CN216045275U

CN216045275U - Screw nut structure for lifting table

Info

Publication number: CN216045275U
Application number: CN202122248752.8U
Authority: CN
Inventors: 卢连苗; 陈罗辉; 谭建华; 张�焕
Original assignee: Nningbo Qiangsheng Electric Motor Co ltd
Current assignee: Nningbo Qiangsheng Electric Motor Co ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-03-15
Anticipated expiration: 2031-09-16

Abstract

The utility model discloses a screw nut structure for a lifting table, which comprises a screw rod, a screw nut matched with the screw rod and a hollow mandrel of which a sleeve is arranged outside the screw rod, wherein the screw nut comprises a main body part formed by splicing a first shell and a second shell left and right, a nut core seat is formed in the main body part, a nut core is arranged in the nut core seat, and a screw hole matched with the screw rod is formed in the nut core. The lead screw nut is changed into a split structure with the nut core and the main body part matched, the nut core is made of wear-resistant materials, other parts can be made of common materials, and the main body part is formed in a left-right splicing mode; and then effectively controlled material cost, human cost.

Description

Screw nut structure for lifting table

Technical Field

The utility model relates to the field of electric lifting columns, in particular to a screw nut structure of an electric lifting column.

Background

The existing lifting stand column structure for the lifting table comprises a hollow mandrel, a transmission screw, a first sleeve and a second sleeve, wherein external threads are arranged on the outer wall of the hollow mandrel, the transmission screw is located in the hollow mandrel and is provided with a driving end, the driving end is of a non-cylindrical structure, the hollow mandrel is provided with a non-circular inner hole, and the non-cylindrical structure and the non-circular inner hole are matched to enable the transmission screw to transmit driving force to the hollow mandrel so as to drive the hollow mandrel to rotate synchronously.

The upper portion of the first sleeve is fixedly connected with a first transmission nut, external threads on the hollow mandrel are in threaded fit with the first transmission nut, the second sleeve is sleeved outside the first sleeve, the upper portion of the second sleeve is fixedly connected with a second transmission nut, and the transmission screw is in threaded fit with the second transmission nut. Specifically, the second drive nut comprises a main body part and a lower end cover fixed below the main body part, and the lower end cover and the main body part are fixed into a whole through a fastener.

The structure of the second transmission nut needs to use wear-resistant materials because the main body part needs to be matched with the screw rod, which leads to the rise of the cost; in addition, the combination is very inconvenient due to the up-and-down fixing mode.

Based on the above problems, there is a need for improvements in the art.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a screw nut structure for a lifting table.

The utility model is realized by the following technical scheme: the utility model provides a lifting table is with screw-nut structure, includes the lead screw, with lead screw complex screw-nut and the cavity mandrel of external member outside the lead screw, its characterized in that: the screw rod nut comprises a main body part formed by splicing a first shell and a second shell left and right, a nut core seat is formed in the main body part, a nut core is arranged in the nut core seat, and a screw hole matched with a screw rod is formed in the nut core.

In the technical scheme, the nut core comprises a cylindrical nut core main body, a positioning convex ring is arranged at the front end of the nut core main body, and a groove matched with the positioning convex ring is arranged at the front end of the main body part, which is located at the nut core seat.

In the above technical solution, a bearing seat is formed in the main body portion, a bearing is fixed in the bearing seat, and a front end of the hollow spindle is rotatably supported by the bearing.

In the above technical scheme, the first housing and the second housing are fixed by matching through the positioning column and the positioning hole.

In the above technical solution, at least one of the first housing and the second housing is provided with a torsion spring buckle seat for positioning a torsion spring pin.

The utility model has the following beneficial effects: the lead screw nut is changed into a split structure with the nut core and the main body part matched, the nut core is made of wear-resistant materials, other parts can be made of common materials, and the main body part is formed in a left-right splicing mode; and then effectively controlled material cost, human cost.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is an exploded view of the feed screw nut.

Fig. 4 is a partial structural schematic diagram of the present invention.

Fig. 5 is an exploded view of a feed screw nut and an aluminum pipe fixed thereto in the present application.

Fig. 6 is a schematic view of the matching structure of the feed screw nut and the hollow shaft.

Detailed Description

The utility model is described in further detail below with reference to the following detailed description and accompanying drawings: referring to fig. 1 to 6, the feed screw nut structure for the lifting table comprises a feed screw 1, a feed screw nut 2 matched with the feed screw 1 and a hollow mandrel 3 sleeved outside the feed screw 1, wherein the feed screw nut 2 comprises a main body part formed by splicing a first shell 21 and a second shell 22 left and right, a nut core seat 23 is formed in the main body part, a nut core 24 is arranged in the nut core seat 23, and a screw hole matched with the feed screw 1 is formed in the nut core 24. In the structure, the nut core seat 23 can be made of wear-resistant materials, the first shell 21 and the second shell 22 can be made of common materials, and compared with a traditional integrated lead screw nut, the material cost and the labor cost can be effectively controlled.

Specifically, the nut core 24 includes a cylindrical nut core main body 24a, a positioning convex ring 24b is provided at the front end of the nut core main body 24a, a groove 25 which is matched with the positioning convex ring 24b is provided at the front end of the nut core seat 23 in the main body part, and the positioning convex ring 24b is clamped into the groove 25, so that the axial position of the nut core main body 24a in the feed screw nut can be limited.

Specifically, a bearing seat 26 is formed in the main body portion, a bearing 100 is fixed in the bearing seat 26, and the front end of the hollow spindle 3 is rotatably supported by the bearing 100. The first housing 21 and the second housing 22 are fixed to each other by a positioning column 101 and a positioning hole 102.

Further, the upper end of the hollow spindle 3 is sleeved with a torsion spring seat 4, a torsion spring 5 is sleeved outside the torsion spring seat 4, the torsion spring 5 comprises a torsion spring pin 5a, and at least one of the first shell 21 and the second shell 22 is provided with a torsion spring buckle seat 200 for positioning the torsion spring pin 5 a. The torsion spring pin 5a is limited by the torsion spring buckle column 200. The torsion spring 5 is used for providing braking for the hollow spindle 3, specifically, when the hollow spindle rotates, the torsion spring can contract or expand under the action of the friction force of the torsion spring seat 4, and when the torsion spring contracts, the torsion spring can tightly hold the hollow spindle to further generate a braking effect. In the above structure, the torsion spring buckle base 200 is disposed at the first housing or the second housing, so that the torsion spring 5 can be positioned and mounted quickly.

Referring to fig. 5, fig. 5 shows the feed screw nut 2 and the aluminum sleeve 6 fixed in cooperation therewith, and the feed screw nut 2 is fixed to the aluminum sleeve 6 in the following manner: specifically, the first shell 21 and the second shell 22 of the lead screw nut 2 are provided with press riveting points 300, and a part of the aluminum sleeve 6 opposite to the position of the press riveting points 300 is subjected to riveting to form a riveting portion, and the riveting portion is pressed against the position of the press riveting points 300 to fix the lead screw nut 2.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be appreciated by persons skilled in the art that the present invention is not limited by the embodiments described above. The foregoing embodiments and description of the utility model have been provided for the purposes of illustrating the principles of the utility model and is subject to various changes and modifications without departing from the spirit and scope of the utility model. Such variations and modifications are intended to be within the scope of the claimed invention.

Claims

1. The utility model provides a lead screw nut structure for lift table, includes lead screw (1), with lead screw (1) complex lead screw nut (2) and cavity mandrel (3) of external member outside lead screw (1), its characterized in that: the lead screw nut (2) comprises a main body part formed by splicing a first shell (21) and a second shell (22) left and right, a nut core seat (23) is formed in the main body part, a nut core (24) is arranged in the nut core seat (23), and a screw hole matched with the lead screw (1) is formed in the nut core (24).

2. A feed screw nut structure for a lifting table as claimed in claim 1, wherein: the nut core (24) comprises a cylindrical nut core main body (24 a), a positioning convex ring (24 b) is arranged at the front end of the nut core main body (24 a), and a groove (25) matched with the positioning convex ring (24 b) is arranged at the front end of the nut core seat (23) of the main body part.

3. A feed screw nut structure for a lifting table as claimed in claim 1, wherein: a bearing seat (26) is formed in the main body part, a bearing (100) is fixed in the bearing seat (26), and the front end of the hollow spindle (3) is rotatably supported by the bearing (100).

4. A feed screw nut structure for a lifting table as claimed in claim 1, wherein: the first shell (21) and the second shell (22) are mutually matched and fixed through a positioning column (101) and a positioning hole (102).

5. A feed screw nut structure for a lifting table as claimed in claim 1, wherein: and a torsion spring buckling seat (200) for positioning a torsion spring pin is arranged on at least one of the first shell (21) and the second shell (22).