Quick release mechanism applied to power-assisted tractor and use method thereof

Abstract

The present application relates to a kind of load transport vehicles, belong to load transport technical field, solve the problem of the existing load transport vehicles storage size is larger, inconvenient to carry.The present application includes chassis mechanism, quick release mechanism and connecting mechanism, the quick release mechanism is set on chassis mechanism;The one end of the connecting mechanism can be disassembled and assembled with chassis mechanism by quick release mechanism, the other end is connected with operating personnel;The connecting mechanism can be folded and locked at any position within limited angle.The present application connecting mechanism is disassembled and assembled with chassis mechanism by quick release mechanism, and the connecting mechanism can be folded and locked at any position within limited angle, realizes modular assembly and folding storage, can effectively reduce the storage size of the load transport vehicle is larger, to improve the convenience of carrying.

Description

Technical Field

[0001] This invention relates to the field of load transportation technology, and more particularly to a load transportation vehicle. Background Technology

[0002] Currently, firefighters and earthquake rescue personnel carry a large amount of heavy equipment during rescue operations. The primary mode of transportation is by manpower or assisted tow trucks. However, in unexpected situations or on difficult terrain, multiple personnel are required to carry the equipment, which not only hinders movement but also significantly depletes their physical strength. Therefore, the need for modular and portable assisted tow truck equipment has emerged.

[0003] Most current load transport vehicles are welded together as a whole, resulting in a large overall equipment size. During transportation, they require large solid boxes for transport, and multiple people are needed to unpack and unfold them before they can be used. This makes operation inconvenient and reduces the ease of use and transportability. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a load transport vehicle to solve the problem that existing load transport vehicles are large in size and inconvenient to carry.

[0005] The objective of this invention is mainly achieved through the following technical solutions:

[0006] A load transport vehicle includes a chassis mechanism, a quick-release mechanism, and a connecting mechanism. The quick-release mechanism is mounted on the chassis mechanism. One end of the connecting mechanism can be detached from the chassis mechanism via the quick-release mechanism, and the other end can be connected to the waist of the operator. The connecting mechanism can be folded and locked at any position within a limited angle.

[0007] Furthermore, the quick-release mechanism includes a fixing sleeve and a fastening device.

[0008] Furthermore, one end of the fixed sleeve is fixedly connected to the chassis mechanism, and the other end is used to insert the lower connecting tube in the connecting mechanism.

[0009] Furthermore, the fastening device is fitted onto the fixed sleeve to control the diameter change of the fixed sleeve.

[0010] Furthermore, the fastening device includes a clamping ring, a handle, and an adjusting bolt.

[0011] Furthermore, the clamping ring has an opening and can be fitted onto the fixing sleeve.

[0012] Furthermore, the adjusting bolt passes through the opening of the clamping ring, and the handle is rotatably connected to the adjusting bolt. The handle can be used to control the opening of the clamping ring to shrink, so that the diameter of the clamping ring becomes smaller.

[0013] Furthermore, the quick-release mechanism also includes a limiting pin, which is used to restrict the movement of the lower connecting tube in the connecting mechanism inserted into the fixed sleeve along the axis of the fixed sleeve.

[0014] Furthermore, the clamping ring is provided with a first limiting hole, the fixing sleeve is provided with a second limiting hole, and the lower connecting pipe is provided with a third limiting hole. The limiting pin can be inserted into the first limiting hole, the second limiting hole, and the third limiting hole in sequence.

[0015] Furthermore, the fastening device also includes an adjusting nut, which is mounted on the adjusting bolt and used to adjust the opening size of the clamping ring.

[0016] The technical solution of this invention can achieve at least one of the following effects:

[0017] (1) The present invention provides a load transport vehicle, including a chassis mechanism, a quick-release mechanism and a connecting mechanism. The quick-release mechanism is mounted on the chassis mechanism. One end of the connecting mechanism can be detached from the chassis mechanism via the quick-release mechanism, and the other end can be connected to the operator. The connecting mechanism can be folded and locked at any position within a limited angle. The present invention realizes modular assembly and folding storage, which can effectively reduce the large storage size of the load transport vehicle, thereby improving the convenience of carrying.

[0018] (2) The chassis mechanism of the present invention includes a main beam, the main beam including a main beam body and a wheel track adjustment device, the main beam body having a first mounting cavity symmetrically provided at both ends; the wheel track adjustment device is provided in two sets, respectively symmetrically installed in the first mounting cavity; the shock absorber is connected to the wheel track adjustment device, and the position of the shock absorber in the first mounting cavity is adjusted by the wheel track adjustment device, thereby adjusting the wheel track of the load transport vehicle, improving the stability and terrain adaptability of the load transport vehicle, and also improving the versatility of the load transport vehicle, expanding the application range and scenarios.

[0019] (3) The connecting mechanism in this invention includes a lower connecting tube, a folding device, and an upper connecting tube. The folding device includes a housing, a central shaft, an angle controller, a cable rewinder, and a U-shaped seat. One end of the lower connecting tube is detachably and fixedly connected to the main beam body, and the other end is fixedly connected to the housing. The U-shaped seat is mounted on the angle controller. One end of the upper connecting tube is fixedly connected to the U-shaped seat, and the other end is connected to the human body. The angle controller is fixedly mounted on the housing. The central shaft is rotatably connected to the angle controller. The cable rewinder is mounted on the angle controller and simultaneously connected to the central shaft. Rotating the central shaft enables the angle controller and the cable rewinder to unlock or lock synchronously. The angle controller can... The folding device allows for folding and locking at any position within a limited angle, thereby adjusting the angle between the lower and upper connecting pipes and simultaneously adjusting the center of gravity of the load transport vehicle. This adjusts the pressure exerted on the human body by the load transport vehicle, improving human-machine comfort and overall vehicle stability. Furthermore, while adjusting the angle, the folding device can also retract and extend the cable via a cable reel, ensuring the cable remains at the required length. This prevents excess cable from accumulating haphazardly within the folding device, thus preventing it from jamming the central shaft and affecting rotation, or breaking the cable during folding or unfolding, ultimately ensuring smooth folding or unfolding of the load transport vehicle.

[0020] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0021] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0022] Figure 1 This is a structural schematic diagram of the load transport vehicle in the folded state (i.e., the stowed state) according to an embodiment of the present invention;

[0023] Figure 2 This is a structural schematic diagram of the load transport vehicle in the deployed state (i.e., in use state) according to an embodiment of the present invention;

[0024] Figure 3 This is one of the structural schematic diagrams of the chassis mechanism according to an embodiment of the present invention;

[0025] Figure 4 This is a second schematic diagram of the chassis mechanism according to an embodiment of the present invention;

[0026] Figure 5 for Figure 4 Sectional view along line AA;

[0027] Figure 6 for Figure 5 Enlarged view of part B in the middle;

[0028] Figure 7 This is one of the structural schematic diagrams of the folding device according to an embodiment of the present invention;

[0029] Figure 8 This is a second schematic diagram of the folding device according to an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the mandrel structure in an embodiment of the present invention;

[0031] Figure 10 This is a cross-sectional view of the angle controller according to an embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of the structure of the fixing sleeve according to an embodiment of the present invention;

[0033] Figure 12 This is a schematic diagram of the angle control disk in an embodiment of the present invention;

[0034] Figure 13 This is a schematic diagram of the brake disc structure according to an embodiment of the present invention;

[0035] Figure 14 This is one of the structural schematic diagrams of the cable rewinder according to an embodiment of the present invention;

[0036] Figure 15 This is a second schematic diagram of the cable rewinder according to an embodiment of the present invention;

[0037] Figure 16 This is a structural schematic diagram of the quick-release mechanism according to an embodiment of the present invention.

[0038] Figure label:

[0039] 1. Chassis mechanism; 11. Main beam; 111. Main beam body; 1111. First mounting cavity; 112. Pressure plate; 1121. Locking pin; 113. Locking spring; 114. Adjusting sleeve; 1141. Locking hole; 1142. Second mounting cavity; 12. Shock absorber; 121. Bearing; 122. Shaft; 123. Shock absorber spring; 124. Limiting ring; 13. Traveling device; 131. Traveling wheel; 132. Drive motor; 133. Connecting arm; 14. Control box;

[0040] 2. Quick-release mechanism; 21. Fixing sleeve; 211. Expansion joint; 212. Second limiting hole; 22. Fastening device; 221. Clamping ring; 222. Handle; 223. Adjusting bolt; 224. Adjusting nut; 23. Limiting pin;

[0041] 3. Connecting mechanism; 31. Lower connecting tube; 32. Folding device; 321. Housing; 3211. Lead wire slot; 322. Central shaft; 3221. Drive pin; 323. Angle controller; 3231. Fixed sleeve; 32311. Guide groove; 3232. Angle control disc; 32321. First locking tooth; 3233. First return spring; 3234. Brake disc; 32341. Guide block; 32342, Second locking tooth; 32343, Spiral slide; 3235, Rotating sleeve; 3236, Tightening spring; 324, Cable rewinder; 3241, Drive disc; 3242, Swing arm; 3243, Linkage rod; 3244, Locking strip; 3245, Ratchet; 3246, Cable rewinding spool; 3247, Second return spring; 325, U-shaped seat; 326, Operating lever; 33, Upper connecting pipe. Detailed Implementation

[0042] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0043] One specific embodiment of the present invention discloses a load transport vehicle, such as... Figure 1 and Figure 2 As shown, the vehicle includes a chassis mechanism 1, a quick-release mechanism 2, and a connecting mechanism 3. The quick-release mechanism 2 is mounted on the chassis mechanism 1. One end of the connecting mechanism 3 can be quickly attached to and detached from the chassis mechanism 1 via the quick-release mechanism 2, while the other end connects to a back panel worn by the operator's waist, thus providing accompanying protection for the operator. The connecting mechanism 3 can be folded and locked at any position within a limited angle to adjust the center of gravity of the load transport vehicle, thereby adjusting the pressure of the load transport vehicle on the human body, improving human-machine comfort, and also improving the overall stability of the load transport vehicle. Compared with the prior art, in this embodiment, the connecting mechanism 3, through the quick-release mechanism 2 and the chassis mechanism 1, and the ability of the connecting mechanism 3 to be folded and locked at any position within a limited angle, achieves modular assembly and folding storage, effectively reducing the large storage size of the load transport vehicle, thereby improving portability.

[0044] Preferably, such as Figure 3As shown, the chassis mechanism 1 includes a main beam 11, shock absorbers 12, a traveling device 13, and a control box 14. The quick-release mechanism 2 is installed on the main beam 11. The control box 14 is fixedly installed on the main beam 11 and can be used as a load-bearing pallet. Two sets of shock absorbers 12 and two sets of traveling devices 13 are provided. The two sets of traveling devices 13 are respectively installed on the two sets of shock absorbers 12. The two sets of shock absorbers 12 are symmetrically installed at both ends of the main beam 11. The shock absorbers 12 can also move along the length of the main beam 11, thereby adjusting the wheelbase of the load transport vehicle according to the terrain conditions, thereby improving the stability and terrain adaptability of the load transport vehicle, and also improving the versatility of the load transport vehicle, expanding its application range and scenarios.

[0045] Preferably, such as Figure 4 As shown, the main beam 11 includes a main beam body 111 and a wheel track adjustment device. Two sets of the wheel track adjustment device are provided and symmetrically installed at both ends of the main beam body 111. The shock absorption device 12 is connected to the wheel track adjustment device. The length of the shock absorption device 12 extending out of the main beam body 111 is adjusted by the wheel track adjustment device, thereby adjusting the wheel track of the load transport vehicle, improving the stability and terrain adaptability of the load transport vehicle, and also improving the versatility of the load transport vehicle, expanding its application range and scenarios.

[0046] Preferably, such as Figure 5 and Figure 6As shown, the main beam body 111 has symmetrically provided first mounting cavities 1111 at both ends. The two first mounting cavities 1111 are respectively used to install two sets of wheel track adjustment devices. This embodiment takes one set of wheel track adjustment devices as an example for specific description. The wheel track adjustment device includes a pressure plate 112, a locking spring 113, and an adjusting sleeve 114. The pressure plate 112 is rotatably installed in the first mounting cavity 1111. The pressure plate 112 has a pressing end and a fixing end. One end of the locking spring 113 is fixedly installed in the first mounting cavity. Inside 1111, the other end is fixedly connected to the fixed end of the pressure plate 112. The locking spring 113 is in a compressed state and is used to apply an elastic thrust to the fixed end of the pressure plate 112. A locking pin 1121 is provided on the fixed end. The adjusting sleeve 114 is installed in the first mounting cavity 1111 and can slide in the first mounting cavity 1111 along the length direction of the main beam body 111. The adjusting sleeve 114 is provided with a locking hole 1141 and a second mounting cavity 1142. One end of the second mounting cavity 1142 is open, and the other end is open. The end is closed, thus forming an open end and a closed end. The second mounting cavity 1142 is used to install the shock absorber 12. Multiple locking holes 1141 are provided and are evenly spaced along the length of the adjusting sleeve 114. The locking pin 1121 can be inserted into the locking hole 1141 and, under the elastic thrust of the locking spring 113, presses the locking pin 1121 into the locking hole 1141 to lock the relative position of the adjusting sleeve 114 and the main beam body 111. In use, the pressing end in the pressure plate 112 is pressed. The locking pin 1121 at the fixed end of the pressure plate 112 is disengaged from the locking hole 1141, thereby releasing the locking between the adjusting sleeve 114 and the main beam body 111. After adjusting the position of the adjusting sleeve 114 on the main beam body 111, the pressing end is released, and the locking pin 1121 is locked in the locking hole 1141 under the elastic thrust of the locking spring 113, thus fixing the relative position of the adjusting sleeve 114 and the main beam body 111, thereby fixing the adjusting sleeve 114 at different positions on the main beam body 111, and thus realizing the rapid adjustment of the wheel track.

[0047] Preferably, the shock absorber 12 includes a shaft 122 and a shock absorber spring 123. The shaft 122 is rotatably mounted in the second mounting cavity 1142 and fixedly connected to one end of the shock absorber spring 123. The other end of the shock absorber spring 123 is fixedly connected to the closed end of the second mounting cavity 1142. The other end of the shaft 122 is connected to the traveling device 13. When the shaft 122 rotates relative to the adjusting sleeve 114, the shock absorber spring 123 can provide rotational damping force to reduce the vibration of the traveling device 13 and improve the stability of the load transport vehicle. Compared with the existing air suspension shock absorber or hydraulic shock absorber structure, the shock absorber 12 in this embodiment has the advantages of simple and reliable structure, convenient use, and low cost.

[0048] Preferably, the shock absorption device 12 further includes a bearing 121 and a limiting ring 124. The bearing 121 is fixedly installed at the open end of the second mounting cavity 1142, and the shaft 122 passes through the bearing 121, thereby allowing the shaft 122 to rotate relative to the adjusting sleeve 114. The limiting ring 124 is fixedly installed in the second mounting cavity 1142 and connected to the inner side of the bearing 121 to limit the axial movement of the bearing 121, thereby limiting the axial movement of the shaft 122.

[0049] Preferably, the bearing 121 is an angular contact ball bearing.

[0050] Preferably, the traveling device 13 includes a traveling wheel 131, a drive motor 132, and a connecting arm 133. One end of the connecting arm 133 is fixedly connected to the shaft 122 in the shock absorber 12, and the other end is connected to the drive motor 132. The traveling wheel 131 is mounted on the drive motor 132, and the drive motor 132 is used to drive the traveling wheel 131 to rotate, thereby providing assistance to the load transport vehicle and accompanying protection for the workers.

[0051] Preferably, the control box 14 includes a power supply and a controller. The power supply is used to provide electrical energy to the drive motor 132. The controller is connected to a sensor in the back panel worn by the worker's waist via a cable. It is used to receive the force changes between the worker and the load transport vehicle sensed by the force sensor in the back panel, and control the drive motor 132 to rotate according to the feedback information, thereby realizing the assistance of the load transport vehicle and the accompanying protection of the worker.

[0052] Preferably, the connecting mechanism 3 includes a lower connecting pipe 31, a folding device 32, and an upper connecting pipe 33. One end of the lower connecting pipe 31 is fixedly connected to the main beam body 111 via a quick-release mechanism 2, and the other end is connected to the folding device 32. One end of the upper connecting pipe 33 is connected to the folding device 32, and the other end is inserted into the back panel worn by the worker's waist. The folding device 32 can be folded and locked at any position within a limited angle, thereby adjusting the angle between the lower connecting pipe 31 and the upper connecting pipe 33, and simultaneously adjusting the center of gravity of the load transport vehicle, thereby achieving... Adjusting the pressure of the load transport vehicle on the human body improves human-machine comfort and also enhances the overall stability of the load transport vehicle. In addition, while adjusting the angle, the folding device 32 can also retract the cables of the load transport vehicle, ensuring that the cables are always at the required length. This prevents excess cable length from piling up haphazardly in the folding device 32, and prevents excess cable length from affecting rotation or causing the cables to break when adjusting the angle between the lower connecting pipe 31 and the upper connecting pipe 33, thereby avoiding affecting the folding or unfolding movement of the load transport vehicle.

[0053] Preferably, such as Figure 7 and Figure 8 As shown, the folding device 32 includes a housing 321, a central shaft 322, an angle controller 323, a cable reel 324, and a U-shaped base 325. The housing 321 is fixedly connected to the lower connecting pipe 31, the U-shaped base 325 is mounted on the angle controller 323, and the upper connecting pipe 33 is fixedly connected to the U-shaped base 325. The housing 321 is cylindrical, and two sets of angle controllers 323 are symmetrically fixedly mounted at both ends of the housing 321. The central shaft 322 passes through the two sets of angle controllers 323 and is rotatably connected to them. The cable... The cable retractor 324 is mounted on the angle controller 323 and is simultaneously connected to the central shaft 322. Rotating the central shaft 322 allows the angle controller 323 and the cable retractor 324 to unlock or lock synchronously. The angle controller 323 allows the folding device 32 to be folded and locked at any position within a limited angle. The cable retractor 324 can retract and extend the cable, ensuring that the cable is always at the required length. This prevents excess cable length from piling up messily in the folding device 32 and prevents excess cable length from jamming the central shaft 322 and affecting rotation or being broken by the central shaft 322 during folding or unfolding.

[0054] Preferably, the housing 321 is provided with a lead wire slot 3211, which extends along the circumference of the housing 321 and is used to introduce excess cable length from the outside into the housing 321.

[0055] Preferably, such as Figure 9 As shown, drive pins 3221 are provided at both ends of the central shaft 322; the central shaft 322 is preferably square. Compared with a cylindrical shaft, a square shaft can better connect with other components, prevent slippage when the central shaft 322 drives other components to rotate, and can better transmit motion.

[0056] Preferably, such as Figure 10As shown, the angle controller 323 includes a fixed sleeve 3231, an angle control disc 3232, a first return spring 3233, and a brake disc 3234. The fixed sleeve 3231 is fixedly installed at the end of the housing 321. The brake disc 3234 and the angle control disc 3232 are installed inside the fixed sleeve 3231. The angle control disc 3232 can rotate circumferentially within the fixed sleeve 3231, and the brake disc 3234 can slide along the axis of the fixed sleeve 3231. Both the brake disc 3234 and the angle control disc 3232 are connected to a central shaft 322. The brake disc 3234 can lock or unlock the angle control disc 3232 according to the rotation of the central shaft 322. The angle control disc 3232 is fixedly connected to a U-shaped seat 325. The first return spring 3233 is fixedly connected at one end to the central shaft 322 and at the other end to the fixed sleeve 3231. The first return spring 3233 is used to drive the central shaft 322 to rotate and return to the initial state when the external torque is removed, and at the same time push the brake disc 3234 to slide towards the angle control disc 3232, thereby realizing the automatic locking of the brake disc 3234 to the angle control disc 3232. The brake disc 3234 can be unlocked by rotating the central shaft 322, and the brake disc 3234 can be automatically locked to the angle control disc 3232 by the first return spring 3233. The operation is convenient and the connecting mechanism 3 can be folded and locked at any position within a limited angle.

[0057] Preferably, such as Figure 11 As shown, the fixed sleeve 3231 has an open end and a closed end, forming an open end and a closed end; the closed end is provided with a first shaft hole, and a rotating sleeve 3235 is rotatably installed in the first shaft hole, and the rotating sleeve 3235 is fixedly installed on the central shaft 322, so that the central shaft 322 is rotatably connected to the fixed sleeve 3231 through the rotating sleeve 3235; the inner wall of the fixed sleeve 3231 is provided with a guide groove 32311, and the guide groove 32311 extends along the axial direction of the fixed sleeve 3231; in this embodiment, four guide grooves 32311 are preferably provided, and the four guide grooves 32311 are evenly distributed around the circumference of the cylinder wall of the fixed sleeve 3231.

[0058] Preferably, such as Figure 12 As shown, the angle control disk 3232 is provided with a first locking tooth 32321; the angle control disk 3232 is also provided with a second shaft hole, in which a rotating sleeve 3235 is rotatably installed, and the rotating sleeve 3235 is fixedly installed on the central shaft 322, so that the angle control disk 3232 is rotatably connected to the central shaft 322 through the rotating sleeve 3235.

[0059] Preferably, the brake disc 3234 is mounted on the central shaft 322 and is slidably connected to the central shaft 322. By rotating the central shaft 322, the brake disc 3234 can be pushed to slide along its axial direction within the fixed sleeve 3231, thereby enabling the brake disc 3234 to lock or unlock the angle control disc 3232.

[0060] Preferably, such as Figure 13 As shown, the brake disc 3234 includes a guide block 32341, a second locking tooth 32342, and a third shaft hole. The second locking tooth 32342 is disposed on the end face of the brake disc 3234 and corresponds to the first locking tooth 32321, and can engage with the first locking tooth 32321. Through the engagement and disengagement of the second locking tooth 32342 and the first locking tooth 32321, the brake disc 3234 can lock or unlock the angle control disc 3232. The guide block 32341 is disposed on the outer circumference of the brake disc 3234 and corresponds to the guide groove 32311. The guide block 32341 can slide within the guide groove 32311 to restrict the circumferential rotation of the brake disc 3234, so that the brake disc 3234... 234 can only slide in the axial direction of the fixed sleeve 3231; the third shaft hole is used to pass through the central shaft 322; the inner wall of the third shaft hole is provided with a spiral slide 32343, the drive pin 3221 on the central shaft 322 is inserted into the spiral slide 32343 and can slide in the spiral slide 32343, thereby rotating the central shaft 322 and sliding it in the spiral slide 32343 through the drive pin 3221, which can push the brake disc 3234 to slide along its axis in the fixed sleeve 3231, so that the second locking tooth 32342 can engage or disengage with the first locking tooth 32321, thereby realizing the brake disc 3234 locking or unlocking the angle control disc 3232. Its mechanism is simple and easy to operate, and the connecting mechanism 3 can be quickly folded or unfolded.

[0061] Preferably, the spiral slide 32343 is provided with retaining rings at both ends, which are used to limit the sliding stroke of the drive pin 3221 in the spiral slide 32343; in this embodiment, the rotation angle of the central shaft 322 is preferably 90°, that is, when the central shaft 322 rotates 90°, it can push the second locking tooth 32342 in the brake disc 3234 to fully engage or disengage from the first locking tooth 32321.

[0062] Preferably, the cross-sectional shape of the spiral slide 32343 is semi-circular; the end of the drive pin 3221 is preferably hemispherical, which allows the end of the drive pin 3221 to better fit with the spiral slide 32343, making the sliding of the drive pin 3221 within the spiral slide 32343 smoother, thereby enabling the central shaft 322 to more smoothly push the brake disc 3234 to slide along the axial direction of the fixed sleeve 3231 when rotating; in this embodiment, four spiral slides 32343 are preferably provided. 3. The drive pins 3221 are evenly distributed along the inner circumference of the third shaft hole; four drive pins 3221 are provided on each end of the central shaft 322. The four drive pins 3221 are symmetrically arranged on the four surfaces of the central shaft 322 and are correspondingly arranged with the four spiral slides 32343. The four drive pins 3221 and the four spiral slides 32343 cooperate to make the central shaft 322 uniformly stressed when pushing the brake disc 3234 to slide along the axial direction of the fixed sleeve 3231, thereby improving the smoothness of the central shaft 322 pushing the brake disc 3234 to slide.

[0063] Preferably, four guide blocks 32341 are provided, and the four guide blocks 32341 are evenly distributed in the circumferential direction, so that the four guide blocks 32341 correspond to the four guide grooves 32311 on the inner wall of the fixed sleeve 3231, so that the guide blocks 32341 can be inserted into the guide grooves 32311 and can slide within the guide grooves 32311; the cooperation between the four guide blocks 32341 and the four guide grooves 32311 can make the brake disc 3234 slide along the axial direction of the fixed sleeve 3231 with uniform force, thereby improving the smoothness of the brake disc 3234 sliding within the fixed sleeve 3231.

[0064] Preferably, the angle controller 323 further includes a tensioning spring 3236, one end of which is fixedly connected to the closed end of the fixed sleeve 3231, and the other end is fixedly connected to the brake disc 3234. The tensioning spring 3236 is always in a compressed state, that is, the tensioning spring 3236 always applies an elastic force to the brake disc 3234, so that the second locking tooth 32342 in the brake disc 3234 and the first locking tooth 32321 in the angle control disc 3232 are more tightly engaged, preventing the second locking tooth 32342 from loosening when engaged with the first locking tooth 32321.

[0065] Preferably, such as Figure 14 and Figure 15As shown, the cable reel 324 includes a locking assembly, a ratchet 3245, a winding spool 3246, and a second return spring 3247. The locking assembly is used to lock or unlock the ratchet 3245 according to the rotation of the central shaft 322. The ratchet 3245 is rotatably mounted on the closed end of the fixing sleeve 3231 in the angle controller 323. The winding spool 3246 is fixedly mounted at the center of the end face of the ratchet 3245, and is used to reel in or release the cable according to the rotation of the ratchet 3245. The second return spring 3247 is fixedly mounted on the other end face of the ratchet 3245. One end is fixedly connected to the ratchet 3245, and the other end is fixedly connected to the closed end of the fixed sleeve 3231. The second return spring 3247 is used to drive the ratchet 3245 to rotate, thereby driving the winding shaft 3246 to rotate to realize the automatic storage of excess cable length. This allows the connecting mechanism 3 to adjust the length of the cable while folding or unfolding, so that the cable is always at the required length. This can prevent excess cable length from piling up messily in the connecting mechanism 3, and prevent excess cable length from getting stuck on the central shaft 322 and affecting rotation or being broken by the central shaft 322 when the load transport vehicle is folded or unfolded, thereby avoiding affecting the folding or unfolding movement of the load transport vehicle.

[0066] Preferably, the locking assembly includes a drive disc 3241, a swing arm 3242, a linkage rod 3243, and a locking strip 3244. The drive disc 3241 is sleeved on and fixedly connected to the central shaft 322, and can rotate with the rotation of the central shaft 322. One end of the swing arm 3242 is hinged to the edge of the drive disc 3241, and the other end is hinged to one end of the linkage rod 3243. The middle part of the linkage rod 3243 is hinged to the closed end of the fixed sleeve 3231 via a pin, and its other end is hinged to one end of the locking strip 3244. The other end of the locking strip 3244 is mounted on the closed end of the fixed sleeve 3231 and is connected to the locking strip 3244 via a pin. The locking bar 3244 is hinged to the fixed sleeve 3231 via a pin. The locking bar 3244 has ratchet teeth that engage with the ratchet wheel 3245. By turning the operating lever 326, the central shaft 322 rotates, which in turn drives the drive disc 3241 to rotate. The rotation of the drive disc 3241 drives the swing arm 3242 to rotate, which in turn drives the linkage rod 3243 to rotate around the pin located in the middle of the linkage rod 3243. This further drives the locking bar 3244 to rotate around the pin connected to the fixed sleeve 3231, causing the ratchet teeth on the locking bar 3244 to engage or disengage from the ratchet wheel 3245, thereby locking or unlocking the ratchet wheel 3245.

[0067] Preferably, the spool 3246 is used to wind and store cables; the cable entering the housing 321 is folded in half, the folded end of the cable is fixed on the spool 3246, and then the excess cable is wound and stored on the spool 3246.

[0068] Preferably, the first return spring 3233 and the second return spring 3247 are both coil springs.

[0069] Preferably, the connecting mechanism 3 further includes a control lever 326. Two control levers 326 are provided and are fixedly connected to both ends of the central shaft 322 respectively. By turning the control lever 326, the central shaft 322 is rotated, thereby driving the angle controller 323 and the cable rewinder 324 to unlock or lock simultaneously, so as to realize the adjustment of the folding angle while winding and unwinding the cable.

[0070] Preferably, both the lower connecting pipe 31 and the upper connecting pipe 33 are hollow pipes. Hollow pipes can not only allow wiring to run in the middle, but also reduce the weight of the load transport vehicle. Both the lower connecting pipe 31 and the upper connecting pipe 33 have a certain curvature, which can enhance the load-bearing strength of the lower connecting pipe 31 and the upper connecting pipe 33, thereby improving the load capacity of the load transport vehicle.

[0071] Preferably, such as Figure 16 As shown, the quick-release mechanism 2 includes a fixed sleeve 21 and a fastening device 22. One end of the fixed sleeve 21 is fixedly connected to the main beam body 111, and the other end can be inserted into the lower connecting pipe 31. The fastening device 22 is sleeved on the fixed sleeve 21 and is used to control the diameter change of the fixed sleeve 21, thereby quickly locking or unlocking the lower connecting pipe 31 inserted into the fixed sleeve 21, so that the lower connecting pipe 31 can be quickly connected or disconnected from the chassis mechanism 1, which is convenient and quick to use.

[0072] Preferably, the fixed sleeve 21 is provided with a deformation joint 211, which extends along the axial direction of the fixed sleeve 21.

[0073] Preferably, the fastening device 22 includes a clamping ring 221, a handle 222, and an adjusting bolt 223. The clamping ring 221 can be fitted onto the fixed sleeve 21. The clamping ring 221 has an opening, and the adjusting bolt 223 passes through the opening of the clamping ring 221. The handle 222 is rotatably connected to the adjusting bolt 223. By turning the handle 222, the opening of the clamping ring 221 can be controlled to shrink, so that the diameter of the clamping ring 221 becomes smaller, thereby further controlling the diameter of the fixed sleeve 21 to become smaller, thereby quickly locking and fixing the lower connecting pipe 31 inserted into the fixed sleeve 21, so that the lower connecting pipe 31 can be quickly connected or disconnected from the chassis mechanism 1, which is convenient and quick to use.

[0074] Preferably, the fastening device 22 further includes an adjusting nut 224, which is mounted on the adjusting bolt 223 and is used to adjust the opening size of the clamping ring 221, thereby enabling the fastening device 22 to quickly lock and fix the lower connecting pipes 31 of different diameters inserted into the fixing sleeve 21.

[0075] Preferably, the quick-release mechanism 2 further includes a limiting pin 23, which is used to restrict the movement of the lower connecting pipe 31 inserted into the fixed sleeve 21 along the axis of the fixed sleeve 21, so as to further prevent the lower connecting pipe 31 from coming out of the fixed sleeve 21 and improve the reliability of the connection.

[0076] Preferably, the clamping ring 221 is further provided with a first limiting hole, the fixed sleeve 21 is further provided with a second limiting hole 212, and the lower connecting pipe 31 is provided with a third limiting hole. When the lower connecting pipe 31 is inserted into the fixed sleeve 21 and the first limiting hole, the second limiting hole 212 and the third limiting hole are aligned, the limiting pin 23 is inserted to restrict the lower connecting pipe 31 inserted into the fixed sleeve 21 from moving along the axis of the fixed sleeve 21, so as to prevent the lower connecting pipe 31 from coming out of the fixed sleeve 21.

[0077] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A load-carrying vehicle, characterized in that, It includes a chassis mechanism (1), a quick-release mechanism (2) and a connecting mechanism (3). The quick-release mechanism (2) is mounted on the chassis mechanism (1). One end of the connecting mechanism (3) can be detached from the chassis mechanism (1) through the quick-release mechanism (2), and the other end can be connected to the waist of the operator. The connecting mechanism (3) can be folded and locked at any position within a limited angle.

2. A load transport vehicle according to claim 1, characterized in that, The quick-release mechanism (2) includes a fixed sleeve (21) and a fastening device (22).

3. A load transport vehicle according to claim 2, characterized in that, One end of the fixed sleeve (21) is fixedly connected to the chassis mechanism (1), and the other end is used to insert into the lower connecting tube (31) in the connecting mechanism (3).

4. A load transport vehicle according to claim 3, characterized in that, The fastening device (22) is sleeved on the fixed sleeve (21) and is used to control the diameter change of the fixed sleeve (21).

5. A load transport vehicle according to claim 4, characterized in that, The fastening device (22) includes a clamping ring (221), a handle (222), and an adjusting bolt (223).

6. A load transport vehicle according to claim 5, characterized in that, The clamping ring (221) has an opening and can be fitted onto the fixed sleeve (21).

7. A load transport vehicle according to claim 6, characterized in that, The adjusting bolt (223) passes through the opening of the clamping ring (221), and the handle (222) is rotatably connected to the adjusting bolt (223). The handle (222) can control the opening of the clamping ring (221) to shrink so that the diameter of the clamping ring (221) becomes smaller.

8. A load transport vehicle according to claim 7, characterized in that, The quick-release mechanism (2) also includes a limiting pin (23), which is used to restrict the movement of the lower connecting tube (31) in the connecting mechanism (3) inserted into the fixed sleeve (21) along the axis of the fixed sleeve (21).

9. A load transport vehicle according to claim 8, characterized in that, The clamping ring (221) is also provided with a first limiting hole, the fixed sleeve (21) is also provided with a second limiting hole (212), the lower connecting pipe (31) is provided with a third limiting hole, and the limiting pin (23) can be inserted into the first limiting hole, the second limiting hole (212) and the third limiting hole in sequence.

10. A load transport vehicle according to claim 9, characterized in that, The fastening device (22) also includes an adjusting nut (224), which is mounted on the adjusting bolt (223) and is used to adjust the opening size of the clamping ring (221).

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