Jacking machine

Abstract

The utility model provides a jacking machine, which relates to the technical field of jacking equipment and comprises an outer pipe, a supporting inner pipe, a lead screw pair, a driving device and an anti-friction separator. The exterior of the outer pipe can be connected with a jacked object; the supporting inner pipe is telescopically sleeved in the outer pipe; the lead screw pair comprises a nut fixedly arranged in the supporting inner pipe and a lead screw matched with the nut and partially stretching out of the supporting inner pipe, and the end, stretching out of the supporting inner pipe, of the lead screw is connected with the outer pipe. The driving device is in transmission connection with one end of the screw rod extending out of the supporting inner pipe; the friction reduction separator is disposed at one end of the outer tube away from the driving device and surrounds the support inner tube, so that the support inner tube and the outer tube are disposed at intervals to reduce friction. Therefore, the utility model has the advantages that the interference between the outer pipe and the supporting inner pipe can be reduced, and the operation of the carbon brush of the driving motor is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to jacking equipment technical field especially relates to a jacking machine. BACKGROUND

[0002] The jacking machine is a mechanical device for lifting heavy objects. It is widely used in automobile repair, construction, bridge maintenance, aerospace and any occasion where heavy objects need to be lifted safely and reliably.

[0003] The existing jacking machine usually includes an outer tube for connecting the jacked object, a supporting inner tube telescopically and sleeved in the outer tube, a screw rod pair connecting the outer tube and the supporting inner tube, the nut of the screw rod pair being fixed in the supporting inner tube, the screw rod of the screw rod pair being fixed to the outer tube through a bearing and a support seat, and a driving motor drivingly connected with the screw rod. In this way, the rotary motion of the screw rod can be converted into the linear motion of the nut, and the supporting inner tube is driven to make telescopic motion relative to the outer tube to lift or lower the jacked object. However, this technical solution also has some disadvantages. For example, when the jacking machine is inclined to lift the jacked object, or the inner and outer tubes are unevenly stressed, the outer tube and the supporting inner tube at the end far from the driving motor will be in contact, resulting in large contact friction, which causes wear of the outer tube and the supporting inner tube, affects the operation of the carbon brush of the driving motor, increases the current, and reduces the service life of the driving motor.

[0004] Therefore, a jacking machine that can reduce the interference between the outer tube and the supporting inner tube and does not affect the operation of the carbon brush of the driving motor needs to be designed. SUMMARY

[0005] The utility model discloses a jacking machine, which at least solves one of the above technical problems, has the advantages of reducing the interference between the outer tube and the supporting inner tube, and does not affect the operation of the carbon brush of the driving motor.

[0006] To achieve the above-mentioned purpose, the utility model provides a jacking machine, which comprises:

[0007] An outer tube, which is externally connected to the jacked object;

[0008] A supporting inner tube, which is telescopically and sleeved in the outer tube;

[0009] A screw rod pair, which comprises a nut fixed in the supporting inner tube and a screw rod matched with the nut and partially extending out of the supporting inner tube, one end of the screw rod extending out of the supporting inner tube being connected to the outer tube;

[0010] A driving device, which is drivingly connected to one end of the screw rod extending out of the supporting inner tube; and

[0011] A friction-reducing spacer is arranged on the outer tube away from the driving device and surrounds the supporting inner tube, so that the supporting inner tube is arranged at a distance from the outer tube to reduce friction.

[0012] Optionally, the friction-reducing spacer is a sliding bushing arranged on the outer tube in a detachable manner.

[0013] Optionally, the outer peripheral wall of the sliding bushing is uniformly and spacedly provided with limiting protrusions in the circumferential direction; the outer tube is provided at an end away from the driving device with a first notch extending to a free end in the axial direction and matching the shape of the limiting protrusions; and the sliding bushing is further provided with a fastener for fixing the sliding bushing to the outer tube.

[0014] Optionally, the end of the sliding bushing away from the driving device is provided with a stop rim surrounding and arranged away from the shaft center, for limiting the free end of the outer tube.

[0015] Optionally, the stop rim is provided with a second notch corresponding to the position of the limiting protrusions; and the sliding bushing is further provided with a bushing stop ring fixed to the outer periphery of the outer tube; the inner wall of the bushing stop ring is provided with a pressing block that can be slid into the second notch, the first notch and support and abut against the lower end of the limiting protrusion.

[0016] Optionally, the outer tube and the supporting inner tube are square tubes, and the sliding bushing is a square ring sleeve; and four limiting protrusions are correspondingly arranged on the four outer peripheral surfaces of the sliding bushing.

[0017] Optionally, the end of the supporting inner tube away from the driving device is further rotationally provided with a universal foot disc.

[0018] Optionally, the outer tube and the supporting inner tube are circular tubes, the sliding bushing is a circular ring sleeve, and the outer peripheral wall of the sliding bushing is uniformly and spacedly provided with clamping blocks in the circumferential direction; and the outer tube is provided at an end away from the driving device with a clamping opening matched with the clamping blocks.

[0019] Optionally, the sliding bushing is a plastic wear-resistant ring, the outer periphery of the sliding bushing is provided with four clamping blocks, and the sliding bushing is correspondingly provided with an opening extending in the axial direction corresponding to one of the clamping blocks.

[0020] Optionally, the outer periphery of the supporting inner tube is provided with an axially extending guide groove, and the outer tube is provided with a guide inner recess corresponding to the guide groove.

[0021] Compared with the prior art, the application has the following advantages:

[0022] The friction-reducing separator is arranged between the outer tube and the supporting inner tube to reduce the friction between the outer tube and the supporting inner tube, so that the outer tube and the supporting inner tube cannot directly contact each other and interference is avoided, the relative friction between the outer tube and the supporting inner tube is reduced, the abrasion between the outer tube and the supporting inner tube is reduced, the resistance to the rotation of the driving motor is reduced, the carbon brush of the driving motor can normally operate, and the service life of the driving motor is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the provided drawings without creative labor.

[0024] Figure 1 It is a structural schematic view of the embodiment one of the present application.

[0025] Figure 2 It is a top view of the embodiment one of the present application.

[0026] Figure 3 It is a sectional view along A-A in the embodiment one. Figure 2

[0027] Figure 4 It is a partial enlarged view of B in the embodiment one. Figure 3

[0028] Figure 5 It is a partial enlarged view of C in the embodiment one. Figure 3

[0029] Figure 6 It is a partial structural exploded schematic view of the embodiment one of the present application.

[0030] Figure 7 It is a partial enlarged view of D in the embodiment one. Figure 6

[0031] Figure 8 It is a structural schematic view of the sliding bushing of the embodiment one of the present application.

[0032] Figure 9 It is a structural schematic view of the bushing retaining ring of the embodiment one of the present application.

[0033] Figure 10 It is a structural schematic view of the embodiment two of the present application. ​​​​

[0034] Figure 11 This is a partial exploded view of the structure of Embodiment 2 of this utility model;

[0035] Figure 12 This is a schematic diagram of the sliding bushing of Embodiment 2 of this utility model.

[0036] Explanation of reference numerals in the attached figures

[0037] 100-lifting machine;

[0038] 1-Outer tube; a-First notch; b-Barrel; 11-Guide recess;

[0039] 2-Support inner tube; c-Guide groove;

[0040] 3-Screw assembly; 31-Nut; 32-Screw; 33-Bearing; 34-Support seat;

[0041] 41-Drive motor; 42-Gearbox; 43-Coupling;

[0042] 5-Sliding bushing; 51-Limiting protrusion; 52-Baffle; d-Second notch; 53-Clamping block; e-Opening;

[0043] 6-Bushel retaining ring; 61-Clamping block;

[0044] 7-Connectors;

[0045] 8-Fasteners;

[0046] 9-Universal feet. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] It should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "back," "side," and "circumferential" used in this utility model to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used to distinguish multiple parts or structures with the same or similar structures, and do not indicate any special limitation on the arrangement order or connection relationship.

[0049] Example 1

[0050] Please refer to Figures 1 to 9 This utility model provides a lifting machine 100 for lifting heavy objects. The lifting machine 100 includes: an outer tube 1, a supporting inner tube 2, a lead screw pair 3, a drive device, and a friction-reducing separator.

[0051] The outer tube 1 can be made of a material with high support strength, such as steel pipe, and the object to be supported (not shown in the figure) can be connected to its exterior. Specifically, the outer tube 1 can be connected to the object to be supported through the connector 7.

[0052] The inner support tube 2 can be telescopically fitted inside the outer tube 1; the inner support tube 2 can also be made of materials with high support strength, such as steel pipe.

[0053] The lead screw assembly 3 can be a ball screw assembly, including a nut 31 and a lead screw 32. The nut 31 is fixed inside the inner support tube 2. Specifically, the nut 31 is fixed at the end of the inner support tube 2 away from the support surface (not shown in the figure). The lead screw 32 cooperates with the nut 31 and partially extends out of the inner support tube 2. The end of the lead screw 32 extending out of the inner support tube 2 is connected to the outer tube 1. Optionally, the lead screw 32 is fixed to the end of the outer tube 1 away from the support surface via a bearing 33 and a support seat 34.

[0054] The drive unit is connected to one end of the lead screw 32 that extends out of the inner support tube 2. Optionally, the drive unit is a drive motor 41, which is mounted on the outer tube 1 through a reduction gearbox 42 and is connected to the lead screw 32 through the reduction gearbox 42 and a coupling 43.

[0055] The friction-reducing separator is disposed at the end of the outer tube 1 away from the drive device and surrounds the inner tube 2, so that the inner tube 2 and the outer tube 1 are spaced apart to reduce friction.

[0056] Thus, even when the lifting machine 100 tilts to lift the object or when the inner and outer tubes 1 are subjected to uneven force, the outer tube 1 at the end away from the drive motor 41 and the supporting inner tube 2 will not directly contact each other due to the separation of the friction-reducing separator, thus avoiding interference. This reduces the relative friction between the outer tube 1 and the supporting inner tube 2, reduces the wear of the outer tube 1 and the supporting inner tube 2, and reduces the resistance to the rotation of the drive motor 41, allowing the carbon brushes of the drive motor 41 to operate normally, thereby extending the service life of the drive motor 41.

[0057] Alternatively, please refer to Figure 5 and Figure 6 In this embodiment, the friction-reducing separator is a sliding bushing 5 detachably mounted on the outer tube 1. The inner wall of the sliding bushing 5 is self-lubricating; therefore, even if the inner wall of the sliding bushing 5 slides in contact with the supporting inner tube 2, the friction between the inner wall of the sliding bushing 5 and the supporting inner tube 2 is very small, resulting in minimal resistance to the rotation of the drive motor 41 and thus not affecting the operation of the carbon brushes of the drive motor 41. Of course, in other embodiments, the friction-reducing separator can also be a ring of ball bearings (not shown in the figure) rolling on the inner wall of the outer tube 1. In this way, the sliding friction between the outer tube 1 and the supporting inner tube 2 can be transformed into rolling friction, which can also greatly reduce the friction between the outer tube 1 and the supporting inner tube 2; no specific limitation is made here.

[0058] To achieve detachable assembly between the sliding bushing 5 and the supporting inner tube 2, optionally, please refer to... Figures 6 to 8 In this embodiment, the outer peripheral wall of the sliding bushing 5 is uniformly and spaced along the circumference of the limiting protrusions 51; the end of the outer tube 1 away from the driving device is provided with a first notch a that matches the shape of the limiting protrusions 51 and extends axially to the free end; the lifting machine 100 also includes fasteners 8 for fixing the sliding bushing 5 to the outer tube 1. Thus, during assembly, the first notch a at one end of the outer tube 1 can be aligned with the limiting protrusions 51, slid into place, and then fixed by the fasteners 8.

[0059] To make the assembly of the outer tube 1 and the sliding bushing 5 more stable, optionally, please refer to... Figure 8 In this embodiment, the end of the sliding bushing 5 away from the driving device has a flange 52 that surrounds and extends away from the axis to limit the free end of the outer tube 1. Furthermore, the length of the flange 52 extending away from the axis is equal to the thickness of the outer tube 1, so that the outer tube 1 and the sliding bushing 5 are of the same size after assembly.

[0060] To further improve the assembly stability of the outer tube 1 and the sliding bushing 5, optionally, please refer to... Figures 6 to 9In this embodiment, the flange 52 is provided with a second notch d corresponding to the position of the limiting protrusion 51; the lifting machine 100 also includes a bushing retaining ring 6 sleeved and fixed to the outer periphery of the outer tube 1. The inner wall of the bushing retaining ring 6 has a retaining block 61 that can slide into the second notch d and the first notch a and support and abut against the lower end of the limiting protrusion 51. Thus, during assembly, the first notch a at one end of the outer tube 1 is aligned with the limiting protrusion 51, and after sliding into place, the sliding bushing 5 is slid from the free end along the second notch d and the first notch a to abut against the lower end of the limiting protrusion 51, and then the outer tube 1, the sliding bushing 5, and the bushing retaining ring 6 are fixed together by the fasteners 8.

[0061] Alternatively, please refer to Figure 6 and Figure 8 In this embodiment, the outer tube 1 and the supporting inner tube 2 are both square tubes, and the sliding bushing 5 is a square ring; the four limiting protrusions 51 are respectively arranged on the four outer peripheral surfaces of the sliding bushing 5.

[0062] To ensure that the inner tube 2 can be stably and directionally adjusted for support on the support surface, optionally, please refer to... Figure 1 In this embodiment, the end of the inner tube 2 that is away from the drive device is also rotatably equipped with a universal foot plate 9.

[0063] Example 2

[0064] This embodiment is basically the same as Embodiment 1, except that it achieves the specific shapes of the outer tube 1, the supporting inner tube 2, and the sliding bushing 5, as well as the connection method between the sliding bushing 5 and the outer tube 1. Specifically, please refer to... Figures 10 to 12 In this embodiment, both the outer tube 1 and the supporting inner tube 2 are circular tubes. The sliding bushing 5 is a circular ring, and its outer circumferential wall is uniformly and spaced with locking blocks 53. The end of the outer tube 1 away from the driving device is provided with a locking slot b that engages with the locking block 53. That is, the sliding bushing 5 and the outer tube 1 are detachably connected by locking.

[0065] To achieve the snap-fit ​​connection between the sliding bushing 5 and the outer tube 1, optionally, please refer to... Figure 11 and Figure 12 In this embodiment, the sliding bushing 5 is a plastic wear-resistant ring with four locking blocks 53 on its outer periphery, and one of the locking blocks 53 has an opening e extending axially. Since the sliding bushing 5 has an opening e extending axially and is made of wear-resistant plastic, it has a certain elasticity. Thus, when a compressive force is applied to both sides of the opening e of the sliding bushing 5, the sliding bushing 5 closes along the opening e, thereby reducing the circumference of the sliding bushing 5 to facilitate fitting into the outer tube 1. Then, the sliding bushing 5 is released, and the locking blocks 53 of the sliding bushing 5 can be engaged in the locking slot b to achieve a snap-fit ​​fixation.

[0066] To improve stability during the telescopic movement of the outer tube 1 and the supporting inner tube 2, optionally, please refer to... Figure 11 In this embodiment, the outer periphery of the inner tube 2 has an axially extending guide groove c, and the outer tube 1 is provided with a guide recess 11 corresponding to the guide groove c.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the substance of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A lifting machine, characterized in that, include: The outer tube (1) can be connected to the object being topped; The inner tube (2) is retractable and sleeved inside the outer tube (1); The lead screw assembly (3) includes: a nut (31) fixed inside the inner support tube (2), and a lead screw (32) that cooperates with the nut (31) and partially extends out of the inner support tube (2), wherein one end of the lead screw (32) extending out of the inner support tube (2) is connected to the outer tube (1); The drive device is connected to one end of the lead screw (32) extending out of the support inner tube (2); and, A friction-reducing separator is disposed at the end of the outer tube (1) away from the driving device and around the supporting inner tube (2) so that the supporting inner tube (2) and the outer tube (1) are spaced apart to reduce friction.

2. The lifting machine as described in claim 1, characterized in that, The friction-reducing separator is a sliding bushing (5) that is detachably mounted on the outer tube (1).

3. The lifting machine as described in claim 2, characterized in that, The outer peripheral wall of the sliding bushing (5) is uniformly and spaced along the circumference with limiting protrusions (51); the outer tube (1) is provided with a first notch (a) at the end away from the driving device that matches the shape of the limiting protrusion (51) and extends along its axial direction to the free end; it also includes fasteners (8) for fixing the sliding bushing (5) and the outer tube (1).

4. The lifting machine as described in claim 3, characterized in that, The sliding bushing (5) has a flange (52) at the end away from the drive device, which surrounds and is arranged in a direction away from the axis, for limiting the free end of the outer tube (1).

5. The lifting machine as described in claim 4, characterized in that, The flange (52) is provided with a second notch (d) corresponding to the position of the limiting protrusion (51); it also includes a bushing retaining ring (6) sleeved and fixed on the outer periphery of the outer tube (1); the inner wall of the bushing retaining ring (6) has an abutting block (61) that can slide into the second notch (d) and the first notch (a) and support and abut against the lower end of the limiting protrusion (51).

6. The lifting machine as described in claim 3, characterized in that, The outer tube (1) and the inner supporting tube (2) are both square tubes, and the sliding bushing (5) is a square ring; the four limiting protrusions (51) are respectively arranged on the four outer peripheral surfaces of the sliding bushing (5).

7. The lifting machine as described in any one of claims 1-6, characterized in that, The end of the inner support tube (2) away from the drive device is also rotatably equipped with a universal foot plate (9).

8. The lifting machine as described in claim 2, characterized in that, The outer tube (1) and the inner supporting tube (2) are both circular tubes. The sliding bushing (5) is a circular ring and its outer circumferential wall is uniformly and spaced with locking blocks (53). The outer tube (1) is provided with a locking slot (b) that engages with the locking block (53) at one end away from the driving device.

9. The lifting machine as described in claim 8, characterized in that, The sliding bushing (5) is a plastic wear-resistant ring with four said locking blocks (53) on its outer periphery, and each of the said locking blocks (53) has an opening (e) extending axially.

10. The lifting machine as described in claim 8, characterized in that, The outer periphery of the inner support tube (2) has an axially extending guide groove (c), and the outer tube (1) is provided with a guide recess (11) corresponding to the guide groove (c).

Images