Hand crank structure of trailer jack

Abstract

The utility model discloses a hand crank structure of trailer jack, characterized by: including pivot, handle component, spring and positioning ring, the end of handle component has the circumferential positioning hole, and handle component is through the circumferential positioning hole and is installed on the pivot, and can move on the pivot axial direction, be provided with the circumferential positioning piece in the moving range of pivot corresponding handle component, when handle component slides outward, the circumferential positioning hole and the circumferential positioning piece match synchronous rotation, when handle component slides inwards, the circumferential positioning hole and the circumferential positioning piece separate, the spring is installed on the pivot, and handle component is pushed to the circumferential positioning piece outward, the positioning ring is set up on the positioning cover of jack, can position handle component in the inside of pivot. The utility model solves the problem that handle is easy to be accidentally rotated and can not be positioned in the required position.

Description

Technical Field

[0001] This utility model relates to the field of jacks, and in particular to a hand crank structure for a trailer jack. Background Technology

[0002] Currently available trailers are generally attached to the rear of a vehicle via a trailer hitch, used to carry luggage, cargo, etc. A jack is typically installed at the front of the trailer to lift it, facilitating its attachment to or removal from the rear of the vehicle.

[0003] In existing technology, the jack structure on a trailer typically includes a positioning sleeve, a moving sleeve, and a transmission assembly. The positioning sleeve contains a lead screw, and the moving sleeve is fitted inside the positioning sleeve, with a nut sleeve inside that mates with the lead screw. The transmission assembly includes two bevel gears and a rotating shaft. One bevel gear is fixed to the top of the lead screw, and the rotating shaft is located on the top of the positioning sleeve. The other bevel gear is fixed to the rotating shaft and mates with the bevel gear on the lead screw. A handle is connected to the outer end of the rotating shaft. By rotating the handle, the rotating shaft rotates, driving the bevel gear and the lead screw to rotate, thus moving the moving sleeve up and down. Currently, the handle is a fixed structure, which means its position cannot be fixed according to needs, often occupying space, and there is also the problem of accidental contact leading to accidental rotation. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hand crank structure for a trailer jack, solving the problems of the handle being easily turned accidentally and being unable to be positioned in the desired location.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A hand crank structure for a trailer jack, characterized in that it includes a pivot, a handle assembly, a spring, and a positioning ring; The end of the handle assembly has a circumferential positioning hole, and the handle assembly is fitted onto the rotating shaft through the circumferential positioning hole and can move axially on the rotating shaft; A circumferential positioning component is provided within the moving range of the handle assembly corresponding to the rotating shaft. When the handle assembly slides outward, the circumferential positioning hole and the circumferential positioning component rotate synchronously. When the handle assembly slides inward, the circumferential positioning hole and the circumferential positioning component separate. The spring is mounted on the pivot and pushes the handle assembly outward onto the circumferential positioning component; The positioning ring is set on the positioning sleeve of the jack, which can position the handle assembly inside the rotating shaft.

[0006] Preferably, the circumferential positioning component is a hexagonal sleeve, and the circumferential positioning hole is a hexagonal hole that mates with the hexagonal sleeve.

[0007] Preferably, the port of the circumferential positioning hole is a flared structure, and the inner end of the circumferential positioning member is a circular structure.

[0008] Preferably, the handle assembly has a positioning hole, and a positioning bolt is provided in the positioning hole. After the positioning bolt is tightened, its end presses against the circumferential positioning member.

[0009] Preferably, the positioning ring has a C-shaped structure, with both ends connected to the positioning sleeve of the jack. When the positioning ring rotates toward the handle assembly, it can hook the positioning bolt, keeping the handle assembly inside the rotating shaft.

[0010] Preferably, the handle assembly includes a connector, an extension rod, and a handle; The connector has pins and circumferential positioning holes. The end of the extension rod has a slot that mates with the pin; The handle is attached to the end of the extension rod away from the connector.

[0011] The advantages of this utility model are: 1. When the handle assembly is not in use, press the handle assembly inward and lock it with the positioning ring to disengage the handle assembly from the circumferential positioning part, so that the rotating shaft cannot be rotated accidentally. At the same time, the handle assembly is effectively fixed by the positioning ring and will not wobble. When the handle assembly is needed, turn the pull ring to move the handle assembly outward and engage with the circumferential positioning part. It is convenient to use. 2. When the handle assembly is not in use, since the circumferential positioning part is a hexagonal sleeve, it can be used with an electric structure to rotate the shaft electrically. 3. After the handle assembly is separated from the circumferential positioning component, the handle assembly can rotate freely. Therefore, after the handle assembly is separated from the circumferential positioning component at any angle, it can rotate to a vertical position and be locked by the positioning ring in this position, reducing space occupation. 4. The handle assembly can switch between usage states simply by moving inwards and outwards, featuring a simple structure and minimal space occupation; 5. When there is no need to position the handle assembly, the positioning ring can also be used as a lifting ring to facilitate the jack's retrieval. Attached Figure Description

[0012] Figure 1 This is an exploded view of the hand crank structure of the trailer jack provided in this embodiment; Figure 2 This is a schematic diagram showing the handle assembly provided in this embodiment in an outward-moving, i.e., handle-driven state; Figure 3 This is a schematic diagram showing the handle assembly provided in this embodiment in an inward-moving, i.e., electrically driven state. Detailed Implementation

[0013] Combination Figures 1 to 3 The hand crank structure of the trailer jack of this utility model will be further explained.

[0014] A hand crank structure for a trailer jack, characterized by comprising a pivot 3, a handle assembly 6, a spring 4, and a positioning ring 2.

[0015] The rotating shaft 3 is horizontally mounted on the positioning sleeve 1 of the jack. A bevel gear is connected to the part of the rotating shaft 3 located inside the positioning sleeve 1, which cooperates with the bevel gear on the lead screw. The part of the rotating shaft 3 exposed outside the positioning sleeve 1 is used for connection of the handle assembly 6. The end of the handle assembly 6 has a circumferential positioning hole 64. The handle assembly 6 is fitted onto the part of the rotating shaft 3 located outside the positioning sleeve 1 through the circumferential positioning hole 64, and can move axially on the rotating shaft 3.

[0016] A circumferential positioning element 5 is provided within the moving range of the rotating shaft 3 corresponding to the handle assembly 6. The circumferential positioning element 5 is located at the outermost end of the rotating shaft. When the handle assembly 6 slides outward, the circumferential positioning hole 64 cooperates with the circumferential positioning element 5, and the two rotate synchronously. When the handle assembly 6 slides inward, the circumferential positioning hole 64 separates from the circumferential positioning element 5, and the two rotate independently.

[0017] The spring 4 is fitted onto the rotating shaft 3, with one end abutting against the positioning sleeve 1 and the other end abutting against the handle assembly 6, pushing the handle assembly 6 outward onto the circumferential positioning member 5. The positioning ring 2 is set on the positioning sleeve 1 of the jack, which can position the handle assembly 6 on the inner side of the rotating shaft 3, so that the circumferential positioning hole 64 is separated from the circumferential positioning member 5.

[0018] The circumferential positioning component 5 is a hexagonal sleeve, which is fitted onto the end of the rotating shaft 3 and then locked in place by a positioning pin. The circumferential positioning hole 64 is a hexagonal hole that mates with the hexagonal sleeve, enabling circumferential positioning between the two. Furthermore, the hexagonal sleeve has a hexagonal shape, allowing tools with internal hexagonal holes to be inserted to cooperate with the electric mechanism to rotate the rotating shaft.

[0019] The port of the circumferential positioning hole 64 is a flared structure, and the inner end of the circumferential positioning component 5 is a circular structure 53. When the handle assembly 6 moves from the inside to the outside, the flared structure and the circular structure can easily fit the circumferential positioning hole 64 onto the circumferential positioning component 5.

[0020] The handle assembly 6 has a positioning hole 52 at its end, and a positioning bolt 7 is provided in the positioning hole 52. After the positioning bolt 7 is tightened, its end can press against the circumferential positioning member 5, so as to prevent the circumferential positioning hole 64 from accidentally disengaging from the circumferential positioning member 5 when the handle assembly 6 drives the rotating shaft 3 to rotate.

[0021] The positioning ring 2 has a C-shaped structure. Both ends of the positioning ring 2 are connected to the positioning sleeve 1 of the jack 10. When the positioning ring 2 rotates toward the handle assembly 6, the positioning ring 2 can hook the positioning bolt 7 on the inwardly moving handle assembly 6, so that the handle assembly 6 is kept inside the rotating shaft 3 and disengaged from the circumferential positioning part 5.

[0022] The handle assembly 6 includes a connector 61, an extension rod 62, and a handle 63.

[0023] A circumferential positioning hole 64 is formed on the connector 61, so that the connector 61 fits on the rotating shaft 3. The connector 61 has a radially outwardly extending pin 611, which is located on the opposite side of the positioning hole 52 on the positioning sleeve 1. The end of the extension rod 62 has a slot that fits with the pin, and the two are locked together by bolts. The handle is connected to the end of the extension rod 62 away from the connector 61, so as to facilitate the rotation of the entire handle assembly 6.

[0024] The method of using this utility model is as follows: when the handle assembly 6 is not needed, press the handle assembly 6 inward, and then tighten the positioning bolt 7 through the positioning ring 2, so that the handle assembly 6 is disengaged from the circumferential positioning part 5, so that the rotating shaft 3 cannot be rotated accidentally. At the same time, the handle assembly 6 is effectively fixed by the positioning ring 2 and will not shake randomly. When the handle assembly 6 needs to be used, turn the pull ring to move the handle assembly 6 outward and cooperate with the circumferential positioning part 5. It has the characteristics of convenient use.

[0025] Unless otherwise specified, in this utility model, terms such as "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

Claims

1. A hand crank structure for a trailer jack, characterized in that: Includes a pivot, handle assembly, spring, and positioning ring; The end of the handle assembly has a circumferential positioning hole, and the handle assembly is fitted onto the rotating shaft through the circumferential positioning hole and can move axially on the rotating shaft; A circumferential positioning component is provided within the moving range of the handle assembly corresponding to the rotating shaft. When the handle assembly slides outward, the circumferential positioning hole and the circumferential positioning component rotate synchronously. When the handle assembly slides inward, the circumferential positioning hole and the circumferential positioning component separate. The spring is mounted on the pivot and pushes the handle assembly outward onto the circumferential positioning component; The positioning ring is set on the positioning sleeve of the jack, which can position the handle assembly inside the rotating shaft.

2. The hand crank structure of the trailer jack according to claim 1, characterized in that: The circumferential positioning component is a hexagonal sleeve, and the circumferential positioning hole is a hexagonal hole that mates with the hexagonal sleeve.

3. The hand crank structure for a trailer jack according to claim 2, characterized in that: The port of the circumferential positioning hole is flared, and the inner end of the circumferential positioning component is circular.

4. The hand crank structure of the trailer jack according to claim 1, characterized in that: The handle assembly has a positioning hole, and a positioning bolt is provided in the positioning hole. After the positioning bolt is tightened, its end presses against the circumferential positioning part.

5. The hand crank structure of the trailer jack according to claim 3, characterized in that: The positioning ring has a C-shaped structure, and its two ends are connected to the positioning sleeve of the jack. When the positioning ring rotates toward the handle assembly, it can hook the positioning bolt, keeping the handle assembly inside the rotating shaft.

6. The hand crank structure of the trailer jack according to claim 1, characterized in that: The handle assembly includes a connector, an extension rod, and a handle; The connector has pins and circumferential positioning holes. The end of the extension rod has a slot that mates with the pin; The handle is attached to the end of the extension rod away from the connector.

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