Secondary masonry small transport vehicle hoist bucket

Abstract

This invention discloses a hoisting bucket for a small transport vehicle used for secondary construction, specifically relating to the field of hoisting buckets for small transport vehicles. It includes a frame with three side panels and a protective door installed around its interior. One end of the protective door is hinged to the outer surface of the frame, and a locking component is provided on the outer surface of one end of the protective door, locking the door to the frame. A bottom plate is fixedly installed at the bottom of the frame, with a storage groove on one side of the bottom plate. A steel plate ramp is provided inside the storage groove, and limit components are provided at both ends of the steel plate ramp to limit its movement. By providing a steel plate ramp inside the bottom, this invention allows the small transport vehicle to enter the bucket by pulling out the ramp. After being pulled out, the ramp is limited by limit posts at both ends, increasing its stability.

Description

Technical Field

[0001] This invention relates to the field of small transport vehicle hoisting buckets, and more specifically, to a small transport vehicle hoisting bucket for secondary masonry construction. Background Technology

[0002] After the main structure of the building is completed, the interior partition walls need mortar and the structural columns need concrete. At this time, the roof slab of each floor has been completed. The tower crane can directly lift a hopper full of concrete to the unloading platform of each floor. Generally, a tricycle is used to drive onto the unloading platform, and the hopper is placed on the tricycle or other transportation vehicle to transport it to the floor for unloading.

[0003] However, it is relatively unsafe for tricycles to drive directly onto the unloading platform. If the throttle is too strong and the protective iron plate is damaged and the vehicle is thrown out, it would be very dangerous. Alternatively, if the vehicle crashes into the protective iron plate, it would also pose a risk to the unloading platform. Manual transport vehicles are time-consuming and labor-intensive.

[0004] Existing hoisting and storage tools, such as CN223509481U, involve a special hoisting and storage tool for gas cylinders, including a placement plate; a ground-mounted support frame connected to the bottom wall of the placement plate; a receiving frame connected to the placement plate, located on the side of the placement plate away from the ground-mounted support frame, and forming a cavity with a single-sided opening; a blocking ramp plate rotatably connected to the receiving frame, and capable of cooperating with the receiving frame to form a receiving cavity; and a fixing member connected to the receiving frame and the blocking ramp plate. This application has the advantages of creating a certain gap between the ground-mounted support frame and the ground through the ground-mounted support frame, thereby reducing the possibility of gas cylinders being damaged by rainwater or pollutants on the ground; and forming a loading ramp for gas cylinders to climb after rotation through the blocking ramp plate, which facilitates workers to move the gas cylinders into the receiving cavity.

[0005] While the above solutions enable the transfer of materials to the hoisting bucket, to facilitate material feeding into the bucket, a wedge plate is typically placed on the bucket as a ramp transition, or a detachable or pull-out ramp bottom plate is installed at the bottom of the bucket. However, during the material feeding process into the bucket, the wedge plate is prone to slipping back or the bottom plate being pushed back, requiring additional personnel to support or step on it. Therefore, the transfer operation requires at least two people, and the above operations do not completely eliminate the danger and may pose a potential hazard to the operators. In addition, the tilt angle of the wedge plate cannot be adjusted, making it difficult to accommodate the feeding of materials of different heights. Summary of the Invention

[0006] To overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a hoisting bucket for a small transport vehicle used for secondary masonry construction. By providing a steel plate ramp inside the bottom, when a small transport vehicle needs to enter, the internal steel plate ramp can be pulled out, making it easier for the small transport vehicle to enter the bucket through the steel plate ramp. After the steel plate ramp is pulled out, it is limited by the limiting posts at both ends to increase the stability of the steel plate ramp.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a hoisting bucket for a small secondary masonry transport vehicle, comprising a frame, wherein three side panels and a protective door are installed around the inside of the frame, and one end of the protective door is hinged to the outer surface of the frame, and a locking component is provided on the outer surface of one end of the protective door, and the protective door is locked to the frame by the locking component.

[0008] The base plate is fixedly installed at the bottom of the frame. A storage groove is provided on one side of the interior of the base plate. A steel plate ramp is provided inside the storage groove. A limiting component is provided at both ends of the steel plate ramp to limit the movement of the steel plate ramp.

[0009] Furthermore, a side frame is fixedly installed at one end of the base plate, and a connecting cylinder is fixedly installed at one end of the steel plate ramp. The steel plate ramp is rotatably connected to the side frame through the connecting cylinder. The steel plate ramp is lowered down along the side frame, making it convenient for small transport vehicles to enter the interior of the bucket through the steel plate ramp.

[0010] Furthermore, the limiting component includes a limiting block disposed at one end of the connecting cylinder, and a limiting cavity matching one end of the limiting block is opened on the outer surface of one end of the side frame. A sliding rod is fixedly installed at one end of the limiting block, and the sliding rod is slidably connected to the connecting cylinder. When the connecting cylinders at both ends enter the side frame, the limiting block at one end is pushed inward by the sliding rod, so that one end of the limiting block is inserted into the limiting cavity of the side frame.

[0011] The slide rod is inserted into the connecting cylinder for sliding connection. The slide rod body has two symmetrical first slide grooves. Corresponding to the first slide grooves, two first protruding ridges are provided on the inner wall of the connecting cylinder. The extension length direction of the first protruding ridges and the first slide grooves is parallel to the central axis of the connecting cylinder body. Multiple second protruding ridges are provided on the limiting block. The height of the multiple second protruding ridges is gradually differentiated. Corresponding to the second protruding ridges, multiple second slide grooves are provided in the limiting cavity.

[0012] Furthermore, the locking assembly includes a lock frame fixedly installed on the outer surface of the protective door. A handle is fixedly installed on the outer surface of the lock frame. When it is necessary to drive the small transport vehicle into the bucket, the upper pressure rod inside the lock frame is pressed first, and the locking pin is disengaged from the lock buckle through the connecting block, thereby releasing the restriction on the protective door, and then the protective door is opened.

[0013] Furthermore, a locking pin is provided at the top of the lock frame, and a latch matching the top of the locking pin is fixedly installed on the outer surface of the frame. A pressure rod is provided at the top of the lock frame on one side of the locking pin, and a connecting block is integrally connected to the bottom end of the pressure rod. One end of the connecting block is fixedly connected to the outer surface of the locking pin. A return spring is provided inside the lock frame at the bottom end of the connecting block. When the protective door is closed, the return spring will push the locking pin upward and insert it into the latch for locking.

[0014] Furthermore, lifting rings are installed at the four corners of the top of the frame, and mounting rings are fixedly installed at the bottom of the lifting rings. A mounting block is fixedly installed at the bottom of the mounting rings at the top of the frame, and the mounting rings are threadedly connected to the mounting blocks. Rotating the lifting rings causes the mounting rings at the bottom to detach from the mounting blocks, allowing the lifting rings to be removed for replacement and maintenance.

[0015] Furthermore, both the mounting block and the mounting ring have through grooves on their outer surfaces. A rod is inserted into the through groove, and a knob is threaded to one end of the rod. By using a tool to turn the knob at one end of the rod, the knob can be removed from the rod. Then, the rod can be pushed out of the through groove between the mounting ring and the mounting block, thus releasing the mounting block and the mounting ring from their limiting positions.

[0016] Furthermore, an opening is provided on one side of the lifting ring, and a locking pin is provided inside the opening. A magnetic block is embedded at the top of the inner wall of the opening. When the ring is connected to the tower crane after replacement, the locking pin will be attracted by the magnetic force of the magnetic block at one end to close the opening.

[0017] Furthermore, the outer surface of the lifting ring is provided with a sliding groove, and a sliding button is provided on the outer surface of the sliding groove. One end of the sliding button passes through the sliding groove and is fixedly connected to the outer surface of the locking pin. First, slide the sliding button along the sliding groove to drive the locking pin to open the opening on one side of the lifting ring, so as to facilitate the disconnection of the lifting ring from the tower crane.

[0018] The technical effects and advantages of this invention are as follows:

[0019] 1. This invention utilizes a sliding rod inserted into a connecting cylinder for sliding connection. The sliding rod has two symmetrical first grooves, and corresponding to these first grooves, two first protruding ridges are provided on the inner wall of the connecting cylinder. The extension lengths of the first protruding ridges and the first grooves are parallel to the central axis of the connecting cylinder. Multiple second protruding ridges are provided on the limiting block, with varying heights. Corresponding to these second protruding ridges, multiple second grooves are provided within the limiting cavity. This design allows for reliable locking when material is pushed into the hopper via an inclined ramp, and enables adjustment of the angle and height of the inclined steel plate ramp to accommodate different material heights. This significantly improves adaptability to various scenarios, increases operational safety, and reduces the number of personnel required.

[0020] 2. This invention features a steel plate ramp inside the bottom. When a small transport vehicle needs to enter, the internal steel plate ramp can be pulled out, allowing the vehicle to pass through and enter the bucket. After being pulled out, the ramp is limited by two end posts, increasing its stability.

[0021] 3. The present invention features detachable lifting rings at the four corners of the top end. The lifting rings are threadedly connected to the mounting block via a bottom mounting ring, and then limited by a pin inserted into the through groove, which further increases the stability of the lifting ring installation. It also facilitates the periodic disassembly and replacement of the lifting rings, increasing the safety of use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the protective door in the open state of the present invention.

[0024] Figure 3 This is a schematic diagram of the support plate structure of the present invention.

[0025] Figure 4 This is an exploded view of the side frame structure of the present invention.

[0026] Figure 5 This is a schematic diagram of the limit block and the slide bar.

[0027] Figure 6 Schematic diagram of the side frame.

[0028] Figure 7 Schematic diagram of the connecting cylinder.

[0029] Figure 8 This is a cross-sectional view of the lock frame of the present invention.

[0030] Figure 9 This is a schematic diagram of the lifting ring of the present invention.

[0031] Figure 10 This is an exploded view of the locking ring structure of the present invention.

[0032] Figure 11 This is a schematic diagram of the lock ring in the open state of the present invention.

[0033] The attached diagram is labeled as follows: 1. Frame; 11. Enclosure panel; 12. Lifting ring; 121. Slide groove; 13. Locking pin; 131. Slide button; 14. Mounting ring; 141. Through groove; 15. Mounting block; 16. Insert rod; 17. Knob; 18. Magnetic block; 2. Protective door; 21. Lock frame; 22. Locking buckle; 23. Handle; 24. Pressure rod; 25. Connecting block; 26. Locking pin; 27. Return spring; 3. Base plate; 31. Side frame; 32. Steel plate ramp; 33. Connecting cylinder; 34. Limiting block; 35. Slide rod; 36. Limiting cavity; 331. First protruding ridge; 341. Second protruding ridge; 351. First slide groove; 361. Second slide groove. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] according to Figure 1-5 The small transport vehicle hoisting bucket for secondary masonry shown includes a frame 1. The frame 1 is equipped with three side panels 11 and a protective door 2. One end of the protective door 2 is hinged to the outer surface of the frame 1. A locking component is provided on the outer surface of one end of the protective door 2. The protective door 2 is locked to the frame 1 through the locking component.

[0036] The base plate 3 is fixedly installed at the bottom of the frame 1. A storage groove is provided on one side of the interior of the base plate 3. A steel plate ramp 32 is provided inside the storage groove. A limiting component is provided at both ends of the steel plate ramp 32 to limit the movement of the steel plate ramp 32.

[0037] Furthermore, a side frame 31 is fixedly installed at one end of the base plate 3, and a connecting cylinder 33 is fixedly installed at one end of the steel plate ramp 32. The steel plate ramp 32 is rotatably connected to the side frame 31 through the connecting cylinder 33. The steel plate ramp 32 is lowered down along the side frame 31, making it convenient for small transport vehicles to enter the interior of the bucket through the steel plate ramp 32.

[0038] Furthermore, the limiting component includes a limiting block 34 disposed at one end of the connecting cylinder 33. A limiting cavity 36 matching one end of the limiting block 34 is opened on the outer surface of one end of the side frame 31. A sliding rod 35 is fixedly installed at one end of the limiting block 34, and the sliding rod 35 is slidably connected to the connecting cylinder 33. When the connecting cylinders 33 at both ends enter the side frame, the limiting block 34 at one end is pushed inward by the sliding rod 35, so that one end of the limiting block 34 is inserted into the limiting cavity 36 of the side frame 31.

[0039] The slide rod 35 is inserted into the connecting cylinder 33 for sliding connection. The slide rod 35 has two symmetrical first sliding grooves 351. Corresponding to the first sliding grooves, two first protruding ridges 331 are provided on the inner wall of the connecting cylinder 33. The extension length direction of the first protruding ridges and the first sliding grooves is parallel to the central axis of the connecting cylinder 33. Multiple second protruding ridges 341 are provided on the limiting block 34. The height of the multiple second protruding ridges is gradually differentiated. Corresponding to the second protruding ridges, multiple second sliding grooves 361 are provided in the limiting cavity 36.

[0040] Furthermore, the locking assembly includes a lock frame 21 fixedly installed on the outer surface of the protective door 2. A handle 23 is fixedly installed on the outer surface of the lock frame 21. When it is necessary to drive the small transport vehicle into the bucket, first press the upper pressure rod 24 inside the lock frame 21, and drive the locking pin 26 to disengage from the latch 22 through the connecting block 25, thereby releasing the restriction on the protective door 2, and then open the protective door 2.

[0041] Furthermore, a locking pin 26 is provided at the top of the locking frame 21, and a latch 22 matching the top of the locking pin 26 is fixedly installed on the outer surface of the frame 1. A pressure rod 24 is provided at the top of the locking frame 21 on one side of the locking pin 26. A connecting block 25 is integrally connected to the bottom end of the pressure rod 24, and one end of the connecting block 25 is fixedly connected to the outer surface of the locking pin 26. A return spring 27 is provided inside the locking frame 21 at the bottom end of the connecting block 25. When the protective door 2 is closed, the return spring 27 will push the locking pin 26 upward and insert it into the latch 22 for locking.

[0042] The specific implementation method is as follows: When it is necessary to drive a small transport vehicle into the bucket, first press the upper pressure rod 24 inside the locking frame 21, and drive the locking pin 26 to disengage from the latch 22 through the connecting block 25, thereby releasing the limit on the protective door 2. Then, open the protective door 2, and then pull the steel plate ramp 32 out from the bottom plate 3 through the connecting cylinder 33. When the connecting cylinders 33 at both ends enter the side frame, push the limiting block 34 at one end inward through the sliding rod 35, so that one end of the limiting block 34 is inserted into the limiting cavity 36 of the side frame 31. Then, lower the steel plate ramp 32 down along the side frame 31 to facilitate the small transport vehicle to enter the bucket through the steel plate ramp 32. After entering, retract the steel plate ramp 32 into the bottom plate 3, and then close the protective door 2. The return spring 27 will push the locking pin 26 upward and insert it into the latch 22 for locking.

[0043] according to Figure 6-8The diagram shows a lifting bucket for a small secondary masonry transport vehicle. Lifting rings 12 are installed at the four corners of the top of the frame 1. Mounting rings 14 are fixedly installed at the bottom of the lifting rings 12. Mounting blocks 15 are fixedly installed at the bottom of the mounting rings 14 at the top of the frame 1, and the mounting rings 14 and mounting blocks 15 are threaded together. Rotating the lifting rings 12 causes the mounting rings 14 at the bottom to detach from the mounting blocks 15, allowing the lifting rings 12 to be removed for replacement and maintenance.

[0044] Furthermore, both the mounting block 15 and the mounting ring 14 have through grooves 141 on their outer surfaces. A rod 16 is inserted into the through groove 141. One end of the rod 16 is threadedly connected to a knob 17. By using a tool to rotate the knob 17 at one end of the rod 16, the knob 17 is removed from one end of the rod 16. Then, the rod 16 is pushed out from the through groove 141 of the mounting ring 14 and the mounting block 15, thereby releasing the limitation of the mounting block 15 and the mounting ring 14.

[0045] Furthermore, an opening is provided on one side of the lifting ring 12, and a locking pin 13 is provided in the opening. A magnetic block 18 is embedded in the top of the inner wall of the opening. When the ring is connected to the tower crane after replacement, the locking pin 13 will be attracted by the magnetic force of the magnetic block 18 at one end to close the opening.

[0046] Furthermore, a groove 121 is provided on the outer surface of the lifting ring 12, and a sliding button 131 is provided on the outer surface of the groove 121. One end of the sliding button 131 passes through the groove 121 and is fixedly connected to the outer surface of the locking pin 13. First, slide the sliding button 131 along the groove 121 to drive the locking pin 13 to process the opening on one side of the lifting ring 12, so as to facilitate the disconnection of the lifting ring 12 from the tower crane.

[0047] The specific implementation method is as follows: The hoisting bucket is connected to the tower crane through the hoisting ring 12. When the hoisting ring 12 needs to be replaced or maintained, the sliding button 131 can be slid along the sliding groove 121 to drive the locking pin 13 to process the opening on one side of the hoisting ring 12, so as to facilitate the disconnection of the hoisting ring 12 from the tower crane. Then, use a tool to turn the knob 17 at one end of the insertion rod 16 to remove the knob 17 from one end of the insertion rod 16. Then, push the insertion rod 16 out of the through groove 141 between the mounting ring 14 and the mounting block 15 to release the limiting position of the mounting block 15 and the mounting ring 14. Then, turn the hoisting ring 12 to drive the mounting ring 14 at the bottom end to disengage from the mounting block 15. Remove the hoisting ring 12 for replacement and maintenance. After the replacement is completed, when connected to the tower crane, the locking pin 13 will be attracted by the magnetic force of the magnetic block 18 at one end to close the opening.

[0048] Working principle of this invention:

[0049] Refer to the instruction manual appendix Figure 1-5When a small transport vehicle needs to be driven into the bucket, first press the upper pressure rod 24 inside the locking frame 21. This will cause the locking pin 26 to disengage from the locking buckle 22 via the connecting block 25, releasing the limit on the protective door 2. Then, open the protective door 2. Next, pull the steel plate ramp 32 out from the bottom plate 3 via the connecting cylinder 33. When the connecting cylinders 33 at both ends enter the side frame, push the limiting block 34 at one end and its sliding rod 35 inward for the first time. This will cause the two first sliding grooves on the sliding rod 35 to advance along the two first protrusions set on the inner wall of the connecting cylinder 33. Then, rotate the steel plate ramp 32 according to the height of the material or the small transport vehicle to make the ramp... After the height and angle reach the ideal position, push the limiting block 34 and its sliding rod 35 again so that all the second protrusions on the limiting block 34 slide into the second sliding groove in the limiting cavity 36 of the side frame 31, thus locking the steel plate ramp 32 in the side frame 31. This makes it easier for small transport vehicles to enter the bucket through the steel plate ramp 32. Because the heights of the multiple second protrusions are different, multiple circumferentially distributed second protrusions can be simultaneously inserted into multiple circumferentially distributed second sliding grooves, ensuring the stability of the locking and the load-bearing strength of the insertion. This adjustment process allows the end of the steel plate ramp 32 to be grounded or suspended.

[0050] Refer to the instruction manual appendix Figure 6-8 The hoisting bucket is connected to the tower crane via the hoisting ring 12. When the hoisting ring 12 needs to be replaced or maintained, the sliding knob 131 can be slid along the slide groove 121 to open the opening on one side of the hoisting ring 12, making it easy to disconnect the hoisting ring 12 from the tower crane. Then, use a tool to turn the knob 17 at one end of the insert rod 16 to remove the knob 17 from one end of the insert rod 16. Then, push the insert rod 16 out of the through groove 141 between the mounting ring 14 and the mounting block 15 to release the limit of the mounting block 15 and the mounting ring 14. Then, turn the hoisting ring 12 to disengage the mounting ring 14 at the bottom from the mounting block 15 and remove the hoisting ring 12 for replacement or maintenance.

[0051] This invention utilizes a sliding rod inserted into a connecting cylinder for sliding connection. The sliding rod has two symmetrical first grooves, and corresponding to these first grooves, two first protruding ridges are provided on the inner wall of the connecting cylinder. The extension lengths of the first protruding ridges and the first grooves are parallel to the central axis of the connecting cylinder. Multiple second protruding ridges are provided on the limiting block, with varying heights. Corresponding to these second protruding ridges, multiple second grooves are provided within the limiting cavity. This design allows for reliable locking when material is pushed into the hopper via an inclined ramp, and enables adjustment of the angle and height of the inclined steel plate ramp to accommodate different material heights. This significantly improves adaptability to various scenarios, increases operational safety, and reduces the number of personnel required.

Claims

1. A hoisting bucket for a small transport vehicle used for secondary masonry work, characterized in that, include: The frame (1) has three side panels (11) and a protective door (2) installed around its interior. One end of the protective door (2) is hinged to the outer surface of the frame (1). A locking component is provided on the outer surface of one end of the protective door (2). The protective door (2) is locked to the frame (1) through the locking component. The base plate (3) is fixedly installed at the bottom of the frame (1). A storage groove is provided on one side of the interior of the base plate (3). A steel plate ramp (32) is provided inside the storage groove. A limiting component is provided at both ends of the steel plate ramp (32) to limit the steel plate ramp (32). A side frame (31) is fixedly installed at one end of the base plate (3), and a connecting cylinder (33) is fixedly installed at one end of the steel plate ramp (32). One end of the steel plate ramp (32) is rotatably connected to the side frame (31) through the connecting cylinder (33). The limiting assembly includes a cylindrical limiting block (34) disposed at one end of the connecting cylinder (33). A limiting cavity (36) matching one end of the limiting block (34) is opened on the outer surface of one end of the side frame (31). A sliding rod (35) is fixedly installed at one end of the limiting block (34). The sliding rod (35) is located in the connecting cylinder (31). 3) An internal sliding connection is inserted. Two symmetrical first sliding grooves (351) are provided on the body of the sliding rod (35). Corresponding to the first sliding groove, two first protruding ridges (331) are provided on the inner wall of the connecting cylinder (33). The extension length direction of the first protruding ridge and the first sliding groove is parallel to the central axis of the connecting cylinder (33). Multiple second protruding ridges (341) are provided on the limiting block (34). The height of the multiple second protruding ridges is gradually differentiated. Corresponding to the second protruding ridge, multiple second sliding grooves (361) are provided in the limiting cavity (36). The locking assembly includes a lock frame (21) fixedly installed on the outer surface of the protective door (2), and a handle (23) is fixedly installed on the outer surface of the lock frame (21).

2. The hoisting bucket for a small secondary masonry transport vehicle according to claim 1, characterized in that: The top of the lock frame (21) is provided with a locking pin (26), and the outer surface of the frame (1) is fixedly installed with a buckle (22) that matches the top of the locking pin (26).

3. The hoisting bucket for a small secondary masonry transport vehicle according to claim 2, characterized in that: The top of the lock frame (21) is provided with a pressure rod (24) on one side of the locking pin (26). The bottom end of the pressure rod (24) is integrally connected with a connecting block (25), and one end of the connecting block (25) is fixedly connected to the outer surface of the locking pin (26). The interior of the lock frame (21) is provided with a return spring (27) at the bottom end of the connecting block (25).

4. The hoisting bucket for a small secondary masonry transport vehicle according to claim 1, characterized in that: The top four corners of the frame (1) are equipped with lifting rings (12), and the bottom of the lifting rings (12) is fixedly equipped with mounting rings (14). The top of the frame (1) is located at the bottom of the mounting rings (14) and the mounting block (15) is fixedly installed, and the mounting rings (14) and the mounting block (15) are threadedly connected.

5. The hoisting bucket for a small secondary masonry transport vehicle according to claim 4, characterized in that: Both the mounting block (15) and the mounting ring (14) have through grooves (141) on their outer surfaces. A rod (16) is inserted into the through groove (141), and a knob (17) is threaded to one end of the rod (16).

6. The hoisting bucket for a small secondary masonry transport vehicle according to claim 5, characterized in that: An opening is provided on one side of the lifting ring (12), a locking pin (13) is provided in the opening, and a magnetic block (18) is embedded in the top of the inner wall of the opening.

7. The hoisting bucket for a small secondary masonry transport vehicle according to claim 6, characterized in that: The outer surface of the lifting ring (12) is provided with a groove (121), and a sliding button (131) is provided on the outer surface of the groove (121). One end of the sliding button (131) passes through the groove (121) and is fixedly connected to the outer surface of the locking pin (13).

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