An automatic centering and clamping system for elevator guide rail planing

Abstract

The present invention relates to the technical field of planer parts, and specifically discloses an automatic centering and clamping system for planing processing of elevator guide rails, comprising a machine body and a processing platform slidably mounted on the top of the machine body, a tool holder is arranged above the processing platform, and a synchronous centering mechanism is arranged between the tool holder and the processing platform, wherein the synchronous centering mechanism comprises a plurality of mounting boxes fixedly mounted on the top of the processing platform, and a guide rail is placed between two adjacent mounting boxes. In the present application, no additional power source is required during the descending process of the tool holder, and the inclined surface transmission of the upper wedge plate and the lower wedge plate is driven by the lifting platform to synchronously convert the vertical displacement into a horizontal centering force, so that the clamping plate automatically completes the guide rail clamping when the tool holder approaches the processing position, and the centering and clamping action is completely embedded in the movement path of the tool holder, thereby avoiding the time loss of the centering and processing step-by-step operations, and realizing the integrated effect of one descent and multiple actions.

Description

Technical Field

[0001] The present invention relates to the technical field of planer components, and more particularly to an automatic centering and clamping system for planing elevator guide rails. Background Art

[0002] Elevator guide rails are the core guide components of elevator operation, and their machining accuracy directly affects the stability and safety of the elevator. In the T-section structure of the elevator guide rail, the guide working surfaces on both sides of the web are the key functional surfaces that contact the guide shoes and must meet strict requirements for dimensional accuracy, parallelism, and surface roughness. Currently, in the planing process of elevator guide rails, an automatic centering and clamping system for elevator guide rail planing, such as the one disclosed in the Chinese invention patent with authorization announcement number CN115805335B, can perform centering and clamping operations on elevator guide rails, but it still has certain defects:

[0003] 1. The centering and machining processes are independent of each other and require an additional power source to perform the centering and clamping actions step by step. The centering components need to be driven by hydraulic cylinders to complete the multi-stage action of rising-rotating-descending, resulting in poor continuity of the machining process and the need to improve production efficiency. In addition, during the centering process, the middle part of the guide rail needs to be centered before it is gradually extended to both ends. However, the guide rail is a rigid component. After the middle section is fixed, when the centering components at both ends push the guide rail to move, the middle section will act as a fulcrum to produce a lever effect. If the displacement that needs to be adjusted at both ends is large, the middle fixed section will limit the free movement of the ends, causing the guide rail to be forced to bear bending stress and produce plastic deformation or elastic deformation. The adjustment of each section will produce a reaction force on the fixed section. This stress is released after the planing process, which may cause the straightness of the guide rail to deteriorate.

[0004] 2. Only single-point constraint on the top surface of the guide rail is achieved by pressing down on the pressure plate, which cannot effectively limit the multi-directional displacement of the guide rail. During the planing process, the single top surface pressure is easily affected by vibration, causing the guide rail to deviate, and there is a lack of a rigid locking mechanism in the centering state. The clamping force is maintained by relying solely on the pressure plate, resulting in the constraint of the guide rail being limited to a single dimension. It is difficult to resist the displacement of the wedge plate caused by the cutting force, and it is easy to have fluctuations in processing accuracy caused by vibration or uneven force, resulting in the need to improve the subsequent planing accuracy. Summary of the Invention

[0005] The present invention provides an automatic centering and clamping system for elevator guide rail planing processing to solve the above technical problems.

[0006] The present invention provides an automatic centering and clamping system for elevator guide rail planing processing, which includes a machine body and a processing platform slidably installed on the top of the machine body, a tool holder is arranged above the processing platform, and a synchronous centering mechanism is arranged between the tool holder and the processing platform. The synchronous centering mechanism includes a plurality of mounting boxes fixedly installed on the top of the processing platform, and the guide rail is placed between two adjacent mounting boxes.

[0007] A centering component for automatically centering the guide rail as the tool holder approaches the processing platform is provided inside the installation box, a control component for controlling the centering component as the tool holder moves is provided on the top of the installation box, and a locking mechanism is provided on the top of the installation box. The locking mechanism includes a locking component for locking the centering component as the tool holder approaches the processing platform and an extrusion part for extruding the locking component.

[0008] A fixing mechanism is provided on the side of the extrusion piece away from the installation box (43), and the fixing mechanism comprises a plug-in assembly for plugging and fixing the extrusion piece and an unlocking assembly for unlocking the fixing mechanism as the tool holder moves away from the processing platform.

[0009] Furthermore, a gantry is mounted above the machine body, a mounting seat is fixedly mounted on the gantry, a lifting platform is slidably mounted on the mounting seat, and the tool holder is fixedly mounted on a side of the lifting platform away from the mounting seat.

[0010] Furthermore, the centering component includes several reset springs symmetrically installed on the inner walls on both sides of the installation box along the Y-axis direction, and several reset springs on the same side are jointly installed with an L-shaped sliding plate at one end away from the installation inner wall. The horizontal section of the L-shaped sliding plate slides through the installation box, and a splint is fixedly installed on the side of the L-shaped sliding plate away from the installation box.

[0011] Furthermore, the control assembly includes a control plate slidably mounted on the bottom inner wall of the installation box, a plurality of pressure grooves are provided on the side of the L-shaped sliding plate close to the control plate, and a plurality of slopes are provided on the side of the control plate close to the pressure grooves to match the corresponding pressure grooves.

[0012] Furthermore, two fixed plates symmetrical to each other along the Y-axis direction are fixedly installed on the top of the installation box, an upper wedge plate is slidably installed between the two fixed plates, the upper wedge plate slides through the top inner wall of the installation box, a driving plate is fixedly installed on the top of the upper wedge plate through a strong spring, two limit rods are fixedly installed on the bottom of the driving plate, the two limit rods slide through the two fixed plates respectively, a lower wedge plate matching the upper wedge plate is fixedly installed on the top of the control plate, and a second reset spring is fixedly installed between the lower wedge plate and the inner wall of the installation box on the side close to the L-shaped sliding plate.

[0013] Furthermore, the locking assembly includes a fixing sleeve fixedly mounted on the top of the mounting box and a pressure plate fixedly mounted on the side of the fixing sleeve away from the mounting box through three return springs. A locking rod sliding through the fixing sleeve is fixedly mounted on the side of the pressure plate close to the fixing sleeve, and a locking groove is provided on the upper wedge plate which is penetrated and cooperates with the locking rod.

[0014] Furthermore, the extrusion piece is L-shaped and fixedly mounted on the side of the driving plate away from the mounting box, and a slope matching the pressure plate is provided on the bottom of the extrusion piece close to the fixing sleeve.

[0015] Furthermore, the plug-in assembly includes a mounting plate fixedly mounted on the top of the body, a spring telescopic rod fixedly mounted on the side of the mounting plate close to the mounting box, a movable plate fixedly mounted on the telescopic end of the spring telescopic rod, an insert fixedly mounted on the side of the movable plate close to the mounting box, and a slot matching the insert being provided on the extruded piece.

[0016] Furthermore, the unlocking assembly includes two mounting rods fixedly mounted on the bottom of the lifting platform and symmetrical to each other along the Y-axis direction. The bottom ends of the mounting rods are integrally formed with extrusion blocks, and unlocking blocks that cooperate with the corresponding extrusion blocks are fixedly mounted on the parallel sides of the moving track of the moving plate.

[0017] Furthermore, a hydraulic cylinder is fixedly mounted on the mounting seat, and an output end of the hydraulic cylinder is fixedly connected to the lifting platform.

[0018] The beneficial effects of the present invention are:

[0019] 1. In the present application, no additional power source is required during the descent of the tool holder. The driving plate is squeezed by the lifting platform to drive the inclined transmission of the upper wedge plate and the lower wedge plate, and the vertical displacement is synchronously converted into a horizontal centering force, so that the splint automatically completes the guide rail clamping when the tool holder approaches the processing position, and the centering and clamping action is completely embedded in the movement path of the tool holder, avoiding the time loss of centering and processing step-by-step operations, and realizing the integrated effect of one descent and multiple actions, so that the entire centering and clamping process is naturally connected with the planing process, which greatly improves the continuity and production efficiency of the processing flow. In addition, the splint moves synchronously toward the center, so that the side surfaces of the entire guide rail are subjected to uniform clamping force at the same time, so that the guide rail is in an overall free adjustment state during centering, and each part can adaptively fit the splint according to the actual bending conditions.

[0020] 2. In the present application, a centering system from centering to clamping to integrated locking is constructed through mechanical constraints. After the centering component realizes the centering and clamping of the guide rail through the wedge plate transmission, the locking component converts the vertical pressure into horizontal thrust with the help of the continuous downward movement of the driving plate, so that the locking rod is quickly inserted into the locking groove, and the centering state is locked with a rigid pin to avoid the displacement of the wedge plate caused by vibration. The fixing component utilizes the downward movement of the extrusion part and completes the mechanical connection between the plug and the slot through the automatic thrust of the spring telescopic rod, forming a vertical constraint on the extrusion part, and then indirectly fixing the horizontal position of the locking rod, upgrading the single-point constraint of the existing clamping method to an omnidirectional constraint in three-dimensional space, ensuring that the guide rail always remains stable during the processing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 This invention Figure 1 A partial enlarged view of part A.

[0023] Figure 3 It is a partial three-dimensional structural diagram of the synchronous centering mechanism, locking mechanism and fixing mechanism of the present invention.

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the return spring 1, L-shaped sliding plate and clamping plate of the present invention.

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the fixing sleeve, return spring 3, pressure plate, locking rod, locking groove and extrusion part of the present invention.

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the mounting plate, spring telescopic rod, movable plate and inserting block of the present invention.

[0027] Figure 7 It is a partial three-dimensional structural diagram of the mounting rod and the extrusion block of the present invention.

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the L-shaped sliding plate, the clamping plate, the control plate, the pressure groove and the return spring of the present invention.

[0029] Figure: 1. Machine body; 2. Guide rail; 3. Processing platform; 4. Synchronous centering mechanism; 41. Centering assembly; 411. Return spring 1; 412. L-shaped sliding plate; 413. Clamping plate; 42. Control assembly; 421. Control plate; 422. Pressure groove; 423. Lower wedge plate; 424. Return spring 2; 425. Fixed plate; 426. Power spring; 427. Drive plate; 428. Upper wedge plate; 429. Limit rod; 43. Mounting box; 5. Locking mechanism; 51. Locking assembly Parts; 511, fixing sleeve; 512, return spring three; 513, pressure plate; 514, locking rod; 515, locking groove; 52, extrusion piece; 6, fixing mechanism; 61, plug-in assembly; 611, mounting plate; 612, spring telescopic rod; 613, moving plate; 614, plug-in block; 615, slot; 62, unlocking assembly; 621, mounting rod; 622, extrusion block; 623, unlocking block; 7, gantry; 8, mounting seat; 9, lifting platform; 10, hydraulic cylinder; 11, tool holder. DETAILED DESCRIPTION

[0030] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that these embodiments are discussed to enable those skilled in the art to better understand and implement the subject matter described herein. The functions and arrangements of the elements discussed may be varied without departing from the scope of protection of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

[0031] See Figure 1 and Figure 2 In this embodiment, an automatic centering and clamping system for elevator guide rail planing processing is proposed, including a machine body 1 and a processing platform 3 slidably mounted on the top of the machine body 1, a tool holder 11 is arranged above the processing platform 3, and a synchronous centering mechanism 4 is arranged between the tool holder 11 and the processing platform 3, the synchronous centering mechanism 4 includes a plurality of mounting boxes 43 fixedly mounted on the top of the processing platform 3, and a guide rail 2 is placed between two adjacent mounting boxes 43, a gantry 7 is arranged above the machine body 1, a mounting seat 8 is fixedly mounted on the gantry 7, a lifting platform 9 is slidably mounted on the mounting seat 8, the tool holder 11 is fixedly mounted on the side of the lifting platform 9 away from the mounting seat 8, a hydraulic cylinder 10 is fixedly mounted on the mounting seat 8, and the output end of the hydraulic cylinder 10 is fixedly connected to the lifting platform 9.

[0032] See Figure 2 、 Figure 3 、 Figure 4 and Figure 8A centering component 41 is provided inside the mounting box 43 for automatically centering the guide rail 2 as the tool holder 11 approaches the processing platform 3. A control component 42 is provided on the top of the mounting box 43 for controlling the centering component 41 as the tool holder 11 moves. The centering component 41 includes a plurality of return springs 411 symmetrically installed on the inner walls on both sides of the mounting box 43 along the Y-axis direction. An L-shaped sliding plate 412 is installed at one end of the return springs 411 on the same side away from the inner wall of the mounting box. The horizontal section of the L-shaped sliding plate 412 slides through the mounting box 43, and a splint 413 is fixedly installed on the side of the L-shaped sliding plate 412 away from the mounting box 43.

[0033] See Figure 2 、 Figure 3 、 Figure 4 and Figure 8 The control component 42 includes a control plate 421 slidably mounted on the bottom inner wall of the mounting box 43, and a plurality of pressure grooves 422 are provided on the side of the L-shaped sliding plate 412 close to the control plate 421, and a plurality of slopes matching the corresponding pressure grooves 422 are provided on the side of the control plate 421 close to the pressure grooves 422.

[0034] See Figure 2 、 Figure 3 、 Figure 4 and Figure 8 The top of the mounting box 43 is fixedly installed with two fixed plates 425 that are symmetrical to each other along the Y-axis direction, and an upper wedge plate 428 is slidably installed between the two fixed plates 425. The upper wedge plate 428 slides through the top inner wall of the mounting box 43, and a driving plate 427 is fixedly installed on the top of the upper wedge plate 428 through a strong spring 426. Two limit rods 429 are fixedly installed on the bottom of the driving plate 427, and the two limit rods 429 slide through the two fixed plates 425 respectively. The top of the control plate 421 is fixedly installed with a lower wedge plate 423 that cooperates with the upper wedge plate 428, and a return spring 24 is fixedly installed between the lower wedge plate 423 and the inner wall of the mounting box 43 close to the L-shaped sliding plate 412.

[0035] When in use, when the hydraulic cylinder 10 drives the lifting platform 9 to drive the tool holder 11 to descend, the lifting platform 9 will gradually approach and begin to press the lifting plate. In this process, the lifting plate pushes the upper wedge plate 428 downward through the strong spring 426, so that the bottom inclined surface of the upper wedge plate 428 contacts the inclined surface of the lower wedge plate 423, generating a horizontal component force to push the lower wedge plate 423 to slide away from the L-shaped sliding plate 412 and compress the return spring 2 424, thereby driving the control plate 421 to move accordingly. When the control plate 421 moves The slope of its side squeezes the pressure groove 422 of the L-shaped sliding plate 412, thereby generating a horizontal thrust, forcing the L-shaped sliding plate 412 to overcome the elastic force of the return spring 411 and move to the side away from the installation box 43, thereby driving the clamping plate 413 to move synchronously and approach the guide rail 2. When the inclined surfaces of the upper wedge plate 428 and the lower wedge plate 423 are staggered (that is, when the two are in plane contact), the clamping plate 413 clamps the guide rail 2 to achieve automatic centering. At the same time, the bottom of the upper wedge plate 428 contacts the control plate 421.

[0036] See Figure 1 、 Figure 2 、 Figure 3 and Figure 5 A locking mechanism 5 is provided on the top of the mounting box 43 , and the locking mechanism 5 includes a locking assembly 51 for locking the centering assembly 41 as the tool holder 11 approaches the processing platform 3 and an extrusion member 52 for extruding the locking assembly 51 .

[0037] See Figure 2 、 Figure 3 and Figure 5 The locking assembly 51 includes a fixing sleeve 511 fixedly installed on the top of the installation box 43 and a pressure plate 513 fixedly installed on the side of the fixing sleeve 511 away from the installation box 43 through a return spring 512. A locking rod 514 that slides through the fixing sleeve 511 is fixedly installed on the side of the pressure plate 513 close to the fixing sleeve 511. A locking groove 515 is provided on the upper wedge plate 428 and is arranged to penetrate and cooperate with the locking rod 514.

[0038] See Figure 2 、 Figure 3 and Figure 5 The extrusion piece 52 is L-shaped and fixedly mounted on the side of the driving plate 427 away from the mounting box 43 . The bottom of the extrusion piece 52 , close to the fixing sleeve 511 , is provided with a slope that matches the pressure plate 513 .

[0039] In specific use, when the tool holder 11 is lowered with the lifting platform 9 to the centering assembly 41 to complete the clamping of the guide rail 2, the driving plate 427 continues to move downward. At this time, since the bottom of the upper wedge plate 428 contacts the control plate 421, it will not continue to push the upper wedge plate 428 to move, but will begin to gradually compress the strong spring 426. In this process, the continued movement of the driving plate 427 will drive the extrusion member 52 to start squeezing the pressure plate 513, converting the downward pressure into a horizontal thrust on the pressure plate 513 , forcing the pressure plate 513 to overcome the elastic force of the return spring 3 512 and slide toward the fixed sleeve 511, driving the locking rod 514 to insert into the locking groove 515. When the locking rod 514 is completely embedded in the locking groove 515, the vertical position of the upper wedge plate 428 is locked to fix the position of the control plate 421 and the L-shaped sliding plate 412, ensuring that the clamping plate 413 will not loosen due to planing vibration, thereby greatly improving the stability of the centering clamping, and then improving the stability of the subsequent planing operation.

[0040] See Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 A fixing mechanism 6 is provided on the side of the extrusion member 52 away from the installation box (43), and the fixing mechanism 6 includes a plug-in component 61 for plugging and fixing the extrusion member 52 and an unlocking component 62 for unlocking the fixing mechanism 6 as the tool holder 11 moves away from the processing platform 3. The plug-in component 61 includes a mounting plate 611 fixedly mounted on the top of the machine body 1, and a spring telescopic rod 612 is fixedly mounted on the side of the mounting plate 611 close to the installation box 43. A moving plate 613 is fixedly mounted on the telescopic end of the spring telescopic rod 612. An insert block 614 is fixedly mounted on the side of the moving plate 613 close to the installation box 43. A slope is provided on the top of the insert block 614, and a slot 615 that matches the insert block 614 is provided on the extrusion member 52.

[0041] See Figure 5 、 Figure 6 and Figure 7 The unlocking assembly 62 includes two mounting rods 621 fixedly mounted on the bottom of the lifting platform 9 and symmetrical to each other along the Y-axis direction. The bottom end of the mounting rod 621 is integrally formed with an extrusion block 622, and the parallel sides of the moving track of the moving plate 613 are fixedly mounted with unlocking blocks 623 that cooperate with the corresponding extrusion blocks 622.

[0042] When the cam 614 is in the downward direction, the spring cam 612 is pressed against the top of the cam 614, and the cam 614 is pressed against the bottom of the cam 614, thereby preventing the cam 614 from moving horizontally due to the vibration of the planing.

[0043] When the integrated locking and fixing between the centering component 41, the locking component 51 and the fixing component is completed, the tool on the tool holder 11 also moves to a position opposite to the web of the guide rail 2. Then, the processing platform 3 is controlled to move along the negative direction of the Y-axis, driving the guide rail 2 to pass through the tool for planing operations.

[0044] After the planing operation is completed, the hydraulic cylinder 10 drives the lifting platform 9 to drive the tool holder 11 to rise, and the synchronous centering mechanism 4, the locking mechanism 5 and the fixing mechanism 6 are gradually reset in a completely reverse order to the clamping process: as the lifting platform 9 rises, the extrusion block 622 of the mounting rod 621 at the bottom of the lifting platform 9 contacts the unlocking blocks 623 on both sides of the moving plate 613, and the vertical upward movement is converted into a horizontal thrust through the inclined surface, forcing the moving plate 613 to overcome the elastic force of the spring telescopic rod 612 and move away from the mounting box (43), driving the insert block 614 to completely exit the extrusion piece 52 The slot 615 of the upper wedge plate 428 is released to mechanically lock the extrusion member 52, creating conditions for the subsequent unlocking process. After the locking of the extrusion member 52 is released, the strong spring 426 starts to push the driving plate 427 to move up and reset, so that the extrusion member 52 gradually moves up and away from the pressure plate 513. The pressure plate 513 slides to the side away from the installation box (43) under the action of the reset spring 512, driving the locking rod 514 to exit the locking groove 515 of the upper wedge plate 428, releasing the vertical position lock of the upper wedge plate 428. At this time, the upper wedge plate 428 resumes its movable state.

[0045] After the upper wedge plate 428 returns to its movable state, the driving plate 427 pulls the upper wedge plate 428 upward through the strong spring 426, so that the upper wedge plate 428 is separated from the lower wedge plate 423, and the lower wedge plate 423 slides toward the side close to the L-shaped sliding plate 412 under the elastic force of the return spring 2 424, driving the control plate 421 to move synchronously, and the engagement relationship between the side slope of the control plate 421 and the pressure groove 422 of the L-shaped sliding plate 412 is released. The L-shaped sliding plate 412 moves toward the center of the installation box 43 under the action of the return spring 1 411, driving the clamping plate 413 away from the guide rail 2, and finally achieving the complete release of the centering component 41.

[0046] Then the reset spring 2 424 starts to reset, pushing the lower wedge plate 423 to move to the side away from the locking rod 514 and reset. At the same time, the reset spring 1 411 drives the L-shaped sliding plate 412 to reset, and then drives the clamping plate 413 to release the centering clamping of the guide rail 2. The entire reset process realizes a fully automatic reverse action chain from unlocking the fixing mechanism 6 to loosening the centering component 41 through the release of the spring energy storage and the reverse action of the inclined plane transmission, ensuring rapid recovery to the initial state without human intervention, providing reliable protection for continuous processing.

[0047] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. However, obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An automatic centering and clamping system for elevator guide rail planing, comprising: A machine body (1) and a processing platform (3) slidably mounted on the top of the machine body (1), a tool holder (11) is provided above the processing platform (3), and the machine body (1) is characterized in that a synchronous centering mechanism (4) is provided between the tool holder (11) and the processing platform (3), and the synchronous centering mechanism (4) includes a plurality of mounting boxes (43) fixedly mounted on the top of the processing platform (3), and a guide rail (2) is placed between two adjacent mounting boxes (43); A centering assembly (41) for automatically centering the guide rail (2) as the tool holder (11) approaches the processing platform (3) is provided inside the installation box (43); a control assembly (42) for controlling the centering assembly (41) as the tool holder (11) moves is provided on the top of the installation box (43); a locking mechanism (5) is provided on the top of the installation box (43); the locking mechanism (5) includes a locking assembly (51) for locking the centering assembly (41) as the tool holder (11) approaches the processing platform (3) and an extrusion member (52) for extruding the locking assembly (51); a fixing mechanism (6) is provided on the side of the extrusion member (52) away from the installation box (43); the fixing mechanism (6) includes a plug-in assembly (61) for plugging and fixing the extrusion member (52) and an unlocking assembly (62) for unlocking the fixing mechanism (6) as the tool holder (11) moves away from the processing platform (3); The centering assembly (41) includes a plurality of return springs (411) symmetrically mounted on the inner walls of both sides of the installation box (43) along the Y-axis direction, and an L-shaped sliding plate (412) is mounted on one end of the plurality of return springs (411) on the same side away from the inner wall of the installation box. The horizontal section of the L-shaped sliding plate (412) slides through the installation box (43), and a clamping plate (413) is fixedly mounted on the side of the L-shaped sliding plate (412) away from the installation box (43). Two fixed plates (425) symmetrical to each other along the Y-axis direction are fixedly installed on the top of the installation box (43), and an upper wedge plate (428) is slidably installed between the two fixed plates (425). The locking assembly (51) includes a fixed sleeve (511) fixedly installed on the top of the installation box (43) and a pressure plate (513) fixedly installed on the side of the fixed sleeve (511) away from the installation box (43) through a return spring (512). A locking rod (514) slidingly penetrating the fixed sleeve (511) is fixedly installed on the side of the pressure plate (513) close to the fixed sleeve (511). The upper wedge plate (428) is provided with a locking groove (515) penetrating therethrough and cooperating with the locking rod (514). The plug-in assembly (61) comprises a mounting plate (611) fixedly mounted on the top of the machine body (1); a spring telescopic rod (612) is fixedly mounted on the side of the mounting plate (611) close to the mounting box (43); a movable plate (613) is fixedly mounted on the telescopic end of the spring telescopic rod (612); an insert block (614) is fixedly mounted on the side of the movable plate (613) close to the mounting box (43); and a slot (615) is provided on the extrusion piece (52) and matches the insert block (614).

2. The automatic centering and clamping system for elevator guide rail planing according to claim 1, characterized in that: A gantry (7) is mounted above the machine body (1), a mounting seat (8) is fixedly mounted on the gantry (7), a lifting platform (9) is slidably mounted on the mounting seat (8), and a tool holder (11) is fixedly mounted on a side of the lifting platform (9) away from the mounting seat (8).

3. The automatic centering and clamping system for elevator guide rail planing according to claim 1, characterized in that: The control assembly (42) includes a control plate (421) slidably mounted on the inner wall of the bottom of the mounting box (43); a plurality of pressure grooves (422) are provided on one side of the L-shaped sliding plate (412) close to the control plate (421); and a plurality of slopes matching the corresponding pressure grooves (422) are provided on one side of the control plate (421) close to the pressure grooves (422).

4. The automatic centering and clamping system for elevator guide rail planing according to claim 3, characterized in that: The upper wedge plate (428) slides through the top inner wall of the installation box (43), and a driving plate (427) is fixedly installed on the top of the upper wedge plate (428) through a strong spring (426). Two limiting rods (429) are fixedly installed on the bottom of the driving plate (427). The two limiting rods (429) slide through the two fixed plates (425) respectively. A lower wedge plate (423) that matches the upper wedge plate (428) is fixedly installed on the top of the control plate (421). A second reset spring (424) is fixedly installed between the lower wedge plate (423) and the inner wall of the installation box (43) on the side close to the L-shaped sliding plate (412).

5. The automatic centering and clamping system for elevator guide rail planing according to claim 4, characterized in that: The extrusion piece (52) is L-shaped and fixedly mounted on the side of the driving plate (427) away from the mounting box (43). The bottom of the extrusion piece (52) is provided with a sloped surface matching the pressure plate (513) on the side close to the fixing sleeve (511).

6. The automatic centering and clamping system for elevator guide rail planing according to claim 2, characterized in that: The unlocking assembly (62) includes two mounting rods (621) fixedly mounted on the bottom of the lifting platform (9) and symmetrical to each other along the Y-axis direction. The bottom ends of the mounting rods (621) are integrally formed with extrusion blocks (622). The parallel sides of the moving track of the moving plate (613) are fixedly mounted with unlocking blocks (623) that match the corresponding extrusion blocks (622).

7. The automatic centering and clamping system for elevator guide rail planing according to claim 6, characterized in that: A hydraulic cylinder (10) is fixedly mounted on the mounting seat (8), and an output end of the hydraulic cylinder (10) is fixedly connected to the lifting platform (9).

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