Spiral multi-stage jack

Abstract

The utility model relates to the technical field of jacks, and aims to solve the problems that an existing spiral jack is limited in lift, large in driving load, too large in size and inconvenient to use flexibly. The utility model provides a spiral multi-stage jack which comprises a shell, a driving mechanism and a telescopic mechanism. The telescopic mechanism is arranged in the shell; the telescopic mechanism comprises a first-stage moving assembly, a second-stage moving assembly and a third-stage moving assembly. The driving mechanism is connected with the bottom of the first-stage moving assembly. The top of the first-stage moving assembly extends towards the second-stage moving assembly. The end, away from the first-stage moving assembly, of the second-stage moving assembly extends towards the third-stage moving assembly. According to the spiral multi-stage jack, rapid and stable lifting can be achieved, the driving mechanism of the spiral multi-stage jack directly drives the bottom of the shell, the driving load caused by indirect transmission of too many auxiliary transmission assemblies is reduced, the overall size of the jack is reduced, and the jack can be flexibly transferred and used conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of jacks, and in particular to a spiral multi-stage jack. Background Art

[0002] A jack is a light and small lifting device that uses a rigid lifting piece as a working device to lift heavy objects through a small stroke of a top support or a bottom support claw. Its structure is light, strong, flexible and reliable, and it is easy to carry and easy to operate. In the prior art, a multi-level structure is usually set to increase the lifting range of the jack.

[0003] For example, the patent with publication number CN215886175U discloses a multi-stage electric threaded jack, which starts the motor to rotate the first gear, so that the first gear drives the second gear to rotate, and the second gear drives the third gear to rotate, that is, the first threaded barrel rotates, so that the second threaded barrel rotates and rises at the same time, thereby increasing the lift of the jack; and the locking tongue in the locking mechanism extends into the corresponding annular groove under the action of the spring, thereby playing a locking role;

[0004] However, since the core function of the jack is to support and lift, its stability must be ensured when increasing the lift levels. If a multi-stage threaded barrel is used in conjunction with a spring telescopic lock tongue for locking, there are problems of poor stability after locking, and a limited lift and the lowest efficiency. In addition, a pair of gears are used to drive, which not only easily leads to excessive load on the driving components during lifting and prone to failure, but also easily leads to excessive size of the jack.

[0005] Based on the above description, there is an urgent need for a screw-type multi-stage jack that can stably increase the lift. Utility Model Content

[0006] The utility model aims to provide a spiral multi-stage jack, aiming to solve the technical problems of the existing spiral jacks, such as limited lifting range, large driving load and too large volume to be flexible in use.

[0007] The embodiments of the present invention are implemented by the following technical solutions:

[0008] A spiral multi-stage jack comprises a shell, a driving mechanism, and a telescopic mechanism; the telescopic mechanism is arranged inside the shell; the telescopic mechanism comprises a primary moving assembly, a secondary moving assembly, and a tertiary moving assembly; the driving mechanism is connected to the bottom of the primary moving assembly; the top of the primary moving assembly extends toward the secondary moving assembly; and one end of the secondary moving assembly away from the primary moving assembly extends toward the tertiary moving assembly.

[0009] Preferably, the first-level moving assembly includes a first-level screw, a first-level screw sleeve, a first-level connecting shell and a first-level piston rod; the driving mechanism is connected to the first-level screw; the first-level screw sleeve is connected to the first-level screw; the first-level connecting shell is sleeved on the outside of the first-level screw sleeve and extends in the circumferential direction to be connected to the first-level piston rod; and multiple sets of first anti-rotation guide keys are provided between the first-level piston rod and the shell.

[0010] Preferably, the secondary moving assembly includes a secondary sleeve and a secondary screw; the end of the primary sleeve away from the driving mechanism extends toward the secondary screw; the secondary sleeve is connected to the end of the secondary screw close to the primary sleeve; and multiple sets of second anti-rotation guide keys are provided between the secondary sleeve and the primary sleeve.

[0011] Preferably, the secondary moving assembly further comprises a secondary connecting shell and a secondary piston rod; the secondary connecting shell is connected to the outside of the secondary screw sleeve and extends in the circumferential direction to be connected to the secondary piston rod.

[0012] Preferably, the three-stage moving assembly includes a three-stage screw, a three-stage screw sleeve, a three-stage connecting shell and a three-stage piston rod; the second-stage screw sleeve extends toward the third-stage screw at one end away from the first-stage screw sleeve; the third-stage screw sleeve is connected to the third-stage screw; the third-stage connecting shell is sleeved on the outside of the third-stage screw sleeve and extends in the circumferential direction to be connected to the third-stage piston rod; a plurality of sets of third anti-rotation guide keys are provided between the third-stage piston rod and the second-stage screw sleeve.

[0013] Preferably, one end of the primary screw away from the driving mechanism is connected to the secondary screw through multiple groups of first transmission keys.

[0014] Preferably, the secondary screw is provided with a transmission end away from the first transmission key; the transmission end is connected to the tertiary screw via multiple groups of second transmission keys.

[0015] Preferably, a primary guide sleeve is provided between the housing and the primary piston rod; the primary piston rod is provided at one end of the housing away from the driving mechanism.

[0016] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0017] The utility model drives the primary moving component, the secondary moving component and the secondary moving component simultaneously through a driving mechanism; wherein, the primary moving component of the driving mechanism moves toward the top outlet of the shell, and at the same time, the primary moving component drives the secondary moving component to move toward the top outlet of the shell, and similarly, the secondary moving component moves while driving the tertiary moving component to move toward the top outlet of the shell, so that the speed of the secondary moving component is faster than that of the primary moving component, and the tertiary moving component is faster than that of the secondary moving component, thereby realizing a fast and stable lift, and its driving mechanism drives directly at the bottom of the shell, reducing the driving load caused by indirect transmission of too many auxiliary transmission components, and also reducing the overall volume of the jack, so as to facilitate flexible transfer and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 for Figure 1 A magnified schematic diagram of the local A in the middle;

[0021] Figure 3 for Figure 1 Enlarged schematic diagram of part B in the middle.

[0022] Icon: 1-shell, 2-driving mechanism, 3-telescopic mechanism, 31-primary moving assembly, 311-primary screw, 312-primary screw sleeve, 313-primary connecting shell, 314-primary piston rod, 32-secondary moving assembly, 321-secondary screw, 322-secondary screw sleeve, 323-secondary connecting shell, 324-secondary piston rod, 33-third-stage moving assembly, 331-third-stage screw, 332-third-stage piston rod, 4-first anti-rotation guide key, 5-second anti-rotation guide key, 6-third anti-rotation guide key, 7-first guide sleeve, 8-first transmission key, 9-second transmission key. DETAILED DESCRIPTION

[0023] Example 1

[0024] See also Figures 1 to 3 The utility model provides the following technical solutions: a spiral multi-stage jack, which is suitable for improving the lifting range of the jack.

[0025] Specifically, Figure 1 and Figure 2 As shown, a spiral multi-stage jack includes a shell 1, a driving mechanism 2, and a telescopic mechanism 3; the telescopic mechanism 3 is arranged inside the shell 1; the telescopic mechanism 3 includes a primary moving component 31, a secondary moving component 32 and a tertiary moving component 33; the driving mechanism 2 is connected to the bottom of the primary moving component 31; the top of the primary moving component 31 extends toward the secondary moving component 32; and the end of the secondary moving component 32 away from the primary moving component 31 extends toward the tertiary moving component 33.

[0026] In this embodiment, the first-stage moving component 31, the second-stage moving component 32, and the third-stage moving component 32 are driven simultaneously by the driving mechanism 2; wherein, the first-stage moving component 31 of the driving mechanism 2 moves toward the top outlet of the shell 1, and at the same time, the first-stage moving component 31 drives the second-stage moving component 32 to move toward the top outlet of the shell 1, and similarly, the second-stage moving component 32 moves while driving the third-stage moving component 33 to move toward the top outlet of the shell 1, so that the speed of the second-stage moving component 32 is faster than that of the first-stage moving component 31, and the third-stage moving component 33 is faster than that of the second-stage moving component 32, thereby achieving a fast and stable lift, and its driving mechanism 2 drives directly at the bottom of the shell 1, reducing the driving load caused by indirect transmission of too many auxiliary transmission components, and also reducing the overall volume of the jack, so as to facilitate flexible transfer and use.

[0027] Specifically, Figure 2 and Figure 3 As shown, the primary moving assembly 31 includes a primary screw 311, a primary screw sleeve 312, a primary connecting shell 313 and a primary piston rod 314; the driving mechanism 2 is connected to the primary screw 311; the primary screw sleeve 312 is connected to the primary screw 311; the primary connecting shell 313 is sleeved on the outside of the primary screw sleeve 312 and extends in the circumferential direction to be connected to the primary piston rod 314; a plurality of first anti-rotation guide keys 4 are arranged between the primary piston rod 314 and the housing 1. The secondary moving assembly 32 includes a secondary screw sleeve 322 and a secondary screw 321; one end of the primary screw sleeve 312 away from the driving mechanism 2 extends toward the secondary screw 321; the secondary screw sleeve 322 is connected to one end of the secondary screw 321 close to the primary screw sleeve 312; a plurality of second anti-rotation guide keys 5 are arranged between the secondary screw sleeve 322 and the primary screw sleeve 312. The secondary moving assembly 32 further includes a secondary connecting shell 323 and a secondary piston rod 324; the secondary connecting shell 323 is connected to the outside of the secondary screw sleeve 322 and extends in the circumferential direction to be connected to the secondary piston rod 324. The tertiary moving assembly 33 includes a tertiary screw 331, a tertiary screw sleeve, a tertiary connecting shell 333 and a tertiary piston rod 334; one end of the secondary screw sleeve 322 away from the primary screw sleeve 312 extends toward the tertiary screw 331; the tertiary screw sleeve 332 is connected to the tertiary screw 331; the tertiary connecting shell 333 is sleeved on the outside of the tertiary screw sleeve 332 and extends in the circumferential direction to be connected to the tertiary piston rod 334; a plurality of sets of third anti-rotation guide keys 6 are provided between the tertiary piston rod 334 and the secondary screw sleeve 322.

[0028] In the present embodiment, the first-stage connecting shell 313, the second-stage screw sleeve 322 and the third-stage screw sleeve are all of the same structure, with only slight differences in size, which specifically include a shell sleeve and a connecting chassis; the shell sleeve is used to be sleeved on the outside of the screw sleeve to connect the screw sleeve with the piston rod, wherein the screw sleeve and the shell sleeve are slidably connected, that is, the screw rod is rotated by the driving mechanism 2, so that the screw sleeve moves forward along the rotation of the screw rod, and then the shell sleeve moves linearly toward the top outlet end of the shell body 1, and then the connecting chassis connected to the shell sleeve drives the piston rod to move linearly; wherein, the wall piston rod rotates, and the anti-rotation guide key is used to limit the rotation, and the anti-rotation guide key can be specifically a limiting groove block for the protrusion or convex strip on the outside of the piston rod to be embedded; in addition, the top of the shell sleeve is provided with a limiting groove for the lower screw to be embedded, so as to ensure that the screw is not easily deviated during the process of advancing the lower screw; in addition, in order to save space, considering the distance between the third-stage screw and the third-stage piston rod

[0029] In this embodiment, the driving mechanism 2 is a servo motor for driving the screw to rotate.

[0030] Specifically, Figure 2 and Figure 3 As shown, one end of the primary screw 311 away from the driving mechanism 2 is connected to the secondary screw 321 through multiple sets of first transmission keys 8. The secondary screw 321 is provided with a transmission end away from the first transmission key 8; the transmission end is connected to the tertiary screw 331 through multiple sets of second transmission keys 9. A primary guide sleeve 7 is provided between the housing 1 and the primary piston rod 314; the primary piston rod 314 is provided at one end of the housing 1 away from the driving mechanism 2.

[0031] In this embodiment, the first transmission key 8 and the second transmission key 9 are used to transmit the second screw 321 and the third screw 331, so as to facilitate transmission among the third screw 331, the second screw 321 and the primary screw 311; wherein, by providing a special-shaped primary guide sleeve 7 (such as Figure 3 ), which not only ensures the directionality of the piston rod during its linear motion and avoids the misalignment of the jack during the lifting process, but also ensures that the bottom of the piston rod at each level is blocked and limited after completing the lifting.

[0032] The specific implementation process is: the primary screw 311 is driven to rotate by the driving mechanism 2, and the primary screw 311 rotates while transmitting to the secondary screw 321 through the first transmission key 8, so that the secondary screw 321 rotates, and further the secondary screw 321 transmits to the tertiary screw 331 through the second transmission key 9, so that the tertiary screw 331 transmits; at the same time, the secondary screw 321 is pushed by the primary screw sleeve 312 so that the secondary screw 321 moves linearly toward the top outlet of the shell 1; similarly, the tertiary screw 331 is pushed by the secondary screw sleeve 322 so that the tertiary screw 331 moves linearly toward the top outlet of the shell 1, thereby driving the primary piston rod 314, the secondary piston rod 324, and the tertiary piston rod 332 to pass through the top outlet of the shell 1 at the same time, and the moving speeds of the primary piston rod 314, the secondary piston rod 324, and the tertiary piston rod 332 increase successively, thereby realizing that multiple piston rods can quickly complete the lift.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A screw-type multi-stage jack, comprising a housing (1) and a driving mechanism (2), characterized in that: The invention also comprises a telescopic mechanism (3); the telescopic mechanism (3) is arranged inside the shell (1); the telescopic mechanism (3) comprises a primary moving component (31), a secondary moving component (32) and a tertiary moving component (33); the driving mechanism (2) is connected to the bottom of the primary moving component (31); the top of the primary moving component (31) extends toward the secondary moving component (32); and one end of the secondary moving component (32) away from the primary moving component (31) extends toward the tertiary moving component (33).

2. The screw type multi-stage jack according to claim 1, characterized in that: The first-stage moving assembly (31) comprises a first-stage screw (311), a first-stage screw sleeve (312), a first-stage connecting shell (313) and a first-stage piston rod (314); the driving mechanism (2) is connected to the first-stage screw (311); the first-stage screw sleeve (312) is connected to the first-stage screw (311); the first-stage connecting shell (313) is sleeved on the outside of the first-stage screw sleeve (312) and extends in a circumferential direction to be connected to the first-stage piston rod (314); a plurality of first anti-rotation guide keys (4) are provided between the first-stage piston rod (314) and the housing (1).

3. The screw type multi-stage jack according to claim 2, characterized in that: The secondary moving assembly (32) comprises a secondary screw sleeve (322) and a secondary screw rod (321); one end of the primary screw sleeve (312) away from the driving mechanism (2) extends toward the secondary screw rod (321); the secondary screw sleeve (322) is connected to one end of the secondary screw rod (321) close to the primary screw sleeve (312); and a plurality of groups of second anti-rotation guide keys (5) are provided between the secondary screw sleeve (322) and the primary screw sleeve (312).

4. The screw type multi-stage jack according to claim 3, characterized in that: The secondary moving assembly (32) further comprises a secondary connecting shell (323) and a secondary piston rod (324); the secondary connecting shell (323) is connected to the outside of the secondary screw sleeve (322) and extends in the circumferential direction to be connected to the secondary piston rod (324).

5. The screw type multi-stage jack according to claim 4, characterized in that: The three-stage moving assembly (33) comprises a three-stage screw (331), a three-stage screw sleeve (332), a three-stage connecting shell (333) and a three-stage piston rod (334); one end of the two-stage screw sleeve (322) away from the one-stage screw sleeve (312) extends toward the three-stage screw (331); the three-stage screw sleeve (332) is connected to the three-stage screw (331); the three-stage connecting shell (333) is sleeved on the outside of the three-stage screw sleeve (332) and extends in the circumferential direction to be connected to the three-stage piston rod (334); a plurality of sets of third anti-rotation guide keys (6) are provided between the three-stage piston rod (334) and the two-stage screw sleeve (322).

6. The screw type multi-stage jack according to claim 5, characterized in that: One end of the primary screw (311) away from the driving mechanism (2) is connected to the secondary screw (321) via a plurality of sets of first transmission keys (8).

7. The screw type multi-stage jack according to claim 6, characterized in that: The secondary screw (321) is provided with a transmission end away from the first transmission key (8); the transmission end is connected to the tertiary screw (331) via a plurality of groups of second transmission keys (9).

8. The screw type multi-stage jack according to any one of claims 5 to 7, characterized in that: A guide sleeve (7) is provided between the housing (1) and the primary piston rod (314); the primary piston rod (314) is provided at an end of the housing (1) away from the driving mechanism (2).

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