CN212313505U

CN212313505U - Supporting leg

Info

Publication number: CN212313505U
Application number: CN202020929383.1U
Authority: CN
Inventors: 吴志强; 杨旻瑞
Original assignee: Guangdong Fuwa Heavy Industry Co Ltd
Current assignee: Guangdong Fuwa Heavy Industry Co Ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-01-08
Anticipated expiration: 2030-05-28

Abstract

A landing leg comprises an inner landing leg, an outer landing leg, a nut, a screw rod and a transmission assembly, wherein the transmission assembly comprises a transmission shaft, a first driven gear and a movable rod, the transmission shaft is provided with the first transmission gear and a second transmission gear, the screw rod is provided with the second driven gear, the second transmission gear and the second driven gear are both meshed with the first driven gear, the first driven gear is provided with a first matching part, the movable rod is provided with a driving gear and a second matching part, the movable rod is movably connected on the outer landing leg in a penetrating way and can move between a first position close to the first driven gear and a second position far away from the first driven gear, when the gear is at the first position, the driving gear is separated from the first transmission gear and the first matching part is matched with the second matching part, when the first matching part is in the first position, the first matching part is meshed with the first transmission gear, and the second matching part is meshed with the second matching part. The utility model discloses can enough realize the switching of the fast shelves that the landing leg goes up and down and slow down shelves, and simple structure, occupation space is little.

Description

Supporting leg

Technical Field

The utility model relates to a vehicle accessory technical field, concretely relates to landing leg.

Background

The legs are generally used to support the semitrailer, and when the trailer is disconnected from the tractor, the legs provide the necessary support for the semitrailer; the common support legs usually comprise an inner support leg, an outer support leg, a screw rod and a nut, wherein the nut is arranged on the inner support leg, the screw rod is connected to the nut in a penetrating manner, a transmission mechanism arranged in the outer support leg drives the screw rod to rotate, and then the inner support leg and the outer support leg are made to stretch and retract through a screw rod nut mechanism, the traditional transmission mechanism is usually a gear transmission mechanism, and power is transmitted to the screw rod under the driving of an external handle. Traditional landing leg only can adjust the lift of landing leg under a speed, therefore accommodation process is comparatively loaded down with trivial details, and can not make accurate adjustment to the lift height of landing leg.

In order to overcome the defects of the traditional supporting legs, the transmission mechanisms in the supporting legs can be shifted according to needs, when the height of the supporting legs is required to be adjusted rapidly, the transmission mechanisms are adjusted to be in a fast gear, when the height of the supporting legs is required to be adjusted accurately, the transmission mechanisms are adjusted to be in a slow gear, the structure of the transmission mechanisms is complex, and the occupied space in the supporting legs is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a landing leg, it can realize fast, the switching slowly of landing leg altitude mixture control, and simple structure, and occupation space is little to prior art not enough.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a landing leg comprises an inner landing leg, an outer landing leg sleeved outside the inner landing leg, a nut installed on the inner landing leg, a screw rod connected in the nut in a penetrating manner and in threaded fit with the nut, and a transmission assembly installed on the outer landing leg, wherein the transmission assembly comprises a transmission shaft pivoted on the outer landing leg, a first driven gear pivoted on the outer landing leg, and a movable rod, one end of the transmission shaft is provided with a first transmission gear, the other end of the transmission shaft is provided with a second transmission gear, the screw rod is provided with a second driven gear, the first driven gear is arranged between the second transmission gear and the second driven gear, the second transmission gear and the second driven gear are both meshed with the first driven gear, the first driven gear is provided with a first matching part, the movable rod is provided with a driving gear and a second matching part matched with the first matching part, the movable rod is movably connected on the outer landing leg in a penetrating manner and can move between a first position close to the first driven gear and a second position far away from the first driven gear, when the movable rod is located at the first position, the driving gear is separated from the first transmission gear, the first matching part is matched with the second matching part to synchronously connect the movable rod with the first driven gear, and when the movable rod is located at the second position, the first matching part is separated from the second matching part, and the driving gear is meshed with the first transmission gear.

The first matching part is a plurality of first convex teeth arranged on the first driven gear, the second matching part is a plurality of second convex teeth arranged at the inner side end of the movable rod, and the second convex teeth can be meshed with or separated from the first convex teeth when the movable rod moves transversely.

The two sides of the end parts of the first convex tooth and the second convex tooth are respectively provided with a guide inclined plane.

The second driven gear is a bevel gear, and a bevel gear surface meshed with the bevel gear and a straight gear surface meshed with the second transmission gear are arranged on the first driven gear.

The diameter of the first transmission gear is larger than that of the second transmission gear.

The outer leg is pivoted with a pivot, the first driven gear is synchronously connected with the pivot, and the axis of the pivot is superposed with the axis of the movable rod.

The movable rod is provided with an insertion groove extending outwards from the end face of the inner side of the movable rod, the end of the inner side of the pivot is provided with an insertion end, and when the movable rod is located at the first position, the insertion end is connected in the insertion groove in a penetrating mode.

A shaft sleeve is fixed on the outer supporting leg, and the movable rod is connected in the shaft sleeve in a penetrating mode.

A clamping component is also arranged between the movable rod and the shaft sleeve and is used for clamping the movable rod at the first position or the second position.

The clamping assembly comprises a steel ball and a spring, a mounting groove extending along the radial direction is formed in the movable rod, the spring is arranged in the mounting groove, the steel ball is located at the outer side end of the spring, the spring is used for providing elastic stress for pushing the steel ball outwards, two annular grooves are formed in the inner wall of the shaft sleeve, when the movable rod is located at the first position, the steel ball is embedded in one of the annular grooves, and when the movable rod is located at the second position, the steel ball is embedded in the other annular groove.

The beneficial effects of the utility model reside in that:

compared with the prior art, the utility model discloses the horizontal push-and-pull dwang of accessible makes the dwang and the separation and the combination of first driven gear, changes the power transmission order of each gear of drive assembly on the outer landing leg to can realize the switching of the fast shelves that the landing leg goes up and down and slow shelves, simultaneously, its simple structure, occupation space is little.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view of the present invention, illustrating an operating state of the present invention;

fig. 3 is a schematic view of another working state of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1 and 2, for the present invention, the landing leg comprises an inner landing leg 20, an outer landing leg 10, a nut 21, a screw rod 11, and a transmission assembly, wherein the outer landing leg 10 is sleeved outside the inner landing leg 20, the two form a telescopic structure, the nut 21 is fixedly connected to the top end portion of the inner landing leg 20, the screw rod 11 extends along the height direction of the landing leg, is connected in the nut 21 in a penetrating manner, and is in threaded fit with the nut 21, the transmission assembly is installed on the outer landing leg 10, and is used for driving the screw rod 11 to rotate, and then driving the nut 21 to move up and down, so that the telescopic structure formed by the inner landing leg 20 and the outer landing leg 10 is extended or shortened; the transmission assembly includes a transmission shaft 50, a first driven gear 40, and a movable rod 30, wherein, a second driven gear 12 is mounted on the top end of the screw rod 11, a transmission shaft 50 extends in the transverse direction of the outer leg 10 and is pivotally engaged with the outer leg 10, a first transmission gear 51 is installed at one end of the transmission shaft 50, a second transmission gear 52 is installed at the other end of the transmission shaft 50, the first transmission gear 51 and the second transmission gear 52 are all located inside the outer leg 10, the first driven gear 40 is pivoted on the outer leg 10 and located inside the outer leg 10, and at the same time, the first driven gear 40 is disposed between the second transmission gear 52 and the second driven gear 12, the second transmission gear 62 and the second driven gear 12 are both meshed with the first driven gear 40, and further, a plurality of convex teeth 41 are arranged on the inner side (i.e. the side facing the inside of the outer leg 10) end surface of the first driven gear 40; the movable rod 30 is transversely connected to the outer leg 10 from outside to inside, that is, the inner end of the movable rod 30 extends into the outer leg 10, the outer end is located outside the outer leg 10 and is used for connecting a rocker of the leg, the movable rod 30 can rotate relative to the outer leg 10 and can reciprocate along the transverse direction of the outer leg 10, the movable rod 30 is provided with a driving gear 31, the inner end surface of the movable rod 30 is provided with a plurality of convex teeth 32, the convex teeth 32 are matched with the convex teeth 41, the movable rod 30 can move towards the inner side of the outer leg 10 to a first position abutting against the first driven gear 40, meanwhile, the movable rod 30 can also move towards the outer side of the outer leg 10 to a second position away from the first driven gear 40, that is, the movable rod 30 can move between the first position and the second position, as shown in fig. 3, when the movable rod 30 moves to the first position, the plurality of convex teeth 32 are meshed with the plurality of convex teeth 41, so that the movable rod 30 is synchronously connected with the first driven gear 40, at this time, the driving gear 31 on the movable rod 30 is separated from the first transmission gear 51, namely, the driving gear 31 is positioned at the inner side of the first transmission gear 51, and in the first position, power transmission can be carried out between the movable rod 30 and the first driven gear 40; as shown in fig. 2, when the movable lever 30 is at the second position, the driving gear 31 of the movable lever 30 is engaged with the first transmission gear 51, and the plurality of teeth 32 of the plurality of teeth 41 are disengaged, and at the second position, the power transmission between the movable lever 30 and the transmission shaft 50 is performed through the driving gear 31 and the first transmission gear 51, and the power transmission between the movable lever 30 and the first driven gear 40 is disconnected. Specifically, when the movable rod 30 is in the state shown in fig. 3, the external rocker drives the movable rod 30 to rotate, and then drives the first driven gear 40 to rotate, and the first driven gear 40 drives the second driven gear 12 to rotate, and then the inner leg 20 and the outer leg 10 are extended and retracted, and when the movable rod 30 is in the state shown in fig. 2, the external rocker drives the movable rod 30 to rotate, and drives the transmission shaft 50 to rotate through the driving gear 31 and the first transmission gear 51, and then the second transmission gear 52 on the transmission shaft 50 drives the first driven gear 40, and then the first driven gear 40 drives the second driven gear 12 to rotate, and finally the inner leg 20 and the outer leg 10 are extended and retracted.

The utility model discloses in, for the convenience of a plurality of dogteeth 32 and dogtooth 41 smooth interlock when the movable rod 30 is in the first position, the utility model discloses tip both sides at above-mentioned dogtooth 32 and dogtooth 41 set up the direction inclined plane respectively, and like this, make the draw-in groove between two adjacent dogteeth 32 be the V-arrangement of opening broad, and like this, the dogtooth 41 of being convenient for can imbed, and is same, and the draw-in groove that equally forms the V-arrangement between two adjacent dogteeth 41, through the guide on direction inclined plane, so that dogtooth 32 can imbed, even there is angular deviation movable rod 30 and first driven gear 40, when transversely promoting movable rod 30, movable rod 30 also can be linked with first driven gear 40.

The teeth 32 provided at the inner end of the movable rod 30 and the teeth 41 provided on the first driven gear 40 form a clutch structure, and when the teeth 32 and the teeth 40 are engaged, the power is transmitted in the order shown in fig. 3, and when the teeth 32 and the teeth 40 are disengaged, the power is transmitted in the order shown in fig. 2, and actually, other engaging portions may be provided on the movable rod 30 and the first driven gear 40, respectively, to replace the teeth 32 and the teeth 41, to achieve the above-described functions, as long as the movable rod 30 and the first driven gear 30 can be coupled and decoupled when the lateral displacement of the movable rod 30 and the first driven gear 30 is changed.

The utility model discloses in, second driven gear 12 is the bevel gear, is provided with bevel gear face 42 and straight tooth face 43 on the first driven gear 40, and wherein bevel gear face 42 and the meshing of second driven gear 12 make the axis of rotation of first driven gear 40 perpendicular with the central axis of lead screw 11, and straight tooth face 43 then meshes with second drive gear 52.

In the utility model, the diameter of the first transmission gear 51 is greater than the diameter of the second transmission gear 52, thus, under the state shown in fig. 2, the power of the movable rod 30 is transmitted to the first driven gear 40 through the transmission shaft 50, the transmission shaft 50 plays the roles of speed reduction and torque increase, the speed is slow, the accurate adjustment of the height of the supporting leg can be realized, the diameter of the driving gear 31 is less than the diameter of the first transmission gear 51, meanwhile, the diameter of the second transmission gear 52 is less than the diameter of the first driven gear 40, the transmission ratio is increased, so as to improve the adjustment precision under the slow speed; as shown in fig. 3, the power of the movable rod 30 is directly transmitted to the first driven gear 40, and the transmission shaft 50 idles in this state and does not participate in the power transmission, and in this state, the lower gear is shifted down, so that the height of the leg can be rapidly adjusted.

A pivot 44 is pivoted on the outer leg 10, the pivot 44 can be mounted on the outer leg 10 through a bearing, the first driven gear 40 is synchronously coupled on the pivot 44, and the axis of the pivot 44 is coincident with the axis of the movable rod 30; during installation, the first driven gear 40 is installed from the top of the outer leg 10, and then the pivot shaft 44 is inserted from the side of the outer leg 10 to be synchronously coupled with the first driven gear 40, so that the installation of the first driven gear 40 is facilitated. In addition, the movable rod 30 is provided with an insertion groove 301 extending outward from the inner end surface thereof, the inner end of the pivot 44 is provided with an insertion end 441, and when the movable rod 30 is located at the first position as shown in fig. 3, the insertion end 441 is inserted into the insertion groove 301, so that the movable rod 30 is connected with the pivot 44 to ensure that the two have high coaxiality, thereby effectively transmitting the power of the movable rod 30 to the first driven gear 40, and simultaneously avoiding the first driven gear 40 from deflecting when driving the second driven gear 12 to rotate.

The utility model discloses a in other embodiments, be fixed with a axle sleeve 13 on outer landing leg 10, the movable rod 30 cross-under is in axle sleeve 13, utilize this axle sleeve 13 to play the effect of direction to the lateral shifting of movable rod 30, and simultaneously, still be provided with the screens subassembly between axle sleeve 13 and movable rod 30, the screens subassembly is used for prescribing a limit to the position of movable rod 30, that is to say, when movable rod 30 is in primary importance or second place, the screens subassembly is used for avoiding movable rod 30 to take place lateral shifting under the effect of not receiving horizontal push-pull external force. Specifically, the locking assembly includes a steel ball 33 and a spring 34, a mounting groove extending along a radial direction of the movable rod 30 is formed on the movable rod 30, the spring 34 is located in the mounting groove, the steel ball 33 is located at an outer side end of the spring 34 and protrudes out of an outer surface of the movable rod 30, the steel ball 33 is always pushed towards an outer side of the movable rod 30 by an elastic stress of the spring 34, two annular grooves 131 which are transversely staggered are formed in an inner wall of the shaft sleeve 13, when the movable rod 30 is located at a first position, the steel ball 33 is embedded in the annular groove 131 located at an inner side of the outer leg 10, when the movable rod 30 is located at a second position, the steel ball 33 is embedded in the annular groove 131 located at an outer side of the outer leg 10, when the steel ball 33 is embedded in the annular groove 131, the movable rod 30 is rotated, the steel ball 33 can slide along the annular groove 131, so that the rotatable rod 30 can be rotated to, meanwhile, when the rotating rod 30 does not receive external forces of transverse pushing and pulling, the steel balls 33 are embedded in the annular groove 131 to limit the rotating rod 30, when the fast gear and the slow gear need to be switched, the rotating rod 30 is transversely pushed and pulled, the steel balls 33 extrude the springs 34, the springs are separated from the annular groove 131, and the rotating rod 30 can transversely move. Of course, the detent assembly is not limited to the structure of the steel ball 33 and the spring 34, but may be a spring pin or the like.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The supporting leg is characterized by comprising an inner supporting leg, an outer supporting leg sleeved outside the inner supporting leg, a nut installed on the inner supporting leg, a screw rod connected in the nut in a penetrating mode and in threaded fit with the nut, and a transmission assembly installed on the outer supporting leg, wherein the transmission assembly comprises a transmission shaft pivoted on the outer supporting leg, a first driven gear pivoted on the outer supporting leg, and a movable rod, a first transmission gear is installed at one end of the transmission shaft, a second transmission gear is installed at the other end of the transmission shaft, a second driven gear is installed on the screw rod and is arranged between the second transmission gear and the second driven gear, the second transmission gear and the second driven gear are both meshed with the first driven gear, a first matching portion is arranged on the first driven gear, a driving gear and a second matching portion matched with the first matching portion are arranged on the movable rod, the movable rod movably penetrates through the outer supporting leg and can be located at a first position close to the first driven gear and a second matching portion far away from the first driven gear The movable rod is arranged at the first position, the driving gear is separated from the first transmission gear, the first matching part is matched with the second matching part to synchronously connect the movable rod and the first driven gear, and when the movable rod is arranged at the second position, the first matching part is separated from the second matching part and the driving gear is meshed with the first transmission gear.

2. The leg as claimed in claim 1, wherein the first engagement portion is a plurality of first teeth provided on the first driven gear, and the second engagement portion is a plurality of second teeth provided on an inner end of the movable bar, the second teeth being engageable with or disengageable from the first teeth when the movable bar is laterally moved.

3. The leg as claimed in claim 2, wherein the first tooth and the second tooth are provided with guide slopes at both sides of the end portions thereof, respectively.

4. The leg as claimed in claim 1, wherein the second driven gear is a bevel gear, and the first driven gear is provided with a bevel tooth surface engaged with the bevel gear and a straight tooth surface engaged with the second transmission gear.

5. The leg of claim 1, wherein the first drive gear has a diameter greater than a diameter of the second drive gear.

6. The leg as claimed in claim 1, wherein the outer leg is pivotally connected to a pivot, the first driven gear is synchronously coupled to the pivot, and the axis of the pivot coincides with the axis of the movable lever.

7. The leg as claimed in claim 6, wherein the movable bar is provided with a socket extending outwardly from an inner end face thereof, the inner end of the pivot shaft being provided with a socket end which passes through the socket when the movable bar is in the first position.

8. The leg as claimed in claim 1, wherein the outer leg has a bushing fixed thereto, the movable rod being threaded into the bushing.

9. The leg as claimed in claim 1, wherein a locking assembly is further provided between the movable bar and the bushing, the locking assembly being adapted to lock the movable bar in the first position or the second position.

10. The leg as claimed in claim 9, wherein the detent assembly includes a ball and a spring, a radially extending mounting groove is provided on the movable bar, the spring is disposed in the mounting groove, the ball is located at an outer end of the spring, the spring is for providing a resilient force urging the ball outwardly, the inner wall of the sleeve is provided with two annular grooves, the ball is seated in one of the annular grooves when the movable bar is in the first position, and the ball is seated in the other annular groove when the movable bar is in the second position.