A five-axis micro slide

Abstract

The present invention discloses a five-axis micro slide, including a base, an adjustment block, a mounting plate, a first adjustment component, a second adjustment component and a third adjustment component, wherein the adjustment block is pivotally connected to the base and can rotate around the Z axis; the mounting plate is mounted on the top of the adjustment block, and the mounting plate is used to rotate around the X axis and around the Y axis; the mounting plate is used to slide along the X axis and along the Y axis; the first adjustment component is used to drive the adjustment block to rotate around the Z axis; the second adjustment component is used to drive the mounting plate to rotate around the X axis and to drive the mounting plate to rotate around the Y axis; the third adjustment component is used to drive the mounting plate to move along the X axis and to drive the mounting plate to move along the Y axis. The five-axis micro slide of the present invention can realize five-axis motion within a relatively small range.

Description

Technical Field

[0001] The invention relates to the technical field of slides, and in particular to a five-axis micro slide. Background Art

[0002] At present, micro slides are generally used for micro-adjustment of workpieces, that is, small-range adjustment in left-right direction, front-back direction, or angle. The micro slides on the market are mostly four-axis slides, that is, micro-adjustment of X-axis, Y-axis, Z-axis and rotation axis, which are large in size and have many structural parts; and the inclination angle of the slide cannot be adjusted. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a five-axis micro slide which can achieve five-axis motion within a relatively small range.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A five-axis micro slide comprises a base, an adjustment block, a mounting plate, a first adjustment component, a second adjustment component and a third adjustment component, wherein the adjustment block is pivotally connected to the base and can rotate around the Z axis; the mounting plate is mounted on the top of the adjustment block, the mounting plate is used to rotate around the X axis and around the Y axis; the mounting plate is used to slide along the X axis direction and along the Y axis direction; the first adjustment component is used to drive the adjustment block to rotate around the Z axis; the second adjustment component is used to drive the mounting plate to rotate around the X axis and to drive the mounting plate to rotate around the Y axis; the third adjustment component is used to drive the mounting plate to move along the X axis direction and to drive the mounting plate to move along the Y axis direction.

[0006] Furthermore, the first adjustment component includes a first adjustment rod, an adjustment head and a first elastic component; a first adjustment cavity is provided on the base, one end of the adjustment head is connected to the adjustment block, and the other end of the adjustment head extends into the first adjustment cavity; the first adjustment rod and the first elastic component are both installed in the first adjustment cavity; one end of the first adjustment rod is slidably installed in the first adjustment cavity and formed at the first pressing end; the other end of the first adjustment rod is formed as the first adjustment end, and the first adjustment end is used to drive the first pressing end to press the adjustment head when subjected to external force; one end of the first elastic component is connected to the first adjustment cavity, and the other end of the first elastic component is connected to the adjustment head.

[0007] Furthermore, the portion of the regulating head extending into the first regulating cavity is provided with a ball head, and the first pressing end is used for pressing the ball head.

[0008] Furthermore, the second adjustment component includes a second adjustment rod, a pressing member, a first rotating shaft and a second rotating shaft, wherein the first rotating shaft extends along the X-axis direction; the second rotating shaft extends along the Y-axis; the movable cavity extends along the Z-axis; the mounting plate is rotatably mounted on the adjustment block through the first rotating shaft and the second rotating shaft; the adjustment block is provided with two second adjustment cavities and four movable cavities, the two second adjustment cavities are distributed on both sides of the first rotating shaft; two movable cavities are distributed on both sides of the first rotating shaft; two movable cavities are distributed on both sides of the second rotating shaft; the two first adjustment cavities are respectively connected to two of them The bottom end of the movable cavity; a second elastic component is arranged in the other two movable cavities; one end of the second elastic component abuts against the bottom wall of the movable cavity; the other end of the second elastic component abuts against the mounting plate through the pressing member; the pressing member is installed in the movable cavity and can extend into the second adjusting cavity; one end of the second adjusting rod is slidably installed in the second adjusting cavity and formed at the second pressing end; the other end of the second adjusting rod is formed as the second adjusting end, and the second adjusting end is used to drive the second pressing end to press the pressing member when subjected to external force, so that the pressing member presses the mounting plate upward.

[0009] Furthermore, the pressing member includes at least two balls, wherein the bottom end of one of the balls extends into the second regulating cavity; and the top end of the other ball is used to abut against the mounting plate.

[0010] Furthermore, a friction block is clamped between the pressing member and the mounting plate.

[0011] Furthermore, the third adjustment assembly includes a third adjustment rod and a third elastic component, and the third adjustment rod and the third elastic component are respectively provided on both sides of the mounting plate along the Y-axis; the third adjustment rod and the third elastic component are respectively provided on both sides of the mounting plate along the X-axis direction; one end of the third adjustment rod is formed as a third adjustment end; the other end of the third adjustment rod is movably connected to the mounting plate; the third adjustment end is used to drive the third adjustment rod to move when subjected to external force to drive the mounting plate to move; the third elastic component is movably connected to the mounting plate and is used to drive the mounting plate to move; the third elastic component is clamped between the mounting plate and the adjustment block.

[0012] Furthermore, the adjusting block is pivotally connected to the base via a bearing; and a friction plate is clamped between the adjusting block and the base.

[0013] Furthermore, a fourth adjusting rod, a first through-hole, a second through-hole, a first push rod and a second push rod are provided in the adjusting block; the second through-hole is connected to the first through-hole; the first push rod is movably connected to the first through-hole, and the second push rod is movably connected to the second through-hole; one end of the fourth adjusting rod is formed as a fourth adjusting end, and the other end of the fourth adjusting rod is movably connected to the first through-hole; the fourth adjusting end is used to drive the fourth adjusting rod to move toward the first push rod to press the bottom end of the second push rod when subjected to force; the second push rod is used to move along the second through-hole after being pressed.

[0014] Furthermore, a first inclined surface is provided at the end of the first push rod, and a second inclined surface is provided at the bottom end of the second push rod, and the first inclined surface is slidably matched with the second inclined surface.

[0015] Compared with the prior art, the beneficial effects of the present invention are: it can realize micro-adjustment in the X and Y directions while also realizing micro-angle adjustment of the X and Y axes and greatly reducing the size of the structural space; it utilizes the cooperation of bearings and friction plates to ensure the structural strength and precision of the five-axis micro-slide while also being able to perform micro-rotation adjustment, greatly increasing the degree of freedom of the five-axis micro-slide device; it can realize the function of a conventional slide while also realizing the micro-adjustment function of the slide's inclination angle; it has a compact and reliable structure, occupies little equipment space, can be installed upright, inverted, or sideways in the equipment, and is flexible and changeable in installation; it can be widely used in any mechanism module that requires manual micro-adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the five-axis micro slide of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the first adjustment component inside the five-axis micro slide of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the second adjustment component inside the five-axis micro slide of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the third adjustment component inside the five-axis micro slide of the present invention;

[0020] Figure 5 It is a schematic diagram of the assembly structure of the fourth adjustment rod, the first push rod and the second push rod inside the five-axis micro slide of the present invention;

[0021] Figure 6 It is a schematic diagram of the exploded structure inside the five-axis micro slide of the present invention.

[0022] In the figure: 10, base; 20, adjusting block; 30, mounting plate; 41, first adjusting rod; 42, adjusting head; 43, first elastic component; 51, second adjusting rod; 52, pressing piece; 53, second elastic component; 54, second adjusting chamber; 55, movable chamber; 56, friction block; 61, third adjusting rod; 62, third elastic component; 70, bearing; 80, friction plate; 91, fourth adjusting rod; 92, first push rod; 93, second push rod. DETAILED DESCRIPTION

[0023] Below, the present invention is further described in conjunction with the accompanying drawings and specific embodiments:

[0024] like Figure 1-6 A five-axis micro slide shown in the figure includes a base 10, an adjustment block 20, a mounting plate 30, a first adjustment component, a second adjustment component and a third adjustment component. The adjustment block 20 is pivotally connected to the base 10, and the adjustment block 20 can rotate around the Z axis. In addition, the mounting plate 30 is mounted on the top of the adjustment block 20, and the mounting plate 30 can rotate around the X axis, and the mounting plate 30 can also rotate around the Y axis. The mounting plate 30 can slide along the X axis direction, and the mounting plate 30 can also slide along the Y axis direction, that is, the mounting plate 30 can rotate around the Z axis with the adjustment block 20, and at the same time, the mounting plate 30 can also rotate around the X axis relative to the adjustment block 20, and the mounting plate 30 can also rotate around the Y axis. The mounting plate 30 can slide along the X axis direction, and the mounting plate 30 can also slide along the Y axis direction. In this way, the mounting plate 30 has five degrees of freedom of movement.

[0025] Specifically, the above-mentioned first adjustment component is used to drive the adjustment block 20 to rotate around the Z axis; the second adjustment component is used to drive the mounting plate 30 to rotate around the X axis, and is used to drive the mounting plate 30 to rotate around the Y axis; the third adjustment component is used to drive the mounting plate 30 to move along the X axis direction, and is used to drive the mounting plate 30 to move along the Y axis direction.

[0026] On the basis of the above structure, when using the five-axis micro slide of the present invention, the workpiece can be placed on the mounting plate 30, and the mounting plate 30 can rotate around the Z axis along with the adjustment block 20. At the same time, the mounting plate 30 can also rotate around the X axis relative to the adjustment block 20, and the mounting plate 30 can also rotate around the Y axis. The mounting plate 30 can slide along the X axis direction, and the mounting plate 30 can also slide along the Y axis direction. In this way, the mounting plate 30 has five degrees of freedom of movement, which can drive the workpiece on the mounting plate 30 to realize the micro displacement adjustment in the X and Y directions, and also realize the micro angle adjustment of the X and Y axes. In addition, the workpiece can also rotate around the Z axis to realize five-axis adjustment, realizing the conventional slide function and also realizing the micro adjustment function of the slide's inclination angle, which greatly increases the degree of freedom of the five-axis micro slide device, and is widely used in any mechanism module that requires manual micro adjustment.

[0027] Specifically, see Figure 2 as well as Figure 6 The first adjustment assembly includes a first adjustment rod 41, an adjustment head 42 and a first elastic component 43. A first adjustment cavity is provided on the base 10. One end of the adjustment head 42 is connected to the adjustment block 20, and the other end of the adjustment head 42 extends into the first adjustment cavity. The first adjustment rod 41 and the first elastic component 43 are both installed in the first adjustment cavity, and the portion of the adjustment head 42 extending into the first adjustment cavity can be located between the first elastic component 43 and the first adjustment rod 41.

[0028] One end of the first adjusting rod 41 is slidably installed in the first adjusting cavity and formed at the first pressing end, while the other end of the first adjusting rod 41 is formed as the first adjusting end. The first adjusting end can drive the first pressing end to move toward the inside of the first adjusting cavity under the action of force to press the adjusting head 42. One end of the first elastic component 43 is connected to the first adjusting cavity, and the other end of the first elastic component 43 is connected to the adjusting head 42.

[0029] On the basis of this structure, when the mounting plate 30 is driven to rotate around the Z axis, the first adjusting rod 41 can be manually adjusted so that the first adjusting rod 41 enters the first adjusting cavity and presses the adjusting head 42 connected to the adjusting block 20. The adjusting head 42 can face the first elastic component 43, and the linear motion of the adjusting head 42 is limited. The adjusting block 20 and the base 10 have rotational freedom, so the adjusting head 42 can drive the adjusting block 20 to rotate when pressed. Due to manual adjustment, the rotation range is limited, thereby achieving fine adjustment. When resetting, the first elastic component 43 is reset, and the elastic stress provided can drive the adjusting head 42 to reset.

[0030] Furthermore, the part of the adjusting head 42 extending into the first adjusting cavity is provided with a ball head, and the first pressing end is used to press the ball head. When the first pressing end contacts the ball head, the first pressing end makes point contact with the arc surface of the ball head. In the process of the first pressing end gradually going deeper, it contacts with different points of the arc surface of the ball head, thereby pushing the adjusting block 20 to rotate, and the rotation process is smooth.

[0031] Of course, the first elastic member 43 may be a spring, and the ball head may be better engaged with the spring. In addition, the portion of the adjusting head 42 extending into the first adjusting cavity may also be provided with only an cambered surface.

[0032] Furthermore, the second adjustment assembly includes a second adjustment rod 51, a pressing member 52, a first rotating shaft and a second rotating shaft, the first rotating shaft extends along the X-axis direction, and the second rotating shaft extends along the Y-axis; the movable cavity 55 extends along the Z-axis. The above-mentioned mounting plate 30 is rotatably mounted on the adjustment block 20 through the first rotating shaft and the second rotating shaft. In this embodiment, the first rotating shaft and the second rotating shaft are distributed on the adjustment block 20 in a "cross" shape and connected to the mounting plate 30, so that the structure is compact.

[0033] See also Figure 3 as well as Figure 6 Specifically, two second adjusting chambers 54 and four movable chambers 55 are provided on the adjusting block 20, and the two second adjusting chambers 54 are distributed on both sides of the first rotating shaft; two movable chambers 55 are distributed on both sides of the first rotating shaft; two movable chambers 55 are distributed on both sides of the second rotating shaft, that is, the four movable chambers 55 can be distributed around the mounting plate 30, and the above-mentioned two first adjusting chambers are respectively connected to the bottom ends of two of the movable chambers 55; second elastic components 53 are provided in the other two movable chambers 55; one end of the second elastic component 53 abuts against the bottom wall of the movable chamber 55; the other end of the second elastic component 53 abuts against the mounting plate 30 through the top pressure piece 52.

[0034] The pressing piece 52 is installed in the movable cavity 55 and can extend into the second adjusting cavity 54. One end of the second adjusting rod 51 is slidably installed in the second adjusting cavity 54 and formed at the second pressing end. The other end of the second adjusting rod 51 extends out of the second adjusting cavity 54 and forms a second adjusting end. The second adjusting end is used to drive the second pressing end to press the pressing piece 52 when subjected to external force, so that the pressing piece 52 presses the mounting plate 30 upward.

[0035] When adjusting the angle around the X-axis, the second adjusting end located on one side of the first rotating shaft can be manually operated to move the second pressing end toward the bottom end of the pressing piece 52, and the pressing piece 52 can move upward along the movable cavity 55. The top end of the pressing piece 52 can push the mounting plate 30 upward to rotate the mounting plate 30 around the first rotating shaft. The pressing piece 52 and the second adjusting rod 51 in the second adjusting cavity 54 on the other side of the first rotating shaft do not need to operate, and the second elastic component 53 in the movable cavity 55 on the other side of the first rotating shaft is compressed to facilitate later reset.

[0036] When adjusting the angle around the Y-axis, the second adjusting end located on the same side of the second rotating shaft can be manually operated at the same time to move the second pressing end toward the bottom end of the pressing member 52, and the pressing member 52 can move upward along the movable cavity 55. The top end of the pressing member 52 can push the mounting plate 30 upward to rotate the mounting plate 30 around the second rotating shaft. The second elastic component 53 in the movable cavity 55 on the other side of the second rotating shaft is compressed to facilitate later reset.

[0037] More specifically, the top pressure piece 52 includes at least two balls, so that the bottom end of one of the balls extends into the second adjustment cavity 54; the top end of the other ball is used to abut against the mounting plate 30, so that when the second adjustment rod 51 moves toward the inside of the second adjustment cavity 54, it can push the ball located in the second adjustment cavity 54, thereby driving the other balls in the movable cavity 55 to move upward, thereby pushing the mounting plate 30 upward, and since the ball has an arc surface, it is convenient for it to be pushed when it contacts the second adjustment end.

[0038] It should be noted that the above-mentioned rotation around the X-axis direction and the Y-axis direction are both controlled by the movement of the second adjustment rod 51, so the adjustment range is small, and micro-adjustment is achieved.

[0039] Of course, the above-mentioned second adjustment end can be provided with a slope, which gradually tilts upward from the inside of the second adjustment chamber 54 to the outside. Therefore, when the second adjustment end moves toward the inside of the second adjustment chamber 54, the ball can move upward along the slope, and the force decomposed by the slope can drive the ball to move upward along the active chamber 55, making the push smoother.

[0040] In addition, the above-mentioned first rotating shaft and second rotating shaft can be realized by two short shafts in the prior art, that is, the two short shafts form a first rotating shaft, and the two short shafts are distributed on both sides of the adjustment block 20 in the Y-axis direction; the two short shafts form a second rotating shaft, and the two short shafts are distributed on both sides of the adjustment block 20 in the X-axis direction, and the short shafts are both connected to the adjustment block 20 through a sliding sleeve. During the rotation process, the friction between the sliding sleeve and the adjustment block 20 is used to protect the shaft.

[0041] Furthermore, a friction block 56 may be clamped between the top pressure piece 52 and the mounting plate 30 , so that the mounting plate 30 can be made wear-resistant.

[0042] Further, the third adjustment assembly includes a third adjustment rod 61 and a third elastic component 62. Specifically, the third adjustment rod 61 and the third elastic component 62 are respectively provided on both sides of the mounting plate 30 along the Y axis; the third adjustment rod 61 and the third elastic component 62 are respectively provided on both sides of the mounting plate 30 along the X axis. Specifically, one end of the third adjustment rod 61 is formed as a third adjustment end; the other end of the third adjustment rod 61 is movably connected to the mounting plate 30, and when the third adjustment end is subjected to external force, the third adjustment rod 61 can be driven to move to drive the mounting plate 30 to move; the third elastic component 62 can be movably connected to the mounting plate 30 and is used to drive the mounting plate 30 to move; the third elastic component 62 is clamped between the mounting plate 30 and the adjustment block 20.

[0043] On the basis of this structure, when adjusting the position of the mounting plate 30 in the X-axis direction, the third adjustment end in the X-axis direction can be manually adjusted, and the third adjustment end moves toward the inside of the mounting plate 30. The third adjustment end can drive the mounting plate 30 to move along the X-axis direction. At this time, the third elastic component 62 is compressed, which is convenient for later reset.

[0044] When adjusting the position of the mounting plate 30 in the Y-axis direction, the third adjustment end in the Y-axis direction can be manually adjusted. The third adjustment end moves toward the inside of the mounting plate 30, and the third adjustment end can drive the mounting plate 30 to move along the Y-axis direction. At this time, the third elastic component 62 is compressed, which is convenient for later resetting.

[0045] Furthermore, the adjusting block 20 is pivotally connected to the base 10 via a bearing 70 ; a friction plate 80 is clamped between the adjusting block 20 and the base 10 .

[0046] Further, see Figure 5 A fourth adjusting rod 91, a first through hole, a second through hole, a first push rod 92 and a second push rod 93 may also be provided in the adjusting block 20, the second through hole is connected to the first through hole, the first push rod 92 is movably connected to the first through hole, and the second push rod 93 is movably connected to the second through hole.

[0047] One end of the fourth adjusting rod 91 is formed as a fourth adjusting end, and the other end of the fourth adjusting rod 91 is movably connected to the first through hole; the fourth adjusting end is used to drive the fourth adjusting rod 91 to move toward the first push rod 92 to press the bottom end of the second push rod 93 when subjected to force; the second push rod 93 is used to move along the second through hole after being pressed.

[0048] After the above-mentioned position adjustment is completed, the fourth adjustment end can be manually adjusted, and the other end of the fourth adjustment end can move toward the inside of the first through hole, driving the first push rod 92 to move inward, and the first push rod 92 can drive the second push rod 93 to move upward and pass through the second through hole. At this time, the fourth adjustment rod 91, the first push rod 92, and the second push rod 93 are all passed through the adjustment block 20 to ensure the rigidity of the five-axis micro slide during use.

[0049] Furthermore, the end of the first push rod 92 is provided with a first inclined surface, and the bottom end of the second push rod 93 is provided with a second inclined surface, and the first inclined surface and the second inclined surface are slidably matched, so that when the fourth adjustment end drives the fourth adjustment rod 91 to advance, the first push rod 92 can be driven to advance, and the first inclined surface of the first push rod 92 can cooperate with the second inclined surface to decompose the force, convert the lateral force into the longitudinal force, and drive the second push rod 93 upward. Of course, the bottom end of the second push rod 93 can also be provided with an arc surface.

[0050] It should be noted that the first adjusting rod 41, the second adjusting rod 51, the third adjusting rod 61 and the fourth adjusting rod 91 in this embodiment can all be selected as screws or bolts, which can be directly turned to the screws or bolts, and the screws or bolts can cooperate with the corresponding adjusting cavity threads to achieve advancement or withdrawal.

[0051] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. A five-axis micro slide, characterized in that: The invention comprises a base, an adjusting block, a mounting plate, a first adjusting component, a second adjusting component and a third adjusting component, wherein the adjusting block is pivotally connected to the base and can rotate around the Z axis; the mounting plate is mounted on the top end of the adjusting block, and the mounting plate is used to rotate around the X axis and around the Y axis; the mounting plate is used to slide along the X axis direction and along the Y axis direction; the first adjusting component is used to drive the adjusting block to rotate around the Z axis; the second adjusting component is used to drive the mounting plate to rotate around the X axis and to drive the mounting plate to rotate around the Y axis; the third adjusting component is used to drive the mounting plate to move along the X axis direction and to drive the mounting plate to move along the Y axis direction; the first adjusting component comprises a first adjusting rod, an adjusting head and a first elastic component; a first adjusting cavity is provided on the base, one end of the adjusting head is connected to the adjusting block, and the other end of the adjusting head extends into the first adjusting cavity; the first adjusting rod and the first elastic component are both installed in the first adjusting cavity; One end of the first adjusting rod is slidably installed in the first adjusting cavity and forms a first pressing end; the other end of the first adjusting rod is formed as a first adjusting end, and the first adjusting end is used to drive the first pressing end to press the adjusting head when subjected to external force; one end of the first elastic component is connected to the first adjusting cavity, and the other end of the first elastic component is connected to the adjusting head; the part of the adjusting head extending into the first adjusting cavity is provided with a ball head, and the first pressing end is used to press the ball head; The second adjustment assembly includes a second adjustment rod, a pressing piece, a first rotating shaft and a second rotating shaft, the first rotating shaft extends along the X-axis direction; the second rotating shaft extends along the Y-axis; the movable cavity extends along the Z-axis; the mounting plate is rotatably mounted on the adjustment block through the first rotating shaft and the second rotating shaft; the adjustment block is provided with two second adjustment cavities and four movable cavities, the two second adjustment cavities are distributed on both sides of the first rotating shaft; there are two movable cavities on both sides of the first rotating shaft; there are two movable cavities on both sides of the second rotating shaft; the two first adjustment cavities are respectively connected to the bottom ends of two of the movable cavities; a second elastic component is provided in the other two movable cavities; one end of the second elastic component abuts against the bottom wall of the movable cavity; the other end of the second elastic component abuts against the mounting plate through the pressing piece; the pressing piece is installed in the movable cavity and can extend into the second adjustment cavity; One end of the second adjusting rod is slidably installed in the second adjusting cavity and formed at the second pressing end; the other end of the second adjusting rod is formed as the second adjusting end, and the second adjusting end is used to drive the second pressing end to press the pressing member when subjected to external force, so that the pressing member presses the mounting plate upward; The pressing member includes at least two balls, the bottom end of one of the balls extends into the second regulating cavity; the top end of the other ball is used to abut against the mounting plate; a friction block is clamped between the pressing member and the mounting plate; The third adjusting assembly includes a third adjusting rod and a third elastic component, wherein the third adjusting rod and the third elastic component are respectively provided on both sides of the mounting plate along the Y-axis; the third adjusting rod and the third elastic component are respectively provided on both sides of the mounting plate along the X-axis direction; one end of the third adjusting rod is formed as a third adjusting end; the other end of the third adjusting rod is movably connected in the mounting plate; the third adjusting end is used to drive the third adjusting rod to move when subjected to external force so as to drive the mounting plate to move; the third elastic component is movably connected to the mounting plate and is used to drive the mounting plate to move; the third elastic component is clamped between the mounting plate and the adjusting block; the adjusting block is pivotally connected to the base through a bearing; a friction plate is clamped between the adjusting block and the base; The adjusting block is provided with a fourth adjusting rod, a first through-hole, a second through-hole, a first push rod and a second push rod; the second through-hole is connected to the first through-hole; the first push rod is movably connected to the first through-hole, and the second push rod is movably connected to the second through-hole; one end of the fourth adjusting rod is formed as a fourth adjusting end, and the other end of the fourth adjusting rod is movably connected to the first through-hole; the fourth adjusting end is used to drive the fourth adjusting rod to move toward the first push rod to press the bottom end of the second push rod when subjected to force; the second push rod is used to move along the second through-hole after being pressed; the end of the first push rod is provided with a first inclined surface, and the bottom end of the second push rod is provided with a second inclined surface, and the first inclined surface is slidably matched with the second inclined surface.

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