CN215946580U - Built-in three-stage telescopic leg device - Google Patents
Built-in three-stage telescopic leg device Download PDFInfo
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- CN215946580U CN215946580U CN202122557885.3U CN202122557885U CN215946580U CN 215946580 U CN215946580 U CN 215946580U CN 202122557885 U CN202122557885 U CN 202122557885U CN 215946580 U CN215946580 U CN 215946580U
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Abstract
A built-in three-stage telescopic leg device relates to a horizontal leg mechanism of a medium-large tonnage folding arm crane. The device comprises a horizontal telescopic leg mechanism, a leg telescopic linear driving mechanism and an oil line pipe group connected with a vertical leg oil cylinder; the oil circuit pipe group is arranged on one side of the inner cavity of the third-level supporting leg, and the oil circuit pipe group is arranged on the other side of the inner cavity of the third-level supporting leg. The present case adopts built-in structural design, only has local rolling friction between the flexible linear drive mechanism of oil pipe groove and landing leg, does not have any sliding friction between the flexible linear drive mechanism of landing leg, the flexible leg mechanism of level and tow chain mechanism in the flexible in-process of corresponding landing leg, effectively stops wearing and tearing or jamming phenomenon to appear in hose or the tow chain, guarantees that each mechanism motion is steady to can realize the flexible order of tertiary flexible landing leg through the size of controlling the hydro-cylinder footpath at all levels of tertiary telescoping cylinder. The utility model has the characteristics of meeting the whole vehicle stability of the medium-large tonnage non-counterweight folding arm lorry-mounted crane, along with simple and convenient assembly and disassembly, high space utilization rate and the like.
Description
Technical Field
The utility model relates to a horizontal leg mechanism of a medium-large tonnage folding arm crane, in particular to structural improvement of a built-in three-stage telescopic leg device.
Background
The tonnage of the balance-weight-free lorry-mounted crane is larger in the field of operation of the folding arm lorry-mounted crane, the requirement of the span of the support leg for meeting the stability of the whole crane is larger, due to the requirements of domestic bulletins and regulations, the overall width size of the lorry-mounted crane needs to be strictly controlled within the range of 2550mm, therefore, the occupied space of the three-stage telescopic leg is much smaller than that of the two-stage support leg under the same span, the existing traditional three-stage telescopic leg device of the crane is composed of a two-stage oil cylinder and a zipper, the installation difficulty of structures such as the zipper of the oil cylinder inside the device is larger, the failure rate is high, and the problems of inconvenience in disassembly and maintenance are solved.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems, the utility model provides the built-in three-stage telescopic leg device which meets the whole vehicle stability of the medium-large tonnage non-counterweight folding arm lorry-mounted crane, is simple and convenient to mount and dismount and has high space utilization rate.
The technical scheme of the utility model is as follows: the built-in three-stage telescopic leg device comprises a horizontal telescopic leg mechanism, a support leg telescopic linear driving mechanism and an oil line pipe group connected with a vertical support leg oil cylinder;
the horizontal telescopic leg mechanism comprises a primary supporting leg, a secondary supporting leg and a tertiary supporting leg which are sequentially sleeved; the oil pipe group is arranged on one side of the inner cavity of the three-stage supporting leg, and the supporting leg telescopic linear driving mechanism is arranged on the other side of the inner cavity of the three-stage supporting leg;
the oil line pipe group is connected to the vertical support oil cylinder through an upper oil pipe groove, a drag chain and a lower oil pipe groove in sequence;
one end of the upper oil pipe groove is fixedly connected with the chassis base, the other end of the upper oil pipe groove extends towards the direction of the vertical supporting leg, and the bottom of the upper oil pipe groove is supported by a roller sleeve which is matched and movably connected;
the roller sleeves are movably connected with the supporting leg telescopic linear driving mechanism through connecting rods;
the lower oil pipe groove is fixedly arranged at the bottom of the inner cavity of the third-stage supporting leg;
one end of the drag chain is fixedly arranged below the other end of the upper oil pipe groove at intervals;
the other end of the drag chain extends towards the direction of the chassis base and is fixedly connected with the side, close to the chassis base, of the lower oil pipe groove.
The supporting leg telescopic linear driving mechanism comprises a linear driving mechanism I, a linear driving mechanism II and a linear driving mechanism III;
the first-stage supporting leg extends out of the bottom of the base of the chassis through a first linear driving mechanism connected with the first-stage supporting leg;
the secondary supporting leg extends out of the primary supporting leg through a linear driving mechanism II connected with the secondary supporting leg;
the third-stage supporting leg extends out of the second-stage supporting leg through a linear driving mechanism III connected with the third-stage supporting leg, and then the vertical supporting leg extends out to a specified position.
The roller sleeves are movably arranged on the cylinder body of the first linear driving mechanism through a connecting rod.
The rolling sleeve comprises a rolling body and a pair of blocking pieces;
the rolling body is matched with the upper oil pipe groove;
the pair of baffle plates are symmetrically and fixedly arranged on the side parts of the rolling bodies and are positioned on the side parts of the upper oil pipe groove.
The separation blade is circular, can dismantle fixed the setting through the connecting piece and be in on the rolling element.
The oil way pipe group comprises a second hard pipe group, a soft pipe group and a second hard pipe group which are sequentially communicated;
the second hard pipe group is fixedly arranged in the upper oil pipe groove, one end of the second hard pipe group is connected with the hydraulic control element of the vertical supporting leg, and the other end of the second hard pipe group is connected with one end of the hose group;
the second hard pipe group is fixedly arranged in the lower oil pipe groove, one end of the second hard pipe group is connected with the vertical supporting leg oil cylinder, and the other end of the second hard pipe group is connected with the other end of the hose group.
The first linear driving mechanism, the second linear driving mechanism and the third linear driving mechanism are respectively an oil cylinder, an air cylinder or an electric push rod.
The utility model comprises a horizontal telescopic leg mechanism, a leg telescopic linear driving mechanism and an oil line pipe group connected with a vertical leg oil cylinder; the oil circuit pipe group is arranged on one side of the inner cavity of the third-level supporting leg, and the oil circuit pipe group is arranged on the other side of the inner cavity of the third-level supporting leg. The present case adopts built-in structural design, only has local rolling friction between the flexible linear drive mechanism of oil pipe groove and landing leg, does not have any sliding friction between the flexible linear drive mechanism of landing leg, the flexible leg mechanism of level and tow chain mechanism in the flexible in-process of corresponding landing leg, effectively stops wearing and tearing or jamming phenomenon to appear in hose or the tow chain, guarantees that each mechanism motion is steady to can realize the flexible order of tertiary flexible landing leg through the size of controlling the hydro-cylinder footpath at all levels of tertiary telescoping cylinder. The utility model has the characteristics of meeting the whole vehicle stability of the medium-large tonnage non-counterweight folding arm lorry-mounted crane, along with simple and convenient assembly and disassembly, high space utilization rate and the like.
Drawings
Figure 1 is a schematic perspective view of the present invention,
figure 2 is a schematic perspective view of the present invention,
figure 3 is a schematic diagram of the internal three-dimensional structure of the utility model,
figure 4 is a schematic diagram of the internal three-dimensional structure of the utility model,
figure 5 is a schematic view showing the three-dimensional structure of the installation and connection of the leg extension linear driving mechanism,
figure 6 is a schematic view of a mounting and connecting three-dimensional structure of the leg extension linear driving mechanism,
figure 7 is a schematic perspective view of the installation of the drag chain,
figure 8 is a schematic perspective view showing the roller in the installed state,
FIG. 9 is a schematic perspective view of the roller in the installed state;
in the figure, 1 is a horizontal telescopic leg mechanism, 11 is a primary leg, 12 is a secondary leg, 13 is a tertiary leg,
2 is a support leg extension linear driving mechanism, 21 is a linear driving mechanism I, 22 is a linear driving mechanism II, 23 is a linear driving mechanism III,
3 is a vertical supporting leg oil cylinder, 4 is an oil way pipe group,
51 is an upper oil pipe groove, 52 is a drag chain, 53 is a lower oil pipe groove,
6 is a roller sleeve, 61 is a rolling body, and 62 is a stopper.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in figures 1-9, the utility model is internally provided with a three-stage telescopic leg device, which comprises a horizontal telescopic leg mechanism 1, a leg telescopic linear driving mechanism 2 and an oil line pipe group 4 connected with a vertical leg oil cylinder 3;
the horizontal telescopic leg mechanism 1 comprises a first-stage supporting leg 11, a second-stage supporting leg 12 and a third-stage supporting leg 13 which are sequentially sleeved;
the horizontal telescopic leg mechanism 1 is hydraulically driven by a three-stage telescopic oil cylinder to realize horizontal movement, when the first-stage supporting leg 11, the second-stage supporting leg 12 and the third-stage supporting leg 13 move horizontally relatively, the friction among supporting leg structures is reduced through an upper sliding block behind the supporting leg, and the upper sliding block in front of the supporting leg is special for bearing during normal work.
The oil pipe group 4 is arranged on one side of the inner cavity of the three-stage supporting leg 13, and the supporting leg telescopic linear driving mechanism 2 is arranged on the other side of the inner cavity of the three-stage supporting leg 13;
the oil pipe group 4 is connected to the vertical support oil cylinder 3 through an upper oil pipe groove 51, a drag chain 52 and a lower oil pipe groove 53 in sequence;
one end of the upper oil pipe groove 51 is fixedly connected with the chassis base, the other end extends towards the direction of the vertical supporting leg, and the bottom of the upper oil pipe groove is supported by a roller 6 which is matched and movably connected;
the roller 6 is movably connected with a cylinder body of a linear driving mechanism I21 of the support leg telescopic linear driving mechanism 2 through a connecting rod; when the support leg telescopic linear driving mechanism 2 moves horizontally relative to the upper oil pipe groove 51, the roller sleeve 6 rolls at the bottom of the upper oil pipe groove 51, so that the friction force of equipment during telescopic motion is reduced while the support is provided for the upper oil pipe groove 51;
the lower oil pipe groove 53 is fixedly arranged at the bottom of the inner cavity of the third-stage supporting leg 13;
one end of the drag chain 52 is fixedly arranged below the other end of the upper oil pipe groove 51 at intervals;
the other end of the drag chain 52 extends towards the chassis base direction and is fixedly connected with the side, close to the chassis base, of the oil pipe discharging groove 53. In the scheme, the oil pipe group 4 is positioned in the upper oil pipe groove 51 and the lower oil pipe groove 53 and is made of copper pipes, and the part inside the drag chain 52 is made of a hose.
The leg extension linear driving mechanism 2 is further expanded, and the leg extension linear driving mechanism 2 comprises a linear driving mechanism I21, a linear driving mechanism II 22 and a linear driving mechanism III 23;
the primary supporting leg 11 extends out of the bottom of the base of the chassis through a linear driving mechanism I21 connected with the primary supporting leg;
the secondary supporting leg 12 extends out of the primary supporting leg 11 through a second linear driving mechanism 22 connected with the secondary supporting leg;
the third-stage supporting leg 13 extends out of the second-stage supporting leg 12 through a linear driving mechanism three 23 connected with the third-stage supporting leg, and then the vertical supporting leg is extended to a designated position.
The vertical supporting leg oil cylinder 3 is vertically arranged in the vertical supporting leg, and after the horizontal direction of the vertical supporting leg extends to a designated position, the vertical supporting leg oil cylinder 3 is started to lower the base of the vertical supporting leg to the ground to support the crane.
The hinge point A of a piston rod of the third linear driving mechanism 23 is fixed with a pin shaft at the front end of the third-level supporting leg 13, so that synchronous horizontal motion of the piston rod of the third linear driving mechanism 23 and the structure of the third-level supporting leg 13 is realized, a cylinder barrel of the third linear driving mechanism 23 is fixed with a cylinder barrel hinge type bolt of the second linear driving mechanism 22, an intersection point F of the second linear driving mechanism 22 is fixed with a pin shaft at the tail part of the second-level supporting leg 12, and synchronous horizontal motion of the cylinder barrel of the third linear driving mechanism 23, the cylinder barrel of the second linear driving mechanism 22 and the structure of the second-level supporting leg 12 is ensured;
the hinge point D of the piston rod of the linear driving mechanism II 22 is fixed with the cylinder barrel of the linear driving mechanism I21, the cylinder barrel of the linear driving mechanism II 22 and the cylinder barrel of the linear driving mechanism I21 slide relatively through a guide rail and a slide block, the hinge point C on the cylinder barrel of the linear driving mechanism I21 is fixed with the lower portion of the tail portion of the first-stage supporting leg 11, the hinge point B and the hinge point E of the linear driving mechanism I21 are respectively fixed with the upper portion of the tail portion of the first-stage supporting leg 11 and an external base, synchronous horizontal movement of the cylinder barrel of the linear driving mechanism I21, the piston rod of the linear driving mechanism II 22 and the first-stage supporting leg 11 is achieved, and therefore three-stage stretching and stretching sequence is determined by the diameter of the stretching cylinder.
The roller 6 is movably arranged on the cylinder body of the linear driving mechanism I21 through a connecting rod.
The piston rod end of the first linear driving mechanism 21 is fixedly connected with the chassis base, and the purpose that the horizontal telescopic leg mechanism 1 extends out of the chassis base is achieved through extension of the cylinder body.
The rollers 6 further define:
the roller sleeve 6 comprises a rolling body 61 and a pair of blocking pieces 62;
the rolling body 61 is matched with the upper oil pipe groove 51;
the pair of baffle plates 62 are symmetrically and fixedly arranged on the side of the rolling body 61 and are positioned on the side of the upper oil pipe groove 51.
The baffle plate 62 is circular and is detachably and fixedly arranged on the rolling body through a connecting piece.
The oil tube group 4 further defines:
the oil line pipe group 4 comprises a second hard pipe group, a soft pipe group and a second hard pipe group which are sequentially communicated;
the second hard pipe group is fixedly arranged in the upper oil pipe groove 51, one end of the second hard pipe group is connected with the hydraulic control element of the vertical supporting leg, and the other end of the second hard pipe group is connected with one end of the hose group;
the second hard pipe group is fixedly arranged in the oil outlet pipe groove 53, one end of the second hard pipe group is connected with the vertical supporting leg oil cylinder 3, and the other end of the second hard pipe group is connected with the other end of the hose group.
The linear driving mechanism I21, the linear driving mechanism II 22 and the linear driving mechanism III 23 are respectively an oil cylinder, an air cylinder or an electric push rod. The oil cylinder is preferably adopted in the scheme, namely the oil cylinder I, the oil cylinder II and the oil cylinder III are respectively adopted.
In the present case, the horizontal telescopic leg mechanism 1, the support leg telescopic linear driving mechanism 2 and the oil line pipe group 4 connected with the vertical support leg oil cylinder 3 are respectively designed in a built-in structure, only local rolling friction exists between the upper oil pipe groove 51 and the support leg telescopic linear driving mechanism 2, no sliding friction exists between the support leg telescopic linear driving mechanism 2, the horizontal telescopic leg mechanism 1 and the drag chain 52 mechanism in the corresponding support leg telescopic process, the phenomenon of abrasion or clamping stagnation of a hose or a drag chain 52 is effectively avoided, the stable motion of each mechanism is ensured, and the telescopic sequence of the three-level telescopic support leg can be realized by controlling the size of the cylinder diameter of each level of the three-level telescopic cylinder or other hydraulic control elements.
When the first-stage supporting leg 11 extends out, the second hard tube group and the upper oil tube groove 51 are static, the roller sleeve 6 connected with the cylinder body of the first linear driving mechanism 21 rolls towards the direction of the vertical supporting leg, the lower oil tube groove 53 and the second hard tube group synchronously move towards the direction of the vertical supporting leg, and the connecting section of the drag chain 52 and the lower oil tube groove 53 performs crawler-type motion towards the direction of the vertical supporting leg;
when the second-stage supporting leg 12 and the third-stage supporting leg 13 extend out, the second hard pipe group, the upper oil pipe groove 51 and the roller sleeve 6 are kept static, the lower oil pipe groove 53, the second hard pipe group and the third-stage supporting leg 13 are relatively static, the whole body moves towards the direction of the vertical supporting leg, and the drag chain 52 and the hose perform crawler-type horizontal movement towards the direction of the vertical supporting leg. The moving parts move in opposite directions when the telescoping legs are retracted.
The beneficial effects of present case:
1. the horizontal telescopic leg mechanism 1, the support leg telescopic linear driving mechanism 2 and the oil line pipe group 4 can be independently installed respectively and then integrally assembled, so that the installation efficiency of the horizontal telescopic leg mechanism 1 is effectively improved;
2. the upper oil pipe groove 51, the drag chain 52 and the lower oil pipe groove 53 are structurally designed, the support legs move stably when stretching, the friction loss in the stretching process is small, the failure rate is low, the service life is prolonged, and the after-sale maintenance cost is saved.
The disclosure of the present application also includes the following points:
(1) the drawings of the embodiments disclosed herein only relate to the structures related to the embodiments disclosed herein, and other structures can refer to general designs;
(2) in case of conflict, the embodiments and features of the embodiments disclosed in this application can be combined with each other to arrive at new embodiments;
the above embodiments are only embodiments disclosed in the present disclosure, but the scope of the disclosure is not limited thereto, and the scope of the disclosure should be determined by the scope of the claims.
Claims (7)
1. The built-in three-stage telescopic leg device comprises a horizontal telescopic leg mechanism, a support leg telescopic linear driving mechanism and an oil line pipe group connected with a vertical support leg oil cylinder;
the horizontal telescopic leg mechanism comprises a primary supporting leg, a secondary supporting leg and a tertiary supporting leg which are sequentially sleeved; the telescopic landing leg linear driving mechanism is characterized in that the oil line pipe group is arranged on one side of an inner cavity of the three-stage landing leg, and the landing leg telescopic linear driving mechanism is arranged on the other side of the inner cavity of the three-stage landing leg;
the oil line pipe group is connected to the vertical support oil cylinder through an upper oil pipe groove, a drag chain and a lower oil pipe groove in sequence;
one end of the upper oil pipe groove is fixedly connected with the chassis base, the other end of the upper oil pipe groove extends towards the direction of the vertical supporting leg, and the bottom of the upper oil pipe groove is supported by a roller sleeve which is matched and movably connected;
the roller sleeves are movably connected with the supporting leg telescopic linear driving mechanism through connecting rods;
the lower oil pipe groove is fixedly arranged at the bottom of the inner cavity of the third-stage supporting leg;
one end of the drag chain is fixedly arranged below the other end of the upper oil pipe groove at intervals;
the other end of the drag chain extends towards the direction of the chassis base and is fixedly connected with the side, close to the chassis base, of the lower oil pipe groove.
2. The built-in three-stage telescopic leg device according to claim 1, wherein the leg telescopic linear driving mechanism comprises a first linear driving mechanism, a second linear driving mechanism and a third linear driving mechanism;
the first-stage supporting leg extends out of the bottom of the base of the chassis through a first linear driving mechanism connected with the first-stage supporting leg;
the secondary supporting leg extends out of the primary supporting leg through a linear driving mechanism II connected with the secondary supporting leg;
the third-stage supporting leg extends out of the second-stage supporting leg through a linear driving mechanism III connected with the third-stage supporting leg, and then the vertical supporting leg extends out to a specified position.
3. The built-in three-stage telescopic leg device according to claim 2, wherein the roller is movably arranged on a cylinder body of the first linear driving mechanism through a connecting rod.
4. The built-in three stage telescoping leg device of claim 1, wherein said roller comprises a rolling body and a pair of flaps;
the rolling body is matched with the upper oil pipe groove;
the pair of baffle plates are symmetrically and fixedly arranged on the side parts of the rolling bodies and are positioned on the side parts of the upper oil pipe groove.
5. The built-in three-stage telescopic leg device as claimed in claim 4, wherein the blocking piece is circular and is detachably and fixedly arranged on the rolling body through a connecting piece.
6. The built-in three-stage telescopic leg device according to claim 1, wherein the oil line pipe group comprises a first hard pipe group, a hose group and a second hard pipe group which are communicated in sequence;
the second hard pipe group is fixedly arranged in the upper oil pipe groove, one end of the second hard pipe group is connected with the hydraulic control element of the vertical supporting leg, and the other end of the second hard pipe group is connected with one end of the hose group;
the second hard pipe group is fixedly arranged in the lower oil pipe groove, one end of the second hard pipe group is connected with the vertical supporting leg oil cylinder, and the other end of the second hard pipe group is connected with the other end of the hose group.
7. The built-in three-stage telescopic leg device according to claim 2, wherein the first linear driving mechanism, the second linear driving mechanism and the third linear driving mechanism are respectively an oil cylinder, an air cylinder or an electric push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122557885.3U CN215946580U (en) | 2021-10-22 | 2021-10-22 | Built-in three-stage telescopic leg device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122557885.3U CN215946580U (en) | 2021-10-22 | 2021-10-22 | Built-in three-stage telescopic leg device |
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| Publication Number | Publication Date |
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| CN215946580U true CN215946580U (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122557885.3U Active CN215946580U (en) | 2021-10-22 | 2021-10-22 | Built-in three-stage telescopic leg device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117208791A (en) * | 2023-09-25 | 2023-12-12 | 河南骏通车辆有限公司 | Double-support leg structure and automobile crane |
-
2021
- 2021-10-22 CN CN202122557885.3U patent/CN215946580U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117208791A (en) * | 2023-09-25 | 2023-12-12 | 河南骏通车辆有限公司 | Double-support leg structure and automobile crane |
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