Bidirectional screw jack

Abstract

The utility model belongs to the field of jacks, and discloses a bidirectional screw jack, which comprises a sleeve, two ends of the sleeve are respectively provided with nuts in opposite directions, and an upper screw and a lower screw are respectively inserted into the two nuts in a threaded manner; the top seat is fixed at the end part of the upper screw rod, and a slot is formed in the side wall of the top seat; the base is fixed at the end part of the lower screw rod; the control assembly is used for controlling the sleeve to rotate. Wherein the nut piece is a T-shaped double-end nut, the nut piece, the upper screw rod and the lower screw rod which are opposite in direction are arranged, so that when rotation of the upper screw rod and the lower screw rod is limited, the sleeve is controlled to rotate, the effects of double-multiplication distance extension and double-multiplication distance contraction can be achieved, and therefore the lifting speed is increased, and the effect of improving efficiency is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of jacks, and in particular relates to a bidirectional screw jack. Background Art

[0002] A jack is a lightweight lifting device that uses a rigid lifting member as a working mechanism to lift heavy objects within a short stroke of a top support or bottom claw. Jacks are primarily used in factories, mines, and transportation for vehicle repair and other lifting and supporting tasks. Commonly used jacks include screw jacks and hydraulic jacks.

[0003] The existing screw jack is used for unilateral lifting and lowering, and the friction force of the screw pair transmission during the lifting process is large, resulting in a slow lifting speed, that is, low efficiency, and is not suitable for occasions that require fast lifting.

[0004] Therefore need a kind of screw jack, to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a double screw jack to solve the problem of low efficiency of the existing screw jacks mentioned above.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions: a two-way screw jack, comprising

[0007] The sleeve has nuts at both ends with opposite directions, and the upper screw and the lower screw are respectively threadedly inserted into the two nuts;

[0008] A top seat is fixed to the end of the upper screw rod, and a slot is provided on the side wall of the top seat;

[0009] A base, fixed to the end of the lower screw;

[0010] The control component is used to control the rotation of the sleeve.

[0011] The principle and effect of this technical solution:

[0012] 1. By setting the nuts, upper screw and lower screw in opposite directions, and then restricting the rotation of the upper and lower screws, by controlling the rotation of the sleeve, the effect of double-length extension and double-length contraction can be achieved, thereby increasing the lifting speed and improving efficiency.

[0013] 2. The top seat and the base are respectively in contact with the ground and the object to be lifted. When the object to be lifted is not lifted, the device is placed under the object to be lifted. The top seat is controlled by inserting the rod into the slot to drive the upper screw to rotate relative to the sleeve. The upper screw can be extended alone at this time until the base is close to the ground. After the top seat is close to the object to be lifted, the sleeve can be controlled to rotate through the control component, thereby achieving a double extension effect. The setting of the slot makes it easy for the user to control the rotation of the top seat.

[0014] 3. The sleeve rotation is controlled by the control assembly, thereby saving manpower and making the jack easier to lift.

[0015] The utility model is further configured as follows: the control component includes a control hole, and the control hole is opened on the outer wall of the sleeve.

[0016] The principle and effect of this technical solution: by opening the control hole, the rotation of the sleeve can be achieved by inserting a rod into the control hole, thereby driving the control hole to rotate through the rod, thereby increasing the force arm and saving manpower.

[0017] The utility model is further configured as follows: a guide rod is provided in the sleeve, the inner sides of the upper screw rod and the lower screw rod are provided with a clearance groove, the two ends of the guide rod are respectively inserted into the two clearance grooves, and the guide rod is fixed to the base.

[0018] The principle and effect of this technical solution: The setting of the guide rod and the give way groove allows the upper screw and the lower screw to be restricted and guided by the guide rod when they are away from the sleeve, that is, when the matching size with the inner side of the sleeve is reduced, thereby improving the concentricity and stability between the upper screw, sleeve and lower screw.

[0019] The utility model is further configured as follows: the control component includes a worm gear, a fixed shell, a worm and a handle, the worm gear is fixed on the outer wall of the sleeve, the fixed shell cover is arranged outside the worm gear, and the fixed shell is rotatably sleeved on the sleeve, the worm is rotatably installed in the fixed shell, the worm is adapted to the worm gear, one end of the worm extends outside the fixed shell and is detachably connected to the handle.

[0020] The principle and effect of this technical solution: through the arrangement of the fixed shell, worm and worm wheel, the rotation of the worm can drive the rotation of the worm wheel, and the fixed shell is rotatably arranged on the sleeve, and the worm wheel is fixed on the sleeve, and then by limiting the rotation of the fixed shell and driving the worm to rotate by the handle, the sleeve can be indirectly driven to rotate, thereby controlling the position of the upper screw and the lower screw relative to the sleeve. The detachable connection of the handle allows the device to be disassembled during transportation to reduce space occupancy, making it easier to carry.

[0021] The utility model is further configured as follows: a hexagonal inner groove is provided on the handle, and the end portion of the worm is slidably inserted into the hexagonal inner groove.

[0022] The principle and effect of this technical solution: The setting of the hexagonal groove prevents the end of the worm from rotating relative to the handle after being inserted into the handle, so that the user can control the rotation of the worm by controlling the rotation of the handle, and the handle is detachable relative to the worm, which facilitates the carrying and transportation of the jack.

[0023] The utility model is further configured as follows: the control component further comprises a stop ring and a stop rod, the stop ring is fixed on the outer wall of the fixed shell, and the stop rod is slidably inserted into the stop ring.

[0024] The principle and effect of this technical solution: through the setting of the stop ring and the stop rod, the user can easily limit the rotation of the fixed shell by controlling the position of the stop rod, thereby making it more convenient for the handle to control the worm to drive the worm wheel to rotate to tend to rotate the sleeve, and the setting of the sliding insertion of the stop rod makes the stop rod and the stop ring detachable, which is convenient for carrying, transportation and installation and positioning.

[0025] The utility model is further configured as follows: a pedal is installed at the bottom of the anti-rotation rod.

[0026] The principle and effect of this technical solution: The setting of the pedal eliminates the need for the user to manually control the anti-rotation rod. When using the device, the anti-rotation rod can be kept in a stable position by stepping on the pedal, thereby facilitating operation and use.

[0027] The utility model is further configured as follows: two anti-rotation rings are symmetrically arranged on the fixed shell, the anti-rotation rod is inserted into the pedal, the cross-section of the pedal is annular, the base is located inside the pedal, the side wall of the base is installed with a positioning ring, and a corresponding positioning hole is opened on the pedal.

[0028] The principle and effect of this technical solution: by symmetrically arranging the anti-rotation ring, the fixed shell has more anti-rotation points, thereby achieving a better anti-rotation effect, and by arranging the positioning ring and the positioning hole, when the positioning ring corresponds to the positioning hole, the base and the pedal can be connected into a whole by pin positioning, so that the friction force of the base can be used to limit the rotation of the pedal, thereby limiting the rotation of the anti-rotation rod and the fixed shell, thereby making the control component more convenient to use, and the anti-rotation rod plug-in setting makes it possible to use it separately according to actual conditions when the anti-rotation rod is inconvenient to install, which is more flexible and convenient to use.

[0029] The utility model is further configured as follows: the nut piece is a T-shaped double-headed nut.

[0030] The principle and effect of this technical solution: the setting of the double-headed nut has a better locking effect, has the ability of two-way locking, and the T-type screw thread has a larger expansion and contraction amount when rotating, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the main view of the utility model;

[0032] Figure 2 This is an axial structural diagram of the first embodiment of the present utility model;

[0033] Figure 3 This is an axial structural diagram of the second embodiment of the present utility model;

[0034] Figure 4 for Figure 3 Top view of the structure at the middle worm gear;

[0035] Figure 5 This is an axial structural diagram of the third embodiment of the present utility model;

[0036] Figure 6 for Figure 5 Structural diagram of the middle pedal. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0038] The reference numerals in the drawings of the specification include:

[0039] 101. Sleeve; 102. Control hole; 103. Nut;

[0040] 201, upper screw; 202, top seat; 203, slot;

[0041] 301, lower screw; 302, base; 303, positioning ring;

[0042] 401, guide rod; 402, clearance groove;

[0043] 501, worm gear; 502, fixed housing; 503, worm; 504, handle; 505, anti-rotation ring; 506, anti-rotation rod; 507, pedal; 508, positioning hole.

[0044] As attached Figure 1 As shown, the utility model discloses a bidirectional screw jack, including a sleeve 101, a top seat 202, a base 302 and a control assembly. Nuts 103 with opposite directions are respectively provided at both ends of the sleeve 101 (nuts with opposite spiral directions can be welded, as shown in the attached Figure 1 As shown), the upper screw 201 and the lower screw 301 are respectively threadedly inserted into the two nut members 103. By limiting the rotation of the upper screw 201 and the lower screw 301, the driving sleeve 101 can be rotated to synchronously control the upper screw 201 and the lower screw 301 to move away from or closer to each other, thereby achieving a double extension or storage effect and improving efficiency.

[0045] Among them, the nut 103 is a T-shaped double-headed nut. Viewed in the vertical direction, the thread of the upper screw 201 is a T-shaped large-pitch double-headed left-hand thread, and the thread of the lower screw 301 is a T-shaped large-pitch double-headed right-hand thread. The tooth pitch of the upper screw 201 and the lower screw 301 are both greater than 8 cm.

[0046] The top seat 202 is fixed to the end of the upper screw 201. A slot 203 is formed in the side wall of the top seat 202. The base 302 is fixed to the end of the lower screw 301. The control assembly is used to control the rotation of the sleeve 101. The slot 203 is provided so that when the device is placed under the object to be lifted (such as a vehicle), the base 302 contacts the ground and the top seat 202 does not contact the object to be lifted. By restricting the rotation of the sleeve 101, a rod is inserted into the slot 203 to drive the top seat 202 to rotate. Once the object to be lifted is firmly against the top seat 202, the independent control of the top seat 202 can be canceled. At this time, since the top seat 202 contacts the object to be lifted, the base 302 also contacts the ground. As a result, due to the influence of friction, the upper screw 201 and the lower screw 301 will not rotate. Therefore, the user only needs to control the control assembly to drive the sleeve 101 to rotate to achieve the extension function, which is efficient and easy to use.

[0047] A guide rod 401 is disposed within the sleeve 101. The inner sides of both the upper and lower screw rods 201 and 301 have clearance grooves 402, with the ends of the guide rod 401 secured within the two clearance grooves 402. The provision of the guide rod 401 ensures concentricity between the upper and lower screw rods 201 and 301, and the sleeve 101, improving stability and reliability. The guide rod 401 itself is rotatable (i.e., the movable and fixed ends can rotate relative to each other).

[0048] Example 1, as shown in the attached Figure 1 、 2 As shown, the control component includes a control hole 102, which is opened on the outer wall of the sleeve 101. Through the opening of the control hole 102, the top seat 202 and the base 302 are pressed against the upper and lower contact surfaces. The rotation of the sleeve 101 can be controlled by inserting a rod into the control hole 102. The rotation is driven by the rod inserted into the control hole 102, which extends the control force arm, saves manpower, and makes the rotation more convenient and quick.

[0049] Example 2, as shown in the attached Figure 1 、 3As shown in Figure 4, the control assembly includes a worm gear 501, a fixed housing 502, a worm 503, and a handle 504. The worm gear 501 is fixed to the outer wall of the sleeve 101. The fixed housing 502 is mounted outside the worm gear 501 and rotatably sleeved on the sleeve 101. The worm 503 is rotatably mounted within the fixed housing 502. The worm 503 is adapted to fit the worm gear 501. One end of the worm 503 extends outside the fixed housing 502 and is detachably connected to the handle 504. The handle 504 has a hexagonal inner groove, into which the end of the worm 503 slides. The control assembly also includes a stop ring 505 fixed to the outer wall of the fixed housing 502 and a stop rod 506 that slides within the stop ring 505. A pedal 507 is mounted at the bottom of the stop rod 506.

[0050] Through the setting of the control component, the rotation of the sleeve 101 can be controlled by limiting the rotation of the fixed shell 502 and driving the handle 504 to rotate at the same time, so that the control component can maintain its position while the sleeve 101 rotates accordingly, thereby facilitating the staff to continuously control the control component, and through the setting of the stop ring 505, the stop rod 506 and the pedal 507, the staff can limit the rotation of the fixed shell 502 by stepping on it during operation. It is simple and convenient to use and easy to disassemble and assemble. The setting of the handle 504 and the hexagonal groove of the worm gear 503 allows the handle 504 to be adjusted in position through frequent disassembly and assembly to avoid the influence of special angle positions interfering with the user's rotation of the handle 504.

[0051] Example 3, as Figure 1 、 5 As shown in Figure 6, on the basis of the second embodiment, two anti-rotation rings 505 are symmetrically provided on the fixed shell 502, and the anti-rotation rod 506 is inserted into the pedal 507. The cross-section of the pedal 507 is annular (a square ring is used as an example in this embodiment and the accompanying drawings, but it is not limited to a square ring, and it can also be a circular ring, etc. The cross-sectional shape of the base 302 is set synchronously following the cross-sectional shape of the pedal 507, that is, if the pedal 507 is a circular ring, then the base 302 is circular), the base 302 is located in the pedal 507, and a positioning ring 303 is installed on the side wall of the base 302. A corresponding positioning hole 508 is opened on the pedal 507. When the positions of the positioning hole 508 and the positioning ring 303 correspond, they can be connected and limited by inserting a pin (a detachable limiting part such as a pin).

[0052] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions or features in the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A bidirectional screw jack, characterized in that: include The sleeve has nut pieces at both ends with opposite directions, and the upper screw and the lower screw are respectively threadedly inserted in the two nut pieces; A top seat is fixed to the end of the upper screw, and a slot is formed on the side wall of the top seat; A base, fixed to the end of the lower screw; A control component is used to control the rotation of the sleeve.

2. A bidirectional screw jack according to claim 1, characterized in that: The control component includes a control hole, which is opened on the outer wall of the sleeve.

3. A bidirectional screw jack according to claim 1, characterized in that: A guide rod is provided in the sleeve, and the inner sides of the upper screw rod and the lower screw rod are provided with a clearance groove, and the two ends of the guide rod are respectively inserted into the two clearance grooves, and the guide rod is fixed to the base.

4. A bidirectional screw jack according to claim 1, characterized in that: The control assembly includes a worm wheel, a fixed shell, a worm and a handle. The worm wheel is fixed to the outer wall of the sleeve. The fixed shell is covered outside the worm wheel, and the fixed shell is rotatably sleeved on the sleeve. The worm is rotatably installed in the fixed shell. The worm is adapted to the worm wheel, and one end of the worm extends outside the fixed shell and is detachably connected to the handle.

5. A bidirectional screw jack according to claim 4, characterized in that: The handle is provided with an inner hexagonal groove, and the end portion of the worm is slidably inserted into the inner hexagonal groove.

6. A bidirectional screw jack according to claim 4, characterized in that: The control assembly further comprises a stop ring and a stop rod, wherein the stop ring is fixed on the outer wall of the fixed shell, and the stop rod is slidably inserted into the stop ring.

7. A bidirectional screw jack according to claim 6, characterized in that: A pedal is installed at the bottom of the anti-rotation rod.

8. A bidirectional screw jack according to claim 7, characterized in that: Two anti-rotation rings are symmetrically arranged on the fixed shell, the anti-rotation rod is inserted into the pedal, the cross section of the pedal is annular, the base is located inside the pedal, the side wall of the base is installed with a positioning ring, and a corresponding positioning hole is opened on the pedal.

9. The bidirectional screw jack according to claim 1, characterized in that: The nut piece is a T-shaped double-headed nut.

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