Racking platform fingerboard lock with overload protection function

Abstract

The invention relates to the technical field of oil and gas drilling and production, in particular to a racking platform fingerboard lock with an overload protection function, which comprises a mounting seat, a rotating motor, a transmission shaft and a deflector rod, and the transmission shaft is rotatably arranged on the mounting seat; the rotating motor is mounted on the mounting seat and used for driving the transmission shaft to rotate; the deflector rod is connected with the transmission shaft, and a groove is formed in the mounting base and used for limiting the deflector rod to rotate within the range of 0-90 degrees; a mounting hole in clearance fit with the transmission shaft is formed in the driving lever, a channel communicated with the mounting hole is formed in the driving lever, the channel penetrates through the end face of the second end of the driving lever in the axial direction of the driving lever, a fixing part, a spring and a locking part are sequentially arranged in the channel, the fixing part applies pressure to the spring, and the pressure is transmitted to the rotating shaft through the fixing part; and locking between the transmission shaft and the driving lever is realized. When the racking platform fingerboard lock is in a closed state, even if an operator operates mistakenly, the rotating motor cannot be burnt out due to overlarge torque, and the overload protection function is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and natural gas drilling and production, and in particular to a two-layer platform finger beam lock with an overload protection function. Background Art

[0002] The second-level platform finger beam lock is an important component of the second-level platform automatic pipe arrangement device of oil drilling and workover equipment. It is a locking device used to limit the sliding of the pipe string in the finger beam area to prevent accidents caused by the pipe string sliding out.

[0003] Currently, if Figure 1 and Figure 2 As shown, the existing second-floor platform finger beam lock includes a mounting base 1, a rotating motor 2, a transmission shaft 3 and a shift rod 4. The transmission shaft 3 is rotatably arranged inside the mounting base 1, and the shift rod 4 is fixed on the transmission shaft 3. A groove 16 is provided on the mounting base 1, and the groove 16 is used to limit the rotation of the shift rod 4 within the range of 0 to 90 degrees; the rotating motor 2 is installed on the mounting base 1, and is used to drive the transmission shaft 3 to rotate, so as to drive the shift rod 4 to rotate to a vertical state, thereby achieving the effect of limiting the pipe column from sliding out in the finger beam interval.

[0004] When the lever 4 is rotated to a horizontal position (the second-floor platform beam lock is closed), the operator can normally shut down the rotary motor 2 to prevent the rotary motor 2 from burning out due to excessive torque. However, if the operator makes an error and fails to shut down the rotary motor 2 in time, the lever 4 is fixedly connected to the transmission shaft 3 and cannot be rotated upward due to the restraining action of the groove 16. At this time, the torque of the rotary motor 2 increases, which can easily lead to overload and burnout of the rotary motor 2. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a two-story platform finger beam lock with an overload protection function. When the two-story platform finger beam lock is in the closed state, even if the operator fails to shut down the rotating motor in time due to error, the rotating motor will not burn out due to excessive torque, thereby realizing the overload protection function.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A two-story platform finger beam lock with an overload protection function comprises a mounting seat, a rotary motor, a transmission shaft and a lever, wherein the transmission shaft is rotatably arranged inside the mounting seat; the rotary motor is mounted on the mounting seat, and the rotary motor is drivingly connected to the transmission shaft for driving the transmission shaft to rotate; a groove is provided on the mounting seat, and the first end of the lever is located in the groove and connected to the transmission shaft, and the groove is used to limit the rotation of the lever within the range of 0 to 90 degrees; a mounting hole is provided at the first end of the lever along the axial direction of the transmission shaft, and the mounting hole is connected to the transmission shaft The driving shaft is clearance-fitted, and a channel is provided inside the shift rod that passes through the mounting hole. The channel passes through the end face of the second end of the shift rod along the axial direction of the shift rod. A fixing part, a spring and a locking part are sequentially arranged in the channel, and the fixing part is against the transmission shaft. The fixing part can slide along the axial direction of the channel, and the locking part is locked in the channel. The locking part applies pressure to the spring, and the pressure is transmitted to the transmission shaft through the fixing part, thereby realizing locking between the transmission shaft and the shift rod, so that the transmission shaft can drive the shift rod to rotate.

[0008] The beneficial effects of the present invention are as follows: when the second-floor platform finger beam lock of the present invention is in use, since the mounting hole on the shift rod and the transmission shaft are clearance-matched, and the end of the shift rod connected to the transmission shaft is located in the groove on the mounting seat, and the groove is used to limit the rotation angle of the shift rod within the range of 0 to 90 degrees, and the locking member is locked in the channel of the shift rod, the pressure exerted by the locking member on the spring is transmitted to the transmission shaft through the fixing member, so that the fixing member plays the role of pressing the transmission shaft and the shift rod, thereby realizing the locking between the transmission shaft and the shift rod. Therefore, when the rotary motor drives the transmission shaft to rotate, the transmission shaft can drive the shift rod to rotate to a vertical state, thereby achieving the effect of limiting the pipe column from sliding out in the finger beam interval. When the lever is rotated to a horizontal state (the second-floor platform finger beam lock is in a closed state), the lever stops moving under the limiting action of the groove of the mounting seat; at this time, if the operator makes an error and fails to turn off the rotating motor in time, that is, the rotating motor is still working, the torque of the rotating motor will increase due to the stop of the lever. When the torque generated by the rotating motor is greater than the pressure of the fixing part on the transmission shaft, the transmission shaft will rotate with the output shaft of the rotating motor. At this time, the load of the rotating motor will be maintained in a relatively safe range, thereby preventing the rotating motor from burning out due to excessive torque and realizing the overload protection function.

[0009] Furthermore, the outer wall of the locking member is threadedly connected and locked with the inner wall of the channel.

[0010] Beneficial effect: The locking piece is convenient for rotating and locking in the channel.

[0011] Furthermore, the locking member applies pressure to the spring by tightening.

[0012] Beneficial effect: The locking member converts the rotational motion into linear compression of the spring, thereby realizing stepless rotation adjustment of the locking member and satisfying the pressing force required by the fixing member on the transmission shaft under different working conditions.

[0013] Furthermore, a slot or a cross slot is provided on the end surface of the locking member facing away from the spring.

[0014] Beneficial effect: the slotted screwdriver or the cross slot can be matched with a slotted screwdriver. The operator holds the slotted screwdriver and drives the locking part to rotate by the slotted screwdriver, thereby applying the required pressure to the spring.

[0015] Furthermore, the cross section of the channel is circular; and the fixing piece is a cylindrical steel column.

[0016] Beneficial effect: The contact between the outer wall of the fixing piece and the inner wall of the channel is an arc surface contact, which effectively reduces the friction between the fixing piece and the channel.

[0017] Furthermore, bearing holes are provided at both ends of the mounting seat, and the two bearing holes are respectively located on both sides of the groove. Bearings are installed in the bearing holes, and the two ends of the transmission shaft are respectively connected to the two bearings. A motor mounting tube is provided at one end of the mounting seat, and the rotating motor is provided in the motor mounting tube, and the output shaft of the rotating motor is connected to the transmission shaft.

[0018] Beneficial effects: It can ensure that the transmission shaft rotates smoothly in the mounting seat, and the assembly between the transmission shaft and the mounting seat is simple, which facilitates the later maintenance of the transmission shaft.

[0019] Furthermore, an oil cup hole is provided on the mounting seat, the oil cup hole is connected to the bearing, a straight-through hydraulic oil cup is installed in the oil cup hole, and lubricating oil lubricates the bearing and the transmission shaft through the straight-through hydraulic oil cup.

[0020] Beneficial effects: The straight-through hydraulic oil cup injects lubricating oil directly into the bearing through the oil cup hole, forming a continuous oil film layer, reducing the wear of the bearing and drive shaft, and extending the service life of the bearing.

[0021] Furthermore, a left cover and a right cover are respectively provided at both ends of the mounting seat, and the left cover and the right cover are respectively used to cover the two bearing holes.

[0022] Beneficial effect: Effectively prevent dust, sand, metal debris and other solid particles from entering the bearing hole, preventing these impurities from mixing into the lubricating oil and accelerating bearing wear.

[0023] Furthermore, a left sealing gasket is provided between the left cover and the mounting seat to prevent lubricating oil from leaking from the gap between the left cover and the mounting seat; a right sealing gasket is provided between the right cover and the mounting seat to prevent lubricating oil from leaking from the gap between the right cover and the mounting seat.

[0024] Beneficial effect: effectively preventing lubricating oil from leaking from the gap between the left cover and / or the right cover and the mounting seat.

[0025] Furthermore, a guide block is provided on the left cover for identifying the assembly direction of the second-layer platform finger beam lock.

[0026] Beneficial effect: effectively identify the correct assembly position of two finger beam locks.

[0027] In summary, the present invention has the following significant effects:

[0028] 1. The present invention provides a clearance fit between the mounting hole on the lever and the transmission shaft, and utilizes a locking member to apply external force to the spring, which is transmitted to the transmission shaft via a fixing member. This locks the transmission shaft and lever, ensuring that the transmission shaft can drive the lever to rotate, thereby ensuring that the pipe column can be prevented from sliding out of the finger beam area. Due to the clearance fit between the lever's mounting hole and the transmission shaft, the installation difficulty and precision requirements between the lever and the transmission shaft are reduced. Furthermore, during assembly of the lever and the transmission shaft, if certain installation deviations occur or the lever's position needs to be fine-tuned, the clearance fit between the lever and the transmission shaft provides sufficient adjustment space, thereby improving the maintainability and adaptability of the second-floor platform finger beam lock.

[0029] 2. During use, the double-deck finger beam lock of the present invention can effectively prevent the rotating motor from burning out due to excessive output torque, thereby achieving overload protection; when the overload condition is eliminated, the spring will automatically reset itself by relying on its own elastic restoring force, and the pressure applied to the spring by the locking member will be transmitted to the transmission shaft through the fixing member, thereby restoring the locking between the transmission shaft and the shift rod. There is no need to perform complicated reset operations after each overload, thereby reducing the maintenance cost and use cost of the double-deck finger beam lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The background technology of the present invention relates to a schematic diagram of the three-dimensional structure of a second-floor platform finger beam lock;

[0031] Figure 2 The background technology of the present invention relates to a cross-sectional view of a second-floor platform finger beam lock;

[0032] Figure 3 This is a schematic diagram of the structure of a second-floor platform finger beam lock according to an embodiment of the present invention;

[0033] Figure 4 for Figure 3Cross-sectional view at AA in the middle;

[0034] Figure 5 This is a schematic diagram of the three-dimensional structure of a second-floor platform finger beam lock according to an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the three-dimensional structure of a mounting base according to an embodiment of the present invention;

[0036] Figure 7 This is a left side view of a mounting base according to an embodiment of the present invention;

[0037] Figure 8 This is a right side view of a mounting base according to an embodiment of the present invention;

[0038] Figure 9 A bottom view of a mounting base according to an embodiment of the present invention;

[0039] Figure 10 The figure is a schematic diagram of the three-dimensional structure of the shift lever according to an embodiment of the present invention.

[0040] Figure Number:

[0041] 1. Mounting seat; 10. Bearing hole; 11. Bearing; 12. Left cover; 120. Guide block; 13. Right cover; 14. Left gasket; 15. Right gasket; 16. Groove; 17. Oil cup hole; 170. Straight-through hydraulic oil cup; 2. Rotating motor; 3. Drive shaft; 4. Shift lever; 40. Mounting hole; 41. Channel; 410. Fixing piece; 411. Spring; 412. Locking piece; 413. Slotted groove; 5. Motor mounting tube; 6. Cable gland. DETAILED DESCRIPTION

[0042] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] In the description of the present invention, it should be understood that the terms "width", "up", "down", "front", "back", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0044] In the present invention, unless otherwise clearly stipulated and limited, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.

[0045] Please refer to Figure 3 - Figure 10 The present invention provides a two-layer platform finger beam lock with an overload protection function, which includes a mounting base 1, a rotating motor 2, a transmission shaft 3 and a shift rod 4.

[0046] Reference Figure 4 - Figure 9 A groove 16 is provided on the mounting seat 1, and the groove 16 passes through the bottom and front of the mounting seat 1; bearing holes 10 are provided at both ends of the mounting seat 1, and the two bearing holes 10 are respectively located on the left and right sides of the groove 16, and the bearing holes 10 are connected with the groove 16. A bearing 11 is installed in the bearing hole 10, and the bearing 11 is a deep groove ball bearing 11; the transmission shaft 3 is rotatably arranged inside the mounting seat 1. Specifically, the two ends of the transmission shaft 3 are respectively connected and fixed with the inner rings of the two bearings 11, and the transmission shaft 3 passes through the groove 16 along the axial direction of the bearing hole 10, and the outer rings of the two bearings 11 are respectively fixed in the two bearing holes 10.

[0047] Of course, a left cover 12 and a right cover 13 are respectively provided at both ends of the mounting base 1. The left cover 12 and the right cover 13 are respectively used to cover the two bearing holes 10, effectively blocking solid particles such as dust, sand, and metal debris from entering the bearing holes 10, and preventing these impurities from mixing into the lubricating oil and accelerating the wear of the bearing 11.

[0048] Reference Figure 4 and Figure 5 A left sealing gasket 14 is provided between the left cover 12 and the mounting base 1. The left sealing gasket 14 is used to prevent lubricating oil from leaking through the gap between the left cover 12 and the mounting base 1. In other words, it can be understood that the left sealing gasket 14, under the compressive force of the left cover 12, expands radially, clings to the left end face of the mounting base 1, and covers the bearing hole 10 on the left side of the mounting base 1, thereby effectively preventing lubricating oil from leaking through the gap between the left cover 12 and the mounting base 1. In addition, a guide block 120 is provided on the left cover 12. The guide block is fixedly connected to the left cover 12 and is used to identify the assembly direction of the second-floor platform finger beam lock.

[0049] Reference Figure 4 and Figure 5A right sealing gasket 15 is provided between the right cover 13 and the mounting base 1. The right sealing gasket 15 is used to prevent lubricating oil from leaking from the gap between the right cover 13 and the mounting base 1. In other words, it can be understood that the right sealing gasket 15 is subjected to the pressing force of the right cover 13, causing radial expansion, and is tightly attached to the right end face of the mounting base 1, covering the bearing hole 10 on the right side of the mounting base 1, thereby effectively preventing lubricating oil from leaking from the gap between the left cover 12 and the mounting base 1. In addition, a motor mounting barrel 5 is fixed to one end of the mounting base 1. The motor mounting barrel 5 is fixed to the right cover 13 by bolts. The right end of the motor mounting barrel 5 is detachably connected to a cable gland 6 (referring to a cable waterproof connector or a cable fixing head). The cable gland 6 can be fixed to the right end face of the motor mounting barrel 5 by bolts.

[0050] Reference Figure 4 The rotating motor 2 is fixed in a motor mounting tube 5 connected to the mounting seat 1 , and the output shaft of the rotating motor 2 is drivingly connected to the transmission shaft 3 , and the rotating motor 2 is used to drive the transmission shaft 3 to rotate.

[0051] In addition, refer to Figure 4 , an oil cup hole 17 is also provided on the mounting base 1, and the oil cup hole 17 is connected to the bearing 11. A straight-through hydraulic oil cup 170 is installed in the oil cup hole 17, and the lubricating oil lubricates the bearing 11 and the drive shaft 3 through the straight-through hydraulic oil cup 170. It can be understood that the straight-through hydraulic oil cup 170 directly injects lubricating oil into the bearing 11 through the oil cup hole 17, forming a continuous oil film layer, reducing the friction coefficient, reducing the wear of the bearing 11 and the drive shaft 3, and extending the service life of the bearing 11. Because the heat generated by the bearing 11 and the drive shaft 3 increases sharply under heavy load or high-speed operation scenarios, the lubricating oil needs to flow quickly to take away the heat and replenish the oil film; the straight-through hydraulic oil cup 170 ensures that the lubricating oil can still maintain fluidity at high temperatures by continuously supplying lubricating oil, preventing dry friction caused by oil film rupture, and improving the reliability of the second-floor platform finger beam lock under extreme working conditions.

[0052] Reference Figure 4 The first end of the shift rod 4 is located in the groove 16 of the mounting seat 1 and is connected to the transmission shaft 3. Under the limiting action of the groove 16, the shift rod 4 can only rotate within the range of 0 to 90 degrees; the first end of the shift rod 4 is provided with a mounting hole 40 along the axial direction of the transmission shaft 3, and the mounting hole 40 is clearance-matched with the transmission shaft 3. A channel 41 is provided inside the shift rod 4 and passes through the mounting hole 40. The channel 41 passes through the end surface of the second end of the shift rod 4 along the axial direction of the shift rod 4, and a fixing member 410, a spring 411 and a locking member 412 are sequentially arranged in the channel 41.

[0053] Among them, the fixing member 410 is against the transmission shaft 3, and the fixing member 410 can slide along the axial direction of the channel 41. The locking member 412 is locked in the channel 41, and the locking member 412 applies pressure to the spring 411. The pressure is transmitted to the transmission shaft 3 through the fixing member 410, thereby achieving the locking between the transmission shaft 3 and the shift lever 4, so that the transmission shaft 3 can drive the shift lever 4 to rotate. It can be seen that when the rotary motor 2 drives the transmission shaft 3 to rotate, the transmission shaft 3 can drive the shift lever 4 to rotate to a vertical state, thereby achieving the effect of limiting the pipe column from sliding out in the finger beam area. When the shift lever 4 rotates to a horizontal state (referring to the second-floor platform finger beam lock being in a closed state), the shift lever 4 stops moving under the limiting action of the groove 16 of the mounting seat 1, and the rotary motor 2 is turned off at this time.

[0054] However, when the lever 4 is rotated to a horizontal state (referring to the second-floor platform finger beam lock being in the closed state), the operator makes an error in operation, resulting in the inability to turn off the rotating motor 2 in time, the rotating motor 2 will not burn out due to excessive torque. The specific reasons are as follows: when the lever 4 is rotated to a horizontal state (referring to the second-floor platform finger beam lock being in the closed state), the lever 4 stops moving under the limiting action of the groove 16 of the mounting seat 1; at this time, if the operator makes an error in operation, resulting in the inability to turn off the rotating motor 2 in time, that is, the rotating motor 2 is still working, since the lever 4 stops moving, the torque of the rotating motor 2 will increase. When the torque generated by the rotating motor 2 is greater than the pressure of the fixing part 410 on the transmission shaft 3, the transmission shaft 3 will rotate together with the output shaft of the rotating motor 2. At this time, the load of the rotating motor 2 will be maintained within a relatively safe range, thereby preventing the rotating motor 2 from burning out due to excessive torque, thereby realizing the overload protection function.

[0055] In this embodiment, the outer wall of the locking member 412 is threadedly connected and locked to the inner wall of the channel 41, so that the locking member 412 can be easily locked in the channel 41 of the shifting lever 4. Of course, the locking member 412 applies pressure to the spring 411 by being tightened, so that the locking member 412 converts the rotational motion into linear compression of the spring 411, realizing stepless adjustment of the locking member 412 to meet the required pressing force of the fixing member 410 on the transmission shaft 3 under different working conditions.

[0056] In addition, refer to Figure 3 and Figure 4 A slot 413 is provided on the end surface of the locking piece 412 facing away from the spring 411. The slot 413 can be matched with a slotted screwdriver. The operator holds the slotted screwdriver in his hand and drives the locking piece 412 to rotate by the slotted screwdriver to apply the required pressure to the spring 411.

[0057] Of course, in other embodiments, a cross slot is provided on the end surface of the locking member 412 facing away from the spring 411 , and the cross slot can also be matched with a flat-blade screwdriver to complete the rotation of the locking member 412 .

[0058] In this embodiment, the channel 41 has a circular cross-section, and the fixing member 410 is a cylindrical steel column. Therefore, it can be understood that the contact between the outer wall of the fixing member 410 and the inner wall of the channel 41 is an arcuate contact, which reduces friction between the fixing member 410 and the channel 41, allowing the pressure applied by the locking member 412 to the spring 411 to be transmitted to the transmission shaft 3 through the steel column.

[0059] In addition, the second-layer platform finger beam lock of this embodiment realizes modular assembly, such as the motor mounting tube 5, the gland 6 and the rotating motor 2 form a first module, the mounting seat 1, the bearing 11, the transmission shaft 3, the left sealing gasket 14, the right sealing gasket 15, the left sealing cover, the right sealing cover, the guide block, the shift rod 4 and the straight-through hydraulic oil cup 170 form a second module, and the output shaft of the rotating motor 2 of the first module is connected to one end of the transmission shaft 3 of the first module to realize modular assembly, so that the second-layer platform finger beam lock of this embodiment is simple to assemble, and convenient to install, disassemble and maintain.

[0060] In summary, the external force applied by the locking member 412 to the spring 411 of the present invention is transmitted to the transmission shaft 3 via the fixing member 410, thereby achieving locking between the transmission shaft 3 and the deflector rod 4. This ensures that under normal operating conditions, the transmission shaft 3 can stably and reliably drive the deflector rod 4 to rotate, thereby ensuring that the basic functions of the two-story platform finger beam lock are properly implemented. Since the mounting hole 40 at the first end of the deflector rod 4 is clearance-matched with the transmission shaft 3, the installation difficulty and precision requirements between the deflector rod 4 and the transmission shaft 3 are reduced. In addition, during the assembly process of the deflector rod 4 and the transmission shaft 3, if certain installation deviations occur or the position of the deflector rod 4 needs to be fine-tuned, the clearance fit between the deflector rod 4 and the transmission shaft 3 can also provide a certain amount of adjustment space, thereby improving the maintainability and adaptability of the two-story platform finger beam lock.

[0061] When the lever 4 is restricted by the limit end of the groove 16 and cannot continue to rotate, the torque of the rotating motor 2 will increase; when the torque output by the rotating motor 2 is greater than the pressure of the fixing member 410 on the transmission shaft 3, the spring 411 will be compressed and deformed under the action of the force, playing a buffering role, causing relative rotation between the fixing member 410 and the transmission shaft 3, thereby breaking the locking state between the transmission shaft 3 and the lever 4, and achieving overload protection.

[0062] When the overload condition is eliminated, the spring 411 will automatically reset itself by relying on its own elastic restoring force, and the pressure applied to the spring 411 by the locking member 412 will be transmitted to the transmission shaft 3 through the fixing member 410, so that the transmission shaft 3 and the shift rod 4 are locked again, and the normal transmission function is restored, so that the second-floor platform finger beam lock can be reused without the need for complicated reset operations after each overload, thereby reducing the maintenance cost and use cost of the second-floor platform finger beam lock.

[0063] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A two-story platform finger beam lock with an overload protection function, comprising a mounting base, a rotary motor, a transmission shaft, and a lever, wherein the transmission shaft is rotatably disposed within the mounting base; the rotary motor is mounted on the mounting base and is drivingly connected to the transmission shaft for driving the transmission shaft to rotate; a groove is formed on the mounting base, a first end of the lever is located in the groove and connected to the transmission shaft, and the groove is used to limit the rotation of the lever within a range of 0 to 90 degrees; characterized in that The first end of the detent rod is provided with a mounting hole along the axial direction of the transmission shaft, and the mounting hole is clearance-matched with the transmission shaft. A channel is provided inside the detent rod and passes through the mounting hole. The channel passes through the end face of the second end of the detent rod along the axial direction of the detent rod. A fixing member, a spring and a locking member are sequentially provided in the channel. The fixing member is against the transmission shaft, the fixing member can slide along the axial direction of the channel, and the locking member is locked in the channel. The locking member applies pressure to the spring, and the pressure is transmitted to the transmission shaft through the fixing member, thereby achieving locking between the transmission shaft and the detent rod, so that the transmission shaft can drive the detent rod to rotate.

2. The double-layer platform finger beam lock with overload protection function according to claim 1 is characterized in that: The outer wall of the locking member is threadedly connected and locked with the inner wall of the channel.

3. The double-layer platform finger beam lock with overload protection function according to claim 1 is characterized in that: The locking member applies pressure to the spring by tightening.

4. The double-layer platform finger beam lock with overload protection function according to claim 2 is characterized in that: A slot or a cross slot is provided on the end surface of the locking member facing away from the spring.

5. The double-layer platform finger beam lock with overload protection function according to claim 1 is characterized in that: The cross section of the channel is circular; the fixing piece is a cylindrical steel column.

6. The double-layer platform finger beam lock with overload protection function according to claim 1 is characterized in that: Bearing holes are provided at both ends of the mounting seat, and the two bearing holes are respectively located on both sides of the groove. Bearings are installed in the bearing holes, and the two ends of the transmission shaft are respectively connected to the two bearings. A motor mounting tube is provided at one end of the mounting seat, and the rotating motor is provided in the motor mounting tube. The output shaft of the rotating motor is connected to the transmission shaft.

7. The double-layer platform finger beam lock with overload protection function according to claim 6 is characterized in that: An oil cup hole is also provided on the mounting seat, and the oil cup hole is connected to the bearing. A straight-through hydraulic oil cup is installed in the oil cup hole, and lubricating oil lubricates the bearing and the transmission shaft through the straight-through hydraulic oil cup.

8. The double-layer platform finger beam lock with overload protection function according to claim 6 is characterized in that: A left cover and a right cover are respectively provided at both ends of the mounting seat, and the left cover and the right cover are respectively used to cover the two bearing holes.

9. The double-layer platform finger beam lock with overload protection function according to claim 8 is characterized in that: A left sealing gasket is provided between the left cover and the mounting seat to prevent lubricating oil from leaking from the gap between the left cover and the mounting seat; a right sealing gasket is provided between the right cover and the mounting seat to prevent lubricating oil from leaking from the gap between the right cover and the mounting seat.

10. The double-layer platform finger beam lock with overload protection function according to claim 8, characterized in that: The left cover is provided with a guide block for identifying the assembly direction of the second-floor platform finger beam lock.

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