Flexible switching device for clamp

Abstract

The invention discloses a flexible switching device for clamps. The flexible switching device comprises a ground positioning device, a transfer device and a switching sliding table device. The ground positioning device is fixed to the ground, located at the rear end of the switching sliding table device and used for guiding and positioning the transfer device when the transfer device reaches the butt joint position of the transfer device and the switching sliding table device. The transfer device is used for bearing the clamp and transferring the clamp to the switching sliding table device; the switching sliding table device is of a double-layer sliding table structure and is composed of a lower-layer fixed sliding table and an upper-layer switching sliding table. The mode that the double-layer sliding table is matched with the transfer device is adopted to achieve switching of the clamps, driving is achieved through the linear rodless air cylinder, a middle rod part of a traditional air cylinder does not exist, and occupied space of the whole air cylinder is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile welding fixtures, and in particular relates to a fixture flexible switching device, which can realize rapid switching of the fixture in a welding island. Background Art

[0002] With the rapid development of the automobile industry, flexible production has become an inevitable trend. It is necessary to be able to switch different fixtures at the same workstation, realize flexible welding of multiple models, and share public equipment to reduce personnel costs, equipment costs, and save workshop space. Summary of the invention

[0003] In order to solve the problem that the tooling fixtures cannot be switched and occupy a large space, the present invention uses a fixture flexible switching device to achieve the switching of fixtures in the island through the cooperation of a double-layer slide and a transfer device.

[0004] The purpose of the present invention is achieved through the following technical solutions, in conjunction with the accompanying drawings:

[0005] A flexible switching device for a clamp comprises a ground positioning device 1, a transfer device 2 and a switching slide device 3; the ground positioning device 1 is fixed on the ground and is located at the rear end of the switching slide device 3, and is used to guide and position the transfer device 2 when the transfer device 2 reaches the docking position with the switching slide device 3; the transfer device 2 is used to carry the clamp and transfer it to the switching slide device 3; the switching slide device 3 is a double-layer slide structure, consisting of a lower fixed slide 3-1 and an upper switching slide 3-2; the lower fixed slide 3-1 comprises a fixed frame 3-1-1, a guide rail bracket 3-1-2, a lower linear rodless cylinder 3-1-3, a drag chain mechanism 3-1-4, a No. 1 limit 3-1-5 and a No. 2 limit 3-1-6; the two fixed frames 3-1-1 are fixed in parallel at On the ground, each fixed frame 3-1-1 is fixed with a guide rail bracket 3-1-2, and the lower linear rodless cylinder 3-1-3 is fixed between the two fixed frames 3-1-1 and its driving direction is the same as that of the guide rail bracket 3-1-2; the drag chain mechanism 3-1-4 is installed on the outside of the guide rail bracket 3-1-2; the upper switching slide 3-2 is slidably connected to the guide rail bracket 3-1-2, and the upper switching slide 3-2 is connected to the output end of the lower linear rodless cylinder 3-1-3, and the entire upper switching slide 3-2 is driven by the lower linear rodless cylinder 3-1-3 to move along the guide rail bracket 3-1-2; the No. 1 limit 3-1-5 and the No. 2 limit 3-1-6 are respectively fixed on the front and rear ends of the lower linear rodless cylinder 3-1-3, which are used to limit the upper switching slide 3-2.

[0006] Furthermore, the upper switching slide 3-2 includes a slide frame 3-2-1, a slide conveying device 3-2-2, an upper rodless linear cylinder 3-2-3, a No. 1 locking limit cylinder 3-2-4, a No. 2 locking limit cylinder 3-2-5, a No. 1 locking cylinder 3-2-6 and a No. 2 locking cylinder 3-2-7; the slide frame 3-2-1 is slidably connected to the guide rail bracket 3-1-2 of the lower fixed slide 3-1, and is connected to the output end of the lower linear rodless cylinder 3-1-3; a plurality of the slide conveying devices 3-2-2 are arranged at intervals on both sides of the top of the slide frame 3-2-1 for conveying the transfer device 2; the upper rodless linear cylinder 3- 2-3 is fixed on the slide frame 3-2-1 and its driving direction is the same as that of the lower linear rodless cylinder 3-1-3; the No. 1 locking cylinder 3-2-6 and the No. 2 locking cylinder 3-2-7 are respectively installed on both sides of the upper rodless linear cylinder 3-2-3, and the No. 1 locking cylinder 3-2-6 is used to insert the No. 1 limit 3-1-5 or the No. 2 limit 3-1-6 of the lower fixed slide 3-1 to limit the upper switching slide 3-2, and the No. 2 locking cylinder 3-2-7 is used to cooperate with the fixture for positioning; the No. 1 locking limit cylinder 3-2-4 and the No. 2 locking limit cylinder 3-2-5 are respectively fixed at the rear end and the front end of the outer side of the slide frame 3-2-1, and are used to lock the positioning fixture.

[0007] Furthermore, the ground positioning device 1 includes a ground plate 1-1, an upper connecting plate 1-2 and a bending plate 1-3; the upper connecting plate 1-2 is fixed on the ground plate 1-1, the bending plate 1-3 is fixed on the upper connecting plate 1-2, and the bending plate 1-3 is used to guide and limit the transfer device 2.

[0008] Furthermore, the bending plate 1-3 adopts an "eight-shaped" opening form, which is used to guide and limit the guide casters 2-1-2 of the transfer device 2.

[0009] Furthermore, the transfer device 2 includes a frame 2-1, a guide mechanism 2-2, a conveying mechanism 2-3 and a locking mechanism 2-4; the guide mechanism 2-2 is fixed at the front end of the frame 2-1, and is used to dock with the switching slide device 3; a plurality of the conveying mechanisms 2-3 are arranged at intervals and fixed on the frame 2-1, and are used to convey the fixture along the workpiece feeding direction; the locking mechanism 2-4 is installed on both sides of the front end and the top of the rear end of the frame 2-1, and is used to fix the switching slide device 3 and the fixture respectively.

[0010] Furthermore, the frame 2-1 includes a main frame 2-1-1, a guide caster 2-1-2, a pushing caster 2-1-3 and a buffer block 2-1-4; fixed at the front end of the bottom of the main frame 2-1-1, used to form a guiding match with the ground device 1; the pushing caster 2-1-3 is fixed at the bottom of the main frame 2-1-1; the buffer block 2-1-4 is fixed at the rear end of the top of the main frame 2-1-1.

[0011] Furthermore, the conveying mechanism 2-3 includes a connecting plate 2-3-1 and three needle roller cam guides 2-3-2; one needle roller cam guide 2-3-2 is horizontally fixed on the connecting plate 2-3-1, and the other two needle roller cam guides 2-3-2 are vertically fixed on the connecting plate 2-3-1 and are respectively arranged on the inner and outer sides of the connecting plate 2-3-1.

[0012] Furthermore, the transfer device 2 also includes a transfer fork guard 2-5, and the transfer fork guard 2-5 is fixed at the bottom of the frame 2-1.

[0013] The working principle of the present invention is:

[0014] When the forklift delivers the transfer device with the required switching fixture to the receiving position, the transfer device is manually connected and locked with the slide switching device through the ground guide to reach the receiving position. Figure 1 The ground detection switch detects that the fixture on the transfer device is in place, and the upper rodless linear cylinder of the upper switching slide drives the locking limit cylinder to extend. After the upper rodless linear cylinder is in place, the locking cylinder extends and cooperates with the fixture to form a driving connection. The locking cylinders on both sides of the upper switching slide extend to lock the upper slide and the fixture. The upper rodless cylinder retracts to pull the fixture onto the slide switching device to the loading position, as shown. Figure 2 As shown. After it is in place, the detection switch sends a signal, and the locking cylinder extends out and locks with the lower fixed slide. Manually unlock the locking device that connects the transfer device and the slide switching device, and push it out of the workstation. At this time, the tooling fixture has been completely switched to the slide device, and the parts are loaded. After the loading is completed, the locking cylinder locked with the lower fixed slide device retracts, and the lower linear rodless cylinder drives the entire switching fixture and the upper switching slide to retract. After it is in place, the detection switch sends a signal, and the locking cylinder extends out and locks with the lower fixed slide again, and the fixture is sent to the welding position, as shown. Figure 3 As shown in the figure, the robot starts welding. The rodless cylinder saves space and can achieve a larger travel distance in a small space.

[0015] The present invention has the following beneficial effects:

[0016] The present invention adopts the form of a double-layer slide and a transfer device to realize the switching of the clamps, and is driven by a linear rodless cylinder. There is no rod part in the traditional cylinder, which reduces the overall space occupied by the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the state of the clamp flexible switching device according to an embodiment of the present invention when the slide switching device is in the connecting position;

[0019] Figure 2 It is a schematic diagram of the state of the flexible switching device for clamps according to an embodiment of the present invention when the slide switching device is in the upper position;

[0020] Figure 3 It is a schematic diagram of the state of the clamp flexible switching device according to an embodiment of the present invention when the slide switching device is in the welding position;

[0021] Figure 4 This is a schematic diagram of the axonometric structure of the flexible switching device for a clamp according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the ground positioning device according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the transfer device according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the framework structure of the transfer device according to an embodiment of the present invention;

[0025] Figure 8 It is a schematic diagram of a partially enlarged structure of a flexible switching device for a clamp of a transfer device according to an embodiment of the present invention;

[0026] Fig. 9 This is a schematic diagram of the structure of the conveying mechanism of the transfer device according to an embodiment of the present invention;

[0027] Fig.10 This is a schematic diagram of the locking mechanism structure of the transfer device according to an embodiment of the present invention;

[0028] Fig.11 This is a schematic diagram of the structure of the switching slide device according to an embodiment of the present invention;

[0029] Fig.12 This is a schematic axonometric diagram of the structure of the switching slide device according to an embodiment of the present invention;

[0030] In the figure:

[0031] 1- Ground positioning device; 2- Transfer device; 3- Switching slide device;

[0032] 1-1- Anchor plate; 1-2- Upper connecting plate; 1-3- Bending plate;

[0033] 2-1-frame; 2-2 guiding mechanism; 2-3-conveying mechanism; 2-4-locking mechanism; 2-5-transport fork guard;

[0034] 2-1-1-main frame; 2-1-2-guide casters; 2-1-3-push casters; 2-1-4-buffer block;

[0035] 2-3-1-connecting plate; 2-3-1-needle roller cam guide;

[0036] 3-1-Lower fixed slide; 3-2-Upper switching slide;

[0037] 3-3-1-fixed frame; 3-1-2-guide rail bracket; 3-1-3-lower linear rodless cylinder; 3-1-4-limit position 1; 3-1-6-limit position 2;

[0038] 3-2-1-slide frame; 3-2-2-slide conveying device; 3-2-3-upper linear rodless cylinder; 3-2-4-No. 1 locking limit cylinder; 3-2-5-No. 2 locking limit cylinder. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] 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.

[0042] Example

[0043] like Figure 4 As shown, a flexible fixture switching device is disclosed, which adopts a double-layer slide and a transfer device. It mainly includes a ground positioning device 1, a transfer device 2 and a switching slide device 3; the ground positioning device 1 is fixed on the ground and located at the rear end of the switching slide device 3, and is used to guide and position the transfer device 2 when the transfer device 2 reaches the docking position with the switching slide device 3; the transfer device 2 is used to carry the fixture and transfer it to the switching slide device 3; the switching slide device 3 is a double-layer slide structure.

[0044] like Figure 5 As shown, the ground positioning device 1 is mainly composed of a ground anchor plate 1-1, an upper connecting plate 1-2 and a bending plate 1-3; the upper connecting plate 1-2 is fixed on the ground anchor plate 1-1, the bending plate 1-3 is fixed on the upper connecting plate 1-2, and the bending plate 1-3 is used to guide and limit the guide casters 2-1-2 of the transfer device 2. The bending plate 1-3 adopts an "eight-shaped" opening form, and the guide casters 2-1-2 of the transfer device 2 first enter the guide from the large end of the "eight-shaped" opening, which is convenient for manual operation. The ground positioning device 1 mainly plays a role of a rough guide, which can more conveniently guide the transfer device and send the transfer device to the correct working position.

[0045] like Figure 6 As shown, the transfer device is a device for transferring fixtures, which is used to carry the fixtures that need to be switched, and is docked and locked with the slide device; the transfer device 2 is mainly composed of a frame 2-1, a guide mechanism 2-2, a conveying mechanism 2-3, a locking mechanism 2-4 and a transfer fork guard 2-5; the guide mechanism 2-2 is fixed at the front end of the frame 2-1, and is used to dock with the switching slide device 3; a plurality of the conveying mechanisms 2-3 are arranged at intervals and fixed on the frame 2-1, and are used to transport the fixture along the workpiece feeding direction; the locking mechanism 2-4 is installed on both sides of the front end of the frame 2-1 and the top of the rear end, and is used for positioning when the transfer device is docked with the switching slide device 3 and for docking and fixing with the fixture; the fixing is at the bottom of the frame 2-1.

[0046] like Figure 7 As shown, the frame 2-1 is the main body of the entire transfer device, which consists of four parts: a main frame 2-1-1, guide casters 2-1-2, push casters 2-1-3 and buffer blocks 2-1-4. The main frame 2-1-1 is the main body of the frame part, which mainly plays a bearing role; the guide casters 2-1-2 are fixed to the front end of the bottom of the main frame 2-1-1, and are used to form a guiding match with the ground device 1, playing a rough guiding role; the push casters 2-1-3 are fixed to the bottom of the main frame 2-1-1, and are the moving source of the transfer device; the buffer block 2-1-4 is fixed to the rear end of the top of the main frame 2-1-1, and is a switching slide device to push the fixture onto the transfer device to play a buffering role.

[0047] like Figure 8 As shown, the guide mechanism 2-2 is installed at the front end of the frame to form a "V"-shaped block with the switching slide device 3 to form a precise guide fit.

[0048] like Fig. 9 As shown, the conveying mechanism 2-3 is mainly composed of a connecting plate 2-3-1 and three needle roller cam guides 2-3-2, one needle roller cam guide 2-3-2 is horizontally fixed on the connecting plate 2-3-1, and the other two needle roller cam guides 2-3-2 are vertically fixed on the connecting plate 2-3-1 and are respectively arranged on the inner and outer sides of the connecting plate 2-3-1. The horizontally arranged needle roller cam guide can greatly reduce the friction of the horizontal movement of the switching fixture and reduce the selection of the linear cylinder in the switching slide device. The vertically arranged needle roller cam guide can reduce the friction of the horizontal movement of the switching fixture and also play a role in limiting the switching fixture in the transfer device.

[0049] like Fig.10 As shown, the locking mechanism 2-4 is a standard purchased hand clamp, which is mainly installed in two positions. Position one is installed at the joint between the transfer device and the switching slide, and is mainly used to fix the relative position of the transfer device and the switching slide device. Position two is installed on the transfer device and the clamp, and is used to fix the clamp on the transfer device.

[0050] like Figure 6 As shown, the transfer fork guard 2-5 is two foot guards made according to the spacing of the transfer forklift to facilitate long-distance transfer.

[0051] like Fig.11 , 12 As shown, the switching slide device 3 is an important component of the flexible switching of the fixture. The slide switching device is mainly composed of a lower fixed slide 3-1 and an upper switching slide 3-2; the lower fixed slide 3-1 is fixed on the ground and cooperates with the upper switching slide 3-2 to achieve flexible switching.

[0052] The lower fixed slide 3-1 is mainly composed of a fixed frame 3-1-1, a guide rail bracket 3-1-2, a lower linear rodless cylinder 3-1-3, a drag chain mechanism 3-1-4, a first limit 3-1-5 and a second limit 3-1-6; the two fixed frames 3-1-1 are fixed in parallel on the ground, each fixed frame 3-1-1 is fixed with a guide rail bracket 3-1-2, the lower linear rodless cylinder 3-1-3 is fixed between the two fixed frames 3-1-1 and its driving direction is the same as that of the guide rail bracket 3-1-2, and both are fed along the workpiece Direction setting; the drag chain mechanism 3-1-4 is installed on the outside of the guide rail bracket 3-1-2; the upper switching slide 3-2 is slidably connected to the guide rail bracket 3-1-2, and the upper switching slide 3-2 is connected to the output end of the lower linear rodless cylinder 3-1-3, and the lower linear rodless cylinder 3-1-3 drives the entire upper switching slide 3-2 to move along the guide rail bracket 3-1-2; the No. 1 limit 3-1-5 and the No. 2 limit 3-1-6 are respectively fixed on the front and rear ends of the lower linear rodless cylinder 3-1-3, which are used to limit the upper switching slide 3-2.

[0053] The upper switching slide 3-2 is mainly composed of a slide frame 3-2-1, a slide conveying device 3-2-2, an upper rodless linear cylinder 3-2-3, a No. 1 locking limit cylinder 3-2-4, a No. 2 locking limit cylinder 3-2-5, a No. 1 locking cylinder 3-2-6 and a No. 2 locking cylinder 3-2-7; the slide frame 3-2-1 is slidably connected to the guide rail bracket 3-1-2 of the lower fixed slide 3-1, and is connected to the output end of the lower linear rodless cylinder 3-1-3; a plurality of the slide conveying devices 3-2-2 are arranged at intervals on both sides of the top of the slide frame 3-2-1, and are used to convey the transfer device 2, and the slide conveying device 3-2-2 structure is consistent with the conveying mechanism 2-3 structure The same; the upper rodless linear cylinder 3-2-3 is fixed on the slide frame 3-2-1 and its driving direction is the same as that of the lower linear rodless cylinder 3-1-3; the No. 1 locking cylinder 3-2-6 and the No. 2 locking cylinder 3-2-7 are respectively installed on both sides of the upper rodless linear cylinder 3-2-3, and the No. 1 locking cylinder 3-2-6 is used to insert the No. 1 limit 3-1-5 or the No. 2 limit 3-1-6 of the lower fixed slide 3-1 to limit the upper switching slide 3-2; the No. 2 locking cylinder 3-2-7 is used for positioning in cooperation with the fixture; the No. 1 locking limit cylinder 3-2-4 and the No. 2 locking limit cylinder 3-2-5 are respectively fixed at the rear end and the front end of the outer side of the slide frame 3-2-1, and are used to lock the positioning fixture.

[0054] The working principle of the switching slide device 3 is:

[0055] The lower linear rodless cylinder 3-1-3 drives the entire upper switching slide 3-2 to extend. After it is in place, the detection switch sends a signal to detect that the upper slide is in place. The No. 1 locking cylinder 3-2-6 extends and inserts into the No. 2 limit 3-1-6 to form a limit and lock the upper slide; when it reaches the loading position, a feedback signal is fed back, and the transfer device 2 with a clamp can be manually pushed to cooperate with the upper switching slide 3-2 and lock the locking mechanism 2-4, such as Fig.10 As shown in position 1; the locking mechanism of the clamp and the transfer device is opened, as shown in Fig.10 As shown in position 2. The operator presses the button after the material outlet. At this time, the upper slide receives the command, the No. 1 locking cylinder 3-2-6 retracts, and the linear rodless cylinder 3-2-3 of the upper switching slide extends. After it is in place, the detection switch sends a signal, the No. 2 locking cylinder 3-2-7 extends to cooperate with the positioning hole in the BASE plate of the switching fixture, and the No. 1 locking limit cylinder 3-2-4 and the No. 2 locking limit cylinder 3-2-5 extend the positioning fixture. After reaching the receiving position, the signal is received, the upper rodless linear cylinder 3-2-3 retracts and brings the fixture to be switched to the loading position, the No. 1 locking cylinder 3-2-6 extends, and the manual receives the command to load the workpiece. After loading the workpiece, the operator presses the button at the material outlet, the switching slide receives the command, the No. 1 locking cylinder 3-2-6 retracts, the lower linear rodless cylinder 3-1-3 retracts, and the fixture is brought to the welding position, and the No. 1 locking cylinder 3-2-6 extends. The robot starts welding, and after welding, it issues a command, and the entire slide switching device enters the next cycle.

[0056] The working principle of this embodiment is:

[0057] When the forklift delivers the transfer device with the required switching fixture to the receiving position, the transfer device is manually connected and locked with the slide switching device through the ground guide to reach the receiving position. Figure 1 The ground detection switch detects that the fixture on the transfer device is in place, and the upper rodless linear cylinder of the upper switching slide drives the locking limit cylinder to extend. After the upper rodless linear cylinder is in place, the locking cylinder extends and cooperates with the fixture to form a driving connection. The locking cylinders on both sides of the upper switching slide extend to lock the upper slide and the fixture. The upper rodless cylinder retracts to pull the fixture onto the slide switching device to the loading position, as shown. Figure 2 As shown. After it is in place, the detection switch sends a signal, and the locking cylinder extends out and locks with the lower fixed slide. Manually unlock the locking device that connects the transfer device and the slide switching device, and push it out of the workstation. At this time, the tooling fixture has been completely switched to the slide device, and the parts are loaded. After the loading is completed, the locking cylinder locked with the lower fixed slide device retracts, and the lower linear rodless cylinder drives the entire switching fixture and the upper switching slide to retract. After it is in place, the detection switch sends a signal, and the locking cylinder extends out and locks with the lower fixed slide again, and the fixture is sent to the welding position, as shown. Figure 3As shown in the figure, the robot starts welding. The rodless cylinder saves space and can achieve a larger travel distance in a small space.

[0058] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the protection scope of the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention. These simple variations all belong to the protection scope of the present invention.

Claims

1. A fixture flexible switching device, characterized in that: The invention comprises a ground positioning device (1), a transfer device (2) and a switching slide device (3); the ground positioning device (1) is fixed on the ground and located at the rear end of the switching slide device (3), and is used to guide and position the transfer device (2) when the transfer device (2) reaches the docking position with the switching slide device (3); the transfer device (2) is used to carry the fixture and transfer it to the switching slide device (3); the switching slide device (3) is a double-layer slide structure, consisting of a lower fixed slide (3-1) and an upper switching slide (3-2); the lower fixed slide (3-1) comprises a fixed frame (3-1-1), a guide rail bracket (3-1-2), a lower linear rodless cylinder (3-1-3), a drag chain mechanism (3-1-4), a first limiter (3-1-5) and a second limiter (3-1-6); the two fixed frames (3-1-1) are fixed on the ground in parallel. A guide rail bracket (3-1-2) is fixed on each fixed frame (3-1-1); a lower linear rodless cylinder (3-1-3) is fixed between the two fixed frames (3-1-1) and its driving direction is the same as that of the guide rail bracket (3-1-2); a drag chain mechanism (3-1-4) is installed on the outside of the guide rail bracket (3-1-2); the upper switching slide (3-2) is slidably connected to the guide rail bracket (3-1-2) The upper switching slide (3-2) is connected to the output end of the lower linear rodless cylinder (3-1-3), and the lower linear rodless cylinder (3-1-3) drives the entire upper switching slide (3-2) to move along the guide rail bracket (3-1-2); the first limiter (3-1-5) and the second limiter (3-1-6) are respectively fixed to the front and rear ends of the lower linear rodless cylinder (3-1-3) to limit the upper switching slide (3-2).

2. A fixture flexible switching device as claimed in claim 1, characterized in that: The upper switching slide (3-2) comprises a slide frame (3-2-1), a slide conveying device (3-2-2), an upper rodless linear cylinder (3-2-3), a No. 1 locking limit cylinder (3-2-4), a No. 2 locking limit cylinder (3-2-5), a No. 1 locking cylinder (3-2-6) and a No. 2 locking cylinder (3-2-7); the slide frame (3-2-1) is slidably connected to the guide rail bracket (3-1-2) of the lower fixed slide (3-1), and is connected to the output end of the lower linear rodless cylinder (3-1-3); a plurality of the slide conveying devices (3-2-2) are arranged at intervals and installed on both sides of the top of the slide frame (3-2-1) for conveying the transfer device (2); the upper rodless linear cylinder (3-2- 3) is fixed on the slide frame (3-2-1) and its driving direction is the same as that of the lower linear rodless cylinder (3-1-3); a No. 1 locking cylinder (3-2-6) and a No. 2 locking cylinder (3-2-7) are respectively installed on both sides of the upper rodless linear cylinder (3-2-3), the No. 1 locking cylinder (3-2-6) is used to insert the No. 1 limiter (3-1-5) or the No. 2 limiter (3-1-6) of the lower fixed slide (3-1) to limit the upper switching slide (3-2), and the No. 2 locking cylinder (3-2-7) is used to cooperate with the fixture for positioning; the No. 1 locking limiter cylinder (3-2-4) and the No. 2 locking limiter cylinder (3-2-5) are respectively fixed on the outer rear end and front end of the slide frame (3-2-1) to lock the positioning fixture.

3. A fixture flexible switching device as claimed in claim 1, characterized in that: The ground positioning device (1) comprises a base plate (1-1), an upper connecting plate (1-2) and a bending plate (1-3); the upper connecting plate (1-2) is fixed on the base plate (1-1), the bending plate (1-3) is fixed on the upper connecting plate (1-2), and the bending plate (1-3) is used to guide and limit the transfer device (2).

4. A fixture flexible switching device as claimed in claim 3, characterized in that: The bending plate (1-3) adopts an "eight-shaped" opening form and is used to guide and limit the guide casters (2-1-2) of the transfer device (2).

5. A fixture flexible switching device as claimed in claim 1, characterized in that: The transfer device (2) comprises a frame (2-1), a guide mechanism (2-2), a conveying mechanism (2-3) and a locking mechanism (2-4); the guide mechanism (2-2) is fixed at the front end of the frame (2-1) and is used to dock with the switching slide device (3); a plurality of the conveying mechanisms (2-3) are arranged at intervals and fixed on the frame (2-1) and are used to convey the fixture along the workpiece feeding direction; the locking mechanism (2-4) is installed on both sides of the front end and the top of the rear end of the frame (2-1) and is used to fix the switching slide device (3) and the fixture respectively.

6. A fixture flexible switching device as claimed in claim 5, characterized in that: The frame (2-1) comprises a main frame (2-1-1), a guide caster (2-1-2), a push caster (2-1-3) and a buffer block (2-1-4); the push caster (2-1-3) is fixed to the front end of the bottom of the main frame (2-1-1) and is used to form a guide match with the ground device (1); the push caster (2-1-3) is fixed to the bottom of the main frame (2-1-1); and the buffer block (2-1-4) is fixed to the rear end of the top of the main frame (2-1-1).

7. A fixture flexible switching device as claimed in claim 5, characterized in that: The conveying mechanism (2-3) comprises a connecting plate (2-3-1) and three needle roller cam guides (2-3-2); one needle roller cam guide (2-3-2) is horizontally fixed on the connecting plate (2-3-1), and the other two needle roller cam guides (2-3-2) are vertically fixed on the connecting plate (2-3-1) and are respectively arranged on the inner and outer sides of the connecting plate (2-3-1).

8. A fixture flexible switching device as claimed in claim 5, characterized in that: The transfer device (2) also includes a transfer fork guard (2-5), and the transfer fork guard (2-5) is fixed to the bottom of the frame (2-1).

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