Compressing device with compact space

Abstract

The utility model relates to a pressing device with a compact space, and belongs to the technical field of clamps. The pressing device with the compact space comprises a first base, a first sliding block, a second sliding block, a second base, a third sliding block, a fourth sliding block, a driving piece, a first connecting rod and a second connecting rod. The first sliding block and the second sliding block are arranged on the first base in a sliding mode. The second base and the first base are arranged at intervals; the third sliding block and the fourth sliding block are arranged on the second base in a sliding mode. And when the driving piece drives the third sliding block and the fourth sliding block to get close to each other or get away from each other, the first sliding block and the second sliding block get away from each other or get close to each other, so that a workpiece placed in the workpiece placing area is loosened or pressed. According to the pressing device with the compact space, lateral pressing on a workpiece can be achieved in the compact space, and the occupied space of the whole device is small.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a compact pressing device. Background Art

[0002] During CNC machining, workpieces often require lateral compression. In related technologies, this is typically accomplished by using a pneumatic cylinder directly pushing the workpiece onto a base. A pneumatic cylinder and a slider are mounted on either side of the workpiece placement area on the base. The two pneumatic cylinders drive the sliders, pushing them sideways to compress the workpiece from both sides.

[0003] However, this structure that uses a cylinder direct push method to perform lateral pressure occupies a large space (or area). Utility Model Content

[0004] Based on this, the purpose of the present invention is to provide a compact pressing device, which can realize lateral pressure on a workpiece in a relatively compact space, and the overall device occupies a small space (or area).

[0005] A compact pressing device includes a first base, a first slider, a second slider, a second base, a third slider, a fourth slider, a driving member, a first connecting rod, and a second connecting rod;

[0006] The first slider and the second slider are respectively slidably arranged on the first base, and a workpiece placement area is provided between the first slider and the second slider; the second base is spaced apart from the first base; the third slider and the fourth slider are respectively slidably arranged on the second base; the driving member is arranged between the third slider and the fourth slider, and the driving member is used to drive the third slider and the fourth slider to slide respectively, so as to make the third slider and the fourth slider move closer to or away from each other; the middle part of the first connecting rod and the middle part of the second connecting rod are respectively fixed and hinged; the two ends of the first connecting rod are respectively connected to the first slider and the third slider; the two ends of the second connecting rod are respectively connected to the second slider and the fourth slider;

[0007] When the driving member drives the third slider and the fourth slider to slide respectively, so that the third slider and the fourth slider move closer to or farther away from each other, the first slider and the second slider move away from or closer to each other, so as to loosen or tighten the workpiece placed in the workpiece placement area.

[0008] The compact pressing device described in the present invention is designed to have the first base and the second base spaced apart, so that the first slider and the second slider are slidably set on the first base; the driving member is installed on the second base, and the third slider, the fourth slider, the first connecting rod and the second connecting rod are designed so that a "lever structure" is formed between the third slider, the first connecting rod and the first slider, and between the fourth slider, the second connecting rod and the second slider respectively, and the driving member is used to drive the third slider and the fourth slider to move closer to or away from each other, and under the action of the first connecting rod and the second connecting rod, the reverse movement between the first slider and the second slider is realized, thereby realizing the distance or approach between the first slider and the second slider, and realizing the loosening or pressing of the workpiece.

[0009] The compact pressing device described in the utility model can realize the side pushing of the first slider and the second slider in a compact space by designing and arranging various components. The overall device occupies a small space, especially solving the problem of the prior art using a direct pushing method that occupies a large outer space of the first slider and the second slider.

[0010] Furthermore, the driving member includes a first cylinder and a second cylinder, each mounted on the second base and located between the third and fourth sliders. The first cylinder is connected to the third slider to drive the third slider to slide, while the second cylinder is connected to the fourth slider to drive the fourth slider to slide. By mounting the first and second cylinders in the area between the third and fourth sliders, the device can be made more compact.

[0011] Furthermore, the third and fourth sliders are both concave-shaped; they are positioned opposite each other, each having a cylinder accommodation area located in the middle of the concave shape; the first cylinder and the second cylinder are mounted in the area between the cylinder accommodation areas of the third and fourth sliders, respectively. By employing the concave-shaped third and fourth sliders, the mounting space for the first and second cylinders is increased, improving the overall compactness of the structure and saving space while achieving functionality.

[0012] Furthermore, the third slider and the fourth slider each include a connecting portion and two sliding portions located on either side of the connecting portion; the two sliding portions are slidably disposed on the second base; the cylinder rod of the first cylinder is fixedly connected to the inner side of the connecting portion of the third slider, and the cylinder rod of the second cylinder is fixedly connected to the inner side of the connecting portion of the fourth slider. The connecting portion of the third slider is driven to reciprocate by the cylinder rod of the first cylinder, thereby causing the two sliding portions of the third slider to slide back and forth on the second base, and the connecting portion of the fourth slider is driven to reciprocate by the cylinder rod of the second cylinder, thereby causing the two sliding portions of the fourth slider to slide back and forth on the second base. Thus, the first and second cylinders can be used to drive the third and fourth sliders to move closer to or farther from each other.

[0013] Furthermore, the second base is arranged parallel to and below the first base, and a first linear guide and a second linear guide are respectively provided on both sides of the top surface of the first base along the two sides; the first slider is slidably provided on the first linear guide; the second slider is slidably provided on the second linear guide; a third linear guide and a fourth linear guide are respectively provided on both sides of the top surface of the second base along the two sides; the third slider is slidably provided on the third linear guide; and the fourth slider is slidably provided on the fourth linear guide. The design of the first linear guide, the second linear guide, the third linear guide, and the fourth linear guide makes the sliding of the first slider, the second slider, the third slider, and the fourth slider more stable.

[0014] Furthermore, the two sides of the second base extend outward from the two sides of the first base; the two sides of the first base are respectively provided with a first hinge portion and a second hinge portion extending outward; the upper and middle portions of the first and second connecting rods are hinged to the first and second hinge portions, respectively. By hingedly attaching the first and second connecting rods to the first and second hinge portions, a "lever structure" is formed between the third slider, the first connecting rod, and the first slider, and between the fourth slider, the second connecting rod, and the second slider, respectively.

[0015] Furthermore, the outer sides of the first slider and the outer sides of the second slider extend out of both sides of the first base respectively; the outer side of the first slider is provided with a first connecting hole, and the outer side of the second slider is provided with a second connecting hole; the first connecting hole and the second connecting hole are respectively located above the first hinge part and the second hinge part; the upper end of the first connecting rod is hinged to the first connecting hole; the upper end of the second connecting rod is hinged to the second connecting hole; the connecting part of the third slider is provided with a third connecting hole; the connecting part of the fourth slider is provided with a fourth connecting hole; the lower end of the first connecting rod is hinged to the third connecting hole; the lower end of the second connecting rod is hinged to the fourth connecting hole.

[0016] Furthermore, both ends of the first connecting rod and the second connecting rod are provided with bent portions. When the first cylinder and the second cylinder drive the third and fourth sliders to slide, respectively, the first and second connecting rods rotate to a certain extent, which tends to produce a "height difference." However, the height difference between the first and third sliders, and the height difference between the second and fourth sliders, remain constant. By designing both ends of the first connecting rod and the second connecting rod as bent portions, the effect of the height difference between the first and second connecting rods during movement can be reduced, thereby enabling the first, second, third, and fourth sliders to slide stably in bilateral directions.

[0017] Furthermore, a workpiece carrier is provided in the workpiece placement area for placing the workpiece, and the workpiece is placed by the workpiece carrier to improve the convenience of operation.

[0018] Furthermore, a plurality of support columns are provided between the first base and the second base, so that the first base and the second base are spaced apart by the support columns, thereby improving the mechanical stability of the overall structure.

[0019] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a compact pressing device of the utility model;

[0021] Figure 2 for Figure 1 The main view;

[0022] Figure 3 is a structural diagram of the first base;

[0023] Figure 4 Schematic diagram of the assembly structure of the first base and the workpiece carrier;

[0024] Figure 5 is a structural schematic diagram of the second base;

[0025] Figure 6 Schematic diagram of the assembly structure of the first slider, the first connecting rod and the third slider, and the second slider, the second connecting rod and the fourth slider;

[0026] Figure 7 A schematic diagram of the structure of the first slider and the second slider;

[0027] Figure 8 is a schematic structural diagram of a first connecting rod and a second connecting rod;

[0028] Figure 9 This is a schematic diagram of the assembly structure of the third slider and the first cylinder, and the fourth slider and the second cylinder. DETAILED DESCRIPTION

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] Furthermore, the terms "first," "second," "third," etc., in the specification and claims are used solely for descriptive purposes to distinguish between identical technical features. They are not to be construed as indicating or implying relative importance, or as implicitly specifying the number of technical features, nor do they necessarily describe a sequential or chronological order. The terms are interchangeable where appropriate. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one of those features.

[0031] Similarly, the term "connected" used in the specification and claims should not be construed as limited to direct connections. Thus, the expression "device A is connected to device B" should not be limited to devices or systems in which device A is directly connected to device B. Rather, it means that there is a path between device A and device B, which may include other devices or tools.

[0032] Example 1

[0033] When performing CNC cutting, the workpiece usually needs to be laterally pressed. In the related art, the workpiece is usually pushed and pressed laterally by a cylinder directly on the same base. For example, a cylinder and a slider are installed on both sides of the workpiece placement area on the same base, and two cylinders are used to drive the two sliders to push them directly, and the workpiece placed in the workpiece placement area is pressed from both sides of the workpiece to compress the workpiece. This embodiment takes into account that the structure that uses a cylinder direct push method to perform lateral pressure occupies a large space. At the same time, since it is a cylinder direct push, in order to achieve the required pressure, the cylinder model used is also relatively large, and the cost required to manufacture the overall structure is also high.

[0034] In order to reduce the overall volume of the device while also achieving the side-pushing function of the workpiece, this embodiment designs a compact pressing device. Specifically:

[0035] This embodiment provides a compact pressing device, please refer to Figure 1 and Figure 2 , including a first base 1, a first slider 2, a second slider 3, a second base 4, a third slider 5, a fourth slider 6, a driving member 7, a first connecting rod 8, and a second connecting rod 9.

[0036] See also Figure 1-Figure 3 The first slider 2 and the second slider 3 are slidably disposed on the first base 1, and a workpiece placement area 10 is defined between the first slider 2 and the second slider 3. When a workpiece is placed in the workpiece placement area 10, the first slider 2 and the second slider 3 move closer or further away from each other on the first base 1 to press or release the workpiece from both sides. Figure 1 and Figure 2 The second base 4 is spaced below the first base 1, and the third slider 5 and the fourth slider 6 are slidably disposed on the second base 4; see Figure 1 The driving member 7 is disposed between the third slider 5 and the fourth slider 6. The driving member 7 is used to drive the third slider 5 and the fourth slider 6 to slide, so that the third slider 5 and the fourth slider 6 move closer to or farther away from each other. Figure 1 and Figure 2 The middle portions of the first connecting rod 8 and the middle portions of the second connecting rod 9 are fixedly hinged. The two ends of the first connecting rod 8 are connected to the first slider 2 and the third slider 5, respectively. The two ends of the second connecting rod 9 are connected to the second slider 3 and the fourth slider 6, respectively. When the driving member 7 drives the third slider 5 and the fourth slider 6 to slide on the second base 4, causing the third slider 5 and the fourth slider 6 to move closer to or further away from each other, the first connecting rod 8 and the second connecting rod cause the first slider 2 and the second slider 3 to move closer to or further away from each other, thereby loosening or tightening the workpiece placed in the workpiece placement area 10.

[0037] In order to facilitate driving the third slider 5 and the fourth slider 6 to slide on the second base 4, in this embodiment, please refer to Figure 2 、 Figure 6 and Figure 9 The driving member 7 includes a first cylinder 71 and a second cylinder 72, both of which are telescopic cylinders. The first cylinder 71 and the second cylinder 72 are respectively mounted on the second base 4 and are located between the third slider 5 and the fourth slider 6. By installing the first cylinder 71 and the second cylinder 72 in the area between the third slider 5 and the fourth slider 6, the spatial structure of the device can be made more compact. The first cylinder 71 is connected to the third slider 5 to drive the third slider 5 to slide; the second cylinder 72 is connected to the fourth slider 6 to drive the fourth slider 6 to slide.

[0038] In order to further improve the space problem caused by the first cylinder 71 and the second cylinder 72 being installed between the third slider 5 and the fourth slider 6. In this embodiment, please refer to Figure 6 and Figure 9 The third and fourth sliders 5 and 6 are both designed in a concave shape; each slider has a cylinder accommodating area 50 located in the middle of the concave shape. In this embodiment, the third and fourth sliders 5 and 6 are positioned opposite each other, with the first and second cylinders 71 and 72 respectively installed in the area between the cylinder accommodating areas 50 of the third and fourth sliders 5 and 6, respectively. Specifically, the first cylinder 71 is installed in the space near the cylinder accommodating area 50 of the third slider 5, with the cylinder rod of the first cylinder 71 located in the cylinder accommodating area 50 of the third slider 5; the second cylinder 72 is installed in the space near the cylinder accommodating area 50 of the fourth slider 6, with the cylinder rod of the second cylinder 71 located in the cylinder accommodating area 50 of the fourth slider 6. Therefore, by adopting the concave shape of the third and fourth sliders 5 and 6, the installation space for the first and second cylinders 71 and 72 is increased, improving the spatial compactness of the overall structure, saving space while achieving functionality.

[0039] In this example, see Figure 9The concave-shaped third and fourth sliders 5 and 6 each include a connecting portion 51 and two sliding portions 52 located on either side of the connecting portion 51; the two sliding portions 52 are slidably disposed on the second base 4. The cylinder rod of the first cylinder 71 is fixedly connected to the inner side of the connecting portion 51 of the third slider 5 (located on one side of the cylinder accommodation area 50). When the cylinder rod of the first cylinder 71 drives the connecting portion 51 of the third slider 5 to reciprocate, it drives the two sliding portions 52 of the third slider 5 to slide back and forth on the second base 4, thereby achieving the reciprocating sliding of the third slider 5 by the first cylinder 5. Similarly, the cylinder rod of the second cylinder 72 is fixedly connected to the inner side of the connecting portion 51 of the fourth slider 6 (located on one side of the cylinder accommodation area 50). When the cylinder rod of the second cylinder 72 drives the connecting portion 51 of the fourth slider 6 to reciprocate, it drives the two sliding portions 52 of the fourth slider 6 to slide back and forth on the second base 4, thereby achieving the reciprocating sliding of the fourth slider 6 by the second cylinder 72. Therefore, in this embodiment, through the above design, the first cylinder 71 and the second cylinder 72 are used to drive the third slider 5 and the fourth slider 6 to move closer to or farther away from each other on the second base 4 .

[0040] In order to facilitate the stable sliding of the first slider 2 and the second slider 3 on the first base 1, and the stable sliding of the third slider 5 and the fourth slider 6 on the second base 4. In this embodiment, the second base 4 is arranged parallel to the lower side of the first base 1. Figure 2 and Figure 5 , a number of support columns 43 are provided between the second base 4 and the first base 1 to improve the support stability. Figure 3 and Figure 4 , a first linear guide rail 13 and two second linear guide rails 14 extending in both sides are respectively provided on both sides of the top surface of the first base 1. Specifically, there are two first linear guide rails 13 and two second linear guide rails 14 respectively. The first slider 2 is slidably provided on the two first linear guide rails 13, and the second slider 3 is slidably provided on the two second linear guide rails 14, so that the first slider 2 and the second slider 3 are slidably provided on both sides of the top surface of the first base 1. Similarly, please refer to Figure 5 The top surface of the second base 4 is provided with a third linear guide rail 41 and a fourth linear guide rail 42 extending along both sides. The third slider 5 is slidably arranged on the third linear guide rail 41, and the fourth slider 6 is slidably arranged on the second linear guide rail 42. Figure 3-Figure 5 Specifically, there are two third linear guide rails 41 and two fourth linear guide rails 42 respectively, the two sliding parts 52 of the third slider 5 are respectively slidably set on the two third linear guide rails 41, and the two sliding parts 52 of the third slider 6 are respectively slidably set on the two fourth linear guide rails 42, so that the third slider 5 and the fourth slider 6 are respectively slidably set on both sides of the top surface of the second base 4.

[0041] In order to facilitate the hinged arrangement of the middle portion (the portion between the two ends) of the first connecting rod 8 and the second connecting rod 9, in this embodiment, please refer to Figure 3 and Figure 4 A first hinge portion 11 and a second hinge portion 12 are provided on either side of the first base 1, extending outward. The middle portions (specifically, the upper middle portions, near the upper ends) of the first connecting rod 8 and the second connecting rod 9 are hingedly connected to the first hinge portion 11 and the second hinge portion 12, respectively. In this embodiment, the first hinge portion 11 and the second hinge portion 12 are connecting rod hinge blocks installed on either side of the first base 1.

[0042] In order to facilitate the hinged connection between the upper end of the first connecting rod 8 and the upper end of the second connecting rod 9 and the first slider 2 and the second slider 3, respectively, in this embodiment, the outer side of the first slider 2 and the outer side of the second slider 3 extend out of both sides of the first base 1, so that the upper end of the first connecting rod 8 and the upper end of the second connecting rod 9 can be smoothly hinged with the first slider 2 and the second slider 3 respectively without being blocked by the outer side of the first base 1. For details, please refer to Figure 7 The outer sides of the first slider 2 and the second slider 3 extend out of both sides of the first base 1 respectively, and a first connecting hole 21 is provided on the outer side of the first slider 2, and a second connecting hole 31 is provided on the outer side of the second slider 3; the first connecting hole 21 and the second connecting hole 31 are respectively located above the first hinge part 11 and the second hinge part 12; the upper end of the first connecting rod 8 is hingedly set at the first connecting hole 21; the upper end of the second connecting rod 9 is hingedly set at the second connecting hole 91.

[0043] In order to facilitate the hinged connection between the lower ends of the first connecting rod 8 and the second connecting rod 9 and the third slider 5 and the fourth slider 6, respectively, in this embodiment, the two sides of the second base 4 extend beyond the two sides of the first base 1 (i.e., the size of the first base 1 is smaller than that of the second base 4); the third slider 5 and the fourth slider 6 are slidably arranged on both sides of the second base 4, so that the lower ends of the first connecting rod 8 and the second connecting rod 9 can be smoothly hinged with the third slider 5 and the fourth slider 6, respectively, and can avoid obstruction of the upper ends of the first connecting rod 8 and the second connecting rod 9 during the rotation process. For details, please refer to Figure 9 The connecting portion 51 of the third slider 5 is provided with a third connecting hole 53; the connecting portion 51 of the fourth slider 6 is provided with a fourth connecting hole 61; the lower end of the first connecting rod 8 is hingedly set in the third connecting hole 55; the lower end of the second connecting rod 9 is hingedly set in the fourth connecting hole 61.

[0044] Therefore, through the above design, the first slider 2 and the third slider 5 are connected by the first connecting rod 8, and the second slider 3 and the fourth slider 6 are connected by the first connecting rod 9, and they can be unobstructed during the hinged rotation of the first connecting rod 8 and the first connecting rod 9, so that the third slider 5 and the fourth slider 6 can slide smoothly, and under the action of the first connecting rod 8 and the first connecting rod 9, the first slider 2 and the third slider 3 are driven to slide smoothly.

[0045] In this embodiment, in order to improve the transmission stability, please refer to Figure 8 , there are two first connecting rods 8 and two second connecting rods 9 respectively. Figure 7 and Figure 9 There are two first connection holes 21, two first hinge parts 43, two third connection holes 53, two second connection holes 31, two second hinge parts 44, and two fourth connection holes 61 respectively.

[0046] In this example, see Figure 8 , both ends of the first connecting rod 8 and the second connecting rod 9 are respectively provided with a bent portion 81. When the first cylinder 71 and the second cylinder 72 respectively drive the third slider 5 and the fourth slider 6 to slide, the first connecting rod 8 and the second connecting rod 9 will rotate to a certain extent, and there is a tendency to generate a "height difference". However, the height difference between the first slider 2 and the third slider 5, and the height difference between the second slider 3 and the fourth slider 6 are unchanged. By designing both ends of the first connecting rod 8 and the second connecting rod 9 as bent portions 81, the impact of the height difference between the first connecting rod 8 and the second connecting rod 9 during movement can be reduced, so that the first slider 2, the second slider 3, the third slider 5, and the fourth slider 6 can slide stably in the directions on both sides.

[0047] In this embodiment, in order to facilitate the placement of the workpiece, please refer to Figure 3 and Figure 4 The workpiece placement area 10 in the center of the top surface of the first base 1 can be positioned to accommodate a workpiece carrier 20. The workpiece carrier 20 is used to place the workpiece, thereby improving operational convenience. Specifically, a positioning post 15 is provided on the workpiece placement area 10, and the workpiece carrier 20 is positioned and placed on the workpiece placement area 10 via the positioning post 15.

[0048] The space-compact clamping device of this embodiment is designed to have a first base 1 and a second base 4 that are spaced apart, and the first slider 2 and the second slider 3 are slidably arranged on both sides of the first base 1 respectively; the driving member 7 is installed on the second base 4, and the third slider 5, the fourth slider 6, the first connecting rod 8 and the second connecting rod 9 are designed, so that a "lever structure" is formed between the third slider 5, the first connecting rod 8 and the first slider 2, and between the fourth slider 6, the second connecting rod 9 and the second slider 3 respectively, and the driving member 7 is used to drive the third slider 5 and the fourth slider 6 to move closer to or away from each other. Under the action of the first connecting rod 8 and the second connecting rod 9, the first slider 2 and the second slider 3 are reversely moved, thereby achieving the distance or approach between the first slider 5 and the second slider 6, and realizing the loosening or clamping of the workpiece.

[0049] When the workpiece needs to be cut, the workpiece to be processed is placed together with the workpiece carrier 20 in the workpiece placement area 10 on the first base 1, so that the first cylinder 71 and the second cylinder 72 respectively drive the third slider 5 and the fourth slider 6 to slide outward. During the process of the third slider 5 and the fourth slider 6 sliding outward, under the action of the first connecting rod 8 and the second connecting rod 9, the first slider 2 and the second slider 3 respectively slide inward, pushing and pressing the workpiece sideways.

[0050] When the workpiece needs to be loosened after being processed, the first cylinder 71 and the second cylinder 72 respectively drive the third slider 5 and the fourth slider 6 to slide inward. During the process of the third slider 5 and the fourth slider 6 sliding inward, under the action of the first connecting rod 8 and the second connecting rod 9, the first slider 2 and the second slider 3 respectively slide outward to loosen the workpiece.

[0051] The compact pressing device of this embodiment can complete the side pushing of the first slider 2 and the second slider 3 in a compact space. Through the design and layout of each component, the overall volume of the device is reduced, and the production cost, transportation cost, and placement cost caused by the large volume are reduced.

[0052] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous modifications and improvements without departing from the concept of the present invention, and the present invention is intended to encompass such modifications and variations.

Claims

1. A compact pressing device, characterized in that: It includes a first base, a first slider, a second slider, a second base, a third slider, a fourth slider, a driving member, a first connecting rod, and a second connecting rod; The first slider and the second slider are respectively slidably arranged on the first base, and a workpiece placement area is provided between the first slider and the second slider; the second base is spaced apart and arranged below the first base; the third slider and the fourth slider are respectively slidably arranged on the second base; the driving member is arranged between the third slider and the fourth slider, and the driving member is used to drive the third slider and the fourth slider to slide respectively, so as to make the third slider and the fourth slider move closer to or away from each other; the middle part of the first connecting rod and the middle part of the second connecting rod are respectively fixed and hinged; the two ends of the first connecting rod are respectively connected to the first slider and the third slider; the two ends of the second connecting rod are respectively connected to the second slider and the fourth slider; When the driving member drives the third slider and the fourth slider to slide respectively, so that the third slider and the fourth slider move closer to or farther away from each other, the first slider and the second slider move away from or closer to each other, so as to loosen or tighten the workpiece placed in the workpiece placement area.

2. The compact pressing device according to claim 1, characterized in that: The driving member includes a first cylinder and a second cylinder, which are respectively installed on the second base and located between the third slider and the fourth slider; the first cylinder is connected to the third slider for driving the third slider to slide; the second cylinder is connected to the fourth slider for driving the fourth slider to slide.

3. The compact pressing device according to claim 1, characterized in that: The third slider and the fourth slider are both concave-shaped; the third slider and the fourth slider are arranged opposite to each other, and the third slider and the fourth slider are respectively provided with a cylinder accommodating area located in the middle of the concave shape; the first cylinder and the second cylinder are respectively installed in the area between the cylinder accommodating area of ​​the third slider and the cylinder accommodating area of ​​the fourth slider.

4. The compact pressing device according to claim 3, characterized in that: The third slider and the fourth slider each include a connecting portion and two sliding portions located on both sides of the connecting portion; the two sliding portions are slidably arranged on the second base respectively; the cylinder rod of the first cylinder is fixedly connected to the inner side of the connecting portion of the third slider, and the cylinder rod of the second cylinder is fixedly connected to the inner side of the connecting portion of the fourth slider.

5. The compact pressing device according to claim 1, characterized in that: The second base is arranged parallel to the bottom of the first base, and the first linear guide rail and the second linear guide rail are respectively provided on both sides of the top surface of the first base along the two side directions; the first slider is slidably provided on the first linear guide rail; the second slider is slidably provided on the second linear guide rail; the third linear guide rail and the fourth linear guide rail are respectively provided on both sides of the top surface of the second base along the two side directions; the third slider is slidably provided on the third linear guide rail; the fourth slider is slidably provided on the fourth linear guide rail.

6. The compact pressing device according to claim 4, characterized in that: The two sides of the second base extend out from the two sides of the first base respectively; the two sides of the first base are respectively provided with a first hinge part and a second hinge part extending outward; the middle and upper parts of the first connecting rod and the second connecting rod are hinged to the first hinge part and the second hinge part respectively.

7. The compact pressing device according to claim 6, characterized in that: The outer sides of the first slider and the outer sides of the second slider extend out of both sides of the first base respectively; a first connecting hole is provided on the outer side of the first slider, and a second connecting hole is provided on the outer side of the second slider; the first connecting hole and the second connecting hole are respectively located above the first hinge part and the second hinge part; the upper end of the first connecting rod is hinged to the first connecting hole; the upper end of the second connecting rod is hinged to the second connecting hole; the connecting part of the third slider is provided with a third connecting hole; the connecting part of the fourth slider is provided with a fourth connecting hole; the lower end of the first connecting rod is hinged to the third connecting hole; the lower end of the second connecting rod is hinged to the fourth connecting hole.

8. The compact pressing device according to claim 7, characterized in that: Both ends of the first connecting rod and both ends of the second connecting rod are respectively provided with bending parts.

9. The compact pressing device according to claim 1, characterized in that: A workpiece carrier is provided in the workpiece placement area for placing the workpiece.

10. The compact pressing device according to claim 1, characterized in that: A plurality of support columns are arranged between the first base and the second base.

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