CN114684078A

CN114684078A - Telescopic support leg and vehicle

Info

Publication number: CN114684078A
Application number: CN202011583714.1A
Authority: CN
Inventors: 张军; 李丰华
Original assignee: Hebei Leisa Heavy Construction Machinery Co ltd
Current assignee: Hebei Leisa Heavy Construction Machinery Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2022-07-01
Anticipated expiration: 2040-12-28
Also published as: CN114684078B

Abstract

The utility model relates to a telescopic leg and a vehicle, wherein the telescopic leg comprises a locking structure, and the locking structure comprises a locking assembly, a locking plate and a resetting piece; the locking assembly comprises a mounting bracket, a lock pin and an elastic piece, wherein a lock hole is formed in the lock plate, and the lock pin movably penetrates through the mounting bracket so as to enable the lock pin to have a locking position capable of being inserted into the lock hole and an unlocking position capable of being separated from the lock hole; the lock pin and the lock plate are respectively provided with a first actuating part and a second actuating part, and when the lock pin is positioned at an unlocking position, the movable supporting leg can extend out; the reset piece can be contacted with the lock pin in the process that the movable supporting leg extends out and drives the lock pin to move from the unlocking position to the locking position, so that the first actuating part and the second actuating part are mutually contacted; in the retracting process of the movable supporting leg, the first actuating portion can be in mutual contact with the second actuating portion to drive the lock pin to move towards the direction far away from the lock hole, and the elastic piece drives the lock pin to be close to the lock hole when the lock pin is opposite to the lock hole, so that the lock pin is located at the locking position inserted in the lock hole.

Description

Telescopic support leg and vehicle

Technical Field

The disclosure relates to the technical field of vehicles, in particular to a telescopic supporting leg and a vehicle.

Background

At present, the landing leg of the engineering machinery with the landing leg, such as a crane locomotive, a heavy machinery transport vehicle and the like, is limited by a landing leg pin penetrating through a landing leg box and a movable landing leg. When the movable supporting leg is not used, the movable supporting leg is in a contracted state, and the supporting leg pin is inserted into the pin hole; when the movable support leg needs to be used, an operator pulls out the support leg pin, and the movable support leg can extend out under the control of the operator; after the operation is completed, an operator often forgets to reinsert the supporting leg pin into the pin hole after retracting the movable supporting leg, the movable supporting leg cannot be effectively limited, and the movable supporting leg can possibly appear a danger of extending out of the supporting leg box at any time, so that great potential safety hazards are caused.

Disclosure of Invention

The utility model aims at providing a flexible landing leg and vehicle, this flexible landing leg can realize spacing the automation of activity landing leg, avoids appearing the problem that the activity landing leg stretches out under the unoperated state, eliminates the potential safety hazard.

In order to achieve the above object, the present disclosure provides a telescopic leg, including a movable leg and a fixed leg sleeved outside the movable leg, wherein the movable leg is configured to be capable of extending or retracting relative to the fixed leg, the telescopic leg further includes a locking structure for locking the movable leg to the fixed leg in an unlockable manner, the locking structure includes a locking assembly, a locking plate and a reset piece, one of the movable leg and the fixed leg is provided with the locking assembly, and the other is provided with the locking plate and the reset piece;

the locking assembly comprises a mounting bracket, a locking pin and an elastic piece, wherein a locking hole for inserting the locking pin is formed in the locking plate, the locking pin is movably arranged in the mounting bracket in a penetrating way so as to enable the locking pin to have a locking position capable of being inserted into the locking hole and an unlocking position capable of being separated from the locking hole, the elastic piece is used for applying elastic force to the locking pin to enable the locking pin to move towards the direction close to the locking hole, a first actuating part is formed in the locking pin, a second actuating part capable of being in contact fit with the first actuating part is arranged on the locking plate,

the movable leg is extendable when the latch is in the unlocked position; the reset piece can be contacted with the lock pin in the process of extending the movable supporting leg and drives the lock pin to move from the unlocking position to the locking position; in the process of retracting the movable support leg, the first actuating portion and the second actuating portion are in contact with each other and drive the lock pin to move in the direction away from the lock hole, and the elastic piece drives the lock pin to move in the direction close to the lock hole when the lock pin is opposite to the lock hole, so that the lock pin is inserted into the lock hole and located at the locking position.

Optionally, the lock pin comprises a lock pin body and a rotation-causing portion, the lock pin body is axially movably and circumferentially rotatably disposed through the mounting bracket, the rotation-causing portion is located outside the mounting bracket, a protruding portion extending along a radial direction of the lock pin body is disposed on the lock pin body, a first limiting portion and a second limiting portion axially spaced from the first limiting portion along the lock pin body are formed on the mounting bracket, a plane where the first limiting portion is located and a plane where the second limiting portion is located are disposed at an angle with each other, when the lock pin is switched between the unlocking position and the locking position, the lock pin moves along an axis of the lock pin body and rotates around the axis, and the protruding portion moves between the second limiting portion and the first limiting portion,

in the locking position, the protruding part stops on the first limiting part, and the projection of the actuating part on the telescopic direction of the movable supporting leg is not overlapped with the projection of the resetting piece on the telescopic direction of the movable supporting leg; in the unlocking position, the protruding part stops on the second limiting part, and the projection of the actuating part on the telescopic direction of the movable supporting leg is at least partially overlapped with the projection of the resetting piece on the telescopic direction of the movable supporting leg.

Optionally, the second limiting portion is a limiting groove formed in the mounting bracket, a guide groove communicated with the limiting groove is further formed in the mounting bracket, the guide groove includes the first limiting portion and a guide portion extending from the first limiting portion toward the limiting groove, and the guide portion is used for guiding the protruding portion to move between the first limiting portion and the limiting groove.

Optionally, the guide groove includes a first inner wall section, a second inner wall section and a third inner wall section, the first inner wall section extends along the axial direction of the lock pin body, the second inner wall section extends from the first end of the first inner wall section toward the limiting groove, the third inner wall section extends from the second end of the first inner wall section toward the limiting groove in an inclined manner to form the guide portion, and a turning point of the first inner wall section and the third inner wall section forms the first limiting portion.

Optionally, the lock pin body and the actuating portion are formed in an L shape, the reset piece is formed in an L shape and includes a first reset section and a second reset section, in the locked position, the actuating portion is perpendicular to the first reset section and the second reset section, in the unlocked position, the actuating portion is parallel to the first reset section and perpendicular to the second reset section, and a projection of the actuating portion in the telescopic direction of the movable leg and a projection of the second reset section in the telescopic direction of the movable leg form a cross shape.

Optionally, the elastic member is sleeved on the lock pin, and one end of the elastic member is connected with the protruding part, and the other end of the elastic member is connected with the mounting bracket.

Optionally, the mounting bracket includes a bracket main body formed as a U-shaped plate including first and second brackets oppositely disposed in an axial direction of the striker body, and a third bracket formed between the first and second brackets, and a limit plate and a guide plate connected to the bracket main body, the limit plate and the guide plate being disposed between the first and second brackets and arranged angularly,

the lock pin body can axially move and circumferentially and rotatably penetrate through the first support and the second support, the limiting groove is formed in the limiting plate, and the guide groove is formed in the guide plate.

Optionally, the first actuating portion is a first wedge-shaped surface formed on a side of the lock pin close to the lock hole, and the second actuating portion is a second wedge-shaped surface formed on the lock plate, and the first wedge-shaped surface is in wedge-shaped fit with the second wedge-shaped surface during retraction of the movable leg.

Optionally, the telescopic leg further comprises a reinforcing plate, and the reinforcing plate is connected with the locking plate and the fixed leg or the reinforcing plate is connected with the locking plate and the movable leg.

The present disclosure also provides a vehicle comprising the telescopic leg.

In the technical scheme, one of the movable supporting leg and the fixed supporting leg is provided with the locking assembly, and the other one is provided with the locking plate and the resetting piece; the lock pin in the locking assembly movably penetrates through the mounting bracket and is provided with a locking position capable of being inserted into the lock hole in the lock plate and an unlocking position capable of being separated from the lock hole. When the lock pin is in the locking position inserted in the lock hole, the locking assembly is fixed relative to the lock plate, and the locking assembly and the lock plate cannot move relatively; because of these two one sets up in fixed landing leg, the other one sets up in the activity landing leg, also the activity landing leg can not take place the motion for this fixed landing leg promptly to realize the locking to this activity landing leg. When the lock pin is located at the unlocking position separated from the lock hole, the locking assembly can move relative to the lock plate, namely the movable supporting leg can move relative to the fixed supporting leg, so that the locking of the locking structure on the movable supporting leg is released.

When an operator needs to use the movable support leg, the lock pin is manually switched from the locking position to the unlocking position, and then the movable support leg is controlled to extend out; in the process that the movable supporting leg extends, the reset piece can be in contact with the lock pin and drives the lock pin to move from the unlocking position to the locking position, the lock pin is not inserted into the lock hole in the locking position, and the first actuating part on the lock pin can be in mutual contact with the second actuating part in the process that the movable supporting leg retracts. After the movable support leg is used, an operator controls the movable support leg to retract, in the retracting process of the movable support leg, the first actuating portion can be in contact with the second actuating portion to drive the lock pin to move towards the direction away from the lock hole until the lock pin is opposite to the lock hole, when the lock pin is opposite to the lock hole, the elastic piece drives the lock pin to move towards the direction close to the lock hole, so that the lock pin is located at the locking position inserted in the lock hole, automatic limiting locking of the movable support leg is achieved, the situation that the movable support leg is not limited and locked due to the fact that the operator forgets to insert the lock pin into the lock hole is avoided, the problem that the movable support leg extends out in the non-operation state is avoided, and potential safety hazards are eliminated.

In short, by the extending action of the movable supporting leg, the reset piece can be contacted with the lock pin and automatically drives the lock pin to move from the unlocking position to the locking position, so that the lock pin needs to move from the unlocking position to the locking position, because the lock pin cannot be automatically inserted into the lock hole to realize automatic locking in the retracting process of the movable supporting leg under the unlocking position state; after the lock pin is driven to the locking position from the unlocking position, in the retraction process of the movable support leg, the first actuating portion on the lock pin can be in mutual contact with the second actuating portion on the lock plate and drives the lock pin to move towards the direction far away from the lock hole until the lock pin is opposite to the lock hole on the lock plate, the lock pin can move towards the direction close to the lock hole under the action of the elastic piece until the lock pin is inserted into the lock hole, and automatic limiting locking of the movable support leg is achieved.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure, but do not constitute a limitation of the disclosure. In the drawings:

FIG. 1 is a schematic structural view of an embodiment of a telescoping leg of the present disclosure, wherein a fixed leg, a movable leg, and a latch structure are illustrated;

FIG. 2 is an exploded view of the locking structure of the telescoping leg according to one embodiment of the present disclosure;

FIG. 3 is a structural schematic diagram of a locking pin of the locking structure of the telescopic leg according to an embodiment of the disclosure in a locking position, and the locking pin is inserted into a locking hole;

FIG. 4 is a schematic view of the locking pin of the locking structure of the telescopic leg of one embodiment of the present disclosure in an unlocked position;

FIG. 5 is a schematic structural view illustrating a locking pin of the locking structure of the telescopic leg of the embodiment of the present disclosure in a process of being changed from an unlocking position to a locking position;

FIG. 6 is a schematic structural view of a locking pin of the locking structure of the telescopic leg according to an embodiment of the present disclosure in a locking position, wherein the locking pin is not inserted into the locking hole;

fig. 7 is a schematic structural view illustrating a first actuating portion of a lock pin of a locking structure of a telescopic leg according to an embodiment of the present disclosure cooperating with a second actuating portion of a lock plate.

Description of the reference numerals

1 locking subassembly 11 installing support

110 guide groove 1101 first inner wall segment

1102 second inner wall section 1103 third inner wall section

1104 second open end 111 first position-limiting part

112 second position-limiting portion 1121 at the first open end

114 bracket body 1141 first bracket

1142 second bracket 1143 third bracket

115 limiting plate 116 deflector

12-pin 120 first actuator

121 lug 122 detent body

123 actuating part 124 convex block

1241 first stop face 1242 second stop face

13 elastic piece 2 locking plate

21 locking hole 22 second actuator

3 first reset segment of reset piece 31

32 second reset segment 4 reinforcing plate

10 fixed leg and 20 movable leg

100 locking structure

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, where the contrary is not stated, directional words such as "inner and outer" are used to refer to the inner and outer of the particular structural profile; terms such as "first, second, and third" are used merely to distinguish one element from another, and are not sequential or significant.

As shown in fig. 1 to 7, the present disclosure provides a telescopic leg, including movable leg 20 and fixed leg 10 that the cover was established outside movable leg 20, movable leg 20 sets up to be able to stretch out or retract for fixed leg 10, telescopic leg still includes and is used for locking movable leg 20 in fixed leg 10's locking structure 100 with unblock ground, locking structure 100 includes locking subassembly 1, jam plate 2 and piece 3 that resets, installs locking subassembly 1 on one of movable leg 20 and fixed leg 10, installs jam plate 2 and piece 3 that resets on the other.

The locking assembly 1 comprises a mounting bracket 11, a lock pin 12 and an elastic piece 13, wherein a lock hole 21 for inserting the lock pin 12 is formed on the lock plate 2, the lock pin 12 movably penetrates through the mounting bracket 11 so that the lock pin 12 has a locking position capable of being inserted into the lock hole 21 and an unlocking position capable of being separated from the lock hole 21, the elastic piece 13 is used for applying elastic force to the lock pin 12 to enable the lock pin 12 to move towards a direction close to the lock hole 21, a first actuating part 120 is formed on the lock pin 12, and a second actuating part 22 capable of being in contact fit with the first actuating part 120 is arranged on the lock plate 2.

When the lock pin 12 is in the unlocked position, the movable leg 20 can be extended; the reset member 3 can contact the lock pin 12 during the extension of the movable leg 20 and drive the lock pin 12 to move from the unlocked position to the locked position, so that the first actuating portion 120 and the second actuating portion 22 can contact each other during the retraction of the movable leg 20.

During the retraction of the movable leg 20, the first actuating portion 120 and the second actuating portion 22 can contact each other to drive the lock pin 12 to move away from the lock hole 21, and the elastic member 13 drives the lock pin 12 to move close to the lock hole 21 when the lock pin 12 is opposite to the lock hole 21, so that the lock pin 12 is located at the locking position inserted in the lock hole 21.

It should be noted that the lock position of the lock pin 12 merely indicates the position state of the lock pin 12, and does not imply that the lock pin 12 is always inserted into the lock hole 21 in the lock position state, but may also indicate that the lock pin 12 is not inserted into the lock hole 21.

In the above technical solution, by installing the locking assembly 1 on one of the movable leg 20 and the fixed leg 10, and installing the locking plate 2 and the reset piece 3 on the other; the lock pin 12 in the lock assembly 1 is movably disposed through the mounting bracket 11 and has a locked position capable of being inserted into the lock hole 21 of the lock plate 2 and an unlocked position capable of being disengaged from the lock hole 21. When the lock pin 12 is in the locking position inserted in the lock hole 21, the locking assembly 1 is in a fixed position relative to the lock plate 2, and the two cannot move relatively; one of the two is arranged on the fixed leg 10, and the other is arranged on the movable leg 20, that is, the movable leg 20 cannot move relative to the fixed leg 10, so that the movable leg 20 is locked. When the lock pin 12 is in the unlocking position out of the lock hole 21, the locking assembly 1 can move relative to the lock plate 2, that is, the movable leg 20 can move relative to the fixed leg 10, so that the locking structure 100 releases the locking of the movable leg 20.

When an operator needs to use the movable support leg 20, the lock pin 12 is manually switched from the locking position to the unlocking position, and the movable support leg 20 is controlled to extend out; during the extension of the movable leg 20, the reset element 3 can contact the lock pin 12 and drive the lock pin 12 to move from the unlocking position to the locking position, at which the lock pin 12 is not inserted into the lock hole 21, and the first actuating portion 120 on the lock pin 12 can contact the second actuating portion 22 during the retraction of the movable leg 20. After the movable support leg 20 is used, an operator controls the movable support leg 20 to retract, in the retracting process of the movable support leg 20, the first actuating portion 120 can be in contact with the second actuating portion 22 to drive the lock pin 12 to move in the direction away from the lock hole 21 until the lock pin 12 is opposite to the lock hole 21, when the lock pin 12 is opposite to the lock hole 21, the elastic piece 13 drives the lock pin 12 to move in the direction close to the lock hole 21, so that the lock pin 12 is located at the locking position inserted in the lock hole 21, automatic limiting locking of the movable support leg 20 is achieved, the problem that the movable support leg 20 extends out when the operator forgets to insert the lock pin 12 into the lock hole 21 and does not perform limiting locking on the movable support leg 20 is avoided, and potential safety hazards are eliminated.

In short, by the extending action of the movable leg 20, the reset member 3 can contact the lock pin 12 and automatically drive the lock pin 12 to move from the unlocking position to the locking position, so that the lock pin 12 is moved from the unlocking position to the locking position because the lock pin 12 cannot be automatically inserted into the lock hole 21 to achieve automatic locking in the process of retracting the movable leg 20 in the state of the unlocking position of the lock pin 12; after the lock pin 12 is driven from the unlocking position to the locking position, in the process of retracting the movable leg 20, the first actuating portion 120 on the lock pin 12 can be in contact with the second actuating portion 22 on the lock plate 2, and the lock pin 12 is driven to move in the direction away from the lock hole 21 until the lock pin 12 is opposite to the lock hole 21 on the lock plate 2, and the lock pin 12 can move in the direction close to the lock hole 21 under the action of the elastic member 13 until the lock pin 12 is inserted into the lock hole 21, so that automatic limiting and locking of the movable leg 20 are realized.

In one embodiment, referring to fig. 1 and 2, the lock pin 12 includes a lock pin body 122 and a rotation-inducing portion 123 connected to each other, the lock pin body 122 is axially movably and circumferentially rotatably disposed through the mounting bracket 11, and the rotation-inducing portion 123 is located outside the mounting bracket 11. The lock pin body 122 is provided with a bulge 121 extending along the radial direction of the lock pin body, the mounting bracket 11 is provided with a first limiting part 111 and a second limiting part 112 arranged along the axial direction of the lock pin body 122 at intervals with the first limiting part 111, the plane where the first limiting part 111 is located and the plane where the second limiting part 112 is located are arranged at an angle with each other, when the lock pin 12 is switched between an unlocking position and a locking position, the lock pin 12 moves along the axis of the lock pin body 122 and rotates around the axis, the bulge 121 moves between the second limiting part 112 and the first limiting part 111, at the locking position, the bulge 121 is stopped on the first limiting part 111, and the projection of the rotation part 123 in the telescopic direction of the movable leg 20 does not coincide with the projection of the reset piece 3 in the telescopic direction of the movable leg 20; in the unlocking position, the protrusion 121 is stopped on the second limit portion 112, and the projection of the rotation-causing portion 123 in the telescopic direction of the movable leg 20 at least partially coincides with the projection of the reset piece 3 in the telescopic direction of the movable leg 20, so that the reset piece 3 can contact the rotation-causing portion 123 during the extension of the movable leg 20 to drive the lock pin 12 to rotate.

In this embodiment, first, the lock pin 12 includes a lock pin body 122, and the lock pin body 122 is used for being connected with the mounting bracket 11, so as to ensure the stability of installation on the premise of ensuring the axial movement and circumferential rotation of the lock pin body.

Secondly, the lock pin 12 is provided with a bulge 121 extending along the radial direction of the lock pin, the mounting bracket 11 is provided with a first limiting part 111 and a second limiting part 112 arranged at an interval with the first limiting part 111 along the axial direction of the lock pin body 122, when the lock pin 12 is at the unlocking position, the bulge 121 is positioned at the second limiting part 112, and the second limiting part 112 limits the bulge 121; when the lock pin 12 is in the locking position, the protrusion 121 is located at the first limiting part 111, the second limiting part 111 limits the protrusion 121, when the lock pin 12 is switched between the unlocking position and the locking position, the lock pin 12 moves along the axis of the lock pin body 122 and rotates around the axis, and the protrusion 121 moves between the second limiting part 112 and the first limiting part 111, that is, by providing the protrusion 121, the first limiting part 111, and the second limiting part 112, it can be ensured that the lock pin 12 maintains a relatively stable state at the unlocking position and the locking position, and under the condition of not being affected by external force, axial movement along the lock pin body 122 or rotation relative to the axis at the unlocking position and the locking position will not occur. In order to ensure that the protrusion 121 can move between the first position-limiting portion 111 and the second position-limiting portion 112 spaced apart from the first position-limiting portion 111 in the axial direction of the lock pin body 122, the plane of the first position-limiting portion 111 and the plane of the second position-limiting portion 112 are disposed at an angle to each other, so that the protrusion 121 rotates with the lock pin 12 without structural interference.

In addition, the lock pin 12 further includes a rotation-causing portion 123 connected to the lock pin body 122, the rotation-causing portion 123 is located outside the mounting bracket 11, the reset element 3 can contact with the rotation-causing portion 123 and drive the lock pin 12 to rotate, so that the protrusion 121 located at the unlocking position and stopped at the second stopping portion 112 moves to and stops with the first stopping portion 111, that is, the lock pin is switched to the locking position.

Specifically, when the lock pin 12 is in the locking position, the protrusion 121 is stopped on the first limit part 111, so that the projection of the rotating part 123 in the telescopic direction of the movable leg 20 is not coincident with the projection of the reset piece 3 in the telescopic direction of the movable leg 20; that is, when the lock pin 12 is in the lock position, the reset member 3 cannot contact the rotation inducing portion 123, that is, cannot drive the lock pin 12 to rotate, the reset member 3 cannot change the state of the lock pin 12, and the lock pin 12 maintains the current lock position. When the lock pin 12 is in the unlocking position, the protrusion 121 stops on the second limit part 112, so that the projection of the rotating part 123 in the telescopic direction of the movable leg 20 at least partially coincides with the projection of the reset piece 3 in the telescopic direction of the movable leg 20; that is, when the lock pin 12 is in the unlocking position, in the process of extending the movable leg 20, the reset member 3 can contact with the rotation-causing portion 123 and drive the lock pin 12 to rotate, so as to release the stopping effect of the second limiting portion 112 on the protrusion 121, after the stopping effect is released, the lock pin 12 can move along the axial direction of the lock pin body 122 under the effect of the elastic member 13 until the protrusion 121 stops with the first limiting portion 111, so that the lock pin 12 is switched from the unlocking position to the locking position under the effect of the reset member 3, and by the extending action of the movable leg 20, the reset member 3 can contact with the rotation-causing portion 123 and drive the lock pin 12 to rotate, and the lock pin 12 is switched from the unlocking position to the locking position under the effect of the elastic force of the elastic member 13.

Alternatively, referring to fig. 2, the second position-limiting portion 112 is a position-limiting groove formed on the mounting bracket 11, a guide groove 110 communicated with the position-limiting groove is further formed on the mounting bracket 11, and the guide groove 110 includes a first position-limiting portion 111 and a guide portion extending from the first position-limiting portion 111 toward the position-limiting groove, and the guide portion is used for guiding the protrusion portion 121 to move between the first position-limiting portion 111 and the position-limiting groove.

In this embodiment, the second position-limiting portion 112 is configured as a position-limiting groove, when the lock pin 12 is in the unlocking position, the protrusion 121 provided on the lock pin body 122 is inserted into the position-limiting groove, the position-limiting groove can play a position-limiting role, the lock pin 12 is limited from moving along the axial direction of the lock pin body 122, while in the process of extending the movable leg 20, the reset piece 3 can contact with the rotation-causing portion 123 and drive the lock pin 12 to rotate, the protrusion 121 rotates with the lock pin 12 and then disengages from the position-limiting groove, when the protrusion 121 disengages from the position-limiting groove, the protrusion is inserted into the guide groove 110 communicated with the position-limiting groove, and the lock pin 12 can move toward the direction close to the lock hole 21 under the effect of the elastic piece 13, during the movement, the guide portion of the guide groove 110 can guide the protrusion 121 to move from the position-limiting groove to the first position-limiting portion 111, and the lock pin 12 can be ensured to be switched to the locking position by providing the guide portion to guide the protrusion 121, in addition, the guide part can also ensure the stability of the lock pin 12 moving towards the direction close to the lock hole 21 under the action of the elastic piece 13, and avoid shaking in the moving process.

The above mentioned is the process that the protrusion 121 can be switched from the state of being stopped by the second stopper portion 112 to the state of being stopped by the first stopper portion 111 under the action of the reset member 3 during the process that the movable leg 20 is extended, that is, the process that the lock pin 12 is switched from the unlock position to the lock position under the action of the reset member 3. While the process of switching the lock pin 12 from the locked position to the unlocked position is described below:

when the lock pin 12 needs to be pulled out of the lock hole 21 and switched to the locking position, an operator operates the lock pin 12 and applies a force in a direction away from the lock hole 21 to overcome the action of the elastic force of the elastic member 13, so that the lock pin 12 moves in the direction away from the lock hole 21, in the moving process, the protrusion 121 arranged on the lock pin body 122 gradually leaves away from the first limiting portion 111 stopping the protrusion, and when the protrusion 121 directly faces the limiting groove position, the operator rotates the lock pin 12 to insert the protrusion 121 into the limiting groove, so that the lock pin 12 is limited in the axial direction of the lock pin body 122, that is, the lock pin 12 is switched to the unlocking position.

Alternatively, referring to fig. 2, the limiting groove may extend along the radial direction of the lock pin body 122 and one end of the limiting groove is open, and the open end is a first open end 1121; the guide groove 110 extends along the axial direction of the lock pin body 122, one end of the guide groove 110, which is far away from the lock hole 21, is open, the open end is a second open end 1104, the second open end 1104 is opposite to and communicated with the first open end 1121 so as to allow the protrusion 121 to move between the limiting groove and the guide groove 110, in addition, a plane where the guide groove 110 is located and a plane where the limiting groove is located are arranged at an angle, so that the protrusion 121 can be rotatably inserted into the limiting groove from a state of being inserted into the guide groove 110 or rotatably inserted into the guide groove 110 from a state of being inserted into the limiting groove under the condition that the protrusion is rotated.

The present disclosure does not limit the specific shape of the limiting groove, and the limiting groove can communicate with the guide groove 110 and can limit the movement of the lock pin 12 in the axial direction of the lock pin body 122; in addition, the guide groove 110 may be configured in any suitable shape, which is not limited by the present disclosure.

In one embodiment, referring to fig. 2, the guide groove 110 includes a first inner wall section 1101, a second inner wall section 1102 and a third inner wall section 1103, the first inner wall section 1101 extends along the axial direction of the lock pin body 122, the second inner wall section 1102 extends from a first end of the first inner wall section 1101 toward the stopper groove, the third inner wall section 1103 extends from a second end of the first inner wall section 1101 toward the stopper groove to form a guide portion, and a bent portion of the first inner wall section 1101 and the third inner wall section 1103 constitutes the first stopper portion 111.

First, the first inner wall section 1101 extends along the axial direction of the lock pin body 122, and during the process of switching the lock pin 12 from the locking position to the unlocking position by an operator, the lock pin 12 moves along the axial direction of the lock pin body 122 and away from the lock hole 21, during the moving process, the protrusion 121 is inserted into the guide groove 110 and can contact with the first inner wall section 1101, that is, the first inner wall section 1101 can guide the axial movement of the lock pin 12 along the lock pin body 122, and the stability of the axial movement of the lock pin 12 along the lock pin body 122 is ensured.

Next, the second inner wall section 1102 extends from the first end of the first inner wall section 1101 toward the limiting groove, it should be noted that the first end of the first inner wall section 1101 is an end away from the lock hole 21, when the lock pin 12 moves along the axial direction of the lock pin body 122 until the protrusion 121 abuts against the second inner wall section 1102, an operator can rotate the lock pin 12 to make the protrusion 121 enter the limiting groove, and during this rotation, the protrusion 121 can abut against the second inner wall section 1102, and the stability of the lock pin 12 during the rotation is ensured by the guidance of the second inner wall section 1102, for example, the second inner wall section 1102 can extend along the radial direction of the lock pin body 122, but the extending direction of the second inner wall section 1102 is not limited by the present disclosure.

In addition, it should be noted that the second end of the first inner-wall section 1101 is an end of the first inner-wall section 1101 close to the lock hole 21. The third inner wall section 1103 extends obliquely from the second end toward the stopper groove to form the above-mentioned guide portion, and a first stopper portion 111 is formed at a bent portion between the first inner wall section 1101 and the third inner wall section 1103. After the protrusion 121 is disengaged from the retaining groove, the protrusion 121 follows the lock pin body 122 along the axis thereof to move toward the locking hole 21, and during this movement, the third inner wall segment 1103 extending obliquely can contact the protrusion 121 and guide the protrusion 121 toward the first retaining portion 111 formed by the inflection of the first inner wall segment 1101. In other words, when the reset element 3 contacts the rotation-causing portion 123 and drives the lock pin 12 to rotate, the protrusion 121 is disengaged from the limiting groove, and then the lock position can be automatically switched to the locking position under the elastic force of the elastic element 13 and the guiding action of the third inner wall section 1103, so that the manual operation is not needed, and the degree of automation is high.

Of course, the present disclosure is not limited to a specific type of the guide portion, and the guide portion may be configured as an inclined guide rail (not shown) provided on the mounting bracket 11.

Referring to fig. 1 and 2, the lock pin body 122 and the rotation inducing portion 123 are formed in an L-shape, and the restoring member 3 is formed in an L-shape and includes a first restoring section 31 and a second restoring section 32. In the locked position, the rotation-inducing portion 123 is perpendicular to the first reset segment 31 and the second reset segment 32, in the unlocked position, the rotation-inducing portion 123 is parallel to the first reset segment 31 and perpendicular to the second reset segment 32, and the projection of the rotation-inducing portion 123 in the telescopic direction of the movable leg 20 and the projection of the second reset segment 32 in the telescopic direction of the movable leg 20 form a cross shape.

In this embodiment, when the lock pin 12 is in the locking position, the projection of the rotation-causing part 123 in the telescopic direction of the movable leg 20 is not overlapped with the projection of the reset piece 3 in the telescopic direction of the movable leg 20, and the rotation-causing part 123 is perpendicular to the first reset segment 31 and the second reset segment 32, even if the movable leg 20 is extended or retracted, the reset piece 3 cannot contact the rotation-causing part 123 and drive the lock pin 12 to rotate. When the lock pin 12 is in the unlocking position, the rotation-causing part 123 is parallel to the first reset section 31 and perpendicular to the second reset section 32, and the projection of the rotation-causing part 123 in the telescopic direction of the movable leg 20 and the projection of the second reset section 32 in the telescopic direction of the movable leg 20 form a cross shape, and in the retracting process of the movable leg 20, the second reset section 32 of the reset piece 3 can contact the rotation-causing part 123 and drive the rotation-causing part 123 to rotate around the axis of the lock pin body 122 so as to drive the protrusion 121 to disengage from the limiting groove, so that the lock pin 12 is switched from the unlocking position to the locking position. By designing the lock pin 12 and the reset piece 3 to be L-shaped structures, the reset piece 3 and the rotation-causing part 123 have different position corresponding relations when the lock pin 12 is in two different position states, namely an unlocking position and a locking position, so that the reset piece 3 can be in contact fit with the rotation-causing part 123 when the lock pin 12 is in the unlocking position; when the lock pin 12 is in the locking position, the reset piece 3 cannot be in contact fit with the rotation-causing part 123, and the structure is simple and the manufacturing and processing are convenient.

In one embodiment, the reset device 3 and the locking plate 2 are mounted on the movable leg 20, the locking assembly 1 is mounted on the fixed leg 10, the first reset segment 31 is connected to the movable leg 20, and the second reset segment 32 is connected to an end of the first reset segment 31 away from the movable leg 20.

In another embodiment, the reset device 3 and the locking plate 2 are mounted on the fixed leg 10, the locking assembly 1 is mounted on the movable leg 20, the first reset segment 31 is connected to the fixed leg 10, and the second reset segment 32 is connected to an end of the first reset segment 31 away from the fixed leg 10.

Alternatively, referring to fig. 2, the elastic member 13 is fitted over the locking pin 12, and one end of the elastic member 13 is connected to the protrusion 121 and the other end is connected to the mounting bracket 11. When the lock pin 12 moves in the axial direction of the lock pin body 122 and in the direction away from the lock hole 21, the elastic member 13 is elastically deformed to apply an elastic force to the lock pin 12 in the axial direction of the lock pin body 122 and in the direction close to the lock hole 21. After the protrusion 121 is disengaged from the limiting groove, the elastic member 13 may cooperate with the guide portion to switch the lock pin 12 to the locking position. The elastic member 13 may be configured as any suitable elastic structure, for example, the elastic member 13 may be configured as an elastic rubber block, a coil spring, or the like, which is not limited by the present disclosure.

In one embodiment, referring to fig. 2, the mounting bracket 11 includes a bracket main body 114, and a limit plate 115 and a guide plate 116 connected to the bracket main body 114, the bracket main body 114 is formed as a U-shaped plate including a first bracket 1141 and a second bracket 1142 oppositely disposed in an axial direction of the lock pin body 122, and a third bracket 1143 formed between the first bracket 1141 and the second bracket 1142, the limit plate 115 and the guide plate 116 are disposed between the first bracket 1141 and the second bracket 1142 and angularly disposed, the lock pin body 122 is axially movably and circumferentially rotatably inserted through the first bracket 1141 and the second bracket 1142, a limit groove is formed on the limit plate 114115, and the guide groove 110 is formed on the guide plate 116.

In this embodiment, the bracket main body 114 is formed as a U-shaped plate including a first bracket 1141 and a second bracket 1142 oppositely disposed in the axial direction of the lock pin body 122 and a third bracket 1143 formed between the first bracket 1141 and the second bracket 1142, the lock pin body 122 is axially movably and circumferentially rotatably inserted through the first bracket 1141 and the second bracket 1142, and the lock pin body 122 is installed on the premise of ensuring the movement and rotation of the lock pin body 122.

When the locking assembly 1 is mounted to the movable leg 20, the third bracket 1143 may be connected to the movable leg 20, thereby mounting the bracket body 114 to the movable leg 20; for example, the third bracket 1143 may be fixed on the movable leg 20 by welding or bolting, so as to ensure the stability of the installation. However, the present disclosure is not limited to the connection manner of the third bracket 1143 to the movable leg 20, and the third bracket may be attached to the movable leg 20 by bonding or clipping.

When the locking assembly 1 is mounted to the fixed leg 10, the third bracket 1143 may be connected to the fixed leg 10, thereby mounting the bracket main body 114 to the fixed leg 10; for example, the third bracket 1143 may be fixed to the fixed leg 10 by welding or bolting, so as to ensure the stability of the installation. However, the present disclosure is not limited to the connection mode of the third bracket 1143 to the fixed leg 10, and the third bracket may be mounted to the fixed leg 10 by bonding or clipping.

Alternatively, the first bracket 1141 is closer to the locking hole 21 of the locking plate 2 than the second bracket 1142, and the rotation inducing portion 123 connected to the locking pin body 122 is disposed outside the second bracket 1142.

In addition, in combination with the elastic member 13, the elastic member 13 may be configured as a coil spring and sleeved on the lock pin body 122, one end of the coil spring abuts against the protrusion 121, and the other end of the coil spring abuts against the inner side surface of the second bracket 1142, and during the movement of the lock pin 12 along the axial direction of the lock pin body 122 and away from the lock hole 21, the coil spring is compressed and applies an elastic force to the lock pin 12 through the protrusion 121 to move the lock pin towards the lock hole 21. Alternatively, one end of the coil spring abuts against the projection 121 and the other end abuts against the inner side surface of the first bracket 1141, and in the process of moving the lock pin 12 in the axial direction of the lock pin body 122 and in the direction away from the lock hole 21, the coil spring is stretched and applies an elastic force to the lock pin 12 by the projection 121 so as to move toward the lock hole 21.

The present disclosure is not limited to a particular configuration of the bracket body 114 and may be configured in any suitable shape and configuration while ensuring a stable mounting.

Illustratively, the guide plate 116 is disposed at the opening of the bracket main body 114 configured as a U-shaped plate and extends along the axial direction of the lock pin body 122, the limit plate 115 is disposed at the side end of the opening of the U-shaped plate and extends along the axial direction of the lock pin body 122, that is, the plane of the limit plate 115 is disposed at an angle to the plane of the guide plate 116, the limit groove is disposed on the limit plate 115, and the guide groove 110 is disposed on the guide plate 116.

Of course, the mounting bracket 11 may be constructed as an integrally formed structure, reducing the number of mounting components.

Referring to fig. 2, the first actuating portion 120 is a first wedge surface formed on the side of the lock pin 12 adjacent the lock hole 21, and the second actuating portion 22 is a second wedge surface formed on the lock plate 2, the first wedge surface and the second wedge surface being in wedge engagement during retraction of the movable leg 20.

During the retraction of the movable leg 20, the first wedge surface and the second wedge surface form a sliding fit, and the lock pin 12 can be driven to move towards a direction away from the lock hole 21 until the lock pin 12 and the lock hole 21 are opposite; under the condition that the lock pin 12 is opposite to the lock hole, the elastic element 13 drives the lock pin 12 to move towards the direction close to the lock hole 21, so that the lock pin 12 is inserted into the lock hole 21, and the movable support leg 20 is automatically locked.

Specifically, a protruding block 124 is disposed at one end of the lock pin body 122 close to the lock hole 21, the first wedge surface is disposed on the protruding block 124, in addition, a first stop surface 1241 is disposed on the protruding block 124 along a radial extension of the lock pin body 122, and a second stop surface 1242 is disposed along an axial extension of the lock pin body 122, the first stop surface 1241 is used for abutting against an outer side surface of the first bracket 1141 to prevent the lock pin body 122 from being detached from the bracket main body 114; the second stop face 1242 is adapted to abut against the bore wall of the lock bore 21.

Correspondingly, the locking plate 2 can be provided with a through-going locking hole 21, which locking hole 21 can be configured as a square hole, the above-mentioned second stop face 1242 being intended to abut against the wall of the square hole. In addition, the insertion end of the locking hole 21 is adjacent to the side of the second wedge surface adjacent to the locking pin 12 to facilitate insertion of the boss 124 into the square hole.

In order to improve the stability of the installation of the locking plate 2, the locking structure 100 may further include a reinforcing plate 4, and the reinforcing plate 4 may connect the locking plate 2 and the movable leg 20, or connect the locking plate 2 and the fixed leg 10, which is not limited in this disclosure.

Exemplarily, this reinforcing plate 4 connects jam plate 2 and activity landing leg 20, and this reinforcing plate 4 constructs for right triangle shaped plate, and a right-angle side of this right triangle shaped plate is connected with jam plate 2, and another right-angle side is connected with activity landing leg 20, and then realizes the firm support to this jam plate 2, improves the stability of this jam plate 2 installation.

Referring to fig. 1, in one embodiment, the latch assembly 1 of the latch structure 100 is disposed on an outer sidewall of the fixed leg 10, and the arrangement direction of the locking pin 12 is perpendicular to the extension and contraction direction of the movable leg 20. The reset piece 3 and the locking plate 2 are disposed on the movable leg 20, and the reset piece 3 and the locking plate 2 are disposed opposite to each other in a direction perpendicular to the extending and retracting direction of the movable leg 20.

The operation of the telescopic leg will be described in detail with reference to the above telescopic leg and with reference to the state of the locking structure 100 of fig. 3 to 7 at each position:

it should be noted that, in order to clearly illustrate the respective positions, the movable leg 20 and the fixed leg 10 are omitted in fig. 3 to 7.

First, referring to fig. 3, in this view, the lock pin 12 is in a lock position inserted in the lock hole 21. And it can be seen that the reset element 3 is located to the left of the latch 12, i.e., inward in the direction of extension.

Referring next to FIG. 4, in this view, the lock pin 12 is in the unlocked position. When the operator needs to use the movable leg 20, the operator pulls out the lock pin 12 from the lock hole 21 and rotates to an unlocking position, in which the protrusion 121 is inserted into the limiting groove and the rotating part 123 at least partially overlaps and does not contact with the projection of the reset piece 3 in the telescopic direction of the movable leg 20.

Referring again to fig. 5, in this view, the movable leg 20 (not shown) is extended outward by a certain distance compared to fig. 4, and the reset element 3 contacts the rotation-causing portion 123 and drives the lock pin 12 to rotate along with the extension of the movable leg 20, so that the protrusion 121 is disengaged from the limiting groove.

Then, referring to fig. 6, in this view, the movable leg 20 is extended outward with respect to fig. 5, and after the reset member 3 drives the lock pin 12 to rotate to disengage the protrusion 121 from the limiting groove, the lock pin 12 is switched to the locking position where it is not inserted into the lock hole 21. The reset member 3 and the lock plate 2 are both located on the right side of the locking assembly 1, i.e., outside in the direction of extension.

Fig. 3 to 6 show schematic diagrams of the locking structure 100 in various position states during the process of locking the movable leg 20 from the position to the extension.

While fig. 7 shows the process of the first actuating portion 120 of the lock pin 12 and the second actuating portion 22 of the lock plate 2 cooperating with each other during the inward retraction of the movable leg 20 from the state of fig. 6, after further retraction, the locking structure 100 in fig. 7 will become the position of the locking structure 100 in fig. 1, and automatic locking of the movable leg 20 is realized.

The present disclosure also provides a vehicle including the above-mentioned telescopic leg.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure as long as it does not depart from the gist of the present disclosure.

Claims

1. The telescopic leg is characterized by comprising a movable leg (20) and a fixed leg (10) sleeved outside the movable leg (20), wherein the movable leg (20) is arranged to be capable of extending or retracting relative to the fixed leg (10), the telescopic leg further comprises a locking structure (100) used for locking the movable leg (20) on the fixed leg (10) in an unlocking manner, the locking structure (100) comprises a locking assembly (1), a locking plate (2) and a resetting piece (3), one of the movable leg (20) and the fixed leg (10) is provided with the locking assembly (1), and the other one of the movable leg (20) and the fixed leg (10) is provided with the locking plate (2) and the resetting piece (3);

the locking assembly (1) comprises a mounting bracket (11), a lock pin (12) and an elastic piece (13), a lock hole (21) for inserting the lock pin (12) is formed on the locking plate (2), the lock pin (12) is movably arranged in the mounting bracket (11) in a penetrating way, so that the lock pin (12) has a locking position capable of being inserted into the lock hole (21) and an unlocking position capable of being separated from the lock hole (21), the elastic piece (13) is used for applying elastic force to the lock pin (12) to enable the lock pin to move towards the direction close to the lock hole (21), a first actuating part (120) is formed on the lock pin (12), and a second actuating part (22) capable of being in contact fit with the first actuating part (120) is arranged on the locking plate (2),

the movable leg (20) being extendable when the latch (12) is in the unlocked position; the reset piece (3) can be contacted with the lock pin (12) in the process of extending the movable support leg (20) and drives the lock pin (12) to move from the unlocking position to the locking position; during the retraction process of the movable leg (20), the first actuating part (120) and the second actuating part (22) are in mutual contact and drive the lock pin (12) to move towards the direction away from the lock hole (21), and the elastic part (13) drives the lock pin (12) to move towards the direction close to the lock hole (21) when the lock pin (12) is opposite to the lock hole (21), so that the lock pin (12) is inserted into the lock hole (21) and located at the locking position.

2. The telescopic leg as claimed in claim 1, wherein the lock pin (12) includes a lock pin body (122) and a rotation-causing portion (123) connected to each other, the lock pin body (122) is axially movably and circumferentially rotatably disposed through the mounting bracket (11), the rotation-causing portion (123) is located outside the mounting bracket (11), a protruding portion (121) extending along a radial direction of the lock pin body is disposed on the lock pin body (122), a first limiting portion (111) and a second limiting portion (112) spaced from the first limiting portion (111) along an axial direction of the lock pin body (122) are formed on the mounting bracket (11), a plane on which the first limiting portion (111) is located and a plane on which the second limiting portion (112) is located are disposed at an angle to each other, and when the lock pin (12) is switched between the unlocking position and the locking position, the lock pin (12) moves along the axis of the lock pin body (122) and rotates around the axis, the bulge (121) moves between the second limit part (112) and the first limit part (111),

in the locking position, the protrusion part (121) is stopped on the first limiting part (111), and the projection of the actuating part (123) in the telescopic direction of the movable leg (20) is not coincident with the projection of the resetting piece (3) in the telescopic direction of the movable leg (20); in the unlocking position, the protrusion part (121) is stopped on the second limiting part (112), and the projection of the actuating part (123) on the telescopic direction of the movable leg (20) is at least partially overlapped with the projection of the reset piece (3) on the telescopic direction of the movable leg (20).

3. The telescopic leg according to claim 2, wherein the second limiting portion (112) is a limiting groove formed on the mounting bracket (11), a guide groove (110) communicating with the limiting groove is further formed on the mounting bracket (11), the guide groove (110) comprises the first limiting portion (111) and a guide portion extending from the first limiting portion (111) toward the limiting groove, and the guide portion is used for guiding the projection (121) to move between the first limiting portion (111) and the limiting groove.

4. The telescopic leg according to claim 3, wherein the guide groove (110) comprises a first inner wall section (1101), a second inner wall section (1102) and a third inner wall section (1103), the first inner wall section (1101) extends along the axial direction of the lock pin body (122), the second inner wall section (1102) extends from a first end of the first inner wall section (1101) toward the stopper groove, the third inner wall section (1103) extends from a second end of the first inner wall section (1101) toward the stopper groove obliquely to form the guide portion, and a junction of the first inner wall section (1101) and the third inner wall section (1103) constitutes the first stopper portion (111).

5. The telescopic leg according to claim 2, wherein the lock pin body (122) and the actuating portion (123) are formed in an L-shape, the return member (3) is formed in an L-shape and comprises a first return section (31) and a second return section (32), in the locked position the actuating portion (123) is mutually perpendicular to the first return section (31) and the second return section (32), in the unlocked position the actuating portion (123) is mutually parallel to the first return section (31) and mutually perpendicular to the second return section (32), and a projection of the actuating portion (123) in the telescopic direction of the movable leg (20) and a projection of the second return section (32) in the telescopic direction of the movable leg (20) form a "ten" shape.

6. Telescopic leg according to claim 2, wherein said elastic element (13) is fitted over said locking pin (12) and wherein said elastic element (13) is connected at one end to said projection (121) and at the other end to said mounting bracket (11).

7. The telescopic leg according to any one of claims 2 to 6, characterized in that the mounting bracket (11) comprises a bracket main body (114), and a limit plate (115) and a guide plate (116) connected to the bracket main body (114), the bracket main body (114) being formed as a U-shaped plate comprising a first bracket (1141) and a second bracket (1142) oppositely disposed in an axial direction of the latch body (122), and a third bracket (1143) formed between the first bracket (1141) and the second bracket (1142), the limit plate (115) and the guide plate (116) being disposed between the first bracket (1141) and the second bracket (1142) and being angularly arranged,

the lock pin body (122) is axially movably and circumferentially rotatably arranged in the first bracket (1141) and the second bracket (1142), the limiting groove is formed on the limiting plate (115), and the guide groove (110) is formed on the guide plate (116).

8. Telescopic leg according to any one of claims 1-6, wherein the first actuation part (120) is a first wedge surface formed on the side of the locking pin (12) close to the locking hole (21), and the second actuation part (22) is a second wedge surface formed on the locking plate (2), the first and second wedge surfaces wedge-engaging during retraction of the movable leg (20).

9. Telescopic leg according to any one of claims 1-6, further comprising a reinforcement plate (4), wherein the reinforcement plate (4) connects the locking plate (2) and the fixed leg (10) or wherein the reinforcement plate (4) connects the locking plate (2) and the movable leg (20).

10. A vehicle, characterized in that it comprises a telescopic leg according to any one of claims 1-9.