A self-locking mechanism for telescopic pedal of assembly rack

Abstract

The present invention discloses a self-locking mechanism for a telescopic pedal of an assembly frame, comprising two claws, wherein the bottom of the claws is provided with a buckle groove with both the front side and the rear side being open, the bottom of the inner wall of the buckle groove on both sides is provided with an inclined surface, and a hollow pedal is fixedly connected to the adjacent side of the two claws. The present invention can quickly unlock the telescopic adjustment of the overall pedal length by a simple pulling method through a series of structures provided, and can self-lock when the claws are clamped on the circular horizontal support rod of the assembly frame, and can realize a warning effect when clamping and locking by controlling the corresponding red light to turn on and off respectively when not self-locking and after self-locking, so as to facilitate personnel to make accurate judgments and reduce the risk of separation, and can also utilize the side guide bar to mutually restrain the telescopic locking and self-locking, so as to realize stable restriction of the claws, avoid the phenomenon of automatic unlocking of the claws due to accidental contact, and improve the self-locking stability.

Description

Technical Field

[0001] The invention relates to the technical field of assembly rack pedals, in particular to a self-locking mechanism for a telescopic pedal of an assembly rack. Background Art

[0002] The assembly rack is a type of scaffolding, which is a support frame set up for workers at the construction or assembly factory site. It is used for exterior wall and interior decoration on construction sites, and for workers to assemble machinery at higher positions in assembly factories. The assembly rack pedal is a component of the assembly rack, which is fixed to the side horizontal support rod of the assembly rack by claws to facilitate workers to walk on the assembly rack. The claws of the existing assembly rack pedal are set up on the side horizontal support rod of the assembly rack, which lacks the function of protection and anti-falling;

[0003] In this regard, a Chinese patent with announcement number CN214034719U discloses a scaffolding self-locking pedal, including a pedal body, two groups of plug plates, and multiple groups of self-locking mechanisms, wherein the self-locking mechanism includes an arc clamping plate, an upper locking pin, and a lower locking pin. The staff adjusts the position of the plug plate according to the spacing of the cross bars of the scaffolding, so that the semicircular groove of the clamping claw is clamped on the cross bar of the scaffolding, the upper locking pin slides along the arc through hole, and the lower locking pin slides along the strip through hole, so that the lower part of the arc clamping plate is inserted into the open part of the semicircular groove, and the cross bar of the scaffolding is stably locked in the semicircular groove, thereby realizing efficient locking of the scaffolding pedal, preventing the scaffolding pedal from tipping over and falling, and ensuring the safety of the staff.

[0004] The above patent realizes locking of the claws through a self-locking mechanism formed by an arc clamping plate, an upper locking pin and a lower locking pin, and realizes locking after telescopic adjustment through a provided locking bolt, but it still has some shortcomings;

[0005] 1. The arc pallet is used with an arc plate, an upper locking pin and a lower locking pin to realize the self-locking of the arc pallet rotation limit. There is a lack of warning function when it is locked and locked. It is easy to fail to remind personnel when it fails to self-lock due to friction and other accidents, which makes it easy for personnel to be unaware due to negligence, resulting in risks; 2. Its telescopic locking and self-locking cannot restrain each other, and it is easy for the self-locking part to be unlocked due to factors such as accidental contact, and the stability is not ideal; Based on the above phenomena, we propose a self-locking mechanism for the telescopic pedal of the assembly frame to solve the above problems. Summary of the invention

[0006] Based on the technical problems existing in the background technology, the present invention proposes a self-locking mechanism for a telescopic pedal of an assembly rack.

[0007] The invention provides a self-locking mechanism for a telescopic pedal of an assembly rack, comprising two claws, wherein the bottom of the claws is provided with a buckle groove with both the front side and the rear side being open, and the bottom of the inner wall of both sides of the buckle groove is provided with an inclined surface, and the two sides of the two claws are fixedly connected with a hollow pedal, and the same inner pedal is provided in the sliding sleeves of the two hollow pedals; the two hollow pedals cooperate with the inner pedal, and the two hollow pedals can be moved close to or repelled on the inner pedal to adjust the length of the entire pedal, so as to achieve the effect of telescopically adjusting the length of the entire pedal;

[0008] The bottom of the inner pedal is provided with two rectangular grooves, and a hard non-slip rubber is bonded and fixed on the top inner wall of the rectangular groove. A moving rod is provided under the hollow pedal, and a rectangular through hole is provided on the top of the moving rod. A handle rod is fixedly connected between the inner walls on both sides of the rectangular through hole.

[0009] Both sides of the top of the moving rod are fixedly connected with guide bars, the tops of the guide bars slide through the bottoms of the corresponding hollow pedals and extend into the inside thereof, the tops of the two middle guide bars among the four guide bars are fixedly connected with friction locking components, and the friction locking components are tightly contacted with the bottoms of the corresponding hard non-slip rubbers; the friction locking components are used to generate friction force to lock the lateral position of the guide bars when they are tightly fitted with the hard non-slip rubbers, so as to achieve locking of the hollow pedals;

[0010] The guide baffle rod is fixedly connected with an elastic tightening support assembly fixedly connected to the inner wall of the bottom of the corresponding hollow pedal, and the elastic tightening support assembly is used to elastically tighten and support the guide baffle rod;

[0011] The bottom of the inner pedal is fixedly connected to a reminder control assembly located between the two hollow pedals, a light touch-off switch electrically connected to the reminder control assembly is fixedly installed on the top inner wall of the hollow pedal, and the top ends of the two guide bars located on both sides are in close contact with the touch ends of the corresponding light touch-off switches, respectively, and the reminder control assembly is used to give a warning reminder when the light touch-off switch and the corresponding guide bar are in a separated state;

[0012] A groove is provided on one side of the two claws that are close to each other, and an elastic self-locking limiting component is installed in the groove. The repelling sides of the two guide bars on both sides are in active contact with the sides close to the two elastic self-locking limiting components respectively, and the repelling sides of the two elastic self-locking limiting components extend into the corresponding claws respectively. The elastic self-locking limiting component is used to self-lock and limit the circular cross support rod on the side of the external assembly frame after it is clamped into the claw.

[0013] Preferably, the friction locking assembly includes a pressure block and multiple pointed blocks, the top ends of the two guide bars in the middle are respectively fixedly connected to the bottom ends of the corresponding pressure blocks, the top ends of the pressure blocks are fixedly connected to the bottom ends of the corresponding multiple pointed blocks, and the tips of the pointed blocks are in close contact with the bottom ends of the corresponding hard anti-slip rubbers; the set pressure block and multiple pointed blocks cooperate, and the friction between the pointed blocks and the corresponding hard anti-slip rubbers is used to limit the pressure block, and the pressure block is used to limit the corresponding guide bars and the hollow pedal, so as to facilitate locking of the hollow pedal when it is telescopically adjusted.

[0014] Preferably, the elastic tensioning support assembly includes a support block and a compression spring in a compressed state, the support block is fixedly connected to the outer side of the corresponding guide baffle rod, and the top and bottom ends of the compression spring are respectively fixedly connected to the bottom of the corresponding support block and the bottom inner wall of the hollow pedal; the support block and the compression spring in a compressed state cooperate with each other, and the elastic force of the compression spring in a compressed state is used to realize upward elastic tensioning support of the guide baffle rod through the corresponding support block.

[0015] Preferably, the reminder control assembly includes a U-shaped seat, a battery, a controller and two red warning lights, the top of the U-shaped seat is fixedly connected to the bottom of the inner pedal, the adjacent sides of the two red warning lights are respectively fixedly connected to the two sides of the U-shaped seat, the controller and the battery are fixedly connected to the left inner wall of the U-shaped seat, the red warning light and the controller are electrically connected to the battery, and the two touch-off switches and the two red warning lights are electrically connected to the controller; the U-shaped seat, battery, controller and two red warning lights are arranged to cooperate, and after the handle bar is pulled downward to drive the guide lever to move downward through the moving rod, when the guide lever contacts downward to the squeeze touch state of the touch-off switch, the touch-off switch transmits a no-squeezing signal to the controller to control the corresponding red warning light to turn on, and when the guide lever moves up and contacts the squeeze touch switch, the corresponding red warning light is controlled to turn off.

[0016] Preferably, the elastic self-locking limiting assembly includes two guide posts fixedly connected to the inner wall of the corresponding groove away from the opening side thereof, a guide sleeve is slidably sleeved on the guide post, a limiting cross bar is fixedly connected between the two guide sleeves located in the same groove, one end of the guide post close to the inner pedal is fixedly connected to the limiting block, a first spring is fixedly connected between the guide sleeve and the corresponding limiting block, the first spring is movably sleeved on the corresponding guide post, the repelling ends of the two limiting cross bars respectively extend into the corresponding claws and are nested with extrusion balls, the adjacent sides of the two limiting cross bars are nested with blocking balls, the repelling sides of the two guide blocking bars located on both sides are respectively movably contacted with the adjacent sides of the two blocking balls, and the claws are slidably sleeved on the corresponding limiting cross bars; the guide posts, The guide sleeve, the limiting cross bar, the limit block, the extrusion ball, the blocking ball and the first spring cooperate. When the circular cross support rod on the side of the external assembly frame is inserted into the claw, the extrusion ball will be squeezed. Under the extrusion force, the extrusion ball is displaced and drives the corresponding limiting cross bar to move in the direction close to the inner pedal. The limiting cross bar drives the corresponding guide sleeve to slide on the guide column and compress the first spring. After the circular cross support rod on the side of the assembly frame is inserted, the first spring in the compressed state drives the limiting cross bar to move back and reset through the corresponding guide sleeve, and squeezes and blocks the circular cross support rod on the side of the assembly frame. If it is not completely moved back and reset, the blocking ball will block the corresponding guide blocking rod so that it cannot squeeze and touch the touch-to-close switch upward, so that the corresponding red warning light is in the on state to remind personnel.

[0017] Preferably, a finger avoidance groove is provided at the bottom of the hollow pedal, and the finger avoidance groove is located above the corresponding handlebar.

[0018] Preferably, the two guide blocking rods located in the middle are respectively located in corresponding rectangular grooves.

[0019] Preferably, the inner pedal is located between two touch-to-close switches.

[0020] Preferably, two vertical guide holes are provided on the inner wall of the bottom of the hollow pedal and are respectively slidably fitted with the outer sides of the corresponding guide bars.

[0021] Preferably, a circular cross-bracing rod on the side of the assembly rack is movably clamped in the clamping claw, and the bottoms of the adjacent sides of the circular cross-bracing rods on the side of the two assembly racks are in rolling contact with the corresponding extrusion balls respectively.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Through the cooperation of the handle bar, the moving bar, the guide bar, the elastic tension support assembly, the hard non-slip rubber, the friction locking assembly, the inner pedal and the hollow pedal, the hollow pedal can be unlocked when the handle bar is pulled down, so as to facilitate the telescopic adjustment of the overall pedal length formed by the two hollow pedals and the inner pedal;

[0024] 2. Through the cooperation of the set guide stopper, touch-off switch, reminder control component, claw and elastic self-locking limit component, the blocking restriction on the elastic self-locking limit component can be simultaneously released when the length is unlocked and adjusted, and the squeezing state of the touch-off switch can be released to realize the turning on reminder of the red light warning light, and the claw can be directly connected to the circular cross support rod on the side of the assembly frame in the restricted state, and the elastic self-locking limit component can be used to form self-locking after the connection, and the hollow pedal after telescopic adjustment can be self-locked when the pulling force on the handlebar is relaxed, and the red light warning light can be controlled to be turned off by squeezing and touching the touch-off switch again after self-locking, and the corresponding red light warning light can be controlled to turn on and off respectively before and after self-locking, so that the warning effect can be achieved when clamping and locking, and the guide stopper can be used to block and restrict the elastic self-locking limit component after self-locking, so that the telescopic locking and self-locking can be restrained by each other, and the stable restriction of the claw can be realized, and the phenomenon of automatic unlocking of the claw due to accidental touch can be avoided.

[0025] The present invention, through the arrangement of a series of structures, can quickly unlock the telescopic adjustment of the overall pedal length by a simple pulling method, and can self-lock when the claw is clamped on the circular cross support rod of the assembly frame. By respectively controlling the turning on and off of the corresponding red light warning light before and after self-locking, a warning effect can be achieved when clamped and locked, which is convenient for personnel to make accurate judgments and reduce the risk of disengagement. In addition, the guide baffle rod on the side can be used to restrain the telescopic locking and self-locking to achieve stable restriction of the claw, avoid the phenomenon of automatic unlocking of the claw due to accidental contact, and improve the self-locking stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a self-locking mechanism for a telescopic pedal of an assembly stand proposed by the present invention;

[0027] Figure 2 A cross-sectional structural diagram of a self-locking mechanism for a telescopic pedal of an assembly stand proposed by the present invention;

[0028] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part A;

[0029] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of part B in FIG.

[0030] Figure 5 The present invention provides a schematic three-dimensional structural diagram of a moving rod, a handlebar rod and a limit stop rod connecting piece of a self-locking mechanism for a telescopic pedal of an assembly stand.

[0031] In the figure: 1. claw; 2. buckle groove; 3. inclined surface; 4. hollow pedal; 5. inner pedal; 6. rectangular groove; 7. hard non-slip rubber; 8. moving rod; 9. rectangular through hole; 10. handle bar; 11. guide bar; 12. support block; 13. compression spring; 14. pressure block; 15. pointed block; 16. touch-off switch; 17. U-shaped seat; 18. red warning light; 19. controller; 20. groove; 21. guide column; 22. guide sleeve; 23. limit block; 24. first spring; 25. limit cross bar; 26. squeeze ball; 27. shield ball; 28. finger avoidance groove; 29. ​​battery. DETAILED DESCRIPTION

[0032] The present invention will be further explained below in conjunction with specific embodiments.

[0033] Example

[0034] Reference Figure 1-5 The present embodiment proposes a self-locking mechanism for a telescopic pedal of an assembly rack, comprising two claws 1, the bottom of the claws 1 is provided with a buckle groove 2 with openings on the front and rear sides, the bottom of the inner wall of the buckle groove 2 on both sides is provided with an inclined surface 3, the two claws 1 are fixedly connected to the side close to each other with a hollow pedal 4, the two sides of the hollow pedal 4 are provided with openings, and the two hollow pedals 4 are provided with a same inner pedal 5 in a sliding sleeve; the two hollow pedals 4 cooperate with the inner pedal 5, and the two hollow pedals 4 can be moved close to or repelled on the inner pedal 5 to adjust the length of the entire pedal, so as to achieve the effect of telescopically adjusting the length of the entire pedal;

[0035] Two rectangular grooves 6 are provided at the bottom of the inner pedal 5, and a hard non-slip rubber 7 is bonded and fixed on the top inner wall of the rectangular groove 6. A moving rod 8 is provided at the bottom of the hollow pedal 4, and a rectangular through hole 9 is provided at the top of the moving rod 8. A handle bar 10 is fixedly connected between the inner walls on both sides of the rectangular through hole 9. A finger avoidance groove 28 is provided at the bottom of the hollow pedal 4, and the finger avoidance groove 28 is located above the corresponding handle bar 10, which facilitates the avoidance and anti-squeezing effect of the upper part of the finger when the finger is inserted and the handle bar 10 is pulled;

[0036] Guide bars 11 are fixedly connected to both sides of the top of the moving rod 8, and the top of the guide bar 11 slides through the bottom of the corresponding hollow pedal 4 and extends into the inside thereof, wherein two vertical guide holes are provided on the inner wall of the bottom of the hollow pedal 4, which are respectively slidably fitted with the outer sides of the corresponding guide bars 11, so as to guide the vertical sliding of the guide bars 11. The tops of the two middle guide bars 11 among the four guide bars 11 are fixedly connected with friction locking components, and the two middle guide bars 11 are respectively located in the corresponding rectangular grooves 6, and the friction locking components are tightly contacted with the bottom of the corresponding hard anti-slip rubber 7; the friction locking components are used to generate friction when they are tightly fitted with the hard anti-slip rubber 7. The guide stopper 11 is locked in the lateral position to achieve locking of the hollow pedal 4; wherein the friction locking assembly includes a pressure block 14 and a plurality of pointed blocks 15, the top ends of the two guide stoppers 11 in the middle are respectively fixedly connected to the bottom ends of the corresponding pressure blocks 14, the top ends of the pressure blocks 14 are fixedly connected to the bottom ends of the corresponding plurality of pointed blocks 15, and the tips of the pointed blocks 15 are in close contact with the bottom ends of the corresponding hard anti-skid rubbers 7; the set pressure block 14 and the plurality of pointed blocks 15 cooperate, and the friction between the pointed blocks 15 and the corresponding hard anti-skid rubbers 7 is used to limit the pressure block 14, and the pressure block 14 is used to limit the corresponding guide stopper 11 and the hollow pedal 4, so as to facilitate locking of the hollow pedal 4 when it is telescopically adjusted;

[0037] An elastic tightening support assembly fixedly connected to the guide baffle rod 11 and fixedly connected to the inner wall of the bottom of the corresponding hollow pedal 4 is provided, and the elastic tightening support assembly is used to elastically tighten the guide baffle rod 11; wherein the elastic tightening support assembly comprises a support block 12 and a compression spring 13 in a compressed state, the support block 12 is fixedly connected to the outer side of the corresponding guide baffle rod 11, and the top and bottom ends of the compression spring 13 are respectively fixedly connected to the bottom of the corresponding support block 12 and the inner wall of the bottom of the hollow pedal 4; the provided support block 12 cooperates with the compression spring 13 in a compressed state, and the elastic force of the compression spring 13 in a compressed state is utilized to realize the upward elastic tightening support of the guide baffle rod 11 through the corresponding support block 12;

[0038] The bottom of the inner pedal 5 is fixedly connected with a reminder control assembly located between the two hollow pedals 4, and a touch-off switch 16 electrically connected to the reminder control assembly is fixedly installed on the top inner wall of the hollow pedal 4, wherein a mounting rod is fixedly installed between the top inner wall of the hollow pedal 4 and the top of the corresponding touch-off switch 16, and the touch-off switch 16 is fixedly installed on the top inner wall of the corresponding hollow pedal 4 through the mounting rod, so as to support the touch-off switch 16, and the inner pedal 5 is located between the two touch-off switches 16, and the top ends of the two guide bars 11 located on both sides are in close contact with the touch ends of the corresponding touch-off switches 16 respectively, and the reminder control assembly is used to provide a warning when the touch-off switch 16 and the corresponding guide bars 11 are in a separated state; wherein the reminder control assembly includes a U-shaped seat 17, a battery 29, a controller 19 and two red warning lights 18, and the top of the U-shaped seat 17 is fixedly connected to the bottom of the inner pedal 5, and the two The sides of the two red light warning lights 18 are respectively fixedly connected to the two sides of the U-shaped seat 17, the controller 19 and the battery 29 are fixedly connected to the left inner wall of the U-shaped seat 17, the red light warning light 18 and the controller 19 are electrically connected to the battery 29, and the two touch-off switches 16 and the two red light warning lights 18 are electrically connected to the controller 19; the U-shaped seat 17, the battery 29, the controller 19 and the two red light warning lights 18 are arranged to cooperate, after the handle bar 10 is pulled down to drive the guide baffle bar 11 to move down through the moving rod 8, when the guide baffle bar 11 contacts downwardly the squeeze-touch-off switch 16 in a squeeze-touch state, the touch-off switch 16 transmits a no squeeze signal to the controller 19, and the controller 19 controls the corresponding red light warning light 18 to turn on to warn the personnel, and when the guide baffle bar 11 moves up and squeezes and contacts the touch-off switch 16, the touch-off switch 16 transmits a close signal to the controller 19 to control the corresponding red light warning light 18 to turn off;

[0039] A groove 20 is provided on the adjacent side of the two claws 1, and an elastic self-locking limiting component is installed in the groove 20. The repelling sides of the two guide bars 11 on both sides are in active contact with the adjacent sides of the two elastic self-locking limiting components, and the repelling sides of the two elastic self-locking limiting components extend into the corresponding claws 1 respectively. The elastic self-locking limiting component is used to self-lock the circular cross support rod on the side of the external assembly frame after it is inserted into the claw 1; wherein the elastic self-locking limiting component includes two guide posts 21 fixedly connected to the inner wall of the corresponding groove 20 away from the opening side thereof, a guide sleeve 22 is slidably sleeved on the guide post 21, a limiting cross bar 25 is fixedly connected between the two guide sleeves 22 located in the same groove 20, and the guide posts 2 The end of 1 close to the inner pedal 5 is fixedly connected to the limit block 23, and a first spring 24 is fixedly connected between the guide sleeve 22 and the corresponding limit block 23. The first spring 24 is movably sleeved on the corresponding guide column 21. The repelling ends of the two limiting cross bars 25 extend into the corresponding claws 1 and are nested with extrusion balls 26. The adjacent sides of the two limiting cross bars 25 are nested with shielding balls 27. The repelling sides of the two guide blocking bars 11 on both sides are movably contacted with the adjacent sides of the two shielding balls 27. The claws 1 are slidably sleeved on the corresponding limiting cross bars 25, wherein the inner walls of the repelling sides of the two grooves 20 are both provided with guide through holes, and the inner walls of the guide through holes are slidably connected with the outer sides of the corresponding limiting cross bars 25. The claw 1 is slidably sleeved on the corresponding limiting cross bar 25 through a guide perforation, which plays the effect of guiding the lateral sliding of the limiting cross bar 25. A circular cross support rod on the side of the assembly frame is movably clamped in the claw 1, and the bottom of the side of the two circular cross support rods on the side of the assembly frame are respectively in rolling contact with the corresponding extrusion balls 26; the set guide column 21, guide sleeve 22, limiting cross bar 25, limit block 23, extrusion balls 26, shielding balls 27 and first spring 24 cooperate, when the guide blocking rod 11 moves down to release the shielding restriction on the corresponding shielding ball 27, the circular cross support rod on the side of the external assembly frame is clamped into the claw 1, and the corresponding extrusion ball 26 is squeezed when it is clamped, and under the extrusion force, the extrusion ball 26 moves and drives the corresponding The limiting cross bar 25 moves in the direction close to the inner pedal 5, and the limiting cross bar 25 drives the corresponding guide sleeve 22 to slide on the guide column 21 and compress the first spring 24. The limiting cross bar 25 drives the corresponding blocking ball 27 to move. After the circular cross support rod on the side of the assembly frame is inserted, the first spring 24 in the compressed state drives the limiting cross bar 25 to move back and reset through the corresponding guide sleeve 22, and squeezes and restricts the circular cross support rod on the side of the assembly frame, and drives the blocking ball 27 to move back and reset. If it is not completely moved back and reset, the blocking ball 27 will block the corresponding guide blocking rod 11 so that it cannot be completely reset upward, squeezing and touching the touch-to-close switch 16, thereby making the corresponding red warning light 18 in the on state to remind personnel.

[0040] When the lever 10 is pulled downward, the two guide bars 11 are moved downward, and the guide bars 11 drive the corresponding support blocks 12 to compress the compression springs 13 downward. The guide bars 11 in the middle drive the tip blocks 15 downward to separate the hard anti-skid rubber 7 through the corresponding pressure blocks 14, thereby releasing the friction locking state. At this time, the handle bar 10 is moved away from the U-shaped seat 17, and the handle bar 10 drives the hollow pedal 4 to slide outward on the inner pedal 5 through the moving rod 8 and the two guide bars 11 in turn, so that the overall pedal length changes, thereby achieving the effect of telescopic adjustment. When the guide bars 11 on the side move downward, they are also separated from the corresponding light touch-off switch 16 downward to release the squeezing state. At this time, the light touch-off switch 16 transmits a no squeezing signal to the controller 19, and the controller 19 controls the corresponding red warning light 18 to turn on. The lit red warning light 18 is used to remind personnel that the vehicle is in an unlocked and unrestricted state.

[0041] When the guide blocking rod 11 at the side moves downward, it also releases the blocking of the corresponding blocking ball 27. At this time, the claw 1 is clamped on the corresponding circular cross bar on the side of the external assembly frame. When the circular cross bar on the side of the external assembly frame enters the claw 1 during the clamping, it squeezes the extrusion ball 26. Since the guide blocking rod 11 at the side is separated from the blocking ball 27 and is in an unblocked restriction state, under the extrusion force, the extrusion ball 26 moves and drives the corresponding restriction cross bar 25 to approach the inner pedal. 5, the limiting cross bar 25 drives the corresponding guide sleeve 22 to slide on the guide column 21 and compresses the first spring 24, and the limiting cross bar 25 drives the corresponding shielding ball 27 to move. After the circular cross support rod on the side of the assembly rack is inserted, the first spring 24 in the compressed state drives the limiting cross bar 25 to move back and reset through the corresponding guide sleeve 22, and squeezes and restricts the circular cross support rod on the side of the assembly rack, and drives the shielding ball 27 to move back and reset; at this time, the pulling force on the handle bar 10 is released, and the handle bar 10 is in a compressed state. The elastic force of the compression spring 13 in the retracted state drives the guide stopper 11 to move back and reset upwards through the corresponding support block 12, and the guide stopper 11 in the middle drives the tip block 15 to squeeze and contact with the hard non-slip rubber 7 through the corresponding pressure block 14. Under the friction force of the tip block 15 and the corresponding hard non-slip rubber 7, the hollow pedal 4 after telescopic adjustment is locked, and the guide stopper 11 at the side moves upward to squeeze and touch the corresponding light touch closing switch 16, so that it transmits a closing signal to the controller 19, and the controller 19 controls the corresponding red light warning light 18 to turn off. The personnel can accurately judge that it is in the self-locking state of the clamping and telescopic dual positions by watching the red light warning light 18 turn off. At this time, the guide stopper 11 at the side blocks and restricts the corresponding blocking ball 27, so that the limiting cross bar 25 cannot move before it is unlocked separately, thereby realizing the effect of mutually restraining the telescopic locking and self-locking, realizing the stable restriction of the clamping claw 1, avoiding the phenomenon of automatic unlocking of the clamping claw 1 due to accidental contact, and improving the self-locking stability;

[0042] In addition, if the limiting cross bar 25 is not completely moved back and reset, the blocking ball 27 cannot be completely moved back and reset, which will block the top of the corresponding guide blocking rod 11, so that it cannot be completely reset upward to squeeze and touch the touch-off switch 16, thereby making the corresponding red light warning light 18 in the on state to remind personnel, so that the overall pedal length can be quickly unlocked by simply pulling, and the pedal length can be adjusted telescopically, and the claw 1 can be self-locked when it is clamped on the circular cross support rod of the assembly frame, and the corresponding red light warning light 18 can be controlled to turn on and off respectively when it is not self-locked and after self-locking, so that a warning effect can be achieved when clamping and locking, which is convenient for personnel to make accurate judgments and reduce the risk of separation;

[0043] When the self-locking state needs to be released later, the handle rod 10 is pulled downward again. The movement process is the same as that of pulling the handle rod 10 downward as mentioned above, so that the guide blocking rod 11 moves downward again to release the blocking restriction on the corresponding blocking ball 27. At this time, the claw 1 can be moved upward to drive the extrusion ball 26 to form an extrusion with the outer side of the circular cross support rod on the side of the assembly frame again, so that the extrusion ball 26 is displaced again and drives the corresponding limiting cross bar 25 to displace to release the blocking restriction state, and the claw 1 can be separated from the circular cross support rod on the side of the assembly frame.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A self-locking mechanism for a telescopic pedal of an assembly frame, comprising two claws (1), the bottom of each claw (1) being provided with a buckle groove (2) with both the front and rear sides being open, the bottom of both inner walls of the buckle groove (2) being provided with inclined surfaces (3), characterized in that: A hollow pedal (4) is fixedly connected to the adjacent side of the two clamping claws (1), and a same inner pedal (5) is provided in the sliding sleeve inside the two hollow pedals (4). Two rectangular grooves (6) are provided at the bottom of the inner pedal (5), and a hard non-slip rubber (7) is bonded and fixed on the top inner wall of the rectangular groove (6). A moving rod (8) is provided below the hollow pedal (4), and a rectangular through hole (9) is provided at the top of the moving rod (8). A handle rod (10) is fixedly connected between the inner walls on both sides of the rectangular through hole (9); Both sides of the top of the moving rod (8) are fixedly connected with guide bars (11), the top of the guide bars (11) slides through the bottom of the corresponding hollow pedal (4) and extends into the inside thereof, the tops of the two middle guide bars (11) among the four guide bars (11) are fixedly connected with friction locking components, and the friction locking components are tightly contacted with the bottom of the corresponding hard anti-skid rubber (7); the guide bars (11) are fixedly connected with an elastic tightening support component fixedly connected to the inner wall of the bottom of the corresponding hollow pedal (4); The bottom of the inner pedal (5) is fixedly connected to a reminder control assembly located between the two hollow pedals (4); a light touch off switch (16) electrically connected to the reminder control assembly is fixedly installed on the top inner wall of the hollow pedal (4); the top ends of the two guide bars (11) located on both sides are in close contact with the corresponding touch ends of the light touch off switch (16); A groove (20) is provided on the adjacent side of the two clamping claws (1), and an elastic self-locking limiting component is installed in the groove (20). The repelling sides of the two guide blocking rods (11) located on both sides are in active contact with the adjacent sides of the two elastic self-locking limiting components, and the repelling sides of the two elastic self-locking limiting components extend into the corresponding clamping claws (1). The friction locking assembly comprises a pressure block (14) and a plurality of pointed blocks (15), the top ends of the two guide bars (11) located in the middle are respectively fixedly connected to the bottom ends of the corresponding pressure blocks (14), the top ends of the pressure blocks (14) are fixedly connected to the bottom ends of the corresponding plurality of pointed blocks (15), and the tips of the pointed blocks (15) are in close contact with the bottom ends of the corresponding hard anti-skid rubber (7); The elastic tightening support assembly comprises a support block (12) and a compression spring (13) in a compressed state, wherein the support block (12) is fixedly connected to the outer side of the corresponding guide stopper rod (11), and the top and bottom ends of the compression spring (13) are respectively fixedly connected to the bottom of the corresponding support block (12) and the bottom inner wall of the hollow pedal (4); The reminder control assembly comprises a U-shaped seat (17), a battery (29), a controller (19) and two red warning lights (18); the top of the U-shaped seat (17) is fixedly connected to the bottom of the inner pedal (5); the adjacent sides of the two red warning lights (18) are respectively fixedly connected to the two sides of the U-shaped seat (17); the controller (19) and the battery (29) are both fixedly connected to the left inner wall of the U-shaped seat (17); the red warning lights (18) and the controller (19) are both electrically connected to the battery (29); and the two touch-off switches (16) and the two red warning lights (18) are both electrically connected to the controller (19); The elastic self-locking limiting assembly comprises two guide columns (21) fixedly connected to the inner wall of the corresponding groove (20) away from the opening thereof, a guide sleeve (22) is slidably sleeved on the guide column (21), a limiting cross bar (25) is fixedly connected between the two guide sleeves (22) located in the same groove (20), a limiting block (23) is fixedly connected to one end of the guide column (21) close to the inner pedal (5), and a first spring is fixedly connected between the guide sleeve (22) and the corresponding limiting block (23). (24), the first spring (24) is movably mounted on the corresponding guide column (21), the repelling ends of the two limiting cross bars (25) respectively extend into the corresponding clamping claws (1) and are embedded with extrusion balls (26), the adjacent sides of the two limiting cross bars (25) are embedded with blocking balls (27), the repelling sides of the two guide blocking bars (11) located on both sides are movably contacted with the adjacent sides of the two blocking balls (27), and the clamping claws (1) are slidably mounted on the corresponding limiting cross bars (25).

2. The self-locking mechanism of the telescopic pedal of the assembly rack according to claim 1, characterized in that: A finger avoidance groove (28) is provided at the bottom of the hollow pedal (4), and the finger avoidance groove (28) is located above the corresponding handlebar (10).

3. The self-locking mechanism of the telescopic pedal of the assembly rack according to claim 1, characterized in that: The two guide blocking rods (11) located in the middle are respectively located in the corresponding rectangular grooves (6).

4. The self-locking mechanism of the telescopic pedal of the assembly rack according to claim 1, characterized in that: The inner pedal (5) is located between two touch-to-close switches (16).

5. The self-locking mechanism of the telescopic pedal of the assembly rack according to claim 1, characterized in that: The bottom inner wall of the hollow pedal (4) is provided with two vertical guide holes which are respectively slidably fitted onto the outer sides of corresponding guide blocking rods (11).

6. The self-locking mechanism of the telescopic pedal of the assembly rack according to claim 1, characterized in that: The claw (1) is movably engaged with a circular cross-bracing rod on the side of the assembly rack, and the bottoms of the adjacent sides of the circular cross-bracing rods on the side of the two assembly racks are in rolling contact with corresponding extrusion balls (26) respectively.

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