the ball screw slider assembly (56); The output end of the traction motor (55) is connected to the input end of the ball screw slider assembly (56) for driving the screw of the ball screw slider assembly (56) to rotate; the output end of the cylinder traction structure (57) is a hook-shaped structure with an open face, and the cylinder traction structure (57) outputs a movement that causes its output end to extend out of the storage position to above the slide base (1) or to retract into the storage position until it is completely inside the storage position.

8. A welding fixture switching storage stereoscopic warehouse according to claim 6 or 7, characterized in that: The storage location (5) further comprises an upper positioning latch assembly (54); the upper positioning latch assembly (54) is mounted on the frame structure (51) and is located on a side close to the slide base (1); when the lifting trolley mechanism rises or descends to a certain position, the latch of the upper positioning latch assembly (54) extends out and snaps into a corresponding positioning hole on the trolley frame (74), thereby limiting and locking the lifting trolley mechanism and the frame structure (51); The lifting trolley mechanism also includes a trolley positioning pin assembly (77); when the welding fixture is loaded into place on the lifting trolley mechanism, the pin of the trolley positioning pin assembly (77) extends upward and snaps into a corresponding positioning hole on the welding fixture, thereby limiting and locking the welding fixture and the lifting trolley mechanism.

9. A welding fixture switching storage stereoscopic warehouse according to claim 6 or 7, characterized in that: The storage location (5) further comprises an end buffer limit assembly (58); The end buffer limit assembly (58) mounted on the frame structure (51) is provided at the end away from the slide base (1) in the second floor or above of the storage location (5).

10. The welding fixture switching storage stereoscopic warehouse according to claim 2, characterized in that: It also includes an offline trolley (9) and a hand chain hoist (8); The offline trolley (9) is installed on the slide base (1) and is located behind the reverse storage trolley (4); the hand chain hoist (8) is installed at the storage location (5).

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