A chamfering device for bushing machining

Abstract

This application relates to the field of bushing machining technology, and discloses a chamfering device for bushing machining, including a support table, a first linear slide, a first drive motor, an outer chamfering cutter, a second linear slide, a second drive motor, an inner chamfering cutter, a clamping member, and a linear movement module. In use, the bushing is clamped and fixed by the clamping member. Then, driven by the linear movement module, the bushing to be polished can be moved. When it moves between the two outer chamfering cutters, the first linear slides and the first drive motors on both sides are controlled to operate, thus chamfering the outer rings at both ends of the bushing. When it moves between the two inner chamfering cutters, the second linear slides and the second drive motors on both sides are controlled to operate, thus chamfering the inner rings at both ends of the bushing. Therefore, the chamfering of the inner and outer rings at both ends of the bushing can be completed in one clamping operation, and the feed is automatically completed during the chamfering process.

Description

Technical Field

[0001] This application relates to the field of bushing processing technology, and in particular to a chamfering device for bushing processing. Background Technology

[0002] A chamfering device for bushing processing is disclosed in related technology (announcement number: CN221158834U), including a base. The base has a first sliding groove, within which a first translation block and a second translation block are disposed. A transmission structure and a bushing clamp are disposed between the first and second translation blocks. A first transmission column is disposed on the first and second translation blocks, and a first gear is disposed on the first transmission column. A rotating cutter head is disposed on one side of the two first transmission columns that are close to each other. A motor is disposed within the first translation block.

[0003] In the process of implementing the technical solution disclosed herein, at least the following problems were found in the related technologies:

[0004] This chamfering device for bushing machining uses a bushing clamp to hold and fix the bushing, and then two rotating cutters chamfer both ends of the bushing. However, a single clamping operation can only complete the chamfering of the outer or inner rings at both ends of the bushing. Furthermore, during the feed process, the first and second translation blocks must be manually moved to complete the feed.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] To provide a basic understanding of some aspects of the disclosed technical solutions, a brief summary is given below. This summary is not a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these technical solutions, but rather serves as a prelude to the detailed explanations that follow.

[0007] This disclosure provides a chamfering device for bushing machining to solve the problems mentioned in the background art.

[0008] In some technical solutions, the chamfering device for bushing machining includes: a support table; a first linear slide table, mounted on the top surface of the support table along its length and located on both sides of the support table; first drive motors, respectively mounted on the moving ends of the first linear slide tables on both sides, with the rotating ends of the first drive motors on both sides being distributed opposite to each other; an external chamfering cutter, respectively mounted on the rotating ends of the first drive motors on both sides; and a second linear slide table, mounted on the top surface of the support table along its length and located on both sides of the support table, wherein the line containing the second linear slide tables on both sides is parallel to the line containing the first linear slide tables on both sides. The lines are parallel to each other; a second drive motor is respectively installed on the moving end of the second linear slide on both sides, and the rotating ends of the second drive motors on both sides are oppositely distributed; an inner chamfering cutter is respectively installed on the rotating end of the second drive motor on both sides; a clamping member is located above the support platform along the height direction of the support platform and is used to clamp the bushing; a linear movement module is installed between the thumb cylinder and the clamping member and is configured to drive the clamping member to move along the width and height directions of the support platform; wherein, under the drive of the linear movement module, the clamped bushing can be moved between the two outer chamfering cutters and the two inner chamfering cutters respectively.

[0009] Optionally, the clamping member includes: a U-shaped plate connected to the moving end of the linear moving module; pins passing through the opposite side walls of the U-shaped plate along the length direction of the support platform and located on both sides of the U-shaped plate along the width direction of the support platform; and grippers rotatably mounted on the pins on both sides; wherein the grippers on both sides can be controlled to rotate to clamp the bushing.

[0010] Optionally, the clamping component further includes: a hydraulic cylinder, mounted on the top surface of the U-shaped plate along the height direction of the support platform, with the moving end of the hydraulic cylinder passing through the top wall of the U-shaped plate; and a connecting rod, rotatably mounted between the moving end of the hydraulic cylinder and the two clamping jaws on both sides.

[0011] Optionally, the linear motion module includes: a support plate located above the support platform along the height direction of the support platform; a third linear slide mounted on the support plate along the width direction of the support platform; a third movable plate mounted on the movable end of the third linear slide; a fourth linear slide mounted on the third movable plate along the height direction of the support platform, and the clamping member mounted on the movable end of the fourth linear slide.

[0012] Optionally, the linear motion module further includes a support column, installed between the support plate and the support platform.

[0013] Optionally, it further includes: a first movable plate, respectively mounted on the movable ends of the first linear slides on both sides; a first motor mount, respectively mounted on the first movable plate on both sides; wherein the first drive motors on both sides are respectively mounted on the first motor mounts on both sides.

[0014] Optionally, it further includes: a first pad block, installed on the top surface of the support platform; a first guide rail, installed on the top surface of the first pad block along the length direction of the support platform; and a first slider, slidably installed on the first guide rail and respectively connected to the first movable plates on both sides.

[0015] Optionally, it further includes: a second movable plate, respectively mounted on the movable ends of the second linear slides on both sides; a second motor mount, respectively mounted on the second movable plate on both sides; wherein the second drive motors on both sides are respectively mounted on the second motor mounts on both sides.

[0016] Optionally, it further includes: a second pad block, installed on the top surface of the support platform; a second guide rail, installed on the top surface of the second pad block along the length direction of the support platform; and a second slider, slidably installed on the second guide rail and respectively connected to the second movable plates on both sides.

[0017] The chamfering device for bushing machining provided in this disclosure can achieve the following technical effects:

[0018] This disclosure provides a chamfering device for bushing processing, comprising a support platform, a first linear slide, a first drive motor, an outer chamfering cutter, a second linear slide, a second drive motor, an inner chamfering cutter, a clamping component, and a linear movement module. The first linear slides are mounted on the top surface of the support platform along its length and are located on both sides of the support platform. Both first linear slides provide driving force to achieve linear movement. The first drive motors are respectively mounted on the moving ends of the two first linear slides, with their rotating ends opposite to each other. Driven by the two first linear slides, they move along the length of the support platform. The outer chamfering cutters are respectively mounted on the rotating ends of the two first drive motors and rotate under their drive to chamfer the outer ring of the bushing. The second linear slides are mounted on the top surface of the support platform along its length and are located on both sides of the support platform. Both second linear slides provide driving force to achieve linear movement. The lines containing the second linear slides are parallel to the lines containing the first linear slides. The second drive motors are respectively mounted on the moving ends of the two second linear slides on both sides. The rotating ends of the two second drive motors are opposite to each other and move along the length direction of the support platform under the drive of the two second linear slides. The inner chamfering cutters are respectively mounted on the rotating ends of the two second drive motors on both sides and rotate under the drive of the two second drive motors to chamfer the inner ring of the bushing. The clamping member is located above the support platform along the height direction and is used to clamp the bushing. The linear movement module is installed between the thumb cylinder and the clamping member to provide driving force and drive the clamping member to move along the width and height directions of the support platform. Among them, under the drive of the linear movement module, the clamped bushing can move between the two outer chamfering cutters and the two inner chamfering cutters respectively.

[0019] In use, the bushing is clamped and fixed using the clamping device. Then, driven by the linear motion module, the clamping device moves along the height and width of the support platform, thereby moving the bushing to be polished. When it moves between the two outer chamfering cutters, controlling the first linear slides on both sides activates the first drive motors on both sides, which in turn move the two outer chamfering cutters along the length of the support platform. Controlling the first drive motors on both sides then rotates the two outer chamfering cutters, ultimately chamfering the outer rings at both ends of the bushing. When it moves between the two inner chamfering cutters, controlling the second linear slides on both sides activates the second drive motors on both sides, which in turn move the two inner chamfering cutters along the length of the support platform. Controlling the second drive motors on both sides then rotates the two inner chamfering cutters, ultimately chamfering the inner rings at both ends of the bushing. Therefore, the chamfering of the inner and outer rings at both ends of the bushing can be completed in one clamping, and the feed is automatically completed during the chamfering process.

[0020] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0022] Figure 1 This is a front view structural schematic diagram of a chamfering device for bushing processing provided in an embodiment of this disclosure;

[0023] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0024] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure at point BB;

[0025] Figure 4 This is a side view of a chamfering device for bushing processing provided in an embodiment of this disclosure;

[0026] Figure 5 yes Figure 4 A magnified structural diagram at point C.

[0027] Figure label:

[0028] 1: Support platform; 2: First linear slide; 3: First drive motor; 4: Outer chamfering cutter; 5: Second linear slide; 6: Second drive motor; 7: Inner chamfering cutter; 8: U-shaped plate; 9: Pin; 10: Gripper; 11: Hydraulic cylinder; 12: Connecting rod; 13: Support plate; 14: Third linear slide; 15: Third moving plate; 16: Fourth linear slide; 17: Support column; 18: First moving plate; 19: First motor base; 20: First pad; 21: Second moving plate; 22: Second motor base; 23: Second pad. Detailed Implementation

[0029] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0030] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0031] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better describing the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this disclosure according to the specific circumstances.

[0032] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0033] Unless otherwise stated, the term "multiple" means two or more.

[0034] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0035] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0037] Combination Figures 1 to 5As shown, this embodiment of the present disclosure provides a chamfering device for bushing processing, including a support platform 1, a first linear slide 2, a first drive motor 3, an outer chamfering cutter 4, a second linear slide 5, a second drive motor 6, an inner chamfering cutter 7, a clamping component, and a linear movement module. The first linear slide 2 is mounted on the top surface of the support platform 1 along its length and is located on both sides of the support platform 1. Both first linear slides 2 provide driving force to achieve linear movement. The first drive motors 3 are respectively mounted on the moving ends of the two first linear slides 2, with their rotating ends relatively distributed. Driven by the two first linear slides 2, they move along the length of the support platform 1. The outer chamfering cutters 4 are respectively mounted on the rotating ends of the two first drive motors 3 and rotate under the drive of the two first drive motors 3 to chamfer the outer ring of the bushing. The second linear slide 5 is installed on the top surface of the support platform 1 along its length and is located on both sides of the support platform 1. Both second linear slides 5 provide driving force to achieve linear movement. The lines on both sides of the second linear slides 5 are parallel to the lines on both sides of the first linear slides 2. The second drive motors 6 are respectively installed on the moving ends of the two second linear slides 5, and the rotating ends of the two second drive motors 6 are relatively distributed. Driven by the two second linear slides 5, they move along the length of the support platform 1. The inner chamfering cutter 7 is respectively installed on the rotating ends of the two second drive motors 6 and rotates under the drive of the two second drive motors 6 to chamfer the inner ring of the bushing. The clamping member is located above the support platform 1 along its height and is used to clamp the bushing. The linear movement module is installed between the thumb cylinder and the clamping member to provide driving force and drive the clamping member to move along the width and height of the support platform 1. Driven by the linear motion module, the clamped bushing can move between the two outer chamfering cutters 4 and the two inner chamfering cutters 7 respectively.

[0038] This disclosure provides a chamfering device for bushing processing. A clamping component can clamp and fix the bushing. Then, driven by a linear motion module, the clamping component moves along the height and width of the support platform 1, thereby moving the bushing to be polished. When it moves between two outer chamfering cutters 4, the first linear slides 2 on both sides are activated, which in turn drive the first drive motors 3 on both sides to move along the length of the support platform 1, ultimately moving the outer chamfering cutters 4 along the length of the support platform 1. Activating the first drive motors 3 on both sides causes the outer chamfering cutters 4 to rotate, ultimately chamfering the outer rings at both ends of the bushing. When it moves between two inner chamfering cutters 7, the second linear slides 5 on both sides are activated, which in turn drive the second drive motors 6 on both sides to move along the length of the support platform 1, ultimately moving the inner chamfering cutters 7 along the length of the support platform 1. Activating the second drive motors 6 on both sides causes the inner chamfering cutters 7 to rotate, ultimately chamfering the inner rings at both ends of the bushing. Therefore, the chamfering of the inner and outer rings at both ends of the bushing can be completed in one clamping, and the feed is automatically completed during the chamfering process.

[0039] Optionally, combined Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the clamping component includes a U-shaped plate 8, pins 9, and grippers 10. The U-shaped plate 8 is connected to the moving end of the linear motion module and moves along the width and height directions of the support platform 1 under the drive of the linear motion module. The pins 9 pass through the opposite side walls of the U-shaped plate 8 along the length direction of the support platform 1 and are located on both sides of the U-shaped plate 8 along the width direction of the support platform 1. The two side pins 9 are used to support and install the rotatable grippers 10. The grippers 10 are rotatably mounted on the two side pins 9, and both side grippers 10 include grooves that match the shape of the bushing. The two side grippers can be rotated in a controlled manner to clamp the bushing.

[0040] In this embodiment, the two grippers can engage with each other after being rotated in a controlled manner, thereby clamping the bushing. Furthermore, grooves of different sizes can be made according to the outer diameter of the bushing to accommodate the clamping and fixing of bushings with different outer diameters.

[0041] Optionally, combined Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the clamping component also includes a hydraulic cylinder 11 and a connecting rod 12. The hydraulic cylinder 11 is mounted on the top surface of the U-shaped plate 8 along the height direction of the support platform 1, and the moving end of the hydraulic cylinder 11 passes through the top wall of the U-shaped plate 8 to provide driving force. The connecting rod 12 is rotatably mounted between the moving end of the hydraulic cylinder 11 and the two side grippers 10 to transmit driving force.

[0042] In this embodiment, the hydraulic cylinder 11 is controlled to operate, and the two grippers can clamp or release the bushing under the pulling or pushing of the connecting rods 12 on both sides. At the same time, using the hydraulic cylinder 11 as a power source has the advantage of facilitating a large clamping force, thereby ensuring the stability of the bushing.

[0043] Optionally, combined Figure 1 and Figure 4 As shown, the linear motion module includes a support plate 13, a third linear slide 14, a third moving plate 15, and a fourth linear slide 16. The support plate 13, located above the support platform 1 along its height, supports the mounting of the third linear slide 14. The third linear slide 14, mounted on the support plate 13 along the width of the support platform 1, provides driving force to achieve linear motion. The third moving plate 15 is mounted on the moving end of the third linear slide 14 and moves along the width of the support platform 1 under the drive of the third linear slide 14. The fourth linear slide 16, mounted on the third moving plate 15 along the height of the support platform 1, provides driving force to achieve linear motion. A clamping member is mounted on the moving end of the fourth linear slide 16 and moves along the height of the support platform 1 under the drive of the fourth linear slide 16.

[0044] In this embodiment, controlling the third linear slide 14 to operate causes the third moving plate 15 to move along the width direction of the support platform 1, ultimately causing the clamping member to move along the width direction of the support platform 1. Controlling the fourth linear slide 16 to operate causes the clamping member to move along the height direction of the support platform 1. Therefore, by cooperating with the third linear slide 14 and the fourth linear slide 16, the function of moving the clamping member along both the width and height directions of the support platform 1 can be achieved.

[0045] Optionally, combined Figure 1 , Figure 3 and Figure 4 As shown, the linear motion module also includes a support column 17. The support column 17 is installed between the support plate 13 and the support platform 1.

[0046] In this embodiment of the disclosure, the support column 17 is used to determine the relative position of the support plate 13 and the support platform 1, and to adjust the distance between the support plate 13 and the support platform 1.

[0047] Optionally, combined Figure 3 and Figure 4 As shown, it also includes a first movable plate 18 and a first motor mount 19. The first movable plate 18 is respectively mounted on the movable ends of the first linear slides 2 on both sides. The first motor mount 19 is respectively mounted on the first movable plate 18 on both sides. The first drive motors 3 on both sides are respectively mounted on the first motor mounts 19 on both sides.

[0048] In this embodiment, the two side first movable plates 18 are respectively used to support and install the two side first motor seats 19, so as to improve the stability of the two side first motor seats 19 after installation. The two side first motor seats 19 are respectively used to support and install the two side first drive motors 3, so as to facilitate the subsequent disassembly of the two side first drive motors 3.

[0049] Optionally, combined Figure 4 As shown, it also includes a first pad 20, a first guide rail, and a first slider. The first pad 20 is mounted on the top surface of the support platform 1. The first guide rail is mounted on the top surface of the first pad 20 along the length of the support platform 1. The first slider is slidably mounted on the first guide rail and is connected to the first movable plates 18 on both sides respectively.

[0050] In this embodiment, the first pad 20 serves to support and elevate the first guide rail and the first slider to adjust their positions. The first guide rail and the first slider serve to guide and support, thereby improving the stability of the first moving plate 18 during movement and reducing the force on the moving end of the first linear slide 2.

[0051] Optionally, combined Figure 1 , Figure 3 and Figure 4 As shown, it also includes a second movable plate 21 and a second motor mount 22. The second movable plate 21 is respectively mounted on the movable end of the second linear slides 5 on both sides. The second motor mount 22 is respectively mounted on the second movable plate 21 on both sides. The second drive motors 6 on both sides are respectively mounted on the second motor mounts 22 on both sides.

[0052] In this embodiment, the two side second movable plates 21 are respectively used to support and install the two side second motor seats 22, so as to improve the stability of the two side second motor seats 22 after installation. The two side second motor seats 22 are respectively used to support and install the two side second drive motors 6, so as to facilitate the subsequent disassembly of the two side second drive motors 6.

[0053] Optionally, combined Figure 1 and Figure 4 As shown, it also includes a second pad 23, a second guide rail, and a second slider. The second pad 23 is mounted on the top surface of the support platform 1. The second guide rail is mounted on the top surface of the second pad 23 along the length of the support platform 1. The second slider is slidably mounted on the second guide rail and is connected to the second movable plates 21 on both sides respectively.

[0054] In this embodiment, the second pad 23 serves to support and elevate the second guide rail and the second slider to adjust their positions. The second guide rail and the second slider serve to guide and support, improving the stability of the second moving plate 21 during movement and reducing the force on the moving end of the second linear slide 5.

[0055] The foregoing description and accompanying drawings have fully illustrated embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of this disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A chamfering device for bushing machining, characterized in that, include: Support platform; The first linear slide is installed on the top surface of the support platform along the length of the support platform and is located on both sides of the support platform; The first drive motors are respectively installed on the moving ends of the first linear slides on both sides, and the rotating ends of the first drive motors on both sides are distributed opposite to each other. The outer chamfering cutter is respectively installed on the rotating end of the first drive motor on both sides; The second linear slide is installed on the top surface of the support platform along the length of the support platform and is located on both sides of the support platform. The lines on both sides where the second linear slide is located are parallel to the lines on both sides where the first linear slide is located. The second drive motors are respectively installed on the moving ends of the second linear slides on both sides, and the rotating ends of the second drive motors on both sides are distributed opposite to each other. The inner chamfering cutter is installed on the rotating end of the second drive motor on both sides; The clamping member is located above the support platform along the height direction of the support platform and is used to clamp the bushing; A linear movement module, installed between the thumb cylinder and the clamping member, is configured to drive the clamping member to move along the width and height directions of the support platform; Driven by the linear motion module, the clamped bushing can move between the two outer chamfering cutters and the two inner chamfering cutters.

2. The chamfering device for bushing machining according to claim 1, characterized in that, The clamping element includes: A U-shaped plate is connected to the moving end of the linear motion module; The pins pass through the opposite side walls of the U-shaped plate along the length of the support platform and are located on both sides of the U-shaped plate along the width of the support platform. The grippers are rotatably mounted on the pins on both sides; The grippers on both sides can be rotated in a controlled manner to hold the bushing.

3. The chamfering device for bushing processing according to claim 2, characterized in that, The clamping element further includes: A hydraulic cylinder is installed on the top surface of the U-shaped plate along the height direction of the support platform, and the moving end of the hydraulic cylinder passes through the top wall of the U-shaped plate. The connecting rods are rotatably mounted between the moving end of the hydraulic cylinder and the grippers on both sides.

4. The chamfering device for bushing machining according to claim 1, characterized in that, The linear motion module includes: A support plate is located above the support platform along the height direction of the support platform; The third linear slide is mounted on the support plate along the width direction of the support platform; The third movable plate is installed at the movable end of the third linear slide. A fourth linear slide is mounted on the third movable plate along the height direction of the support platform, and the clamping member is mounted on the movable end of the fourth linear slide.

5. A chamfering device for bushing machining according to claim 4, characterized in that, The linear motion module further includes: A support column is installed between the support plate and the support platform.

6. A chamfering device for bushing machining according to any one of claims 1 to 5, characterized in that, Also includes: The first movable plate is respectively installed on the movable end of the first linear slide on both sides; The first motor mount is respectively installed on the first movable plate on both sides; The first drive motors on both sides are respectively mounted on the first motor mounts on both sides.

7. A chamfering device for bushing machining according to claim 6, characterized in that, Also includes: The first pad is installed on the top surface of the support platform; The first guide rail is installed on the top surface of the first pad along the length of the support platform; The first slider is slidably mounted on the first guide rail and is connected to the first movable plates on both sides respectively.

8. A chamfering device for bushing machining according to any one of claims 1 to 5, characterized in that, Also includes: The second movable plate is installed on the movable end of the second linear slide on both sides; The second motor mount is installed on both sides of the second movable plate; The second drive motors on both sides are respectively mounted on the second motor mounts on both sides.

9. A chamfering device for bushing machining according to claim 8, characterized in that, Also includes: The second pad is installed on the top surface of the support platform; The second guide rail is installed on the top surface of the second pad along the length of the support platform; The second slider is slidably mounted on the second guide rail and is connected to the second movable plates on both sides respectively.

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