CN219078250U - Transmission trolley device and multi-trolley safe transmission system - Google Patents

Abstract

The utility model relates to a transmission trolley device and a multi-trolley safe transmission system, wherein the transmission trolley device comprises a front trolley and a rear trolley which are connected into a whole, a stop piece is fixedly connected to the rear part of the rear trolley, the stop piece comprises a slope part which is obliquely arranged along the transmission direction, and the front end of the slope part is higher than the rear end of the slope part; the thrust conducting piece is positioned at the front part of the front trolley and is a rigid integral piece and comprises a force transmission part, a body and a counterweight part; the counterweight part is positioned at the front part of the thrust conducting piece, and the main body of the counterweight part is exposed in front of the front trolley; the body is positioned between the force transmission part and the counterweight part, and is hinged with the front trolley through a hinged connection part; the force transmission part is positioned at the rear side of the hinged connection part, and can be contacted with an external thrust providing element to receive thrust in the transmission working state of the transmission trolley device, and the front end of the counterweight part is higher than the lowest part of the slope part and lower than the highest part of the slope part. The utility model can safely and nondestructively transfer the workpiece, and has simple structure and high reliability.

Description

Transmission trolley device and multi-trolley safe transmission system

Technical Field

The utility model relates to the field of transmission lines for workpieces, in particular to a transmission trolley device and a multi-trolley safety transmission system.

Background

In the assembly line operation in the prior art, the multipurpose conveying device with the trolley conveys workpieces to be processed to processing operation positions, and all the workpieces are expected to sequentially and safely reach the corresponding processing operation positions, so that two conveying devices carrying one of the front workpiece and the rear workpiece on the assembly line can meet the requirements of safety and collision avoidance; further, on the premise of meeting the requirement, the structure is simple and the manufacturing is convenient; meanwhile, the device has high reliability, and the situation that if one of the components in the transmission device fails and the whole normal operation is influenced is avoided. However, the prior art does not see the technical proposal which can simultaneously meet the requirements.

Disclosure of Invention

Based on the above-mentioned current situation, the main object of the present utility model is to provide a transfer trolley device and a multi-trolley safety transfer system, which can meet the requirement of safely and nondestructively transferring workpieces in the pipeline operation, and has the advantages of simple structure, convenient manufacture and high reliability.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

in a first aspect, the present utility model provides a transfer trolley apparatus comprising a front trolley and a rear trolley, the front trolley being directly or indirectly connected to the rear trolley as a unit;

the device also comprises a stop piece and a thrust conducting piece;

the stop piece is positioned at the rear part of the rear trolley and is fixedly connected with the rear trolley, the stop piece comprises a slope part, the slope part is obliquely arranged along the transmission direction of the transmission trolley, and the front end of the slope part is higher than the rear end of the slope part;

the thrust conducting piece is positioned at the front part of the front trolley and is a rigid integral piece and comprises a force transmission part, a body and a counterweight part; the counterweight part is positioned at the front part of the thrust conducting piece, and the main body of the counterweight part is exposed in front of the front trolley; the body is positioned between the force transmission part and the counterweight part, a hinged connection part is arranged on the body, and the body is hinged with the front trolley through the hinged connection part; the force transmission part is positioned at the rear side of the hinged connection part, and in the transmission working state of the transmission trolley device, the force transmission part protrudes upwards above the front trolley under the action of the counterweight part and is used for being contacted with an external thrust providing element to receive thrust;

in the transmission working state, the front end of the counterweight part is higher than the lowest position of the slope part and lower than the highest position of the slope part.

Preferably, a stopper mounting part is provided at the rear upper part of the rear trolley, at least a part of the outer contour surface of the stopper mounting part is a slope section matched with the slope part, and the slope part is fixedly mounted on the slope section.

Preferably, the stopper mounting part comprises two mounting pieces oppositely arranged in a horizontal direction, the front end of each mounting piece is integrally connected with the main body of the rear trolley, the upper surface of the rear end part of each mounting piece comprises the slope section, and each slope section is provided with a clamping joint; the slope portion is equipped with the joint groove with every the position that the joint corresponds, the slope portion is through joint groove and joint's cooperation fixed mounting is in on the slope section.

Preferably, the upper surface of each of the mounting tabs further comprises a planar section, and the planar section is closer to the body of the rear trolley than the ramp section; the stop also includes a planar portion that rides over the planar segment.

Preferably, a rolling wheel rolling along the conveying direction is arranged at the front end of the weight part.

Preferably, the body is located at an intermediate position of the front trolley in a horizontal direction perpendicular to the transport direction;

the force transmission part is symmetrically arranged relative to the body, the force transmission part is cuboid or cuboid-like, the longest side of the cuboid or cuboid-like is parallel to the horizontal direction, and one surface of the force transmission part is used for being contacted with the thrust providing element.

Preferably, the body is located at an intermediate position of the front trolley in a horizontal direction perpendicular to the transport direction;

the counterweight part comprises two symmetrically arranged counterweights, and the two counterweights are symmetrically arranged relative to the body.

Preferably, a limit hook is arranged at the rear end of the thrust conducting piece, a limit shaft is arranged at the corresponding position of the front trolley, and in the transmission working state, the limit hook is hooked on the limit shaft and is limited by the limit shaft to move upwards.

In a second aspect, the present utility model provides a multi-trolley safety transfer system for suspending a transfer item by a transfer trolley apparatus, comprising a traction system, a plurality of thrust providing elements, a travelling rail and a plurality of transfer trolley apparatuses as described above;

the traction system is capable of driving the plurality of thrust providing elements to move;

the front trolley and the rear trolley can move along the travelling guide rail;

when the counterweight part of the latter transfer trolley device is in contact with the stop piece of the former transfer trolley device, the counterweight part can ascend along the slope part of the stop piece, drive the body to rotate along the hinged connection part and then drive the force transmission part to descend, and the counterweight part is separated from direct contact with the corresponding thrust providing element, so that the latter transfer trolley device is changed into a safe static shutdown state from the transfer working state.

Preferably, the total number of the thrust providing elements is greater than or equal to the total number of the transfer trolley devices.

According to the technical scheme provided by the utility model, when the front and rear conveying trolley devices meet, the counterweight part of the rear conveying trolley device can climb along the slope part of the stopper of the front conveying trolley device, at this time, the body of the rear conveying trolley device rotates around the hinged connection part under the driving action of the climbing drive of the counterweight part, so that the body moves downwards, the force transmission part of the rear conveying trolley device is driven to move downwards and separated from the corresponding external thrust providing element, the external thrust providing element cannot continuously push the rear conveying trolley device to continuously transmit forwards, and the violent collision accident of the rear conveying trolley device and the front conveying trolley device is effectively avoided; and when the front transmission trolley device leaves, the stop piece of the front transmission trolley device is separated from the counterweight part of the rear transmission trolley device, the stop function of the rear transmission trolley device is not played any more, the counterweight part of the rear transmission trolley device can automatically move downwards under the drive of dead weight, the force transmission part is driven to reset to a position capable of being in direct contact with an external thrust providing element, and the rear transmission trolley device regains power and can continuously and normally transmit forwards. The technical scheme of the utility model has the technical effects of simple integral structure, convenience in manufacturing and high reliability.

Other advantages of the present utility model will be set forth in the description of specific technical features and solutions, by which those skilled in the art should understand the advantages that the technical features and solutions bring.

Drawings

Preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. In the figure:

fig. 1 is a schematic perspective view of a preferred embodiment of a transfer cart device according to the present utility model;

FIG. 2 is a schematic perspective view of a preferred embodiment of a thrust runner according to the present utility model;

FIG. 3 is a schematic diagram showing a second perspective view of a preferred embodiment of the thrust conducting piece according to the present utility model;

FIG. 4 is a schematic perspective view of a preferred embodiment of a stopper according to the present utility model;

FIG. 5 is a schematic perspective view of a preferred embodiment of a rear cart according to the present utility model;

fig. 6 is a schematic diagram of a preferred embodiment of a multi-cart safety transfer system (only one of which is shown) provided by the present utility model.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name	Reference numerals	Name of the name
						100	Transmission trolley device	1222	Plane section	134	Limiting hook
110	Front trolley	130	Thrust conducting piece	140	Stop piece
						111	Limiting shaft	131	Force transmission part	1401	Slope part
120	Rear trolley	132	Body	1403	Clamping groove
						121	Stopper mounting portion	1321	Hinge connection	1402	Plane part
122	Mounting sheet	133	Counterweight part	200	Chain guide
						1221	Slope section	1331	Rolling wheel	300	Driving guide rail
1223	Clamping connector	1332	Balancing weight

Detailed Description

The present utility model is described below based on examples, but the present utility model is not limited to only these examples. In the following detailed description of the present utility model, certain specific details are set forth in order to avoid obscuring the present utility model, and in order to avoid obscuring the present utility model, well-known methods, procedures, flows, and components are not presented in detail.

Moreover, those of ordinary skill in the art will appreciate that the drawings are provided herein for illustrative purposes and that the drawings are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the present utility model, the direction of travel of the transport cart device is referred to as "front".

1-5, the present utility model provides a transfer trolley apparatus 100 comprising a front trolley 110 and a rear trolley 120, the front trolley 110 being directly or indirectly connected to the rear trolley 120 as a unit;

also included are stop 140 and thrust runner 130;

the stopper 140 is located at the rear part of the rear trolley 120 and is fixedly connected with the rear trolley 120, the stopper 140 includes a slope part 1401, the slope part 1401 is obliquely arranged along the conveying direction of the conveying trolley, and the front end of the slope part 1401 is higher than the rear end of the slope part;

the thrust conducting piece 130 is located at the front part of the front trolley 110, is a rigid integral piece, and comprises a force transmission part 131, a body 132 and a counterweight part 133; the weight part 133 is located at the front of the thrust conducting piece 130, and the main body of the weight part 133 is exposed in front of the front trolley 110; the body 132 is located between the force transmission portion 131 and the counterweight portion 133, a hinge connection portion 1321 is provided on the body 132, and the body 132 and the front trolley 110 are hinged through the hinge connection portion 1321; the force transmission part 131 is located at the rear side of the hinge connection part 1321, and in the transmission operating state of the transmission trolley device 100, the force transmission part 131 protrudes upward above the front trolley under the action of the weight part 133, and is used for contacting with an external thrust providing element to transmit thrust;

in the transfer operation state, the front end of the weight portion 133 is higher than the lowest position of the slope portion 1401 and higher than the highest position of the slope portion 1401.

The transfer cart device 100 of the present utility model can enable the front cart 110 and the rear cart 120 to be transferred forward on the cart guide rail, so as to drive the articles (e.g. the workpiece to be processed) carried by the carts to be transferred forward to a predetermined position (e.g. a position where the workpiece is painted, a position where the workpiece is subjected to performance test, etc.).

The power of the forward travel of the transfer trolley device 100 to drive the front trolley 110 and the rear trolley 120 comes from an external thrust providing element, which in one embodiment is a pusher driven by an external traction system (e.g., a chain traveling on a chain guide). The thrust providing member is in contact with the transfer cart device 100 to push the transfer cart device forward.

In the transfer cart device 100, the member that contacts the external thrust providing element and receives the thrust is a thrust conduction member 130. To improve ease of design, manufacturing, and assembly with other components, the thrust runner 130 is formed as a unitary component that is a rigid, unitary piece. Thus, the thrust runner of the present utility model is less likely to be damaged and has high reliability, compared to a thrust runner in which each component is manufactured independently and assembled by a complicated assembly structure.

The thrust guide 130 is located at the front of the front trolley 110, and the force transmitting part 131 directly contacts with an external thrust providing element to receive thrust when the transfer trolley device 100 is transferred forward. The body 132 integrally connected with the force transmission portion 131 is hinged with the front trolley 110 through the hinge connection portion 1321 located on the body 132 and the hinge shaft at the corresponding position of the front trolley, so that when the state of the hinge is limited (the body is not rotated around the hinge due to external thrust), the thrust provided by the external thrust providing element passes through the force transmission portion 131 and the body 132 in sequence to reach the front trolley 110, the front trolley 110 obtains forward power, and the front trolley 110 can drive the rear trolley 120 to advance due to the connection relationship between the front trolley 110 and the rear trolley 120, so that under the condition that the external thrust providing element provides thrust, the front trolley 110 and the rear trolley 120 of the transmission trolley device 100 can both move forward, so that the transmission trolley device 100 is in a normal transmission working state. The connection relationship between the front trolley 100 and the rear trolley 120 may be a direct connection or an indirect connection, and the indirect connection is realized, for example, that the front trolley is directly connected with a fixing device of a workpiece to be processed, and the rear trolley is also directly connected with the fixing device, so that the front trolley and the rear trolley are indirectly connected into a whole.

The weight 133 is located at the front of the thrust conductive piece 130, and the body of the weight 133 is exposed in front of the front trolley 110, so that the movement of the body of the weight 133 is not significantly restricted by the front trolley 110. The weight of the weight part 133 is relatively large, and the force transmission part 131 protrudes upward above the front trolley under the action of the weight part 133 in the transmission operating state of the transmission trolley device 100 so as to be capable of contacting with an external thrust providing element to receive thrust; the weight part 133 can also drive the body 132 downward to rotate around the hinge by its own weight when the necessity (which will be described later) occurs, thereby further driving the force transmission part 131 to rotate and reset to a position where it can be in direct contact with an external thrust providing element, so that the transfer trolley device 100 is restored to a normal transfer operation state.

A stopper 140 is provided at the rear of the rear cart 120, and when the front and rear transfer cart devices 100 meet (for example, when the front transfer cart device 100 stays at a certain processing position of a workpiece and waits for completion of the processing of the workpiece, the rear transfer cart device 100 is also transferred to the processing position), the front transfer cart device 100 can be gently stopped by the stopper 140 in order to avoid a serious collision and damage to the transfer cart device 100 and/or the transferred workpiece.

The stopper 140 includes a slope portion 1401, the slope portion 1401 being disposed obliquely along the conveying direction, and having a front end higher than a rear end, i.e., being higher front and lower rear. The front end of the weight 133 is higher than the lowest position of the slope 1401 (the lowest position of the foremost part of the weight is higher than the lowest position of the slope 1401) and lower than the highest position of the slope 1401, so that when the front and rear two transporting trolley devices 100 meet, the weight 133 of the rear transporting trolley device 100 can climb along the slope 1401 of the stopper 140 of the front transporting trolley device 100, at this time, the body 132 of the rear transporting trolley device 100 rotates around the hinged connection part 1321 under the climbing driving action of the weight 133, so that the body 132 moves downward, thereby driving the force transmitting part 131 of the rear transporting trolley device to also move downward, and disengage from the corresponding external thrust providing element, the external thrust can not act on the force transmitting part 131 any more, and the rear transporting trolley device 100 can not be pushed forward, thereby effectively avoiding the violent collision accident between the rear transporting trolley device 100 and the front transporting trolley device 100.

When the preceding transfer cart device 100 has been moved away, and it is necessary for the following transfer cart device 100 to return to the normal transfer operation state (i.e., when the above-mentioned necessity occurs), since the preceding transfer cart device 100 has been moved away, the stopper 140 of the preceding transfer cart device 100 is separated from the weight portion 133 of the following transfer cart device 100, and no longer plays a role of stopping the following transfer cart device 100, the weight portion 133 of the following transfer cart device 100 automatically moves downward under the self-weight driving, and the force transmitting portion 131 is driven to return to a position capable of directly contacting with the external thrust providing member, and the following transfer cart device 100 is able to resume the pushing force, and forward normal transfer can be continued.

Preferably, a stopper mounting part 121 is provided at a rear upper part of the rear cart 120, at least a part of an outer contour surface of the stopper mounting part 121 is a slope section 1221 matched with the slope section 1401, and the slope section 1401 is fixedly mounted on the slope section 1221.

Specifically, the stopper 140 is fixedly mounted on the stopper mounting part 121 at the rear upper part of the rear cart 120, and the manner of the fixed mounting is not limited, and may be a snap-fit, a screw connection, or the like.

Preferably, the stopper mounting part 121 includes two mounting pieces 122 disposed opposite to each other in a horizontal direction, a front end of each mounting piece 122 is integrally connected with a body of the rear cart 120, an upper surface of a rear end portion of each mounting piece 122 includes the slope sections 1221, and a snap fitting 1223 is provided on each slope section 1221; the slope portion 1401 is provided with a clamping groove 1403 at a position corresponding to each clamping connector 1223, and the slope portion 1401 is fixedly mounted on the slope section 1221 through the matching of the clamping groove 1403 and the clamping connectors 1223.

Specifically, the mounting plate 122 and the main body of the rear cart 120 may be integrally formed with each other, or may be separately formed and then fixedly connected to each other. Through the cooperation structure of the snap fit between the snap fit grooves 1403 corresponding to the ramp portions 1401 and the snap fit joints 1223 on each ramp portion 1221, the stopper 140 can be simply and conveniently fixedly assembled on the stopper mounting portion 121, so that the assembly efficiency is improved, a lot of assembly members are not required, and the reliability is higher.

Preferably, the upper surface of each of the mounting plates 122 further includes a planar section 1222, and the planar section 1222 is closer to the body of the rear cart 120 than the ramp section 1221; the stop 140 further includes a planar portion 1402, the planar portion 1402 riding on top of the planar segment 1222.

Preferably, a rolling wheel 1331 rolling in the conveying direction is provided at the front end of the weight portion 133.

Specifically, by the design of the rolling wheel 1331, when the rear transfer cart device 100 meets the front transfer cart device 100, the counterweight 133 can climb smoothly along the stopper 140, so that friction resistance in the climbing process can be reduced, the rear transfer cart device 100 can drive the force transmission portion 131 to be separated from the external thrust providing element as soon as possible due to the climbing of the counterweight 133, and the rear transfer cart device 100 can stop the forward transfer as soon as possible.

By providing the flat surface sections 1222 on the upper surfaces of the two mounting pieces 122 of the stopper mounting portion 121, and designing the stopper 140 to include the flat surface section 1402 that can be placed on the flat surface sections 1222, when each of the transportation cart devices 100 is put in storage in order after the operation is completed, each of the rolling wheels 1331 at the front end of each of the weight sections 133 is stably stopped on the flat surface section 1402 of the stopper 140 of the preceding transportation cart device 100 after the rolling wheels 1331 climb along the stopper 140 to reach the flat surface section 1402 via the slope section 1401, and each of the rolling wheels 1331 is stably stopped on the slope section 1401 of the stopper 140 of the preceding transportation cart device 100, whereby the transportation cart devices 100 on the assembly line can be stably positioned and the storage can be smoothly and stably completed.

Preferably, the body 132 is located at an intermediate position of the front cart in a horizontal direction perpendicular to the transport direction; the force transmission portion 131 is symmetrically arranged relative to the main body 132, the force transmission portion 131 is a cuboid or cuboid-like body, the longest side of the cuboid or cuboid-like body is parallel to the horizontal direction, and a surface of the force transmission portion is used for contacting with the thrust providing element.

By designing as above, when the side of the thrust providing element opposite to the force transfer part is also plane, the force transfer part 131 and the thrust providing element can be in surface contact (instead of point contact or line contact), so that the thrust provided by the thrust providing element is provided to the force transfer part 131 more fully and uniformly. The surface of the force transmission portion 131 on which the longest side is located is used to contact the thrust providing element, so that the contact area between the force transmission portion 131 and the thrust providing element can be increased compared with the case that the surface of the longest side is not used to contact the thrust providing element, and particularly, under special requirements (for example, when the thrust providing element is required to be arranged at the left side or the right side of the force transmission portion rather than the right side), the thrust providing element can be made to contact the force transmission portion 131 as fully as possible, and a new set of new specifications of thrust conductors can be avoided as much as possible.

Preferably, the body 132 is located at an intermediate position of the front cart in a horizontal direction perpendicular to the transport direction; the weight portion 133 includes two symmetrically disposed weights 1332, and the two weights 1332 are symmetrically disposed with respect to the body 132.

Through the symmetrical design, the weight part 133 can be conveniently manufactured, the stress and the movement form change condition of the weight part and even the whole thrust conducting piece can be conveniently estimated and analyzed, and the calculation workload in the design and simulation process of the transmission trolley device is reduced.

Preferably, a limit hook 134 is disposed at the rear end of the thrust conducting member 130, a limit shaft 111 is disposed at a corresponding position of the front trolley 110, and in the transmission working state, the limit hook 134 is hooked on the limit shaft 111, and is limited by the limit shaft 111 to move upwards.

By the above design of the stopper hook 134 and the stopper shaft 111, the movement of the weight portion 133 can be restricted. Specifically, when the previous transport cart device 100 moves forward, such that the stopper 140 is separated from the weight portion 133 of the subsequent transport cart device 100, the weight portion 133 moves downward under the action of dead weight, and drives the body 132 to rotate along the hinged connection portion 1321, and then drives the force transfer portion 131 to reset, due to the cooperation design of the limit hook 134 and the limit shaft 111, when the force transfer portion 131 resets to contact with the corresponding external thrust providing element, the limit hook 134 just hooks the limit shaft 111, the rotation state of the thrust conduction member 130 is limited and stopped, so that the force transfer portion 131 is not separated from the external thrust conduction element again due to excessive rotation, and the thrust of the thrust conduction element can be effectively ensured to continuously act on the force transfer portion, so that the transport cart device is pushed to continuously and smoothly forward.

In a second aspect, and referring to fig. 1-6, the present utility model also provides a multi-trolley safety transfer system for suspending a transfer object (e.g., a workpiece to be processed) by a transfer trolley apparatus, comprising a traction system, a plurality of thrust providing elements (not shown), a travelling rail 300, and a plurality of transfer trolley apparatuses 100 as described above;

the traction system is capable of driving the plurality of thrust providing elements to move;

the front trolley 110 and the rear trolley 120 are movable along the travelling guide 300;

when the weight portion 133 of the latter transfer cart device 100 contacts the stopper 140 of the former transfer cart device 100, the weight portion 133 can ascend along the slope portion 1401 of the stopper 140, drive the body 132 to rotate along the hinge connection portion 1321, and then drive the force transmission portion 131 to descend, and break from direct contact with the corresponding thrust providing element, so that the latter transfer cart device 100 is changed from the transfer operation state to a safe stationary shutdown state.

Referring to fig. 6, the traction system is, for example, a chain traction system including a chain guide 200 and a chain (not shown in fig. 6). Typically, the chain guide 200 is disposed parallel to the running guide 300, and the chain guide 200 is located at the upper portion of the running guide 300. The chain runs along the chain guide 200, which brings along a plurality of thrust providing elements (not shown in fig. 6) moving forward in the direction of extension of the chain guide 200, which thrust providing elements, when in contact with the force transmission portion 131 of one transfer trolley device 100, provide thrust to the transfer trolley device 100 such that it can move forward in the direction of extension of the travelling guide 300.

Preferably, the total number of the thrust providing elements is greater than or equal to the total number of the transfer trolley devices 100.

In this way, each transfer cart device 100 can be given an opportunity to contact with the thrust providing element to obtain thrust without undesirably staying on the pipeline due to unpowered provision, resulting in an influence on normal smooth operation of the entire pipeline.

Those skilled in the art will appreciate that the above-described preferred embodiments can be freely combined and stacked without conflict.

It will be understood that the above-described embodiments are merely illustrative and not restrictive, and that all obvious or equivalent modifications and substitutions to the details given above may be made by those skilled in the art without departing from the underlying principles of the utility model, are intended to be included within the scope of the appended claims.

Claims (10)

1. A transfer trolley device (100) comprising a front trolley (110) and a rear trolley (120), the front trolley (110) being directly or indirectly connected to the rear trolley (120) as a unit;

characterized by further comprising a stop member (140) and a thrust conducting member (130);

the stop piece (140) is positioned at the rear part of the rear trolley (120) and is fixedly connected with the rear trolley (120), the stop piece (140) comprises a slope part (1401), the slope part (1401) is obliquely arranged along the transmission direction of the transmission trolley, and the front end of the slope part is higher than the rear end of the slope part;

the thrust conducting piece (130) is positioned at the front part of the front trolley (110) and is a rigid integral piece and comprises a force transmission part (131), a body (132) and a counterweight part (133); the weight part (133) is positioned at the front part of the thrust conducting piece (130), and the main body of the weight part (133) is exposed in front of the front trolley (110); the body (132) is positioned between the force transmission part (131) and the counterweight part (133), a hinged connection part (1321) is arranged on the body (132), and the body (132) is hinged with the front trolley (110) through the hinged connection part (1321); the force transmission part (131) is positioned at the rear side of the hinged connection part (1321), and in the transmission working state of the transmission trolley device (100), the force transmission part (131) protrudes upwards above the front trolley under the action of the counterweight part (133) and is used for being contacted with an external thrust providing element to receive thrust;

in the transmission operating state, the front end of the weight portion (133) is higher than the lowest position of the slope portion (1401) and lower than the highest position of the slope portion (1401).

2. The transfer trolley device (100) according to claim 1, characterized in that a rear upper portion of the rear trolley (120) is provided with a stopper mounting portion (121), at least a part of an outer contour surface of the stopper mounting portion (121) is a slope section (1221) that matches the slope section (1401), and the slope section (1401) is fixedly mounted on the slope section (1221).

3. The transfer cart device (100) according to claim 2, wherein the stopper mounting portion (121) includes two mounting pieces (122) disposed opposite to each other in a horizontal direction, a front end of each of the mounting pieces (122) is integrally connected with a main body of the rear cart (120), an upper surface of a rear end portion of each of the mounting pieces (122) includes the slope sections (1221), and a snap joint (1223) is provided on each of the slope sections (1221); the slope part (1401) is provided with a clamping groove (1403) at a position corresponding to each clamping joint (1223), and the slope part (1401) is fixedly installed on the slope section (1221) through the matching of the clamping grooves (1403) and the clamping joints (1223).

4. The transfer trolley device (100) of claim 3, wherein the upper surface of each mounting tab (122) further comprises a planar section (1222), and the planar section (1222) is closer to the body of the rear trolley (120) than the ramp section (1221); the stop (140) further includes a planar portion (1402), the planar portion (1402) riding over the planar segment (1222).

5. The transfer cart device (100) according to claim 4, wherein a front end of the weight portion (133) is provided with a rolling wheel (1331) that rolls in the transfer direction.

6. The transfer trolley device (100) according to claim 1, characterized in that the body (132) is located in a middle position of the front trolley (110) in a horizontal direction perpendicular to the transfer direction;

the force transmission part (131) is symmetrically arranged relative to the body (132), the force transmission part (131) is a cuboid or a cuboid-like body, the longest side of the cuboid or the cuboid-like body is parallel to the horizontal direction, and one surface of the cuboid or the cuboid-like body is used for being contacted with the thrust providing element.

7. The transfer trolley device (100) according to claim 1, characterized in that the body (132) is located in a middle position of the front trolley (110) in a horizontal direction perpendicular to the transfer direction;

the counterweight part (133) comprises two symmetrically arranged counterweights (1332), and the two counterweights (1332) are symmetrically arranged relative to the body (132).

8. The transfer trolley device (100) according to any one of claims 1 to 7, wherein a limit hook (134) is provided at a rear end of the thrust conducting member (130), a limit shaft (111) is provided at a corresponding position of the front trolley (110), and in the transfer operation state, the limit hook (134) is hooked on the limit shaft (111) and is limited by the limit shaft (111) to move upward.

9. A multi-trolley safety transfer system for hanging transfer objects by means of a transfer trolley device, characterized by comprising a traction system, a plurality of thrust providing elements, a travelling rail (300) and a number of transfer trolley devices (100) according to any one of claims 1-8;

the traction system is capable of driving the plurality of thrust providing elements to move;

-the front trolley (110) and the rear trolley (120) are movable along the travelling guide rail (300);

when the weight part (133) of the latter transfer trolley device (100) is in contact with the stopper (140) of the former transfer trolley device (100), the weight part (133) can ascend along the slope part (1401) of the stopper (140), drive the body (132) to rotate along the hinged connection part (1321) and then drive the force transmission part (131) to descend, and break away from direct contact with the corresponding thrust providing element, so that the latter transfer trolley device (100) is changed from the transfer working state to a safe static shutdown state.

10. The multi-cart safety transmission system according to claim 9, wherein the total number of thrust providing elements is greater than or equal to the total number of transmission cart devices (100).

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