Side-driven jack

Abstract

The utility model discloses a side-driven jack which comprises a telescopic bearing main body and a power input component, a power input shaft is arranged at the top of the telescopic bearing main body, and the telescopic bearing main body is provided with an outer pipe and an inner pipe. One end of the inner pipe extends into the outer pipe, the inner pipe is movably connected with the outer pipe in a telescopic mode through a lead screw mechanism, the center line of the power input shaft is perpendicular to the telescopic direction of the telescopic bearing body, the power input component is fixedly connected with the power input shaft, and the power input component comprises a fixing component and a handle. The power input shaft of the side-driven jack is indirectly connected with the handle through the clutch structure, and the handle and the power input shaft are in a separated state, so that the power input shaft cannot respond to the misoperation, and the safety degree of operation is improved.

Description

Technical Field

[0001] The utility model relates to a side-driven jack. Background Art

[0002] The side-driven jack is provided with a power input shaft perpendicular to its telescopic direction at the top of its telescopic load-bearing body. When the jack works, the power input shaft is in a horizontal position. The handle of the jack is used as a power input component, directly fixedly connected to the power input shaft or the power input shaft and the handle are of an integrated structure. By shaking the handle, the jack can be driven to expand and contract, and when a sufficient support height is obtained, its support function can be exerted. Since the handle and the power input shaft are in a fixed connection relationship, the spatial attitude of the handle cannot be changed after the height of the jack is adjusted. Otherwise, shaking the handle will change the support height of the jack. The handle may be in a vertically upward state or vertically downward, or may be in an upward inclined state or a downward inclined state. When the jack exerts its support function, the attitude of the handle remains fixed. If an external force acts on the handle, the support height of the jack will be changed, and this misoperation is very likely to cause an unexpected situation, and thus an unpredictable accident. Therefore, the side-driven jack in the prior art will respond to misoperations and bring potential hazards to the operation. Summary of the Invention

[0003] The technical problem to be solved by the utility model is how to prevent the power input shaft from responding to misoperations, thereby bringing a side-driven jack with safe operation.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions: The side-driven jack includes a telescopic load-bearing body and a power input component. A power input shaft is provided at the top of the telescopic load-bearing body. The telescopic load-bearing body is provided with an outer tube and an inner tube. One end of the inner tube extends into the inner part of the outer tube, and the inner tube is movably connected with the outer tube in a telescopic manner through a screw mechanism. The center line of the power input shaft is perpendicular to the telescopic direction of the telescopic load-bearing body. The power input component is fixedly connected with the power input shaft. The power input component includes a fixed component and a handle. The fixed component includes a fixed seat, a movable sleeve, and a limit pin. The fixed seat is fixedly connected with the outer tube. The fixed seat is provided with a pin hole, an assembly hole, a cylindrical chamber, an outer annular chamber, an inner annular chamber, and a connecting groove. The cylindrical chamber is communicated with the assembly hole. The center line of the cylindrical chamber coincides with the center line of the assembly hole and is perpendicular to the telescopic direction of the telescopic load-bearing body. The pin hole is perpendicular to the assembly hole. The cylindrical chamber is located at the outer end of the assembly hole. The diameter of the cylindrical chamber is larger than the diameter of the assembly hole. The inner diameters of the outer annular chamber and the inner annular chamber are both equal to the diameter of the cylindrical chamber. The outer annular chamber is located at the outer end of the cylindrical chamber and is communicated with the cylindrical chamber. The inner annular chamber is located at the inner end of the cylindrical chamber and is communicated with the cylindrical chamber. The connecting groove is straight. One end of the connecting groove is communicated with the outer annular chamber, and the other end of the connecting groove is communicated with the inner annular chamber. The side surface of the connecting groove is communicated with the cylindrical chamber. The power input shaft passes through the assembly hole. One end of the limit pin is inserted into the pin hole. A limit groove is provided on the power input shaft. The limit groove is annular around the center line of the power input shaft. The other end of the limit pin is embedded in the limit groove. The movable sleeve is provided with a cylindrical part. The movable sleeve is provided with limit posts on the surface of the cylindrical part. The handle is installed on the movable sleeve. A connecting hole and a receiving hole are provided inside the movable sleeve. The connecting hole and the receiving hole are communicated. The receiving hole is located at the outer end of the connecting hole. The center line of the connecting hole coincides with the center line of the receiving hole and is perpendicular to the telescopic direction of the telescopic load-bearing body. The minimum width of the receiving hole is larger than the maximum width of the connecting hole. The cross section of the connecting hole is a non-centrally symmetric structure. One end of the power input shaft is provided with a connecting section. The cross section of the connecting section is a non-centrally symmetric structure and the cross section structure of the connecting section corresponds to the cross section structure of the connecting hole. The connecting section of the power input shaft extends into the inside of the movable sleeve. The end of the power input shaft with the connecting section passes through the cylindrical chamber. The center line of the power input shaft coincides with the center line of the cylindrical chamber. The connecting section protrudes outside the fixed seat. The cylindrical part of the movable sleeve extends into the cylindrical chamber. The movable sleeve is movably connected with the fixed seat. The power input shaft is movably connected with the movable sleeve. The movable range of the cylindrical part of the movable sleeve intersects with the cylindrical chamber. The movable range of the limit posts is located in the outer annular chamber, the inner annular chamber, and the connecting groove.The movable sleeve is embedded in the connection hole through the connection section and moves synchronously with the power input shaft in the circumferential direction around the central axis of the power input shaft. The movable sleeve is completely disengaged from the connection hole through the connection section and is located in the accommodation hole, moving asynchronously with the power input shaft in the circumferential direction around the central axis of the power input shaft.

[0005] In this technical solution, the handle is connected to the power input shaft through a fixing component, thereby forming an indirectly connected transmission structure between the handle and the power input shaft. The fixing component is not a single integral part, but a combined structure composed of a fixing seat, a movable sleeve, and a limit pin. The fixing component has a clutch function in transmission. The movable sleeve can change its relative position, i.e., the working position, inside the fixing seat and can maintain this position. The movable sleeve is movably connected to the power input shaft, and after changing the position of the movable sleeve relative to the power input shaft, a connection relationship between the movable sleeve and the power input shaft in the circumferential direction around the central axis of the power input shaft can be established. After the movable sleeve moves towards the outside of the fixing seat, a connection is obtained between the inside of the movable sleeve and the power input shaft through a cross-section with a non-centrally symmetric structure. The movable sleeve is embedded in the connection hole through the connection section and moves synchronously with the power input shaft in the circumferential direction around the central axis of the power input shaft. At this time, the handle can directly drive the power input shaft to rotate. After the movable sleeve moves towards the inside of the fixing seat, degrees of freedom in the direction along the central axis of the power input shaft and in the circumferential direction around the central axis of the power input shaft are obtained between the inside of the movable sleeve and the power input shaft. The movable sleeve is completely disengaged from the connection hole through the connection section and is located in the accommodation hole, moving asynchronously with the power input shaft in the circumferential direction around the central axis of the power input shaft. At this time, there is no transmission connection relationship between the handle and the power input shaft, and thus the handle can rotate freely independently of the power input shaft. In this way, when the handle and the power input shaft are in a separated state, the handle is always located at one end of the power input shaft, and the spatial position of the handle remains unchanged. However, the handle can rotate freely without driving the power input shaft to rotate, and thus will not change the support height of the jack. Therefore, even if the handle is accidentally operated and rotated, the power input shaft will not respond to this accidental operation.

[0006] In this technical solution, in addition to being able to connect with the movable sleeve, the connection section of the power input shaft can also be connected to the power input shaft through the sleeve of an electric tool, and then the jack can be driven by the electric tool. Driving the power input shaft to rotate through the handle is manual operation, and driving the power input shaft to rotate through the electric tool is electric operation. When switching between the two operations, it is not necessary to disassemble and assemble the parts of the jack itself. Therefore, when switching between the manual operation and the electric operation of the jack in this technical solution, no part disassembly and assembly are involved.

[0007] The working position of the movable sleeve within the fixed seat, i.e., the working station, is obvious and clear, which benefits from the limiting effect of the outer annular chamber and the inner annular chamber. Once the limiting post entirely enters the outer annular chamber or the inner annular chamber, whether the movable sleeve drives the power input shaft to rotate or the power tool drives the power input shaft to rotate, the direction of the acting force driving the power input shaft is perpendicular to the center line of the power input shaft, and there is no other acting force in the vertical direction that can change the position of the movable sleeve relative to the fixed seat. The movable sleeve can maintain a connection relationship of being stationary only relative to the fixed seat or only relative to the power input shaft. When the handle or the power tool is operated normally, the clutch state will not change, which enables the clutch function to be stably exerted.

[0008] The receiving hole of the movable sleeve is larger than the connecting hole. When the connecting section of the power input shaft is in the receiving hole, there is a gap between the connecting section of the power input shaft and the movable sleeve. This gap can accommodate the sleeve of the power tool, and at this time, the sleeve is not connected to the movable sleeve. The purpose of this design is to make the electric operation mode tend to be unique, that is, to encourage the power tool to drive the jack after combining the specified sleeve; if the connecting section is located outside the movable sleeve, it may occur that the power tool combines other non-specified sleeves to try to drive the jack. At this time, it is very likely that there will be a slipping phenomenon between the mismatched sleeve and the connecting section, and the reasonable structure of the connecting section will be damaged by incorrect operation, which is not beneficial to long-term normal use. Therefore, with the design of the movable sleeve surrounding the connecting section, the purpose of urging the use of the correct type of sleeve can be achieved.

[0009] In this technical solution, in order to strengthen the ability of the power input shaft to avoid misoperation, the included angle between the limiting post and the handle relative to the center line of the power input shaft is greater than or less than the included angle between the direction from the center line of the power input shaft to the connecting groove and the vertically downward direction. This is to avoid the situation where the handle droops due to its own weight in the natural state and the limiting post just aligns with the connecting groove. At the same time, it is required that the handle must swing a certain angle from the natural state before the limiting post can align with the connecting groove, and only at this time is the position of the movable sleeve on the fixed seat allowed to change.

[0010] The swinging angle of the handle is an element for the power input shaft to avoid misoperation and is also a basic condition for the power input shaft to respond to correct operation. After the handle swings, its attitude changes. In order to obtain the maximum attitude change on the movable sleeve, the sum of the included angle between the limiting post and the handle relative to the center line of the power input shaft and the included angle between the direction from the center line of the power input shaft to the connecting groove and the vertically downward direction is 180 degrees. This is equivalent to the handle swinging through an angle of 180 degrees. Such an attitude change based on the actual operation situation can clearly convey the operator's intention of operating the handle correctly.

[0011] Considering the situation that there are two connecting grooves vertically distributed on the fixed seat, and the angle between the limiting post and the handle relative to the center line of the power input shaft is equal to the angle between the direction from the center line of the power input shaft to the connecting groove and the vertically downward direction. In order to obtain the maximum attitude change amount of the handle swing, the width of one of the connecting grooves is greater than that of the other connecting groove. There are two limiting posts on the movable sleeve, and the width of one of the limiting posts is greater than that of the other limiting post. The connecting grooves and the limiting posts correspond one by one, and the angle between the two connecting grooves relative to the center line of the power input shaft is equal to the angle between the two limiting posts relative to the center line of the power input shaft. The one-to-one correspondence between the connecting groove and the limiting post means that the wider connecting groove corresponds to the wider limiting post, and the narrower connecting groove corresponds to the narrower limiting post. Only when the wider limiting post is aligned with the wider connecting groove and the narrower limiting post is aligned with the narrower connecting groove, the movable sleeve is allowed to change its position on the fixed seat.

[0012] In order to make the appearance of the jack have a simple visual feature, and at the same time, mainly to improve the connection strength between the fixed part and the outer tube, the telescopic load-bearing body is provided with a mounting shell at the top of the outer tube. The mounting shell is fixedly connected with the outer tube. The power input shaft is located in the mounting shell. One end of the fixed seat with an assembly hole is embedded in the mounting shell, and the side surface of the other end of the fixed seat is flush with the surface of the mounting shell. The fixed seat is fixedly connected with the outer tube through the mounting shell.

[0013] In order to successfully manufacture the fixed seat structure under the existing processing conditions, the technical solution adopts a split design idea for the fixed seat. Specifically, the fixed seat includes a body and an end cover. The end cover is fixedly installed on the body through bolts, and the outer annular chamber is located between the body and the end cover. The body is obtained by machining a whole piece of metal, and the end cover is a plate-like structure. During assembly, the two can be completed by tightening with bolts. In addition, the body is an open structure at the outer annular chamber, so the width of the outer annular chamber in the direction parallel to the center line of the power input shaft is easier to control during manufacturing.

[0014] For the preferred scheme of the non-central symmetric structure, the cross-sectional structure of the connecting section is one of a regular polygon, an ellipse, a plum blossom shape, and a concave polygon. The regular polygon can be an equilateral triangle, a square, a regular pentagon, a regular hexagon, etc.; the plum blossom shape can be a four-petal plum blossom shape, a five-petal plum blossom shape, a six-petal plum blossom shape; the concave polygon can be a five-pointed star, a six-pointed star, a ten-pointed star, etc.

[0015] In order to further improve the ability of the power input shaft to avoid misoperation, the fixed part further includes a spring. The spring is installed on the power input shaft and is located between the movable sleeve and the fixed seat. The spring can make the relative position of the movable sleeve on the fixed seat more stable.

[0016] The prerequisite for the spring needle to exert a reset function on the movable sleeve is that there is sufficient compression. To prevent the spring from bending in the compressed state, an outer limit hole is provided on the movable sleeve. The outer limit hole is located at the inner end of the connection hole, and the diameter of the outer limit hole is larger than that of the connection hole. An inner limit hole is provided on the fixed seat. The inner limit hole is located between the cylindrical chamber and the assembly hole, and the diameter of the inner limit hole is smaller than that of the cylindrical chamber. One end of the spring is located in the outer limit hole, and the other end of the spring is located in the inner limit hole. The spring is limited by the upper limit hole and the lower limit hole.

[0017] After the present utility model adopts the above technical solutions: the power input shaft of the side-driven jack is indirectly connected to the handle through a clutch structure. When the handle and the power input shaft are in a separated state, the power input shaft will not respond to this misoperation, improving the safety of the operation. It can also be compatible with electric operation to drive the power input shaft, and the electric operation process can avoid unreasonable combination forms, thereby extending the service life. Brief Description of the Drawings

[0018] The present utility model will be further specifically described below in conjunction with the drawings and specific embodiments.

[0019] Figure 1 It is a schematic diagram of the internal structure of the first embodiment of the present utility model in the manual operation state and with the handle hanging naturally;

[0020] Figure 2 is Figure 1 partial enlarged view;

[0021] Figure 3 It is a schematic diagram of the positional relationship between the limit post and the quasi-connection groove of the first embodiment of the present utility model in the manual operation state and with the handle hanging naturally;

[0022] Figure 4 It is a schematic diagram of the internal structure of the first embodiment of the present utility model in the manual operation state and with the limit post aligned with the connection groove;

[0023] Figure 5 is Figure 4 partial enlarged view;

[0024] Figure 6 It is a schematic diagram of the positional relationship between the limit post and the quasi-connection groove of the first embodiment of the present utility model in the manual operation state and with the limit post aligned with the connection groove;

[0025] Figure 7 It is a schematic diagram of the internal structure of the first embodiment of the present utility model in the electric operation state and with the limit post aligned with the connection groove;

[0026] Figure 8Stereogram of the power input shaft of the first embodiment of the present utility model;

[0027] Figure 9 Front view of the movable sleeve of the first embodiment of the present utility model;

[0028] Figure 10 For Figure 9 Bottom view;

[0029] Figure 11 Stereogram of the movable sleeve of the first embodiment of the present utility model;

[0030] Figure 12 Schematic diagram of the internal structure of the movable sleeve of the first embodiment of the present utility model Figure Ⅰ ;

[0031] Figure 13 Schematic diagram of the internal structure of the movable sleeve of the first embodiment of the present utility model Figure Ⅱ ;

[0032] Figure 14 Stereogram of the body of the fixed seat of the first embodiment of the present utility model;

[0033] Figure 15 Schematic diagram of the internal structure of the fixed seat of the first embodiment of the present utility model Figure Ⅰ ;

[0034] Figure 16 Schematic diagram of the internal structure of the fixed seat of the first embodiment of the present utility model Figure Ⅱ ;

[0035] Figure 17 Schematic diagram of the positional relationship between the limit post and the quasi-connection groove in the manual operation state and with the handle in the natural hanging state of the second embodiment of the present utility model;

[0036] Figure 18 Schematic diagram of the positional relationship between the limit post and the quasi-connection groove in the manual operation state and with the handle in the natural hanging state of the third embodiment of the present utility model;

[0037] Figure 19 Schematic diagram of the positional relationship between the limit post and the quasi-connection groove in the manual operation state and with the handle in the natural hanging state of the fourth embodiment of the present utility model. Detailed implementation manners

[0038] As Figures 1 to 16 shown, the first embodiment of the present utility model.

[0039] The side-driven jack includes a telescopic load-bearing body 1 and a power input component 7. The telescopic load-bearing body 1 includes an outer tube 2, an inner tube, a lead screw, a nut, a bearing, a pressing plate, a mounting shell 3, a helical gear, and a power input shaft 4.

[0040] The nut is fixedly installed in the inner tube. One end of the lead screw extends into the inner tube and the lead screw meshes with the nut. Both the inner tube and the lead screw extend into the outer tube 2. A flange is provided on the lead screw, and the flange is located above the nut. The pressing plate is fixed inside the outer tube 2, and the bearing is installed on the lead screw and is located above the flange. The other end of the lead screw passes through the pressing plate, and the bearing is located between the pressing plate and the flange; a helical gear is installed at the end of the lead screw passing through the pressing plate.

[0041] The mounting shell 3 has a hollow structure inside. It is fixedly connected to the outer tube 2. After connection, the internal space of the mounting shell 3 is communicated with the internal space of the outer tube 2. In the use state, the mounting shell 3 is located at the top of the outer tube 2. The power input shaft 4 is located inside the mounting shell 3. One end of the power input shaft 4 is movably connected to the mounting shell 3 through a sliding sleeve; the power input shaft 4 is located at the top of the telescopic load-bearing body 1. The center line of the power input shaft 4 is perpendicular to the center line of the lead screw. A helical gear is installed on the power input shaft 4. The power input shaft 4 and the lead screw are in a transmission connection relationship through the meshing of two helical gears. When the power input shaft 4 rotates, the lead screw can be driven to rotate. The movement of the lead screw can drive the nut to move along the center line of the lead screw. Finally, a structure is formed in which the inner tube is movably connected to the outer tube 2 through a lead screw mechanism including a lead screw and a nut. The inner tube moves telescopically in the outer tube 2. Overall, the telescopic movement of the telescopic load-bearing body 1 is formed. The telescopic direction of the telescopic load-bearing body 1 is perpendicular to the center line of the power input shaft 4.

[0042] The power input component 7 includes a fixing component and a handle 8. The fixing component includes a fixing seat 16, a movable sleeve 9, a limit pin 14, and a spring 15. The fixing seat 16 is composed of a body 17 and an end cover 25.

[0043] The exterior of the body 17 is a boss structure with one end wide and one end narrow. The narrower end of the body 17 is embedded in the mounting shell 3, and the wider end of the body 17 is located outside the mounting shell 3. In this embodiment, for the convenience of description, the part closer to the mounting shell 3 is regarded as the inner end, and the part farther from the mounting shell 3 is regarded as the outer end. It is not difficult to understand that the inner end of the body 17 is embedded in the mounting shell 3, and the outer end of the body 17 is located outside the mounting shell 3. After the body 17 and the mounting shell 3 are combined, they are fixedly connected by welding. Through surface grinding treatment, until the side surface of the wider end of the body 17, that is, the outer end, is flush with the surface of the mounting shell 3, so that the fixing seat 16 is fixedly connected to the outer tube 2 through the mounting shell 3. The interior of the body 17 is hollow, and specifically includes a pin hole 18, an assembly hole 19, a cylindrical chamber 20, an outer annular groove, an inner annular chamber 22, a connecting groove 23, and an inner limiting hole 24. The end cover 25 is a ring structure, and it is fixedly installed on the body 17 by bolts. After installation, it directly covers the outer annular groove, so that the outer annular groove is surrounded by the body 17 and the end cover 25, increasing the degree of closure, and thus forming an outer annular chamber 21. The outer annular chamber 21 is located between the body 17 and the end cover 25. That is to say, the fixing seat 16 is internally provided with a pin hole 18, an assembly hole 19, a cylindrical chamber 20, an outer annular chamber 21, an inner annular chamber 22, and a connecting groove 23. On the center line of the fixing seat 16, the cylindrical chamber 20, the inner limiting hole 24, and the assembly hole 19 are arranged in sequence, and the center line of the fixing seat 16, the center line of the cylindrical chamber 20, the center line of the assembly hole 19, and the center line of the inner limiting hole 24 coincide; the center line of the cylindrical chamber 20 is perpendicular to the telescopic direction of the telescopic load-bearing body 1.

[0044] The inner limiting hole 24 is located between the cylindrical chamber 20 and the assembly hole 19. The cylindrical chamber 20 communicates with the inner limiting hole 24, and the inner limiting hole 24 communicates with the assembly hole 19. After installation, the end of the fixing seat 16 provided with the assembly hole 19 is embedded in the mounting shell 3.

[0045] The diameter of the assembly hole 19 corresponds to the diameter of the power input shaft 4, and there is a clearance fit between the assembly hole 19 and the power input shaft 4. The diameter of the inner limit hole 24 is larger than that of the assembly hole 19. It is located at the outer end of the assembly hole 19 and at the inner end of the cylindrical chamber 20. The fixing seat 16 forms a stepped surface between the inner limit hole 24 and the assembly hole 19. The diameter of the assembly hole 19 is smaller than that of the cylindrical chamber 20, and it is located at the inner end of the inner limit hole 24. Both the outer annular chamber 21 and the inner annular chamber 22 are annular structures. The inner diameter of the outer annular chamber 21 and the inner diameter of the inner annular chamber 22 are both equal to the diameter of the cylindrical chamber 20. The outer annular chamber 21 is located at the outer end of the cylindrical chamber 20 and the outer annular chamber 21 communicates with the cylindrical chamber 20. The inner annular chamber 22 is located at the inner end of the cylindrical chamber 20 and the inner annular chamber 22 communicates with the cylindrical chamber 20. The connecting groove 23 is located on the side of the cylindrical chamber 20 and the connecting groove 23 is straight. There are two connecting grooves 23 symmetrically distributed with respect to the center line of the cylindrical chamber 20 inside the fixing seat 16. The two connecting grooves 23 are in the same horizontal direction, and the widths of the two connecting grooves 23 are the same. One end of the connecting groove 23 communicates with the outer annular chamber 21, and the other end of the connecting groove 23 communicates with the inner annular chamber 22. The side of the connecting groove 23 communicates with the cylindrical chamber 20. The width of the outer annular chamber 21 in the direction parallel to the center line of the fixing seat 16 is smaller than the width of the inner annular chamber 22 in the direction parallel to the center line of the fixing seat 16.

[0046] The pin holes 18 are distributed at the inner end of the fixing seat 16, that is, the narrower end of the body 17. The pin holes 18 communicate with the assembly hole 19. The pin holes 18 are perpendicular to the assembly hole 19, and the pin holes 18 are equally angularly distributed around the center line of the assembly hole 19. The power input shaft 4 passes through the assembly hole 19, and a limit groove 5 is provided on the power input shaft 4. The limit groove 5 is annular around the center line of the power input shaft 4. One end of the limit pin 14 is inserted into the pin hole 18, and the other end of the limit pin 14 is embedded in the limit groove 5. In this way, the limit pins 14 are equally angularly distributed around the center line of the power input shaft 4. After installation, the pin holes 18 are located inside the installation shell 3, and the installation shell 3 shields the pin holes 18, thereby achieving the visual effect of hiding the pin holes 18. The power input shaft 4 is movably installed on the fixing seat 16 through the limit pins 14, and the power input shaft 4 can rotate relative to the fixing seat 16. The center line of the power input shaft 4 coincides with the center line of the fixing seat 16.

[0047] One end of the power input shaft 4 is provided with a connecting section 6. The cross-section of the connecting section 6 is a non-centrally symmetric structure, such as a regular hexagon. The connecting section 6 of the power input shaft 4 passes through the cylindrical chamber 20 of the fixing seat 16 and protrudes outside the fixing seat 16. The center line of the power input shaft 4 coincides with the center line of the cylindrical chamber 20.

[0048] The inside of the movable sleeve 9 is also hollow. Its interior includes an outer limit hole 10, a connection hole 11, and a receiving hole 12. The outer limit hole 10, the connection hole 11, and the receiving hole 12 are in communication, and the center lines of the outer limit hole 10, the connection hole 11, and the receiving hole 12 coincide. The receiving hole 12 is located at the outer end of the connection hole 11, and the outer limit hole 10 is located at the inner end of the connection hole 11. The outer limit hole 10 has a circular cross-section, and the diameter of the outer limit hole 10 is greater than the maximum width of the connection hole 11, which causes a stepped surface to be formed between the outer limit hole 10 and the connection hole 11 of the movable sleeve 9. The cross-section of the connection hole 11 has a non-centrally symmetric structure, and the cross-sectional structure of the connection hole 11 corresponds to the cross-sectional structure of the connection section 6. Therefore, the cross-section of the connection hole 11 is also a regular hexagon. The receiving hole 12 has a circular cross-section, and the minimum width of the receiving hole 12, that is, the diameter of the receiving hole 12, is greater than the maximum width of the connection hole 11. The outside of the movable sleeve 9 is provided with a cylindrical portion, and two limit posts 13 symmetrically distributed with respect to the center line of the movable sleeve 9 are provided on the surface of the cylindrical portion of the movable sleeve 9. The handle 8 is installed on the movable sleeve 9. The cylindrical portion of the movable sleeve 9 extends into the cylindrical chamber 20, and the movable sleeve 9 is movably connected to the fixed seat 16, and the movable sleeve 9 can rotate within the fixed seat 16.

[0049] After the movable sleeve 9 is installed, the connection section 6 of the power input shaft 4 extends into the inside of the movable sleeve 9. The power input shaft 4 is movably connected to the movable sleeve 9, and the two limit posts 13 are symmetrically distributed with respect to the center line of the power input shaft 4. The movement range of the limit posts 13 is located in the outer annular chamber 21, the inner annular chamber 22, and the connection groove 23. At any moment, the limit posts 13 are embedded in the outer annular chamber 21 or the inner annular chamber 22 or the connection groove 23. The two limit posts 13 and the handle 8 are distributed on the same straight line. Due to the self-weight of the handle 8, in the initial state, the handle 8 will be in the vertical state, making the two limit posts 13 and the handle 8 arranged straight in the vertical direction. Obviously, the limit posts 13 and the connection groove 23 distributed in the horizontal direction are misaligned in the circumferential direction around the center line of the power input shaft 4. If the limit posts 13 are to be aligned with the connection groove 23, the handle 8 needs to swing by ninety degrees, which is equivalent to the movable sleeve 9 rotating by ninety degrees relative to the fixed seat 16. At this time, the handle 8 is in the horizontal state. Therefore, when the limit posts 13 and the connection groove 23 are in a misaligned state, the relative position relationship between the movable sleeve 9 and the fixed seat 16 in the direction parallel to the center line of the power input shaft 4 will not be changed. The angle β between the limit posts 13 and the handle 8 with respect to the center line of the power input shaft 4 is zero degrees, the angle α between the direction of the center line of the power input shaft 4 to the connection groove 23 and the vertically downward direction is ninety degrees, and the angle β between the limit posts 13 and the handle 8 with respect to the center line of the power input shaft 4 is less than the angle α between the direction of the center line of the power input shaft 4 to the connection groove 23 and the vertically downward direction.

[0050] The spring 15 is installed on the power input shaft 4 and is located between the movable sleeve 9 and the fixed seat 16. One end of the spring 15 is located in the outer limit hole 10, and the other end of the spring 15 is located in the inner limit hole 24. The spring 15 is always in a compressed state. The direction of the thrust force exerted by the spring 15 on the limiting post 13 and acting on the movable sleeve 9 is parallel to the connecting groove 23. It has a tendency to push the movable sleeve 9 outwards from the fixed seat 16. However, restricted by the outer annular chamber 21 and the inner annular chamber 22, the cylindrical part of the movable sleeve 9 can only be inside the fixed seat 16. Therefore, the movement range of the cylindrical part of the movable sleeve 9 intersects with the cylindrical chamber 20. In the initial state, there can only be a state where the movable sleeve 9 is embedded in the connecting hole 11 through the connecting section 6 and moves synchronously with the power input shaft 4 in the circumferential direction around the center line of the power input shaft 4, or a state where the movable sleeve 9 completely disengages from the connecting hole 11 through the connecting section 6 and is located in the receiving hole 12 and moves asynchronously with the power input shaft 4 in the circumferential direction around the center line of the power input shaft 4.

[0051] When the movable sleeve 9 and the power input shaft 4 are in a synchronous movement state, the entire connecting section 6 is embedded in the connecting hole 11, the connecting section 6 does not extend into the receiving hole 12, and there is a clearance fit between the connecting section 6 of the power input shaft 4 and the movable sleeve 9, and their cross-sections are the same. Therefore, when the holding handle 8 drives the movable sleeve 9 to rotate, it will surely drive the power input shaft 4 to move. The limiting post 13 is located in the outer annular chamber 21, and the spring 15 always provides an outward pushing force on the movable sleeve 9, so that the limiting post 13 is always in the outer annular chamber 21 during the rotation of the movable sleeve 9. At this time, only manual operation can be performed through the handle 8.

[0052] When the movable sleeve 9 and the power input shaft 4 are in an asynchronous movement state, the entire connecting section 6 disengages from the connecting hole 11 and the entire connecting section 6 extends into the receiving hole 12, and the connection relationship between the connecting section 6 of the power input shaft 4 and the movable sleeve 9 is disconnected. At this time, even if the movable sleeve 9 is driven to move, it cannot drive the power input shaft 4 to rotate, and the movable sleeve 9 and the power input shaft 4 move independently of each other. The connecting section 6 is in the receiving hole 12, and a gap for accommodating the sleeve of the power tool is formed between the connecting section 6 and the movable sleeve 9. At this time, only by installing a sleeve on the connecting section 6 and holding the power tool can electric operation be performed. Any misoperation of the handle 8 will not get a response from the power input shaft 4.

[0053] The switching process between the synchronous motion state and the asynchronous motion state is the switching process between manual operation and electric operation. If the current state is the synchronous motion state, rotate the movable sleeve 9 and squeeze it inward. When the limiting post 13 aligns with the connecting groove 23, the limiting post 13 will pass through the connecting groove 23 along the trend until the movable sleeve 9 further extends into the fixed seat 16 and the limiting post 13 is located in the inner annular chamber 22. Then rotate the movable sleeve 9 and release the movable sleeve 9, so that the spring 15 presses against the movable sleeve 9 and the limiting post 13 is blocked by the main body 17 of the fixed seat 16. At the same time, relying on the self-weight of the handle 8, the handle 8 droops to the lowest position, causing the limiting post 13 to be in a vertical state and misaligned with the connecting groove 23. Finally, the movable sleeve 9 is in a static state.

[0054] If the current state is the asynchronous motion state, rotate the movable sleeve 9. When the limiting post 13 aligns with the connecting groove 23, the spring 15 pushes the movable sleeve 9 to move outward, and at the same time, it is necessary to pull the movable sleeve 9 outward manually until the limiting post 13 is located in the outer annular chamber 21. At this time, the spring 15 presses against the movable sleeve 9 and provides a force to maintain the state of the movable sleeve 9 in the outer annular chamber 21. When the connecting hole 11 is docked with the connecting section 6 of the power input shaft 4, the limiting post 13 is located in the connecting groove 23. Since the width of the connecting groove 23 is greater than the width of the limiting post 13, the movable sleeve 9 can rotate a certain angle relative to the fixed seat 16 at this time. This rotation amplitude is used for the connecting hole 11 to be paired with the connecting section 6. When the angle of the connecting section 6 cannot make its cross-section just parallel to the cross-section of the connecting hole 11, the movable sleeve 9 can be rotated appropriately to make the angular attitude of the connecting hole 11 completely correspond to the angular attitude of the connecting section 6, so as to facilitate the connecting hole 11 to adapt to the connecting section 6.

[0055] As Figure 17 shown, in the second embodiment of the present invention, the difference from the first embodiment is that the two connecting grooves 23 are in the same vertical direction, the angle α between the center line of the power input shaft 4 and the direction of the connecting groove 23 and the vertically downward direction is zero degree, the two limiting posts 13 and the handle 8 are not distributed in the same straight line direction, the angle β between the limiting post 13 and the handle 8 relative to the center line of the power input shaft 4 is ninety degrees, and the angle β between the limiting post 13 and the handle 8 relative to the center line of the power input shaft 4 is greater than the angle α between the center line of the power input shaft 4 and the direction of the connecting groove 23 and the vertically downward direction. The handle 8 needs to be rotated ninety degrees to align the limiting post 13 with the connecting groove 23.

[0056] As Figure 18As shown in the figure, in the third embodiment of the present utility model, the difference from the first embodiment is that the widths of the two connecting grooves 23 are different, the width of one of the connecting grooves 23 is greater than that of the other connecting groove 23, the two limiting posts 13 and the handle 8 are not distributed in the same straight line direction, the included angle β between the limiting post 13 and the handle 8 relative to the center line of the power input shaft 4 is ninety degrees, the widths of the two limiting posts 13 are different, and the width of one of the limiting posts 13 is greater than that of the other limiting post 13. The included angle α between the direction of the center line of the power input shaft 4 to the connecting groove 23 and the vertically downward direction is ninety degrees, so that the included angle β between the limiting post 13 and the handle 8 relative to the center line of the power input shaft 4 is equal to the included angle α between the direction of the center line of the power input shaft 4 to the connecting groove 23 and the vertically downward direction, and the sum of the two included angles is one hundred and eighty degrees. The connecting grooves 23 and the limiting posts 13 are in one-to-one correspondence. The specific correspondence relationship is that the wider limiting post 13 is embedded in the wider connecting groove 23 but cannot be embedded in the narrower connecting groove 23, and the narrower limiting post 13 can be embedded in both the wider connecting groove 23 and the narrower connecting groove 23. The included angle between the two connecting grooves 23 relative to the center line of the power input shaft 4 is equal to the included angle between the two limiting posts 13 relative to the center line of the power input shaft 4, and the included angle is one hundred and eighty degrees. In this embodiment, when the wider limiting post 13 is aligned with the wider connecting groove 23 and the narrower limiting post 13 is aligned with the narrower connecting groove 23, the handle 8 is located above the limiting post 13; when the wider limiting post 13 is aligned with the narrower connecting groove 23 and the narrower limiting post 13 is aligned with the wider connecting groove 23, the handle 8 is located below the limiting post 13. Therefore, starting from the initial state where the handle 8 is located below the limiting post 13, the handle 8 needs to rotate one hundred and eighty degrees to align the limiting post 13 with the connecting groove 23.

[0057] As Figure 19 shown in the figure, in the fourth embodiment of the present utility model, the difference from the third embodiment is that the two connecting grooves 23 are in the same vertical direction, and the two limiting posts 13 and the handle 8 are in the same straight line direction. When the wider limiting post 13 is aligned with the wider connecting groove 23 and the narrower limiting post 13 is aligned with the narrower connecting groove 23, the handle 8 is located above the limiting post 13; when the wider limiting post 13 is aligned with the narrower connecting groove 23 and the narrower limiting post 13 is aligned with the wider connecting groove 23, the handle 8 is located below the limiting post 13. Therefore, starting from the initial state where the handle 8 is located below the limiting post 13, the handle 8 needs to rotate one hundred and eighty degrees to align the limiting post 13 with the connecting groove 23.

[0058] In the fifth embodiment of the present utility model, the difference from the first embodiment is that there is only one limiting post.

[0059] In the sixth embodiment of the present utility model, the difference from the fifth embodiment is that there is only one connecting groove.

[0060] The seventh embodiment of the present utility model is different from the second embodiment in that there is only one limit post.

[0061] The eighth embodiment of the present utility model is different from the seventh embodiment in that there is only one connection groove.

[0062] The ninth embodiment of the present utility model is different from the third embodiment in that there is only one relatively wide limit post.

[0063] The tenth embodiment of the present utility model is different from the ninth embodiment in that there is only one relatively wide connection groove.

[0064] The eleventh embodiment of the present utility model is different from the fourth embodiment in that there is only one relatively wide limit post.

[0065] The twelfth embodiment of the present utility model is different from the eleventh embodiment in that there is only one relatively wide connection groove.

[0066] The thirteenth embodiment of the present utility model is different from the first embodiment in that the spring, the outer limit hole and the inner limit hole are cancelled.

[0067] The fourteenth embodiment of the present utility model is different from the thirteenth embodiment in that the angle between the center line of the power input shaft and the direction of the connection groove is zero degree, and the angle between the limit post and the handle with respect to the center line of the power input shaft is zero degree.

[0068] For the above second to twelfth embodiments, corresponding numbers of embodiments can also be obtained by cancelling the spring, the outer limit hole and the inner limit hole.

[0069] For the above first to fourteenth embodiments, corresponding numbers of embodiments can also be obtained by selecting other non-central symmetric structures, such as equilateral triangle, square, regular pentagon, four-petal plum blossom shape, five-petal plum blossom shape, six-petal plum blossom shape, pentagram, hexagram, heptagram, octagram, enneagram, decagram.

Claims

1. A side-driven jack, comprising a telescopic load-bearing body (1) and a power input component (7), wherein a power input shaft (4) is provided at the top of the telescopic load-bearing body (1), the telescopic load-bearing body (1) is provided with an outer tube (2) and an inner tube, one end of the inner tube extends into the outer tube (2) and the inner tube is movably connected to the outer tube (2) in a telescopic manner through a screw mechanism, the center line of the power input shaft (4) is perpendicular to the telescopic direction of the telescopic load-bearing body (1), the power input component (7) is fixedly connected to the power input shaft (4), and is characterized in that: The power input component (7) comprises a fixing component and a handle (8), wherein the fixing component comprises a fixing seat (16), a movable sleeve (9), and a limit pin (14); the fixing seat (16) is fixedly connected to the outer tube (2); the fixing seat (16) is provided with a pin hole (18), an assembly hole (19), a cylindrical chamber (20), an outer annular chamber (21), an inner annular chamber (22), and a connecting groove (23); the cylindrical chamber (20) is connected to the assembly hole (19); the center line of the cylindrical chamber (20) coincides with the center line of the assembly hole (19) and is perpendicular to the telescopic direction of the telescopic load-bearing body (1); the pin hole (18) is perpendicular to the assembly hole (19); The cylindrical chamber (20) is located at the outer end of the assembly hole (19), the diameter of the cylindrical chamber (20) is larger than the diameter of the assembly hole (19), the inner diameter of the outer annular chamber (21) and the inner diameter of the inner annular chamber (22) are both equal to the diameter of the cylindrical chamber (20), the outer annular chamber (21) is located at the outer end of the cylindrical chamber (20) and the outer annular chamber (21) is connected to the cylindrical chamber (20), the inner annular chamber (22) is located at the inner end of the cylindrical chamber (20) and the inner annular chamber (22) is connected to the cylindrical chamber (20), the connecting groove (23) is straight, one end of the connecting groove (23) is connected to the outer annular chamber (21), and the inner end of the connecting groove (23) is connected to the outer annular chamber (21). The other end of the connecting groove (23) is communicated with the inner annular chamber (22), and the side of the connecting groove (23) is communicated with the cylindrical chamber (20). The power input shaft (4) passes through the assembly hole (19), and one end of the limit pin (14) is inserted into the pin hole (18). The power input shaft (4) is provided with a limit groove (5), and the limit groove (5) is annular around the center line of the power input shaft (4). The other end of the limit pin (14) is embedded in the limit groove (5). The movable sleeve (9) is provided with a cylindrical portion, and the movable sleeve (9) is provided with a limit column (13) on the surface of the cylindrical portion. The handle (8) is installed on the movable sleeve (9), and the inside of the movable sleeve (9) A connecting hole (11) and a receiving hole (12) are provided, the connecting hole (11) and the receiving hole (12) are communicated, the receiving hole (12) is located at the outer end of the connecting hole (11), the center line of the connecting hole (11) coincides with the center line of the receiving hole (12) and is perpendicular to the telescopic direction of the telescopic load-bearing body (1), the minimum width of the receiving hole (12) is greater than the maximum width of the connecting hole (11), the cross section of the connecting hole (11) is a non-center-symmetrical structure, a connecting section (6) is provided at one end of the power input shaft (4), the cross section of the connecting section (6) is a non-center-symmetrical structure and the cross section structure of the connecting section (6) corresponds to the cross section structure of the connecting hole (11), the connecting section (6) of the power input shaft (4) extends into the interior of the movable sleeve (9), and the end of the power input shaft (4) provided with the connecting section (6) passes through the cylindrical chamber (20),The center line of the power input shaft (4) coincides with the center line of the cylindrical chamber (20); the connecting section (6) protrudes outside the fixing seat (16); the cylindrical portion of the movable sleeve (9) extends into the cylindrical chamber (20); the movable sleeve (9) is movably connected to the fixing seat (16); the power input shaft (4) is movably connected to the movable sleeve (9); the movable range of the cylindrical portion of the movable sleeve (9) intersects with the cylindrical chamber (20); the movable range of the limiting column (13) is The range is located in the outer annular chamber (21), the inner annular chamber (22), and the connecting groove (23); the movable sleeve (9) is embedded in the connecting hole (11) through the connecting section (6) and moves synchronously with the power input shaft (4) in the circumferential direction around the center line of the power input shaft (4); the movable sleeve (9) is completely separated from the connecting hole (11) through the connecting section (6) and is located in the receiving hole (12) and moves asynchronously with the power input shaft (4) in the circumferential direction around the center line of the power input shaft (4).

2. The side-driven jack according to claim 1, characterized in that: The angle between the limit column (13) and the handle (8) relative to the center line of the power input shaft (4) is greater than or less than the angle between the direction from the center line of the power input shaft (4) to the connecting groove (23) and the vertical downward direction.

3. The side-driven jack according to claim 1, characterized in that: The sum of the angle between the limit column (13) and the handle (8) relative to the center line of the power input shaft (4) and the angle between the direction from the center line of the power input shaft (4) to the connecting groove (23) and the vertical downward direction is 180 degrees.

4. The side-driven jack according to claim 3, characterized in that: The fixing seat (16) is provided with two connecting grooves (23), wherein the width of one connecting groove (23) is greater than the width of the other connecting groove (23); the movable sleeve (9) is provided with two limiting posts (13), wherein the width of one limiting post (13) is greater than the width of the other limiting post (13); the connecting grooves (23) correspond to the limiting posts (13) one by one, and the angle between the two connecting grooves (23) and the center line of the power input shaft (4) is equal to the angle between the two limiting posts (13) and the center line of the power input shaft (4).

5. The side-driven jack according to claim 1, characterized in that: The telescopic load-bearing body (1) is provided with a mounting shell (3) at the top of the outer tube (2); the mounting shell (3) is fixedly connected to the outer tube (2); the power input shaft (4) is located in the mounting shell (3); one end of the fixing seat (16) is provided with an assembly hole (19) and is embedded in the mounting shell (3); the side surface of the other end of the fixing seat (16) is flush with the surface of the mounting shell (3); and the fixing seat (16) is fixedly connected to the outer tube (2) via the mounting shell (3).

6. The side-driven jack according to claim 1 or 5, characterized in that: The fixing seat (16) comprises a body (17) and an end cover (25), wherein the end cover (25) is fixedly mounted on the body (17) by means of bolts, and the outer annular chamber (21) is located between the body (17) and the end cover (25).

7. The side-driven jack according to claim 1, characterized in that: The cross-sectional structure of the connecting section (6) is one of a regular polygon, an ellipse, a quincunx shape, and a concave polygon.

8. The side-driven jack according to claim 1, characterized in that: The fixing component also includes a spring (15), which is installed on the power input shaft (4) and is located between the movable sleeve (9) and the fixing seat (16).

9. The side-driven jack according to claim 8, characterized in that: The movable sleeve (9) is provided with an outer limiting hole (10), the outer limiting hole (10) is located at the inner end of the connecting hole (11), the diameter of the outer limiting hole (10) is larger than the diameter of the connecting hole (11), the fixed seat (16) is provided with an inner limiting hole (24), the inner limiting hole (24) is located between the cylindrical chamber (20) and the assembly hole (19), the diameter of the inner limiting hole (24) is smaller than the diameter of the cylindrical chamber (20), one end of the spring (15) is located in the outer limiting hole (10), and the other end of the spring (15) is located in the inner limiting hole (24).

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