Overturning supporting leg mechanism

Abstract

The utility model discloses a turnover supporting leg mechanism, which relates to the technical field of engineering equipment and comprises a fixed base, a supporting leg, a limiter and a pneumatic supporting rod, one end of the supporting leg is rotationally connected with the fixed base around a first axis; the limiting device is fixedly arranged on the fixed base, the limiting device is provided with a limiting blocking part, the limiting blocking part is located on the side, rotating around the first axis, of the supporting leg, and the limiting blocking part can limit the supporting leg to rotate around the first axis towards the side provided with the limiting blocking part; one end of the pneumatic supporting rod and the fixed base rotate around a second axis, and the other end of the pneumatic supporting rod is rotationally connected with the supporting leg around a third axis; the second axis and the third axis are both rotationally connected with the first axis. The functions of directional overturning and slow descending can be achieved, and the personal safety of operators is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering equipment technical field, especially a kind of turnover outrigger mechanism. BACKGROUND

[0002] At present, the truck crane of medium tonnage needs to be turned up, and hydraulic turnover mechanism is used. If hydraulic control is used for small tonnage, there are disadvantages such as small space and high cost. Usually, the truck crane of small tonnage uses a locking pin for limiting, but this method has safety hazards in the process of turning over the outrigger of small tonnage. That is, the outrigger pulls out the locking pin and falls, and the user cannot predict the falling direction of the outrigger and cannot bear the weight of the falling outrigger, which has great safety hazards. SUMMARY

[0003] The utility model aims to provide a kind of turnover outrigger mechanism to solve the problems existing in the prior art, which can realize directional turnover and slow descent function and ensure the personal safety of operator.

[0004] To achieve the above purpose, the utility model provides the following scheme:

[0005] The utility model provides a kind of turnover outrigger mechanism, including fixed base, outrigger, limiter and pneumatic strut, one end of the outrigger is rotatably connected with the fixed base around first axis, the limiter is fixedly arranged on the fixed base, the limiter has limiting blocking part, the limiting blocking part is located on the side of the outrigger rotating around the first axis, and the limiting blocking part can limit the outrigger rotating around the first axis to the side with the limiting blocking part, one end of the pneumatic strut is rotatably connected with the fixed base around second axis, the other end of the pneumatic strut is rotatably connected with the outrigger around third axis, and the second axis and the third axis are rotatably connected with the first axis.

[0006] Preferably, the fixed base is a fixed plate, one end of the outrigger is fixedly provided with a rotating shaft, the rotating shaft is rotatably arranged on the fixed plate around the first axis, and the rotating shaft is fixedly provided with a rotating plate corresponding to the position of the fixed plate.

[0007] Preferably, the outrigger is fixedly provided with a connecting seat, the connecting seat is fixedly provided with a connecting rod, the connecting rod is provided with a plurality of first connecting holes, and one end of the pneumatic strut away from the fixed base is rotatably connected with one of the first connecting holes around the third axis.

[0008] Preferably, the connecting rod is provided with a second connecting hole and a third connecting hole, the third connecting hole is located on the side of the second connecting hole close to the first connecting hole; the connecting seat is provided with a fourth connecting hole and an arc-shaped hole group; the arc-shaped hole group comprises at least two fifth connecting holes, and each fifth connecting hole is arranged along an arc line; the second connecting hole can be connected with the fourth connecting hole through a first connecting piece, and the third connecting hole can be connected with one of the fifth connecting holes through a second connecting piece.

[0009] Preferably, the limiting device comprises a limiting plate and a limiting block; the limiting plate is fixedly arranged on the fixed base; the limiting block is fixedly arranged on the limiting plate; and the limiting block forms the limiting blocking part.

[0010] Preferably, the limiting plate is provided with an adjusting long slot; the limiting block is fixedly provided with a screw rod, the screw rod can slide through the adjusting long slot, and the part of the screw rod out of the adjusting long slot is screw-connected with a fastening nut.

[0011] Preferably, the limiting block is provided with an arc-shaped abutting surface, the arc-shaped abutting surface can abut against the outer side wall of the supporting leg and limit the rotation of the supporting leg around the first axis to the side with the limiting block.

[0012] Preferably, the fixed plate and the rotating plate are further provided with a locking device, and the locking device can keep the relative position between the fixed plate and the rotating plate.

[0013] Preferably, the fixed base is fixedly provided with a connecting support; and the two ends of the pneumatic supporting rod are respectively rotationally connected with the connecting support and the connecting rod through a connecting shaft.

[0014] Preferably, the limiting block is made of wear-resistant material.

[0015] Compared with the prior art, the utility model discloses the following technical effects:

[0016] The turnover supporting leg mechanism provided by the utility model sets a boundary for the rotation of the supporting leg through the limiting blocking part, when the supporting leg rotates around the first axis, due to the blocking of the limiting blocking part on one side, the supporting leg can only rotate unidirectionally towards the direction away from the limiting blocking part, thereby realizing directional turnover; when the supporting leg falls, due to the arrangement of the pneumatic supporting rod, air is discharged from the cylinder of the pneumatic supporting rod, the throttle valve can limit the speed of air discharge, slow down the speed of cylinder contraction, and then make the supporting leg slowly descend, so that the falling process of the supporting leg becomes stable and slow; due to the unidirectionality and slow descent effect of the supporting leg, the personal safety of the operator is ensured; and when the supporting leg is retracted, the retraction of the pneumatic supporting rod can also assist the retraction of the supporting leg, reduce the labor intensity of the operator, and make the operation more labor-saving; compared with hydraulic control, the overall structure has low cost, high usability, can be installed on the basis of the existing supporting leg, and realizes the safety protection function.

[0017] Further, the fixed plate and the rotating plate correspond, can realize the stable rotation support of one side of the supporting leg, ensure that the supporting leg rotates more stably, and reduce the shaking of the supporting leg rotating around the first axis.

[0018] Further, a plurality of first connecting holes are arranged on the connecting rod, and the end of the pneumatic supporting rod away from the fixed base can be connected with different first connecting holes, which provides the pneumatic supporting rod with adjustment of different supporting angles, so as to adapt to the adjustment of different pneumatic supporting auxiliary forces.

[0019] Further, the connecting rod can realize adjustment of the swinging posture thereof relative to the connecting seat, and the connecting position of the pneumatic supporting rod and the connecting rod is adjustable, so that the adjustment of the pneumatic supporting rod is more precise, the adjustable range is wider, the pneumatic supporting rod can be accurately positioned to more different preset angles, and the complex and changeable working condition requirements are met.

[0020] Further, the limiting plate is fixed on the fixed base, and provides a stable mounting base for the limiting block; the limiting block serves as the limiting blocking part, and when the supporting leg rotates to the preset position, the limiting block can accurately and stably stop the supporting leg from continuing to rotate in the direction, so that the turnover action of the supporting leg can be performed in a safe and controllable range each time.

[0021] Further, the existence of the adjusting long groove gives the limiting block movability, and the operator can easily change the position of the limiting block by sliding the position of the screw rod in the adjusting long groove according to the actual working condition requirements, so that the limiting block can reach the best limiting point.

[0022] Further, the arc-shaped fitting surface is matched with the outer wall of the leg, and the contact area is large when the two are fitted. Compared with the limiting mode of plane contact, the arc-shaped surface can more closely and accurately wrap the leg, so that the blocking and positioning of the limiting block on the leg are more accurate. When the leg is rotated to the preset position, the arc-shaped fitting surface is like a tailor-made "slot" that stably clamps the leg, effectively preventing the leg from deviating from the intended position due to slight shaking or external interference, and ensuring that the leg can be accurately stopped at the required angle each time, providing stable and reliable support for the entire device.

[0023] Further, when the leg is in the retracted state, the locking device serves as a safety barrier that can firmly fix the relative position of the fixed plate and the rotating plate, avoiding unnecessary displacement or shaking between the two, ensuring the firmness and safety of the leg retraction.

[0024] Further, the connecting bracket is fixed on the fixed base to provide a stable fulcrum for the pneumatic support rod; the connecting shaft is provided to facilitate the fixed connection of the pneumatic support rod, and as a rotating connecting piece, the connecting shaft gives the pneumatic support rod smooth rotating ability at both ends, enabling the pneumatic support rod to rotate more smoothly.

[0025] Further, during the operation of the turnover leg mechanism, the leg will frequently touch the limiting block, and each contact will generate friction. The limiting block made of wear-resistant material has high hardness and low surface friction coefficient, which can effectively resist the wear caused by repeated friction. Compared with ordinary materials, its durability is greatly improved, reducing the frequency of replacing the limiting block due to excessive wear, thereby prolonging the service life of the entire limiting device and even the turnover leg mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0027] Figure 1 The overall structure diagram of the turnover leg mechanism provided by the present application is shown in the figure.

[0028] Figure 2 The top view of the turnover leg mechanism provided by the present application is shown in the figure.

[0029] In the figure:

[0030] 10-fixed base; 11-connecting bracket;

[0031] 20 - leg; 21 - rotation axis; 22 - rotating plate; 23 - connecting seat; 231 - fifth connecting hole; 24 - connecting rod; 241 - first connecting hole; 242 - second connecting hole; 243 - third connecting hole;

[0032] 30 - limiting plate; 301 - adjusting long slot; 31 - limiting block; 311 - screw rod; 312 - arc-shaped fitting surface;

[0033] 40 - pneumatic supporting rod; 41 - connecting shaft. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part 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 skilled in the art without creative work fall within the scope of protection of the present application.

[0035] The present application provides a turnover leg mechanism to solve the problems in the prior art, and can realize directional turnover and slow descent, thereby ensuring the personal safety of operators.

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0037] Embodiment one

[0038] The present embodiment provides a turnover leg mechanism, as shown in Figure 1 and Figure 2 , which comprises a fixed base 10, a leg 20, a limiter and a pneumatic supporting rod 40. One end of the leg 20 is rotationally connected with the fixed base 10 around a first axis. The limiter is fixedly arranged on the fixed base 10, and the limiter has a limiting blocking part. The limiting blocking part is located on the side of the leg 20 rotating around the first axis, and the limiting blocking part can limit the rotation of the leg 20 around the first axis to the side with the limiting blocking part. One end of the pneumatic supporting rod 40 is rotationally connected with the fixed base 10 around a second axis, and the other end of the pneumatic supporting rod 40 is rotationally connected with the leg 20 around a third axis. The second axis and the third axis are both rotationally connected with the first axis.

[0039] The rotation of the support leg 20 is limited by the limiting block, and when the support leg 20 rotates around the first axis, due to the block on one side, the support leg 20 can only rotate in one direction away from the limiting block, thereby realizing directional overturning; when the support leg 20 falls, due to the setting of the pneumatic support rod 40, air is discharged from the cylinder of the pneumatic support rod 40, and the throttle valve can limit the speed of air discharge, slow down the speed of cylinder contraction, and then slowly lower the support leg 20, so that the falling process of the support leg 20 becomes stable and slow; due to the one-way nature and slow descent effect of the support leg 20, the personal safety of the operator is ensured; and when the support leg 20 is retracted, the retraction of the pneumatic support rod 40 can also assist the retraction of the support leg 20, reducing the labor intensity of the operator and making the operation more labor-saving; compared with hydraulic control, the overall structure has low cost, strong usability, and can be installed on the basis of the existing support leg 20 to realize the safety protection function.

[0040] Among them, the rotation setting of the fixed base 10 and the support leg 20 is as follows:

[0041] In the optional solution of the present embodiment, preferably, as shown in Figure 1 and Figure 2 , the fixed base 10 is a fixed plate; one end of the support leg 20 is fixedly provided with a rotating shaft 21, and the rotating shaft 21 is rotatably arranged on the fixed plate around the first axis; and the rotating shaft 21 is fixedly provided with a rotating plate 22 corresponding to the position of the fixed plate. The fixed plate and the rotating plate 22 correspond to each other, can realize stable rotation support of one side of the support leg 20, ensure more stable rotation of the support leg 20, and reduce the shaking of the support leg 20 rotating around the first axis.

[0042] Specifically, the rotating plate 22 and the fixed plate can have the same size.

[0043] Among them, the connection structure of the end of the pneumatic support rod 40 is as follows:

[0044] In the optional solution of the present embodiment, preferably, as shown in Figure 1 and Figure 2 , the support leg 20 is fixedly provided with a connecting seat 23, and the connecting seat 23 is fixedly provided with a connecting rod 24; the connecting rod 24 is provided with a plurality of first connecting holes 241; and the end of the pneumatic support rod 40 away from the fixed base 10 is rotatably connected with one of the first connecting holes 241 around the third axis. The connecting rod 24 is provided with a plurality of first connecting holes 241, and the end of the pneumatic support rod 40 away from the fixed base 10 can be connected with different first connecting holes 241, which provides the pneumatic support rod 40 with adjustment of different support angles, so as to adapt to the adjustment of different pneumatic support auxiliary forces.

[0045] In the optional solution of the present embodiment, preferably, as shown in Figure 1As shown, the connecting rod 24 is provided with a second connecting hole 242 and a third connecting hole 243, the third connecting hole 243 is located on the side of the second connecting hole 242 close to the first connecting hole 241; the connecting seat 23 is provided with a fourth connecting hole and an arc-shaped hole group; the arc-shaped hole group includes at least two fifth connecting holes 231, each fifth connecting hole 231 is arranged along an arc; the second connecting hole 242 can be connected with the fourth connecting hole through a first connecting piece, and the third connecting hole 243 can be connected with one of the fifth connecting holes 231 through a second connecting piece. The connecting rod 24 can realize the adjustment of its own swing posture relative to the connecting seat 23, and the adjustable connection position of the pneumatic support rod 40 and the connecting rod 24 can make the adjustment of the pneumatic support rod 40 more precise, the adjustable range wider, and more different preset angles can be accurately positioned to meet the complex and variable working condition requirements.

[0046] Specifically, the first connecting piece and the second connecting piece are existing connecting standard pieces, such as bolts and nuts.

[0047] In the optional scheme of the present embodiment, it is more preferred that Figure 1 and Figure 2 As shown, the fixed base 10 is fixedly provided with a connecting bracket 11; the two ends of the pneumatic support rod 40 are respectively connected with the connecting bracket 11 and the connecting rod 24 through a connecting shaft 41. The connecting bracket 11 is fixed on the fixed base 10, which provides a stable fulcrum for the pneumatic support rod 40; the connecting shaft 41 is provided to facilitate the fixed connection of the pneumatic support rod 40, and the connecting shaft 41 serves as a rotating connecting piece, which gives the pneumatic support rod 40 smooth rotating ability at both ends, so that the pneumatic support rod 40 can rotate more smoothly.

[0048] Specifically, the end of the pneumatic support rod 40 is connected with the corresponding position through the connecting shaft 41, which is an existing structure, and will not be described in detail here; for example, one end of the pneumatic support rod 40 is provided with a connecting hole, the connecting shaft 41 is fixedly inserted into the connecting hole, and the other end of the connecting shaft 41 is hinged with a first connecting hole 241 on the connecting rod 24.

[0049] Among them, the related setting of the stopper is explained as follows:

[0050] In the optional scheme of the present embodiment, it is more preferred that Figure 1 and Figure 2As shown, the position limiter comprises a position limiting plate 30 and a position limiting block 31; the position limiting plate 30 is fixedly arranged on the fixed base 10; the position limiting block 31 is fixedly arranged on the position limiting plate 30; the position limiting block 31 forms a position limiting blocking part. The position limiting plate 30 is fixed on the fixed base 10, providing a stable installation basis for the position limiting block 31; the position limiting block 31 serves as a position limiting blocking part, firmly attached to the position limiting plate 30, and can accurately and stably stop the support leg 20 from continuing to rotate in that direction when the support leg 20 rotates to the preset position, ensuring that each time the support leg 20 is turned, it can be done within a safe and controllable range.

[0051] In the optional solution of the present embodiment, preferably, as shown in Figure 1 As shown, the position limiting plate 30 has an adjusting long groove 301; the position limiting block 31 is fixedly provided with a screw rod 311 (which can be that the position limiting block 31 itself is fixedly provided with the screw rod 311, or the position limiting block 31 is arranged in a U shape and has a through hole in which a bolt is arranged, and the threaded section of the bolt forms the screw rod 311); the screw rod 311 can be slidably arranged in the adjusting long groove 301, and the part of the screw rod 311 that penetrates out of the adjusting long groove 301 is threadedly connected with a fastening nut. The existence of the adjusting long groove 301 gives the position limiting block 31 the mobility; the operator can easily change the position of the position limiting block 31 by sliding the position of the screw rod 311 in the adjusting long groove 301 according to the actual working condition requirements, so that the position limiting block 31 can reach the best position limiting point.

[0052] In the optional solution of the present embodiment, preferably, the position limiting block 31 has an arc-shaped fitting surface 312, which can be fitted with the outer side wall of the support leg 20 and limit the rotation of the support leg 20 around the first axis to the side with the position limiting block 31. The arc-shaped fitting surface 312 is shape-adapted to the outer side wall of the support leg 20, and when they are fitted, the contact area is large. Compared with the limiting mode of planar contact, the arc-shaped surface can more closely and accurately wrap the support leg 20, making the blocking and positioning of the position limiting block 31 on the support leg 20 more accurate. When the support leg 20 rotates to the preset position, the arc-shaped fitting surface 312 acts like a tailor-made "clamping groove" that stably clamps the support leg 20, effectively preventing the support leg 20 from deviating from the intended position due to slight shaking or external interference, and ensuring that the support leg 20 can be accurately stopped at the required angle each time, providing stable and reliable support for the entire device.

[0053] In the optional solution of the present embodiment, preferably, the position limiting block 31 is made of wear-resistant material. During the operation of the turnover support leg mechanism, the support leg 20 will frequently touch the position limiting block 31, and each contact will generate friction. The position limiting block 31 made of wear-resistant material has high hardness and low surface friction coefficient, which can effectively resist the wear caused by repeated friction. Compared with ordinary materials, its durability is greatly improved, reducing the frequency of replacement due to excessive wear of the position limiting block 31, thereby prolonging the service life of the entire position limiter and even the turnover support leg mechanism.

[0054] In which, about other related settings:

[0055] In the optional solution of the embodiment, preferably, the fixed plate and the rotating plate 22 are further provided with a locking device, which can keep the relative position between the fixed plate and the rotating plate 22. When the supporting leg 20 is in the retracted state, the locking device is equivalent to a safety barrier, which can firmly fix the relative position of the fixed plate and the rotating plate 22, avoid unnecessary displacement or shaking between them, and ensure the firmness and safety of the retraction of the supporting leg 20.

[0056] Specifically, the locking device is any structure for locking the relative position of the fixed plate and the rotating plate 22, such as a locking pin, and the fixed plate and the rotating plate 22 are provided with a locking hole at the corresponding position, and the locking pin is arranged in the locking hole.

[0057] Specifically, as shown in Figure 1 The working direction is that the supporting leg 20 rotates clockwise around the first axis to realize the lowering of the supporting leg 20; the reverse rotation of the supporting leg 20 is blocked by the stopper, and the pneumatic support rod 40 provides a reverse supporting force for the rotation of the supporting leg 20, so that the supporting leg 20 falls gently in the process of lowering.

[0058] Specifically, based on the adjustable position between the connecting rod 24 and the connecting seat 23 and the adjustable connecting position between the connecting rod 24 and the pneumatic support rod 40, the initial force arm length of the pneumatic support rod 40 can be adjusted.

[0059] Specifically, the rotating supporting leg mechanism of the embodiment has a small installation space and is suitable for the turning of a small-tonnage crane supporting leg.

[0060] The principle and implementation mode of the specific examples are described in the utility model, and the above embodiment is only used to help understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the utility model, the specific implementation mode and application range will be changed. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A flip out leg mechanism characterised in that: The fixed base, the supporting leg, the position limiter and the pneumatic supporting rod are included. One end of the supporting leg is rotationally connected with the fixed base around a first axis. The position limiter is fixedly arranged on the fixed base, and the position limiter has a position limiting block, which is located on one side of the supporting leg rotating around the first axis and can limit the rotation of the supporting leg around the first axis to the side with the position limiting block. One end of the pneumatic supporting rod is rotationally connected with the fixed base around a second axis, and the other end of the pneumatic supporting rod is rotationally connected with the supporting leg around a third axis; the second axis and the third axis are both rotationally connected with the first axis.

2. The roll-over leg mechanism of claim 1, wherein: The fixed base is a fixed plate. One end of the supporting leg is fixedly arranged with a rotating shaft, which is rotationally arranged on the fixed plate around the first axis. A rotating plate is fixedly arranged on the rotating shaft corresponding to the position of the fixed plate.

3. The roll-over leg mechanism of claim 1, wherein: A connecting seat is fixedly arranged on the supporting leg, and a connecting rod is fixedly arranged on the connecting seat. A plurality of first connecting holes are arranged on the connecting rod. One end of the pneumatic supporting rod away from the fixed base is rotationally connected with one of the first connecting holes around the third axis.

4. The flip-out leg mechanism of claim 3, wherein: A second connecting hole and a third connecting hole are arranged on the connecting rod, and the third connecting hole is located on the side of the second connecting hole close to the first connecting hole. A fourth connecting hole and an arc-shaped hole group are arranged on the connecting seat; the arc-shaped hole group includes at least two fifth connecting holes, and each fifth connecting hole is arranged along an arc line. The second connecting hole can be connected with the fourth connecting hole through a first connecting piece, and the third connecting hole can be connected with one of the fifth connecting holes through a second connecting piece.

5. The flip-out leg mechanism of claim 1, wherein: The position limiter includes a position limiting plate and a position limiting block. The position limiting plate is fixedly arranged on the fixed base, and the position limiting block is fixedly arranged on the position limiting plate; the position limiting block forms the position limiting block.

6. The flip-out leg mechanism of claim 5, wherein: An adjusting long groove is arranged on the position limiting plate; a screw rod is fixedly arranged on the position limiting block, the screw rod can slide through the adjusting long groove, and the part of the screw rod out of the adjusting long groove is threadedly connected with a fastening nut.

7. The flip-out leg mechanism of claim 5, wherein: An arc-shaped fitting surface is arranged on the position limiting block, which can fit with the outer wall of the supporting leg and limit the rotation of the supporting leg around the first axis to the side with the position limiting block.

8. The flip-out leg mechanism of claim 2, wherein: A locking device is further arranged on the fixed plate and the rotating plate, which can keep the relative position between the fixed plate and the rotating plate.

9. The flip-out leg mechanism of claim 3, wherein: A connecting support is fixedly arranged on the fixed base. The two ends of the pneumatic supporting rod are respectively rotationally connected with the connecting support and the connecting rod through a connecting shaft.

10. The flip-out leg mechanism of claim 5, wherein: The material of the position limiting block is wear-resistant material.

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