CN220907082U - Arm support structure, fire-fighting vehicle and engineering vehicle - Google Patents

Abstract

The utility model provides a boom structure, a fire-fighting vehicle and an engineering vehicle, wherein the boom structure comprises: a first arm support; the second arm support is rotationally connected with the first arm support, and can rotate in a first plane relative to the first arm support, and comprises: the first arm joint is rotationally connected with the first arm support; the second arm section is rotationally connected with the first arm section through a spiral swinging structure, and can rotate in a second plane relative to the first arm section through the spiral swinging structure, and the second plane is not overlapped with the first plane. In the technical scheme of the utility model, the spiral swing structure can enable the second arm support to bend (the angle between the two arm sections is changed) so as to swing left and right in the second plane. The design mode is beneficial to accurately controlling the left-right swing of the boom structure, the tail end of the boom structure is more accurate in positioning, the flexibility and the safety performance are higher, and the boom structure is easier to complete tasks which cannot be completed by traditional engineering vehicles or fire-fighting vehicles.

Description

Arm support structure, fire-fighting vehicle and engineering vehicle

Technical Field

The utility model relates to the technical field of arm frames, in particular to an arm frame structure, a fire-fighting vehicle and an engineering vehicle.

Background

As the boom is used more and more widely in engineering vehicle industry and fire-fighting vehicle industry, the functional requirements on the boom are higher and higher. In the related art, conventional telescopic booms and folding booms can only be unfolded and folded up and down or back and forth in the vertical direction. If the left-right transverse movement of the arm support is to be realized, the left-right transverse movement can only be realized through the rotary platform. However, the tail end of the arm support can move a large distance by rotating the rotary platform by a small angle, so that the control is difficult and the flexibility is low.

Disclosure of utility model

In order to solve or improve at least one of the above problems, an object of the present utility model is to provide a boom structure.

Another object of the present utility model is to provide a fire-fighting vehicle having the above boom structure.

The utility model further aims to provide the engineering vehicle with the arm support structure.

To achieve the above object, a first aspect of the present utility model provides a boom structure, including: a first arm support; the second arm support is rotationally connected with the first arm support, and can rotate in a first plane relative to the first arm support, and comprises: the first arm joint is rotationally connected with the first arm support; the second arm section is rotationally connected with the first arm section through a spiral swinging structure, and can rotate in a second plane relative to the first arm section through the spiral swinging structure, and the second plane is not overlapped with the first plane.

According to the technical scheme of the arm support structure, the spiral swing structure is additionally arranged, so that two arm sections (namely the first arm section and the second arm section) of the second arm support can be connected, and the spiral swing structure can enable the second arm support to bend (the angle between the first arm section and the second arm section changes) so as to swing left and right in a second plane. When the cantilever crane structure is swung left and right, not only can the cantilever crane structure integrally swing left and right through the turntable, but also the second cantilever crane can swing left and right through the spiral swing structure. The design mode is beneficial to accurately controlling the left-right swing of the arm support structure, and the tail end of the arm support structure is more accurate in positioning, and higher in flexibility and safety performance. In addition, the design mode can enable the boom structure to be easier to complete tasks which cannot be completed by the traditional engineering vehicle or fire-fighting vehicle.

Specifically, the boom structure comprises a first boom and a second boom. The second arm support is rotationally connected with the first arm support. Optionally, one end of the first arm support is used for being connected with the turntable. The other end of the first arm support is connected with one end of the second arm support through a first pin shaft. The second arm support can rotate relative to the first arm support around the axis of the first pin shaft. Optionally, the boom structure further comprises a drive member and a link structure. Specifically, the link structure includes a first link and a second link. One end of the first connecting rod is connected with the first arm support through a second pin shaft. The first link is rotatable about the axis of the second pin. One end of the second connecting rod is connected with the second arm support through a third pin shaft. The second connecting rod can rotate around the axis of the third pin shaft. The other end of the first connecting rod, the other end of the second connecting rod and one end of the driving piece are connected through a fourth pin shaft. The fourth pin shaft penetrates through the first connecting rod, the second connecting rod and the driving piece. The first connecting rod can rotate around the axis of the fourth pin shaft relative to the driving piece, and the second connecting rod can rotate around the axis of the fourth pin shaft relative to the driving piece. The other end of the driving piece is hinged with the first arm support. The axis of the first pin shaft, the axis of the second pin shaft, the axis of the third pin shaft and the axis of the fourth pin shaft are mutually parallel. The driving piece can stretch and retract to enable the second arm support to rotate around the axis of the first pin shaft relative to the first arm support through the connecting rod structure. Through the mutual cooperation of the connecting rod structure and the driving piece, the amplitude variation range of the angle between the second arm support and the first arm support is increased, the arm support structure is more flexible, and the working range is wider. Alternatively, the angular variation ranges from 0 degrees to 180 degrees.

Further, the second arm support can rotate in a first plane relative to the first arm support. Optionally, the first plane is a vertical plane. The first arm support and the second arm support are regarded as two connected line segments, and the two line segments only rotate in a first plane. The first arm support and the second arm support relatively move in an up-down or front-back movement mode.

Further, the second boom includes a first boom section and a second boom section. Specifically, the first arm section is rotatably connected with the first arm support. The second arm section is rotationally connected with the first arm section through a spiral swing structure. Optionally, the helical oscillating structure is connected with one end of the first arm section, and the helical oscillating structure is connected with one end of the second arm section. The other end (the end far away from the second arm section) of the first arm section is rotationally connected with the first arm support. Optionally, the other end of the first arm section is connected with the first arm support through a first pin shaft.

Further, the second arm section is rotatable in a second plane relative to the first arm section by a helical swing structure. Further, the second plane is not coincident with the first plane. A non-zero included angle exists between the second plane and the first plane. Optionally, the second plane is a horizontal plane, where the second plane is perpendicular to the first plane (and the included angle is 90 degrees). The first arm segment and the second arm segment are considered as two connected line segments. The first arm section and the second arm section relatively move in a side-to-side swinging manner in the second plane. In addition, the included angle between the second plane and the first plane can be any other non-zero included angle.

In the technical scheme defined by the utility model, two arm sections (namely the first arm section and the second arm section) of the second arm frame can be connected by additionally arranging the spiral swing structure, and the spiral swing structure can enable the second arm frame to bend (the angle between the first arm section and the second arm section changes) so as to swing left and right in a second plane. When the cantilever crane structure is swung left and right, not only can the cantilever crane structure integrally swing left and right through the turntable, but also the second cantilever crane can swing left and right through the spiral swing structure. The design mode is beneficial to accurately controlling the left-right swing of the arm support structure, and the tail end of the arm support structure is more accurate in positioning, and higher in flexibility and safety performance. In addition, the design mode can enable the boom structure to be easier to complete tasks which cannot be completed by the traditional engineering vehicle or fire-fighting vehicle.

In addition, the technical scheme provided by the utility model can also have the following additional technical characteristics:

In some embodiments, optionally, the spiral swing structure includes: a cylinder; the spiral rod penetrates through the cylinder body, and can rotate relative to the cylinder body, and a working cavity is formed between the inner wall of the cylinder body and the outer wall of the spiral rod; the piston is sleeved on the spiral rod, the piston is arranged in the working cavity and is fixed relative to the spiral rod in the circumferential direction, the piston can drive the spiral rod to rotate in the circumferential direction when moving axially along the center line of the cylinder body, one of the first arm section and the second arm section is connected with the cylinder body, and the other of the first arm section and the second arm section is connected with the spiral rod.

In this technical scheme, spiral swing structure includes cylinder body, spiral stick and piston. Specifically, the spiral rod penetrates through the cylinder body. The spiral rod can rotate relative to the cylinder body. Optionally, the centerline of the cylinder coincides with the centerline of the spiral rod. Further, a working cavity is formed between the inner wall of the cylinder body and the outer wall of the spiral rod. The piston is arranged in the working cavity and sleeved on the spiral rod. Optionally, the outer wall of the piston abuts against the inner wall of the cylinder, and the inner wall of the piston abuts against the outer wall of the spiral rod. Further, the piston and the spiral rod are relatively fixed in the circumferential direction. The piston can drive the spiral rod to circumferentially rotate when axially moving along the center line of the cylinder body. Optionally, the inner wall of the piston is provided with a first spiral tooth, the outer wall of the spiral rod is provided with a second spiral tooth, and the first spiral tooth and the second spiral tooth are mutually matched. Optionally, the first arm section is connected with a cylinder body of the spiral swing structure, and the second arm section is connected with a spiral rod of the spiral swing structure; or the second arm section is connected with the cylinder body of the spiral swing structure, and the first arm section is connected with the spiral rod of the spiral swing structure. The first arm section and the second arm section are respectively connected with the cylinder body of the spiral swinging structure and the spiral rod, so that the first arm section and the second arm section can rotate in a second plane through the spiral swinging structure. Due to the mutual matching of the first spiral teeth and the second spiral teeth, the spiral swinging structure can accurately control the angle between the first arm section and the second arm section. Optionally, the spiral rod is a bearing structure.

In some embodiments, optionally, the spiral swing structure further includes: and the support seat is connected with the cylinder body and the second arm section.

In this technical solution, the spiral oscillating structure further comprises a support seat. Specifically, the supporting seat is used for connecting the cylinder body and the second arm section. The supporting seat is connected with the cylinder body and is connected with the second arm section. The cylinder body is connected with the second arm section through the supporting seat. Through setting up the supporting seat, the cylinder body possesses bigger installation space and structural strength, and the staff is with spiral swing structure and second arm festival when being connected, and the operation is more convenient. Optionally, the supporting seat and the cylinder body are relatively fixed in a welding mode; or the supporting seat and the cylinder body are of an integrated structure, and compared with a post-processing mode, the structure is good in mechanical property and high in connection strength, is favorable for reducing the number of parts and improves the assembly efficiency. Optionally, one end of the second arm section is provided with an installation cavity, the spiral swing structure is arranged in the installation cavity, and the supporting seat is connected with the cavity wall of the installation cavity. The spiral swing structure is arranged in the second arm support, so that the arm support structure is simpler and the installation is more convenient.

In some embodiments, optionally, the support base is detachably connected to the second arm segment.

In the technical scheme, the supporting seat is detachably connected with the second arm section, so that a worker can conveniently disassemble and assemble the spiral swing structure, and maintenance or replacement is facilitated. Optionally, the support base is bolted to the second arm segment.

Optionally, the number of the supporting seats is at least one, that is, the number of the supporting seats can be one, two or more, and the supporting seats are flexibly arranged according to actual requirements in consideration of the connection strength, the occupied space, the cost and other factors between the spiral swinging structure and the second arm section in the connection state.

In some embodiments, optionally, the spiral swing structure further includes: at least two ring flanges, one end of spiral rod is located to at least one ring flange, and the other end of spiral rod is located to at least one ring flange, and the ring flange is used for connecting spiral rod and first arm festival.

In this technical solution, the spiral oscillating structure further comprises at least two flanges. Specifically, at least one flange plate is arranged at one end of the spiral rod, and at least one flange plate is arranged at the other end of the spiral rod. In other words, at least one flange is provided at each end of the screw rod. Further, a flange is used to connect the screw rod with the first arm segment. The flange is connected with the spiral rod, and the flange is connected with the first arm section. By arranging the flange plate, the connection between the spiral rod and the first arm section can be realized. Optionally, a plurality of first connection holes are formed on the flange plate, and the plurality of first connection holes are circumferentially arranged in an array. The end face of the spiral rod is provided with a plurality of second connecting holes, and the second connecting holes are circumferentially arrayed. The helical oscillating structure further comprises a plurality of connecting pieces. Each connecting piece is penetrated through a corresponding first connecting hole and a corresponding second connecting hole so as to realize the detachable connection of the spiral rod and the flange plate. Because the connection mode between spiral rod and the ring flange is detachable connection, make things convenient for the staff to install and dismantle the ring flange, be favorable to maintaining or change.

In some embodiments, optionally, the second arm rest further includes: the first mounting plate is connected with the flange plate and the first arm section.

In this technical scheme, the second arm support still includes first mounting panel. Specifically, the first mounting plate is used for connecting the flange plate and the first arm section. The first mounting plate is fixedly connected with the flange plate, and the first mounting plate is connected with the first arm section. Optionally, the helical oscillating structure further comprises an extension plate. The extension plate is connected with the flange plate. The flange plate is used for being connected with the spiral rod, and the extension plate is used for being connected with the first mounting plate. Optionally, the flange plate and the extension plate are relatively fixed in a welding mode, and the processing mode is simple; or the flange plate and the extension plate are of an integrated structure, and compared with a post-processing mode, the flange plate and the extension plate are good in mechanical property and high in connection strength, so that the number of parts is reduced, and the assembly efficiency is improved. Optionally, the extension plate and the first mounting plate are relatively fixed by welding. Optionally, the extension plate is perpendicular to the first mounting plate.

In some embodiments, optionally, the spiral swing structure further includes: and the balance valve is arranged on the cylinder body.

In this solution, the helical oscillating structure further comprises a balancing valve. Specifically, the balance valve is provided to the cylinder. There may be a large pressure or flow difference in certain parts of the interior of the helical oscillating structure, such as the working chamber, which difference can be reduced or balanced by means of a split flow by providing a balancing valve.

In some embodiments, the angle between the first plane and the second plane is optionally 85 degrees to 90 degrees.

In the technical scheme, the first arm support and the second arm support are regarded as two connected line segments, and the first arm support and the second arm support rotate in a first plane; the first arm section and the second arm section of the second arm frame are regarded as two connected line sections, and the first arm section and the second arm section rotate in a second plane. The included angle between the first plane and the second plane is set to be 85-90 degrees, so that the second arm support is favorable for realizing the transverse adjustment of the second arm support, the flexibility of the arm support structure is higher, and the working range of the arm support structure is wider.

A second aspect of the present utility model provides a fire-fighting vehicle comprising: a turntable; the cantilever crane structure in any one of the above technical solutions, wherein the first cantilever crane of the cantilever crane structure is connected with the turntable.

According to the technical scheme of the fire-fighting vehicle, the fire-fighting vehicle comprises the turntable and the arm support structure in any one of the technical scheme. The first arm support of the arm support structure is connected with the turntable. Optionally, the turntable comprises a first portion and a second portion, and the first portion is rotatably connected to the second portion. The first portion of the turntable is adapted to be coupled to a chassis of a fire fighting vehicle. The second part of the turntable is rotationally connected with the first arm support of the arm support structure.

It should be noted that the fire-fighting vehicle may be a climbing platform fire-fighting vehicle, a lifting jet fire-fighting vehicle, or the like.

The fire-fighting vehicle includes any one of the boom structures in the first aspect, so that the fire-fighting vehicle has the beneficial effects of any one of the technical schemes, and is not described herein.

A third aspect of the present utility model provides an engineering vehicle, comprising: a turntable; the cantilever crane structure in any one of the above technical solutions, wherein the first cantilever crane of the cantilever crane structure is connected with the turntable.

According to the technical scheme of the engineering vehicle, the engineering vehicle comprises the turntable and the arm support structure in any one of the technical scheme. The first arm support of the arm support structure is connected with the turntable. Optionally, the turntable comprises a first portion and a second portion, and the first portion is rotatably connected to the second portion. The first portion of the turntable is adapted to be connected to a chassis of the work vehicle. The second part of the turntable is rotationally connected with the first arm support of the arm support structure.

It should be noted that the engineering vehicle may be a concrete pump truck or the like.

The engineering vehicle includes any boom structure in the first aspect, so that the engineering vehicle has the beneficial effects of any technical scheme, and is not described herein.

Additional aspects and advantages of the present utility model will be made apparent from the description which follows, or may be learned by practice of the utility model.

Drawings

FIG. 1 illustrates a first schematic view of a boom structure according to an embodiment of the utility model;

FIG. 2 illustrates a first schematic view of a second boom according to one embodiment of the utility model;

FIG. 3 illustrates a second schematic view of a second boom according to an embodiment of the present utility model;

Fig. 4 shows a first schematic view of a spiral wobble structure according to an embodiment of the utility model;

FIG. 5 shows a second schematic view of a helical oscillating structure according to an embodiment of the utility model;

FIG. 6 illustrates a third schematic view of a second boom according to an embodiment of the present utility model;

FIG. 7 illustrates a second schematic view of a boom structure according to an embodiment of the utility model;

FIG. 8 illustrates a third schematic view of a boom structure according to an embodiment of the present utility model;

FIG. 9 shows a fourth schematic view of a boom structure according to an embodiment of the utility model;

FIG. 10 illustrates a fourth schematic view of a second boom according to an embodiment of the present utility model;

FIG. 11 shows a schematic view of a fire-fighting vehicle according to one embodiment of the utility model;

FIG. 12 illustrates a schematic diagram of an engineering vehicle according to one embodiment of the utility model.

The correspondence between the reference numerals and the component names in fig. 1 to 12 is:

100: a boom structure; 110: a first arm support; 120: a second arm support; 121: a first arm segment; 122: a second arm segment; 123: a spiral swing structure; 1231: a cylinder; 1232: a spiral rod; 1233: a working chamber; 1234: a piston; 1235: a support base; 1236: a flange plate; 1237: a balancing valve; 124: a first mounting plate; 130: a driving member; 140: a connecting rod structure; 141: a first link; 142: a second link; 151: a first pin; 152: a second pin; 153: a third pin; 154: a fourth pin; 210: a turntable; 300: a fire-fighting vehicle; 400: an engineering vehicle.

Detailed Description

In order that the above-recited objects, features and advantages of embodiments of the present utility model can be more clearly understood, a further detailed description of embodiments of the present utility model will be rendered by reference to the appended drawings and detailed description thereof. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but embodiments of the utility model may be practiced otherwise than as described herein, and therefore the scope of the utility model is not limited to the specific embodiments disclosed below.

The boom structure 100, the fire-fighting vehicle 300, and the engineering vehicle 400 provided according to some embodiments of the present utility model are described below with reference to fig. 1 to 12.

In one embodiment according to the present utility model, as shown in fig. 1, the boom structure 100 includes a first boom 110 and a second boom 120. The second arm support 120 is rotatably connected with the first arm support 110. Optionally, one end of the first arm support 110 is used to connect with the turntable 210. The other end of the first arm support 110 is connected to one end of the second arm support 120 through a first pin 151. The second arm support 120 can rotate relative to the first arm support 110 around the axis of the first pin 151. Optionally, the boom structure 100 further comprises a drive member 130 and a link structure 140. Specifically, the link structure 140 includes a first link 141 and a second link 142. One end of the first link 141 is connected to the first arm 110 through the second pin 152. The first link 141 is rotatable about the axis of the second pin 152. One end of the second link 142 is connected to the second arm support 120 through a third pin 153. The second link 142 is rotatable about the axis of the third pin 153. The other end of the first link 141, the other end of the second link 142, and one end of the driving member 130 are connected by a fourth pin 154. The fourth pin 154 is disposed through the first link 141, the second link 142, and the driving member 130. The first link 141 is rotatable about the axis of the fourth pin 154 with respect to the driving member 130, and the second link 142 is rotatable about the axis of the fourth pin 154 with respect to the driving member 130. The other end of the driving member 130 is hinged to the first arm 110. The axes of the first pin 151, the second pin 152, the third pin 153, and the fourth pin 154 are parallel to each other. The driving member 130 can extend and retract to enable the second arm support 120 to rotate relative to the first arm support 110 around the axis of the first pin 151 through the link structure 140. Through the mutual cooperation of the connecting rod structure 140 and the driving piece 130, the amplitude variation range of the angle between the second arm support 120 and the first arm support 110 is increased, the arm support structure 100 is more flexible, and the working range is wider. Alternatively, the angular variation ranges from 0 degrees to 180 degrees.

Further, as shown in fig. 9, the second arm support 120 can rotate in a first plane relative to the first arm support 110. Optionally, the first plane is a vertical plane. The first arm 110 and the second arm 120 are considered as two connected line segments, which rotate only in the first plane. The first arm support 110 and the second arm support 120 relatively move in a manner of moving up and down or back and forth.

Further, as shown in fig. 1, 2 and 3, the second boom 120 includes a first boom section 121 and a second boom section 122. Specifically, the first arm segment 121 is rotatably connected to the first arm support 110. The second arm section 122 is rotatably connected to the first arm section 121 by a helical swing structure 123. Alternatively, the spiral swing structure 123 is connected to one end of the first arm section 121, and the spiral swing structure 123 is connected to one end of the second arm section 122. The other end of the first arm section 121 (the end far from the second arm section 122) is rotatably connected to the first arm support 110. Optionally, the other end of the first arm section 121 is connected to the first arm support 110 through a first pin 151.

Further, as shown in fig. 10, the second arm segment 122 can rotate in a second plane relative to the first arm segment 121 by the helical swing structure 123. Further, the second plane is not coincident with the first plane. A non-zero included angle exists between the second plane and the first plane. Optionally, the second plane is a horizontal plane, where the second plane is perpendicular to the first plane (and the included angle is 90 degrees). The first arm segment 121 and the second arm segment 122 are considered as two connected line segments. The first arm segment 121 and the second arm segment 122 relatively move in a side-to-side swinging manner in the second plane. In addition, the included angle between the second plane and the first plane can be any other non-zero included angle.

As shown in fig. 6, 7 and 8, after the boom structure 100 is initially deployed (the first boom 110 and the second boom 120 rotate relatively), the boom structure 100 needs to be rotated by the turntable 210, so that the tail end of the boom structure 100 is close to the area to be worked. If there is an obstacle beside the boom structure 100 at this time, the whole rotation range of the boom structure 100 is limited, and even the normal operation of the boom structure 100 is affected. In the boom structure 100 of the present utility model, the second arm section 122 of the second boom 120 can rotate in the second plane relative to the first arm section 121 through the spiral swing structure 123, so that the tail end of the boom structure 100 can smoothly approach or reach the area to be worked, and the task that the conventional engineering vehicle 400 or fire-fighting vehicle 300 cannot complete is completed. θ in fig. 6 and θ in fig. 7 each represent an angle by which the first arm segment 121 and the second arm segment 122 are rotated relative to each other. The rotation range of the angle θ is 0 degrees to 180 degrees.

In the technical solution defined in the present utility model, by adding the spiral swing structure 123, two arm sections (i.e., the first arm section 121 and the second arm section 122) of the second arm support 120 can be connected, and the spiral swing structure 123 can bend the second arm support 120 (the angle between the first arm section 121 and the second arm section 122 changes) to swing left and right in the second plane. When the boom structure 100 is swung left and right, not only the boom structure 100 as a whole can be swung left and right by the turntable 210, but also the second boom 120 itself can be swung left and right by the spiral swing structure 123. The design mode is beneficial to accurately controlling the left-right swing of the arm support structure 100, and the tail end of the arm support structure 100 is positioned more accurately, and has higher flexibility and safety performance. In addition, the design may further make the boom structure 100 easier to perform tasks that cannot be performed by the conventional engineering vehicle 400 or the fire truck 300.

In some embodiments, optionally, as shown in fig. 4 and 5, the helical oscillating structure 123 includes a cylinder 1231, a helical rod 1232, and a piston 1234. Specifically, the screw rod 1232 is inserted through the cylinder 1231. The screw rod 1232 can rotate relative to the cylinder 1231. Optionally, the centerline of the cylinder 1231 coincides with the centerline of the helical rod 1232. Further, a working chamber 1233 is formed between the inner wall of the cylinder 1231 and the outer wall of the screw rod 1232. The piston 1234 is disposed within the working chamber 1233 and is disposed about the helical rod 1232. Optionally, the outer wall of the piston 1234 abuts the inner wall of the cylinder 1231, and the inner wall of the piston 1234 abuts the outer wall of the screw rod 1232. Further, the piston 1234 is fixed relative to the screw rod 1232 in the circumferential direction. The piston 1234 can drive the helical rod 1232 to rotate circumferentially as it moves axially along the centerline of the cylinder 1231. Optionally, the inner wall of the piston 1234 is provided with a first helical tooth, and the outer wall of the helical rod 1232 is provided with a second helical tooth, the first helical tooth and the second helical tooth being mutually matched. Alternatively, the first arm section 121 is connected to the cylinder 1231 of the helical oscillating structure 123, and the second arm section 122 is connected to the screw rod 1232 of the helical oscillating structure 123; or the second arm section 122 is connected to the cylinder 1231 of the helical oscillating structure 123, and the first arm section 121 is connected to the screw rod 1232 of the helical oscillating structure 123. Since the first arm section 121 and the second arm section 122 are respectively connected to the cylinder 1231 and the screw rod 1232 of the helical oscillating structure 123, the first arm section 121 and the second arm section 122 can be rotated in the second plane by the helical oscillating structure 123. The helical oscillating structure 123 enables precise control of the angle between the first arm segment 121 and the second arm segment 122 due to the interaction of the first helical tooth and the second helical tooth. Optionally, the helical rod 1232 is a bearing structure.

In some embodiments, optionally, as shown in fig. 4 and 5, the helical oscillating structure 123 further comprises a support seat 1235. Specifically, the support block 1235 is used to connect the cylinder block 1231 and the second arm segment 122. The support block 1235 is connected to the cylinder block 1231, and the support block 1235 is connected to the second arm segment 122. The cylinder 1231 is connected to the second arm segment 122 via a support block 1235. Through setting up supporting seat 1235, cylinder body 1231 possesses bigger installation space and structural strength, and the staff is with spiral oscillating structure 123 when being connected with second arm festival 122, and the operation is more convenient. Optionally, the support base 1235 and the cylinder body 1231 are relatively fixed by welding; or the supporting seat 1235 and the cylinder body 1231 are of an integrated structure, and compared with a post-processing mode, the structure is good in mechanical property and high in connection strength, is favorable for reducing the number of parts and improves the assembly efficiency. Optionally, a mounting cavity is provided at one end of the second arm segment 122, the spiral swing structure 123 is provided in the mounting cavity, and the supporting seat 1235 is connected with a cavity wall of the mounting cavity. By arranging the helical swinging structure 123 inside the second arm support 120, the arm support structure 100 is simpler and more convenient to install.

In some embodiments, optionally, the support base 1235 is detachably connected to the second arm segment 122, so that the worker can easily disassemble and assemble the spiral swing structure 123, which is convenient for maintenance or replacement. Optionally, the support base 1235 is bolted to the second arm segment 122.

Optionally, the number of the supporting seats 1235 is at least one, i.e. the supporting seats 1235 may be one, two or more, and the supporting seats 1235 are flexibly set according to practical requirements in consideration of the connection strength between the spiral swing structure 123 and the second arm section 122 in the connected state, the size of the occupied space, the cost and other factors.

In some embodiments, optionally, as shown in fig. 4 and 5, the spiral wobble structure 123 further comprises at least two flanges 1236. Specifically, at least one flange 1236 is provided at one end of the spiral rod 1232, and at least one flange 1236 is provided at the other end of the spiral rod 1232. In other words, at least one flange 1236 is provided at each end of the screw rod 1232. Further, a flange 1236 is used to connect the screw rod 1232 with the first arm segment 121. The flange 1236 is connected to the screw rod 1232, and the flange 1236 is connected to the first arm section 121. By providing the flange 1236, connection of the screw rod 1232 to the first arm segment 121 can be achieved. Optionally, the flange 1236 is provided with a plurality of first connection holes, and the plurality of first connection holes are circumferentially arranged in an array. The end face of the spiral rod 1232 is provided with a plurality of second connection holes, and the plurality of second connection holes are circumferentially arranged in an array. The helical oscillating structure 123 further comprises a plurality of connectors. Each connecting piece is penetrated through a corresponding first connecting hole and a corresponding second connecting hole so as to realize the detachable connection of the spiral rod 1232 and the flange plate 1236. Because the connection mode between the spiral rod 1232 and the flange plate 1236 is detachable connection, the flange plate 1236 is convenient for workers to install and detach, and maintenance or replacement is facilitated.

In some embodiments, optionally, as shown in fig. 4, the second boom 120 further comprises a first mounting plate 124. Specifically, the first mounting plate 124 is configured to connect the flange 1236 with the first arm segment 121. The first mounting plate 124 is fixedly connected to the flange 1236, and the first mounting plate 124 is connected to the first arm segment 121. Optionally, the helical oscillating structure 123 further comprises an extension plate. The extension plate is connected to the flange 1236. Wherein the flange 1236 is adapted to be coupled to the screw rod 1232 and the extension plate is adapted to be coupled to the first mounting plate 124. Optionally, the flange 1236 and the extension plate are relatively fixed by welding, so that the processing mode is simple; or the flange 1236 and the extension plate are of an integrated structure, and compared with a post-processing mode, the flange has the advantages of good mechanical property and high connection strength, is favorable for reducing the number of parts and improves the assembly efficiency. Alternatively, the extension plate and the first mounting plate 124 are relatively fixed by welding. Alternatively, the extension plate is perpendicular to the first mounting plate 124.

In some embodiments, optionally, as shown in fig. 4 and 5, the helical oscillating structure 123 further comprises a balancing valve 1237. Specifically, the balance valve 1237 is provided to the cylinder 1231. There may be a large pressure or flow differential at some point inside the helical oscillating structure 123, such as the working chamber 1233, which can be reduced or balanced by providing a balancing valve 1237 in a split manner.

In some embodiments, the angle between the first plane and the second plane is optionally 85 degrees to 90 degrees. Regarding the first arm support 110 and the second arm support 120 as two connected line segments, the first arm support 110 and the second arm support 120 rotate in a first plane; the first arm section 121 and the second arm section 122 of the second arm support 120 are regarded as two connecting line segments, and the first arm section 121 and the second arm section 122 rotate in a second plane. By setting the included angle between the first plane and the second plane to be 85 degrees to 90 degrees, the second arm support 120 is beneficial to realizing the lateral adjustment of the second arm support 120, the flexibility of the arm support structure 100 is higher, and the working range of the arm support structure 100 is wider.

In some embodiments, optionally, the cylinder (the driving member 130) provides power to drive the first arm frame 110 and the second arm frame 120 to fold in the vertical direction through the link structure 140. In the second arm support 120, the first arm section 121 and the second arm section 122 are connected together by a helical swing structure 123. The balance valve 1237 of the spiral swinging structure 123 provides power to drive the piston 1234 to move, and the spiral teeth (first spiral teeth) on the inner surface of the piston 1234 are meshed with the spiral teeth (second spiral teeth) on the output shaft (spiral rod 1232) to push the bearing to rotate, so that the second arm section 122 is driven to move left and right in the transverse direction.

Further, the oil cylinder (driving member 130) drives the first arm support 110 and the second arm support 120 to rotate relatively through the connecting rod structure 140, so as to realize the folding motion of the arm support structure 100 in the vertical direction. However, the motion adjustment in a single direction is difficult to meet the practical application of the boom structure 100, and the turntable 210 is used for controlling the lateral movement of the boom structure 100, so that the problems of large energy consumption, poor stability, large shaking of the boom structure 100 and the like exist. In the technical solution defined in the present utility model, the spiral swing structure 123 can adjust the lateral movement of the second arm support 120. After the first arm support 110 and the second arm support 120 are vertically opened around the axis of the first pin shaft 151, the second arm section 122 of the second arm support 120 is driven to horizontally and transversely rotate by the spiral swinging structure 123, so that the arm support structure 100 moves up and down and in the left and right directions.

Further, the spiral swing structure 123 is fixed and limited between the first arm section 121 and the second arm section 122 by a fixing plate (first mounting plate 124) and a fixing bolt. The outer surface of the piston 1234 has a set of helical teeth that mate with the helical teeth on the inner surface of the cylinder 1231, and the helical teeth formed on the surface of the piston 1234 engage with helical teeth on the bearing. The rotation angle of the cylinder 1231 and the screw rod 1232 in the circumferential direction is changed by the linear motion of the piston 1234, so that the rotation angle of the second arm segment 122 relative to the first arm segment 121 is adjusted. The rotation range of the angle θ is 0 degrees to 180 degrees. By precisely controlling the angle of rotation of the second arm segment 122 relative to the first arm segment 121, excessive bending of the waterway pipe due to excessive rotation of the boom structure 100 can be effectively avoided.

Further, a second mounting plate is provided on the second arm segment 122. The second arm segment 122 is bolted to the support base 1235 of the helical oscillating structure 123 by a second mounting plate. The first arm segment 121 is welded to the flange 1236 by a first mounting plate 124.

In the technical scheme defined by the utility model, the up-down and front-back adjustment between the first arm support 110 and the second arm support 120 can be realized through the mutual matching of the driving piece 130 and the connecting rod structure 140; by providing the spiral swing structure 123, the adjustment of the second arm section 122 and the first arm section 121 of the second arm support 120 in the left-right direction can be realized; the second arm support 120 adopts sectional connection, and limits the whole spiral swinging structure 123 to a single-section arm support, so that the connection structure between the first arm support 110 and the second arm support 120 is simplified. In addition, the sectional design of the second arm support 120 can adjust the position of the spiral swing structure 123 on the second arm support 120 according to practical application, so that the problem of multidirectional adjustment is solved, and the problems of installation space and folding interference are further solved.

In one embodiment according to the present utility model, as shown in FIG. 11, a fire truck 300 includes a turntable 210 and boom structure 100 in any of the embodiments described above. The first boom 110 of the boom structure 100 is connected to the turntable 210. Alternatively, the turntable 210 includes a first portion and a second portion, and the first portion is rotatably coupled to the second portion. A first portion of the turntable 210 is adapted to be coupled to the chassis of the fire truck 300. The second portion of the turntable 210 is rotatably coupled to the first arm support 110 of the arm support structure 100.

It should be noted that the fire-fighting vehicle 300 may be a climbing platform fire-fighting vehicle, a lifting jet fire-fighting vehicle, or the like.

In one embodiment according to the present utility model, as shown in fig. 12, the work vehicle 400 includes the turntable 210 and the boom structure 100 of any of the embodiments described above. The first boom 110 of the boom structure 100 is connected to the turntable 210. Alternatively, the turntable 210 includes a first portion and a second portion, and the first portion is rotatably coupled to the second portion. The first portion of the turntable 210 is configured to be coupled to a chassis of the work vehicle 400. The second portion of the turntable 210 is rotatably coupled to the first arm support 110 of the arm support structure 100.

It should be noted that the engineering vehicle 400 may be a concrete pump truck or the like.

According to the embodiment of the arm support structure, the fire-fighting vehicle and the engineering vehicle, the two arm sections (namely the first arm section and the second arm section) of the second arm support can be connected through the spiral swing structure, and the spiral swing structure can enable the second arm support to bend (the angle between the first arm section and the second arm section changes) so as to swing left and right in the second plane. When the cantilever crane structure is swung left and right, not only can the cantilever crane structure integrally swing left and right through the turntable, but also the second cantilever crane can swing left and right through the spiral swing structure. The design mode is beneficial to accurately controlling the left-right swing of the arm support structure, and the tail end of the arm support structure is more accurate in positioning, and higher in flexibility and safety performance. In addition, the design mode can enable the boom structure to be easier to complete tasks which cannot be completed by the traditional engineering vehicle or fire-fighting vehicle.

In the present utility model, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A boom structure, comprising:

a first arm (110);

The second arm support (120) is rotationally connected with the first arm support (110), the second arm support (120) can rotate in a first plane relative to the first arm support (110), and the second arm support (120) comprises:

The first arm joint (121) is rotationally connected with the first arm support (110);

the second arm section (122) is rotationally connected with the first arm section (121) through a spiral swing structure (123), the second arm section (122) can rotate in a second plane relative to the first arm section (121) through the spiral swing structure (123), and the second plane is not overlapped with the first plane.

2. Boom structure according to claim 1, characterized in that said helical oscillating structure (123) comprises:

A cylinder (1231);

The spiral rod (1232) is arranged in the cylinder body (1231) in a penetrating mode, the spiral rod (1232) can rotate relative to the cylinder body (1231), and a working cavity (1233) is formed between the inner wall of the cylinder body (1231) and the outer wall of the spiral rod (1232);

The piston (1234) is sleeved on the spiral rod (1232), the piston (1234) is arranged in the working cavity (1233), the piston (1234) is relatively fixed with the spiral rod (1232) in the circumferential direction, the piston (1234) can drive the spiral rod (1232) to rotate in the circumferential direction when moving axially along the central line of the cylinder body (1231), one of the first arm section (121) and the second arm section (122) is connected with the cylinder body (1231), and the other of the first arm section (121) and the second arm section (122) is connected with the spiral rod (1232).

3. The boom structure according to claim 2, characterized in that said helical swing structure (123) further comprises:

and a support base (1235) which connects the cylinder (1231) and the second arm section (122).

4. A boom structure according to claim 3, characterized in that said support base (1235) is detachably connected to said second arm section (122).

5. The boom structure according to claim 2, characterized in that said helical swing structure (123) further comprises:

At least two ring flanges (1236), at least one ring flange (1236) is located the one end of spiral stick (1232), at least one ring flange (1236) is located the other end of spiral stick (1232), ring flange (1236) are used for connecting spiral stick (1232) with first arm festival (121).

6. The boom structure of claim 5, wherein said second boom (120) further comprises:

A first mounting plate (124) connects the flange (1236) with the first arm segment (121).

7. The boom structure according to claim 2, characterized in that said helical swing structure (123) further comprises:

And a balance valve (1237) provided to the cylinder (1231).

8. Boom structure according to any of claims 1-7, characterized in that the angle between the first plane and the second plane is 85-90 degrees.

9. A fire fighting vehicle, comprising:

A turntable (210);

Boom structure according to any of claims 1 to 8, a first boom (110) of said boom structure being connected to said turntable (210).

10. An engineering vehicle, comprising:

A turntable (210);

Boom structure according to any of claims 1 to 8, a first boom (110) of said boom structure being connected to said turntable (210).