A hand trailer

Abstract

The present application provides a kind of manual trailer, and the manual trailer includes: chassis, handle, sliding bracket and locking assembly;Sliding bracket is set in chassis, and sliding bracket is provided with locking hole;Locking assembly includes lock seat, lock pin and elastic piece, lock seat is fixedly arranged on chassis, and elastic piece is installed between lock pin and lock seat, under the joint action of sliding bracket, elastic piece and lock seat, lock pin has the tendency of ejecting towards the direction of sliding bracket;Handle is drivingly connected with sliding bracket, and handle can drive sliding bracket to lift relative to chassis;When sliding bracket is lifted to locking hole and lock pin is directly opposite, lock pin is popped into locking hole to lock sliding bracket at set height.By the present application, the technical problem that the existing tow tool operation is complex is alleviated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of warehouse logistics, in particular to a manual tow truck. BACKGROUND

[0002] The latent AGV refers to an AGV whose body height can be produced in a limited environment and can freely shuttle in a limited gap environment. Due to its delicate and flexible characteristics, it is widely used in warehouse logistics and other environments, becoming a latent warehouse robot. During the working process of the latent warehouse robot, sometimes it will stop under the shelf due to battery failure or drive motor reducer failure. At this time, the latent warehouse robot needs to be moved out from under the shelf. Since the drive motor of the latent warehouse robot is locked, it is very laborious to tow the faulty robot.

[0003] The current market for handling faulty robots uses a lever principle to pry the end of the robot with a tow tool, and then the operator needs to press down the handle of the tow tool while towing the faulty robot to keep the drive wheel of the faulty robot off the ground. This tow tool requires the operator to not only pull forward with force, but also press down the handle with force, which is laborious. Moreover, if the operation is not proper, the end of the handle will be tilted upwards, which will hurt the operator. SUMMARY

[0004] The purpose of the present application is to provide a manual tow truck to alleviate the technical problem of complex operation of the existing tow tool.

[0005] The present application provides a manual tow truck, comprising a chassis, a handle, a sliding bracket and a locking assembly; the sliding bracket is arranged on the chassis, and the sliding bracket is provided with a locking hole; the locking assembly comprises a lock seat, a lock pin and an elastic member, the lock seat is fixedly arranged on the chassis, the elastic member is installed between the lock pin and the lock seat, and under the action of the sliding bracket, the lock pin always has a tendency to pop out towards the sliding bracket; the handle is hingedly connected with the chassis and is in transmission connection with the sliding bracket, and the handle can rotate around the axis of the hinge shaft to lift the sliding bracket relative to the chassis; when the sliding bracket is lifted to the position where the locking hole and the lock pin are opposite, the lock pin is popped into the locking hole to lock the sliding bracket at a set height.

[0006] Further, the locking assembly further comprises a lock cavity opened in the lock seat, and the lock pin is installed in the lock cavity.

[0007] Further, the elastic member is a spring sleeved outside the lock pin.

[0008] Further, the manual trailer comprises a left guide seat and a right guide seat, both of which are fixed on the chassis and are provided with sliding grooves for the sliding bracket to slide up and down, the sliding bracket is arranged between the left guide seat and the right guide seat and is in sliding connection with the corresponding sliding groove.

[0009] Further, the two sides of the sliding bracket are respectively provided with cam bearings, and the sliding bracket is in sliding connection with the corresponding sliding groove through the cam bearings on the two sides.

[0010] Further, the sliding groove provided in the left guide seat and the sliding groove provided in the right guide seat are both through grooves.

[0011] Further, the sliding bracket is Z-shaped and comprises a drag plate, a side plate and a top plate which are fixedly connected in sequence, the drag plate is provided with a pin for limiting the dragged object, and the drag plate is used for dragging the object; the side plate is provided with a locking hole, and the top plate is in transmission connection with the handle.

[0012] Further, the manual trailer further comprises a connecting rod assembly, the handle is in transmission connection with the sliding bracket through the connecting rod assembly; the connecting rod assembly comprises a lever seat and a lever, the lever seat is fixed on the chassis, one end of the lever is in transmission connection with the sliding bracket, and the other end of the lever is in transmission connection with the handle.

[0013] Further, the connecting rod assembly further comprises a connecting rod, one end of the connecting rod is hinged to the other end of the lever, and the other end of the connecting rod is in transmission connection with the handle.

[0014] Further, one end of the lever is provided with a roller, and the lever is in transmission connection with the sliding bracket through the roller.

[0015] Further, the manual trailer further comprises a left guide seat and a right guide seat, both of which are fixed on the chassis and are provided with sliding grooves for the sliding bracket to slide up and down; the sliding bracket is arranged between the left guide seat and the right guide seat, and the two sides of the sliding bracket are respectively provided with cam bearings, and the sliding bracket is in sliding connection with the corresponding sliding groove through the cam bearings on the two sides.

[0016] Further, when the handle is pressed downward, the handle drives the end in transmission connection with the handle of the lever to move downward, and the end in transmission connection with the sliding bracket of the lever drives the sliding bracket to slide upward along the left guide seat and the right guide seat.

[0017] Further, the manual trailer further comprises a lock handle and a lock wire, the lock handle is installed on the operation end of the handle, and the lock handle and the lock pin are connected through the lock wire.

[0018] Further, when the lock handle is pulled, the lock handle drives the lock wire to pull the lock pin out of the locking hole.

[0019] Further, the chassis is fixed with a support, and the connecting end of the handle is hinged to the support.

[0020] Further, the bottom plate is provided with a roller seat near one end of the sliding support, and a roller is installed below the roller seat; a universal wheel is installed at the lower part of the bottom plate near the other end of the handle

[0021] The application provides a kind of manual trailer, including: chassis, handle, sliding support and locking assembly;Sliding support is set in chassis, and sliding support is provided with locking hole;Locking assembly includes lock seat, lock pin and elastic piece, lock seat is fixedly arranged on chassis, and elastic piece is installed between lock pin and lock seat, under the action of sliding support, lock pin always has the tendency of ejecting towards sliding support direction;Handle is drivingly connected with sliding support, and handle can drive sliding support to lift relative to chassis;When sliding support is lifted to locking hole and lock pin are opposite, lock pin is popped into locking hole to lock sliding support at set height.

[0022] When the latent warehousing robot fails and stops under the shelf, the body of the manual trailer moves to the lower side of the latent warehousing robot under the shelf, and the handle of the manual trailer remains outside the shelf;Press the handle, and the handle drives the sliding support to lift, and the sliding support gives the latent robot an upward force to make the main drive wheel of the latent robot leave the ground;When the sliding support is lifted to the locking hole and the lock pin are opposite, the lock pin is popped into the locking hole to lock the sliding support at the set height, so that the main drive wheel of the latent robot remains in the off-ground posture. At this time, pull the handle to pull out the latent robot by moving the whole manual trailer. By using the manual trailer provided by the application, the operator does not need to pull forward and press the handle downward, and the operation is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0024] Figure 1 The schematic view of the manual trailer provided by the embodiment of the present application when inserted under the AGV chassis is shown in the figure;

[0025] Figure 2 The schematic view of the manual trailer provided by the embodiment of the present application when supporting the AGV is shown in the figure

[0026] Figure 3 The schematic view of the manual trailer provided by the embodiment of the present application is shown in the figure;

[0027] Figure 4 The front view of the manual trailer provided by the embodiment of the present application is shown in the figure;

[0028] Figure 5 The side view of the manual trailer provided by the embodiment of the present application;

[0029] Figure 6 The rear view of the manual trailer provided by the embodiment of the present application;

[0030] Figure 7 The top view of the manual trailer provided by the embodiment of the present application;

[0031] Figure 8 The first sectional view of the manual trailer provided by the embodiment of the present application;

[0032] Figure 9 The second sectional view of the manual trailer provided by the embodiment of the present application;

[0033] Figure 10 The front end sectional view of the manual trailer provided by the embodiment of the present application;

[0034] Figure 11 The structural schematic view of the sliding support provided by the embodiment of the present application;

[0035] Figure 12 The structural schematic view of the left guide seat (right guide seat) provided by the embodiment of the present application;

[0036] Figure 13 The structural schematic view of the chassis provided by the embodiment of the present application;

[0037] Figure 14 The structural schematic view of the cam bearing provided by the embodiment of the present application.

[0038] Legend:

[0039] 1-AGV; 2-manual trailer;

[0040] 211-roller; 212-roller seat; 213-chassis; 214-universal wheel;

[0041] 221-sliding support; 222-cam bearing; 223-pin; 2211-drag plate; 2212-side plate; 2213-top plate; 224-locking hole;

[0042] 231-left guide seat; 232-right guide seat; 233-sliding groove;

[0043] 241-lock seat; 242-lock pin; 243-spring;

[0044] 251-cam; 252-lever; 253-lever seat; 254-link; 255-second pin shaft; 256-third pin shaft; 257-fourth pin shaft;

[0045] 261 - handle; 262 - handle; 263 - lock handle; 264 - lock wire; 265 - support; 266 - first pin shaft. DETAILED DESCRIPTION

[0046] The technical solutions of the present application will be described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0047] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] The specific embodiments of the present application will be described in detail below in conjunction with the drawings. It should be understood that the specific embodiments described here are only for the purpose of illustration and explanation of the present application, and are not intended to limit the present application.

[0050] When the latent warehouse robot is working, it often needs to shuttle between the warehouse shelves. Sometimes due to battery failure or drive motor reducer failure, the latent warehouse robot will stop under the shelf. Due to the drive motor brake seizure, it is very laborious to drag the faulty robot from under the shelf to the repair place. The drag tool for handling the faulty robot on the current market generally uses the lever principle of crowbar, first uses the drag tool to pry up the end of the robot, and then the operator drags the faulty robot while also pressing down the handle of the drag tool to keep the drive wheel of the faulty robot off the ground. This drag tool requires the operator to not only drag forward with force, but also press down the handle with force, which is quite laborious; and if not handled properly, the end of the handle will also be tilted upwards, hurting the operator.

[0051] The inventor has developed a manual tow truck. When towing a faulty robot, there is no need to press down the handle while dragging the faulty robot forward. The operation is simple and convenient.

[0052] The embodiment of the present invention provides a manual trailer, such as Figures 3-10 As shown, it includes: a chassis 213, a handle 262, a sliding bracket 221 and a locking assembly; the sliding bracket 221 is provided on the chassis 213, and the sliding bracket 221 is provided with a locking hole 224 (such as Figure 11 The locking assembly includes a lock base 241, a lock pin 242, and an elastic member. The lock base 241 is fixed to the chassis 213, and the elastic member is installed between the lock pin 242 and the lock base 241. Under the joint action of the sliding bracket 221, the elastic member, and the lock base 241, the lock pin 242 has a tendency to pop out toward the sliding bracket 221. The handle 262 is transmission-connected to the sliding bracket 221, and the handle 262 can drive the sliding bracket 221 to lift relative to the chassis 213. When the sliding bracket 221 is lifted until the locking hole 224 is aligned with the lock pin 242, the lock pin 242 pops into the locking hole 224 to lock the sliding bracket 221 at a set height.

[0053] When the latent storage robot breaks down and stops under the shelf, the body of the manual trailer enters the shelf and moves under the latent storage robot, and the handle 262 of the manual trailer remains outside the shelf; pressing the handle 262, the handle 262 drives the sliding bracket 221 to lift, and the sliding bracket 221 will give the latent robot an upward force to make the main drive wheel of the latent robot leave the ground; when the sliding bracket 221 is lifted to the locking hole 224 and the locking pin 242 are aligned, the locking pin 242 springs into the locking hole 224 to lock the sliding bracket 221 at a set height to keep the main drive wheel of the latent robot off the ground. At this time, pull the handle 262, and the latent robot is pulled out by the overall movement of the manual trailer. The manual trailer provided by the embodiment of the present invention does not require the operator to both drag forward with force and press the handle down with force, making operation more convenient.

[0054] Specifically, the locking assembly includes a lock seat 241, a lock pin 242 and an elastic member. The lock seat 241 is fixed on the chassis 213, and the lock pin 241 has a lock cavity. Figure 9The lock cavity can be a through hole facing the sliding bracket 221, or a sliding groove facing the sliding bracket 221, and the lock pin 242 is inserted or mounted in the lock cavity (the lock pin 242 can be inserted or ejected from the lock cavity, but cannot move up and down relative to the lock seat 241). In this embodiment, the lock cavity is a through hole facing the sliding bracket 221. The elastic member can be a spring or a spring, and in this embodiment, the elastic member is a spring 243 sleeved outside the lock pin 242.

[0055] The inner wall of the lock cavity is provided with a first protrusion, the outer wall of the lock pin 242 is provided with a second protrusion, the spring 243 is sleeved outside the lock pin 242 from the rear end of the lock pin 242, and one end of the spring 243 is in contact with the second protrusion; then the spring 243 and the lock pin 242 are inserted into the lock cavity together until the other end of the spring is in contact with the first protrusion. At this time, the spring 243 is in a natural state. Install the sliding bracket 221, and the side plate of the sliding bracket 221 abuts against the lock pin 242, and at this time the spring 243 is in a compressed state and has a tendency to pop out towards the sliding bracket 221.

[0056] It should be noted that the position of the chassis 213 is in front, the position of the handle 262 is in back, and the direction from the chassis 213 to the handle 262 is from front to back.

[0057] It should be noted that the first protrusion can be a ring-shaped protrusion provided on the inner wall of the lock cavity, or a plurality of block-shaped protrusions provided on the inner wall of the lock cavity. The second protrusion can be a ring-shaped protrusion provided on the outer wall of the lock pin, or a plurality of block-shaped protrusions provided on the outer wall of the lock pin.

[0058] In order to increase the force of the spring 243 when the lock pin 242 is ejected, the distance between the sliding bracket 221 and the first protrusion is less than the length of the spring 243 in a natural state.

[0059] The manual trailer includes a sliding bracket assembly, and the sliding bracket assembly includes a sliding bracket 221, a cam bearing 222, and a pin 223. As shown in Figure 11 The sliding bracket 221 is Z-shaped and includes a drag plate 2211, a side plate 2212, and a top plate 2213 fixedly connected at the head and tail, the drag plate 2211 is provided with a pin 223 for limiting the dragged object, and the drag plate 2211 is used for dragging the object; the side plate 2212 is provided with a locking hole 224, and the top plate 2213 is in transmission connection with the handle 262. It should be noted that Figure 5 is a side view, and the top plate is blocked by the guide seat. Meanwhile, in order to be beautiful and increase the strength, a reinforcing plate can be arranged between the side plate and the drag plate.

[0060] Specifically, the carriage 2211 is positioned approximately horizontally and is used to contact the chassis of the malfunctioning robot, lift one side of the malfunctioning robot, and lift the robot's main drive wheels off the ground, thereby dragging the malfunctioning robot. When the malfunctioning robot's side is lifted by the carriage 2211, the malfunctioning robot is tilted. Because the malfunctioning robot is heavy and partially on the ground, its own weight gradually causes it to separate from the carriage 2211 as it is dragged. To alleviate this problem, a plurality of pins 223 are provided on the front upper surface of the carriage 2211. The pins 223 align with and engage with grooves on the underside of the malfunctioning robot's chassis. When the manual tow truck moves under the malfunctioning robot's chassis, the pins 223 align with the grooves on the underside of the malfunctioning robot's chassis. Pressing the handle 262 lifts the sliding bracket 221, and the pins 223 engage the grooves, locking the malfunctioning robot and the carriage 2211 in the direction of the manual tow truck's towing. The provision of the pin 223 can effectively prevent the faulty robot from falling off the drag plate 2211 when being dragged by a manual tow truck, thereby stabilizing the towing process.

[0061] The side plate 2212 is erected in a nearly vertical state, and a locking hole 224 is opened on the side plate 2212. Figure 11 As shown. The locking hole 224 can be a through hole or a blind hole, as long as it can cooperate with the locking pin 242. Specifically, in this embodiment, the locking hole 224 is a through hole, and the locking pin 242 is located on the upward movement path of the locking hole 224. In the initial state, the height of the locking pin 242 from the chassis 213 is greater than the height of the locking hole 224 from the chassis 213; as the sliding bracket 221 gradually rises, the locking hole 224 gradually rises. When the locking hole 224 and the locking pin 242 are aligned, the locking pin 242 springs into the locking hole 224, limiting the height of the sliding bracket 221.

[0062] The top plate 2213 is in a nearly horizontal state and has a set width to prevent the lever from being separated from the top plate 2213 when the lever is in transmission connection with the lever.

[0063] In order to minimize relative displacement between the carriage 2211 and the chassis of the faulty robot and to ensure that the pin 223 is accurately inserted into the groove at the bottom of the chassis of the faulty robot, the sliding bracket 221 needs to remain stable during the ascent, preferably vertically. To achieve this purpose, the manual tug also includes a guide assembly, which includes a left guide seat 231 and a right guide seat 232. The left guide seat 231 and the right guide seat 232 are both fixed to the chassis 213 and are each provided with a slide groove 233 for the sliding bracket 221 to slide up and down. The sliding bracket 221 is located between the left guide seat 231 and the right guide seat 232 and is slidably connected to the two slide grooves 233.

[0064] Optionally, the sliding groove 233 formed on the left guide seat 231 and the right guide seat 232 is an elliptical through groove, and the sliding direction of the elliptical through groove is the up-down direction, so as to slide the sliding support 221 along the sliding groove 233 in the up-down direction. A connecting through hole is formed on the side wall of each side of the sliding support 221, and the small head of the cam bearing 222 is inserted into the connecting through hole (the side wall of each side of the sliding support 221 has a certain thickness to ensure that the cam bearing 222 is stably inserted). The large head of the cam bearing 222 is inserted into the sliding groove 233. It should be noted that the size of the large head of the cam bearing 222 is matched with the size of the sliding groove 233, that is, the large head of the cam bearing 222 can slide in the sliding groove 233 and will not obviously shake (that is, irregularly collide with the inner wall of the sliding groove) or come off due to the small size. In this embodiment, there are four cam bearings 222, two connecting through holes are formed on the side wall of each side of the sliding support 221, and two cam bearings 222 are inserted into the two connecting through holes on the left side of the sliding support 221 and are in sliding connection with the left guide seat 231, and the other two cam bearings 222 are inserted into the two connecting through holes on the right side of the sliding support 221 and are in sliding connection with the right guide seat 232.

[0065] The manual trailer also includes a connecting rod assembly, and the handle 262 is in transmission connection with the sliding support 221 through the connecting rod assembly. The connecting rod assembly includes a lever seat 253 and a lever 252, the lever seat 253 is fixedly arranged on the chassis 213, one end of the lever 252 is in transmission connection with the sliding support 221, and the other end of the lever 252 is in transmission connection with the handle 262. The handle 262 presses one end of the lever 252 which is in transmission connection with the handle 262, and through the lever action, the other end of the lever 252 is raised to lift the sliding support.

[0066] Specifically, as shown in Figure 9 the lever seat 253 is fixedly installed on the chassis 213, the middle part of the lever 252 is hinged with the lever seat 253 through a third pin shaft 256, and the lever 252 can swing relative to the lever seat 253 about the axis of the third pin shaft 256. The height of the third pin shaft 256 is higher than the height of the lock pin 242, and the height of the third pin shaft 256 is less than one half of the length of the lever 252. Due to the up-down swinging of the lever 252, the height of the third pin shaft 256 is higher than the height of the lock pin 242, which on the one hand improves the swinging amplitude of the lever 252, that is, improves the lifting height range of the sliding support, and on the other hand avoids the impact of the lever 252 with the lock pin 242 when the lever 252 swings, which affects the ejection of the lock pin 242, and reasonably allocates the space resources. Further, usually, the third pin shaft 256 is located at the middle part of the length direction of the lever 252, which is beneficial to the handle to lift the sliding support 221 without exerting too much external force. At the same time, the third pin shaft 256 is higher than one half of the length of the lever 252, which can avoid the circumferential rotation or large amplitude swinging of the lever 252 about the axis of the third pin shaft 256, and bring the effect of easy handle reset.

[0067] Further, one end of the lever 252 is provided with a cam 251 in rolling contact with the sliding bracket 221. The cam 251 is arranged below the top plate 2213 and in abutment with the top plate 2213. When the lever 252 swings about the axis of the third pin shaft 256, the motion track of the cam 251 is an arc, at this time, the cam 251 has both upward motion component and right horizontal motion component relative to the top plate 2213, please refer to Figure 9 At this time, the cam 251 is in contact with the top plate 2213 and rotates along the top plate 2213 when driving the top plate 2213 to be lifted upward, which reduces the resistance in the swinging process of the lever 252 and reduces the friction between the lever 252 and the top plate 2213. Specifically, the above-mentioned cam 251 is a circular roller.

[0068] The linkage assembly further comprises a connecting rod 254, one end of the connecting rod 254 is hinged with the other end of the lever 252 through a fourth pin shaft 257, and the other end of the connecting rod 254 is hinged with the handle 262 through the second pin shaft 255. By arranging the connecting rod 254 between the lever 252 and the handle 262, the connection mode between the handle 262 and the lever 252 is changed, and the force transmission direction is changed. In this design mode, the handle 262 can have a smaller included angle with the lever 252, which is beneficial to the transmission of force. If the lever 252 is directly connected with the handle 262, the posture of the handle 262 generally adopts a vertical posture, and the arrangement of the connecting rod 254 between the lever 252 and the handle 262 can make the handle 262 have a better operation posture.

[0069] The specific internal structure of the manual trailer has been introduced above, and the specific frame structure of the manual trailer will be introduced next.

[0070] The manual trailer comprises a handle operating assembly, and the handle operating assembly comprises a handle 261, a handle 262, a lock handle 263, a lock wire 264, a support 265 and a first pin shaft 266. The support 265 is fixed on the chassis 213 and has a height higher than that of the lock seat and the lever seat. The connecting end of the handle 262 is hinged with the support 265 through the first pin shaft 266, and the second pin shaft 255 is located at a distance behind the first pin shaft 266. In order to facilitate the position setting of the first pin shaft 266 and the second pin shaft 255 at the connecting end of the lever 252, the connecting end of the lever 252 is arranged in a plate shape similar to a sector or a circular arc, which can increase the area of the connecting end and optimize the positional relationship between the first pin shaft 266 and the second pin shaft 255, thereby providing space for the position optimization of the two.

[0071] Handles 261 are installed on both sides of the operating end of the handle 262. In order to lock the position of the sliding bracket 221 and unlock the locked position of the sliding bracket 221, the manual trailer is also provided with a lock wire 264 and a lock handle 263. The lock handle 264 is located at one of the handles 261. One end of the lock wire 264 is connected to the lock handle 263, and the other end is connected to the lock pin 242. Specifically, one end of the lock pin 242 abuts against the side plate 2212, and the other end enters the lock cavity. The lock cavity is a through hole. The lock wire enters the lock cavity and connects with the lock pin 242.

[0072] The handle 262 may be a hollow structure, and the other end of the lock wire 242 may pass through the hollow portion of the handle 262 and then connect to the lock pin 242. Alternatively, the handle 262 may be a non-hollow structure, and the lock wire 242 may be attached to the surface of the handle 262 and extend to connect to the lock pin 242.

[0073] Since the lock wire 264 needs to pass through the lever 252 and the lever seat 253 in the trailer body before it can be connected with the lock pin 242, in order to avoid the lock wire 264 from colliding with other devices when moving inside, the lock wire 264 first passes through the through hole on the lever seat 253 after entering the vehicle body. The through hole is located below the third pin shaft and is opposite to the through hole in the lock cavity. This prevents the lock wire 264 from bending in the vehicle body, which makes unlocking difficult.

[0074] The manual trailer also includes a chassis assembly, which includes rollers 211, roller seats 212, chassis 213 and universal wheels 214. Figure 3 and Figure 13 The chassis 213 is shaped like an airfoil. The front end of the chassis 213 is plate-shaped and has a narrowed contact end plate. The contact end plate has openings for mounting the rollers 211. For example, there can be two openings to accommodate two sets of rollers. In other words, a portion of the rollers 211 is located above the openings, which reduces the height of the chassis 213. The rollers 211 are connected to the chassis 213 via roller seats 212. The chassis 213 has elevated frames on both sides, and the bottom of the frames is used to mount universal wheels 214. This design reduces the height of the chassis 213 and makes the manual trailer more stable.

[0075] The use process of the manual trailer provided in the embodiment of the present application is as follows:

[0076] When the chassis 213 of the manual trailer is partially under the shelf and is driven to the directly below the malfunctioning robot, the handle 261 on the manual trailer is pressed down, the handle 262 is rotated downward around the axis of the first pin 266, the second pin 255 on the handle 262 and the connecting rod 254 connected thereto are rotated downward around the axis of the first pin 266. The connecting rod 254 is moved downward to drive the lever 252 to rotate clockwise around the axis of the third pin 256 on the lever seat 253, the cam 251 at the front end of the lever 252 drives the sliding bracket 221 to vertically slide upward along the sliding groove 233 on the left guide seat 231 and the right guide seat 232, and drives one end of the malfunctioning robot on the sliding bracket 221 to be lifted upward, so that the drive wheels of the malfunctioning robot are off the ground. When the locking hole 224 on the sliding bracket 221 is raised to be opposite to the locking pin 242, the locking pin 242 is popped into the locking hole 224 to lock the height of the sliding bracket 221. The drive wheels of the malfunctioning robot remain off the ground.

[0077] The handle 261 of the manual trailer is pulled outward to drag the malfunctioning robot to the designated repair site. When reaching the designated repair site, the handle 261 is pressed down, and when the operator feels that the handle 262 bears the weight of the malfunctioning robot, the right hand tightly holds the lock handle 263, the lock wire 264 connected to the lock handle 263 pulls the locking pin 242 out of the locking hole 224; then the handle 262 is slowly lifted upward, at this time the side of the malfunctioning robot that is lifted high gradually falls downward until the malfunctioning robot falls to the ground.

[0078] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A hand trailer, characterized in that The utility model relates to a hand-dragging vehicle, including: A chassis, a handle, a sliding support and a locking assembly; The sliding support is arranged on the chassis, and the sliding support is provided with a locking hole; The locking assembly includes a lock seat, a lock pin and an elastic element, the lock seat is fixedly arranged on the chassis, the elastic element is arranged between the lock pin and the lock seat, and the lock pin has a tendency to pop out towards the sliding support under the joint action of the sliding support, the elastic element and the lock seat; The handle is in transmission connection with the sliding support, and the handle can drive the sliding support to lift relative to the chassis; when the sliding support is lifted to the position where the locking hole is opposite to the lock pin, the lock pin is popped into the locking hole to lock the sliding support at a set height; The hand-dragging vehicle further includes a connecting rod assembly, and the handle is in transmission connection with the sliding support through the connecting rod assembly; The connecting rod assembly includes a lever seat and a lever, the lever seat is fixedly arranged on the chassis, one end of the lever is in transmission connection with the sliding support, and the other end of the lever is in transmission connection with the handle; One end of the lever is provided with a roller in rolling contact with the sliding support, and the roller is in abutment with the lower surface of the top plate in the sliding support; The connecting rod assembly further includes a connecting rod, one end of the connecting rod is hinged to the other end of the lever, and the other end of the connecting rod is in transmission connection with the handle; The middle part of the lever is hinged to the lever seat through a third pin shaft, the lever can swing relative to the lever seat about the axis of the third pin shaft, and the height of the third pin shaft is higher than the height of the lock pin.

2. The hand-towed trailer of claim 1, wherein, The locking assembly further includes a lock cavity formed in the lock seat, and the lock pin is arranged in the lock cavity.

3. The hand-towed trailer of claim 1, wherein, The elastic element is a spring sleeved outside the lock pin.

4. The hand-towed trailer of claim 1, wherein, The sliding support is Z-shaped and includes a drag plate, a side plate and a top plate fixedly connected in sequence, the drag plate is provided with a pin for limiting dragged articles, and the drag plate is used for dragging articles; the side plate is provided with the locking hole, and the top plate is in transmission connection with the handle.

5. A hand trailer according to any one of claims 1-4, characterised in that The hand-dragging vehicle further includes a left guide seat and a right guide seat, the left guide seat and the right guide seat are fixedly arranged on the chassis and are each provided with a sliding groove for the sliding support to slide up and down, and the sliding support is arranged between the left guide seat and the right guide seat and is in sliding connection with the two sliding grooves.

6. The hand-towed trailer of claim 5, wherein, Cam bearings are respectively arranged on the two sides of the sliding support, and the sliding support is in sliding connection with the corresponding sliding grooves through the cam bearings on the two sides.

7. The hand-towed trailer of claim 5, wherein, The sliding groove in the left guide seat and the sliding groove in the right guide seat are both through grooves.

8. The hand-towed trailer of claim 1, wherein, The hand-dragging vehicle further includes a left guide seat and a right guide seat, the left guide seat and the right guide seat are fixedly arranged on the chassis and are each provided with a sliding groove for the sliding support to slide up and down; the sliding support is arranged between the left guide seat and the right guide seat, cam bearings are respectively arranged on the two sides of the sliding support, and the sliding support is in sliding connection with the corresponding sliding grooves through the cam bearings on the two sides.

9. The hand-towed trailer of claim 8, wherein, When the handle is pressed down, the handle drives the end of the lever connected with the handle to move down, and the end of the lever connected with the sliding support drives the sliding support to slide up along the left and right guide seats.

10. The hand-towed trailer of claim 1, wherein, The hand-drawn trailer further comprises a lock handle and a lock wire, the lock handle is installed at the operating end of the handle, and the lock handle and the lock pin are connected through the lock wire.

11. The hand-towed trailer of claim 10, wherein, When the lock handle is pulled, the lock handle drives the lock wire to pull the lock pin out of the locking hole.

12. The hand-towed trailer of claim 1, wherein, The base plate is fixed with a support, and the connecting end of the handle is hinged to the support.

13. The hand-towed trailer of claim 1, wherein, The base plate is installed with a roller seat at one end close to the sliding support, and the roller seat is installed with a roller below; and the base plate is installed with a universal wheel at the lower part of one end close to the handle.

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