A buffer device for a tow vehicle and a tow vehicle set including the device

Abstract

The present invention discloses a buffer device for a towing vehicle, which includes a connecting sleeve and a buffer. Under the action of an external force, the buffer device can deform, thereby converting the kinetic energy generated at the moment when the towing trolley starts to move into elastic potential energy, reducing the impact force on the link at the connection of the towing trolley, and thus improving the impact resistance and service life of the towing unit. The present invention also provides a towing vehicle group, which includes at least two towing trolleys, at least two of the buffer devices, a connector and a steel wire rope. One buffer is connected to each end of the connector, the other end of the buffer is connected to a towing trolley, the steel wire rope penetrates through the entire towing vehicle group and is fixed at both ends of the tape storage bin rack. The connector is threaded through the steel wire rope through a lifting lug and can move freely in the direction of the steel wire rope. The structure of the present invention is simple, occupies little space, and is convenient for disassembly and assembly, solving the problem that the connector breaks due to the large force on the towing trolley at the moment of starting to move.

Description

Technical Field

[0001] The present invention relates to the technical field of towing vehicle groups, and in particular to a buffer device for a towing vehicle and a towing vehicle group including the device. Background Art

[0002] At present, in the gob-side extensible belt conveyor and the tunneling belt conveyor, especially in the large belt storage bin with a large number of stored belts and a long storage length, when the towing vehicle group moves, there is a large impact and it is easy to cause the ring chain to break. Usually, towing trolleys are used to carry the belt in the belt storage bin. Ideally, during the process of taking in and paying out the belt and tensioning, the ring chains between each towing trolley move orderly at a constant distance. However, in actual operation, due to sudden start-up and the deviation of the ring chain spacing, the ring chains connecting the towing trolleys in the towing trolley group are unevenly stressed. Especially at the moment when the trolley starts to move, the stress is extremely large, which easily leads to the breakage of the ring chain, not only affecting the production progress, but also posing a safety hazard. The present invention provides a buffer device for a towing vehicle, which has a simple structure, occupies a small space, and is convenient for disassembly and assembly, and solves the problem that the towing trolley is subjected to a large force at the moment of starting to walk, resulting in the breakage of the connector. Based on the applicant's technical disclosure and the existing technical problems, technical features and technical effects in the background art, the application technical solution of the present invention is made. Summary of the Invention

[0003] The object of the present invention is a buffer device for a towing vehicle.

[0004] The object of the present invention is a towing vehicle group.

[0005] To overcome the above technical drawbacks, on the one hand, the present invention provides a buffer device for a towing vehicle, which is beneficial to have a buffering effect at the moment when the towing trolley starts to walk, reduces the impact force on the chain link at the connection of the towing trolley, and thus improves the impact resistance and service life of the towing unit.

[0006] To achieve the above object, the technical solution adopted by the present invention is: to provide a buffer device for a towing vehicle, including a connecting sleeve and a buffer. The buffer can reciprocate linearly in the connecting sleeve under the action of an external force. The connecting sleeve is provided as a split structure, including a head sleeve and a tail sleeve detachably connected to the head sleeve.

[0007] Due to the design, the buffer device can deform under the action of an external force, thereby converting the kinetic energy generated at the moment when the towing trolley starts to walk into elastic potential energy, reducing the impact force on the chain link at the connection of the towing trolley, and thus improving the impact resistance and service life of the towing unit.

[0008] Preferably, the buffer includes a buckle connected to the outer side of the outer plate, a buffer shaft connected to the inner side of the outer plate, a clamping plate detachably connected to the end of the buffer shaft to limit the buffer member, a flange sleeved on the buffer shaft and movable back and forth on the buffer shaft, and a buffer member sleeved on the buffer shaft between the flange and the clamping plate. One end of the head sleeve is provided with a protruding annular clamping groove on the inner wall, and the other end is threadedly connected to the tail sleeve.

[0009] Among them, denote the inner wall diameter of the head sleeve as D1, the inner wall diameter of the tail sleeve as D2, the inner wall diameter of the annular clamping groove as D3, the outer diameter of the outer plate as D4, the outer diameter of the flange as D5, the inner diameter of the flange as D6, the outer diameter of the clamping plate as D7, and the diameter of the buffer shaft as D8.

[0010] Then, D1 = D2, D3 < D5 < D1, D4 > D3, D6 > D8, D8 < D7 < D2.

[0011] Preferably, the buffer member is a helical spring or a rubber sleeve and is sleeved on the buffer shaft.

[0012] Preferably, the connecting sleeve has an arc-shaped upper cover and an arc-shaped lower cover. The upper cover and the lower cover are buckled up and down and are respectively connected at the corresponding two ends. There is a cavity in the middle, and a buffer is arranged in the cavity. The buffer has a first buffer end and a second buffer end. The upper cover of the connecting sleeve, the first buffer end of the buffer, and the lower cover of the connecting sleeve are connected. The second buffer end of the buffer is set as a free end and is located in the cavity surrounded by the upper cover and the lower cover of the connecting sleeve.

[0013] Preferably, the buffer and the connecting sleeve are made of a stretchable spring sheet material. The upper cover and the lower cover of the connecting sleeve are made of spring sheet materials with the same shape and the same material.

[0014] Preferably, the elastic force generated by the bending of the upper cover spring sheet of the connecting sleeve is P1, the elastic force generated by the lower cover spring sheet of the connecting sleeve is P2, and the elastic force generated by the buffer due to the extrusion of the upper cover and the lower cover is P3. Then the relationship among the three needs to satisfy: (P 1 +P 2 ) / 2 < P 3 < 2(P 1 +P 2 ).

[0015] According to another aspect of the present invention, a towing vehicle group is provided. The towing vehicle group includes at least two towing cars, at least two buffer devices as described in any one of claims 1 - 7, a connector, and a steel wire rope. Both ends of the connector are respectively connected with a buffer, the other end of the buffer is connected with a towing car, the steel wire rope penetrates through the entire towing vehicle group and is fixed at both ends of the tape storage rack. The connector passes through the steel wire rope through a lifting lug and can move freely in the direction of the steel wire rope.

[0016] In this technical solution, the buffer device with a buffer and a connecting sleeve is an important technical feature. The buffer can reciprocate along the straight line where the external force is located within the connecting sleeve under the action of the external force. In the technical field of towing vehicle groups, it has novelty, creativity, and practicality. The terms in this technical solution can be explained and understood using the patent documents in this technical field. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] From the following detailed description in conjunction with the drawings, the above and other objects and advantages of the present invention will become more complete and clear, where the same elements are denoted by the same reference numerals.

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a front sectional view of the buffer device in the relaxed state of the first embodiment of the present invention;

[0020] Figure 3 is a front sectional view of the buffer device in the tensioned state of the first embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of the first position of the second embodiment in the present invention;

[0022] Figure 5 is a schematic diagram of the second position of the second embodiment in the present invention;

[0023] Reference numerals in the drawings: 1 - towing cart, 2 - buffer device, 3 - connector, 4 - steel wire rope, 5 - buckle

[0024] 21 connecting sleeve, 22 - buffer, 211 - head sleeve, 212 tail sleeve, 213 - annular card slot,

[0025] 221 - outer plate, 222 - buffer shaft, 223 - flange, 224 - clamping plate, 225 - buffer member,

[0026] Figure 4 and Figure 5 : 23 - connecting sleeve, 24 - buffer, 241 - first buffer end, 242 second buffer end

[0027] 231 - upper cover, 232 - lower cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] According to the examination guidelines, terms such as "having", "comprising", and "including" used in the present invention should be understood as not excluding the presence or addition of one or more other elements or their combinations.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. In addition, unless otherwise specified, the equipment and materials used in the following embodiments are commercially available. If there is no clear description of the processing conditions, please refer to the product manual purchased or follow the conventional methods in the art.

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0033] A buffer device for a towing vehicle Figure 1 This is a schematic diagram of the overall structure of the present invention. This embodiment will be specifically described in conjunction with the drawings. A buffer device 2 for a towing vehicle includes a connecting sleeve 21 and a buffer 22. The buffer 22 can reciprocate along the straight line where the external force is located within the connecting sleeve 21 under the action of an external force. The connecting sleeve 21 is provided as a split structure, including a head sleeve 211 and a tail sleeve 212 detachably connected to the head sleeve. Due to the design, the buffer device 2 can deform under the action of an external force, thereby converting the kinetic energy generated at the moment when the towing cart 1 starts to move into elastic potential energy, reducing the impact force on the chain link at the connection of the towing cart, and thus improving the impact resistance and service life of the towing unit.

[0034] In the first embodiment of the present invention, the structural functions of the two buffer devices are the same, only their positions in the entire towing vehicle group are different. Hereinafter, one of the buffer devices will be taken as an example for illustration.

[0035] In the first embodiment of the present invention, a latch 5 with a closable opening is provided at each of the two ends of the buffer device 2. One end of the first buffer device 2 is connected to the first towing cart 1 through the latch, and the other end is connected to the connector 3 through the latch. Its technical purpose is to achieve the detachable connection of the towing cart, the buffer device, and the connector, so as to facilitate the free combination into multiple groups of towing vehicle groups according to production needs.

[0036] In the first embodiment of the present invention, the buffer device 2 further includes a connecting sleeve 21 and a buffer 22. The buffer 22 can reciprocate along the straight line where the external force is located within the connecting sleeve 21 under the action of the external force. Its technical purpose is: by adopting the principle that the buffer can reciprocate under the action of the external force, it has a buffering effect at the moment when the towing cart starts, reducing the impact force on the chain link at the connection of the towing cart, thereby improving the impact resistance and service life of the towing unit.

[0037] In the first embodiment of the present invention, the connecting sleeve 21 is set as a split structure, including a head sleeve 211 and a tail sleeve 212 detachably connected to the head sleeve 211. The inner diameters of the head sleeve 211 and the tail sleeve 212 are equal; a latch is provided on the outer side of the tail sleeve 212, and a protruding annular groove 213 is provided on the inner wall of one end of the head sleeve 211, and the other end is threadedly connected to the tail sleeve 212. Its technical purpose is: through the split design of the connecting sleeve 21 and the equal inner diameter size, it is convenient to connect the head sleeve and the tail sleeve, and convenient to install the buffer 22 in the connecting sleeve to achieve the next step of connecting the buffer device to the towing cart.

[0038] In the first embodiment of the present invention, the buffer 22 includes a buckle 5 connected to the outer side of the outer plate, a buffer shaft 222 connected to the inner side of the outer plate 221, a clamping plate 224 detachably connected to the end of the buffer shaft 222 to limit the buffer member, a flange 223 sleeved on the buffer shaft 222 and capable of moving back and forth on the buffer shaft 222, and a buffer member 225 sleeved on the buffer shaft 222 between the flange 223 and the clamping plate 224. One end inner wall of the head sleeve 21 is provided with a protruding annular clamping groove 213, and the other end is threadedly connected to the tail sleeve 212. The buffer member 225 is a spiral spring or a rubber sleeve, sleeved on the buffer shaft 222. The outer diameter of the outer plate 221 is greater than the inner diameter of the annular clamping groove 213, and the outer diameter of the flange 223 is less than the inner diameter of the annular clamping groove 213. Its technical purpose is: when the buffer device is in a relaxed state, the outer plate 221 limits the position of the buffer shaft 222, and the buffer shaft 222 does not sink into the connection sleeve 21; when the buffer device is in a tensioned state, the position of the flange 223 is limited by the annular clamping groove 213, and the flange 223 and the clamping plate 224 jointly compress the buffer member 225 to achieve the buffering effect.

[0039] In the first embodiment of the present invention, denote the inner wall diameter of the head sleeve 211 as D1, the inner wall diameter of the tail sleeve 212 as D2, the inner wall diameter of the annular clamping groove 213 as D3, the outer diameter of the outer plate 221 as D4, the outer diameter of the flange 223 as D5, the inner diameter of the flange 223 as D6, the outer diameter of the clamping plate 224 as D7, and the diameter of the buffer shaft 222 as D8.

[0040] The following relationships are satisfied: D1 = D2, D3 < D5 < D1, D4 > D3, D6 > D8, D8 < D7 < D2.

[0041] Its technical purpose is: for the buffer 22 to be conveniently installed in the connection sleeve 21, when the buffer 22 deforms under an external force, as the external force changes, the buffer 22 can reciprocate along the straight line of the external force in the connection sleeve 21 to play a buffering role.

[0042] The following further describes the present invention in conjunction with embodiments. The following embodiments are intended to illustrate the present invention rather than further limit the present invention.

[0043] In the first embodiment of the present invention, a towing vehicle group, the steps are as follows: The first towing trolley 1 is connected to the buckle at one end of the first buffer device 2, and the other end of the first buffer device is connected to one end of the connector 3 through a buckle; the other end of the connector 3 is connected to the buckle at one end of the second buffer device 4; the other end of the second buffer device 4 is connected to the second towing trolley 5 through a buckle; the connector 3 is threaded through the steel wire rope 6 through a lug, and the steel wire rope 6 runs through the entire towing vehicle group and is fixed at both ends of the tape storage rack. Other towing trolleys and buffer devices can be connected according to the above method as needed to form a continuous towing vehicle group.

[0044] During use, when the towing cart is stationary, the buffer device is in the Figure 2 shown relaxed state. Taking the first buffer device 2 as an example, the buffer 22 is located in the connecting sleeve 21. The outer plate 221 is close to the outside of the head sleeve 211, preventing the buffer shaft 222 from falling into the connecting sleeve 21, and the spring buffer 225 is in a relaxed state.

[0045] When the towing cart starts, the buffer moves to the second position, and the buffer device is in the Figure 3 shown tensioned state. The flange 223 is close to the inside of the annular card slot 213, and the spring buffer 225 is in a tensioned state, converting the kinetic energy generated when the cart starts into elastic potential energy to play a buffering role.

[0046] In the second embodiment of the present invention, in the second embodiment, the structures and functions of multiple buffer devices 2 are the same, but their positions in the entire towing vehicle group are different. Here, one of the buffer devices 2 will be taken as an example for illustration.

[0047] In the second embodiment of the present invention, the connecting sleeve 23 has an arc-shaped upper cover 231 and an arc-shaped lower cover 232. The upper cover 231 and the lower cover 232 are connected corresponding to both ends in a snap-on manner, with a cavity in the middle. A buffer 24 is arranged in the cavity. The buffer 24 has a first buffer end 241 and a second buffer end 242. The upper cover 231 of the connecting sleeve 23, the first buffer end 241 of the buffer 24, and the lower cover 232 of the connecting sleeve are connected. The second buffer end 242 of the buffer 24 is set as a free end and is located in the cavity surrounded by the upper cover 231 and the lower cover 232 of the connecting sleeve 23. Its technical purpose is: to facilitate the installation of the buffer in the connecting sleeve, and the free end can reciprocate on the inner wall of the lower cover of the connecting sleeve under the action of an external force.

[0048] In this embodiment, the buffer 24 and the connecting sleeve 23 are made of stretchable spring sheet materials. The upper cover 231 and the lower cover 232 of the connecting sleeve 23 are made of spring sheet materials with the same shape and the same material, which is beneficial to the buffering effect achieved by the deformation of the buffer.

[0049] During use, when the towing cart is stationary, the buffer device is in the Figure 4 position. Note: The elastic force generated by the bending of the spring sheet of the upper cover 231 of the connecting sleeve 23 is P 1 , and the elastic force generated by the spring sheet of the lower cover 232 of the connecting sleeve 23 is P 2, the elastic force generated by the extrusion of the buffer 24 due to the upper cover 231 and the lower cover 232 is P3. Then the relationship among the three needs to satisfy: (P1 + P2) / 2 < P3 < 2(P1 + P2). In this embodiment, the connecting sleeve is made of 60Mn steel spring sheet, and the buffer is made of 65Mn steel spring sheet. Its technical purpose is: through material selection design, the supporting force of the buffer is large enough to effectively support the connecting sleeve. When the buffer moves from the second position to the first position, the buffer 22 can support the connecting sleeve 21 to return to the first position, completing the buffering activity.

[0050] The following further describes the present invention in combination with the second embodiment. The following embodiments are intended to illustrate the present invention rather than further limit the present invention.

[0051] According to another aspect of the present invention, the second embodiment of the present invention provides a towing vehicle group, which includes at least two towing cars 1, at least two buffer devices 2 described in the second embodiment, a connector 3, and a steel wire rope 4. A plurality of connections have a lock 5 with an opening and closing structure. One buffer 2 is connected to each end of the connection 3, and the other end of the buffer 2 is connected to a towing car 1. The steel wire rope 4 runs through the entire towing vehicle group and is fixed to both ends of the tape storage rack. The connector 3 is threaded through the steel wire rope through a lug and can move freely in the direction of the steel wire rope. Other towing cars and buffer devices can be connected according to the above method as needed to form a continuous towing vehicle group.

[0052] During use, when the towing car is stationary, the second buffer end of the buffer 24 is in the first position, and the buffer device 2 is in the Figure 4 shown state. Taking one buffer device 2 as an example, the buffer 24 is located in the connecting sleeve 23. The upper cover 231 of the connecting sleeve 23, the first buffer end 241 of the buffer 24, and the lower cover 231 of the connecting sleeve 23 are sequentially connected together to form a cavity. The buffer 24 is located in the cavity and is in a relaxed state without deformation.

[0053] When the towing car starts, the second buffer end 242 of the buffer 24 moves to the second position, and the buffer device 2 is in the Figure 5 shown state. Under the action of an external force, the connecting sleeve 23 deforms. The upper cover 231 and the lower cover 232 of the connecting sleeve 23 are both in a pulled-in state. The height of the formed cavity is lower than the Figure 4 height of the cavity in the relaxed state, and the radius of curvature of the upper cover 231 and the lower cover 232 is larger than the Figure 4 radius of curvature in the relaxed state. The second buffer end of the spring sheet buffer 24 moves to the second position, and the kinetic energy generated when the car starts is converted into elastic potential energy, playing a buffering role.

[0054] The structures of the connecting sleeves and buffers included in the buffer devices in the first embodiment and the second embodiment are different, but their functions are the same. The buffers can reciprocate within the connecting sleeves under the action of external forces to achieve the buffering function. The two buffer devices can be used alone or in combination.

[0055] The present invention has the following characteristics:

[0056] 1. Since a towing vehicle group with a buffer is designed, its structure is simple and effective, it occupies a small space, and it is convenient to disassemble and assemble.

[0057] 2. Since a towing vehicle group with a buffer device is designed, the buffer device can deform when subjected to external forces, convert kinetic energy into elastic potential energy, and has a buffering effect at the moment when the towing cart starts, reducing the impact force on the link at the connection of the towing cart, thus improving the impact resistance and service life of the towing unit.

[0058] 3. Since an opening and closing lock is designed, the detachable connection of the towing cart, the buffer device, and the connector is realized, which is convenient to freely combine into multiple groups of towing vehicle groups according to production needs.

[0059] 4. Since a split connection structure of the connecting sleeve is designed, it is convenient to install the buffer.

[0060] 5. Due to the design of the technical features of the present invention, and the combined effects of the technical features alone and with each other, through tests, the performance indicators of the present invention are at least 1.7 times that of the existing performance indicators, and it has good market value through evaluation.

[0061] There are also other buffer devices with buffers and connecting sleeves. The technical feature that the buffer can reciprocate linearly within the connecting sleeve along the line where the external force is located under the action of the external force is one of the embodiments of the present invention. And the technical features of the above-mentioned embodiments can be combined arbitrarily. To meet the requirements of the Patent Law, the Patent Implementation Regulations, and the Examination Guidelines, the embodiments of all possible combinations of the technical features in the above-mentioned embodiments will not be described one by one.

[0062] Therefore, in the technical field of towing vehicle groups with buffer devices, all technical contents that include buffer devices with buffers and connecting sleeves, and the buffer can reciprocate linearly within the connecting sleeve along the line where the external force is located under the action of the external force are within the protection scope of the present invention. The above-mentioned embodiments are only one implementation form of a buffer device for towing vehicles provided by the present invention. Other deformations of the solution provided by the present invention, adding or reducing components or steps therein, or applying the present invention to other technical fields close to the present invention all belong to the protection scope of the present invention.

Claims

1. A buffer device for a towing vehicle, Characterized in that: The buffer device includes a connecting sleeve and a buffer. The buffer can reciprocate linearly in the connecting sleeve along the line where the external force is located under the action of the external force; the connecting sleeve has an arc-shaped upper cover and an arc-shaped lower cover. The upper cover and the lower cover are buckled up and down and are respectively connected at the corresponding two ends, with a cavity in the middle. A buffer is arranged in the cavity. The buffer has a first buffer end and a second buffer end. The upper cover of the connecting sleeve, the first buffer end of the buffer, and the lower cover of the connecting sleeve are connected. The second buffer end of the buffer is set as a free end and is located in the cavity surrounded by the upper cover and the lower cover of the connecting sleeve. The buffer and the connecting sleeve are made of a stretchable spring sheet material.

2. A buffer device for a towing vehicle according to claim 1, Characterized in that: When the towing vehicle is stationary, the elastic force generated by the bending of the spring sheet of the upper cover of the connecting sleeve is P1, the elastic force generated by the spring sheet of the lower cover of the connecting sleeve is P2, and the elastic force generated by the buffer due to the extrusion of the upper cover and the lower cover is P3. Then the relationship among the three needs to satisfy: (P1 + P2) / 2 < P3 < 2(P1 + P2).

3. A towing vehicle group, Characterized in that: It includes at least two towing cars, at least two buffer devices as described in any one of claims 1-2, a connector, and a steel wire rope. One buffer device is respectively connected to both ends of the connector. The other end of the buffer device is connected to a towing car. The steel wire rope passes through the entire towing car group and is fixed at both ends of the tape storage bin rack. The connector is threaded through the steel wire rope through a lifting lug and can move freely in the direction of the steel wire rope.

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