CN216269187U - Front supporting leg telescopic assembly and engineering machinery - Google Patents
Front supporting leg telescopic assembly and engineering machinery Download PDFInfo
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- CN216269187U CN216269187U CN202122925116.4U CN202122925116U CN216269187U CN 216269187 U CN216269187 U CN 216269187U CN 202122925116 U CN202122925116 U CN 202122925116U CN 216269187 U CN216269187 U CN 216269187U
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Abstract
The utility model provides a front supporting leg telescopic assembly and engineering machinery, and relates to the technical field of engineering machinery. The front supporting leg telescopic assembly comprises a supporting leg seat, a first-stage front supporting leg, a second-stage front supporting leg, a third-stage front supporting leg, a first-stage oil cylinder and a binding oil cylinder. According to the front supporting leg telescopic assembly, the primary oil cylinder and the binding oil cylinder are adopted, and the primary oil cylinder and the binding oil cylinder independently supply oil to move, so that the simultaneous telescopic movement of all levels of supporting legs is realized, the telescopic movement of the supporting legs is accelerated, and the movement efficiency is obviously improved; the primary oil cylinder and the binding oil cylinder are both positioned in the cavity of the supporting leg so as to avoid the expansion and contraction of the supporting leg from being blocked; when the second-stage front supporting leg stretches relative to the first-stage front supporting leg, the guide wheel rolls along the cylinder body of the outer oil cylinder, so that the binding oil cylinder moves along the direction limited by the guide wheel, and the binding oil cylinder is prevented from deflecting in the moving process; the pin shaft moves in the strip hole along the longitudinal direction, so that the first-stage oil cylinder and the binding oil cylinder can swing in a small range, and the bending damage caused by resistance on the inner oil cylinder and the binding oil cylinder is avoided.
Description
Technical Field
The utility model relates to the technical field of engineering machinery, in particular to a front supporting leg telescopic assembly and engineering machinery.
Background
Vehicle chassis of engineering machinery such as a concrete pump truck and the like are generally provided with telescopic supporting legs, for example, a supporting chassis of the concrete pump truck is generally provided with four supporting legs which are arranged in an X shape. The telescopic landing leg is multistage landing leg, before construction operation and construction completion back, and multistage landing leg is stretched out or is retracted by the drive of flexible subassembly, sets up the support cylinder on the last grade landing leg, and the end of support cylinder sets up the supporting disk, so that the supporting disk contacts ground after the support cylinder extension. The telescopic assembly is mainly in an oil cylinder transmission mode, and the telescopic assembly drives the telescopic multi-stage supporting legs to stretch out and draw back through the stretching of the oil cylinder. At present, the support leg of the concrete pump truck is generally a three-stage support leg and realizes the extension and retraction of the three-stage support leg through the action of a three-stage oil cylinder, the extension or retraction action of the three-stage oil cylinder is slow, the action efficiency is low, and the extension and retraction action of the support leg is slow; and, the one-level hydro-cylinder generally arranges in the outside that supports on the bottom and be located the landing leg, and the flexible direction of one-level hydro-cylinder produces great moment of torsion to tertiary landing leg, makes one side clearance between the landing leg great and relative opposite side closely laminate, makes the landing leg flexible obstructed, and the landing leg produces the noise of "creak when flexible. In addition, in the long-term use process, the coaxiality of all levels of supporting legs during assembly is difficult to guarantee all the time, and the longitudinal gap between all levels of supporting legs is different from the gap size during assembly, so that the oil cylinder can be subjected to resistance to cause bending damage in the telescopic process of the supporting legs.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a front supporting leg telescopic assembly and engineering machinery, and aims to solve the technical problems that telescopic action of supporting legs is slow and telescopic of the supporting legs is blocked.
In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
a front supporting leg telescopic component comprises a supporting leg seat, a first-stage front supporting leg, a second-stage front supporting leg, a third-stage front supporting leg, a first-stage oil cylinder and a binding oil cylinder;
the three of the first-stage front supporting leg, the second-stage front supporting leg and the third-stage front supporting leg are sequentially nested, the first-stage front supporting leg can stretch out and draw back relative to the supporting leg seat, the second-stage front supporting leg can stretch out and draw back relative to the first-stage front supporting leg, the third-stage front supporting leg can stretch out and draw back relative to the second-stage front supporting leg, and an inner cavity of the first-stage front supporting leg, the second-stage front supporting leg and the third-stage front supporting leg in the stretching process is defined as a supporting leg cavity;
the supporting leg seat is provided with an oil cylinder seat, and the oil cylinder seat is provided with a first hinge hole;
a first assembling seat is arranged at one end, close to the leg seat, in the first-stage front leg, and a second hinge hole and a third hinge hole are formed in the first assembling seat;
a second assembling seat is arranged at one end, close to the leg seat, in the second-stage front leg, and a fourth hinge hole is formed in the second assembling seat;
a third assembling seat is arranged at one end, far away from the leg seat, in the third-stage front leg, and a fifth hinge hole is formed in the third assembling seat;
the primary oil cylinder and the binding oil cylinder are both positioned in the supporting leg cavity;
the tail end of a telescopic rod of the primary oil cylinder is hinged with a first hinge hole through a first pin shaft, the first pin shaft can move longitudinally in the first hinge hole, and a cylinder body of the primary oil cylinder is hinged with a second hinge hole through a second pin shaft;
the binding oil cylinder comprises an inner oil cylinder and an outer oil cylinder, the cylinder body of the inner oil cylinder is fixedly connected with the cylinder body of the outer oil cylinder, the cylinder body of the outer oil cylinder is hinged with a fourth hinge hole through a third pin shaft, the tail end of a telescopic rod of the inner oil cylinder is hinged with the third hinge hole through the fourth pin shaft, and the tail end of the telescopic rod of the outer oil cylinder is hinged with a fifth hinge hole through a fifth pin shaft.
Preferably, the first hinge hole is a strip hole arranged along the longitudinal direction, the second hinge hole is a circular hole, the third hinge hole is a strip hole arranged along the longitudinal direction, the fourth hinge hole is a circular hole, and the fifth hinge hole is a strip hole arranged along the longitudinal direction.
Preferably, one end of the cylinder body of the primary oil cylinder, which is far away from the leg base, is rotatably connected with a guide wheel, and when the secondary front supporting leg stretches relative to the primary front supporting leg, the guide wheel can roll along the cylinder body of the outer oil cylinder.
Preferably, one end of the cylinder body of the primary oil cylinder, which is far away from the supporting leg seat, is provided with a supporting plate, the left side and the right side of the supporting plate are respectively connected with a guide wheel in a rotating manner, and the cylinder body of the outer oil cylinder is embedded into a space between the two guide wheels.
Preferably, the part of the guide wheel, which is in contact with the cylinder body of the outer oil cylinder, is set to be an arc-shaped surface, and when the guide wheel rolls along the cylinder body of the outer oil cylinder, the arc-shaped surface is matched with the profile of the cylinder body of the outer oil cylinder.
Preferably, one end of the first-stage front supporting leg, which is far away from the supporting leg seat, is provided with a first baffle, and when the first-stage front supporting leg retracts relative to the supporting leg seat, the first baffle abuts against the outer end of the supporting leg seat.
Preferably, a second baffle is arranged at one end, far away from the leg base, of the secondary front supporting leg, and when the secondary front supporting leg retracts relative to the primary front supporting leg, the second baffle abuts against one end, far away from the leg base, of the primary front supporting leg.
Preferably, the inner oil cylinder and the outer oil cylinder are arranged in a stacked and parallel mode, and the outer oil cylinder is located above the inner oil cylinder.
The engineering machine comprises a vehicle chassis, wherein the front supporting leg telescopic assembly is arranged on the vehicle chassis.
Preferably, the engineering machinery is set as a concrete pump truck.
The beneficial technical effects of the utility model are as follows:
according to the front supporting leg telescopic assembly and the engineering machinery, the primary oil cylinder and the binding oil cylinder are adopted, and the primary oil cylinder and the binding oil cylinder are independently used for supplying oil, so that simultaneous telescopic action of all levels of supporting legs is realized, the telescopic action of the supporting legs is accelerated, and the action efficiency is obviously improved; the primary oil cylinder and the binding oil cylinder are both positioned in the cavity of the supporting leg, so that the torque generated by the extension direction of the primary oil cylinder and the binding oil cylinder to the supporting leg is smaller, the phenomenon that one side between the supporting legs has a larger clearance and the opposite side is tightly attached is avoided, the extension and retraction of the supporting legs are prevented from being blocked, and the noise generated by the supporting legs during extension and retraction is further avoided; in addition, in the telescopic process of the supporting legs, if the coaxiality of all levels of supporting legs during assembly is difficult to guarantee, when the two-level front supporting legs are telescopic relative to the one-level front supporting legs, the guide wheels roll along the cylinder body of the outer oil cylinder, so that the binding oil cylinder moves along the direction limited by the guide wheels, and the binding oil cylinder is prevented from deflecting in the moving process; when the primary front supporting leg stretches relative to the supporting leg seat, the tail end of a telescopic rod of the primary oil cylinder longitudinally moves in the first hinge hole through the first pin shaft, so that the primary oil cylinder can swing in a small range, and the bending damage caused by resistance on the primary oil cylinder is avoided; when the second-stage front supporting leg is telescopic relative to the first-stage front supporting leg and the third-stage front supporting leg is telescopic relative to the second-stage front supporting leg, the tail end of a telescopic rod of the inner oil cylinder longitudinally moves in the third hinge hole through the fourth pin shaft, so that the inner oil cylinder (the binding oil cylinder is close to one side of the inner oil cylinder) can swing in a small range, and the inner oil cylinder is prevented from being bent and damaged due to resistance; the tail end of a telescopic rod of the outer oil cylinder longitudinally moves in a fifth hinge hole through a fifth pin shaft, so that the outer oil cylinder (one side of the binding oil cylinder close to the outer oil cylinder) can swing in a small range, and the outer oil cylinder is prevented from being bent and damaged due to resistance; in addition, the one end complex hinge hole of one-level hydro-cylinder is the circular port, and the other end complex hinge hole of one-level hydro-cylinder is rectangular hole, and the assembly of the one-level hydro-cylinder of being convenient for is fixed, and the middle complex hinge hole of binding the hydro-cylinder is the circular port, and the hinge hole of binding hydro-cylinder both ends complex is rectangular hole, also is convenient for bind the assembly of hydro-cylinder fixed.
Drawings
FIG. 1 is a perspective view of a front leg extension assembly in accordance with an embodiment of the present invention;
FIG. 2 is a top view of a front leg extension assembly in accordance with an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a front leg extension assembly in accordance with an embodiment of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is an enlarged view of a portion of FIG. 3 at B;
FIG. 6 is a front view of the primary cylinder and the binding cylinder in cooperation in accordance with an embodiment of the present invention;
FIG. 7 is a top view of the primary cylinder and the tie-up cylinder in accordance with an embodiment of the present invention;
FIG. 8 is an enlarged view of a portion of FIG. 7 at C;
fig. 9 is a perspective view of a guide wheel portion of an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings in combination with the specific embodiments. Certain embodiments of the utility model now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. Indeed, various embodiments of the utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In an embodiment of the present invention, a front leg stretching assembly is provided, please refer to fig. 1 to 9.
A front supporting leg telescopic assembly comprises a supporting leg seat, a first-stage front supporting leg 11, a second-stage front supporting leg 12, a third-stage front supporting leg 13, a first-stage oil cylinder 2, a binding oil cylinder 3 and the like.
The support leg seat is provided with an oil cylinder seat, the oil cylinder seat is provided with a first hinge hole, and the first hinge hole is a strip hole which is longitudinally arranged. The first hinge hole is not shown in the drawings, and has the same shape as the third hinge hole 52 and the fifth hinge hole 54.
Inside one end that is close to the landing leg seat of landing leg 11 before the one-level sets up first assembly seat 41, offers second hinge hole 51 and third hinge hole 52 on the first assembly seat 41, and wherein, second hinge hole 51 is the circular port, and third hinge hole 52 is the rectangular hole along longitudinal arrangement.
Inside one end that is close to the landing leg seat of landing leg seat before the second grade of 12 sets up second assembly seat 42, offers fourth hinge hole 53 on the second assembly seat 42, and fourth hinge hole 53 sets up to the circular port.
The third-stage front supporting leg 13 is provided with a third assembling seat 43 at one end far away from the supporting leg seat, the third assembling seat 43 is provided with a fifth hinge hole 54, and the fifth hinge hole 54 is a strip hole arranged along the longitudinal direction.
The end of the telescopic rod of the one-level oil cylinder 2 is provided with a first pin shaft hole 61, the first pin shaft hole 61 is a circular hole, the first pin shaft hole 61 is hinged with a first hinge hole through a first pin shaft, the first pin shaft can move longitudinally in the first hinge hole, one end of the cylinder body of the one-level oil cylinder 2 close to the supporting leg seat is provided with a second pin shaft hole 62, the second pin shaft hole 62 is a circular hole, and the second pin shaft hole 62 is hinged with a second hinge hole 51 through a second pin shaft.
The binding oil cylinder 3 comprises an inner oil cylinder 31 and an outer oil cylinder 32, the inner oil cylinder 31 and the outer oil cylinder 32 are arranged in a stacked and parallel mode, and the outer oil cylinder 32 is located above the inner oil cylinder 31, so that the overall structure of the binding oil cylinder 3 is compact. The cylinder body of the inner oil cylinder 31 is fixedly connected with the cylinder body of the outer oil cylinder 32, the telescopic rod of the inner oil cylinder 31 faces the direction of the supporting leg seat, and the telescopic rod of the outer oil cylinder 32 deviates from the direction of the supporting leg seat. A third pin shaft hole 63 is formed in one end, close to the leg base, of the cylinder body of the outer oil cylinder 32, the third pin shaft hole 63 is a circular hole, and the third pin shaft hole 63 is hinged to the fourth hinge hole 53 through a third pin shaft; the tail end of the telescopic rod of the inner oil cylinder 31 is provided with a fourth pin shaft hole 64, the fourth pin shaft hole 64 is a circular hole, and the fourth pin shaft hole 64 is hinged with the third hinge hole 52 through a fourth pin shaft; the telescopic link end of outer hydro-cylinder 32 sets up fifth round pin shaft hole 65, and fifth round pin shaft hole 65 is the circular port, and fifth round pin shaft hole 65 articulates fifth hinge hole 54 through the fifth round pin axle.
The front supporting leg telescopic assembly adopts a primary oil cylinder 2 and a binding oil cylinder 3, the primary oil cylinder 2 independently supplies oil for action, the inner oil cylinder 31 independently supplies oil for action, and the outer oil cylinder 32 independently supplies oil for action. The primary oil cylinder 2 independently supplies oil to drive the primary front supporting leg 11 to extend and retract relative to the supporting leg seat; the inner oil cylinder 31 independently supplies oil to drive the second-stage front supporting leg 12 to extend and retract relative to the first-stage front supporting leg 11; the outer oil cylinder 32 independently supplies oil to drive the three-stage front supporting leg 13 to extend and retract relative to the two-stage front supporting leg 12. Landing leg 11 before one-level, landing leg 12 before the second grade and landing leg 13 before the third grade can realize stretching out and drawing back simultaneously, and landing leg 11 before one-level, landing leg 12 before the second grade and landing leg 13 before the third grade also can stretch out and draw back alone, so, make the flexible action of landing leg accelerate, action efficiency is showing and is improving.
At present, in the long-term use process of telescopic multi-stage supporting legs, coaxiality of all stages of supporting legs during assembly is difficult to guarantee all the time, and longitudinal gaps among all stages of supporting legs are different from the size of the gaps during assembly, so that oil cylinders in the supporting legs can be bent and damaged due to resistance in the telescopic process of the supporting legs. According to the front supporting leg telescopic assembly, when the primary front supporting leg 11 is telescopic relative to the supporting leg seat, the tail end of the telescopic rod of the primary oil cylinder 2 longitudinally moves in the first hinge hole through the first pin shaft, so that the primary oil cylinder 2 can swing in a small range, and the bending damage caused by resistance on the primary oil cylinder 2 is avoided; when the second-stage front supporting leg 12 extends and retracts relative to the first-stage front supporting leg 11 and the third-stage front supporting leg 13 extends and retracts relative to the second-stage front supporting leg 12, the tail end of the expansion rod of the inner oil cylinder 31 longitudinally moves in the third hinge hole 52 through the fourth pin shaft, so that the inner oil cylinder 31 (one side of the binding oil cylinder close to the inner oil cylinder) can swing in a small range, and the inner oil cylinder 31 is prevented from being bent and damaged due to resistance; the tail end of the telescopic rod of the outer oil cylinder 32 longitudinally moves in the fifth hinge hole 54 through the fifth pin shaft, so that the outer oil cylinder 32 (the binding oil cylinder is close to one side of the outer oil cylinder) can swing in a small range, and the outer oil cylinder 32 is prevented from being bent and damaged due to resistance.
In addition, the one end complex hinge hole of one-level hydro-cylinder 2 is the circular port, and the other end complex hinge hole of one-level hydro-cylinder 2 is rectangular hole, and when the fixed one-level hydro-cylinder 2 of assembly, the fixed hinge hole of assembly is the one end of circular port earlier, and the fixed hinge hole of reassembling is the one end of rectangular hole, and axiality precision when needn't excessively require the assembly of one-level hydro-cylinder 2 to the assembly of one-level hydro-cylinder 2 is fixed. The middle matched hinge hole of the binding oil cylinder 3 is a circular hole, the two ends matched hinge holes of the binding oil cylinder 3 are rectangular holes, when the binding oil cylinder 3 is assembled and fixed, the middle position of the circular hole is assembled and fixed, and then the two ends of the rectangular hole are assembled and fixed, and the coaxiality precision of the binding oil cylinder 3 during assembling is not required too much, so that the binding oil cylinder 3 can be assembled and fixed.
One end of the cylinder body of the primary oil cylinder 2, which is far away from the supporting leg seat, is rotatably connected with a guide wheel 71, and when the secondary front supporting leg 12 extends and contracts relative to the primary front supporting leg 11, the guide wheel 71 can roll along the cylinder body of the outer oil cylinder 32. The guide wheel 71 rolls along the cylinder body of the outer oil cylinder 32, so that the binding oil cylinder 3 moves along the direction limited by the guide wheel 71, and the binding oil cylinder 3 is prevented from deflecting in the moving process.
Specifically, one end of the cylinder body of the primary oil cylinder 2, which is far away from the leg base, is provided with two support plates 72, a space is left between the two support plates 72, and the space between the two support plates 72 is adjusted according to the width of the cylinder body of the outer oil cylinder 32, so as to adjust the space between the two guide wheels 71, and thus the space between the two guide wheels 71 can be embedded into the cylinder body of the outer oil cylinder 32. The upper ends of the two supporting plates 72 are provided with one end of the cylinder body of the primary oil cylinder 2, which is far away from the supporting leg seat, the left sides of the lower ends of the two supporting plates 72 are rotatably connected with a guide wheel 71, the right sides of the lower ends of the two supporting plates 72 are rotatably connected with a guide wheel 71, and the cylinder body of the outer oil cylinder 32 is embedded into a space between the two guide wheels 71. In this embodiment, the two guide wheels 71 are connected by an assembly pin 73, a boss is disposed at one end of the assembly pin 73, and a blocking piece 74 and a screw 75 are sequentially assembled at the other end of the assembly pin 73 for fixation.
Preferably, the portion of the guide wheel 71 contacting the cylinder body of the outer cylinder 32 is configured as an arc-shaped surface, and the arc-shaped surface matches the cylinder body profile of the outer cylinder 32 when the guide wheel 71 rolls along the cylinder body of the outer cylinder 32. In this way, the two guide wheels 71 can dynamically fit the cylinder body of the outer cylinder 32 together, and the two guide wheels 71 together accurately define the moving direction of the outer cylinder 32.
The first baffle 81 is arranged at one end of the first-stage front leg 11 far away from the leg seat, and when the first-stage front leg 11 retracts relative to the leg seat, the first baffle 81 abuts against the outer end of the leg seat, so that the moving stroke of the first-stage front leg 11 during retraction is limited. The second baffle 82 is arranged at one end of the second-stage front leg 12 far away from the leg base, and when the second-stage front leg 12 retracts relative to the first-stage front leg 11, the second baffle 82 abuts against one end of the first-stage front leg 11 far away from the leg base, so that the moving stroke of the second-stage front leg 12 during retraction is limited.
And one end of the third-stage front supporting leg 13, which is far away from the supporting leg seat, is provided with a supporting oil cylinder seat 83, and the supporting oil cylinder seat 83 is used for assembling a supporting oil cylinder.
The embodiment of the utility model also provides engineering machinery, wherein the engineering machinery is preferably a concrete pump truck, a truck chassis is arranged on the concrete pump truck, and the front support leg telescopic assembly is arranged on the truck chassis.
Up to this point, the present embodiment has been described in detail with reference to the accompanying drawings. From the above description, those skilled in the art should clearly recognize that there is a front leg extension assembly of the present invention. The front supporting leg telescopic assembly is applied to engineering machinery, a primary oil cylinder 2 and a binding oil cylinder 3 are adopted, and the primary oil cylinder 2 and the binding oil cylinder 3 independently supply oil to move, so that the simultaneous telescopic movement of all levels of supporting legs is realized, the telescopic movement of the supporting legs is accelerated, and the movement efficiency is obviously improved; the primary oil cylinder 2 and the binding oil cylinder 3 are both positioned in the cavity of the supporting leg, so that the torque generated by the telescopic directions of the primary oil cylinder 2 and the binding oil cylinder 3 to the supporting leg is smaller, the phenomenon that one side between the supporting legs has a larger clearance and the opposite side is tightly attached is avoided, the telescopic effect of the supporting legs is avoided, and the noise generated when the supporting legs are telescopic is further avoided; in addition, in the process of telescopic supporting legs, if the coaxiality of all levels of supporting legs during assembly is difficult to guarantee, when the second-level front supporting leg 12 is telescopic relative to the first-level front supporting leg 11, the guide wheel 71 rolls along the cylinder body of the outer oil cylinder 32, so that the binding oil cylinder 3 moves along the direction limited by the guide wheel 71, and the binding oil cylinder 3 is prevented from deflecting in the moving process; when the first-stage front supporting leg 11 stretches relative to the supporting leg seat, the tail end of a telescopic rod of the first-stage oil cylinder 2 longitudinally moves in the first hinge hole through the first pin shaft, so that the first-stage oil cylinder 2 can swing in a small range, and the bending damage caused by resistance on the first-stage oil cylinder 2 is avoided; when the second-stage front supporting leg 12 extends and retracts relative to the first-stage front supporting leg 11 and the third-stage front supporting leg 13 extends and retracts relative to the second-stage front supporting leg 12, the tail end of the expansion rod of the inner oil cylinder 31 longitudinally moves in the third hinge hole 52 through the fourth pin shaft, so that the inner oil cylinder 31 (the binding oil cylinder 3 is close to one side of the inner oil cylinder 31) can swing in a small range, and the inner oil cylinder 31 is prevented from being bent and damaged due to resistance; the tail end of the telescopic rod of the outer oil cylinder 32 longitudinally moves in the fifth hinge hole 54 through a fifth pin shaft, so that the outer oil cylinder 32 (the binding oil cylinder 3 is close to one side of the outer oil cylinder 32) can swing in a small range, and the outer oil cylinder 32 is prevented from being bent and damaged due to resistance; in addition, the one end complex hinge hole of one-level hydro-cylinder 2 is the circular port, and the other end complex hinge hole of one-level hydro-cylinder 2 is rectangular hole, and the assembly of the one-level hydro-cylinder 2 of being convenient for is fixed, and the hinge hole of the middle complex of binding hydro-cylinder 3 is the circular port, and the hinge hole of binding hydro-cylinder 3 both ends complex is rectangular hole, also is convenient for bind the assembly of hydro-cylinder 3 fixed.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preceding leg subassembly that stretches out and draws back which characterized in that: comprises a supporting leg seat, a first-stage front supporting leg, a second-stage front supporting leg, a third-stage front supporting leg, a first-stage oil cylinder and a binding oil cylinder;
the three of the first-stage front supporting leg, the second-stage front supporting leg and the third-stage front supporting leg are sequentially nested, the first-stage front supporting leg can stretch out and draw back relative to the supporting leg seat, the second-stage front supporting leg can stretch out and draw back relative to the first-stage front supporting leg, the third-stage front supporting leg can stretch out and draw back relative to the second-stage front supporting leg, and an inner cavity of the first-stage front supporting leg, the second-stage front supporting leg and the third-stage front supporting leg in the stretching process is defined as a supporting leg cavity;
the supporting leg seat is provided with an oil cylinder seat, and the oil cylinder seat is provided with a first hinge hole;
a first assembling seat is arranged at one end, close to the leg seat, in the first-stage front leg, and a second hinge hole and a third hinge hole are formed in the first assembling seat;
a second assembling seat is arranged at one end, close to the leg seat, in the second-stage front leg, and a fourth hinge hole is formed in the second assembling seat;
a third assembling seat is arranged at one end, far away from the leg seat, in the third-stage front leg, and a fifth hinge hole is formed in the third assembling seat;
the primary oil cylinder and the binding oil cylinder are both positioned in the supporting leg cavity;
the tail end of a telescopic rod of the primary oil cylinder is hinged with a first hinge hole through a first pin shaft, the first pin shaft can move longitudinally in the first hinge hole, and a cylinder body of the primary oil cylinder is hinged with a second hinge hole through a second pin shaft;
the binding oil cylinder comprises an inner oil cylinder and an outer oil cylinder, the cylinder body of the inner oil cylinder is fixedly connected with the cylinder body of the outer oil cylinder, the cylinder body of the outer oil cylinder is hinged with a fourth hinge hole through a third pin shaft, the tail end of a telescopic rod of the inner oil cylinder is hinged with the third hinge hole through the fourth pin shaft, and the tail end of the telescopic rod of the outer oil cylinder is hinged with a fifth hinge hole through a fifth pin shaft.
2. A front leg extension assembly according to claim 1, wherein: the first hinge hole is a strip hole arranged longitudinally, the second hinge hole is a circular hole, the third hinge hole is a strip hole arranged longitudinally, the fourth hinge hole is a circular hole, and the fifth hinge hole is a strip hole arranged longitudinally.
3. A front leg extension assembly according to claim 1, wherein: one end of the cylinder body of the first-stage oil cylinder, which is far away from the supporting leg seat, is rotatably connected with a guide wheel, and when the second-stage front supporting leg stretches relative to the first-stage front supporting leg, the guide wheel can roll along the cylinder body of the outer oil cylinder.
4. A front leg extension assembly according to claim 3, wherein: one end of the cylinder body of the first-stage oil cylinder, which is far away from the supporting leg seat, is provided with a supporting plate, the left side and the right side of the supporting plate are respectively connected with a guide wheel in a rotating way, and the cylinder body of the outer oil cylinder is embedded into a space between the two guide wheels.
5. A front leg extension assembly according to claim 4 wherein: the part of the guide wheel, which is contacted with the cylinder body of the outer oil cylinder, is set to be an arc-shaped surface, and when the guide wheel rolls along the cylinder body of the outer oil cylinder, the arc-shaped surface is matched with the outline of the cylinder body of the outer oil cylinder.
6. A front leg extension assembly according to claim 1, wherein: the one end that the landing leg seat was kept away from to landing leg before the one-level is provided with first baffle, and when the landing leg was for the landing leg seat withdrawal before the one-level, first baffle butt was in the outer end of landing leg seat.
7. A front leg extension assembly according to claim 6, wherein: the one end that the landing leg seat was kept away from to landing leg before the second grade is provided with the second baffle, and when the landing leg was retracted before the second grade for the landing leg before the one-level, the one end that the landing leg seat was kept away from to the landing leg was held in the butt of second baffle before the one-level.
8. A front leg extension assembly according to claim 1, wherein: the inner oil cylinder and the outer oil cylinder are arranged in a stacked and parallel mode, and the outer oil cylinder is located above the inner oil cylinder.
9. A construction machine comprising a vehicle chassis, characterized in that: a front leg extension assembly as claimed in any one of claims 1 to 8 is provided on the vehicle chassis.
10. A working machine according to claim 9, characterized in that: the engineering machinery is set as a concrete pump truck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122925116.4U CN216269187U (en) | 2021-11-25 | 2021-11-25 | Front supporting leg telescopic assembly and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122925116.4U CN216269187U (en) | 2021-11-25 | 2021-11-25 | Front supporting leg telescopic assembly and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216269187U true CN216269187U (en) | 2022-04-12 |
Family
ID=81039627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122925116.4U Active CN216269187U (en) | 2021-11-25 | 2021-11-25 | Front supporting leg telescopic assembly and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216269187U (en) |
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2021
- 2021-11-25 CN CN202122925116.4U patent/CN216269187U/en active Active
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