CN217516590U

CN217516590U - Worm gear type twin jack

Info

Publication number: CN217516590U
Application number: CN202221178257.2U
Authority: CN
Inventors: 朱小东; 尹红炎; 张军辉; 高伶俐; 马强; 靳朝
Original assignee: Henan Yongrong Power Technology Co ltd
Current assignee: Henan Yongrong Power Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-09-30
Anticipated expiration: 2032-05-17

Abstract

The utility model discloses a worm gear type twin jack, belonging to the technical field of jacks, comprising a jack body, a worm, a driven shaft and a sliding sleeve. The jack body is rotatably connected, the lower part of the driven shaft is provided with a worm wheel that engages with the worm, the upper part of the driven shaft is provided with an external thread, and the sliding sleeve is provided with an internal thread matched with the external thread, The sliding sleeve is threadedly connected with the driven shaft, the jack body is provided with a guide groove for the sliding sleeve to pass through, and a top plate is connected to the top of the sliding sleeve. The utility model adopts the double screw mechanism to be fixedly connected with the top plate, the supporting structure is more stable, and the supporting amount is also increased; the lead angle of the worm is smaller than the equivalent friction angle between the meshing gear teeth, and the mechanism is self-locking, which can realize reverse Self-locking, that is, only the worm gear can be driven by the worm, and the worm cannot be driven by the worm gear, which can play a role in safety protection.

Description

Worm gear type twin jack

Technical Field

The utility model relates to a jack technical field, in particular to worm gear formula twin jack.

Background

The jack is light and small lifting equipment which takes a rigid jacking piece as a working device and jacks a heavy object through a top bracket or a bottom supporting claw within a small stroke. The jack is mainly used for the departments of factories, mines, transportation and the like as vehicle repair and other lifting, supporting and the like. The structure is light and firm, flexible and reliable, and can be carried and operated by one person

The jack can be divided into a rack jack, a screw jack and a hydraulic jack according to the structural characteristics. The screw jack is the most common jack, and the threads of the existing screw jack have no self-locking function and are provided with a brake. When the brake is released, the heavy object can be quickly lowered by itself to shorten the return time, but the structure of the jack is complex. The screw jack can support heavy objects for a long time, the maximum lifting capacity reaches 100 t, and the application is wide. After the horizontal screw rod is arranged on the lower part, the heavy object can also move transversely at a small distance. In addition, the existing screw jack only adopts one screw rod to lift, so that the lifting capacity is limited and the problem of unstable support also exists.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a wheeled twin jack solves the limited and unstable problem of support of current screw jack-up weight.

(II) technical scheme

In order to solve the technical problem, the utility model provides a technical scheme does:

the worm wheel type twin jack comprises a jack body, a worm, a driven shaft and a sliding sleeve, wherein the worm is connected with the jack body in a rotating mode, the lower end portion of the driven shaft is connected with the jack body in a rotating mode, a worm wheel meshed with the worm is arranged on the lower portion of the driven shaft, an external thread is arranged above the driven shaft, an internal thread matched with the external thread is arranged in the sliding sleeve, the sliding sleeve is in threaded connection with the driven shaft, a guide groove for the sliding sleeve to penetrate out is formed in the jack body, and a top plate is connected to the top of the sliding sleeve.

The driven shafts are two, namely a left driven shaft and a right driven shaft respectively, a left worm wheel is arranged on the lower portion of the left driven shaft, a right worm wheel is arranged on the lower portion of the right driven shaft, and the left worm wheel and the right worm wheel are meshed with the worm respectively and are located on the left side and the right side of the worm.

The sliding sleeves are two and are respectively a left sliding sleeve and a right sliding sleeve, the left sliding sleeve is in threaded connection with the left driven shaft, and the right sliding sleeve is in threaded connection with the right driven shaft.

Wherein, the part of the worm extending out of the jack body is connected with a rotating handle.

And the part of the worm extending out of the jack body is connected with an output shaft of the motor.

Wherein the lead angle of the worm is smaller than the equivalent friction angle between the meshing wheel teeth of the left worm wheel and the right worm wheel.

(III) advantageous effects

The technical scheme provided by the utility model, compared with prior art, following beneficial effect has:

the utility model adopts the double-screw mechanism to be fixedly connected with the top plate, the supporting structure is more stable, and the supporting amount is increased; the lead angle of the worm is smaller than the equivalent friction angle between the teeth of the meshing wheel, the mechanism has self-locking performance, reverse self-locking can be realized, namely, the worm wheel can only be driven by the worm, but not the worm wheel can drive the worm, and the safety protection effect can be realized. The worm-gear twin jack of the utility model has simple structure and low production cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other embodiments can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural view of a middle worm-gear twin jack of the present invention;

FIG. 2 is a schematic view of the internal structure of the middle worm-gear twin jack of the present invention;

in the figure, 1, a jack body, 2, a worm, 3, a left driven shaft, 4, a right driven shaft, 5, a left worm wheel, 6, a right worm wheel, 7, an external thread, 8, a left sliding sleeve, 9, a right sliding sleeve, 10, a left guide groove, 11, a right guide groove and 12, a top plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely below with reference to specific embodiments of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-2, the present embodiment provides a worm-gear type twin jack, which includes a jack body 1, a worm 2, a driven shaft and a sliding sleeve, wherein the worm 2 is rotatably connected to the jack body 1, a lower end portion of the driven shaft is rotatably connected to the jack body 1, a worm wheel meshed with the worm 2 is disposed at a lower portion of the driven shaft, an external thread 7 is disposed above the driven shaft, an internal thread matched with the external thread 7 is disposed in the sliding sleeve, the sliding sleeve is in threaded connection with the driven shaft, and the driven shaft and the sliding sleeve form a screw transmission mechanism. Be equipped with the confession on the jack body 1 the guide way that the sliding sleeve wore out, the stability of going up and down has been improved in the setting of guide way, and the top of sliding sleeve is connected with roof 12. During operation, the top plate 12 is abutted to the lower portion of a part to be jacked, the worm 2 rotates to drive the worm wheel to rotate, the worm wheel drives the driven shaft to rotate, and then the sliding shaft is driven to move upwards along the driven shaft, so that the lifting effect is achieved.

Wherein, for the stability that improves the mechanism, the driven shaft is two, is left driven shaft 3 and right driven shaft 4 respectively, and 3 lower parts of left driven shaft are equipped with

left worm wheel

5, and 4 lower parts of right driven shaft are equipped with right worm wheel 6, left worm wheel 5 with right worm wheel 6 meshes with worm 2 respectively mutually to be located the left and right sides of worm 2. The worm 2 drives the left worm wheel 5 and the right worm wheel 6 to rotate back to back simultaneously, and then drives the top plate 121 to move upwards through the sliding block, so that the object to be jacked is jacked up.

Wherein, the sliding sleeve is two, is left sliding sleeve 8 and right sliding sleeve 9 respectively, and left sliding

sleeve

8 and 3 threaded connection of left driven shaft, right sliding

sleeve

9 and 4 threaded connection of right driven shaft. The number of the guide grooves is also two, namely a left guide groove 10 and a right guide groove 11.

Wherein, the part of the worm extending out of the jack body 1 is connected with a rotating handle (not shown in the figure), or the part of the worm extending out of the jack body 1 is connected with an output shaft of a motor (not shown in the figure). I.e. the power part of the worm may be a handle or a motor.

Wherein, the lead angle of the worm is smaller than the equivalent friction angle between the meshing wheel teeth of the left worm wheel 5 and the right worm wheel 6. The mechanism has self-locking property, can realize reverse self-locking, namely, the worm wheel can be driven only by the worm, but the worm wheel cannot drive the worm, and can play a role in safety protection. When the object to be jacked is put down, the handle is rotated in the opposite direction or the motor is rotated reversely.

It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A worm gear type twin jack is characterized in that: including jack body, worm, driven shaft and sliding sleeve, the worm with the jack body rotates to be connected, the lower tip of driven shaft with the jack body rotates to be connected, the driven shaft lower part be equipped with worm engaged with worm wheel, the driven shaft top is equipped with the external screw thread, be equipped with the internal thread with external screw thread matched with in the sliding sleeve, the sliding sleeve with driven shaft threaded connection, be equipped with the confession on the jack body the guide way that the sliding sleeve wore out, the top of sliding sleeve is connected with the roof.

2. A worm-gear twin jack according to claim 1 wherein: the driven shaft is two, is left driven shaft and right driven shaft respectively, left side driven shaft lower part is equipped with left worm wheel, right side driven shaft lower part is equipped with right worm wheel, left side worm wheel with right worm wheel respectively with the worm meshes mutually, and is located the left and right sides of worm.

3. A worm-gear twin jack according to claim 2 wherein: the sliding sleeves are two and are respectively a left sliding sleeve and a right sliding sleeve, the left sliding sleeve is in threaded connection with the left driven shaft, and the right sliding sleeve is in threaded connection with the right driven shaft.

4. A worm-gear twin jack according to claim 1 wherein: the part of the worm extending out of the jack body is connected with a rotating handle.

5. A worm-gear twin jack according to claim 1 wherein: and the part of the worm extending out of the jack body is connected with an output shaft of the motor.

6. A worm-gear twin jack according to claim 2 wherein: the lead angle of the worm is smaller than the equivalent friction angle between the meshing wheel teeth of the left worm wheel and the right worm wheel.