Mechanical jack for automobile
阅读说明:本技术 机械式汽车千斤顶 (Mechanical jack for automobile ) 是由 李焕能 刘辉 杨秀军 于 2019-11-21 设计创作,主要内容包括:本发明公开了一种机械式汽车千斤顶,包括顶板(1),推力轴承(2),顶杆螺栓(3),转接段(4)和底座(5),底座(5)外表面设置有螺纹;转接段(4)上设置有同轴但大径不同的第一内螺纹段和第二内螺纹段,第一内螺纹段与底座(5)的螺纹连接;顶杆螺栓(3)的螺杆段与转接段(4)上的第二内螺纹段连接;顶板(1)的上端面为一支撑平面,顶板(1)的下端面上开有内孔,内孔中设置有推力轴承(2),推力轴承(2)与顶杆螺栓(3)的一端连接。本发明携带方便,使用简单省力,支撑高度可调。(The invention discloses a mechanical automobile jack, which comprises a top plate (1), a thrust bearing (2), a mandril bolt (3), a switching section (4) and a base (5), wherein the outer surface of the base (5) is provided with threads; the switching section (4) is provided with a first internal thread section and a second internal thread section which are coaxial but have different major diameters, and the first internal thread section is in threaded connection with the base (5); the screw section of the ejector rod bolt (3) is connected with the second internal thread section on the switching section (4); the upper end face of the top plate (1) is a supporting plane, an inner hole is formed in the lower end face of the top plate (1), a thrust bearing (2) is arranged in the inner hole, and the thrust bearing (2) is connected with one end of the ejector bolt (3). The invention has the advantages of convenient carrying, simple and labor-saving use and adjustable supporting height.)
1. Mechanical type automobile jack, its characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the outer surface of the base (5) is provided with threads;
the connecting device comprises a connecting section (4), wherein a first internal thread section and a second internal thread section which are coaxial but have different major diameters are arranged on the connecting section (4), and the first internal thread section is in threaded connection with a base (5);
the screw section of the ejector rod bolt (3) is connected with the second internal thread section on the switching section (4);
the ejector pin bolt comprises a top plate (1), wherein the upper end face of the top plate (1) is a supporting plane, an inner hole is formed in the lower end face of the top plate (1), a thrust bearing (2) is arranged in the inner hole, and the thrust bearing (2) is connected with one end of an ejector pin bolt (3).
2. The mechanical jack of claim 1, wherein: a screw hole is formed in the outer surface of the base (5) in a threaded position, the axis of the screw hole is perpendicular to the axis of the base (5), and a locking nail (6) is detachably connected in the screw hole.
3. The mechanical jack of claim 1, wherein: the outer surface of the base (5) is provided with a circle of annular steps, and the outer diameter of each annular step is equal to that of the switching section (4).
4. The mechanical jack of claim 1, wherein: the lower end face of the base (5) is provided with a pin hole.
5. The mechanical jack of claim 1, wherein: the lower end face of the base (5) is provided with a through hole which penetrates through the upper end face and the lower end face of the base (5).
6. The mechanical jack of claim 1, wherein: the adapter coupling section (4) is a cylinder, a step through hole penetrating through the upper end face and the lower end face of the cylinder is formed in the axis direction of the adapter coupling section (4), the inner surfaces of the step through hole are respectively arranged on the first internal thread section and the second internal thread section, a threaded hole penetrating through the wall thickness of the adapter coupling section (4) is formed in the adapter coupling section (4), and the threaded hole is located at the first internal thread section.
7. The mechanical jack of claim 1, wherein: and a hexagonal boss is arranged on the ejector rod bolt (3).
8. The mechanical jack of claim 6, wherein: at least one hole is formed in the circumferential side surface of the hexagonal boss.
9. The mechanical jack of claim 1, wherein: and a circular boss is arranged on the ejector rod bolt (3), and the outer diameter of the circular boss is larger than the hole diameter of an inner hole of an outer ring of the thrust bearing (2).
10. The mechanical jack of claim 1, wherein: a groove is formed in the supporting plane of the top plate (1) and penetrates through the circumferential side surface of the top plate (1).
Technical Field
The invention relates to a jack, in particular to a jacking structure and a height adjusting structure of the jack.
Background
The automobile becomes a main vehicle in our life, and a jack which is a tool for temporarily supporting the automobile when tires are replaced, pits and the like are inevitably encountered during a journey, and large-scale hoisting equipment such as an electric crane cannot be used due to the fact that the jack is far away from a repair shop. The existing automobile jack used on a vehicle is a practical jack which has the characteristics of convenience in carrying, simplicity in use, small force application and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a mechanical automobile jack which has the characteristics of convenience in carrying, simplicity and labor saving in use, adjustable supporting height and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a mechanical jack for an automobile comprises a jack body,
the outer surface of the base is provided with threads;
the adapter section is provided with a first internal thread section and a second internal thread section which are coaxial but have different major diameters, and the first internal thread section is in threaded connection with the base;
the screw rod section of the ejector rod bolt is connected with the second internal thread section on the switching section;
the ejector pin bolt comprises a top plate, wherein the upper end surface of the top plate is a supporting plane, an inner hole is formed in the lower end surface of the top plate, a thrust bearing is arranged in the inner hole, and the thrust bearing is connected with one end of the ejector pin bolt.
Furthermore, a screw hole is arranged at the thread position on the outer surface of the base, the axis of the screw hole is vertical to the axis of the base, and a locking nail is detachably connected in the screw hole.
Furthermore, the outer surface of the base is provided with a circle of annular steps, and the outer diameter of each annular step is equal to that of the corresponding switching section.
Furthermore, a pin hole is formed in the lower end face of the base.
Furthermore, the lower end surface of the base is provided with a through hole which penetrates through the upper end surface and the lower end surface of the base.
Furthermore, the switching section is the cylinder, and it has the ladder through-hole that runs through the cylinder upper and lower terminal surface to open along the axis direction of switching section, first internal thread section and second internal thread section set up ladder through-hole internal surface respectively, and it has a screw hole that runs through the switching section wall thickness to open on the switching section, and the screw hole is located first internal thread section department.
Furthermore, a hexagonal boss is arranged on the ejector rod bolt.
Further, at least one hole is formed in the circumferential side surface of the hexagonal boss.
Furthermore, a circular boss is arranged on the ejector rod bolt, and the outer diameter of the circular boss is larger than the hole diameter of an inner hole of an outer ring of the thrust bearing.
Further, a groove is formed in the supporting plane of the top plate, and the groove penetrates through the circumferential side surface of the top plate.
The invention has the following characteristics:
(1) jacking is realized through threads, and the jacking device is stable, reliable and easy to machine;
(2) because the thrust bearing is added, the jacking process of the jack is more labor-saving (the stress is changed in the rotating process), and when a heavy object is pressed on the top plate, the top plate does not need to rotate along with the rotation of the ejector rod bolt, so that the friction force between the heavy object and the top plate in the jacking process is reduced;
(3) the thrust bearing is arranged in an inner hole at the lower end of the top plate, and meanwhile, the surface of the circular boss on the ejector rod bolt is used as a closed end surface to seal the thrust bearing in the inner hole, so that on one hand, the influence of the external environment on the thrust bearing (such as the influence of sand and stone or dust) can be avoided, the thrust bearing is in a relatively sealed environment, on the other hand, the thrust bearing in the inner hole is more convenient to lubricate, lubricating grease is not easy to overflow, and the service life of the thrust bearing is prolonged;
(4) the two sections of threads on the switching section are designed, so that the jacking distance of the jack is greatly prolonged, and a two-section telescopic structure is formed, thereby not only facilitating the improvement of the jacking stroke, but also being easy to shrink and fold;
(5) the whole upper end surface of the top plate is a plane, and the plane is also provided with a groove, the shape of the groove can be designed according to the shape of the contact surface of the jacked weight (for example, when the jacked weight is an automobile, the groove can be designed according to the shape of an automobile chassis), so that the whole supporting plane is not damaged, and the special weight support can be adapted;
(6) the base is provided with a pin hole, so that the base can be conveniently fixed by a pin (particularly suitable for a relatively soft gravel road surface), and the situation that heavy objects fall due to the fact that the base is driven to rotate together in the rotating process of the rotating ejector rod bolt or the base displaces in the jacking process is prevented;
(7) the lower end face of the base is provided with a through hole penetrating through the upper end face and the lower end face of the base, and when the ejector rod bolt moves in the through hole, the phenomenon that the rotation resistance is increased due to the fact that large air pressure is formed due to good thread sealing performance is avoided, and the exhaust effect is achieved;
(8) the hexagonal boss is convenient to operate as a structure matched with a wrench, and when the wrench is not used, the hexagonal boss can rotate by taking the hole in the surface as an action point;
(9) the locking nail is used as a fixing structure to prevent the first internal thread section and the thread on the outer surface of the base from relatively rotating, so that a fixing effect is achieved;
(10) the outer surface of the base is provided with a circle of annular steps, and the step surfaces of the steps are used as supporting surfaces when the threads of the ejector rod are lowered to the lowest position.
The invention is mainly characterized in that a rotary lifting mode of multi-section thread combination is used, and the principle that the rotating force required by a bearing is small is adopted, the two are combined and applied to the jack, and the jack has the advantages of convenience in carrying, small occupied space, quickness in lifting, small rotating moment and the like.
Drawings
FIG. 1, FIG. 1-1 and FIG. 1-2 are schematic top plates;
FIG. 2 and FIG. 2-1 are schematic views of a jack bolt;
FIG. 3 is a schematic view of a transition section;
FIGS. 4 and 4-1 are schematic views of the base;
FIG. 5 is a schematic view of the jack after being assembled;
in the figure, 1 a top plate; 2, a thrust bearing; 3, a mandril bolt; 4, switching section; 5, a base; 6 locking the nail.
Detailed Description
The idea of the present invention is further described in detail below with reference to the drawings and examples of the specification.
The principle of the invention is that the lifting height is raised by utilizing the rotation of the screw thread, but the bearing structure is adopted, the lifting height and various operation structures are optimized, the lifting height can be easily raised by utilizing a spanner or a screwdriver, and the lifting stroke can be adjusted according to vehicle types with different supporting heights.
As shown in fig. 5, in this embodiment, the mechanical jack mainly includes 6 parts, the first is a
top plate 1: as shown in fig. 1, 1-1 and 1-2, the
The thrust bearing 2: the thrust bearing 2 is a single-row radial thrust ball bearing or a thrust ball bearing, belongs to a standard part, and can be directly purchased in the market.
Ejector bolt 3: as shown in figures 2 and 2-1, the
The switching section 4: referring to fig. 3, the
Base 5: as shown in fig. 4 and 4-1, the
The locking nail 6: the part is a standard part and is commercially available as an M6 screw.
During manufacturing, the bearing is processed according to the dimensions of figures 1, 1-2, 2-1, 3, 4 and 4-1, the dimension A, B is processed according to the excircle and the inner hole of the bearing, the interference fit of 0.01-0.05 is guaranteed, and the height of C, D from the ground can be properly adjusted according to the low fit of different vehicle types. And selecting 45# hardening and tempering materials for the parts. In order to ensure the service life and long service time, the material is subjected to quenching and tempering heat treatment before processing. To prevent the jig from rusting, all surfaces except the bearing were flanged. Knurling can be carried out on the end face of the
The installation and use method comprises the following steps:
the general structure of the jack is as shown in fig. 5, wherein a
When the automobile lifting device is used, an automobile is moved to a place where the ground is hard, the