Jacking mechanism with high positioning precision

Abstract

The utility model relates to a jacking mechanism with high positioning accuracy, the jacking mechanism is composed of a fixed seat (1), a lifting module (2) and a lead screw driving part (3), the fixed seat (1) is arranged on a ground cargo platform, the lifting module (2) and the lead screw driving part (3) are both arranged on the fixed seat (1), and the lead screw driving part (3) is arranged on the fixed seat (1). And under the driving action of the lead screw driving component (3), the jacking mechanism is driven to realize lifting motion. According to the jacking mechanism with the high positioning precision, no part is arranged above the lifting part, the maximization of the working space above the lifting part can be achieved, and meanwhile self-locking and high-precision transmission can be achieved through the trapezoid lead screw. The mechanism can realize precision refinement of the lead of the lead screw by changing the speed ratio of the driving synchronous pulley and the driven synchronous pulley, and has the advantages of small occupied space, easiness in maintenance and low processing cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to the head tube stake automation production field, concretely point to a kind of high positioning accuracy jacking mechanism. BACKGROUND

[0002] Jacking mechanism is a term in mechanical engineering, mainly used in self-elevating tower crane, for increasing and decreasing standard section. Jacking mechanism realizes the lifting function of crane through specific mechanical structure, such as jacking frame, jacking connecting rod mechanism, jacking motor etc. It is mainly applied in self-elevating tower crane, and the height of crane is adjusted by increasing and decreasing standard section, so as to adapt to different working requirements. This mechanism plays an important role in building construction, and can improve construction efficiency and safety.

[0003] In existing products, the jacking mechanism of precise positioning driven by servo adopts gear and rack, and its shortcomings are that the overall land occupation is large, jacking has no self-locking, jacking movable surface cannot leave effective working area space, and since the jacking mechanism driven by rigid chain has low positioning accuracy, it also has no self-locking function. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the shortcomings in the prior art, and provides a high positioning accuracy jacking mechanism.

[0005] In order to achieve the above purpose, the high positioning accuracy jacking mechanism of the utility model is as follows:

[0006] The high positioning accuracy jacking mechanism, which is mainly characterized by the following, is composed of a fixed seat, a lifting module and a lead screw driving part, wherein the fixed seat is arranged on a ground platform, the lifting module and the lead screw driving part are arranged on the fixed seat, and the lead screw driving part drives the jacking mechanism to realize lifting movement under the driving action.

[0007] Preferably, the lifting module includes a lifting frame, a straight guide rod and a contact block, wherein the lifting frame is installed on the straight guide rod, bearings are arranged on the straight guide rod to realize limiting treatment, and the contact block is arranged on the lifting frame to contact the tray or material to be jacked.

[0008] Preferably, the screw driving part comprises a screw nut fixing base fixed to the fixing base by bolts, wherein the upper and lower parts of the screw nut fixing base are provided with bearings, and the upper bearing is sequentially provided with a transition shaft, a driven synchronous pulley, a screw nut and a screw, the driven synchronous pulley and the screw nut are locked with the transition shaft by bolts, the locked transition shaft is inserted into the bearing hole of the screw nut fixing base, and the screw nut is axially limited and rotatably operated by locking the lock nut at the bottom of the screw nut fixing base.

[0009] Preferably, the screw driving part further comprises a reducer mounting base plate fixed to the fixing base by bolts, wherein the reducer mounting base plate is provided with a driving synchronous pulley, a reducer and a motor, the motor is mounted on the reducer, the reducer is used for mounting the driving synchronous pulley on the shaft, and the screw driving part is driven by the motor to drive the driven synchronous pulley, the screw nut and the screw to realize lifting movement.

[0010] Preferably, the upper end of the screw is further provided with a key groove, and the screw and the lifting frame are connected through the key groove and a nut, so as to limit the rotation freedom of the screw.

[0011] Preferably, the screw is a trapezoidal screw or a ball screw.

[0012] Preferably, the fixing base comprises a foot plate, a rigid frame, a linear bearing and a reducer tensioning plate, wherein the foot plate is mounted on the ground platform, the rigid frame is used for adjusting the levelness of the fixing base by bolts, the linear bearings are symmetrically arranged on the rigid frame, and the reducer tensioning plate is used for tensioning the reducer mounting base plate.

[0013] The high-precision positioning jacking mechanism has no any component above the lifting part, can maximize the upper operation space, and can realize self-locking, high-precision transmission and precision refinement by changing the speed ratio of the driving and driven synchronous pulleys and the lead of the screw. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 FIG. 1 is a structural schematic view of a fixing base of the high-precision positioning jacking mechanism.

[0015] Fig. 2 FIG. 2 is a structural schematic view of a lifting module of the high-precision positioning jacking mechanism.

[0016] Fig. 3 It is the structure schematic view of the screw driving part of the high positioning precision jacking mechanism of the utility model.

[0017] Fig. 4 It is the overall structure schematic view of the high positioning precision jacking mechanism of the utility model.

[0018] Fig. 5 It is another overall structure schematic view of the high positioning precision jacking mechanism of the utility model.

[0019] Reference signs

[0020] 1 fixed seat

[0021] 1-1 foot plate

[0022] 1-2 rigid frame

[0023] 1-3 linear bearing

[0024] 1-4 speed reducer tensioning plate

[0025] 2 lifting module

[0026] 2-1 lifting frame

[0027] 2-2 linear guide rod

[0028] 2-3 contact block

[0029] 3 screw driving part

[0030] 3-1 screw nut fixed seat

[0031] 3-2 speed reducer mounting seat plate

[0032] 3-2-1 driving synchronous pulley

[0033] 3-2-2 speed reducer

[0034] 3-2-3 motor

[0035] 3-3 bearing

[0036] 3-4 transition shaft

[0037] 3-5 driven synchronous pulley

[0038] 3-6 screw nut

[0039] 3-7 screw

[0040] 3-8 locking nut DETAILED DESCRIPTION

[0041] In order to more clearly describe the technical content of the utility model, the following further description is made in combination with specific embodiments.

[0042] Before embodiments according to the present application are explained in detail, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. It is also to be understood that the terminology could be interchangeable under the principles of the present application. Furthermore, there is no intention that the present application be limited to the exact drawings illustrated. In the following description, all orientations are described in view of the position of the items, as placed on the ground or on a platform, unless otherwise stated.

[0043] The high positioning precision jacking mechanism of the utility model, mainly by fixed seat 1 (foot plate 1-1, rigid frame 1-2, linear bearing 1-3, speed reducer tensioning plate 1-4), lifting module 2 (contact block 2-3, linear guide rod 2-2, lifting frame 2-1), screw drive component 3 (trapezoidal screw, screw nut 3-6, screw nut fixed seat 3-1, transition shaft 3-4, bearing 3-3, lock nut 3-8, synchronous pulley, synchronous belt, motor 3-2-3, speed reducer 3-2-2) are constituted.Electric motor 3-2-3 drives trapezoidal screw nut through synchronous pulley, makes trapezoidal screw realize ascending and descending movement, screw nut 3-6 is fixed in screw nut fixed seat 3-1 under the support of bearing, limits its up and down movement.

[0044] Please refer to Figs. 1 to 3 The high positioning precision jacking mechanism of the utility model, wherein, the jacking mechanism is composed of fixed seat 1, lifting module 2 and screw drive component 3, wherein, the fixed seat 1 is arranged on the ground platform, the lifting module 2 and the screw drive component 3 are both arranged on the fixed seat 1, and the screw drive component 3 drives the jacking mechanism to realize lifting movement under the driving action.

[0045] As a preferred embodiment of the utility model, the lifting module 2 includes lifting frame 2-1, linear guide rod 2-2 and contact block 2-3, wherein, the lifting frame 2-1 is installed on the linear guide rod 2-2, the linear guide rod 2-2 is provided with bearing for realizing limiting treatment, the contact block 2-3 is arranged on the lifting frame 2-1 and is used for contacting the tray or material to be jacked.

[0046] As the preferred embodiment of the utility model, the screw rod driving part 3 includes the screw rod nut fixing seat 3-1 which is fixed on the fixing seat 1 by bolts, wherein the upper and lower parts of the screw rod nut fixing seat 3-1 are provided with bearings 3-3, wherein the upper bearing is sequentially provided with a transition shaft 3-4, a driven synchronous pulley 3-5, a screw rod nut 3-6 and a screw rod 3-7, the driven synchronous pulley 3-5 and the screw rod nut 3-6 are locked with the transition shaft 3-4 by bolts, the locked transition shaft 3-4 is inserted into the bearing hole of the screw rod nut fixing seat 3-1, and the bottom of the screw rod nut fixing seat 3-1 is locked with a lock nut 3-8, so that the screw rod nut 3-6 is axially limited and rotatable.

[0047] As the preferred embodiment of the utility model, the screw rod driving part 3 further includes a speed reducer mounting seat plate 3-2 which is fixed on the fixing seat 1 by bolts, the speed reducer mounting seat plate 3-2 is provided with a driving synchronous pulley 3-2-1, a speed reducer 3-2-2 and a motor 3-2-3, wherein the motor 3-2-3 is installed on the speed reducer 3-2-2, the speed reducer 3-2-2 is used for installing the driving synchronous pulley 3-2-1 on the shaft, and the screw rod driving part 3 is driven by the motor 3-2-3, so that the driving synchronous pulley 3-2-1 drives the driven synchronous pulley 3-5, the screw rod nut 3-6 and the screw rod 3-7 to realize lifting movement.

[0048] As the preferred embodiment of the utility model, the upper end of the screw rod 3-7 is further provided with a key groove, the screw rod 3-7 and the lifting frame 2-1 are connected through the key groove and the nut, so as to limit the rotation freedom degree of the screw rod 3-7.

[0049] As the preferred embodiment of the utility model, the screw rod 3-7 is a trapezoidal screw rod or a ball screw.

[0050] As the preferred embodiment of the utility model, the fixing seat 1 includes a foot plate 1-1, a rigid frame 1-2, a linear bearing 1-3 and a speed reducer tensioning plate 1-4, wherein the foot plate 1-1 is installed on the ground platform, the rigid frame 1-2 is used for adjusting the levelness of the fixing seat 1 by bolts, the linear bearings 1-3 are symmetrically arranged on the rigid frame 1-2, and the speed reducer tensioning plate 1-4 is used for tensioning the speed reducer mounting seat plate 3-2.

[0051] The various components will be further described in detail below:

[0052] (1)Fixed seat 1: foot plate 1-1 is installed on the ground platform, rigid frame 1-2 is adjusted by bolt to adjust the levelness of the whole machine, and the reducer tensioning plate 1-4 can tension the reducer mounting seat plate 3-2 to ensure that the synchronous belt does not jump teeth, and the linear bearing is installed on the rigid frame 1-2 to realize the limiting function with the linear guide rod 2-2.

[0053] (2) Lifting module 2: lifting frame 2-1 and linear guide rod 2-2 are fixed, linear guide rod 2-2 is put into linear bearing to realize the purpose of limiting, and contact block 2-3 is installed on lifting frame 2-1 and contacts the tray or material that needs to be jacked.

[0054] (3) Screw drive component 3: screw nut fixing seat 3-1 and reducer mounting seat plate 3-2 are locked on fixed seat 1 by bolts, motor 3-2-3 is installed on reducer 3-2-2, reducer 3-2-2 is installed on driving synchronous pulley 3-2-1, and the whole is installed on reducer mounting seat plate 3-2. One bearing 3-3 is installed above and below screw nut fixing seat 3-1, screw nut 3-6 and driven synchronous pulley 3-5 are locked by bolts and transition shaft 3-4, the locked transition shaft 3-4 is inserted into the bearing hole, the lower part is locked by locking nut 3-8, the axial limiting and rotatable purposes of screw nut 3-6 are realized. The upper end of the trapezoidal screw is provided with a key groove, the trapezoidal screw 3-7 is connected with the lifting frame 2-1 by using the key groove and nut, and the rotation freedom of the trapezoidal screw is limited. Under the drive of motor 3-2-3, driving synchronous pulley 3-2-1 drives driven synchronous pulley 3-5 and screw nut 3-6, and the trapezoidal screw realizes lifting movement.

[0055] It can be understood that, in practical application, the implementation of the technical scheme is not limited to the above technical scheme, and the following alternative schemes are also included:

[0056] (1) The trapezoidal screw of the technical scheme can be replaced by a ball screw;

[0057] (2) The synchronous belt drive of the technical scheme can be replaced by a chain wheel and chain, a V-shaped wheel and a V-shaped belt, etc.

[0058] (3) The linear bearing and the linear guide rod of the technical scheme can be replaced by a roller guide and a ball linear guide.

[0059] The high-precision jacking mechanism of the utility model has no any component above the lifting, can realize the maximization of the upper working space, meanwhile, the trapezoidal screw can realize self-locking and high-precision transmission. The mechanism can realize precision refinement by changing the speed ratio of the driving and driven synchronous pulleys and the lead of the screw, has the advantages of small occupied space, easy maintenance and low processing cost.

[0060] In this specification, the present application has been described with reference to specific embodiments thereof. It is, however, apparent that various modifications and changes can be made thereto without departing from the spirit and scope of the present application. Therefore, the specification and drawings should be considered in an illustrative, and not a restrictive, sense.

Claims

1. A high positioning accuracy jacking mechanism, characterized by, The jacking mechanism is composed of a fixed seat (1), a lifting module (2) and a screw driving component (3), wherein the fixed seat (1) is arranged on the ground platform, the lifting module (2) and the screw driving component (3) are arranged on the fixed seat (1), and the screw driving component (3) drives the jacking mechanism to realize lifting movement under the driving action. The lifting module (2) comprises a lifting frame (2-1), a linear guide rod (2-2) and a contact block (2-3), wherein the lifting frame (2-1) is installed on the linear guide rod (2-2), bearings are arranged on the linear guide rod (2-2) for limiting treatment, and the contact block (2-3) is arranged on the lifting frame (2-1) for contacting the tray or material to be jacked.

2. The high positioning accuracy jacking mechanism according to claim 1, characterized in that The screw driving component (3) comprises a screw nut fixing seat (3-1) which is fixed on the fixed seat (1) by bolts, wherein bearings (3-3) are arranged on the upper and lower parts of the screw nut fixing seat (3-1), the upper part bearings are sequentially provided with a transition shaft (3-4), a driven synchronous pulley (3-5), a screw nut (3-6) and a screw (3-7), the driven synchronous pulley (3-5) and the screw nut (3-6) are locked with the transition shaft (3-4) by bolts, the locked transition shaft (3-4) is inserted into the bearing hole of the screw nut fixing seat (3-1), and a lock nut (3-8) is used at the bottom of the screw nut fixing seat (3-1) to lock, so as to realize axial limiting and rotatable operation of the screw nut (3-6).

3. The high positioning accuracy jacking mechanism according to claim 2, wherein The screw driving component (3) further comprises a reducer mounting seat plate (3-2) which is fixed on the fixed seat (1) by bolts, the reducer mounting seat plate (3-2) is provided with a driving synchronous pulley (3-2-1), a reducer (3-2-2) and a motor (3-2-3) from top to bottom, wherein the motor (3-2-3) is installed on the reducer (3-2-2), the reducer (3-2-2) is used to install the driving synchronous pulley (3-2-1) on the shaft, and the screw driving component (3) is driven by the motor (3-2-3) to drive the driven synchronous pulley (3-5), the screw nut (3-6) and the screw (3-7) to realize lifting movement.

4. The high positioning accuracy jacking mechanism according to claim 2, wherein The upper end of the screw (3-7) is further provided with a key groove, the screw (3-7) and the lifting frame (2-1) are connected through the key groove and the nut, so as to limit the rotation freedom degree of the screw (3-7).

5. The high positioning accuracy jacking mechanism according to claim 2, wherein The screw (3-7) is a trapezoidal screw or a ball screw.

6. The high positioning accuracy jacking mechanism according to claim 3, wherein The fixed seat (1) includes a ground foot plate (1-1), a rigid frame (1-2), a linear bearing (1-3) and a reducer tensioning plate (1-4), wherein the ground foot plate (1-1) is installed on the ground platform, the rigid frame (1-2) is used for adjusting the levelness of the fixed seat (1) through bolts, the linear bearings (1-3) are symmetrically arranged on the rigid frame (1-2), and the reducer tensioning plate (1-4) is used for tensioning the reducer mounting seat plate (3-2).

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