CN218950891U - Improved tray heightening jack - Google Patents
Improved tray heightening jack Download PDFInfo
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- CN218950891U CN218950891U CN202223585247.3U CN202223585247U CN218950891U CN 218950891 U CN218950891 U CN 218950891U CN 202223585247 U CN202223585247 U CN 202223585247U CN 218950891 U CN218950891 U CN 218950891U
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- tray
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Abstract
The present utility model relates to a hoisting machine. The purpose is to provide an improvement tray increases jack, and this jack should be able to obviously increase and lift the height to have easy operation swiftly, spare part can not lose characteristics. The technical scheme is an improvement tray increases jack, its characterized in that: the first tray is connected with a shaft sleeve provided with a shaft hole, and a heightening assembly with a second tray is detachably and vertically arranged in the shaft hole; the heightening assembly comprises a step screw sleeve which can be positioned in the shaft hole in a rotating mode around a vertical axis and a tray screw rod which is fixed at the bottom end of the second tray and matched with the step screw sleeve through a thread structure.
Description
Technical Field
The utility model relates to a hoisting machine, in particular to an improved tray heightening jack.
Background
As a small-sized lifting device, a jack is widely used in industries such as automobile maintenance and the like. In order to overcome the problem of insufficient lifting height of the existing jack, CN209778155U discloses a portable tray heightening jack; specifically, an extension section is arranged at the center of the bottom of the tray; the tray is connected with the lifting arm into a whole through the heightening assembly; the heightening assembly comprises a positioning head fixedly connected with the lifting arm through a fastener and a plurality of heightening heads which are sequentially connected in an inserting mode and detachably arranged between the positioning head and the tray so as to adjust the lifting range of the tray. The structure can obviously improve the lifting height of the jack, but has the following parts: the original conventional tray needs to be disassembled when the tray is heightened, and the tray is fixed by bolts, so that the operation is relatively troublesome; and after the heightening component is installed, the detached conventional tray needs to be stored additionally, so that the jack can not restore the original lower lifting height easily due to loss.
Disclosure of Invention
The utility model aims to overcome the defects of the background technology and provide an improved tray heightening jack which can obviously increase the lifting height and has the characteristics of simple and quick operation and no loss of parts.
The technical scheme provided by the utility model is as follows:
an improved tray heightening jack comprises a base, an oil cylinder, an oil pump, a pressing handle, a lifting arm and a first tray, wherein the base is formed by two wallboards and provided with wheels, the oil cylinder and the oil pump are arranged on the base, the pressing handle drives a pump core of the oil pump to move, the handle is connected with the pressing handle, the lifting arm is rotatably hinged between the two wallboards and driven by the oil cylinder, and the first tray is arranged at a lifting end of the lifting arm through a tray seat and used for lifting heavy objects; the method is characterized in that: the first tray is connected with a shaft sleeve provided with a shaft hole, and a heightening assembly with a second tray is detachably and vertically arranged in the shaft hole; the heightening assembly comprises a step screw sleeve which can be positioned in the shaft hole in a rotating mode around a vertical axis and a tray screw rod which is fixed at the bottom end of the second tray and matched with the step screw sleeve through a thread structure.
The first tray is rotatably positioned on the tray seat at the lifting end through a first positioning structure; the first positioning structure comprises a shaft sleeve coaxially fixed with the first tray and extending downwards from the bottom end of the first tray, a positioning groove circumferentially surrounding the outer circumferential surface of the shaft sleeve, a first pin hole radially formed in the tray seat and correspondingly arranged with the positioning groove, and a first positioning pin matched with the first pin hole through a threaded structure and inserted into the positioning groove at the top end.
The outer circumferential surface of the stepped screw sleeve is provided with a stepped structure, and screw holes penetrating through the whole screw sleeve are coaxially arranged; the smaller outer diameter part in the step structure is rotatably inserted and matched with the shaft hole, and the step end face of the step part is in propping and matched with the top end face of the shaft sleeve.
The bottom of the step screw sleeve exposes an overhanging end from the lower end of the shaft hole; the second tray is rotatably positioned in the shaft hole through a second positioning structure; the second positioning structure comprises a second positioning pin hole arranged at the overhanging end, a second pin hole which is radially arranged on the tray seat and is correspondingly arranged with the second positioning pin hole, and a second positioning pin which is matched with the second pin hole through a threaded structure and is inserted into the second positioning pin hole at the top end.
The second locating pin is a locating pin with a pressure spring.
The base is provided with a positioning seat for positioning the heightening component. The positioning seat is positioned at the front side of the press handle and comprises a flat plate which is horizontally fixed and is provided with a positioning hole, and the aperture of the positioning hole is suitable for the position of the smaller outer diameter in the step screw sleeve so as to be beneficial to the plug-in positioning of the heightening component.
The application mode of the utility model is as follows: the utility model retains the original function of the first tray and can be used for lifting weights at lower positions. When the lifting height is required to be lifted (such as an automobile with a higher chassis), the heightening component is only required to be taken out and inserted into the first tray (the heightening component is prevented from falling off by the second positioning pin); when the height of the heightening component needs to be adjusted, only the second tray (the second tray and the tray screw rod rotate relatively to obtain the required height) needs to be rotated.
The beneficial effects of the utility model are as follows:
the utility model can utilize the original first tray to lift the weight at the lower position; the lifting assembly is simple and quick to replace when lifting the heavy objects at the higher positions, and reliable in work, so that the application range is remarkably widened. In addition, the heightening component is arranged at a special position in a non-use loading state, so that the heightening component cannot be lost and cannot interfere with the operation of the first tray.
Drawings
Fig. 1 is a schematic diagram of a front view structure of an embodiment of the present utility model.
FIG. 2 is a schematic diagram of the usage status of an embodiment of the present utility model.
1. A tray base; 2. a second positioning pin; 2.1, a second pin hole; 3. a pressure spring; 4. a wheel; 5. a handle; 6. a wallboard; 7. a first tray; 7.1, shaft sleeve; 7.2, a positioning groove; 8. a first positioning pin; 8.1, a first pin hole; 9. a boom; 9.1, a tray seat; 10. a second dowel hole; 11. a step screw sleeve; 12. a second tray; 13. a tray screw rod; 14. a pressing hand; 15. and a positioning seat.
Detailed Description
Further description will be made with reference to the embodiments shown in the drawings.
The improved pallet heightening jack shown in the drawing comprises a base which is composed of two wallboards 6 and provided with wheels 5, an oil cylinder and an oil pump which are arranged on the base, a pressing handle 14 for driving the pump core of the oil pump to move, a handle connected with the pressing handle, a lifting arm 9 which is rotatably hinged between the two wallboards and is driven by the oil cylinder, and a first pallet 7 which is arranged on a pallet seat at the top end of the lifting arm and is used for lifting heavy objects; the above structure is similar to a conventional jack.
The improvement of the utility model is that: the first tray is provided with a shaft hole, a heightening assembly with a second tray is additionally designed, and the heightening assembly can be vertically arranged in the shaft hole according to the requirement, or the heightening assembly is detached and separated from the first tray to be additionally placed. In the heightening assembly, the step screw sleeve 11 is vertically positioned in the shaft hole and can rotate around the shaft hole axis; the tray screw rod 13 is fixed at the bottom end of the second tray and is matched with the step screw sleeve through a thread structure (a screw hole which can be matched with the tray screw rod is formed in the step screw sleeve).
The first tray is rotatably positioned on the tray seat 9.1 by means of a first positioning structure. In the first positioning structure, the shaft sleeve 7.1 is coaxially fixed (preferably welded and fixed) with the first tray and extends downwards from the bottom end of the first tray; the outer circumferential surface of the shaft sleeve is circumferentially provided with a positioning groove 7.2, and a first pin hole 8.1 is radially formed in the tray seat and is correspondingly arranged with the positioning groove; the first positioning pin 8 is in threaded engagement with the first pin hole and the top end of the first positioning pin is inserted into the positioning groove, so that the first tray can only rotate on the tray seat but cannot axially move.
The outer circumferential surface of the stepped screw sleeve is provided with a stepped structure, and screw holes which are coaxially arranged penetrate through the whole screw sleeve; the smaller outer diameter part in the step structure is rotatably inserted and matched with the shaft hole, and the step end face of the step part is propped against the top end face of the shaft sleeve and the inner surface of the first tray; to transfer the weight borne to the tray seat. The length of the smaller outer diameter part of the stepped screw sleeve is larger than that of the shaft sleeve, so that the bottom of the smaller outer diameter part extends out from the lower end hole of the shaft hole and exposes an overhanging end; the second tray is rotatably positioned on the tray seat through a second positioning structure. In the second positioning structure, a second positioning pin hole 10 is formed in the outer circumferential surface of the overhanging end; the second pin hole 2.1 is horizontally arranged on the tray seat, and two ends of the second pin hole penetrate through the tray seat and then correspond to the second positioning pin hole; the second positioning pin 2 is arranged in the second pin hole, and the top end of the second positioning pin is inserted into the second positioning pin hole; so that the step screw is positioned in the first tray without being able to rotate and move axially.
The second positioning pin is a positioning pin (conventional structure) with a pressure spring 3; the top end of the positioning pin is propped against the positioning pin hole of the step screw sleeve by means of the pressure spring force, so that the stability and the reliability in working are ensured; when the tray is in a non-working state, the handle 5 of the second locating pin can be pulled to enable the second locating pin to be separated from the step screw sleeve, and the heightening assembly can be separated from the first tray.
The base is provided with a positioning seat 15 for positioning the heightening component. The positioning seat is positioned at the front side of the press handle and comprises a flat plate which is horizontally fixed and is provided with a positioning hole, and the aperture of the positioning hole is suitable for the position of the smaller outer diameter in the step screw sleeve so as to be beneficial to the plug-in positioning of the heightening component.
Claims (6)
1. An improved tray heightening jack comprises a base, an oil cylinder, an oil pump, a pressing handle, a lifting arm (9) and a first tray (7), wherein the base is formed by two wallboards (6) and provided with wheels (4), the oil cylinder and the oil pump are arranged on the base, the pressing handle is used for driving the oil pump core of the oil pump to move, the lifting arm is rotatably hinged between the two wallboards and driven by the oil cylinder, and the first tray (7) is arranged at the lifting end of the lifting arm through a tray seat (1) and used for lifting a heavy object; the method is characterized in that: the first tray is connected with a shaft sleeve (7.1) provided with a shaft hole, and a heightening assembly with a second tray (12) is detachably and vertically arranged in the shaft hole; the heightening assembly comprises a step screw sleeve (11) which can be positioned in the shaft hole in a rotating mode around a vertical axis and a tray screw rod (13) which is fixed at the bottom end of the second tray and matched with the step screw sleeve through a thread structure.
2. The improved pallet jack of claim 1 wherein: the first tray is rotatably positioned on the tray seat at the lifting end through a first positioning structure; the first positioning structure comprises a shaft sleeve coaxially fixed with the first tray and extending downwards from the bottom end of the first tray, a positioning groove (7.2) circumferentially arranged around the outer circumferential surface of the shaft sleeve, a first pin hole (8.1) radially formed in the tray seat and correspondingly arranged with the positioning groove, and a first positioning pin (8) matched with the first pin hole through a threaded structure and inserted into the positioning groove at the top end.
3. The improved pallet jack of claim 2 wherein: the outer circumferential surface of the stepped screw sleeve is provided with a stepped structure, and screw holes penetrating through the whole screw sleeve are coaxially arranged; the smaller outer diameter part in the step structure is rotatably inserted and matched with the shaft hole, and the step end face of the step part is in propping and matched with the top end face of the shaft sleeve.
4. The improved pallet jack of claim 3 wherein: the bottom of the step screw sleeve exposes an overhanging end from the lower end of the shaft hole; the second tray is rotatably positioned in the shaft hole through a second positioning structure; the second positioning structure comprises a second positioning pin hole (10) arranged at the overhanging end, a second pin hole (2.1) which is radially arranged on the tray seat and is correspondingly arranged with the second positioning pin hole, and a second positioning pin (2) which is matched with the second pin hole through a thread structure and is inserted into the second positioning pin hole at the top end.
5. The improved pallet jack of claim 4 wherein: the second locating pin is a locating pin with a pressure spring (3).
6. The improved pallet jack of claim 5 wherein: the base is provided with a positioning seat for positioning the heightening component, the positioning seat is positioned at the front side of the pressing hand and comprises a flat plate which is horizontally fixed and is provided with a positioning hole, and the aperture of the positioning hole is suitable for the position of the smaller outer diameter in the step screw sleeve so as to be beneficial to the plug-in positioning of the heightening component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223585247.3U CN218950891U (en) | 2022-12-30 | 2022-12-30 | Improved tray heightening jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223585247.3U CN218950891U (en) | 2022-12-30 | 2022-12-30 | Improved tray heightening jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218950891U true CN218950891U (en) | 2023-05-02 |
Family
ID=86110796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223585247.3U Active CN218950891U (en) | 2022-12-30 | 2022-12-30 | Improved tray heightening jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218950891U (en) |
-
2022
- 2022-12-30 CN CN202223585247.3U patent/CN218950891U/en active Active
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