Long nut reverse planetary roller screw

Abstract

The utility model discloses a long nut reverse type planetary roller lead screw, which comprises a long nut body, a lead screw mechanism and an extension nut, the lead screw mechanism and the extension nut are arranged in the long nut body, one end of the long nut body is fixedly connected with two inserting plates which are symmetrically arranged, the extension nut is provided with inserting grooves corresponding to the inserting plates, and the inserting plates are fixedly connected with the long nut body. The extension nut is provided with an insertion groove, the insertion plate is inserted into the insertion groove in a sliding mode, the extension nut is provided with a thread part, the thread part is provided with two openings which are symmetrically formed, the two openings communicate with the insertion groove, one end of each opening is fixedly connected with a swing piece, the swing pieces are provided with external threads matched with the thread part, and the extension nut is provided with an insertion groove. According to the long nut reverse type planetary roller lead screw, the length of the long nut body can be adjusted through the arrangement of the extension nut, the connection diversity is improved, the long nut reverse type planetary roller lead screw is suitable for application and popularization, and the extension nut is more convenient to fix through matched use of the abutting sleeve and the swing piece.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related product field of planetary roller screw, concretely to a long nut reverse type planetary roller screw. BACKGROUND

[0002] As a new type of linear transmission unit, the planetary roller screw pair is mainly composed of a roller, a screw and a nut, and the three are in multi-point contact, which is simple to install and maintain. Due to its high speed, high precision, heavy load, long time work in harsh conditions and other remarkable characteristics, it is widely used in precision instruments, numerical control machine tools, machining centers, industrial robots, injection molding machines, photoelectric equipment, medical devices and aerospace precision transmission occasions, and as one of the main key components of large thrust electromechanical actuators, it is widely used in missiles, unmanned aerial vehicles and other aerospace vehicles.

[0003] However, the length of the long nut in the existing planetary roller screw is fixed, and the length cannot be adjusted according to the needs during subsequent assembly, which reduces the assembly range and has defects. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a long nut reverse type planetary roller screw to solve the problems in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a long nut reverse type planetary roller screw, which comprises a long nut body, a screw mechanism installed inside the long nut body and an extension nut, one end of the long nut body is fixedly connected with two plug-in plates arranged symmetrically, the extension nut is provided with plug-in grooves corresponding to the plug-in plates, the plug-in plates are slidingly inserted into the plug-in grooves, the extension nut is provided with a threaded part, the threaded part is provided with two openings arranged symmetrically, the two openings are in communication with the plug-in grooves, one end of each opening is fixedly connected with an oscillating piece, the oscillating piece is provided with an external thread matched with the threaded part, one end of the oscillating piece is fixedly connected with a clamping block, the plug-in plate is provided with a clamping groove corresponding to the clamping block, and a pressing sleeve is threadedly sleeved on the threaded part.

[0006] Preferably, the outer side wall of the pressing sleeve is provided with multiple anti-skid lines arranged obliquely.

[0007] Preferably, one end of the pressing sleeve is fixedly sleeved with a positioning sleeve, the positioning sleeve is provided with multiple assembly holes, the outer side wall of the threaded part is fixedly connected with two stop blocks arranged symmetrically, and the positioning sleeve is fixedly screwed between the bolt and the stop block.

[0008] Preferably, the multiple clamping grooves on the plug-in plate are equidistantly arranged.

[0009] Preferably, the initial state between the oscillating piece and the opening is obliquely fixed.

[0010] Compared with the prior art, the long nut reverse type planetary roller screw has the beneficial effects that:

[0011] The long nut reverse type planetary roller screw has the beneficial effects that: the length of the long nut body can be adjusted through the setting of the extension nut, the diversity of connection is improved, and the extension nut is fixed more conveniently through the cooperation between the pressing sleeve and the swing piece. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 is a structure schematic view of a long nut reverse type planetary roller screw of the utility model;

[0013] Fig. 2 is a structure schematic view of a long nut reverse type planetary roller screw of the utility model;

[0014] Fig. 3 is a structure schematic view of a long nut reverse type planetary roller screw of the utility model.

[0015] In the figure: 1, long nut body; 2, screw mechanism; 3, extension nut; 4, insertion plate; 5, insertion slot; 6, threaded part; 7, opening; 8, swing piece; 9, clamping block; 10, clamping groove; 11, pressing sleeve; 12, positioning sleeve; 13, stop block; 14, bolt. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0017] In the description of the utility model, it should be explained that the positions or location relations indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "another end" and the like are the positions or location relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not indicative or suggestive of the devices or elements indicated must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicative or suggestive of relative importance.

[0018] In the description of the utility model, it is necessary to explain, unless there is definite stipulation and limitation, the term "installation", "set with", "connection" and the like should be understood broadly, for example, "connection", can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication inside two elements.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0019] Please refer to Figs. 1-3 The utility model provides an embodiment: a long nut reverse formula planetary roller screw, including long nut body 1, the screw mechanism 2 and extension nut 3 of installing in long nut body 1 inside, the fixed connection of two insertion boards 4 of symmetrical arrangement is established on the one end of long nut body 1, the insertion slot 5 corresponding with insertion board 4 is equipped with on extension nut 3, insertion board 4 is slidably inserted in insertion slot 5, the threaded portion 6 is equipped with on extension nut 3, the two openings 7 of symmetrical arrangement are equipped with on threaded portion 6, two openings 7 are communicated with insertion slot 5, the fixed connection of swing piece 8 is established on the one end of opening 7, the external thread matched with threaded portion 6 is equipped with on swing piece 8, the fixed connection of clamping block 9 is established on the inner wall of one end of swing piece 8, the clamping slot 10 corresponding with clamping block 9 is equipped with on insertion board 4, the threaded sleeve of resistance pressing sleeve 11 is connected on threaded portion 6, specifically, extension nut 3 can increase the length of long nut body 1 when subsequent use is needed, insertion board 4 on long nut body 1 is inserted into insertion slot 5 on extension nut 3, then resistance pressing sleeve 11 is rotated and moves at the nut portion on extension nut 3, at the same time, resistance pressing sleeve 11 will press swing piece 8, swing piece 8 moves in opening 7 to push clamping block 9 on one end to be clamped into corresponding clamping slot 10 on insertion board 4, so as to realize the position fixation of extension nut 3.

[0020] In the embodiment, the outer side wall of resistance pressing sleeve 11 is provided with multiple anti-skid lines arranged obliquely, which increases the friction force during rotation;One end of resistance pressing sleeve 11 is fixedly sleeved with positioning sleeve 12, the positioning sleeve 12 is provided with multiple assembly holes, the outer side wall of threaded portion 6 is fixedly connected with two stop blocks 13 arranged symmetrically, the positioning sleeve 12 is fixed by screwing between the stop block 13 and the bolt 14, and the bolt 14 is screwed into the positioning sleeve 12 and the stop block 13 to fix the position of the resistance pressing sleeve 11;Multiple clamping slots 10 on the insertion board 4 are equidistantly arranged;The initial state between swing piece 8 and opening 7 is obliquely fixed.

[0021] Working principle: the length of the long nut body 1 can be increased when needed in subsequent use by the extension nut 3, the plug-in plate 4 on the long nut body 1 is inserted into the plug-in slot 5 on the extension nut 3, then the rotating pressure sleeve 11 is moved at the nut part of the extension nut 3, at the same time the pressure sleeve 11 will press the swing piece 8, the swing piece 8 moves in the opening 7 to push the clamping block 9 on one end to be clamped into the corresponding clamping slot 10 on the plug-in plate 4 to realize the position fixation of the extension nut 3.

[0022] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A long nut reverse type planetary roller screw, comprising a long nut body (1), a screw mechanism (2) and an extension nut (3) installed inside the long nut body (1), characterized in that: One end of the long nut body (1) is fixedly connected with two symmetrically arranged plug plates (4), the extension nut (3) is provided with a plug slot (5) corresponding to the plug plate (4), the plug plate (4) is slidably inserted into the plug slot (5), the extension nut (3) is provided with a threaded portion (6), the threaded portion (6) is provided with two symmetrically arranged openings (7), the two openings (7) are communicated with the plug slot (5), one end of the opening (7) is fixedly connected with an oscillating piece (8), the oscillating piece (8) is provided with an external thread matched with the threaded portion (6), one end of the oscillating piece (8) is fixedly connected with a clamping block (9), the plug plate (4) is provided with a clamping slot (10) corresponding to the clamping block (9), the threaded portion (6) is threadedly sleeved with a pressing sleeve (11).

2. The long-nut reverse planetary roller screw of claim 1, wherein: The outer side wall of the pressing sleeve (11) is provided with a plurality of anti-skid lines arranged obliquely.

3. The long nut reverse planetary roller screw of claim 1, wherein: One end of the pressing sleeve (11) is fixedly sleeved with a positioning sleeve (12), the positioning sleeve (12) is provided with a plurality of assembly holes, the outer side wall of the threaded portion (6) is fixedly connected with two symmetrically arranged stop blocks (13), and the positioning sleeve (12) is threadedly fixed between the stop blocks (13) through bolts (14).

4. The long nut reverse planetary roller screw of claim 1, wherein: The plurality of clamping slots (10) on the plug plate (4) are equidistantly arranged.

5. The long nut reverse planetary roller screw of claim 1, wherein: The initial state between the oscillating piece (8) and the opening (7) is obliquely fixed.

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