WO2020228102A1

WO2020228102A1 - Door leaf lock hole slot machining machine capable of controlling three targets by means of one axis

Info

Publication number: WO2020228102A1
Application number: PCT/CN2019/092918
Authority: WO
Inventors: 姚遥; 张海建; 黄海涛; 邵小璐; 范进; 丁仁杰
Original assignee: 南通跃通数控设备股份有限公司
Priority date: 2019-05-15
Filing date: 2019-06-26
Publication date: 2020-11-19
Also published as: CN109955067A; CN109955067B

Abstract

The invention relates to a door leaf lock hole slot machining machine capable of controlling three targets by means of one axis. The machine comprises: a frame; a column component provided on the frame used for machining one side of a door leaf; a Y-axis transmission component provided on the frame and connected to the column component, used for driving the column component to move horizontally along a Y-axis direction of the frame; and a movable operation platform provided on the frame and corresponding to the column component. The movable operation platform further comprises a fixed platform and a movable platform. The fixed platform is provided on the frame, corresponds to the column component, and is configured perpendicular to the Y-axis direction of the frame. The movable platform is provided between the fixed platform and the column component, and can move horizontally along the Y-axis direction of the frame. The invention uses the Y-axis transmission component to control the column component, the movable platform, and a vertical carriage component to move along the Y axis, thereby achieving the function of controlling three targets by means of one axis.

Description

One-axis three-control door leaf keyhole slot processing machine

Technical field

The invention relates to a keyhole slot processing machine, in particular to a one-axis three-control door leaf keyhole slot processing machine.

Background technique

The keyhole slot processing machine is a kind of processing equipment commonly used in the field of door and window profiles. The keyhole slot processing machine is mainly used for processing doors, door frames, window frames, window doors and hinge steps. Keyhole slot processing machine It is generally composed of milling cutters, worktables and motors.

In the process of implementing the present invention, the inventor found that the prior art has at least the following problems:

The working mode of the keyhole slot processing machine in the prior art is usually that the worktable is fixed, and the movement of the processing parts is controlled by the multi-axis control device to process the keyhole slot such as door leaf; because the multi-axis control device is relatively complicated, the occupied area is also relatively large. Large, low control accuracy, which does not meet the requirements of the prior art for key hole processing machines. Therefore, there is an urgent need for a keyhole slot processing machine that simplifies its control device and can achieve the same function.

Summary of the invention

In order to solve the problems existing in the prior art, the embodiment of the present invention provides a one-axis three-control door lock hole processing machine, and the specific technical solutions are as follows:

In the first aspect, a one-axis three-control door leaf keyhole slot processing machine is provided, wherein the one-axis three-control door leaf keyhole groove processing machine includes:

frame;

The upright part is set on the frame, and the upright part is used to process one side of the door leaf;

The Y-axis transmission component is arranged on the frame and connected with the column component. The Y-axis transmission component is used to drive the column component to move horizontally along the Y-axis direction of the frame;

The movable workbench is set on the rack corresponding to the column components. The movable workbench also includes a fixed table and a movable table. The fixed table and the column components are correspondingly set on the rack, and the fixed table is set perpendicular to the Y-axis direction of the rack. , The movable table is set between the fixed table and the column parts, and the movable table can move horizontally along the Y axis of the frame;

The positioning device is arranged on the column component, the positioning device is driven by the column component to move horizontally along the Y axis of the frame, and the positioning device is used to locate the movable table;

The vertical carriage component is arranged on the frame corresponding to the column component, and the vertical carriage component is used to process the other side of the door leaf; and

The clutch component is connected with the vertical carriage component and the Y-axis transmission component. The Y-axis transmission component drives the vertical carriage component to move horizontally along the Y-axis direction of the frame through the clutch component.

In the first possible implementation of the first aspect, the column component further includes: a column, which is arranged on the frame and connected with the Y-axis transmission component, and the column is driven by the Y-axis transmission component to move along the Y-axis direction of the frame Horizontal movement; the column guide rail is set on the column; the lock hole motor and the lock slot motor are set on the column guide rail, the lock hole motor and the lock slot motor can move up and down along the column guide rail; and the first processing tool, and the lock hole motor and The lock slot motor is connected, and the first processing tool is driven by the lock hole motor and the lock slot motor to process the lock hole slot.

In combination with the first possible implementation of the first aspect, in the second possible implementation of the first aspect, the vertical carriage component further includes: a vertical carriage, which is vertically arranged on the frame corresponding to the column component; and The second processing tool is arranged on the vertical carriage, and the second processing tool is used for processing the hinge groove on the other side of the door leaf.

In combination with the second possible implementation of the first aspect, in the third possible implementation of the first aspect, the clutch component further includes: a connecting shaft, one end of which is connected to the vertical carriage; and a clutch cylinder, which is arranged corresponding to the connecting shaft On the column, the clutch cylinder is driven by the column to move horizontally along the Y axis of the frame. When the clutch cylinder is connected to the connecting shaft, the clutch cylinder drives the vertical carriage to move horizontally along the Y axis of the frame through the connecting shaft. The second processing tool processes the other side of the door leaf.

In a fourth possible implementation manner of the first aspect, the Y-axis transmission component further includes: a driving mechanism, which is arranged on the frame; a Y-axis screw rod, which is arranged on the frame along the Y-axis direction of the frame and is connected with The drive mechanism is connected, the Y-axis screw is driven to rotate through the drive mechanism; and the Y-axis nut seat is arranged on the Y-axis screw and connected with the column component, and the Y-axis nut seat is rotated along the Y-axis direction by the Y-axis screw Moving, the column component is driven by the Y-axis nut seat to move along the Y-axis direction.

In a fifth possible implementation manner of the first aspect, it further includes a side-pushing cylinder component, and the side-pushing cylinder component also includes: a side-pushing cylinder, including a cylinder body and a piston rod that can be extended and retracted on the cylinder body. One end of the table is connected with the movable table; and the cylinder block is arranged under the movable table and connected with the cylinder block and the movable table. The cylinder block is connected with the movable table through the cylinder block. Among them, when the piston rod of the side push cylinder expands and contracts, the movable table is driven to move horizontally along the Y axis of the frame.

In a sixth possible implementation manner of the first aspect, it further includes: a locking cylinder component, which is arranged on the movable platform; and a fixed platform locking groove, which is corresponding to the locking cylinder component and is arranged on the fixed platform to lock the cylinder component The movable platform is fixed by being matched with the locking groove of the fixed platform.

In combination with the sixth possible implementation manner of the first aspect, in the seventh possible implementation manner of the first aspect, the locking cylinder component further includes: a fixed seat, which is arranged on the movable table; and the locking cylinder is arranged on the fixed seat , And located above the locking groove of the fixed platform, the locking cylinder is fixed on the movable platform through the fixed seat; and the pin shaft is connected with the piston rod of the locking cylinder, and the pin shaft is driven by the piston rod of the locking cylinder to insert or Pull out the locking groove of the fixing table.

Compared with the prior art, the present invention has the following advantages:

The one-axis three-control door lock slot processing machine of the present invention controls the movement of the column component, the movable table and the vertical carriage component on the Y-axis through the Y-axis transmission component, realizes the function of one-axis three-control, and also simplifies the lock hole slot The control device of the processing machine has high control accuracy.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative work.

Figures 1 and 2 are schematic views of the structure of a machine for machining a keyhole slot for a one-axis three-control door leaf according to an embodiment of the present invention.

Detailed ways

Regarding the "first", "second", etc. used in this text, they do not specifically refer to the order or sequence, nor are they used to limit the application. They are only used to distinguish between components or operations described in the same technical terms. .

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

In an embodiment of the present invention, please refer to FIGS. 1 and 2, which respectively show the structural schematic diagrams of the one-axis three-control door lock hole processing machine 1 according to an embodiment of the present invention. The one-axis three-control door leaf keyhole slot processing machine 1 includes the frame 2, the column part 3, the Y-axis transmission part 4, the movable table 5, the positioning device 8, the vertical carriage part 7 and the clutch part 11, of which:

The frame 2 is mainly used to provide rigid support for the column part 3, the Y-axis transmission part 4, the movable table 5, the side push cylinder part 6 and the vertical carriage part 7; the structure of the frame 2 is selected in the present invention There may be no special requirements, and the conventional selection of those skilled in the art can be referred to, for example, it may be a rectangular frame structure.

Please refer to Figures 1 and 2 again. The upright part 3 is arranged on the frame 2, and the upright part 3 is used to process one side of the door leaf. The column component 3 disclosed in this embodiment further includes a column 32, a column guide rail 33, a hole-locking motor and a slot-locking motor 34, and a first machining tool 35. The column 32 is arranged on the frame 2 and connected with the Y-axis transmission component 4, The column 32 is driven by the Y-axis transmission component 4 to move horizontally along the Y-axis direction of the frame 2. The Y-axis direction shown in this embodiment is the length direction of the frame 2, but is not limited thereto. The skilled person can also choose another suitable direction as the Y-axis direction according to the teaching of this embodiment, for example, the width direction of the frame 2.

The column 32 disclosed in this embodiment is a rectangular frame structure, but it is not limited thereto. The column guide rail 33 is arranged on the column 32. The column guide rail 33 disclosed in this embodiment is vertically arranged on the column 32, but it is not limited to this. Those skilled in the art can also choose other corresponding settings according to actual processing requirements. The way, for example, can be a horizontal setting.

The lock hole motor and the lock slot motor 34 are arranged on the column guide rail 33. The lock hole motor and the lock slot motor 34 can be raised and lowered along the column guide rail 33. The lifting method can be the lock hole motor and the lock slot motor 34 and a ball screw. The screw rod pair on the structure 31 is connected, and then the ball screw rod is driven to rotate by the driving motor 36, thereby driving the hole-locking motor and the slot-locking motor 34 to go up and down, but not limited to this. In this embodiment, there is no special requirement for the selection of the keyhole motor and the keyhole motor 34, and it is sufficient to refer to the conventional selection of those skilled in the art.

The first machining tool 35 is connected to the key hole motor and the lock slot motor 34. The first machining tool 35 is driven by the key hole motor and the lock slot motor 34 to process the key hole slot. In this embodiment, the first machining tool 35 is selected There may be no special requirements, just refer to the conventional selection of those skilled in the art. However, the structure of the column member 3 is not limited to this, and those skilled in the art can also choose other suitable column members 3 according to the teaching of this embodiment.

Please refer to Figures 1 and 2 again. The Y-axis transmission component 4 is arranged on the frame 2 and connected to the column component 3. The Y-axis transmission component 4 is used to drive the column component 3 to move horizontally along the Y axis of the frame 2. This is the first control of the one-axis three-control door lock hole processing machine 1 of this embodiment. The Y-axis transmission component 4 disclosed in this embodiment further includes a driving mechanism 41, a Y-axis screw 42 and a Y-axis nut seat 43. The driving mechanism 41 is arranged on the frame 2. The driving mechanism 41 is mainly used for the Y-axis screw The rotation of 42 provides the driving force; in this embodiment, there is no special requirement for the selection of the driving mechanism 41, and the conventional selection of those skilled in the art can be referred to, for example, it may be a servo motor.

The Y-axis screw 42 is arranged on the frame 2 along the Y-axis direction of the frame 2 and is connected to the drive mechanism 41. The Y-axis screw 42 disclosed in this embodiment is arranged along the length direction of the first frame 21 On the first frame 21, the driving mechanism 41 is disposed on the first frame 21, but it is not limited to this. The Y-axis screw 42 is driven to rotate by the driving mechanism 41, and the Y-axis nut seat 43 is disposed on the Y-axis screw 42 and connected with the upright member 3.

When the drive mechanism 41 drives the Y-axis screw 42 to rotate, the Y-axis nut holder 43 can move back and forth (linearly) along the Y-axis screw 42. The column member 3 is driven by the Y-axis nut holder 43 to move along the Y-axis direction. The structure of the Y-axis transmission component 4 is not limited to this, and those skilled in the art can also select other suitable structures of the Y-axis transmission component 4 according to the teaching of this embodiment.

Please refer to FIGS. 1 and 2 again. The movable workbench 5 and the column part 3 are correspondingly arranged on the frame 2. The movable workbench 5 is used for placing the door leaf and cooperates with the column part 3 to process the door leaf. The movable table 5 also includes a fixed table 51 and a movable table 52. The fixed table 51 and the column member 3 are correspondingly arranged on the frame 2 and the fixed table 51 is arranged perpendicular to the Y-axis direction of the frame 2.

The movable table 52 is arranged between the fixed table 51 and the column member 3, and is connected with the side pushing cylinder member 6. The movable table 52 is driven by the side pushing cylinder member 6 to move horizontally along the Y-axis direction of the frame 2, and then works The structure of the table 5 is not limited to this, and those skilled in the art can also choose other suitable structures of the movable work table 5 according to the teaching of this embodiment.

In a preferred embodiment, please refer to Figures 1 and 2 again. The one-axis three-control door leaf keyhole slot processing machine 1 also includes a side-pushing cylinder part 6, which is arranged on the frame 2 and is connected to the movable table. 52 is connected, and the side-pushing cylinder part 6 is used to drive the movable table 52 to move horizontally along the Y-axis direction of the frame 2. The number of side pushing cylinder components 6 disclosed in this embodiment is two, and the two side pushing cylinder components 6 are symmetrically arranged on both sides of the movable table 52, but it is not limited to this, and those skilled in the art can also according to actual needs. Choose to set up other numbers of side-pushing cylinder parts 6, for example, when the movable table 52 is large/heavy and requires a lot of power to move it or keep moving smoothly, three, four or five side-pushing cylinder parts can be set 6. In order to increase its driving force and stability, but not limited to this.

The side push cylinder component 6 disclosed in this embodiment further includes a side push cylinder 62 and a cylinder seat 61. The side push cylinder 62 includes a cylinder block and a piston rod that can be telescopically attached to the cylinder block. One end of the side push cylinder 62 is connected to the fixed platform 51, One end is connected to the movable table 52. The piston rod disclosed in this embodiment is connected to the fixed table 51, and the cylinder is connected to the movable table 52, but it is not limited to this. Those skilled in the art can also follow the teaching of this embodiment. Choose other suitable side push cylinder fixing method.

The cylinder block 61 is arranged under the movable table 5 and connected to the cylinder block and the movable table 5. The cylinder block 61 disclosed in this embodiment is connected to the movable table 52, and the cylinder block is connected to the movable table 52 through the cylinder block 61. When the piston rod of the side-pushing cylinder 62 expands and contracts, it drives the cylinder block to move, and the cylinder block drives the movable table 52 to move horizontally along the Y-axis direction of the frame 2. However, the structure of the side-pushing cylinder part 6 is not limited to this. Personnel can choose other suitable structure of the side thrust cylinder part 6 according to the teaching of this embodiment.

Please refer to FIGS. 1 and 2 again. The positioning device 8 is arranged on the column member 3. The positioning device 8 disclosed in this embodiment is a positioning cylinder, but it is not limited thereto. The positioning device 8 is driven by the column member 3 to move horizontally along the Y-axis direction of the frame 2. The positioning device 8 is used for positioning the movable table 52, which is equivalent to the Y-axis transmission member 4 driving the positioning device 8 to perform Positioning, this is the second control of the one-axis three-control door lock hole processing machine 1 of this embodiment. The positioning device 8 and the movable platform 52 disclosed in this embodiment are arranged on the upright member 3 correspondingly. The positioning device 8 can be driven by the upright member 3 to move horizontally along the Y-axis direction of the frame 2. When the side push cylinder 62 drives the movable table After 52 moves to the position of the shaft head of the positioning device 8 on the column, the side pushing cylinder 62 floats. The piston rod of the positioning device 8 extends, pushing the movable table 52 toward the fixed table 51, and pushing the movable table 52 to the working positioning position. The preferred positioning position is the maximum position that the positioning device 8 extends, but this is not the case. Is limited. The number of positioning devices 8 disclosed in this embodiment is two, and the two positioning devices 8 are symmetrically arranged on both sides of the column member 3, but it is not limited thereto.

Please refer to Figures 1 and 2 again. The vertical carriage part 7 and the column part 3 are correspondingly arranged on the frame 2. The vertical carriage part 7 is used to process the other side of the door leaf. The vertical carriage part 7 disclosed in this embodiment is also It includes a vertical carriage 71 and a second processing tool 74. The vertical carriage 71 and the column part 3 are vertically arranged on the frame 2 correspondingly. The second processing tool 74 is arranged on the vertical carriage 71. The second processing tool 74 is used for Processing the other side of the door leaf, however, the structure of the vertical carriage part 7 is not limited to this, and those skilled in the art can also choose other suitable vertical carriage parts 7 according to the teaching of this embodiment.

The clutch component 11 is connected with the vertical carriage component 7 and the Y-axis transmission component 4. The Y-axis transmission component 4 drives the vertical carriage component 7 to move horizontally along the Y-axis direction of the frame through the clutch component 11 to process the other side of the door leaf. This is the third control of the one-axis three-control door lock slot processing machine 1 of this embodiment. Please refer to Figures 1 and 2 again. The clutch component 11 disclosed in this embodiment further includes a connecting shaft 72 and a clutch cylinder 73. One end of the connecting shaft 72 is connected to the vertical carriage 71. The clutch cylinder 73 and the connecting shaft 72 are correspondingly arranged on the column carriage On the plate 71, the clutch cylinder 73 is driven by the column carriage 71 to move horizontally along the Y axis of the frame 2. When the clutch cylinder 73 is connected to the connecting shaft 72, the connection method can be to provide a slot on the connecting shaft 72 721: The clutch cylinder 73 is clamped in the groove 721, but it is not limited to this. The clutch cylinder 73 drives the vertical carriage 71 to move horizontally along the Y axis of the frame 2 through the connecting shaft 72. The second machining tool processes the other side of the door leaf. However, the structure of the vertical carriage component 7 is not limited to this. Those skilled in the art can also choose other suitable vertical carriage parts 7 according to the teaching of this embodiment.

In a preferred embodiment, please refer to Figures 1 and 2 again. The one-axis three-control door leaf lock slot processing machine 1 further includes a locking cylinder component 9 which is arranged on the movable table 52, and the fixed table is locked The groove 10 and the locking cylinder part 9 are correspondingly arranged on the fixed table 51, and the locking cylinder part 9 fixes the movable worktable 5 by matingly connecting with the locking groove 10 of the fixed table, so as to prevent machining errors due to the movement of the worktable during processing. The locking groove 10 of the fixed platform disclosed in this embodiment has a plurality of mating positions connected to the locking cylinder component 9. The mating positions may be, for example, positioning holes, but it is not limited thereto. The locking groove 10 of the fixed platform is connected with the corresponding matching position according to the different positioning positions of the movable platform 52 to fix the movable platform 52, but is not limited thereto.

In a preferred embodiment, please refer to FIGS. 1 and 2 again. The locking cylinder component 9 also includes a fixing seat 91, a locking cylinder 92 and a pin (not shown in the figure), and the fixing seat 91 is arranged on the movable table 52 , The locking cylinder 92 is arranged on the fixed seat 91 and above the locking groove 10 of the fixed platform, the locking cylinder 92 is fixed on the movable platform 52 through the fixed seat 91, and the pin shaft is connected with the piston rod of the locking cylinder 92 , The pin shaft is driven by the piston rod of the locking cylinder 92 to move downward or upward. When the movable table 52 moves to the working position, the locking cylinder 92 drives the pin shaft to move downward, inserting it into the locking groove 10 of the fixed table, and fixing The movable table 52, when the movable table 52 is moved, the locking cylinder 92 drives the pin to move upward, and the fixed table locking groove 10 is pulled out, so that the movable table 52 becomes a free state to move the movable table 52.

The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as the exclusion of other embodiments, but can be applied to various embodiments. Other combinations, modifications, and environments can be modified through the above teachings or technology or knowledge in related fields within the scope of the inventive concept described herein. The modifications and changes made by those skilled in the art do not depart from the spirit and scope of the present invention, and should fall within the protection scope of the appended claims of the present invention.

Claims

A one-axis three-control door lock slot processing machine, characterized in that the one-axis three-control door lock slot processing machine includes:

frame;

The upright component is arranged on the frame, and the upright component is used to process one side of the door leaf;

A Y-axis transmission component is arranged on the frame and connected with the upright component, and the Y-axis transmission component is used to drive the upright component to move horizontally along the Y-axis direction of the frame;

The movable workbench is arranged on the frame corresponding to the upright member, the movable workbench further includes a fixed table and a movable table, the fixed table and the upright member are correspondingly arranged on the rack, so The fixed table is arranged perpendicular to the Y-axis direction of the frame, the movable table is arranged between the fixed table and the column member, and the movable table can be along the Y-axis direction of the frame Move horizontally

A positioning device is arranged on the column component, the positioning device is driven by the column component to move horizontally along the Y-axis direction of the frame, and the positioning device is used for positioning the movable table;

A vertical carriage component, which is provided on the frame corresponding to the upright component, and the vertical carriage component is used for processing the other side of the door leaf; and

A clutch component is connected with the vertical carriage component and the Y-axis transmission component, and the Y-axis transmission component drives the vertical carriage component to move horizontally along the Y-axis direction of the frame through the clutch component;
The one-axis three-control door leaf keyhole slot processing machine according to claim 1, wherein the column component further comprises:

An upright column is arranged on the frame and connected with the Y-axis transmission component, and the upright column is driven by the Y-axis transmission component to move horizontally along the Y-axis direction of the frame;

The column guide rail is arranged on the column;

A lock hole motor and a lock slot motor are arranged on the column guide rail, and the lock hole motor and the lock slot motor can be raised and lowered along the column guide rail; and

The first machining tool is connected with the locking motor and the locking motor, and the first machining tool is driven by the locking motor and the locking motor to process the locking slot.
The one-axis three-control door leaf lock hole processing machine according to claim 1, wherein the vertical carriage component further comprises:

A vertical carriage, which is vertically arranged on the frame corresponding to the upright part; and

The second processing tool is arranged on the vertical carriage, and the second processing tool is used for processing the hinge groove on the other side of the door leaf.
The one-axis three-control door leaf keyhole slot processing machine according to claim 3, wherein the clutch component further comprises:

A connecting shaft, one end of which is connected with the vertical carriage; and

A clutch cylinder is arranged on the column corresponding to the connecting shaft, and the clutch cylinder is driven by the column to move horizontally along the Y-axis direction of the frame. When the clutch cylinder is connected with the connecting shaft The clutch cylinder drives the vertical carriage to move horizontally along the Y-axis direction of the frame through the connecting shaft, and the second processing tool processes the other side of the door leaf.
The one-axis three-control door leaf keyhole slot processing machine according to claim 1, wherein the Y-axis transmission component further comprises:

The driving mechanism is arranged on the frame;

A Y-axis screw rod is arranged on the frame along the Y-axis direction of the frame and is connected to the driving mechanism, and the Y-axis screw rod is driven to rotate by the driving mechanism; and

The Y-axis nut seat is arranged on the Y-axis screw rod and connected with the column member. The Y-axis nut seat moves along the Y-axis direction through the rotation of the Y-axis screw rod, and the column The component is driven by the Y-axis nut seat to move along the Y-axis direction.
The one-axis three-control door leaf keyhole groove processing machine according to claim 1, characterized in that it further comprises a side pushing cylinder component, and the side pushing cylinder component further comprises:

The side-pushing cylinder includes a cylinder body and a piston rod telescopic to the cylinder body. One end of the side-pushing cylinder is connected to a fixed table and one end is connected to the movable table; and

A cylinder block, arranged under the movable workbench and connected with the cylinder block and the movable workbench, and the cylinder block is connected with the movable workbench through the cylinder block;

Wherein, when the piston rod of the side push cylinder expands and contracts, the movable table is driven to move horizontally along the Y axis direction of the frame.
The one-axis three-control door leaf keyhole slot processing machine according to claim 1, characterized in that it further comprises:

Locking the cylinder component, which is arranged on the movable platform; and

A locking groove of the fixed platform is provided on the fixed platform corresponding to the locking cylinder component, and the locking cylinder component is connected to the locking groove of the fixed platform to fix the movable platform.
The one-axis three-control door leaf lock hole processing machine according to claim 7, wherein the locking cylinder component further comprises:

The fixed seat is arranged on the movable platform;

A locking cylinder is arranged on the fixed seat and located above the locking groove of the fixed platform, and the locking cylinder is fixed on the movable platform through the fixed seat; and

The pin shaft is connected with the piston rod of the locking cylinder, and the pin shaft is driven by the piston rod of the locking cylinder to insert or pull out the locking groove of the fixed platform.