Support device, support leg and working machine

Abstract

The application relates to the field of mechanical equipment, and provides a supporting device, a supporting leg and a working machine, which comprise a telescopic cylinder, a supporting foot disc and a first traction assembly. The telescopic cylinder comprises a cylinder barrel and a telescopic rod. The supporting foot disc is slidably arranged at the end of the telescopic rod. The first traction assembly is arranged on the telescopic rod, the traction end of the first traction assembly is connected with the supporting foot disc, and the driving end of the first traction assembly is used for interacting with the cylinder barrel. The application can realize automatic retraction of the supporting foot disc when the telescopic cylinder is retracted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical equipment, and in particular to a support device, a support leg and a working machine. BACKGROUND

[0002] In the working process of the engineering machinery, in order to reduce the ground pressure of the support oil cylinder on the support leg and increase the stability of the engineering machinery, a support foot disc is usually arranged at the bottom of the support oil cylinder to increase the contact area of the support oil cylinder with the ground, thereby reducing the pressure of the support oil cylinder on the ground and increasing the friction force between the support oil cylinder and the ground.

[0003] When the engineering machinery is in a working state, the support foot disc is located at an outwardly extended position. Due to the requirement of vehicle width, when the engineering machinery is in a non-working state, the support foot disc needs to be retracted inwardly into the vehicle.

[0004] At present, there are two schemes for the extension and retraction of the support foot disc. The first scheme is to manually push and pull the support foot disc, and the second scheme is to retract and extend the support foot disc by a driving mechanism. Although the above operation modes have low manufacturing cost, they both need manual operation by the operator. In the actual use process, the user often forgets to retract the support foot disc, which leads to the situation that the support foot disc scratches pedestrians or vehicles during driving and causes safety accidents. SUMMARY

[0005] The present application aims at least to solve one of the problems in the prior art or related art.

[0006] To this end, the present application provides a support leg for being arranged on a support leg of a working machine, comprising:

[0007] a telescopic cylinder;

[0008] a support foot disc, which is slidably arranged at the end of the telescopic rod of the telescopic cylinder;

[0009] a first traction assembly, which is arranged on the telescopic rod, and the traction end of the first traction assembly is connected with the support foot disc, and the driving end of the first traction assembly is used to interact with the cylinder barrel of the telescopic cylinder;

[0010] When the telescopic rod is retracted into the cylinder barrel, and the driving end of the first traction assembly is in contact with the cylinder barrel, the traction end of the first traction assembly drives the support foot disc to move in a first direction with the movement of the telescopic rod, and the first direction intersects with the axis of the telescopic rod.

[0011] The support device further comprises a second traction assembly arranged between the telescopic rod and the foot disc, when the telescopic rod extends out of the cylinder and the driving end of the first traction assembly is separated from the cylinder, the second traction assembly drives the foot disc to move in a second direction, the second direction is opposite to the first direction.

[0012] The first traction assembly comprises a driving assembly and a reversing assembly, the driving assembly is arranged between the first end of the reversing assembly and the cylinder, and the second end of the driving assembly is connected with the foot disc.

[0013] When the telescopic rod is retracted into the cylinder, the driving assembly drives the first end of the reversing assembly to move in a direction parallel to the axis of the telescopic rod, and the second end of the reversing assembly drives the foot disc to move in the first direction.

[0014] The reversing assembly comprises:

[0015] A support member, the first end of the support member is connected with the telescopic rod, and the second end of the support member extends in a direction parallel to the first direction.

[0016] A lever, the lever is rotatably connected to the top of the support member, one end of the lever close to the telescopic rod is located below the cylinder, and the driving assembly is connected to one end of the lever close to the telescopic rod.

[0017] A traction rope, one end of the traction rope is connected to one end of the lever away from the telescopic rod, the other end of the traction rope is connected with the foot disc after passing through the second end of the support member, and the distance between the connection point of the traction rope and the foot disc and the telescopic rod is less than or equal to the distance between the second end of the support member and the telescopic rod.

[0018] The driving assembly comprises:

[0019] A driving rod, one end of the driving rod is rotatably connected to one end of the lever close to the telescopic rod, and the other end of the driving rod extends towards the cylinder;

[0020] A guide member, the guide member is slidably connected with the support member, the driving rod is slidably connected with the guide member, when the driving rod slides relative to the guide member, the driving rod drives the guide member to slide relative to the support member.

[0021] According to the support device provided by the application, the second traction assembly comprises at least one spring, when the first traction assembly drives the foot disc to move in the first direction, the spring is tensioned to store energy, and when the traction force of the first traction assembly disappears, the spring restores the deformation to pull the foot disc to move in the second direction.

[0022] According to the support device provided by the application, the second end of the support member is provided with a guide wheel, which is used to roll in contact with the traction rope.

[0023] According to the support device provided by the application, one end of the driving rod close to the cylinder is provided with a roller, which is in rolling contact with the cylinder.

[0024] The application further provides a support leg comprising the support device as described above.

[0025] The application further provides a working machine comprising the support device as described above or the support leg as described above.

[0026] The support device provided by the application is used to be arranged on a support leg of a working machine, comprising a telescopic cylinder, a foot disc and a first traction assembly. The telescopic cylinder comprises a cylinder and a telescopic rod. The foot disc is slidably arranged at the end of the telescopic rod. The first traction assembly is arranged on the telescopic rod, and the traction end of the first traction assembly is connected with the foot disc, and the driving end of the first traction assembly is used to interact with the cylinder of the telescopic cylinder. When the telescopic rod is retracted into the cylinder, and the driving end of the first traction assembly is in contact with the cylinder, with the movement of the telescopic rod, the driving end of the first traction assembly moves in the direction parallel to the axis of the telescopic rod, at this time, the traction end of the first traction assembly moves in the first direction, and in the process of movement, the traction end drives the foot disc to move, wherein the first direction intersects with the axis of the telescopic cylinder. When the support device provided by the application is arranged on the support leg, and when the telescopic rod is retracted into the cylinder, the first traction assembly can drive the foot disc to automatically move in the first direction, and when the first direction is arranged close to the working machine, the effect that the telescopic cylinder is retracted and the foot disc is automatically retracted is achieved.

[0027] Further, in the support leg and the working machine provided by the application, since the support device as described above is arranged, the same advantages as described above are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0029] Fig. 1 is a state diagram of the supporting device when the foot plate is retracted, provided by the present application;

[0030] Fig. 2 is a state diagram of the supporting device when the foot plate is extended, provided by the present application;

[0031] Fig. 3 is an exploded structural diagram of the supporting device, provided by the present application;

[0032] Fig. 4 is a structural diagram of the supporting leg, provided by the present application;

[0033] Reference signs:

[0034] 100: telescopic cylinder; 110: cylinder barrel; 120: telescopic rod; 200: foot plate; 210: connecting shaft; 300: first traction assembly; 311: support piece; 3111: horizontal rod; 3112: vertical rod; 3113: connecting ring; 312: lever; 313: traction rope; 314: guide wheel; 321: driving rod; 3211: roller; 322: guide piece; 400: spring; 500: outer arm. DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0036] In the description of the embodiments of the present application, it should be noted that the terms “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms “first”, “second”, “third” are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "connected", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0039] The embodiments of the present application will be described below in conjunction with Figs. 1 to 4 The embodiments of the present application are described. It should be understood that the following description is only a schematic embodiment of the present application and does not limit the present application.

[0040] The embodiments of the present application provide a support device, which includes a telescopic cylinder 100, a foot plate 200 and a first traction assembly.

[0041] The telescopic cylinder 100 can be a hydraulic cylinder, including a cylinder barrel 110 and a telescopic rod 120. The cylinder barrel 110 of the telescopic cylinder 100 can be arranged at one end of the support leg of the working machine away from the main body of the working machine, and the extension direction of the telescopic rod 120 is along the vertical direction, the telescopic cylinder 100 is extended downward, and is retracted upward.

[0042] The foot plate 200 is arranged at one end of the telescopic rod 120 away from the cylinder barrel 110, and the foot plate 200 is slidably connected with the end of the telescopic cylinder 100, and the sliding direction can be perpendicular to the extension direction of the telescopic rod 120. When applied to the support leg of the working machine, the sliding direction of the foot plate 200 can be parallel to the extension direction of the support leg or along the width direction of the main body of the working machine.

[0043] In a specific embodiment, the support leg of the working machine extends along the width direction of the main body of the working machine, and the foot plate 200 extends or retracts along the width direction of the main body of the working machine.

[0044] The first traction assembly is arranged on the telescopic rod 120, and a driving end of the first traction assembly is used to interact with the cylinder barrel 110 of the telescopic cylinder 100. Specifically, when the telescopic rod 120 is retracted upwards, the first traction assembly moves upwards along with the telescopic rod 120, and when reaching a position close to full retraction, the driving end of the first traction assembly is in contact with the bottom surface of the cylinder barrel 110, and as the telescopic rod 120 continues to retract, the driving end of the first traction assembly moves downwards relative to the telescopic rod 120.

[0045] The traction end of the first traction assembly is connected with the support disc 200, and the first traction assembly can convert the movement of the driving end in the vertical direction into movement in the first direction, which is the direction of approaching the main body of the working machine in the width direction of the main body of the working machine in this embodiment.

[0046] When the driving end of the first traction assembly moves downwards relative to the telescopic rod 120, the traction end of the first traction assembly can drive the support disc 200 to move in the first direction.

[0047] The support device provided by the present application is arranged on the outrigger of the working machine, and when the support device is arranged on the outrigger, the first direction can be configured as the direction of approaching the main body of the working machine in the width direction of the main body of the working machine. When the working machine finishes work, the telescopic rod 120 is retracted upwards, and in the process of retraction, the vertical movement of the driving end can be converted into movement in the first direction by the first traction assembly, and then the traction end drives the support disc 200 to move in the first direction, achieving the effect of automatic retraction of the telescopic cylinder 100 and the support disc 200.

[0048] In some embodiments of the present application, a second traction assembly is further included, and the second traction assembly is arranged between the telescopic rod 120 and the support disc 200. In the process of the telescopic rod 120 extending from the fully retracted state to the outside of the cylinder barrel 110, the driving end of the first traction assembly is out of contact with the cylinder barrel 110, at which time the traction force of the first traction assembly on the support disc 200 disappears. After the traction force of the first traction assembly on the support disc 200 disappears, the second traction assembly drives the support disc 200 to move in the second direction, which is opposite to the first direction.

[0049] When the support device is arranged on the outrigger of the working machine, the first direction is the direction of approaching the main body of the working machine, and then the second direction is the direction of moving away from the main body of the working machine, in other words, when the second traction assembly drives the support disc 200 to move in the second direction, the support disc 200 extends outwards.

[0050] In some embodiments of the present application, the first traction assembly includes a driving assembly and a reversing assembly, the driving assembly is arranged between the first end of the reversing assembly and the cylinder barrel 110, and the second end of the driving assembly is the traction end, which is connected with the support disc 200.

[0051] When the telescopic rod 120 drives the first traction assembly to move upward, and the driving assembly contacts the cylinder 110, the cylinder 110 prevents the driving assembly from continuing to move upward, at this time, the telescopic rod 120 drives the reversing assembly to continue to move upward, at this time, the driving assembly drives the first end of the reversing assembly to move downward. When the first end of the reversing assembly moves downward, the second end of the reversing assembly moves in the first direction, thereby driving the foot disc 200 to move in the first direction.

[0052] In further embodiments, the reversing assembly can include a support 311, a lever 312, and a traction rope 313.

[0053] The support 311 can be a reverse T-shaped structure, including a horizontal rod 3111 and a vertical rod 3112. One end of the horizontal rod 3111 is connected with the telescopic rod 120, after connection, the horizontal rod 3111 is fixedly connected on the telescopic rod 120, and the other end of the horizontal rod 3111 extends in a direction parallel to the first direction. The vertical rod 3112 is arranged at the top of the horizontal rod 3111, and the vertical rod 3112 extends upward.

[0054] The lever 312 is rotatably connected at the top of the vertical rod 3112, and the rotation axis is perpendicular to the extension direction of the horizontal rod 3111 and perpendicular to the axis of the telescopic rod 120. When the lever 312 is connected with the vertical rod 3112, it is necessary to ensure that the end of the lever 312 close to the telescopic rod 120 is always below the cylinder 110.

[0055] One end of the traction rope 313 is connected with the end of the lever 312 away from the telescopic rod 120, and the other end of the traction rope 313 is connected with the foot disc 200 after passing through the end of the horizontal rod 3111 away from the telescopic rod 120.

[0056] In the process of movement of the foot disc 200, it is ensured that the distance between the hinged point of the foot disc 200 and the telescopic rod 120 is less than the length between the end of the horizontal rod 3111 away from the telescopic rod 120 and the telescopic rod 120. In this way, it can be ensured that there is always a component force of the pulling force of the traction rope 313 extending in the first direction when the traction rope 313 moves, thereby driving the foot disc 200 to move in the first direction.

[0057] The driving assembly is arranged at the end of the lever 312 close to the telescopic rod 120, when the driving assembly moves downward relative to the telescopic rod 120, the end of the lever 312 close to the telescopic rod 120 moves downward, the end of the lever 312 away from the telescopic rod 120 moves upward and in the direction close to the telescopic rod 120, in the process of movement, the end of the lever 312 away from the telescopic rod 120 drives the traction rope 313 to move, and the pulling force of the part of the traction rope 313 connected with the foot disc 200 has a component force in the first direction, thereby driving the foot disc 200 to move in the first direction.

[0058] In addition, the length of the portion of the lever 312 located on the side close to the telescopic rod 120 at the hinged point can be less than the length of the portion located on the side away from the telescopic rod 120 at the hinged point, so that the end of the lever 312 close to the telescopic rod 120 moves a smaller distance, and the end of the lever 312 away from the telescopic rod 120 moves a larger distance, so as to extend the length of the movement path of the traction rope 313, and ensure that the foot plate 200 can be pulled to the fully retracted state.

[0059] In a further embodiment, the driving assembly can include a driving rod 321 and a guide 322.

[0060] The bottom end of the driving rod 321 can be rotationally connected to the end of the horizontal rod 3111 close to the telescopic rod 120, and the rotation axis is perpendicular to the extension direction of the horizontal rod 3111 and perpendicular to the axial direction of the telescopic rod 120. The top end of the driving rod 321 extends vertically upward. In this way, it can be ensured that the top of the driving rod 321 is blocked by the cylinder 110, and when the telescopic rod 120 moves downward relative to the cylinder 110, the end of the horizontal rod 3111 close to the telescopic rod 120 can be driven to move downward, and in the process of movement, the horizontal rod 3111 rotates relative to the driving rod 321.

[0061] Since the driving rod 321 is only rotationally connected to the horizontal rod 3111, in order to ensure that the driving rod 321 can move in the vertical direction, a guide 322 needs to be provided between the driving rod 321 and the horizontal rod 3111 to limit the rotation of the driving rod 321.

[0062] The guide 322 can be an L-shaped sheet structure, the horizontal part of the guide 322 is connected to the horizontal rod 3111, the vertical part of the guide 322 extends upward in the vertical direction, and a first sliding groove penetrating the guide 322 is provided on the vertical part of the guide 322. A first sliding block is provided on the side of the driving rod 321 close to the guide 322, and the first sliding block is slidably arranged in the first sliding groove.

[0063] When the driving rod 321 moves downward, the first sliding block and the first sliding groove can guide the movement of the driving rod 321, so that the driving rod 321 moves in the vertical direction and the rotation of the driving rod 321 is limited.

[0064] Since the driving rod 321 is connected to the end of the lever 312 close to the telescopic rod 120, and the driving rod 321 moves in the vertical direction, while the end of the lever 312 close to the telescopic rod 120 rotates about the shaft, the end of the lever 312 close to the telescopic rod 120 also moves away from the telescopic rod 120 in the process of moving downward.

[0065] The horizontal part of the guide 322 is connected to the horizontal rod 3111 in a sliding manner, and the sliding direction is parallel to the extending direction of the horizontal rod 3111. For example, a second sliding groove can be arranged on the horizontal part of the guide 322, and two bolt holes corresponding to the second sliding groove can be arranged on the horizontal rod 3111.

[0066] When the connection is made, the second sliding groove of the horizontal part of the guide 322 is arranged on the horizontal rod 3111 in a corresponding manner, and then a bolt is used to pass through the second sliding groove and is screwed into the bolt hole on the horizontal rod 3111. At this time, the bolt and the second sliding groove can provide a guide function for the guide 322.

[0067] When the driving rod 321 drives the lever 312 to move downward near one end of the telescopic rod 120, the lever 312 also drives the driving rod 321 to move away from the telescopic rod 120, and the driving rod 321 moves away from the telescopic rod 120 through the guidance of the guide 322.

[0068] In some embodiments of the present application, the second traction assembly can include at least one spring 400. One end of the spring 400 is connected to the telescopic rod 120, and the other end of the spring 400 is connected to the foot plate 200.

[0069] For example, one end of the spring 400 is connected to the side of the telescopic rod 120 near the first traction assembly, and the other end of the spring 400 is connected to the foot plate 200 on the side of the telescopic rod 120 near the first traction assembly. Specifically, the other end of the spring 400 can be connected to the position where the traction rope 313 is connected to the foot plate 200.

[0070] When the first traction assembly drives the foot plate 200 to move in the first direction, the spring 400 is tensioned and stored. When the telescopic rod 120 moves downward, the driving rod 321 is separated from the cylinder 110, and the tension of the first traction assembly on the foot plate 200 disappears. At this time, the spring 400 restores the deformation to release the elastic force and pulls the foot plate 200 to move in the second direction.

[0071] In an embodiment of the present application, the end of the horizontal rod 3111 of the support 311 connected to the telescopic rod 120 can be provided with a connecting ring 3113, and the connecting ring 3113 is arranged on the outside of the telescopic rod 120 and is located near the end of the telescopic rod 120. In addition, a through hole can be arranged on the connecting ring 3113 and penetrates the connecting ring 3113 in the radial direction of the connecting ring 3113, and a threaded hole corresponding to the through hole can be arranged on the telescopic rod 120. When the through hole is aligned with the threaded hole, a bolt is used to pass through the through hole and is screwed into the threaded hole, thereby connecting the connecting ring 3113 and the telescopic rod 120. In this way, the rotation of the connecting ring 3113 around the axis of the telescopic rod 120 can be limited, and the movement of the connecting ring 3113 along the axial direction of the telescopic rod 120 can also be limited.

[0072] The bottom of the side where the connecting ring 3113 is connected with the horizontal rod 3111 can be provided with a first connecting hole for connecting with the spring 400, and one end of the spring 400 is connected with the first connecting hole.

[0073] The connecting shaft 210 is arranged on the foot plate 200 and below the horizontal rod 3111, when the foot plate 200 is fully retracted, the limit position of the connecting shaft 210 moving with the foot plate 200 is below the outer end of the horizontal rod 3111, and when the foot plate 200 is fully extended, the limit position of the connecting shaft 210 moving with the foot plate 200 is below the side of the telescopic rod 120 close to the horizontal rod 3111.

[0074] The end of the traction rope 313 away from the lever 312 and the end of the spring 400 away from the connecting ring 3113 are connected with the connecting shaft 210.

[0075] In some embodiments of the present application, the second end of the support 311 is provided with a guide wheel 314 for guiding the movement of the traction rope 313, and the guide wheel 314 can rotate to reduce the friction between the traction rope 313 and the guide wheel 314. For example, the guide wheel 314 can be a pulley, and the center of the outer circumferential surface of the pulley is provided with a wire groove for limiting the axial movement of the traction rope 313 along the pulley.

[0076] In some embodiments of the present application, when the driving rod 321 drives the lever 312 to move close to the telescopic rod 120, the lever 312 also drives the driving rod 321 to move along the radial direction of the telescopic rod 120, and in order to reduce the friction between the driving rod 321 and the cylinder 110, a roller 3211 can be arranged at the top end of the driving rod 321.

[0077] The embodiments of the present application also provide a support leg, which comprises an outer arm 500 and the support device as described above, one end of the outer arm 500 is telescopically connected with the main body of the working machine, and the support device as described above is arranged at the end of the outer arm 500 away from the main body of the working machine. Since the support device as described above is arranged, the same advantages as described above are achieved.

[0078] The embodiments of the present application also provide a working machine, which can be a crane, a concrete pump truck or other machines with support legs, and since the support device as described above or the support leg as described above is arranged, the same advantages as described above are achieved.

[0079] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A support device, characterized in that, Outriggers for mounting on work machinery include: Telescopic cylinder; A support plate, which is slidably disposed at the end of the telescopic rod of the telescopic cylinder; A first traction assembly is mounted on the telescopic rod, and the traction end of the first traction assembly is connected to the support plate. The driving end of the first traction assembly is used to interact with the cylinder of the telescopic cylinder. When the telescopic rod retracts into the cylinder and the driving end of the first traction assembly contacts the cylinder, the traction end of the first traction assembly drives the support plate to move along a first direction as the telescopic rod moves, and the first direction intersects the axis of the telescopic rod. The first traction assembly includes a drive assembly and a reversing assembly. The reversing assembly includes a support member, a lever, and a traction rope. A first end of the support member is connected to the telescopic rod, and a second end of the support member extends in a direction parallel to the first direction. The lever is rotatably connected to the top of the support member, with one end of the lever near the telescopic rod located below the cylinder. The drive assembly is connected to the end of the lever near the telescopic rod. One end of the traction rope is connected to the end of the lever away from the telescopic rod, and the other end of the traction rope passes around the second end of the support member and is connected to the support plate. The distance from the connection point of the traction rope and the support plate to the telescopic rod is less than or equal to the distance from the second end of the support member to the telescopic rod. The drive assembly includes a drive rod and a guide member. One end of the drive rod is rotatably connected to the end of the lever near the telescopic rod, and the other end of the drive rod extends toward the cylinder. The guide member is slidably connected to the support member, and the drive rod is slidably connected to the guide member. When the drive rod slides relative to the guide member, the drive rod drives the guide member to slide relative to the support member.

2. The support device according to claim 1, characterized in that, It also includes a second traction component, which is disposed between the telescopic rod and the support plate. When the telescopic rod extends outward from the cylinder and the drive end of the first traction component separates from the cylinder, the second traction component drives the support plate to move in a second direction, which is opposite to the first direction.

3. The support device according to claim 2, characterized in that, The second traction component includes at least one spring. When the first traction component drives the support plate to move in the first direction, the spring is stretched and stores force. When the traction force of the first traction component disappears, the spring returns to its original deformation and pulls the support plate to move in the second direction.

4. The support device according to claim 1, characterized in that, The second end of the support member is provided with a guide wheel, which is used to make rolling contact with the traction rope.

5. The support device according to claim 1, characterized in that, A roller is provided at one end of the drive rod near the cylinder, and the roller makes rolling contact with the cylinder.

6. A support leg, characterized in that, Includes the support device as described in any one of claims 1 to 5.

7. A type of operating machinery, characterized in that, Includes the outrigger as described in claim 6.

Images