Lifting device with self-locking and unlocking functions in a nuclear environment

Abstract

The present invention discloses a hoisting device with self-locking and unlocking functions in a nuclear environment, comprising: a boom, two clamping mechanisms, and a mounting base for mounting a forklift fork; the clamping mechanism includes: a connecting seat, two clamping plates, a guiding shaft for guiding the movement of the clamping plates, and two locking components for respectively locking and unlocking the positions of the two clamping plates; the locking component includes: a moving plate provided with a first rack, a gear, a second rack, and a guiding rod; the second rack is slidably connected to the clamping plate; the gear is rotatably connected to the clamping plate and meshes with the first rack and the second rack at the same time; the guiding rod is fixed to the connecting seat and is formed with ratchet teeth; the clamping plate is rotatably connected by a rotating shaft with a ratchet tongue for inserting or pulling out the ratchet teeth; a torsion spring is sleeved on the outer periphery of the rotating shaft; the second rack is provided with a lever. The hoisting device with self-locking and unlocking functions in a nuclear environment provided by the present invention can achieve stable handling of the forklift fork, quickly disassemble and assemble the mounting base, and accurately position the mounting position of the forklift fork.

Description

Technical Field

[0001] The invention relates to the field of lifting forks, and in particular to a lifting device with self-locking and unlocking functions in a nuclear environment. Background Art

[0002] At present, the replacement of forks is usually done by manual lifting, which often causes accidents such as pinching hands, falling, and hitting feet. The environment in a nuclear environment is complex, and manual labor poses safety risks. It is inconvenient and unsafe to replace forks in a nuclear environment using the above replacement method. If the forks are replaced by a crane and a sling, due to the special site of the nuclear environment, there are no suitable manual handling conditions, and the positioning accuracy of the crane and the sling is very low, and there is a lot of shaking, so assembly is more difficult. Summary of the invention

[0003] At present, when testing forks in a nuclear environment, they are either carried and installed manually or carried by slings. The environment in a nuclear environment is complex, and manual labor poses safety risks. It is inconvenient and unsafe to replace forks in a nuclear environment by manual handling, and accidents such as pinching hands, falling, and hitting feet often occur. Replacing forks by lifting with a crane or slings has problems such as large shaking and low installation positioning accuracy, so assembly is more difficult.

[0004] In order to solve the above problems, the present invention provides a hoisting device with self-locking and unlocking functions in a nuclear environment, which adopts the following technical solutions:

[0005] A hoisting device with self-locking and unlocking functions under a nuclear environment comprises: a hoisting rod, two clamping mechanisms and a mounting base for mounting a fork; the two clamping mechanisms are respectively connected to the two ends of the hoisting rod; the clamping mechanism comprises: a connecting seat, two clamping plates for clamping the fork, a guide shaft for guiding the movement of the clamping plates and two locking components for respectively locking and unlocking the positions of the two clamping plates; the guide shaft is supported on the connecting seat; the two clamping plates are respectively slidably sleeved on the outer periphery of the guide shaft; the locking component comprises: a moving plate provided with a first rack, a gear, a second rack and a guide rod; the second rack is slidably connected to the clamping plate; the gear rotates It is connected to the splint and meshes with the first rack and the second rack at the same time; the guide rod is fixed to the connecting seat and is formed with ratchet teeth; the splint is connected to a ratchet tongue for inserting or pulling out the ratchet teeth by rotating through a rotating shaft; a torsion spring is provided on the outer peripheral sleeve of the rotating shaft; one end of the torsion spring is inserted into the hole of the splint and the other end is inserted into the hole of the ratchet tongue to press the ratchet tongue so that the teeth of the ratchet tongue are inserted into the ratchet teeth; the second rack is provided with a lever for overcoming the elastic force of the torsion spring to move the ratchet tongue so that the teeth of the ratchet tongue are disengaged from the ratchet teeth; the splint is provided with two limit blocks for limiting the moving distance of the first rack and driving the splint to move along the guide shaft through the moving plate; the two limit blocks are respectively located at the two ends of the first rack.

[0006] Further, when the lower end of the clamping plate clamps the forklift fork, it compresses the spring pin of the forklift fork for locking the forklift fork and the mounting base, so that the spring pin disengages from the mounting base.

[0007] Further, the mounting base is formed with a locking portion for locking and mounting the forklift fork; the locking portion is formed with a locking hole; the clamping plate presses the pin of the spring pin of the forklift fork to move it between a position inserted into the locking hole and a position disengaged from the locking hole.

[0008] Further, the pin is formed with a first pin and a second pin; the first pin is fixed to the second pin; the first pin extends and retracts in the locking hole formed in the forklift fork; the second pin extends and retracts in the locking hole formed in the locking portion; the lower end of the clamping plate contacts the first pin.

[0009] Further, the clamping plate is formed with a receiving groove for receiving the guide rod.

[0010] Further, the ratchet teeth are distributed along the extending direction of the guide rod.

[0011] Further, the clamping plate is formed with two guide grooves; the first rack and the second rack are respectively slidably disposed in the two guide grooves.

[0012] Further, the clamping plate is further provided with a guide rail for guiding the movement of the moving plate; the guide rail is slidably connected with a support member for supporting the moving plate; the moving plate is fixed to the support member.

[0013] Further, the connecting seat is formed with a guiding portion for guiding the clamping mechanism to clamp the forklift fork.

[0014] Further, the bottom of the clamping plate is formed with a supporting portion for abutting against the lower end of the forklift fork to support the forklift fork.

[0015] The beneficial effect of the present invention is that the lifting device with self-locking and unlocking functions in the nuclear environment can perform self-locking and unlocking. When replacing the forklift fork in the nuclear environment, manual handling is not required, the disassembly and installation of the mounting base can be quickly realized, and the stable handling of the forklift fork and the accurate positioning of the forklift fork installation position can be achieved, that is, both safety and efficiency are high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the lifting device with self-locking and unlocking functions in the nuclear environment of the present invention;

[0017] Figure 2 is Figure 1 a schematic diagram of a partial structure of the lifting device with self-locking and unlocking functions in the nuclear environment in

[0018] Figure 3 is Figure 2 a partial enlarged view of the lifting device with self-locking and unlocking functions in the nuclear environment in

[0019] Lifting device 10 with self-locking and unlocking functions in a nuclear environment, boom 11, clamping mechanism 12, connecting seat 121, guiding part 122, clamping plate 123, receiving groove 1231, guiding groove 1232, supporting part 1233, guiding shaft 124, supporting member 125, guide rail 126, moving plate 127, first rack 128, gear 129, second rack 130, guiding rod 131, ratchet teeth 1311, ratchet tongue 132, torsion spring 133, lever 134, limiting block 135, mounting base 14, locking part 141, locking hole 142, forklift 100, spring pin 101. Detailed implementation mode

[0020] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0021] As Figure 1 shown, a lifting device 10 with self-locking and unlocking functions in a nuclear environment according to the present invention includes: a boom 11, two clamping mechanisms 12 and a mounting base 14. The mounting base 14 is used to mount the forklift 100. When replacing and handling the forklift 100, the forklift 100 needs to be disassembled from the mounting base 14. The two clamping mechanisms 12 are respectively connected to both ends of the boom 11 to clamp both ends of the forklift 100 when handling the forklift 100, so as to lift the forklift 100. The boom 11 is fixedly combined by two lifting beams, and a lifting ring is provided at the connection of the two lifting beams. In this way, when lifting the forklift 100, the forklift 100 can be prevented from swaying, so as to achieve stable handling. When installing the forklift 100, the installation position between the forklift 100 and the mounting base 14 can also be accurately positioned.

[0022] As Figure 2 and Figure 3 shown, the specific structure of this solution is that the clamping mechanism 12 includes: a connecting seat 121, two clamping plates 123, a guiding shaft 124 and a locking assembly. The clamping plates 123 are used to clamp the forklift 100 from both sides of the forklift 100. The guiding shaft 124 is used to guide the movement of the clamping plates 123 so that the two clamping plates 123 clamp both sides of the forklift 100. The two locking assemblies are used to lock and unlock the positions of the two clamping plates 123 respectively, so that when it is necessary to loosen the clamping plates 123, the positions of the clamping plates 123 can be unlocked so that the clamping plates 123 can be separated from the forklift 100, and when it is necessary to clamp the forklift 100, the positions of the clamping plates 123 can be locked to ensure the stability of the clamping structure. The guiding shaft 124 is supported on the connecting seat 121, and the two clamping plates 123 are respectively slidably sleeved on the outer periphery of the guiding shaft 124, so that the two clamping plates 123 can move between clamping the forklift 100 and loosening the forklift 100.

[0023] As Figure 3As shown, the locking component includes a moving plate 127, a gear 129, a second rack 130, and a guide rod 131. The moving plate 127 is provided with a first rack 128. The second rack 130 is slidably connected to the clamping plate 123. The gear 129 is rotatably connected to the clamping plate 123 and meshes with both the first rack 128 and the second rack 130 simultaneously. The guide rod 131 is fixed to the connecting seat 121 and is formed with ratchet teeth 1311. The clamping plate 123 is rotatably connected with a ratchet tongue 132 through a rotating shaft. The ratchet tongue 132 is used to insert into or pull out of the ratchet teeth 1311. A torsion spring 133 is sleeved on the outer periphery of the rotating shaft. One end of the torsion spring 133 is inserted into a hole of the clamping plate 123 and the other end is inserted into a hole of the ratchet tongue 132 to press the ratchet tongue 132 so that the teeth of the ratchet tongue 132 are inserted into the ratchet teeth 1311. The second rack 130 is provided with a lever 134. The lever 134 is used to overcome the elastic force of the torsion spring 133 to toggle the ratchet tongue 132 so that the teeth of the ratchet tongue 132 are disengaged from the ratchet teeth 1311. The clamping plate 123 is provided with two limiting blocks 135. The limiting blocks 135 are used to limit the moving distance of the first rack 128 and drive the clamping plate 123 to move along the guide shaft 124 through the moving plate 127. The two limiting blocks 135 are respectively located at both ends of the first rack 128.

[0024] Specifically, when it is necessary to clamp and carry the fork 100, the two moving plates 127 are clamped by the clamp at the same time so that the two moving plates 127 move toward each other. When the moving plate 127 moves, the first rack 128 is driven to move. The first rack 128 is connected to the driving gear 129 by meshing. When the gear 129 rotates, it drives the second rack 130 to slide on the clamping plate 123 along the first direction. When the first rack 128 moves to contact the limit block 135 located at one end of the first rack 128, since the ratchet tongue 132 is in an unlocked state with the ratchet 1311 in the first direction, that is, the ratchet tongue 132 can slide along the ratchet 1311 in the first direction, so the clamping plate 123 can move along the guide shaft 124 in the first direction, and then the moving plate 127 drives the clamping plate 123 to move in the direction close to the fork 100 through the limit block 135 until the fork 100 is clamped. At this time, the clamp is released. Since the ratchet tongue 132 is in a locked state with the ratchet tooth 1311 in the second direction opposite to the first direction, that is, the ratchet tongue 132 locks the position of the clamp plate 123, which can prevent the clamp plate 123 from moving in the opposite direction, thereby ensuring that the clamp plate 123 can stably remain in the state of clamping the fork 100. When the fork 100 is transported and the clamping mechanism 12 needs to be disassembled, the clamp is used to act on the two moving plates 127 at the same time to make the other moving plate 127 move in a direction away from each other. When the moving plate 127 moves, the first rack 128 drives the gear 129 again through the meshing connection. When the gear 129 rotates, it will drive the second rack 130 to slide on the clamp plate 123 in the second direction, thereby driving the lever 134 to slide in the second direction. When the first rack 128 moves to contact the limit block 135 located at the other end of the first rack 128, the lever 134 passes through the ratchet tongue 132 and overcomes the torsion force of the torsion spring 133 to press the raised end of the ratchet tongue 132, so that the teeth of the ratchet tongue 132 are disengaged from the ratchet teeth 1311, that is, the ratchet tongue 132 and the ratchet teeth 1311 enter an unlocked state. At this time, the splint 123 can move along the second direction on the guide shaft 124, that is, continuing to push the movable plate 127 can make the splint 123 disengage from the fork 100, thereby completing the disassembly of the clamping mechanism 12.

[0025] The lifting device 10 with self-locking and unlocking functions in a nuclear environment provided by the present invention can be self-locking and unlocking, and does not require manual handling when replacing the fork 100, and can stably carry the fork 100 and accurately locate the installation position of the fork 100.

[0026] As a specific implementation manner, when the fork 100 is installed on the mounting base 14, the installation position of the fork 100 and the mounting base 14 is locked by a spring pin 101 arranged inside. When the lower end of the clamping plate 123 clamps the fork 100, it can overcome the elastic force of the spring of the spring pin 101 to compress the pin, so that the pin disengages from the mounting base 14, and then unlocks the fork 100 and the mounting base 14, realizing the quick disassembly of the mounting base 14 while clamping the fork 100, which is convenient to use and has higher efficiency.

[0027] Specifically, the mounting base 14 is formed with a locking portion 141. The locking portion 141 is used to lock the installation of the fork 100. The locking portion 141 is formed with a locking hole 142. The clamping plate 123 presses the pin of the spring pin 101 of the fork 100 to move it between the position where it is inserted into the locking hole 142 and the position where it disengages from the locking hole 142. Among them, the pin is formed with a first pin and a second pin. The first pin is fixed to the second pin and is arranged parallel to the second pin. The first pin extends and retracts in the locking hole 142 formed in the fork 100, and the second pin extends and retracts in the locking hole 142 formed in the locking portion 141. The lower end of the clamping plate 123 contacts the first pin. In this way, when the clamping plate 123 clamps the fork 100, the first pin will be compressed, causing the first pin to disengage from the locking hole 142 formed in the fork 100 and retract into the inside of the fork 100. At the same time, the first pin drives the second pin to disengage from the locking hole 142 formed in the locking portion 141 and retract into the inside of the fork 100, thus completing the disassembly of the fork 100.

[0028] As a specific implementation manner, the clamping plate 123 is formed with a receiving groove 1231. The guide rod 131 is located in the receiving groove 1231, and the groove wall of the receiving groove 1231 fits with the guide rod 131, so that the clamping plate 123 slides stably along the guide rod 131, increasing the stability of the structure. The ratchet teeth 1311 are distributed along the extending direction of the guide rod 131.

[0029] As a specific implementation manner, the clamping plate 123 is formed with two guide grooves 1232. The first rack 128 and the second rack 130 are respectively slidably arranged in the two guide grooves 1232, so as to ensure the sliding stability of the first rack 128 and the second rack 130.

[0030] As a specific implementation manner, the clamping plate 123 is further provided with a guide rail 126. The guide rail 126 is used to guide the movement of the moving plate 127. The guide rail 126 is slidably connected with a support member 125. The support member 125 is used to support the moving plate 127. The moving plate 127 is fixed to the support member 125. Through the cooperation of the guide rail 126 and the support member 125, the first rack 128 guides the moving block to move, and the structure is more stable.

[0031] As a specific implementation manner, the connecting seat 121 is formed with a guiding portion 122. The guiding portion 122 is used for guiding the clamping mechanism 12 to clamp the forklift fork 100. When clamping the forklift fork 100, the guiding portions 122 located at both ends of the suspension rod 11 are stuck at both ends of the forklift fork 100, so that the pre-positioning of the handling of the forklift fork 100 can be completed, and the clamping efficiency can be improved.

[0032] As a specific implementation manner, a supporting portion 1233 is formed at the bottom of the clamping plate 123. The supporting portion 1233 is used for abutting against the lower end of the forklift fork 100 to support the forklift fork 100, so as to ensure the stability of handling the forklift fork 100.

[0033] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by using equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A hoisting device with self-locking and unlocking functions in a nuclear environment, comprising: A suspension rod, two clamping mechanisms, and a mounting base for mounting a forklift fork; The two clamping mechanisms are respectively connected to two ends of the suspension rod; characterized in that, the clamping mechanism includes: a connecting seat, two clamping plates for clamping the forklift fork, a guiding shaft for guiding the movement of the clamping plates, and two locking components for respectively locking and unlocking the positions of the two clamping plates; the guiding shaft is supported on the connecting seat; the two clamping plates are respectively slidably sleeved on the outer periphery of the guiding shaft; the locking component includes: a moving plate provided with a first rack, a gear, a second rack, and a guiding rod; the second rack is slidably connected to the clamping plate; the gear is rotatably connected to the clamping plate and meshes with the first rack and the second rack at the same time; the guiding rod is fixed to the connecting seat and is formed with ratchet teeth; the clamping plate is rotatably connected by a rotating shaft with a ratchet tongue for inserting or pulling out the ratchet teeth; a torsion spring is sleeved on the outer periphery of the rotating shaft; one end of the torsion spring is inserted into the hole of the clamping plate and the other end is inserted into the hole of the ratchet tongue to press the ratchet tongue so that the teeth of the ratchet tongue are inserted into the ratchet teeth; the second rack is provided with a lever for overcoming the elastic force of the torsion spring to toggle the ratchet tongue so that the teeth of the ratchet tongue are disengaged from the ratchet teeth; the clamping plate is provided with two limiting blocks for defining the moving distance of the first rack and driving the clamping plate to move along the guiding shaft through the moving plate; the two limiting blocks are respectively located at two ends of the first rack.

2. The hoisting device with self-locking and unlocking functions in a nuclear environment according to claim 1, characterized in that, When the clamping plate clamps the forklift fork at the lower end, it compresses the spring pin for locking the forklift fork and the mounting base so that the spring pin disengages from the mounting base.

3. The hoisting device with self-locking and unlocking functions in a nuclear environment according to claim 2, characterized in that, The mounting base is formed with a locking portion for locking and mounting the forklift fork; the locking portion is formed with a locking hole; the clamping plate presses the pin of the spring pin of the forklift fork to move it between a position where it is inserted into the locking hole and a position where it is disengaged from the locking hole.

4. The hoisting device with self-locking and unlocking functions in a nuclear environment according to claim 3, characterized in that, The pin is formed with a first pin and a second pin; the first pin is fixed to the second pin; the first pin telescopically moves in the locking hole formed in the forklift fork; the second pin telescopically moves in the locking hole formed in the locking portion; The lower end of the clamping plate contacts the first pin.

5. The hoisting device with self-locking and unlocking functions in a nuclear environment according to claim 1, characterized in that, The clamping plate is formed with a receiving groove for receiving the guiding rod.

6. The hoisting device with self-locking and unlocking functions in a nuclear environment according to claim 5, characterized in that, The ratchet teeth are distributed along the extending direction of the guiding rod.

7. The hoisting device with self-locking and unlocking functions in a nuclear environment according to claim 1, characterized in that, The clamping plate is formed with two guiding grooves; the first rack and the second rack are respectively slidably arranged in the two guiding grooves.

8. The hoisting device with self-locking and unlocking functions in a nuclear environment according to claim 1, wherein, The clamping plate is further provided with a guide rail for guiding the movement of the moving plate; the guide rail is slidably connected with a support member for supporting the moving plate; the moving plate is fixed to the support member.

9. The hoisting device with self-locking and unlocking functions in a nuclear environment according to claim 1, wherein, The connecting seat is formed with a guiding portion for guiding the clamping mechanism to clamp the forklift fork.

10. The hoisting device with self-locking and unlocking functions in a nuclear environment according to claim 1, wherein, The bottom of the clamping plate is formed with a supporting portion for abutting against the lower end of the forklift fork to support the forklift fork.

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