CN220500792U - Pull rod assembly, trailer and mobile energy storage equipment - Google Patents

Abstract

The application relates to the field of energy storage equipment, specifically provides a pull rod assembly, trailer and removal energy storage equipment, and the pull rod assembly includes casing and pull rod, and the pull rod includes sliding seat and gripping portion. The sliding seat comprises a main body and a limiting part, wherein the main body is slidably arranged on the shell, and the limiting part is slidably connected with the main body and is configured to be separated from the shell or limited on the shell. The holding part is in sliding connection with the shell, one end of the extending direction of the holding part is rotationally connected with the main body, and the other end of the extending direction of the holding part is positioned outside the shell. The holding part is configured to drive the limiting part to move when the extending direction of the holding part is parallel to the sliding direction of the main body so as to enable the limiting part to be separated from the shell, thereby releasing the limiting fit of the limiting part and the shell, and the limiting part is also configured to limit the limiting part to the shell when the extending direction of the holding part is intersected with the sliding direction of the main body so as to limit the sliding of the main body, so that different application scenes can be applied conveniently.

Description

Pull rod assembly, trailer and mobile energy storage equipment

Technical Field

The application relates to the field of carrying energy storage devices, in particular to a pull rod assembly, a trailer and mobile energy storage equipment.

Background

Trailers are commonly used for carrying objects, and are often equipped with tie rods by which a user pushes, pulls or guides the movement of the trailer. In the related art, the angle between the pull rod and the frame of the trailer is relatively fixed, but the application scene of the trailer is complex, and the relative fixation of the angle between the pull rod and the frame is difficult to cope with different application scenes.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a drawbar assembly, a trailer and a mobile energy storage device, wherein the drawbar assembly is adaptable to a plurality of applications.

The embodiment of the application provides a pull rod assembly, including casing and pull rod, the pull rod includes sliding seat and gripping portion. The sliding seat comprises a main body and a limiting part, wherein the main body is arranged on the shell in a sliding manner, and the limiting part is connected with the main body in a sliding manner and is configured to be separated from the shell or limited on the shell. The holding part is in sliding connection with the shell, one end of the extending direction of the holding part is in rotary connection with the main body, and the other end of the extending direction of the holding part is positioned outside the shell. The holding part is configured to drive the limiting part to move when the extending direction of the holding part is parallel to the sliding direction of the main body so as to enable the limiting part to be separated from the shell, thereby releasing the limiting fit of the limiting part and the shell, and the limiting part is further configured to limit the limiting part to be positioned on the shell when the extending direction of the holding part is intersected with the sliding direction of the main body so as to limit the sliding of the main body.

In the pull rod assembly of the above embodiment, when the extending direction of the holding portion is parallel to the sliding direction of the main body, the holding portion can release the limit of the limiting portion on the main body, so that the pull rod can slide relative to the housing, and the overall length of the pull rod assembly can be adjusted. When the extending direction of the holding part is intersected with the sliding direction of the main body, the limiting part is limited on the shell to limit the main body to slide, and at the moment, the holding part can rotate relative to the frame to adjust the relative angle of the holding part and the frame. The whole length of the pull rod assembly and the relative angle between the holding part and the frame are adjusted, so that the pull rod assembly is applicable to different application scenes.

In at least one embodiment, the shell is provided with a positioning hole, and the limiting part comprises a limiting column, an elastic piece and a pressing block. The limiting column is in sliding connection with the main body, and the sliding direction of the limiting column is perpendicular to the sliding direction of the main body. One end of the elastic piece is contacted with the main body, the other end of the elastic piece is contacted with the limiting column, and the elastic piece is configured to push the limiting column to extend into the positioning hole when the extending direction of the holding part is intersected with the sliding direction of the main body. The pressing block is slidably arranged on the main body, the sliding direction of the pressing block is parallel to that of the main body, and when the extending direction of the holding part is parallel to that of the main body, the holding part pushes the pressing block to move towards the limiting column, so that the limiting column is separated from the positioning hole.

In the pull rod assembly of the above embodiment, when the extending direction of the holding portion is parallel to the sliding direction of the main body, the holding portion drives the pressing block, and the pressing block drives the limiting column to separate from the positioning hole, so as to release the limit of the main body. When the extending direction of the holding part is intersected with the sliding direction of the main body, the holding part gives up part of space, so that the pressing block can move for a certain distance towards the holding part, and the limiting column can be driven to be matched with the shell through the elastic force of the elastic piece, and the limiting column can push the pressing block to move towards the direction of the holding part. The holding part rotates to limit or release the limit of the main body, so that the operation process is simple and convenient.

In at least one embodiment, the limit post is provided with a first mating surface, the first mating surface is inclined towards the corresponding positioning hole from the direction from close to far away from the holding part, and the pressing block is provided with a second mating surface, and the second mating surface is in sliding contact with the first mating surface.

In the pull rod assembly of the above embodiment, the first mating surface contacts with the second mating surface, and the limiting post receives a component force to enable the limiting post to be separated from the positioning hole.

In at least one embodiment, the press block includes a connecting rod and two press rods. The connecting rod slidingly arranged on the main body, the connecting rod extends along the sliding direction perpendicular to the main body, and when the extending direction of the holding part is parallel to the sliding direction of the connecting rod, the holding part pushes the connecting rod to move towards the limit column. Two compression bars are arranged at the opposite ends of the connecting rod at intervals, and one end of each compression bar is contacted with one limit column.

In the pull rod assembly of the above embodiment, through setting up in connecting rod and depression bar, when the connecting rod moved towards spacing post, can control two spacing posts simultaneously and break away from the locating hole, easy operation to two spacing posts can remove simultaneously, can reduce that one spacing post breaks away from the locating hole, another does not break away from the condition emergence of locating hole.

In at least one embodiment, the grip portion includes a swivel portion, a first section, a second section, and a grip. The rotating shaft part is slidably arranged on the shell and is rotationally connected with the main body. The first section is slidably disposed in the housing and connected to the shaft portion. The second section is slidably arranged on the first section, and the sliding direction of the second section is parallel to the sliding direction of the first section. The handle is connected with one end of the second section far away from the rotating shaft part.

In the pull rod assembly of the above embodiment, the rotation shaft portion is rotatably connected with the main body, so as to realize the rotation connection of the whole holding portion with the main body. Because second festival and first festival sliding connection, first festival and casing sliding connection through adjusting the relative position of first festival and second festival and the relative position of first festival and casing, can adjust the whole length of gripping portion to make the user can adjust the whole length of pull rod according to specific demand, and drag the trailer through holding the handle and remove.

In at least one embodiment, the housing is provided with a limiting hole, and the first section includes a first shell, a first positioning column, a first reset piece and a first push block. The first housing is slidably disposed in the housing. The first positioning column is slidably arranged on the first shell, and the sliding direction is perpendicular to the sliding direction of the first shell. One end of the first reset piece is connected with the first shell, and the other end of the first reset piece is connected with the first positioning column so as to push the first positioning column to extend into the limiting hole. The first pushing block is slidably arranged on the first shell, the sliding direction of the first pushing block is parallel to that of the first shell, and the first pushing block can move towards the first positioning column so as to push the first positioning column to be separated from the limiting hole.

In the pull rod assembly of the above embodiment, the first positioning column is pushed to extend into the limiting hole by the first reset piece, so that the first shell is limited to slide relative to the shell. The first pushing block moves towards the first positioning column to push the first positioning column to be separated from the limiting hole, so that the position limitation of the first shell is relieved. The spacing of first shell and the mode of releasing spacing are simple and convenient, when first shell is spacing, can be convenient for the user to stimulate the trailer, when the spacing of removing first shell and main part, can adjust the relative position of first shell and casing to adjust the whole length of pull rod assembly.

In at least one embodiment, the first section is provided with a fixing hole, and the second section comprises a second shell, a second positioning column, a second reset piece and a second push block. The second housing is slidably disposed in the first section with a sliding direction parallel to the first section. The second positioning column is slidably arranged on the second shell, and the sliding direction is perpendicular to the sliding direction of the first section. One end of the second reset piece is connected with the second shell, and the other end of the second reset piece is connected with the second positioning column so as to push the second positioning column to extend into the fixing hole. The second pushing block is slidably arranged on the second shell, the sliding direction of the second pushing block is parallel to that of the first section, and the second pushing block can move towards the second positioning column so as to push the second positioning column to be separated from the fixing hole.

In the pull rod assembly of the above embodiment, the second positioning column is pushed to extend into the fixing hole by the second reset piece, so that the second shell is limited to slide relative to the first shell. And the second pushing block moves towards the second positioning column to push the second positioning column to be separated from the fixing hole, so that the position limitation of the second shell is released. The spacing of second shell and the mode of releasing spacing are simple and convenient, when the second shell is spacing, can be convenient for the user to stimulate the trailer, when releasing the second shell spacing, can adjust the relative position of second shell and first shell to adjust the whole length of portion of gripping.

The embodiment of the application also provides a trailer, including frame and roller set, the frame is used for placing energy memory, roller set up in the frame, the trailer still includes the pull rod subassembly, the pull rod subassembly set up in the frame.

In the trailer of the embodiment, the trailer is dragged by the pull rod assembly, so that the energy storage device on the frame is carried, and the operation process is simple and convenient.

In at least one embodiment, the roller set comprises a first roller, a second roller and a main wheel which are all arranged on the frame, wherein the first roller and the main wheel are used for forming a first plane at a part contacted with the ground, the second roller and the main wheel are used for forming a second plane at a part contacted with the ground, and the first plane is intersected with the second plane. The trailer has a flat-lying posture, a vertical posture and an inclined posture, when the trailer is in the flat-lying posture, the first roller and the main wheel are in contact with the ground, when the trailer is in the vertical posture, the second roller and the main wheel are in contact with the ground, and when the trailer is in the inclined posture, the main wheel is in contact with the ground.

In the trailer of the above embodiment, the user can change the posture of the trailer according to the actual scene so as to pull the trailer. Specifically, can let the trailer be in the gesture of keeping flat on the road surface flat section, first gyro wheel and main wheel contact with ground, the trailer focus is low, and the trailer removes steadily. When the environment is complex and the road surface is crowded, the trailer can be arranged in a vertical posture so as to reduce the occupied space of the trailer in the horizontal direction. When on a slope, the trailer may be set to an inclined position to facilitate the towing of the trailer by a user.

The embodiment of the application also provides a mobile energy storage device, which comprises an energy storage device, wherein the mobile energy storage device further comprises a trailer, and the energy storage device is arranged on a frame of the trailer.

In the mobile energy storage device of the above embodiment, the energy storage device is disposed on the frame of the trailer, and the energy storage device can be dragged to move by the pull rod assembly of the trailer, so as to facilitate carrying of the energy storage device.

In the pull rod assembly, the trailer and the mobile energy storage equipment, the trailer has different postures, and a user can control the trailer to be switched to the corresponding posture according to specific conditions so that the user drags the trailer. When the trailer is in different postures, the pull rod assembly can correspondingly extend to different positions so as to adapt to the trailers in different postures, and therefore different application scenes can be conveniently applied.

Drawings

Fig. 1 is a perspective view of a mobile energy storage device according to an embodiment of the present application.

Fig. 2 is a perspective view of the drawbar assembly of fig. 1.

Fig. 3 is an exploded view of the drawbar assembly of fig. 1.

Fig. 4 is a perspective view of the drawbar of fig. 1.

Fig. 5 is a perspective view of the body, the pressing block and the stopper post of fig. 4.

Fig. 6A, 6B, and 6C are side views of various states of the tie rod assembly.

Fig. 7 is a cross-sectional view of fig. 6A.

Fig. 8 is a cross-sectional view of fig. 6B.

Fig. 9 is a cross-sectional view of fig. 6C.

Fig. 10 is a perspective view of the mobile energy storage device of the trailer of fig. 1 in a laid-flat position.

Fig. 11 is a perspective view of the mobile energy storage device of the trailer of fig. 1 in a vertical position.

Fig. 12 is a perspective view of the mobile energy storage device of fig. 11 with the drawbar retracted housing.

Fig. 13 is a perspective view of the trailer of fig. 1.

Fig. 14 is an exploded view of the trailer of fig. 1.

Fig. 15 is an exploded view of the first roller, main wheel mount of fig. 1.

Description of the main reference signs

100-Pull rod Assembly 10-Shell 11-Cavity

12-locating hole 13-limiting hole 20-pull rod

21-sliding seat 211-main body 212-limiting part

2121-stop post 21211-first mating surface 2122-resilient member

2123-briquetting 21231-connecting rod 21232-depression bar

212321-second mating face 22-grip portion 221-spindle portion

222-first section 2221-first housing 22211-securing aperture

2222-first positioning column 2223-first reset element 2224-first push block

223-second section 2231-second shell 2232-second positioning post

2233-second restoring member 2234-second push block 224-grip

2241-button 30-frame 31-mount

311-upper shell 312-lower shell 313-first beam

314-second beam 32-limit bracket 321-limit lever

322-cross bar 33-support bracket 331-support bar

332-connecting rod 333-supporting plate 34-positioning column

40-roller group 41-first roller 42-second roller

43-main wheel 50-snap member 51-first mating portion

52-second mating portion 200-trailer 300-energy storage device

301-connection 400-mobile energy storage device S1-first plane

S2-second plane

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments.

It should be noted that when two elements (planes and lines) are disposed in parallel, it should be understood that the relationship between the two elements includes both parallel and substantially parallel. Wherein substantially parallel is understood to mean that there may be an angle between the two elements that is greater than 0 deg. and less than or equal to 10 deg..

When two elements (planes, lines) are disposed vertically, it is understood that the relationship between the two elements includes both vertically and generally vertically. Wherein substantially perpendicular is understood to mean that the angle between the two elements is greater than or equal to 80 deg. and less than 90 deg..

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Trailers are commonly used for carrying objects, and are often equipped with tie rods by which a user pushes, pulls or guides the movement of the trailer. In the related art, the angle between the pull rod and the frame of the trailer is relatively fixed, but the application scene of the trailer is complex, and the relative fixation of the angle between the pull rod and the frame is difficult to cope with different application scenes.

In view of this, some embodiments of the present application provide a tie rod assembly including a housing and a tie rod including a sliding seat and a grip portion. The sliding seat comprises a main body and a limiting part, wherein the main body is arranged on the shell in a sliding manner, and the limiting part is connected with the main body in a sliding manner and is configured to be separated from the shell or limited on the shell. The holding part is in sliding connection with the shell, one end of the extending direction of the holding part is in rotary connection with the main body, and the other end of the extending direction of the holding part is positioned outside the shell. The holding part is configured to drive the limiting part to move when the extending direction of the holding part is parallel to the sliding direction of the main body so as to enable the limiting part to be separated from the shell, thereby releasing the limiting fit of the limiting part and the shell, and the limiting part is further configured to limit the limiting part to be positioned on the shell when the extending direction of the holding part is intersected with the sliding direction of the main body so as to limit the sliding of the main body.

In the pull rod assembly of the above embodiment, when the extending direction of the holding portion is parallel to the sliding direction of the main body, the holding portion can release the limit of the limiting portion on the main body, so that the pull rod can slide relative to the housing, and the overall length of the pull rod assembly can be adjusted. When the extending direction of the holding part is intersected with the sliding direction of the main body, the limiting part is limited on the shell to limit the main body to slide, and at the moment, the holding part can rotate relative to the frame to adjust the relative angle of the holding part and the frame. The whole length of the pull rod assembly and the relative angle between the holding part and the frame are adjusted, so that the pull rod assembly is applicable to different application scenes.

Some embodiments of the present application will be described below with reference to the accompanying drawings. The embodiments described below and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1, one embodiment of the present application provides a drawbar assembly 100, a trailer 200 including the drawbar assembly 100, and a mobile energy storage device 400 including the trailer 200. The mobile energy storage device 400 further includes an energy storage device 300, where the energy storage device 300 is disposed on the trailer 200, and the energy storage device 300 can be driven to move by moving the trailer 200. The energy storage device 300 includes, but is not limited to, a battery pack, an outdoor power source, etc. for storing energy and releasing the energy for use by a user when desired.

As an example, the energy storage device 300 includes an energy storage power source and an energy storage current transformer that are stacked on the trailer 200, and the trailer 200 is still capable of stably securing the energy storage power source and the energy storage current transformer during movement.

The trailer 200 further comprises a frame 30 and a roller set 40, wherein the roller set 40 and the pull rod assembly 100 are both arranged on the frame 30, and a user pulls the pull rod assembly 100 to drive the roller set 40 to move so that the frame 30 moves along with the roller set 40. The roller set 40 may be connected to a power source to automatically move or relieve the pressure of manually dragging the pull rod assembly 100, or the roller set 40 may be disconnected from the power source and driven by external force to move the trailer 200.

Referring to fig. 1, 2 and 3, the pull rod assembly 100 includes a housing 10 and a pull rod 20, the housing 10 is disposed on a frame 30, the pull rod 20 is connected with the housing 10, and a user holds the pull rod 20 to push and pull the whole trailer 200.

Referring to fig. 4 and 5, the pull rod 20 includes a sliding seat 21 and a grip portion 22. The slide seat 21 is slidably disposed on the housing 10, and one end of the grip portion 22 in the extending direction is rotatably connected to the slide seat 21, and the other end of the grip portion 22 in the extending direction is located outside the housing 10. The user may control the end of the grip 22 that is located outside of the housing 10 to adjust the position of the tie rod 20 relative to the housing 10 and thus the overall length of the tie rod assembly 100. In addition, since one end of the holding portion 22 is rotatably connected with the sliding seat 21, when the holding portion 22 is integrally located outside the housing 10, the holding portion 22 can rotate relative to the sliding seat 21 so as to facilitate the user to control the holding portion 22, thereby improving the user experience.

Referring to fig. 6A, 6B, 6C and 7, the sliding seat 21 includes a main body 211 and a limiting portion 212, the main body 211 is slidably disposed on the housing 10, and the limiting portion 212 is slidably connected to the main body 211 and configured to be capable of being separated from the housing 10 or limited to the housing 10. One end of the grip portion 22 in the extending direction is rotatably connected to the main body 211.

The holding portion 22 is configured such that when the extending direction of the holding portion 22 is parallel to the sliding direction of the main body 211, the holding portion 22 drives the limiting portion 212 to move, so that the limiting portion 212 is separated from the housing 10, and the limiting engagement between the limiting portion 212 and the housing 10 is released. The stopper 212 is further configured such that when the extending direction of the grip 22 intersects the sliding direction of the main body 211, the stopper 212 is stopped at the housing 10 to limit the sliding of the main body 211.

When the extending direction of the holding portion 22 is parallel to the sliding direction of the main body 211, the holding portion 22 can release the limit of the limiting portion 212 on the main body 211, so that the pull rod 20 can slide relative to the housing 10, so as to adjust the overall length of the pull rod assembly 100. When the extending direction of the holding portion 22 intersects with the sliding direction of the main body 211, the limiting portion 212 is limited on the housing 10 to limit the main body 211 to slide, and at this time, the holding portion 22 can rotate relative to the frame 30 to adjust the relative angle between the holding portion 22 and the frame 30. By adjusting the overall length of the pull rod assembly 100 and the relative angle of the grip 22 and the frame 30, the pull rod assembly 100 is suitable for different application scenarios.

For convenience of description, a coordinate system is established in the drawings, the sliding direction of the main body 211 is parallel to the X axis, and the sliding direction of the limiting portion 212 is parallel to the Y axis, and it is understood that the sliding direction of the limiting portion 212 is not limited to be perpendicular to the sliding direction of the main body 211, for example, an included angle between the sliding direction of the limiting portion 212 and the sliding direction of the main body 211 may be 80 °, 85 °. For convenience of explanation, the following description will be given by taking an example in which the sliding direction of the stopper 212 is perpendicular to the sliding direction of the main body 211.

Referring to fig. 3, 5 and 7, optionally, in some embodiments, the housing 10 extends along the X-axis, the housing 10 is provided with a cavity 11, the sliding seat 21 is located in the cavity 11, and a sidewall of the housing 10 is provided with a positioning hole 12. The stopper 212 includes a stopper post 2121, an elastic member 2122, and a pressing block 2123. The stopper post 2121 is slidably disposed along the Y-axis on the main body 211. The elastic member 2122 has one end in contact with the main body 211 and the other end in contact with the stopper post 2121. As shown in fig. 6A, 6B, 7 and 8, the pressing block 2123 is slidably disposed on the main body 211 along the X axis, and the pressing block 2123 is located between the holding portion 22 and the limiting post 2121, when the extending direction of the holding portion 22 is parallel to the X axis, the holding portion 22 can push the pressing block 2123 to move towards the limiting post 2121, so that the limiting post 2121 is separated from the positioning hole 12, and the limitation of the main body 211 is released. As shown in fig. 6C and 9, when the extending direction of the holding portion 22 intersects the sliding direction of the main body 211, that is, when the extending direction of the holding portion 22 intersects the X-axis, the elastic member 2122 can push the limit post 2121 to extend into the positioning hole 12, thereby limiting the main body 211 to slide.

As shown in fig. 6A, 6B, 7 and 8, when the extending direction of the holding portion 22 is parallel to the X axis, the holding portion 22 drives the pressing block 2123, and the pressing block 2123 drives the limiting post 2121 to disengage from the positioning hole 12, so as to release the limitation of the main body 211. As shown in fig. 6C and fig. 9, when the extending direction of the holding portion 22 intersects the X-axis, the holding portion 22 gives up a part of space, so that the pressing block 2123 can move a certain distance towards the holding portion 22, and therefore, the limiting post 2121 can be driven to cooperate with the housing 10 by the elastic force of the elastic member 2122, and the limiting post 2121 pushes the pressing block 2123 to move towards the holding portion 22. The main body 211 is limited or released by the rotation of the holding part 22, and the operation process is simple and convenient.

Optionally, the positioning hole 12 is located at an end of the housing 10 near the end of the holding portion 22 extending out of the housing 10, and when the main body 211 moves to the positioning hole 12 to enable the limit post 2121 to extend into the positioning hole 12, the holding portion 22 is located entirely outside the housing 10, so that the holding portion 22 can rotate relative to the main body 211, and the housing 10 does not interfere with the holding portion 22.

Optionally, the main body 211 is provided with sliding grooves corresponding to the elastic element 2122, the limiting post 2121 and the pressing block 2123, so that the limiting post 2121 and the pressing block 2123 can slide relative to the main body 211, and the elastic element 2122 can stably apply elastic force to the limiting post 2121.

Referring to fig. 5 and 7, optionally, in some embodiments, the limit post 2121 is provided with a first mating surface 21211, the first mating surface 21211 is inclined toward the corresponding positioning hole 12 from the direction approaching to the direction separating from the grip portion 22, and the pressing block 2123 is provided with a second mating surface 212321, where the second mating surface 212321 is in sliding contact with the first mating surface 21211.

When the pressing block 2123 moves toward the limit post 2121, the second mating surface 212321 contacts the first mating surface 21211, the pressing block 2123 applies a force along the X-axis direction to the limit post 2121, and the limit post 2121 receives a component force along the Y-axis direction by the inclined arrangement of the first mating surface 21211, so that the limit post 2121 can be separated from the positioning hole 12. The first matching surface 21211 and the second matching surface 212321 are arranged to change the stress direction, the pressing block 2123 does not need to move along the Y-axis direction, and the limit post 2121 can also be controlled to move along the Y-axis direction, so that the structure is more reasonable in space layout, and the size of the pull rod 20 is reduced during design.

It will be appreciated that the second mating surface 212321 can be a bevel having a slope that matches the slope of the first mating surface 21211, thereby increasing the contact area of the second mating surface 212321 with the first mating surface 21211. The second mating surface 212321 can also be a plane parallel to the Y axis.

Optionally, in some embodiments, the number of the elastic members 2122 and the limit posts 2121 is one, and the sliding purpose of the limiting body 211 is achieved by using less material, which can reduce the cost.

In other embodiments, the positioning holes 12 are disposed on two opposite sides of the housing 10, the number of the elastic members 2122 and the number of the limiting posts 2121 are two, the two limiting posts 2121 are disposed at intervals along the Y-axis direction, each elastic member 2122 is connected to one limiting post 2121, and the two elastic members 2122 are located between the two limiting posts 2121. By providing two limit posts 2121 to extend into corresponding positioning holes 12, sliding of the body 211 can be stably defined.

Referring to fig. 5 and 7, optionally, in some embodiments, the pressing block 2123 includes a connecting rod 21231 and two pressing rods 21232, and the connecting rod 21231 extends along the Y-axis direction and is slidably disposed on the main body 211 along the X-axis direction. Each strut 21232 extends in the X-axis direction and has one end connected to the connecting rod 21231 and the other end provided with a second mating surface 212321 for contacting the first mating surface 21211 of the corresponding stopper post 2121.

As shown in fig. 6A, 6B, 7 and 8, when the extending direction of the holding portion 22 is parallel to the X-axis direction, the holding portion 22 pushes the connecting rod 21231 to move towards the limit post 2121, so that the compression bar 21232 can push the corresponding limit post 2121 to disengage the limit post 2121 from the positioning hole 12.

As shown in fig. 6C and fig. 9, when the extending direction of the holding portion 22 intersects the X-axis direction, the elastic member 2122 pushes the limiting post 2121 to extend into the positioning hole 12, the limiting post 2121 pushes the pressing rod 21232, and the pressing rod 21232 drives the connecting rod 21231 to move toward the holding portion 22.

Through set up in connecting rod 21231 and depression bar 21232, when connecting rod 21231 moved towards spacing post 2121, can control two spacing posts 2121 simultaneously and break away from locating hole 12, easy operation to two spacing posts 2121 can move simultaneously, can reduce that one spacing post 2121 breaks away from locating hole 12, another does not break away from the condition emergence of locating hole 12.

Optionally, in some embodiments, the grip 22 includes a shaft portion 221, a first section 222, a second section 223, and a grip 224. The rotation shaft 221 is slidably provided in the housing 10 along the X-axis and is rotatably connected to the main body 211, and the rotation axis of the rotation shaft 221 extends in the Y-axis direction. The first section 222 is slidably provided in the housing 10 in the X-axis direction, and is connected to the rotation shaft 221. The second section 223 is slidably disposed on the first section 222 along the X-axis direction. The grip 224 is connected to an end of the second section 223 remote from the rotation shaft portion 221. The extending direction of the grip portion 22 is the extending direction of the first section 222 and the second section 223.

The rotation shaft 221 is rotatably connected to the main body 211, so that the grip 22 is integrally rotatably connected to the main body 211. Since the second section 223 is slidably connected to the first section 222, the first section 222 is slidably connected to the housing 10, as shown in fig. 6A and 6B, by adjusting the relative positions of the first section 222 and the second section 223 and the relative positions of the first section 222 and the housing 10, the overall length of the grip 22 can be adjusted, so that the user can adjust the overall length of the pull rod 20 according to specific requirements, and drag the trailer 200 to move through the grip 224.

Alternatively, in some embodiments, the shaft portion 221 may be provided with an arc-shaped groove (not shown) adapted to the connecting rod 21231, and the connecting rod 21231 is at least partially located in the arc-shaped groove when the extending direction of the grip portion 22 intersects the X-axis, and the connecting rod 21231 is located outside the arc-shaped groove when the extending direction of the grip portion 22 is parallel to the X-axis, so that the shaft portion 221 can push the connecting rod 21231.

In other embodiments, the shaft 221 may be provided with an eccentric surface (not shown) that contacts the connecting rod 21231, and the eccentric surface can push the connecting rod 21231 to move when the shaft 221 rotates.

In the X-axis direction, the rotation shaft 221 is rotatably connected to the main body 211 at one side and connected to one end of the first section 222 at the other side. When the grip 22 rotates from intersecting the X axis to parallel to the X axis, the shaft 221 contacts the connecting rod 21231 of the pressing block 2123 and gradually pushes the connecting rod 21231 to move toward the limit post 2121, so that the pressing rod 21232 pushes the limit post 2121 to disengage from the positioning hole 12.

Referring to fig. 7, 8 and 9, optionally, in some embodiments, the housing 10 is provided with a limiting hole 13, and the first section 222 includes a first housing 2221, a first positioning column 2222, a first reset element 2223 and a first pushing block 2224. The first housing 2221 is slidably provided to the housing 10 in the X-axis direction. The first positioning column 2222 is slidably disposed in the first housing 2221 in the Y-axis direction. One end of the first reset element 2223 is connected with the first shell 2221, and the other end is connected with the first positioning column 2222, so as to push the first positioning column 2222 to extend into the limiting hole 13. The first pushing block 2224 is slidably disposed on the first housing 2221, and the sliding direction is parallel to the sliding direction of the first housing 2221, where the first pushing block 2224 can move towards the first positioning column 2222 to push the first positioning column 2222 to separate from the limiting hole 13.

The first positioning column 2222 is pushed to extend into the limiting hole 13 by the first reset element 2223, so that the first housing 2221 is limited to slide relative to the housing 10. The first positioning column 2222 is pushed to disengage from the limiting hole 13 by the first pushing block 2224 moving toward the first positioning column 2222, thereby releasing the position limitation of the first housing 2221. The limiting and releasing modes of the first shell 2221 are simple and convenient, when the first shell 2221 is limited, the trailer 200 can be pulled by a user conveniently, and when the limiting of the first shell 2221 and the main body 211 is released, the relative positions of the first shell 2221 and the shell 10 can be adjusted, so that the overall length of the pull rod assembly 100 is adjusted.

Alternatively, the limiting hole 13 is the same as the aperture of the positioning hole 12, that is, the first positioning column 2222 can also extend into the positioning hole 12, thereby defining the sliding of the first housing 2221. Since the extending direction of the grip portion 22 is parallel to the X-axis direction when the first housing 2221 is positioned in the housing 10, the stopper post 2121 remains retracted and does not protrude into the stopper hole 13.

Optionally, in some embodiments, the number of the positioning holes 12 on the same side is one, the number of the limiting holes 13 is two, and the holes disposed on the housing 10 are the first limiting hole 13, the second limiting hole 13 and the positioning hole 12 in sequence along the direction that the first section 222 slides out of the housing 10. When the first section 222 is received in the housing 10, the first positioning column 2222 extends into the first limiting hole 13. When the first section 222 partially protrudes outside the housing 10, the first positioning column 2222 protrudes into the second limiting hole 13. When the first section 222 is fully extended out of the housing 10 to enable rotation of the grip 22, the limit post 2121 extends into the locating hole 12. It is understood that the number of the positioning holes 12 and the limiting holes 13 is not limited thereto, and corresponding holes may be provided according to specific requirements.

Optionally, the first housing 2221 is provided with a corresponding sliding slot, so that the first positioning column 2222 and the first pushing block 2224 can stably slide, and the first reset element 2223 can stably push the first positioning column 2222. Optionally, the first reset element 2223 is a spring.

Alternatively, the limiting holes 13 may be disposed on two opposite sides of the housing 10, where the number of the first positioning columns 2222, the first pushing blocks 2224, and the first resetting pieces 2223 is two, and each first positioning column 2222 corresponds to one first pushing block 2224 and one first resetting piece 2223. The two first positioning columns 2222 are arranged at intervals along the Y-axis direction. Optionally, the number of the limiting holes 13 is multiple, the limiting holes 13 on the same side are arranged at intervals along the X-axis direction, and the first positioning columns 2222 extend into different limiting holes 13, so that the first shell 2221 is limited at different positions of the housing 10.

Optionally, the first positioning column 2222 and the first pushing block 2224 are both provided with first inclined planes that are matched, so that when the first pushing block 2224 moves towards the X-axis direction, a force towards the Y-axis direction is applied to the first positioning column 2222, so that the first positioning column 2222 is separated from the limiting hole 13. It is to be understood that the first inclined surface may be disposed only on the first positioning column 2222, and the surface of the first push block 2224 contacting the first positioning column 2222 is a plane parallel to the Y-axis direction.

The first pushing block 2224 moves towards the first positioning column 2222 in a plurality of manners, and may be selectively moved according to specific manners, in some embodiments, the pull rod assembly 100 further includes a push rod component (not shown in the drawings), a button 2241 is disposed at the grip 224, the push rod component is disposed in the first shell 2221 and is connected to the first pushing block 2224 and the button 2241, and a user can control the push rod component to drive the first pushing block 2224 to move towards the first positioning column 2222 by pressing the button 2241.

In other embodiments, the second section 223 is slidably connected to the first housing 2221 housing 10 along the X-axis direction, and the second section 223 can push the first push block 2224 to move toward the first positioning column 2222.

Optionally, a fixing hole 22211 is provided on a side wall of the first housing 2221, and the second section 223 includes a second housing 2231, a second positioning post 2232, a second reset element 2233, and a second push block 2234. The second housing 2231 is slidably disposed at the first section 222 in the X-axis direction. The second positioning column 2232 is slidably disposed in the Y-axis direction in the second housing 2231. One end of the second restoring member 2233 is connected with the second housing 2231 and the other end is connected with the second positioning post 2232 to push the second positioning post 2232 to extend into the fixing hole 22211. The second push block 2234 is slidably disposed on the second housing 2231 along the X-axis direction, and the second push block 2234 can move toward the second positioning post 2232 to push the second positioning post 2232 out of the fixing hole 22211.

The second positioning post 2232 is pushed into the fixing hole 22211 by the second restoring member 2233, thereby defining the second housing 2231 to slide with respect to the first housing 2221. The second positioning post 2232 is pushed to be separated from the fixing hole 22211 by the second push block 2234 to move toward the second positioning post 2232, thereby releasing the position limitation of the second housing 2231. The limiting and releasing of the second housing 2231 is simple and convenient, when the second housing 2231 is limited, the user can conveniently pull the trailer 200, and when the second housing 2231 is released, the relative position of the second housing 2231 and the first housing 2221 can be adjusted, thereby adjusting the overall length of the grip 22.

Optionally, the second housing 2231 is provided with a sliding groove corresponding to the second positioning post 2232 and the second pushing block 2234, so that the second positioning post 2232 and the second pushing block 2234 can stably slide, and the second resetting piece 2233 can stably push the second positioning post 2232. Optionally, the second restoring member 2233 is a spring.

Alternatively, the fixing holes 22211 may be disposed on two opposite sides of the second housing 2231, and the number of the second positioning posts 2232, the second pushing blocks 2234, and the second restoring pieces 2233 is two, and each of the second positioning posts 2232 corresponds to one of the second pushing blocks 2234 and one of the second restoring pieces 2233. The two second positioning posts 2232 are spaced apart along the Y-axis direction. Alternatively, the number of the fixing holes 22211 is plural, and the fixing holes 22211 on the same side are arranged at intervals along the X-axis direction, and extend into different fixing holes 22211 through the second positioning posts 2232, so that the second housing 2231 is limited at different positions of the first housing 2221.

Optionally, the second positioning post 2232 and the second pushing block 2234 are provided with second inclined surfaces that cooperate with each other, so that when the second pushing block 2234 moves in the X-axis direction, a force in the Y-axis direction is applied to the second positioning post 2232, so that the second positioning post 2232 is separated from the fixing hole 22211. It is to be understood that the second inclined surface may be disposed only on the second positioning post 2232, and the surface of the second push block 2234 contacting the second positioning post 2232 is a plane parallel to the Y-axis direction.

Alternatively, the first push block 2224 has the same structure as the second push block 2234, the first reset element 2223 has the same structure as the second reset element 2233, and the first positioning column 2222 has the same structure as the second positioning column 2232, so that the types of parts of the pull rod assembly 100 can be reduced to facilitate assembly.

Alternatively, the second push block 2234 may be disposed between a push rod member (not shown) disposed on the second housing 2231 and connected to the second push block 2234 and the button 2241, and the user pushes the second push block 2234 by pressing the button 2241 to push the second positioning column 2232 out of the fixing hole 22211.

The grip 224 is generally oval in shape and is detachably attached to an end of the second housing 2231 remote from the rotation shaft 221. The user may control the telescoping of the first and second sections 222, 223 and the movement of the trailer 200 by holding the grip 224. The rolling of the roller set 40 allows the trailer 200 to operate with low friction.

Referring to fig. 1, 9, 10 and 11, the roller set 40 includes a first roller 41, a second roller 42 and a main wheel 43 all disposed on the frame 30. The first roller 41 and the main wheel 43 form a first plane S1 at a portion for contacting the ground, and the second roller 42 and the main wheel 43 form a second plane S2 at a portion for contacting the ground, and the first plane S1 intersects the second plane S2.

The trailer 200 has a flat-lying posture, a vertical posture, and a tilted posture, the first roller 41 and the main wheel 43 are in contact with the ground when the trailer 200 is in the flat-lying posture, the second roller 42 and the main wheel 43 are in contact with the ground when the trailer 200 is in the vertical posture, and the main wheel 43 is in contact with the ground when the trailer 200 is in the tilted posture.

The user can change the posture of the trailer 200 according to the actual scene so as to pull the trailer 200. Specifically, the trailer 200 can be in a flat position on a road surface, the first roller 41 and the main wheel 43 are in contact with the ground, the center of gravity of the trailer 200 is low, and the trailer 200 is stable to move. When the environment is complex and the road surface is crowded, the trailer 200 may be disposed in a vertical posture so as to reduce the occupation space of the trailer 200 in the horizontal direction. When on an incline, the trailer 200 may be set to an inclined position to facilitate the user dragging the trailer 200.

The intersection of the first plane S1 and the second plane S2 is understood to mean that an included angle is formed between the first plane S1 and the second plane S2, and the included angle is not limited as long as the trailer 200 can be switched between a flat posture, a vertical posture, and a tilted posture. Optionally, the first plane S1 and the second plane S2 have an angle of 90 °.

The pull rod assembly 100 is disposed on the frame 30, and when the trailer 200 is in different postures, the pull rod assembly 100 can correspondingly extend, retract and rotate so as to adapt to the trailers 200 in different postures.

It should be noted that, the coordinate system is established by the position of the pull rod assembly 100, and when the trailer 200 is in different postures, the position of the pull rod assembly 100 will change correspondingly, and the coordinate system will also change correspondingly. For example, when the trailer 200 is in a flat-lying position, the upward direction is a Z-axis that is parallel to the plane formed by the X-axis and the Y-axis. When the trailer 200 is in the vertical position, the upward direction is parallel to the Y-axis direction.

As an example, when the trailer 200 is in the flat-lying posture, the pull rod assembly 100 is positioned at a low position, so that the grip portion 22 can be controlled to extend out of the housing 10, the limit post 2121 of the sliding seat 21 extends into the positioning hole 12, and the grip 224 of the grip portion 22 can be positioned obliquely above the frame 30 by relative rotation of the grip portion 22 and the sliding seat 21, so as to facilitate the gripping by a user.

When the trailer 200 is in the upright position or the diagonal position, the first section 222 of the grip 22 can be controlled to be at least partially positioned in the housing 10, so that the extending direction of the grip 22 is parallel to the X-axis, and the overall length of the pull rod assembly 100 can be adjusted to be suitable for the user by adjusting the relative positions of the first section 222 and the housing 10 and the relative positions of the second section 223 and the first section 222.

When the trailer 200 does not need to be moved, the first section 222 and the second section 223 can be retracted into the housing 10 so as to reduce the space occupied by the drawbar assembly 100. The pull rod assembly 100 can be adjusted to different positions according to different postures of the trailer 200, and the applicability is high.

Optionally, the number of the first rollers 41, the second rollers 42 and the main wheels 43 is two, so that the trailer 200 is in a flat or vertical posture with four positions contacting the ground, thereby increasing stability. The main wheel 43 is a straight running wheel, and ensures the stability of the trailer 200 in straight running. The first roller 41 and the second roller 42 are universal wheels to facilitate steering when the trailer 200 is moving. The diameters of the first roller 41 and the second roller 42 are the same, and the diameter of the main wheel 43 is larger than the diameters of the first roller 41 and the second roller 42.

Referring to fig. 12, 13 and 14, the frame 30 includes a mounting seat 31, a limiting bracket 32 and a supporting bracket 33. The spacing bracket 32 and the supporting bracket 33 are arranged on the mounting seat 31 at intervals, and the spacing direction of the spacing bracket 32 and the supporting bracket 33 is parallel to the first plane S1 and perpendicular to the second plane S2. The energy storage device 300 is placed on the mounting seat 31, and cooperates with the side, close to each other, of the supporting bracket 33 through the limiting bracket 32 to define the energy storage device 300.

Optionally, the energy storage device 300 is provided with a connection end 301 (as shown in fig. 12), and the connection end 301 faces the limit bracket 32. When the trailer 200 is in a flat-lying position, the connection end 301 is located on one side of the trailer 200, and can be used directly by a user. The connection end 301 is located at the upper end of the trailer 200 when the trailer 200 is in a vertical or inclined position, and can also be used directly by a user. Regardless of the attitude of trailer 200, the user may be facilitated to use connection end 301. Optionally, the connection terminal 301 is a socket and/or an interface, and the user may directly connect the electric device with the connection terminal 301, so that the energy storage device 300 supplies power to the electric device.

The first roller 41 and the two main wheels 43 are disposed on the mounting base 31, and the bottom surface of the mounting base 31 is parallel to the first plane S1. The second roller 42 is disposed on a side of the support bracket 33 facing away from the spacing bracket 32 such that the second roller 42 is capable of contacting the ground when the trailer 200 is in the vertical position. The housing 10 of the pull rod assembly 100 is disposed on the mounting seat 31 so as to increase the strength of the mounting seat 31.

Optionally, in some embodiments, the mount 31 includes an upper shell 311, a lower shell 312, a first beam 313, and a second beam 314. The upper case 311 and the lower case 312 cooperate to form an inner cavity, the first beam 313 is disposed in the inner cavity, and the two main wheels 43 are disposed at both ends of the first beam 313 along the Y-axis direction. The second beam 314 is disposed in the inner cavity and is spaced from the first beam 313 along the X-axis direction, and the first beam 313 and the second beam 314 are respectively connected to two ends of the housing 10 in the length direction, where the length direction of the housing 10 is parallel to the X-axis. Two first rollers 41 are disposed at opposite ends of the second beam 314. The upper case 311, the lower case 312, the first beam 313 and the second beam 314 are matched with each other to form a stable mounting seat 31, which has high structural strength and can stably place the energy storage device 300. The pull rod assembly 100 is disposed in the cavity, and one end of the pull rod assembly 100 is connected to the first beam 313 and the other end is connected to the second beam 314. The space occupied by the trailer 200 may be reduced and the tie rod assembly 100 may also increase the strength of the mount 31.

Optionally, the upper shell 311 and the lower shell 312 are installed along the direction perpendicular to the first plane S1, and since the mounting seat 31 is more subjected to pressure and force parallel to the direction of the first plane S1 during use, the mounting seat 31 is less likely to be subjected to tensile force in the direction of separating the upper shell 311 from the lower shell 312, so that the upper shell 311 and the lower shell 312 can be kept stable, and the occurrence of mutual separation is reduced.

The support bracket 33 includes two support rods 331 and a connecting rod 332, where the two support rods 331 are disposed on the upper shell 311 of the mounting seat 31 at intervals, and are detachably connected with the upper shell 311. The spacing direction of the two support bars 331 is parallel to the Y axis. The extending direction of the support rod 331 is perpendicular to the first plane S1. The second roller 42 is disposed on a side of the support rod 331 facing away from the limiting bracket 32. The support bracket 33 is generally U-shaped in shape and when the trailer 200 is in a flat-lying position, a user can push or pull the support bracket 33 in addition to pulling the trailer 200 through the pull rod assembly 100 to move the trailer 200. The support bar 331 and the link 332 are both capable of supporting the energy storage device 300 when the trailer 200 is in a tilted or vertical position to maintain the stability of the energy storage device 300. Optionally, the energy storage device 300 can at least partially cooperate with the support bracket 33 and extend into the area formed by the two support rods 331 and the connecting rod 332, so as to further strengthen the limitation of the energy storage device 300.

Optionally, in some embodiments, the frame 30 further includes positioning posts 34, where the positioning posts 34 are disposed on the mounting base 31, and the number of the positioning posts 34 may be two and correspond to the position of the support rod 331. One end of the support rod 331 can be engaged with the positioning column 34 to achieve positioning of the support rod 331. Specifically, the support rod 331 is hollow, and the inner diameter of the support rod 331 is adapted to the diameter of the positioning column 34, so that the support rod 331 can be sleeved on the positioning column 34 to position the support rod 331.

Optionally, in some embodiments, the trailer 200 further includes two fastening pieces 50, each fastening piece 50 includes a first mating portion 51 and a second mating portion 52, the first mating portion 51 is disposed on the support rod 331, the second mating portion 52 is disposed on the mounting seat 31, and the first mating portion 51 and the second mating portion 52 are detachably fastened. The first and second engaging portions 51 and 52 are used to detachably connect the support rod 331 to the mounting base 31. When the trailer 200 is received, the support bar 331 can be detached from the mount 31, thereby reducing the occupied space of the trailer 200. Alternatively, the first engaging portion 51 and the second engaging portion 52 are snap-fit with each other.

Optionally, in some embodiments, the support bracket 33 further includes a support plate 333, where the support plate 333 is disposed between the two support rods 331 and between the connecting rod 332 and the mounting base 31, and the support plate 333 can be directly contacted with the energy storage device 300. So that the energy storage device 300 can be more stably restrained when the trailer 200 is in the flat-laid posture. When the trailer 200 is in the vertical or inclined posture, the area supporting the energy storage device 300 is increased, thereby improving stability.

It is understood that the support bracket 33 is not limited to include two support rods 331 and a connecting rod 332, and in other embodiments, may include only two support rods 331 or only a rectangular plate.

The spacing bracket 32 comprises two spacing rods 321 and a cross rod 322, wherein the two spacing rods 321 are arranged on the mounting seat 31 at intervals and detachably connected with the mounting seat 31, and the spacing direction and the extending direction of the two spacing rods 321 are consistent with those of the supporting rod 331. One end of the cross rod 322 is connected with one end of the limiting rod 321 far away from the mounting seat 31, and the other end of the cross rod 322 is connected with one end of the other limiting rod 321 far away from the mounting seat 31. The energy storage device 300 is at least partially matched with the limit bracket 32 and can extend into the area formed by the two limit rods 321 and the cross bar 322 so as to keep the energy storage device 300 stable. Optionally, the shape of the limiting bracket 32 is consistent with the shape of the supporting bracket 33, and is symmetrically arranged.

Alternatively, in some embodiments, the number of the positioning posts 34 is four, two of which correspond to the two support rods 331 and the other two of which correspond to the two stop rods 321. The number of the snap fasteners 50 is four, two of which are used for corresponding to the two support rods 331, and the other two of which are corresponding to the two limit rods 321.

In summary, embodiments of the present application provide a drawbar assembly 100, a trailer 200, and a mobile energy storage device 400. The trailer 200 has different attitudes, and a user can control the trailer 200 to switch to a corresponding attitude according to circumstances, so that the user drags the trailer 200. When the trailer 200 is in different postures, the pull rod assembly 100 can correspondingly extend to different positions so as to adapt to the trailers 200 in different postures, so that different application scenes can be applied conveniently.

In addition, those of ordinary skill in the art will recognize that the above embodiments are presented for purposes of illustration only and are not intended to be limiting, and that suitable modifications and variations of the above embodiments are within the scope of the disclosure of the present application.

Claims (10)

1. A tie rod assembly comprising a housing and a tie rod, wherein the tie rod comprises:

The sliding seat comprises a main body and a limiting part, wherein the main body is arranged on the shell in a sliding manner, and the limiting part is connected with the main body in a sliding manner and is configured to be separated from the shell or limited on the shell;

the holding part is in sliding connection with the shell, one end of the holding part in the extending direction is rotationally connected with the main body, and the other end of the holding part in the extending direction is positioned outside the shell;

the holding part is configured to drive the limiting part to move when the extending direction of the holding part is parallel to the sliding direction of the main body so as to enable the limiting part to be separated from the shell, thereby releasing the limiting fit of the limiting part and the shell, and the limiting part is further configured to limit the limiting part to be positioned on the shell when the extending direction of the holding part is intersected with the sliding direction of the main body so as to limit the sliding of the main body.

2. The pull rod assembly of claim 1, wherein the housing is provided with a locating hole, and the limiting portion includes:

the limiting column is in sliding connection with the main body, and the sliding direction of the limiting column is perpendicular to the sliding direction of the main body;

An elastic member having one end in contact with the main body and the other end in contact with the stopper post, the elastic member being configured to push the stopper post to extend into the positioning hole when an extending direction of the grip portion intersects a sliding direction of the main body;

the pressing block is arranged on the main body in a sliding mode, the sliding direction of the pressing block is parallel to that of the main body, and when the extending direction of the holding part is parallel to that of the main body, the holding part pushes the pressing block to move towards the limiting column, so that the limiting column is separated from the positioning hole.

3. The pull rod assembly according to claim 2, wherein the limit post is provided with a first mating surface, the first mating surface is inclined toward the corresponding positioning hole from a direction approaching to a direction away from the grip portion, and the pressing block is provided with a second mating surface, and the second mating surface is in sliding contact with the first mating surface.

4. The tie rod assembly of claim 2 wherein the press block comprises:

the connecting rod is arranged on the main body in a sliding manner, extends along the sliding direction perpendicular to the main body, and pushes the connecting rod to move towards the limit column when the extending direction of the holding part is parallel to the sliding direction of the connecting rod;

The two compression bars are arranged at the two opposite ends of the connecting rod at intervals, and one end of each compression bar is contacted with one limit column.

5. The tie rod assembly of any one of claims 1 to 4 wherein the grip portion comprises:

the rotating shaft part is arranged on the shell in a sliding manner and is rotationally connected with the main body;

a first section slidably disposed in the housing and connected to the shaft portion;

the second section is arranged on the first section in a sliding manner, and the sliding direction of the second section is parallel to the sliding direction of the first section;

and the handle is connected with one end of the second section far away from the rotating shaft part.

6. The tie rod assembly of claim 5 wherein said housing is provided with a limiting aperture, said first section comprising:

a first housing slidably disposed to the housing;

the first positioning column is arranged on the first shell in a sliding manner, and the sliding direction of the first positioning column is perpendicular to the sliding direction of the first shell;

one end of the first reset piece is connected with the first shell, and the other end of the first reset piece is connected with the first positioning column so as to push the first positioning column to extend into the limiting hole;

The first pushing block is slidably arranged on the first shell, the sliding direction of the first pushing block is parallel to that of the first shell, and the first pushing block can move towards the first positioning column so as to push the first positioning column to be separated from the limiting hole.

7. The tie rod assembly of claim 6 wherein said first section is provided with a securing aperture and said second section includes:

a second housing slidably disposed at the first section, and having a sliding direction parallel to the first section;

the second positioning column is arranged on the second shell in a sliding manner, and the sliding direction of the second positioning column is perpendicular to the sliding direction of the first section;

one end of the second reset piece is connected with the second shell, and the other end of the second reset piece is connected with the second positioning column so as to push the second positioning column to extend into the fixing hole;

the second pushing block is slidably arranged on the second shell, the sliding direction of the second pushing block is parallel to that of the first section, and the second pushing block can move towards the second positioning column so as to push the second positioning column to be separated from the fixing hole.

8. A trailer comprising a frame for holding an energy storage device and a roller set disposed on the frame, wherein the trailer further comprises a tie rod assembly as claimed in any one of claims 1 to 7 disposed on the frame.

9. The trailer of claim 8, wherein the roller set comprises a first roller, a second roller, and a main wheel each disposed on the frame, the first roller and the main wheel forming a first plane at a portion for contacting the ground, the second roller and the main wheel forming a second plane at a portion for contacting the ground, the first plane intersecting the second plane;

the trailer has a flat-lying posture, a vertical posture and an inclined posture, when the trailer is in the flat-lying posture, the first roller and the main wheel are in contact with the ground, when the trailer is in the vertical posture, the second roller and the main wheel are in contact with the ground, and when the trailer is in the inclined posture, the main wheel is in contact with the ground.

10. A mobile energy storage device comprising an energy storage apparatus, wherein the mobile energy storage device further comprises a trailer as claimed in claim 8 or 9, the energy storage apparatus being provided to the frame of the trailer.