CN110775857B - Mechanical jack - Google Patents
Mechanical jack Download PDFInfo
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- CN110775857B CN110775857B CN201910955131.8A CN201910955131A CN110775857B CN 110775857 B CN110775857 B CN 110775857B CN 201910955131 A CN201910955131 A CN 201910955131A CN 110775857 B CN110775857 B CN 110775857B
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- bevel gear
- shaft
- way clutch
- box body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
- B66F3/16—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated actuated through bevel-wheel gearings
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Abstract
The invention discloses a mechanical jack, which comprises a base, a transmission assembly and a jacking assembly, wherein the transmission assembly is arranged on the base, the jacking assembly is arranged on the base, the transmission assembly comprises a box body, an input shaft, a handle, a first bevel gear, a second bevel gear, a third bevel gear, an output shaft, a fourth bevel gear and a fifth bevel gear, and the jacking assembly comprises a telescopic pipe and a telescopic shaft; the invention has the advantages that no matter the handle moves upwards or downwards, the output shaft rotates according to the set direction, the telescopic pipe uninterruptedly extends or contracts, each operation action is fully utilized, and the working efficiency is greatly improved.
Description
Technical Field
The invention belongs to the technical field of hydraulic lifting tools, and particularly relates to a mechanical jack.
Background
The jack is a hoisting tool, which can lift heavy objects to a specified height through the top, and is mainly used for the departments of factories, mines, transportation and the like as vehicle repair and other hoisting, supporting and other works. The common jacks include a mechanical jack and an oil jack, the mechanical jack lifts a heavy object by means of threads, and the common jacks are characterized by simple structure and heavy support. The problem that exists is that the handle just lifts the heavy object when reciprocating up-and-down moving in-process, only handle downward action, and does not lift the heavy object when the handle upward action, and this kind of intermittent type nature lifts the mode and makes work efficiency low, lifts slowly, and is hard and time-consuming.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a mechanical jack.
The technical scheme adopted by the invention is as follows: a mechanical jack comprises a base, a transmission component arranged on the base and a jacking component arranged on the base;
the transmission assembly is used for driving a telescopic shaft in the jacking assembly to rotate and comprises a box body, an input shaft, a handle, a first bevel gear, a second bevel gear, a third bevel gear, an output shaft, a fourth bevel gear and a fifth bevel gear; the box body is arranged on the base, a left mounting hole is formed in the left end of the box body, a right mounting hole is formed in the right end of the box body, the left mounting hole and the right mounting hole are located on the same axis, and a first bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear and a fifth bevel gear mounting cavity are formed in the box body; the input shaft is transversely and rotatably arranged on the left mounting hole of the box body, the left end of the input shaft is exposed out of the box body, and the right end of the input shaft extends into the box body; the handle is used for providing a power source for the input shaft, is fixed at the left end of the input shaft and drives the input shaft to rotate forward and backward by moving the handle up and down in a reciprocating manner; the first bevel gear is an annular bevel gear, teeth are arranged on the annular inner ring surface, and the first bevel gear is arranged at the right end of the input shaft; the second bevel gear is an annular bevel gear, teeth are arranged on the annular inner ring surface, and the second bevel gear is arranged on the right side of the first bevel gear and is coaxially and symmetrically spaced with the first bevel gear; the third bevel gear is arranged between the first bevel gear and the second bevel gear and is meshed with the first bevel gear and the second bevel gear, the third bevel gear transmits the rotation of the first bevel gear to the second bevel gear, the rotation direction of the second bevel gear is opposite to that of the first bevel gear, and the third bevel gear is connected to the box body or the base through a rotating shaft; the output shaft is arranged in the box body, the output shaft and the input shaft are on the same axis, the right end of the output shaft is rotatably arranged on a right mounting hole of the box body and is exposed out of the box body, a shaft body of the output shaft is positioned in the annular inner rings of the first bevel gear and the second bevel gear, and the output shaft comprises a shaft sleeve, a one-way clutch block and a reversing shaft; the shaft sleeve is of a hollow structure, two unidirectional clutch block accommodating grooves are formed in the shaft body of the shaft sleeve and are communicated with the shaft sleeve in a hollow mode, the positions of the two accommodating grooves correspond to the annular inner ring teeth of the first bevel gear and the second bevel gear, and shaft holes for installing the unidirectional clutch blocks are formed in the two accommodating grooves; the one-way clutch block is used for realizing one-way clutch between the first bevel gear and the shaft sleeve and between the second bevel gear and the shaft sleeve, the number of the one-way clutch blocks is two, the two one-way clutch blocks are respectively and rotatably arranged in two arrangement grooves on the shaft sleeve, the one-way clutch block is fan-shaped, two ends of the outer periphery of the one-way clutch block are provided with teeth, the teeth are matched with teeth of annular inner rings of the first bevel gear and the second bevel gear, the inner periphery of the one-way clutch block is provided with two circular arc notches, the middle position of the one-way clutch block is provided with a pin hole, and the one-way clutch block is rotatably arranged on the arrangement grooves through; the reversing shaft is used for setting the rotating direction of the output shaft, the reversing shaft is rotatably arranged in the hollow of the shaft sleeve, the right end of the reversing shaft is exposed out of the shaft sleeve and is provided with a regulating button, the shaft core can rotate in the shaft sleeve by rotating the regulating button, the shaft body of the reversing shaft is provided with two blind holes, the positions of the two blind holes correspond to the positions of the two placing grooves, a spring is arranged in each blind hole, the top end of the spring is provided with a round ball, and the round ball is matched with an arc notch on the one-way; the fourth bevel gear is arranged on the output shaft and is positioned on the right side of the second bevel gear; the fifth bevel gear is rotationally arranged on the base, teeth are arranged on the peripheral surface of the fifth bevel gear, the teeth on the surface of the bevel gear are meshed with the fourth bevel gear, and the teeth on the peripheral surface are meshed with a driven gear in the jacking assembly;
the jacking assembly is used for jacking a heavy object and comprises a telescopic pipe and a telescopic shaft; the telescopic pipe comprises a first section pipe, a second section pipe and a third section pipe, wherein the second section pipe can stretch and slide in the first section pipe, the third section pipe can stretch and slide in the second section pipe, the cross section of each section pipe is in a regular polygon shape, so that each section pipe can only stretch and slide relatively but cannot rotate relatively, the bottom end of the first section pipe is fixed on the base, the bottom end of the second section pipe is provided with a first sealing plate, the center of the first sealing plate is provided with a first round hole, the bottom end of the third section pipe is provided with a second sealing plate, the center of the second sealing plate is provided with a second round hole, the inner diameter of the second round hole is larger than that of the first round hole, the inner wall of the first round hole is provided with a first internal thread, and the inner wall of the second round hole is provided with a second internal thread; the telescopic shaft is arranged in the telescopic pipe and drives the telescopic pipe to stretch and retract through rotation, the telescopic shaft comprises a first joint shaft and a second joint shaft, the appearance of each joint shaft is cylindrical, the cross section of the second joint shaft is larger than that of the first joint shaft, the second joint shaft is of a hollow structure, the hollow cross section is of a regular polygon, a first external thread is arranged on the shaft body of the first joint shaft and matched with the first internal thread, a second external thread is arranged on the shaft body of the second joint shaft and matched with the second internal thread, a prism body matched with the hollow part of the second joint shaft is arranged at the top end of the first joint shaft, the prism body can telescopically slide in the hollow part of the second joint shaft but cannot relatively rotate, so that the first joint shaft can drive the second joint shaft to rotate together through the prism body, a driven gear is arranged at the bottom end of the first joint shaft and is meshed with teeth on the outer peripheral surface of a fifth bevel gear, the bottom end of the second joint shaft is rotatably connected with the first sealing plate.
Furthermore, the number of the third bevel gears is two, and the two third bevel gears are oppositely arranged and are respectively meshed with the first bevel gear and the second bevel gear.
Further, according to the same principle and according to the actual situation, the number of the telescopic pipes can be larger than three sections, and the number of the telescopic shafts can be larger than two sections.
Furthermore, the cross section of each section of the telescopic pipe is in a regular hexagon, the hollow cross section of the second section shaft is in a regular hexagon, and the prism is a hexagonal prism.
The working process of the invention is as follows: when the heavy object is lifted, the adjusting button is adjusted to be in a first working state, so that the ball is supported on the first arc-shaped notch (one of the two arc-shaped notches is arbitrarily assumed to be the first arc-shaped notch, and the other one is the second arc-shaped notch), and the one-way clutch block is assumed to be positively meshed with the first bevel gear and the second bevel gear and not meshed with the first bevel gear and the second bevel gear at the moment (the reverse assumption is also applicable). When the handle moves downwards, the input shaft rotates in the forward direction, the input shaft drives the first bevel gear to rotate in the forward direction, the first bevel gear drives the third bevel gear to rotate, the third bevel gear drives the second bevel gear to rotate in the reverse direction, the one-way clutch block is meshed with the first bevel gear and not meshed with the second bevel gear at the moment, and the one-way clutch block drives the output shaft to rotate in the forward direction; when the handle moves upwards, the input shaft rotates reversely, the input shaft drives the first bevel gear to rotate reversely, the first bevel gear drives the third bevel gear to rotate, the third bevel gear drives the second bevel gear to rotate positively, at the moment, the one-way clutch block is not meshed with the first bevel gear and is meshed with the second bevel gear, and the one-way clutch block drives the output shaft to rotate positively. The output shaft rotates in the forward direction whether the handle is moved downward or upward. The output shaft drives the fourth bevel gear to rotate positively, the fourth bevel gear drives the fifth bevel gear to rotate, the fifth bevel gear drives the driven gear to rotate positively, the driven gear drives the first pitch shaft to rotate positively, a first external thread of the first pitch shaft is matched with a first internal thread on the first sealing plate to drive the second pitch pipe to extend upwards, and the second pitch pipe drives the second pitch shaft to extend upwards together; meanwhile, the prism on the first joint shaft drives the second joint shaft to rotate in the positive direction, and the second external threads of the second joint shaft are matched with the second internal threads on the second sealing plate to drive the third joint pipe to extend upwards.
After the heavy object is lifted, the adjusting button is adjusted to be in a second working state, the ball is supported on the second arc-shaped notch, and at the moment, the one-way clutch block is meshed with the first bevel gear and the second bevel gear in a reverse direction and is not meshed with the first bevel gear and the second bevel gear in a forward direction. When the handle moves downwards, the input shaft rotates in the positive direction, the input shaft drives the first bevel gear to rotate in the positive direction, the first bevel gear drives the third bevel gear to rotate, the third bevel gear drives the second bevel gear to rotate in the reverse direction, the one-way clutch block is not meshed with the first bevel gear and is meshed with the second bevel gear at the moment, and the one-way clutch block drives the output shaft to rotate in the reverse direction; when the handle moves upwards, the input shaft rotates reversely, the input shaft drives the first bevel gear to rotate reversely, the first bevel gear drives the third bevel gear to rotate, the third bevel gear drives the second bevel gear to rotate positively, at the moment, the one-way clutch block is meshed with the first bevel gear and not meshed with the second bevel gear, and the one-way clutch block drives the output shaft to rotate reversely. The output shaft rotates in the opposite direction whether the handle is moved downward or upward. The output shaft drives the fourth bevel gear to rotate reversely, the fourth bevel gear drives the fifth bevel gear to rotate, the fifth bevel gear drives the driven gear to rotate reversely, the driven gear drives the first pitch shaft to rotate reversely, a first external thread of the first pitch shaft is matched with a first internal thread on the first sealing plate to drive the second pitch pipe to contract downwards, and the second pitch pipe drives the second pitch shaft to contract downwards together; meanwhile, the prism on the first joint shaft drives the second joint shaft to rotate reversely, and the second external threads of the second joint shaft are matched with the second internal threads on the second sealing plate to drive the third joint pipe to shrink downwards.
The invention has the beneficial effects that: no matter the handle moves upwards or downwards, the output shaft rotates according to the set direction, the telescopic pipe stretches out or contracts uninterruptedly, each operation action is fully utilized, and the working efficiency is greatly improved.
Drawings
Fig. 1 is a schematic diagram of the external structure of the present invention.
Fig. 2 is a schematic diagram of the internal structure of the present invention.
Fig. 3 is an exploded view of the transmission assembly of the present invention.
Fig. 4 is an exploded view of the output shaft of the present invention.
FIG. 5 is a schematic view of the one-way clutch block structure of the invention.
Fig. 6 is a cross-sectional view of the transmission assembly of the present invention.
Fig. 7 is another cross-sectional view of the transmission assembly of the present invention.
Fig. 8 is a schematic view of the telescopic tube structure of the present invention.
Fig. 9 is a schematic structural view of the telescopic shaft of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 and 2, a mechanical jack comprises a base 1, a transmission assembly 2 arranged on the base 1, and a lifting assembly 3 arranged on the base 1;
as shown in fig. 1 to 7, the transmission assembly 2 is used for driving a telescopic shaft in the jacking assembly 3 to rotate, and the transmission assembly 2 comprises a box 4, an input shaft 5, a handle 6, a first bevel gear 7, a second bevel gear 8, a third bevel gear 9, an output shaft 10, a fourth bevel gear 11 and a fifth bevel gear 12; the box body 4 is arranged on the base 1, the left end of the box body 4 is provided with a left mounting hole, the right end of the box body 4 is provided with a right mounting hole, the left mounting hole and the right mounting hole are on the same axis, and a first bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear and a fifth bevel gear mounting cavity are arranged in the box body 4; the input shaft 5 is transversely and rotatably arranged on a left mounting hole of the box body 4, the left end of the input shaft 5 is exposed out of the box body 4, and the right end of the input shaft 5 extends into the box body 4; the handle 6 is used for providing a power source for the input shaft 5, the handle 6 is fixed at the left end of the input shaft 5, and the handle 6 is moved up and down in a reciprocating manner to drive the input shaft to rotate forwards and reversely; the first bevel gear 7 is an annular bevel gear, teeth 23 are arranged on an annular inner ring surface, and the first bevel gear 7 is arranged at the right end of the input shaft 5; the second bevel gear 8 is an annular bevel gear, teeth 23 are arranged on an annular inner ring surface, and the second bevel gear 8 is arranged on the right side of the first bevel gear 7 and is coaxially and symmetrically spaced from the first bevel gear 7; the third bevel gear 9 is arranged between the first bevel gear 7 and the second bevel gear 8 and is meshed with the first bevel gear 7 and the second bevel gear 8, the third bevel gear 9 transmits the rotation of the first bevel gear 7 to the second bevel gear 8, the second bevel gear 8 and the first bevel gear 7 rotate in opposite directions, and the third bevel gear 9 is connected to the box body 4 or the base 1 through a rotating shaft 24; the output shaft 10 is arranged in the box body 4, the output shaft 10 and the input shaft 5 are on the same axis, the right end of the output shaft 10 is rotatably arranged on a right mounting hole of the box body 4 and is exposed out of the box body 4, the shaft body of the output shaft 10 is positioned in the annular inner rings of the first bevel gear 7 and the second bevel gear 8, and the output shaft 10 comprises a shaft sleeve 25, a one-way clutch block 26 and a reversing shaft 27; the shaft sleeve 25 is of a hollow structure, two one-way clutch block accommodating grooves 29 are formed in the shaft body of the shaft sleeve 25, the two accommodating grooves 29 are communicated with the shaft sleeve 25 in a hollow mode, the positions of the two accommodating grooves 29 correspond to the annular inner ring teeth 23 of the first bevel gear 7 and the second bevel gear 8, and shaft holes 30 for installing the one-way clutch blocks are formed in the two accommodating grooves 29; the one-way clutch blocks 26 are used for realizing one-way clutch between the first bevel gear 7, the second bevel gear 8 and the shaft sleeve 25, the number of the one-way clutch blocks 26 is two, the two one-way clutch blocks 26 are respectively and rotatably arranged in the two arrangement grooves 29 on the shaft sleeve 25, the one-way clutch blocks 26 are fan-shaped, teeth 37 are arranged at two ends of the outer periphery of the one-way clutch blocks 26, the teeth 37 are matched with the teeth 23 of the annular inner rings of the first bevel gear 7 and the second bevel gear 8, two circular arc notches 38 are arranged on the inner periphery of the one-way clutch blocks 26, pin holes 39 are arranged in the middle positions of the one-way clutch blocks 26, and the one-way clutch blocks 26 are rotatably arranged on the arrangement grooves 29 through the pin holes 39 and the shaft; the reversing shaft 27 is used for setting the rotating direction of the output shaft 10, the reversing shaft 27 is rotatably arranged in the hollow of the shaft sleeve 25, the right end of the reversing shaft 27 is exposed out of the shaft sleeve 25 and is provided with an adjusting button 34, the reversing shaft 27 can rotate in the shaft sleeve 25 by rotating the adjusting button 34, the shaft body of the reversing shaft 27 is provided with two blind holes 32, the positions of the two blind holes 32 correspond to the positions of the two placing grooves 29, a spring 35 is arranged in each blind hole 32, the top end of each spring 35 is provided with a round ball 36, and each round ball 36 is matched with an arc notch on the one-way clutch block 26; the fourth bevel gear 11 is arranged on the output shaft 10 and positioned at the right side of the second bevel gear 8; the fifth bevel gear 12 is rotatably arranged on the base 1, teeth 28 are arranged on the outer peripheral surface of the fifth bevel gear 12, wherein the teeth on the bevel surface are meshed with the fourth bevel gear 11, and the teeth 28 on the outer peripheral surface are meshed with the driven gear 13 in the jacking component 3;
as shown in fig. 1, 2, 8 and 9, the jacking assembly 3 is used for jacking heavy objects, and the jacking assembly 3 comprises a telescopic pipe 17 and a telescopic shaft 33; the extension tube 17 comprises a first tube section 14, a second tube section 15 and a third tube section 16, wherein the second tube section 15 can stretch and slide in the first tube section 14, the third tube section 16 can stretch and slide in the second tube section 15, the cross section of each tube section is in a regular polygon shape, so that each tube section can only stretch and slide relatively but cannot rotate relatively, the bottom end of the first tube section 14 is fixed on the base 1, the bottom end of the second tube section 15 is provided with a first sealing plate 18, the center of the first sealing plate 18 is provided with a first round hole 40, the bottom end of the third tube section 16 is provided with a second sealing plate 19, the center of the second sealing plate 19 is provided with a second round hole 42, the inner diameter of the second round hole 42 is larger than that of the first round hole 40, the inner wall of the first round hole 40 is provided with a first internal thread 41, and the inner wall of the second round hole 42 is provided with a second internal thread 43; the telescopic shaft 33 is arranged in the telescopic pipe 17, the telescopic shaft 33 drives the telescopic pipe 17 to extend and retract through rotation, the telescopic shaft 33 comprises a first joint shaft 20 and a second joint shaft 21, the appearance of each joint shaft is cylindrical, the cross section of the second joint shaft 21 is larger than that of the first joint shaft 20, the second joint shaft 21 is of a hollow structure, the cross section of a hollow 46 is a regular polygon, a first external thread 44 is arranged on the shaft body of the first joint shaft 20, the first external thread 44 is matched with the first internal thread 41, a second external thread 45 is arranged on the shaft body of the second joint shaft 21, the second external thread 45 is matched with a second internal thread 43, a prismatic body 22 matched with the hollow 46 of the second joint shaft 21 is arranged at the top end of the first joint shaft 20, the prismatic body 22 can stretch and slide in the hollow 46 of the second joint shaft 21 but cannot rotate relatively, so that the first joint shaft 20 can drive the second joint shaft 21 to rotate together through the prismatic body 22, a driven gear 13 is arranged at the bottom end of the first joint shaft 20, the driven gear 13 is engaged with teeth 28 on the outer peripheral surface of the fifth bevel gear 12, and the bottom end of the second joint shaft 21 is rotatably connected to the first seal plate 18.
Further, there are two third bevel gears 9, and the two third bevel gears 9 are oppositely disposed and engaged with the first bevel gear 7 and the second bevel gear 8, respectively.
Further, according to the same principle, according to the actual situation, the number of the telescopic pipes 17 can be more than three, and the number of the telescopic shafts 33 can be more than two.
Further, the cross section of each section of the extension tube 17 is regular hexagon, the cross section of the hollow 46 of the second section shaft 21 is regular hexagon, and the prism 22 is hexagonal prism.
The working process of the invention is as follows: when the heavy object is lifted, the knob 34 is adjusted to a first working state, so that the ball 36 is pressed against the first arc-shaped notch 38 (one of the two arc-shaped notches is arbitrarily assumed to be the first arc-shaped notch, and the other is the second arc-shaped notch), and the one-way clutch block 26 is assumed to be positively engaged with the first bevel gear 7 and the second bevel gear 8 and is not engaged with the first bevel gear in the reverse direction (the reverse assumption is also applicable). When the handle 6 moves downwards, the input shaft 5 rotates in the forward direction, the input shaft 5 drives the first bevel gear 7 to rotate in the forward direction, the first bevel gear 7 drives the third bevel gear 9 to rotate, the third bevel gear 9 drives the second bevel gear 8 to rotate in the reverse direction, at the moment, the one-way clutch block 26 is meshed with the first bevel gear 7 and is not meshed with the second bevel gear 8, and the one-way clutch block 26 drives the output shaft 10 to rotate in the forward direction; when the handle 6 moves upwards, the input shaft 5 rotates reversely, the input shaft 5 drives the first bevel gear 7 to rotate reversely, the first bevel gear 7 drives the third bevel gear 9 to rotate, the third bevel gear 9 drives the second bevel gear 8 to rotate forward, at the moment, the one-way clutch block 26 is not meshed with the first bevel gear 7 and is meshed with the second bevel gear 8, and the one-way clutch block 26 drives the output shaft 10 to rotate forward. The output shaft 10 rotates in the forward direction regardless of whether the handle 6 moves downward or upward. The output shaft 10 drives the fourth bevel gear 11 to rotate forward, the fourth bevel gear 11 drives the fifth bevel gear 12 to rotate, the fifth bevel gear 12 drives the driven gear 13 to rotate forward, the driven gear 13 drives the first pitch shaft 20 to rotate forward, the first external thread 44 of the first pitch shaft 20 is matched with the first internal thread 41 on the first sealing plate 18 to drive the second pitch pipe 15 to extend upwards, and the second pitch pipe 15 drives the second pitch shaft 21 to extend upwards together; meanwhile, the prism 22 on the first joint shaft 20 drives the second joint shaft 21 to rotate in the forward direction, and the second external thread 45 of the second joint shaft 21 cooperates with the second internal thread 43 on the second closing plate 19 to drive the third joint pipe 16 to extend upwards.
After the heavy object is lifted, the adjusting button 34 is adjusted to the second working state, so that the round ball 36 is supported against the second arc-shaped notch 38, and at the moment, the one-way clutch block 26 is meshed with the first bevel gear 7 and the second bevel gear 8 in the reverse direction and is not meshed with the first bevel gear 8 in the forward direction. When the handle 6 moves downwards, the input shaft 5 rotates forwards, the input shaft 5 drives the first bevel gear 7 to rotate forwards, the first bevel gear 7 drives the third bevel gear 9 to rotate, the third bevel gear 9 drives the second bevel gear 8 to rotate reversely, at the moment, the one-way clutch block 26 is not meshed with the first bevel gear 7 and is meshed with the second bevel gear 8, and the one-way clutch block 26 drives the output shaft 10 to rotate reversely; when the handle 6 moves upwards, the input shaft 5 rotates reversely, the input shaft 5 drives the first bevel gear 7 to rotate reversely, the first bevel gear 7 drives the third bevel gear 9 to rotate, the third bevel gear 9 drives the second bevel gear 8 to rotate forwardly, at the moment, the one-way clutch block 26 is meshed with the first bevel gear 7 and is not meshed with the second bevel gear 8, and the one-way clutch block 26 drives the output shaft 10 to rotate reversely. The output shaft 10 is rotated in the reverse direction regardless of whether the handle 6 is moved downward or upward. The output shaft 10 drives the fourth bevel gear 11 to rotate reversely, the fourth bevel gear 11 drives the fifth bevel gear 12 to rotate, the fifth bevel gear 12 drives the driven gear 13 to rotate reversely, the driven gear 13 drives the first pitch shaft 20 to rotate reversely, the first external thread 44 of the first pitch shaft 20 is matched with the first internal thread 41 on the first sealing plate 18 to drive the second pitch pipe 15 to shrink downwards, and the second pitch pipe 15 drives the second pitch shaft 21 to shrink downwards together; meanwhile, the prism 22 on the first joint shaft 20 drives the second joint shaft 21 to rotate reversely, and the second external thread 45 of the second joint shaft 21 cooperates with the second internal thread 43 on the second closing plate 19 to drive the third joint pipe 16 to contract downwards.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are usually placed when the products of the present invention are used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, the present invention should not be construed as being limited. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and therefore should not be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A mechanical jack comprises a base, a transmission component arranged on the base and a jacking component arranged on the base; the jacking assembly is used for jacking a heavy object and comprises a telescopic pipe and a telescopic shaft; the telescopic pipe comprises a first section pipe, a second section pipe and a third section pipe, wherein the second section pipe can stretch and slide in the first section pipe, the third section pipe can stretch and slide in the second section pipe, the cross section of each section pipe is in a regular polygon shape, so that each section pipe can only stretch and slide relatively but cannot rotate relatively, the bottom end of the first section pipe is fixed on the base, the bottom end of the second section pipe is provided with a first sealing plate, the center of the first sealing plate is provided with a first round hole, the bottom end of the third section pipe is provided with a second sealing plate, the center of the second sealing plate is provided with a second round hole, the inner diameter of the second round hole is larger than that of the first round hole, the inner wall of the first round hole is provided with a first internal thread, and the inner wall of the second round hole is provided with a second internal thread; the telescopic shaft is arranged in the telescopic pipe and drives the telescopic pipe to stretch and retract through rotation, the telescopic shaft comprises a first joint shaft and a second joint shaft, the appearance of each joint shaft is cylindrical, the cross section of the second joint shaft is larger than that of the first joint shaft, the second joint shaft is of a hollow structure, the hollow cross section is of a regular polygon shape, a first external thread is arranged on the shaft body of the first joint shaft and matched with the first internal thread, a second external thread is arranged on the shaft body of the second joint shaft and matched with the second internal thread, a prism body matched with the hollow part of the second joint shaft is arranged at the top end of the first joint shaft, the prism body can telescopically slide in the hollow part of the second joint shaft but cannot relatively rotate, so that the first joint shaft can drive the second joint shaft to rotate together through the prism body, a driven gear is arranged at the bottom end of the first joint shaft, and the bottom end of the second joint shaft is rotatably connected with a first sealing plate; the method is characterized in that:
the transmission assembly is used for driving a telescopic shaft in the jacking assembly to rotate and comprises a box body, an input shaft, a handle, a first bevel gear, a second bevel gear, a third bevel gear, an output shaft, a fourth bevel gear and a fifth bevel gear; the box body is arranged on the base, a left mounting hole is formed in the left end of the box body, a right mounting hole is formed in the right end of the box body, the left mounting hole and the right mounting hole are located on the same axis, and a first bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear and a fifth bevel gear mounting cavity are formed in the box body; the input shaft is transversely and rotatably arranged on the left mounting hole of the box body, the left end of the input shaft is exposed out of the box body, and the right end of the input shaft extends into the box body; the handle is used for providing a power source for the input shaft, is fixed at the left end of the input shaft and drives the input shaft to rotate forward and backward by moving the handle up and down in a reciprocating manner; the first bevel gear is an annular bevel gear, teeth are arranged on the annular inner ring surface, and the first bevel gear is arranged at the right end of the input shaft; the second bevel gear is an annular bevel gear, teeth are arranged on the annular inner ring surface, and the second bevel gear is arranged on the right side of the first bevel gear and is coaxially and symmetrically spaced with the first bevel gear; the third bevel gear is arranged between the first bevel gear and the second bevel gear and is meshed with the first bevel gear and the second bevel gear, the third bevel gear transmits the rotation of the first bevel gear to the second bevel gear, the rotation direction of the second bevel gear is opposite to that of the first bevel gear, and the third bevel gear is connected to the box body or the base through a rotating shaft; the output shaft is arranged in the box body, the output shaft and the input shaft are on the same axis, the right end of the output shaft is rotatably arranged on a right mounting hole of the box body and is exposed out of the box body, a shaft body of the output shaft is positioned in the annular inner rings of the first bevel gear and the second bevel gear, and the output shaft comprises a shaft sleeve, a one-way clutch block and a reversing shaft; the shaft sleeve is of a hollow structure, two unidirectional clutch block accommodating grooves are formed in the shaft body of the shaft sleeve and are communicated with the shaft sleeve in a hollow mode, the positions of the two accommodating grooves correspond to the annular inner ring teeth of the first bevel gear and the second bevel gear, and shaft holes for installing the unidirectional clutch blocks are formed in the two accommodating grooves; the one-way clutch block is used for realizing one-way clutch between the first bevel gear and the shaft sleeve and between the second bevel gear and the shaft sleeve, the number of the one-way clutch blocks is two, the two one-way clutch blocks are respectively and rotatably arranged in two arrangement grooves on the shaft sleeve, the one-way clutch block is fan-shaped, two ends of the outer periphery of the one-way clutch block are provided with teeth, the teeth are matched with teeth of annular inner rings of the first bevel gear and the second bevel gear, the inner periphery of the one-way clutch block is provided with two circular arc notches, the middle position of the one-way clutch block is provided with a pin hole, and the one-way clutch block is rotatably arranged on the arrangement grooves through; the reversing shaft is used for setting the rotating direction of the output shaft, the reversing shaft is rotatably arranged in the hollow of the shaft sleeve, the right end of the reversing shaft is exposed out of the shaft sleeve and is provided with a regulating button, the shaft core can rotate in the shaft sleeve by rotating the regulating button, the shaft body of the reversing shaft is provided with two blind holes, the positions of the two blind holes correspond to the positions of the two placing grooves, a spring is arranged in each blind hole, the top end of the spring is provided with a round ball, and the round ball is matched with an arc notch on the one-way; the fourth bevel gear is arranged on the output shaft and is positioned on the right side of the second bevel gear; the fifth bevel gear is rotatably arranged on the base, teeth are arranged on the peripheral surface of the fifth bevel gear, the teeth on the umbrella-shaped surface are meshed with the fourth bevel gear, and the teeth on the peripheral surface are meshed with a driven gear in the jacking assembly.
2. A mechanical jack as claimed in claim 1 wherein: the number of the third bevel gears is two, and the two third bevel gears are oppositely arranged and are respectively meshed with the first bevel gear and the second bevel gear.
3. A mechanical jack as claimed in claim 1 wherein: the number of the telescopic pipes can be larger than three sections, and the number of the telescopic shafts can be larger than two sections.
4. A mechanical jack as claimed in claim 1 wherein: the cross section of each section of the telescopic pipe is in a regular hexagon shape, the hollow cross section of the second section shaft is in a regular hexagon shape, and the prism is a hexagonal prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910955131.8A CN110775857B (en) | 2019-10-09 | 2019-10-09 | Mechanical jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910955131.8A CN110775857B (en) | 2019-10-09 | 2019-10-09 | Mechanical jack |
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| CN110775857A CN110775857A (en) | 2020-02-11 |
| CN110775857B true CN110775857B (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910955131.8A Active CN110775857B (en) | 2019-10-09 | 2019-10-09 | Mechanical jack |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112027957B (en) * | 2020-06-28 | 2023-09-22 | 杭州职业技术学院 | Intelligent movable jack |
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| CN110775857A (en) | 2020-02-11 |
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Effective date of registration: 20201214 Address after: No.8, Tianyi Road, Haian Economic Development Zone, Nantong City, Jiangsu Province, 226600 Applicant after: NANTONG TONGRUN AUTO ACCESSORY Co.,Ltd. Address before: 476000 lianghao family home, Suiyang District, Shangqiu City, Henan Province a54502 Applicant before: Wei Lei |
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