Positioning device

Abstract

The utility model relates to a positioning device which comprises a first seat body, a second seat body, a third seat body, a first driving mechanism, a second driving mechanism and a pressing plate. The first seat body is provided with a first side surface and a second side surface in a first direction; the second driving mechanism is used for driving the second seat body to be close to the first side surface and driving the third seat body to be close to the second side surface, so that a first accommodating groove is defined between the second seat body and the first side surface and a second accommodating groove is defined between the third seat body and the second side surface; the second seat body and the third seat body are driven by the second driving mechanism to move in the first direction, it is ensured that the workpiece to be machined is accurately positioned in the first direction, and meanwhile the second seat body and the third seat body can be driven by the second driving mechanism to move; in this way, the size of the first containing groove and the size of the second containing groove in the first direction are adjusted, so that the positioning device can be matched with various types of to-be-machined workpieces with the sizes different in the first direction.

Description

Technical Field

[0001] This application relates to the field of molds, and more particularly to a positioning device. Background Technology

[0002] In modern manufacturing, the precise positioning and stable fixation of workpieces are key factors in ensuring processing quality and efficiency. Especially in high-precision machining and mass production, traditional manual clamping and positioning methods can no longer meet the ever-increasing demands for precision and efficiency.

[0003] In related technologies, some workpieces of the same model have the same length and height, but their width may vary. Currently, for workpieces with varying widths, the only way to clamp them is by holding them on both sides of the length or height, which is not very adaptable. Utility Model Content

[0004] This application provides a positioning device to solve the problems mentioned above.

[0005] In a first aspect, this application provides a positioning device for fixing a workpiece to be processed. The positioning device includes: a first base, a second base, a third base, a first driving mechanism, a second driving mechanism, and a pressure plate. The first base has a first side and a second side in a first direction. The second driving mechanism is used to drive the second base closer to the first side and drive the third base closer to the second side, so that a first receiving groove adapted to the workpiece is defined between the second base and the first side, and a second receiving groove adapted to the workpiece is defined between the third base and the second side. The first driving mechanism is drivenly connected to the pressure plate and is used to drive the pressure plate closer to or further away from the first base in a second direction to press the workpiece into the first receiving groove and / or the second receiving groove. The first direction and the second direction are perpendicular to each other.

[0006] In some embodiments, at least one guide rod is further included, and at least one guide hole is provided on the pressure plate. At least one guide rod and at least one guide hole are correspondingly provided. The guide rod is provided on the first base body and slides in the corresponding guide hole.

[0007] In some embodiments, a first support block is provided on the side of the first side facing the second seat, and a second support block is provided on the side of the second seat facing the first side. When the first support block and the second support block abut against each other, a first receiving groove with an opening facing the pressure plate is defined between the first side and the second seat.

[0008] In some embodiments, a third support block is provided on the side of the second side facing the third seat, and a fourth support block is provided on the side of the third seat facing the second side. When the third support block and the fourth support block abut against each other, a first receiving groove with an opening facing the pressure plate is defined between the second side and the third seat.

[0009] In some embodiments, the second drive mechanism includes a motor, a gear, a first rack connected to a second base and a second rack connected to a third base, the first rack and the second rack extending along a first direction, the output shaft of the motor being coaxially connected to the gear, the first rack and the second rack being meshed with the gear, and the first rack and the second rack being located on opposite sides of the gear in a second direction.

[0010] In some embodiments, at least one first adjustment block is further included, the at least one first adjustment block being detachably disposed on the first side and / or the second seat.

[0011] In some embodiments, at least one second adjustment block is further included, the at least one second adjustment block being detachably disposed on the second side and / or the third seat.

[0012] In some embodiments, a first rubber pad is provided at the position of the pressure plate corresponding to the first receiving groove, and / or a second rubber pad is provided at the position of the pressure plate corresponding to the second receiving groove.

[0013] In some embodiments, the first drive mechanism includes a pneumatic cylinder or a hydraulic cylinder.

[0014] In some embodiments, a stop block is provided in the first receiving groove and / or the second receiving groove.

[0015] The technical solutions provided in this application have the following advantages compared with the prior art:

[0016] The positioning device provided in this application embodiment drives a second and a third base to move along a first direction via a second driving mechanism, forming a receiving groove adapted to the workpiece to be processed. This ensures precise positioning of the workpiece in the first direction. Furthermore, the second driving mechanism can also move the second and third bases to adjust the dimensions of the first and second receiving grooves in the first direction, enabling the positioning device to adapt to various types of workpieces with inconsistent dimensions in the first direction, thereby improving its adaptability. Secondly, the first driving mechanism drives a pressure plate to move along a second direction, pressing the two workpieces into the first and second receiving grooves respectively, providing a stable fixation and preventing displacement and vibration during processing. Moreover, the positioning device is designed to adapt to workpieces of different sizes and shapes; simply adjusting the distances of the second and third bases to the first and second sides respectively allows for adaptation to different workpieces, further improving the adaptability of the positioning device. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

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

[0021] Figure 2 This is a schematic diagram showing the connection relationship between the first base body, the second base body, and the third base body in an embodiment of this application;

[0022] Figure 3 This is a side view of the positioning device according to an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Positioning device;

[0025] 10. First base; 13. First receiving groove; 14. Second receiving groove;

[0026] 20. The second seat;

[0027] 30. The third body;

[0028] 40. First drive mechanism;

[0029] 50. Second drive mechanism; 51. Motor; 52. Gear; 53. First rack; 54. Second rack;

[0030] 60. Pressure plate; 61. Guide hole;

[0031] 70. Guide rod;

[0032] 80. First support block;

[0033] 90. Second support block;

[0034] 100. Third support block;

[0035] 110. Fourth support block;

[0036] 120. First adjustment block;

[0037] 130. Second adjustment block;

[0038] 140. First rubber pad;

[0039] 150. Second rubber pad;

[0040] 160. Stop block;

[0041] 2. Parts to be processed;

[0042] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0045] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0046] In modern manufacturing, the precise positioning and stable fixation of workpieces are key factors in ensuring processing quality and efficiency. Especially in high-precision machining and mass production, traditional manual clamping and positioning methods can no longer meet the ever-increasing demands for precision and efficiency.

[0047] In related technologies, some workpieces of the same model have the same length and height, but their width may vary. Currently, for workpieces with varying widths, the only way to clamp them is by holding them on both sides of the length or height, which is not very adaptable.

[0048] See Figures 1 to 3To address the technical problems existing in related technologies, this application provides a positioning device 1 for fixing a workpiece 2 to be processed. The positioning device 1 includes: a first base 10, a second base 20, a third base 30, a first driving mechanism 40, a second driving mechanism 50, and a pressure plate 60. The first base 10 has a first side and a second side in a first direction X. The second driving mechanism 50 is used to drive the second base 20 closer to the first side and drive the third base 30 closer to the second side, so that a first receiving groove 13 adapted to the workpiece 2 is defined between the second base 20 and the first side, and a second receiving groove 14 adapted to the workpiece 2 is defined between the third base 30 and the second side. The first driving mechanism 40 is drively connected to the pressure plate 60, and the first driving mechanism 40 is used to drive the pressure plate 60 closer to or further away from the first base 10 along a second direction Y, so as to press the workpiece 2 into the first receiving groove 13 and / or the second receiving groove 14. The first direction X and the second direction Y are perpendicular.

[0049] Positioning device 1 is in its initial state, with the first seat 10, second seat 20, and third seat 30 in preset positions, and pressure plate 60 not in contact with workpiece 2. When it is necessary to position workpiece 2, the first workpiece 2 is placed between the first side and the second seat 20, and the second workpiece 2 is placed between the second side and the third seat 30. Then, the second drive mechanism 50 drives the second seat 20 to move along the first direction X to approach the first side and the third seat 30 to move along the first direction X to approach the second side, until a first receiving groove 13 adapted to the first workpiece 2 is formed between the second seat 20 and the first side, and a second receiving groove 14 adapted to the second workpiece 2 is formed between the third seat 30 and the second side. At this time, the first workpiece 2 is clamped in the first receiving groove 13, and the second workpiece 2 is clamped in the second receiving groove 14. The second step involves activating the first drive mechanism 40 to drive the pressure plate 60 to move along the second direction Y, bringing the pressure plate 60 closer to the first base 10. This presses the first workpiece 2 and the second workpiece 2 into the first receiving groove 13 and the second receiving groove 14, respectively, ensuring that the first workpiece 2 and the second workpiece 2 remain fixed. After the positioning device 1 of this application completes the positioning of the first workpiece 2 and the second workpiece 2, the corresponding processing operation can be performed. Since the first workpiece 2 and the second workpiece 2 are firmly fixed in the positioning device 1, vibration and displacement during the processing are minimized, which helps to ensure the processing accuracy and quality of the workpiece 2.

[0050] After processing the first workpiece 2 and the second workpiece 2, the first drive mechanism 40 is activated first, causing the pressure plate 60 to move away from the first seat 10 along the second direction Y, thus releasing the fixation of the workpiece 2. Then the second drive mechanism 50 is activated, driving the second seat 20 and the third seat 30 away from the first side and the second side along the first direction X, thereby releasing the positioning of the workpiece 2.

[0051] According to the positioning device 1 of this application, the second base 20 and the third base 30 are driven to move along the first direction X by the second driving mechanism 50 to form a receiving groove adapted to the workpiece 2 to be processed, ensuring the precise positioning of the workpiece 2 in the first direction X. Simultaneously, this application can also drive the second base 20 and the third base 30 to move by the second driving mechanism 50, thereby adjusting the dimensions of the first receiving groove 13 and the second receiving groove 14 in the first direction X, so that the positioning device 1 of this application can adapt to various types of workpieces 2 with inconsistent dimensions in the first direction X, thereby improving the adaptability of the positioning device 1 of this application. Secondly, the first driving mechanism 40 drives the pressure plate 60 to move along the second direction Y, pressing the two workpieces 2 into the first receiving groove 13 and the second receiving groove 14 respectively, thereby providing a stable fixing effect for the two workpieces 2 and preventing displacement and vibration of the two workpieces 2 during processing. Furthermore, the positioning device 1 is designed to adapt to workpieces 2 of different sizes and shapes. It can be adapted to different workpieces 2 simply by adjusting the distance between the second seat 20 and the third seat 30 and the first and second sides, respectively, thereby improving the adaptability of the positioning device 1 of this application.

[0052] It should be noted that the shapes of the first receiving groove 13 and the second receiving groove 14 can be adaptively adjusted according to the shape of the workpiece 2. For example, when the workpiece 2 is cuboid, the first receiving groove 13 and the second receiving groove 14 are cuboid; when the workpiece 2 is elliptical, the first receiving groove 13 and the second receiving groove 14 are elliptical. The specific shapes of the first receiving groove 13 and the second receiving groove 14 are not limited here.

[0053] In some embodiments, see Figures 1 to 3 This application also includes at least one guide rod 70, and at least one guide hole 61 is provided on the pressure plate 60. At least one guide rod 70 and at least one guide hole 61 are correspondingly provided. The guide rod 70 is provided on the first base 10 and slides in the corresponding guide hole 61.

[0054] For example, there are two guide rods 70 and two guide holes 61. The two guide holes 61 are located on both sides of the output shaft of the first drive mechanism 40. The arrangement of the two guide rods 70 and the guide holes 61 can ensure that the pressure plate 60 moves linearly along the second direction Y, avoid the pressure plate 60 from shifting or tilting, and improve the positioning accuracy of the workpiece 2. Secondly, the cooperative use of the guide rods 70 and the guide holes 61 reduces the friction and wear between the pressure plate 60 and other components during movement, thereby extending the service life of the positioning device 1.

[0055] In some embodiments, see Figures 1 to 3 A first support block 80 is provided on the side of the first side facing the second seat 20, and a second support block 90 is provided on the side of the second seat 20 facing the first side. When the first support block 80 and the second support block 90 abut against each other, a first receiving groove 13 with an opening facing the pressure plate 60 is defined between the first side and the second seat 20. This application uses the abutment of the first support block 80 and the second support block 90 to support the workpiece 2 to be processed.

[0056] For example, the first support block 80 is disposed on the first side away from the pressure plate 60, and the second support block 90 is disposed on the second seat 20 facing the first side away from the pressure plate 60, so that when the first support block 80 and the second support block 90 abut against each other, the opening of the first receiving groove 13 formed by the second seat 20, the first side, the first support block 80 and the second support block 90 faces the pressure plate 60, so that when the workpiece 2 is placed in the first receiving groove 13, the pressure plate 60 can be driven by the first driving mechanism 40 to face the opening of the first receiving groove 13 to press the workpiece 2 into the first receiving groove 13. With this arrangement, the workpiece 2 in the first receiving groove 13 can be limited in both the first direction X and the second direction Y.

[0057] In a preferred embodiment, the first support block 80 and the second support block 90 are in the shape of cuboids, so that there is no gap between the first support block 80 and the second support block 90 after they come into contact, so that the first support block 80 and the second support block 90 can completely fit the workpiece 2 to be processed, thereby improving the support effect of the first support block 80 and the second support block 90 on the workpiece 2 to be processed.

[0058] It should be noted that when the first support block 80 and the second support block 90 abut against each other, the bottom surface of the workpiece 2 to be processed is attached to the first support block 80 and the second support block 90, and the two sides of the workpiece 2 to be processed are respectively attached to the first side and the side of the second seat 20 facing the first seat 10 in the first direction X. Therefore, the size of the workpiece 2 to be processed in the first direction X is equal to or less than the sum of the sizes of the first support block 80 and the second support block 90 in the first direction X.

[0059] In some embodiments, a third support block 100 is provided on the side of the second side facing the third seat 30, and a fourth support block 110 is provided on the side of the third seat 30 facing the second side. When the third support block 100 and the fourth support block 110 abut against each other, a second receiving groove 14 with an opening facing the pressure plate 60 is defined between the second side and the third seat 30. In this application, the abutment between the third support block 100 and the fourth support block 110 serves to support the workpiece 2 to be processed.

[0060] For example, the third support block 100 is disposed on the second side away from the pressure plate 60, and the fourth support block 110 is disposed on the second seat 20 facing the second side away from the pressure plate 60, so that when the third support block 100 and the fourth support block 110 abut against each other, the opening of the second receiving groove 14 formed between the second seat 20, the second side, the third support block 100 and the fourth support block 110 faces the pressure plate 60, so that when the workpiece 2 is placed in the second receiving groove 14, the pressure plate 60 can be driven by the first driving mechanism 40 to face the opening of the second receiving groove 14 to press the workpiece 2 into the second receiving groove 14. With this arrangement, the workpiece 2 in the second receiving groove 14 can be limited in both the first direction X and the second direction Y.

[0061] In a preferred embodiment, the third support block 100 and the fourth support block 110 are cuboid in shape so that there is no gap between the third support block 100 and the fourth support block 110 after they come into contact, so that the third support block 100 and the fourth support block 110 can completely fit the workpiece 2 to be processed, thereby improving the support effect of the third support block 100 and the fourth support block 110 on the workpiece 2 to be processed.

[0062] It should be noted that when the third support block 100 and the fourth support block 110 abut against each other, the bottom surface of the workpiece 2 is attached to the third support block 100 and the fourth support block 110, and the two sides of the workpiece 2 in the first direction X are attached to the second side and the side of the third seat 30 facing the first seat 10, respectively. Therefore, the size of the workpiece 2 in the first direction X is equal to the sum of the sizes of the third support block 100 and the fourth support block 110 in the first direction X.

[0063] In some embodiments, see Figure 3 The second drive mechanism 50 includes a motor 51, a gear 52, a first rack 53 connected to the second seat 20, and a second rack 54 connected to the third seat 30. The first rack 53 and the second rack 54 extend along the first direction X, respectively. The output shaft of the motor 51 is coaxially connected to the gear 52. The first rack 53 and the second rack 54 are meshed with the gear 52, respectively. The first rack 53 and the second rack 54 are located on both sides of the gear 52 in the second direction Y.

[0064] According to the embodiments of this application, when it is necessary to place the first workpiece 2 and the second workpiece 2 into the first receiving groove 13 and the second receiving groove 14, the first workpiece 2 and the second workpiece 2 are first placed on the first support block 80 and the third support block 100 respectively. Then, the motor 51 is started. The output shaft of the motor 51 drives the gear 52 connected to it to rotate. The gear 52 drives the first rack 53 and the second rack 54 to move in opposite directions along the first direction X, thereby driving the second seat 20 and the third seat 30 to move closer to or further away from the first side and the second side at the same time, thereby driving the second seat 20 and the third seat 30 to move synchronously.

[0065] In some embodiments, see Figures 1 to 3 This application also includes at least one first adjustment block 120, which is detachably disposed on the first side and / or the second seat 20. With this configuration, when facing multiple workpieces 2 with inconsistent dimensions in the first direction X, this application can adjust the size of the first receiving groove 13 in the first direction X by setting the first adjustment block 120. With this configuration, the positioning device 1 of this application can be applied to various types of workpieces 2 with inconsistent dimensions in the first direction X.

[0066] In some embodiments, see Figures 1 to 3 This application also includes at least one second adjustment block 130, which is detachably disposed on the second side and / or the third seat 30. This application can adjust the size of the second receiving groove 14 in the first direction X by setting the second adjustment block 130. With this configuration, the positioning device 1 of this application can be applied to various types of workpieces 2 with inconsistent sizes in the first direction X.

[0067] In some embodiments, a first rubber pad 140 is provided at a position corresponding to the first receiving groove 13 on the pressure plate 60, and / or a second rubber pad 150 is provided at a position corresponding to the second receiving groove 14 on the pressure plate 60. The first rubber pad 140 and the second rubber pad 150 can provide a cushioning effect, reducing direct contact between the pressure plate 60 and the workpiece 2 to be processed, preventing the surface of the workpiece 2 from being crushed or scratched, and protecting the surface quality of the workpiece 2. Secondly, the first rubber pad 140 and the second rubber pad 150 have a certain elasticity and friction, which can enhance the fixing effect of the workpiece 2 to be processed, prevent the workpiece 2 from sliding or shifting during processing, and improve the stability and accuracy of processing.

[0068] In some embodiments, the first drive mechanism 40 includes a pneumatic cylinder or a hydraulic cylinder.

[0069] In some embodiments, a stop block 160 is provided in the first receiving groove 13 and / or the second receiving groove 14. The stop block 160 is provided on one side of the first receiving groove 13 in the third direction Z. The third direction Z is perpendicular to the first direction X and the second direction Y, respectively, so that the positioning device 1 of this application can completely restrict the six degrees of freedom of the workpiece 2 to be processed, and further improve the positioning accuracy of the positioning device 1 of this application.

[0070] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0071] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0072] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0073] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0074] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0076] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0077] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A positioning device for fixing a workpiece to be processed, characterized in that, The positioning device includes: a first seat, a second seat, a third seat, a first driving mechanism, a second driving mechanism, and a pressure plate; the first seat has a first side and a second side in a first direction; the second driving mechanism is used to drive the second seat closer to the first side and drive the third seat closer to the second side, so that a first receiving groove adapted to the workpiece is defined between the second seat and the first side, and a second receiving groove adapted to the workpiece is defined between the third seat and the second side; the first driving mechanism is drivenly connected to the pressure plate, and the first driving mechanism is used to drive the pressure plate closer to or further away from the first seat along a second direction, so as to press the workpiece into the first receiving groove and / or the second receiving groove; wherein, the first direction and the second direction are perpendicular.

2. The positioning device according to claim 1, characterized in that, It also includes at least one guide rod, and the pressure plate is provided with at least one guide hole. The at least one guide rod and the at least one guide hole are correspondingly arranged. The guide rod is disposed on the first base body and slides in the corresponding guide hole.

3. The positioning device according to claim 2, characterized in that, A first support block is provided on the side of the first side facing the second seat, and a second support block is provided on the side of the second seat facing the first side. When the first support block and the second support block abut against each other, a first receiving groove with an opening facing the pressure plate is defined between the first side and the second seat.

4. The positioning device according to claim 2, characterized in that, A third support block is provided on the side of the second side facing the third seat, and a fourth support block is provided on the side of the third seat facing the second side. When the third support block and the fourth support block abut against each other, a first receiving groove with an opening facing the pressure plate is defined between the second side and the third seat.

5. The positioning device according to claim 2, characterized in that, The second drive mechanism includes a motor, a gear, a first rack connected to the second base, and a second rack connected to the third base. The first rack and the second rack extend along the first direction. The output shaft of the motor is coaxially connected to the gear. The first rack and the second rack are meshed with the gear. The first rack and the second rack are located on both sides of the gear in the second direction.

6. The positioning device according to claim 2, characterized in that, It also includes at least one first adjustment block, which is detachably disposed on the first side and / or the second seat.

7. The positioning device according to claim 2, characterized in that, It also includes at least one second adjustment block, which is detachably disposed on the second side and / or the third seat.

8. The positioning device according to claim 2, characterized in that, A first rubber pad is provided at the position corresponding to the first receiving groove of the pressure plate, and / or a second rubber pad is provided at the position corresponding to the second receiving groove of the pressure plate.

9. The positioning device according to claim 2, characterized in that, The first drive mechanism includes a pneumatic cylinder or a hydraulic cylinder.

10. The positioning device according to claim 1, characterized in that, A stop block is provided in the first receiving groove and / or the second receiving groove.

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