Positioning pin switching device and machine type automatic switching system

Abstract

The utility model relates to the technical field of positioning pins, in particular to a positioning pin switching device and a machine type automatic switching system so as to achieve automatic switching of different positioning pins. The device comprises a first positioning pin, a second positioning pin, a first guide plate, a second guide plate and a driving unit, the first positioning pin is in sliding connection with the first guide plate, and the first positioning pin is provided with a jacking station and a falling station relative to the first guide plate; the second positioning pin is in sliding connection with the second guide plate, and the second positioning pin is provided with a jacking station and a falling station relative to the second guide plate; when the first positioning pin is located at a jacking station, the second positioning pin is located at a falling station; when the first positioning pin is located at the falling-back station, the second positioning pin is located at the jacking station; the driving unit is in transmission connection with the first guide plate and the second guide plate and used for driving the first guide plate and the second guide plate to do synchronous linear motion so as to drive the first positioning pin and the second positioning pin to be switched between the jacking station and the falling station in the respective axis direction.

Description

Technical Field

[0001] The present application relates to the technical field of positioning pins, and in particular to a positioning pin switching device and an automatic machine type switching system. Background Art

[0002] As a common positioning device in the production process, the positioning pin is used to switch between different types of equipment, which is of great significance for realizing flexible production. For example, when trial-producing a new diesel engine product, it is necessary to press-fit the cylinder liners of five types and measure the protrusion of the cylinder liners. The cylinder liners of the five types are positioned by at least two positioning pins, and the size, position and size of the two positioning pins are inconsistent. The process requires the automatic switching of the corresponding positioning pins after identifying the model, so as to realize the automation of the production process.

[0003] The prior art is to manually replace corresponding positioning pins according to different machine models to achieve machine model switching. Manual replacement of positioning pins must be carried out by stopping the machine, wherein the positioning pins are usually installed on positioning columns (blocks). When replacing the positioning pins, the positioning pins are manually inserted into the positioning holes of the positioning columns, and then the positioning pins are locked by the locking mechanism. The whole process is manually involved, and the first product needs to be tested after the switching is completed. Continuous production of equipment and mixed-line production of models cannot be achieved, and the production efficiency is low, the manual participation time is long, and the production process is cumbersome. Utility Model Content

[0004] The present application discloses a positioning pin switching device and a machine type automatic switching system to solve the problems of low production efficiency and complicated production process of the existing manual switching of positioning pins.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] In the first aspect, the present application provides a positioning pin switching device, which includes a first positioning pin, a second positioning pin, a first guide plate, a second guide plate and a driving unit; the first positioning pin is slidably connected to the first guide plate, and the first positioning pin has a lifting position and a falling position relative to the first guide plate; the second positioning pin is slidably connected to the second guide plate, and the second positioning pin has a lifting position and a falling position relative to the second guide plate; when the first positioning pin is in the lifting position, the second positioning pin is in the falling position; when the first positioning pin is in the falling position, the second positioning pin is in the lifting position; the driving unit is transmission-connected to both the first guide plate and the second guide plate, and is used to drive the first guide plate and the second guide plate to move linearly synchronously, so as to drive the first positioning pin and the second positioning pin to switch between the lifting position and the falling position along their respective axial directions.

[0007] Further, a first guide assembly is provided between the first positioning pin and the first guide plate; the first guide assembly includes a first guide groove and a first guide rail slidably matched with the first guide groove, and the extension direction of the first guide rail forms an acute angle α1 with the axial direction of the first positioning pin, α1>0; wherein the first guide groove is provided on the first positioning pin, and the first guide rail is provided on the first guide plate; or, the first guide groove is provided on the first guide plate, and the first guide rail is provided on the first positioning pin;

[0008] And / or, a second guide assembly is provided between the second positioning pin and the second guide plate; the second guide assembly includes a second guide groove and a second guide rail slidably matched with the second guide groove, and the extension direction of the second guide rail forms an acute angle α2 with the axial direction of the second positioning pin, α2>0; wherein, the second guide groove is provided on the second positioning pin, and the second guide rail is provided on the second guide plate; or, the second guide groove is provided on the second guide plate, and the second guide rail is provided on the second positioning pin.

[0009] Further, the positioning pin switching device also includes a first positioning bottom shaft, the first positioning pin is fixedly arranged on the first positioning bottom shaft; a first guide assembly is arranged between the first positioning bottom shaft and the first guide plate; the first guide assembly includes a first guide groove, and a first guide rail slidably matched with the first guide groove, and the extension direction of the first guide rail forms an acute angle α1 with the axial direction of the first positioning pin, α1>0; wherein the first guide groove is arranged on the first positioning bottom shaft, and the first guide rail is arranged on the first guide plate; or, the first guide groove is arranged on the first guide plate, and the first guide rail is arranged on the first positioning bottom shaft;

[0010] And / or, the positioning pin switching device also includes a second positioning base shaft, and the second positioning pin is fixed on the second positioning base shaft; a second guide assembly is provided between the second positioning base shaft and the second guide plate; the second guide assembly includes a second guide groove, and a second guide rail slidably matched with the second guide groove, and the extension direction of the second guide rail forms an acute angle α2 with the axial direction of the second positioning pin, α2>0; wherein, the second guide groove is provided on the second positioning base shaft, and the second guide rail is provided on the second guide plate; or, the second guide groove is provided on the second guide plate, and the second guide rail is provided on the second positioning base shaft.

[0011] Furthermore, α 1＝ α1, and 0<α1≤35°.

[0012] Furthermore, the positioning pin switching device also includes a guide plate base, and the first guide plate and the second guide plate are both fixedly mounted on the guide plate base; the driving unit is transmission-connected to the guide plate base, and is used to drive the guide plate base to move along a first direction, so as to drive the first guide plate and the second guide plate to move along the first direction, wherein the first direction is perpendicular to the axial direction of the first positioning pin, and the axial direction of the first positioning pin is parallel to the axial direction of the second positioning pin.

[0013] Furthermore, along the radial direction of the first positioning pin, the gap between the inner wall of the first guide groove and the first guide rail is less than or equal to 0.1 mm to limit the rotation of the first positioning pin; along the radial direction of the second positioning pin, the gap between the inner wall of the second guide groove and the second guide rail is less than or equal to 0.1 mm to limit the rotation of the second positioning pin.

[0014] Furthermore, the positioning pin switching device also includes a first guide sleeve sleeved on the first positioning pin and a second guide sleeve sleeved on the second positioning pin; the first guide sleeve is used to limit the first positioning pin to only reciprocate along the axial direction of the first positioning pin, and the second guide sleeve is used to limit the second positioning pin to only reciprocate along the axial direction of the second positioning pin.

[0015] In the second aspect, the present application provides an automatic machine model switching system, which includes a first machine model device, a second machine model device, and a positioning pin switching device as in the first aspect. When the first positioning pin is in the lifting position, the first machine model device performs production, and when the second positioning pin is in the lifting position, the second machine model device performs production.

[0016] Furthermore, the number of first positioning pins and first guide plates corresponding to the first model device is at least two, and the number of second positioning pins and second guide plates corresponding to the second model device is at least two.

[0017] Furthermore, the automatic machine model switching system also includes a first sensor and a second sensor arranged on the driving unit, the first sensor is used to monitor whether the first positioning pin is in the lifting position, and the second sensor is used to monitor whether the second positioning pin is in the lifting position.

[0018] The positioning pin switching device provided in the present application, wherein a driving unit drives a first guide plate to move linearly so that the first positioning pin is in a lifting position or a falling position, that is, the first positioning pin is in a positioning state or a released positioning state; at the same time, the driving unit drives a second guide plate to move linearly so that the second positioning pin is in a lifting position or a falling position, that is, the second positioning pin is in a positioning state or a released positioning state; and, when the first positioning pin is in the lifting position, the second positioning pin is in the falling position; when the first positioning pin is in the falling position, the second positioning pin is in the lifting position. Therefore, the positioning pin switching device in the present application can realize automatic switching between the first positioning pin and the second positioning pin, save manpower, and help improve production efficiency.

[0019] The model automatic switching system provided by the present application includes a positioning pin switching device of the first aspect. When the first positioning pin is in the lifting position, the first model equipment is in production. When the second positioning pin is in the lifting position, the second model equipment is in production. Therefore, the model automatic switching system can realize automatic replacement of different models of equipment through automatic switching of the first positioning pin and the second positioning pin without stopping the line, which can save time for changing tooling and positioning pins during production changeover, has high production efficiency and high automation level. In addition, there is no need for first-piece verification after switching different models of equipment, which simplifies the production process and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a positioning pin switching device according to an embodiment of the present application;

[0021] Figure 2 This is a structural schematic diagram of a positioning pin switching device according to another embodiment of the present application;

[0022] Figure 3 This is a schematic structural diagram of a first positioning pin and a first guide plate in sliding connection with each other in one embodiment of the present application;

[0023] Figure 4 A side view of a sliding connection between a first positioning pin and a first guide plate according to an embodiment of the present application;

[0024] Figure 5 A cross-sectional view of a first positioning pin according to an embodiment of the present application;

[0025] Figure 6 This is a cross-sectional view of a second positioning pin according to an embodiment of the present application.

[0026] Reference numerals: 100 - first positioning pin; 200 - second positioning pin; 300 - first guide plate; 310 - first guide groove; 400 - second guide plate; 410 - second guide groove; 500 - driving unit; 600 - first guide sleeve; 700 - second guide sleeve; 800 - guide plate base; 900 - connecting piece;

[0027] 01-First lubricating oil channel; 02-Second lubricating oil channel. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] Figure 1This is a schematic structural diagram of a positioning pin switching device according to an embodiment of the present application. Figure 2 This is a schematic structural diagram of a positioning pin switching device according to another embodiment of the present application. Figure 3 This is a schematic diagram of the sliding connection structure between the first positioning pin and the first guide plate of an embodiment of the present application, referring to Figures 1 to 3 In an embodiment of the present application, a positioning pin switching device is provided, which includes a first positioning pin 100, a second positioning pin 200, a first guide plate 300, a second guide plate 400 and a driving unit 500; the first positioning pin 100 is slidably connected to the first guide plate 300, and the first positioning pin 100 has a lifting position and a falling position relative to the first guide plate 300; the second positioning pin 200 is slidably connected to the second guide plate 400, and the second positioning pin 200 has a lifting position relative to the second guide plate 400 and falling positions; when the first positioning pin 100 is in the lifting position, the second positioning pin 200 is in the falling position; when the first positioning pin 100 is in the falling position, the second positioning pin 200 is in the lifting position; the driving unit 500 is transmission-connected with both the first guide plate 300 and the second guide plate 400, and is used to drive the first guide plate 300 and the second guide plate 400 to move linearly synchronously, so as to drive the first positioning pin 100 and the second positioning pin 200 to switch between the lifting position and the falling position respectively along their respective axial directions.

[0030] Among them, when the locating pin is used to fix the component, the lifting station corresponds to the locating state of the locating pin, and the falling station corresponds to the positioning release state of the locating pin; conversely, when the falling station corresponds to the locating state of the locating pin, the lifting station corresponds to the positioning release state of the locating pin.

[0031] Continue to refer to Figures 1 to 3 A first guide assembly is provided between the first positioning pin 100 and the first guide plate 300; the first guide assembly includes a first guide groove 310 and a first guide rail slidably matched with the first guide groove 310, and the extension direction of the first guide rail forms an acute angle α1 with the axial direction of the first positioning pin 100, α1>0. Figure 3 As shown, the first guide groove 310 is provided on the first positioning pin 100 , and the first guide rail is provided on the first guide plate 300 ; or, the first guide groove 310 is provided on the first guide plate 300 , and the first guide rail is provided on the first positioning pin 100 .

[0032] The first guide rail and the first guide plate 300 may be assembled or integrally formed. It is understandable that the specific structure of the first guide rail is not limited in the present application, as long as the sliding connection between the first guide plate 300 and the first positioning pin 100 is achieved through the sliding connection between the first guide groove 310 and the first guide rail. Figure 3As shown, when the first guide rail is provided on the first guide plate 300 , the first guide rail may be a partial surface of the first guide plate 300 .

[0033] Similarly, a second guide assembly is provided between the second positioning pin 200 and the second guide plate 400; the second guide assembly includes a second guide groove 410 and a second guide rail slidably matched with the second guide groove 410, and the extension direction of the second guide rail forms an acute angle α2 with the axial direction of the second positioning pin 200, α2>0. The second guide groove 410 is provided on the second positioning pin 200, and the second guide rail is provided on the second guide plate 400; or the second guide groove 410 is provided on the second guide plate 400, and the second guide rail is provided on the second positioning pin 200.

[0034] The second guide rail and the second guide plate 400 may be assembled or integrally formed. It is understandable that the specific structure of the second guide rail is not limited in the present application, as long as the sliding connection between the first guide plate 300 and the first positioning pin 100 is achieved through the sliding connection between the second guide groove 410 and the second guide rail, wherein when the second guide rail is provided with the second guide plate 400, the second guide rail may be a partial surface of the second guide plate 400.

[0035] The first guide groove 310 is directly provided on the first positioning pin 100 or the first guide plate 300, and the second guide groove 410 is directly provided on the second positioning pin 200 or the second guide plate 400, which can save space and better adapt to a narrow working space. Moreover, the structure of the above device is stable and simple, occupies little space, can realize one-time assembly of the positioning pin without replacement, and has high repeated positioning accuracy.

[0036] As another optional embodiment, the positioning pin switching device also includes a first positioning base shaft (not shown in the figure), and the first positioning pin 100 is fixedly arranged on the first positioning base shaft; a first guide assembly is arranged between the first positioning base shaft and the first guide plate 300; the first guide assembly includes a first guide groove 310, and a first guide rail slidably matched with the first guide groove 310, and the extension direction of the first guide rail forms an acute angle α1 with the axial direction of the first positioning pin 100, α1>0; wherein, the first guide groove 310 is arranged on the first positioning base shaft, and the first guide rail is arranged on the first guide plate 300; or, the first guide groove 310 is arranged on the first guide plate 300, and the first guide rail is arranged on the first positioning base shaft.

[0037] Among them, the specific structure of the first positioning bottom shaft is not limited in the present application, as long as the first positioning bottom shaft is fixedly connected to the first positioning pin 100, that is, the first guide plate 300 can drive the first positioning pin 100 to move along its axial direction by driving the first positioning bottom shaft to move linearly.

[0038] Similarly, the positioning pin switching device also includes a second positioning base shaft (not shown in the figure), and the second positioning pin 200 is fixedly arranged on the second positioning base shaft; a second guide assembly is arranged between the second positioning base shaft and the second guide plate 400; the second guide assembly includes a second guide groove 410, and a second guide rail slidably matched with the second guide groove 410, and the extension direction of the second guide rail forms an acute angle α2 with the axial direction of the second positioning pin 200, α2>0; wherein, the second guide groove 410 is arranged on the second positioning base shaft, and the second guide rail is arranged on the second guide plate 400; or, the second guide groove 410 is arranged on the second guide plate 400, and the second guide rail is arranged on the second positioning base shaft.

[0039] Among them, the specific structure of the second positioning bottom shaft is not limited in this application, as long as the second positioning bottom shaft is fixedly connected to the second positioning pin, that is, the second guide plate can drive the second positioning pin to move along its axial direction by driving the second positioning bottom shaft to move linearly.

[0040] Preferably, the first positioning pin is detachably connected to the first positioning bottom shaft, and the second positioning pin is detachably connected to the second positioning bottom shaft, so as to facilitate replacement of the positioning pins.

[0041] Figure 4 This is a side view of the sliding connection between the first positioning pin and the first guide plate of an embodiment of the present application, referring to Figure 2 and Figure 4 Along the radial direction of the first positioning pin 100, the gap between the inner wall of the first guide groove 310 and the first guide rail is less than or equal to 0.1 mm to limit the rotation of the first positioning pin 100; similarly, along the radial direction of the second positioning pin 200, the gap between the inner wall of the second guide groove 410 and the second guide rail is less than or equal to 0.1 mm to limit the rotation of the second positioning pin 200.

[0042] Reference Figure 1 and Figure 2 The positioning pin switching device also includes a first guide sleeve 600 sleeved on the first positioning pin 100 and a second guide sleeve 700 sleeved on the second positioning pin 200; the first guide sleeve 600 is used to limit the first positioning pin 100 to only reciprocate along the axial direction of the first positioning pin 100, and the second guide sleeve 700 is used to limit the second positioning pin 200 to only reciprocate along the axial direction of the second positioning pin 200.

[0043] Figure 5 This is a cross-sectional view of a first positioning pin of an embodiment of the present application, referring to Figure 5The first locating pin 100 is provided with a first lubricating oil channel 01, and the chambers of the first guide groove 310 and the first guide sleeve 600 are connected to the first lubricating oil channel 01, thereby ensuring the lubrication of the first locating pin 100 itself and between the first locating pin 100 and the first guide plate 300, which is beneficial to improving the smoothness and accuracy of the movement of the first locating pin 100.

[0044] Figure 6 This is a cross-sectional view of a second positioning pin of an embodiment of the present application, referring to Figure 6 The second locating pin 200 is provided with a second lubricating oil channel 02, and the chambers of the second guide groove 410 and the second guide sleeve 700 are connected to the second lubricating oil channel 02, thereby ensuring the lubrication of the second locating pin 200 itself and between the second locating pin 200 and the second guide plate 400, which is beneficial to improving the smoothness and accuracy of the movement of the second locating pin 200.

[0045] Exemplarily, the driving unit includes but is not limited to a cylinder, an oil cylinder, a screw or a motor. The driving unit includes a first driving member and a second driving member, the first driving member is connected to the first guide plate in a transmission manner, and is used to drive the first guide plate to move linearly, thereby driving the first positioning pin to switch between the lifting position and the falling position along its axial direction. The second driving member is connected to the second guide plate in a transmission manner, and is used to drive the second guide plate to move linearly, thereby driving the second positioning pin to switch between the lifting position and the falling position along its axial direction.

[0046] Among them, the first driving member and the second driving member can be set separately or integrated into the same component, such as a driving component, the driving component includes a first output end and a second output end, the first output end drives the first guide plate to perform linear motion, and the second guide plate drives the second guide plate to perform linear motion.

[0047] As another optional embodiment, the driving unit is provided with at least one output end, and the output end is transmission-connected to the first guide plate and the second guide plate at the same time, so as to drive the first guide plate and the second guide plate to move linearly synchronously.

[0048] Reference Figure 2 The positioning pin switching device also includes a guide plate base 800, and the first guide plate 300 and the second guide plate 400 are both fixed to the guide plate base 800; the driving unit 500 is transmission-connected to the guide plate base 800, and is used to drive the guide plate base 800 to move along a first direction, so as to drive the first guide plate 300 and the second guide plate 400 to move along the first direction, wherein the first direction is perpendicular to the axial direction of the first positioning pin 100, and the axial direction of the first positioning pin 100 is parallel to the axial direction of the second positioning pin 200.

[0049] Specifically, the positioning pin switching device in the present application also includes a first guide rail extending along a first direction, and the guide plate base is slidably connected to the first guide rail.

[0050] Continue to refer to Figure 2 The first guide plate 300 and the second guide plate 400 are disposed on the same side of the guide plate base 800, and the ends of the first guide plate 300 and the second guide plate 400 that are close to each other are flush. 1＝ α2, so that when the driving unit 500 drives the first guide plate 300 and the second guide plate 400 to move linearly synchronously, the first locating pin 100 and the second locating pin 200 move the same distance along their respective axial directions. Therefore, when the sizes of the first locating pin 100 and the second locating pin 200 are the same, automatic switching of the first locating pin 100 and the second locating pin 200 can be achieved.

[0051] It can be understood that the angles of α1 and α2 are determined by the stroke of the drive unit 500 and the lifting height of the positioning pin. Preferably, 0<α 1＝ α2≤35°.

[0052] Continue to refer to Figure 2 The first guide plate 300, the second guide plate 400 and the driving unit 500 are all connected via a connecting member 900, and the connecting member 900 may be a connecting rod, a connecting block, or the like.

[0053] Based on the same concept, an embodiment of the present application also provides an automatic machine model switching system, which includes a first machine model device, a second machine model device, and a positioning pin switching device as in the first aspect. When the first positioning pin 100 is in the lifting position, the first machine model device performs production, and when the second positioning pin 200 is in the lifting position, the second machine model device performs production.

[0054] Because it includes the locating pin switching device in the present application, the automatic switching system of this model can realize automatic replacement of different models of equipment through automatic switching of the first locating pin and the second locating pin, without the need for first-piece verification each time the model is changed, thereby simplifying the production process and improving production efficiency.

[0055] In an optional embodiment of the present application, the number of first positioning pins and first guide plates corresponding to the first model device is at least two, and the number of second positioning pins and second guide plates corresponding to the second model device is at least two, and the specific settings are made according to actual needs.

[0056] like Figure 2As shown, the number of the first locating pin 100, the first guide plate 300, the second locating pin 200, and the second guide plate 400 are all two, wherein the two first locating pins 100 correspond to the first model equipment, and the two second locating pins 200 correspond to the second model equipment. The driving unit 500 may be a double-rod cylinder, the connecting member 900 includes a first connecting rod and a second connecting rod, and the double-rod cylinder includes a first output end and a second output end. Optionally, the first locating pin 100 and the second locating pin 200 are both arranged on the guide plate base 800, and the number of the guide plate base 800 is also two, the first output end is connected to one of the guide plate bases 800 through the first connecting rod, and the second output end is connected to the other guide plate base 800 through the second connecting rod. Therefore, the double-rod cylinder can simultaneously drive the two guide plate bases 800 to move in the first direction, so that the two first locating pins 100 and the two second locating pins 200 each move along the axial direction, thereby realizing the automatic switching of the two locating pins, and realizing the rapid production change of the first model equipment and the second model equipment.

[0057] It can be understood that when the driving unit is a double-rod cylinder, the movements of the first locating pin and the second locating pin are highly consistent, and the number of driving components can be reduced, thereby reducing manufacturing costs and saving space.

[0058] In an optional embodiment of the present application, the automatic model switching system also includes a first sensor and a second sensor arranged on the driving unit, the first sensor is used to monitor whether the first positioning pin is in the lifting position, and the second sensor is used to monitor whether the second positioning pin is in the lifting position, that is, the first sensor and the second sensor can monitor whether the first positioning pin and the second positioning pin are in the positioning state to control the start and stop of the driving unit.

[0059] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A positioning pin switching device, characterized in that: It includes a first positioning pin, a second positioning pin, a first guide plate, a second guide plate and a driving unit; The first positioning pin is slidably connected to the first guide plate, and the first positioning pin has a lifting position and a falling position relative to the first guide plate; the second positioning pin is slidably connected to the second guide plate, and the second positioning pin has a lifting position and a falling position relative to the second guide plate; when the first positioning pin is in the lifting position, the second positioning pin is in the falling position; when the first positioning pin is in the falling position, the second positioning pin is in the lifting position; The driving unit is transmission-connected to the first guide plate and the second guide plate, and is used to drive the first guide plate and the second guide plate to move linearly synchronously, so as to drive the first positioning pin and the second positioning pin to switch between the lifting position and the falling position respectively along their respective axial directions.

2. The positioning pin switching device according to claim 1, characterized in that: A first guide assembly is provided between the first positioning pin and the first guide plate; the first guide assembly includes a first guide groove and a first guide rail slidably matched with the first guide groove, and the extension direction of the first guide rail forms an acute angle α1 with the axial direction of the first positioning pin, α1>0; wherein the first guide groove is provided on the first positioning pin, and the first guide rail is provided on the first guide plate; or, the first guide groove is provided on the first guide plate, and the first guide rail is provided on the first positioning pin; And / or, a second guide assembly is provided between the second positioning pin and the second guide plate; the second guide assembly includes a second guide groove and a second guide rail slidably matched with the second guide groove, and the extension direction of the second guide rail forms an acute angle α2 with the axial direction of the second positioning pin, α2>0; wherein, the second guide groove is provided on the second positioning pin, and the second guide rail is provided on the second guide plate; or, the second guide groove is provided on the second guide plate, and the second guide rail is provided on the second positioning pin.

3. The positioning pin switching device according to claim 1, characterized in that: The positioning pin switching device also includes a first positioning bottom shaft, the first positioning pin is fixedly arranged on the first positioning bottom shaft; a first guide assembly is arranged between the first positioning bottom shaft and the first guide plate; the first guide assembly includes a first guide groove, and a first guide rail slidably matched with the first guide groove, and the extension direction of the first guide rail forms an acute angle α1 with the axial direction of the first positioning pin, α1>0; wherein, the first guide groove is arranged on the first positioning bottom shaft, and the first guide rail is arranged on the first guide plate; or, the first guide groove is arranged on the first guide plate, and the first guide rail is arranged on the first positioning bottom shaft; And / or, the positioning pin switching device also includes a second positioning base shaft, and the second positioning pin is fixed on the second positioning base shaft; a second guide assembly is provided between the second positioning base shaft and the second guide plate; the second guide assembly includes a second guide groove, and a second guide rail slidably matched with the second guide groove, and the extension direction of the second guide rail forms an acute angle α2 with the axial direction of the second positioning pin, α2>0; wherein, the second guide groove is provided on the second positioning base shaft, and the second guide rail is provided on the second guide plate; or, the second guide groove is provided on the second guide plate, and the second guide rail is provided on the second positioning base shaft.

4. The positioning pin switching device according to claim 2 or 3, characterized in that: α 1＝ α1, and 0 < α1 ≤ 35°.

5. The positioning pin switching device according to claim 2 or 3, characterized in that: The positioning pin switching device also includes a guide plate base, and the first guide plate and the second guide plate are both fixedly arranged on the guide plate base; The driving unit is transmission-connected to the guide plate base, and is used for driving the guide plate base to move along a first direction, so as to drive the first guide plate and the second guide plate to move along the first direction, wherein the first direction is perpendicular to the axial direction of the first positioning pin, and the axial direction of the first positioning pin is parallel to the axial direction of the second positioning pin.

6. The positioning pin switching device according to claim 2 or 3, characterized in that: Along the radial direction of the first positioning pin, a gap between the inner wall of the first guide groove and the first guide rail is less than or equal to 0.1 mm, so as to limit the rotation of the first positioning pin; Along the radial direction of the second positioning pin, a gap between the inner wall of the second guide groove and the second guide rail is less than or equal to 0.1 mm, so as to limit the rotation of the second positioning pin.

7. The positioning pin switching device according to any one of claims 1 to 3, characterized in that: The positioning pin switching device also includes a first guide sleeve sleeved on the first positioning pin and a second guide sleeve sleeved on the second positioning pin; The first guide sleeve is used to limit the first positioning pin to reciprocate only along the axial direction of the first positioning pin, and the second guide sleeve is used to limit the second positioning pin to reciprocate only along the axial direction of the second positioning pin.

8. A machine type automatic switching system, characterized in that: It comprises a first type of equipment, a second type of equipment, and a positioning pin switching device as described in any one of claims 1 to 7, wherein when the first positioning pin is in the lifting position, the first type of equipment performs production, and when the second positioning pin is in the lifting position, the second type of equipment performs production.

9. The automatic model switching system according to claim 8, characterized in that: The number of the first positioning pins and the first guide plates corresponding to the first model device is at least two, and the number of the second positioning pins and the second guide plates corresponding to the second model device is at least two.

10. The automatic model switching system according to claim 8 or 9, characterized in that: It also includes a first sensor and a second sensor arranged on the driving unit, wherein the first sensor is used to monitor whether the first positioning pin is in the lifting position, and the second sensor is used to monitor whether the second positioning pin is in the lifting position.

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