Positioning clamp for chamfering of elevator guide rail

Abstract

The utility model provides a positioning fixture for chamfering an elevator guide rail, which relates to the technical field of fixtures and comprises a carriage, a bidirectional threaded rod and a clamping device. The sliding frame is welded with the mounting frame; the two-way threaded rod is rotationally connected with the elevator guide rail containing table. The clamping device comprises a movable frame, a spring and an upper clamping plate; an upper clamping plate is connected to the position, close to the top end, of the front side face of the movable frame through bolts, a positioning threaded pressing rod is meshed with the front side face of the upper clamping plate, and a pressing block is connected to the front side face of the movable frame through bolts. A movable frame is welded to the top end of the spring, and a supporting frame is welded to the bottom end of the spring. Through the arrangement of a bidirectional threaded rod, a sliding frame, a pressing block and an elevator guide rail containing table, synchronous clamping and fixing of the T-shaped elevator guide rail through multiple sets of clamping and fixing devices are achieved, and the dismounting and mounting speed of the T-shaped elevator guide rail on the clamp is increased; the problem that the elevator guide rail chamfering machining efficiency is low due to the fact that a traditional elevator guide rail clamp is tedious and complex in clamping, releasing and disassembling operation is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fixtures, and more specifically, particularly relates to a positioning fixture for chamfering processing of elevator guide rails. Background Art

[0002] An elevator guide rail is a T-shaped support structure installed on the wall of an elevator shaft. It is usually firmly connected by a guide rail frame and brackets, thereby providing a fixed guiding movement path for the guide shoes of the elevator car and ensuring the vertical or inclined movement of the elevator car. Currently, in order to improve the performance and safety of elevator guide rails, reduce the friction and wear between the guide rails and elevator components, and extend the service life of the guide rails, it is necessary to use a chamfering machine to perform edge chamfering on the top of the T-shaped elevator guide rail. When the chamfering machine performs chamfering processing, a fixture with a specific structure is required to position and fix the elevator guide rail to ensure the machining accuracy of the chamfering process. Due to the long structure of the elevator guide rail, traditional elevator guide rails require multiple sets of clamping pliers to be operated at specific parts of the elevator guide rail for fixation. Each set of clamping pliers needs to be operated separately. Thus, it can be seen that the traditional elevator guide rail fixture is cumbersome and complex for clamping, releasing, disassembling, and installing the elevator guide rail, and cannot synchronously operate multiple sets of clamping pliers for the disassembly and assembly of the elevator guide rail on the fixture, reducing the chamfering processing efficiency of the elevator guide rail. Summary of the Utility Model

[0003] In order to solve the above technical problems, the utility model provides a positioning fixture for chamfering processing of elevator guide rails to solve the problem of low chamfering processing efficiency of elevator guide rails caused by the cumbersome and complex clamping, releasing, disassembling, and installing operations of traditional elevator guide rail fixtures.

[0004] The utility model provides a positioning fixture for chamfering an elevator guide rail, which comprises a base; four groups of connecting folding plates are connected to the upper side surface of the base through bolts, and an elevator guide rail placing table is connected between every two groups of connecting folding plates through bolts; it further comprises a sliding frame, a mounting frame, a bidirectional threaded rod, a clamping device, a clamping bolt and a threaded adjusting rod; a long groove is arranged on the upper side surface of the elevator guide rail placing table, guide support rods are welded to both the left side surface and the right side surface of the elevator guide rail placing table, a limiting disc is welded to the end of the guide support rod, a fixed clamping plate is connected to the upper side surface of the elevator guide rail placing table through bolts, and a T-shaped elevator guide rail is placed on the upper side surface of the elevator guide rail placing table; the sliding frame is welded to the mounting frame; a transverse clamping knob is installed at the left end of the bidirectional threaded rod, and the bidirectional threaded rod is rotatably connected to the elevator guide rail placing table; a longitudinal clamping knob is installed at the front end of the threaded adjusting rod, the threaded adjusting rod is rotatably connected to the elevator guide rail placing table, and a sliding clamping plate is meshed and connected to the outer side surface of the threaded adjusting rod; a clamping nut is screwed on the outer side surface of the clamping bolt; the clamping device comprises a support frame, a guide post, a moving frame, a pressing block, a spring, an upper clamping plate and a positioning threaded pressing rod; an upper clamping plate is connected to the front side surface of the moving frame near the top through bolts, a positioning threaded pressing rod is meshed and connected to the front side surface of the upper clamping plate, and a pressing block is connected to the front side surface of the moving frame near the bottom through bolts; the top end of the spring is welded to the moving frame, the bottom end of the spring is welded to the support frame, a convex plate is arranged on the rear side surface of the support frame, and a through hole is arranged on the upper side surface of the convex plate; the top end and the bottom end of the guide post are both welded to the support frame.

[0005] In at least some embodiments, the number of the sliding frames is two, the sliding frames are symmetrically distributed left and right, convex blocks are arranged on the lower side surface of each sliding frame, a threaded through hole penetrating left and right is arranged at the center of the convex block, the positive threaded end of the outer side surface of the bidirectional threaded rod is meshed and connected in the threaded through hole of the left sliding frame, the reverse threaded end of the outer side surface of the bidirectional threaded rod is meshed and connected in the threaded through hole of the right sliding frame, through holes penetrating left and right are arranged at the positions near the front end and the rear end of the right side surface of the sliding frame, and the guide support rod is inserted into the through hole of the sliding frame.

[0006] In at least some embodiments, the number of the mounting frames is two, the mounting frames are symmetrically distributed left and right, each mounting frame is an L-shaped folding plate structure, two long through grooves penetrating up and down are arranged on the upper side surface of the L-shaped folding plate structure of the mounting frame, and the through hole of the convex plate on the rear side surface of the support frame is butted in the long through groove of the mounting frame.

[0007] In at least some embodiments, a convex block is arranged on the lower side surface of the sliding clamping plate, the convex block of the sliding clamping plate is embedded in the long groove of the elevator guide rail placing table, a threaded through hole penetrating front and rear is arranged at the center position of the front side surface of the convex block of the sliding clamping plate, and the outer side surface of the threaded adjusting rod is threadedly meshed and connected in the threaded through hole of the sliding clamping plate, and the threaded adjusting rod drives the sliding clamping plate to move forward and backward in a directional manner.

[0008] In at least some embodiments, the moving frame is an inverted L-shaped folding plate structure. A through hole penetrating up and down is provided at the center of the upper side of the L-shaped folding plate of the moving frame. The guide post is inserted into the through hole of the moving frame, and the rear side of the moving frame is attached to the front side of the support frame.

[0009] In at least some embodiments, a threaded through hole is provided at a position near the bottom end of the front side of the upper clamping plate. The outer side of the positioning threaded pressure rod is threadedly engaged with the threaded through hole of the upper clamping plate.

[0010] In at least some embodiments, an inclined surface structure is provided on the upper side of the pressing block. The inclined surface structure of the pressing block is in mutual contact and fit with the left and right edge positions of the lower side of the elevator guide rail placement table.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. In the utility model, through the threaded meshing transmission structure formed by the forward threaded end and the reverse threaded end of the bidirectional threaded rod in the threaded through hole of the sliding frame convex block and the pushing and sliding structure formed by the elevator guide rail placement table at the inclined surface structure of the pressing block, the sliding frame is used to push a plurality of clamping devices clamped on the mounting frame to synchronously clamp the T-shaped elevator guide rail, abandoning the separate clamping operation mode of multiple clamping pliers on the traditional elevator guide rail positioning fixture, making the positioning and clamping operation and the disassembly and release operation of the T-shaped elevator guide rail faster and more convenient, improving the disassembly and assembly speed of the T-shaped elevator guide rail on the fixture, and enhancing the chamfering processing efficiency of the T-shaped elevator guide rail.

[0013] 2. In the utility model, by using the up-and-down docking structure of the through hole of the convex plate on the rear side of the support frame and the long through slot of the mounting frame and the structure of inserting and screwing the clamping bolt and the clamping nut, the support frame can arbitrarily change the clamping position of the clamping device on the long through slot of the mounting frame according to the length of the T-shaped elevator guide rail, realizing the flexible clamping of multiple clamping devices at different positions of T-shaped elevator guide rails with different lengths, and improving the clamping applicability of the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the utility model.

[0015] Figure 2 is a top view structural diagram of the utility model.

[0016] Figure 3 is a front view structural diagram of the utility model.

[0017] Figure 4 is a left view structural diagram of the utility model.

[0018] Figure 5 is a left view sectional structural diagram of the utility model.

[0019] Figure 6 It is a schematic structural diagram of the clamping device of the present utility model.

[0020] Figure 7 It is a schematic rear view structural diagram of the clamping device of the present utility model.

[0021] Figure 8 It is a schematic left view structural diagram of the clamping device of the present utility model.

[0022] Figure 9 It is a schematic right view sectional structural diagram of the clamping device of the present utility model.

[0023] Figure 10 It is a schematic front view sectional structural diagram of the present utility model.

[0024] Reference numerals:

[0025] 1. Base;

[0026] 2. Slide carriage;

[0027] 3. Limit disc;

[0028] 4. Guide support rod;

[0029] 5. Elevator guide rail placement table;

[0030] 6. T-shaped elevator guide rail;

[0031] 7. Connecting folding plate;

[0032] 8. Mounting bracket;

[0033] 9. Transverse clamping knob;

[0034] 10. Longitudinal clamping knob;

[0035] 11. Bidirectional threaded rod;

[0036] 12. Clamping device; 1201. Support frame; 1202. Guide post; 1203. Moving frame; 1204. Pressing block; 1205. Spring; 1206. Upper clamping plate; 1207. Positioning threaded pressure rod;

[0037] 13. Fixed clamping plate;

[0038] 14. Sliding clamping plate;

[0039] 15. Clamping bolt;

[0040] 16. Threaded adjusting rod;

[0041] 17. Clamping nut. Detailed implementation manners

[0042] The following further describes in detail the embodiments of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0043] As Figures 1-10 shown, the present utility model provides a positioning fixture for chamfering an elevator guide rail, including a base 1; four groups of connecting folding plates 7 are bolted to the upper side of the base 1, and an elevator guide rail placement table 5 is bolted between every two groups of connecting folding plates 7; it also includes a carriage 2, a mounting frame 8, a bidirectional threaded rod 11, a clamping device 12, a clamping bolt 15, and a threaded adjusting rod 16; a long groove is provided on the upper side of the elevator guide rail placement table 5, guiding support rods 4 are welded to both the left side and the right side of the elevator guide rail placement table 5, a limiting disk 3 is welded to the end of the guiding support rod 4, a fixed clamping plate 13 is bolted to the upper side of the elevator guide rail placement table 5, and a T-shaped elevator guide rail 6 is placed on the upper side of the elevator guide rail placement table 5; the carriage 2 is welded to the mounting frame 8; a transverse clamping knob 9 is installed at the left end of the bidirectional threaded rod 11, and the bidirectional threaded rod 11 is rotatably connected to the elevator guide rail placement table 5; a longitudinal clamping knob 10 is installed at the front end of the threaded adjusting rod 16, the threaded adjusting rod 16 is rotatably connected to the elevator guide rail placement table 5, and a sliding clamping plate 14 is meshed and connected to the outer side of the threaded adjusting rod 16; a clamping nut 17 is screwed onto the outer side of the clamping bolt 15; the clamping device 12 includes a support frame 1201, a guide post 1202, a moving frame 1203, a pressing block 1204, a spring 1205, an upper clamping plate 1206, and a positioning threaded pressing rod 1207; an upper clamping plate 1206 is bolted to the front side of the moving frame 1203 near the top, a positioning threaded pressing rod 1207 is meshed and connected to the front side of the upper clamping plate 1206, and a pressing block 1204 is bolted to the front side of the moving frame 1203 near the bottom; the top of the spring 1205 is welded to the moving frame 1203, the bottom of the spring 1205 is welded to the support frame 1201, a convex plate is provided on the rear side of the support frame 1201, and a through hole is provided on the upper side of the convex plate; the top and the bottom of the guide post 1202 are welded to the support frame 1201.

[0044] In the embodiments of the present disclosure, the number of the carriage 2 is two groups, and the carriages 2 are symmetrically distributed left and right. Each lower side surface of the carriage 2 is provided with a convex block, and a threaded through hole penetrating left and right is provided at the central part of the convex block. The positive-thread end on the outer side surface of the bidirectional threaded rod 11 is meshed and connected in the threaded through hole of the left carriage 2, and the reverse-thread end on the outer side surface of the bidirectional threaded rod 11 is meshed and connected in the threaded through hole of the right carriage 2. Through holes penetrating left and right are provided at positions near the front end and the rear end on the right side surface of the carriage 2, and the guiding support rod 4 is inserted into the through holes of the carriage 2. During the rotation of the bidirectional threaded rod 11, the bidirectional threaded rod 11 drives the two groups of carriages 2 to move towards each other left and right along the guiding support rod 4, so that the carriages 2 push multiple groups of clamping devices 12 carried by the mounting frame 8 to approach the T-shaped elevator guide rail 6 synchronously, and the multiple groups of clamping devices 12 perform synchronous clamping work on the T-shaped elevator guide rail 6.

[0045] In the embodiments of the present disclosure, the number of the mounting frames 8 is two groups, and the mounting frames 8 are symmetrically distributed left and right. Each mounting frame 8 has an L-shaped folded plate structure. Two long through slots penetrating up and down are provided on the upper side surface of the L-shaped folded plate structure of the mounting frame 8. The through holes of the convex plates on the rear side surface of the support frame 1201 are docked in the long through slots of the mounting frame 8, so that the support frame 1201 can arbitrarily select the clamping position of the clamping device 12 on the mounting frame 8 along the long through slots of the mounting frame 8 according to the length of the T-shaped elevator guide rail 6 through the clamping nut 17 and the clamping bolt 15.

[0046] In the embodiments of the present disclosure, the lower side surface of the sliding clamping plate 14 is provided with a convex block, and the convex block of the sliding clamping plate 14 is embedded in the long groove of the elevator guide rail placing table 5. The sliding clamping plate 14 moves directionally along the long groove of the elevator guide rail placing table 5. A threaded through hole penetrating front and rear is provided at the central position of the front side surface of the convex block of the sliding clamping plate 14. The outer side surface of the threaded adjusting rod 16 is threadedly meshed and connected in the threaded through hole of the sliding clamping plate 14. The threaded adjusting rod 16 drives the sliding clamping plate 14 to move directionally front and rear, so that the sliding clamping plate 14 cooperates with the fixed clamping plate 13 to perform limit clamping on the T-shaped elevator guide rail 6 with different lengths in the front and rear directions, and prevent the T-shaped elevator guide rail 6 from shifting forward during the chamfering process.

[0047] In the embodiments of the present disclosure, the moving frame 1203 has an inverted L-shaped folded plate structure. A through hole penetrating up and down is provided at the central position of the upper side surface of the L-shaped folded plate of the moving frame 1203. The guide post 1202 is inserted into the through hole of the moving frame 1203. The rear side surface of the moving frame 1203 is attached to the front side surface of the support frame 1201, so that the moving frame 1203 moves vertically up and down along the guide post 1202, and the upper clamping plate 1206 threadedly connected to the front side surface of the moving frame 1203 clamps and contacts the T-shaped elevator guide rail 6 vertically and stably.

[0048] In the embodiments of the present disclosure, a threaded through hole is provided at a position near the bottom end of the front side of the upper clamping plate 1206. The outer side surface of the positioning threaded compression rod 1207 is threadedly engaged in the threaded through hole of the upper clamping plate 1206. During the rotation of the positioning threaded compression rod 1207, the telescopic movement distance of the positioning threaded compression rod 1207 at the threaded through hole of the upper clamping plate 1206 is changed according to the lateral width of the T-shaped elevator guide rail 6, so that the upper clamping plate 1206 carrying the positioning threaded compression rod 1207 clamps and positions the left and right sides of the T-shaped elevator guide rail 6 with different widths, preventing the T-shaped elevator guide rail 6 from shifting left and right during chamfering processing and ensuring the chamfering processing accuracy.

[0049] In the embodiments of the present disclosure, the upper side surface of the pressing block 1204 is provided with an inclined surface structure. The inclined surface structure of the pressing block 1204 is in mutual contact and fit with the left and right edge positions of the lower side surface of the elevator guide rail placing table 5. When the two sets of sliding frames 2 respectively push the clamping devices 12 clamped on the two sets of mounting frames 8 to move closer to the T-shaped elevator guide rail 6, the left or right edge of the lower side surface of the elevator guide rail placing table 5 presses the inclined surface structure of the pressing block 1204, so that the pressing block 1204 drives the upper clamping plate 1206 bolted to the position near the top of the front side of the moving frame 1203 to move vertically downward. The upper clamping plate 1206 cooperates with the upper side surface of the elevator guide rail placing table 5 to clamp the T-shaped elevator guide rail 6 up and down, preventing the T-shaped elevator guide rail 6 from lifting and flipping during chamfering processing.

[0050] The specific usage mode and function of this embodiment:

[0051] When the utility model performs the clamping and positioning work of the T-shaped elevator guide rail 6, first turn the positioning threaded pressure rod 1207 according to the transverse width at the bottom of the T-shaped elevator guide rail 6. Since the thread on the outer side of the positioning threaded pressure rod 1207 is meshed and connected in the threaded through hole of the upper clamping plate 1206, the positioning threaded pressure rod 1207 moves telescopically in the threaded through hole of the upper clamping plate 1206 to adjust the positioning threaded pressure rod 1207 to a suitable telescopic position. Then, according to the length of the T-shaped elevator guide rail 6, the convex plate through hole on the rear side of the support frame 1201 is butted against a suitable position on the upper side of the through groove of the mounting frame 8. Then, the clamping bolts 15 are sequentially inserted into the convex plate through hole of the support frame 1201 and the through groove of the mounting frame 8 from top to bottom. At this time, the bottom end of the clamping bolt 15 extends out of the lower side of the through groove of the mounting frame 8. Then, the clamping nut 17 is screwed onto the threaded surface outside the clamping bolt 15, so that the clamping nut 17 and the clamping bolt 15 clamp the clamping device 12 at the through groove structure of the mounting frame 8. Then, the T-shaped elevator guide rail 6 is placed on the upper side of the elevator guide rail placing table 5, and the rear end of the T-shaped elevator guide rail 6 abuts against the front side of the fixed clamping plate 13. After that, manually turn the transverse clamping knob 9, and the transverse clamping knob 9 drives the bidirectional threaded rod 11 to rotate. Since the positive thread end and the reverse thread end on the outer side of the bidirectional threaded rod 11 are respectively meshed and connected in the threaded through holes of the two groups of sliding frames 2, the bidirectional threaded rod 11 drives the two groups of sliding frames 2 to move towards each other left and right. The sliding frame 2 drives the clamping device 12 clamped on the mounting frame 8 to move synchronously. At this time, the inclined surface structure of the pressing block 1204 of the clamping device 12 abuts against the edge of the lower side of the elevator guide rail placing table 5. During the process of the clamping device 12 moving towards the elevator guide rail placing table 5, the lower edge of the elevator guide rail placing table 5 pushes the inclined surface structure of the pressing block 1204, and the pressing block 1204 drives the moving frame 1203 to move downward along the guide post 1202 against the elastic force of the spring 1205. The moving frame 1203 drives the upper clamping plate 1206 connected by bolts to move synchronously until the upper clamping plate 1206 abuts against the upper side of the T-shaped elevator guide rail 6. The upper clamping plate 1206 cooperates with the upper side of the elevator guide rail placing table 5 to clamp the T-shaped elevator guide rail 6 up and down. At this time, the six groups of positioning threaded pressure rods 1207 respectively push against the left side and the right side of the T-shaped elevator guide rail 6 for left and right limit clamping. Then, manually turn the longitudinal clamping knob 10, and the longitudinal clamping knob 10 drives the threaded adjusting rod 16 to rotate. Since the thread on the outer side of the threaded adjusting rod 16 is meshed and connected in the threaded through hole of the sliding clamping plate 14, the threaded adjusting rod 16 drives the sliding clamping plate 14 to move forward and backward directionally along the through groove of the elevator guide rail placing table 5 according to the length of the T-shaped elevator guide rail 6 until the rear side of the sliding clamping plate 14 abuts against the front side of the T-shaped elevator guide rail 6. The sliding clamping plate 14 cooperates with the fixed clamping plate 13 to position and clamp the T-shaped elevator guide rail 6 front and back to prevent the T-shaped elevator guide rail 6 from shifting forward and backward under force during the chamfering process. After the T-shaped elevator guide rail 6 is processed, when performing the release work of the T-shaped elevator guide rail 6, the transverse clamping knob 9 drives the bidirectional threaded rod 11 to rotate in the reverse direction,The bidirectional threaded rod 11 drives the two sets of sliding frames 2 to move away from each other in opposite directions. The sliding frames 2 drive the pressing blocks 1204 of the clamping device 12 to move synchronously. At this time, the inclined surface structure of the pressing block 1204 fits against the edge position of the lower side surface of the elevator guide rail placement table 5. The spring 1205 drives the moving frame 1203 to rise along the guide post 1202 through elastic force. The moving frame 1203 drives the upper clamping plate 1206 to disengage from the upper side surface of the T-shaped elevator guide rail 6. The upper clamping plate 1206 of the clamping device 12 releases the up-and-down and left-and-right positions of the T-shaped elevator guide rail 6. Then, manually turn the longitudinal clamping knob 10 in the reverse direction. The longitudinal clamping knob 10 drives the threaded adjustment rod 16 to rotate. The threaded adjustment rod 16 drives the sliding clamping plate 14 to disengage from the T-shaped elevator guide rail 6, completing the front-and-back release of the T-shaped elevator guide rail 6 by the sliding clamping plate 14 and the fixed clamping plate 13.,

[0052] The installation methods, connection methods, or setting methods of all the above components are common mechanical methods, such as welding, threaded connection, screw connection, etc. And the specific structures, models, and coefficient indicators of all its components are its own technologies, and any implementation that can achieve its beneficial effects can be carried out. The above-mentioned T-shaped elevator guide rail 6, clamping bolt 15, and clamping nut 17 are all common devices on the market. When purchased and used, only connect them according to the operation manual purchased together to be used, so it will not be elaborated here.,

[0053] The technical solution of the present utility model is not limited to the scope of the embodiments of the present utility model. The technical content not described in detail in the present utility model is well-known technology.,

Claims

1. A positioning fixture for chamfering an elevator guide rail, comprising a base; four groups of connecting folding plates are connected to the upper side surface of the base by bolts, and an elevator guide rail placing table is connected between every two groups of connecting folding plates by bolts; characterized in that: It also includes a carriage, a mounting bracket, a bidirectional threaded rod, a clamping device, a clamping bolt and a threaded adjusting rod; a long groove is provided on the upper side surface of the elevator guide rail placing table, guide support rods are welded and connected to both the left side surface and the right side surface of the elevator guide rail placing table, a limiting disc is welded and connected to the end of the guide support rod, a fixed clamping plate is bolted to the upper side surface of the elevator guide rail placing table, and a T-shaped elevator guide rail is placed on the upper side surface of the elevator guide rail placing table; the carriage is welded and connected to the mounting bracket; a transverse clamping knob is installed at the left end of the bidirectional threaded rod, and the bidirectional threaded rod is rotatably connected to the elevator guide rail placing table; a longitudinal clamping knob is installed at the front end of the threaded adjusting rod, the threaded adjusting rod is rotatably connected to the elevator guide rail placing table, and a sliding clamping plate is meshed and connected to the outer side surface of the threaded adjusting rod; a clamping nut is screwed on the outer side surface of the clamping bolt; the clamping device includes a support frame, a guide post, a moving frame, a pressing block, a spring, an upper clamping plate and a positioning threaded pressing rod; an upper clamping plate is bolted to the position near the top of the front side surface of the moving frame, a positioning threaded pressing rod is meshed and connected to the front side surface of the upper clamping plate, and a pressing block is bolted to the position near the bottom of the front side surface of the moving frame; the top end of the spring is welded and connected to the moving frame, the bottom end of the spring is welded and connected to the support frame, a convex plate is provided on the rear side surface of the support frame, and a through hole is provided on the upper side surface of the convex plate; the top end and the bottom end of the guide post are both welded and connected to the support frame.

2. The positioning fixture for chamfering an elevator guide rail according to claim 1, wherein: There are two sets of the carriages, which are symmetrically distributed left and right. Each set of carriages has a convex block on its lower side surface, and a threaded through hole penetrating left and right is provided at the center of the convex block. The positive threaded end on the outer side surface of the bidirectional threaded rod is meshed and connected in the threaded through hole of the left carriage, and the reverse threaded end on the outer side surface of the bidirectional threaded rod is meshed and connected in the threaded through hole of the right carriage. Through holes penetrating left and right are provided at the positions near the front end and the rear end of the right side surface of the carriage, and the guide support rod is inserted into the through hole of the carriage.

3. The positioning fixture for chamfering an elevator guide rail according to claim 1, characterized in that: There are two sets of the mounting brackets, which are symmetrically distributed left and right. Each set of mounting brackets is an L-shaped folded plate structure. Two long through slots penetrating up and down are provided on the upper side surface of the L-shaped folded plate structure of the mounting bracket, and the through hole of the convex plate on the rear side surface of the support frame is butted in the long through slot of the mounting bracket.

4. The positioning fixture for chamfering an elevator guide rail according to claim 1, wherein: A convex block is provided on the lower side surface of the sliding clamping plate. The convex block of the sliding clamping plate is embedded in the long groove of the elevator guide rail placing table. A threaded through hole penetrating front and back is provided at the center position of the front side surface of the convex block of the sliding clamping plate, and the outer side surface of the threaded adjusting rod is threadedly meshed and connected in the threaded through hole of the sliding clamping plate. The threaded adjusting rod drives the sliding clamping plate to move forward and backward in a fixed direction.

5. The positioning fixture for chamfering an elevator guide rail according to claim 1, wherein: The moving frame is an inverted L-shaped folded plate structure. A through hole penetrating up and down is provided at the center position of the upper side surface of the L-shaped folded plate of the moving frame. The guide post is inserted into the through hole of the moving frame, and the rear side surface of the moving frame is attached to the front side surface of the support frame.

6. The positioning fixture for chamfering an elevator guide rail according to claim 1, wherein: A threaded through hole is provided at the position near the bottom of the front side surface of the upper clamping plate, and the outer side surface of the positioning threaded pressing rod is threadedly meshed and connected in the threaded through hole of the upper clamping plate.

7. The positioning fixture for chamfering an elevator guide rail according to claim 1, wherein: An inclined surface structure is provided on the upper side surface of the pressing block, and the inclined surface structure of the pressing block is in mutual contact and fit with the left and right edge positions of the lower side surface of the elevator guide rail placing table.

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