Screw rod fixing structure and fixed shaft type screw rod motor with screw rod fixing structure
By using a machined lead screw fixing structure, combined with limit shims and PTFE material guide components, the problems of variability and insufficient service life of existing fixed shaft lead screw motors are solved, realizing a lead screw motor design with high flexibility and long service life.
Patent Information
- Application Number
- CN202520272185.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-02-20
AI Technical Summary
The existing fixed-shaft ball screw motor has shortcomings in terms of versatility and service life, especially the injection-molded guide sleeve and the tension guide sleeve, which have low versatility and are difficult to adapt to the changing usage environment.
The screw fixing structure is machined and includes an inner locking block, a guide component, an outer locking block, and a guide shaft. Through the cooperation of limiting shims, grooves and bosses, combined with the metal guide shaft and plastic guide component, the screw is fixed and moves linearly. The guide component is made of PTFE material to reduce friction, and the guide shaft can be fitted with adapter components as needed.
It improves the versatility and service life of the structure, reduces the impact of friction, provides overall strength and adaptability, and the stroke can be adjusted arbitrarily within a reasonable range.
Smart Images
Figure CN223885057U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a fixed shaft type screw rod motor, especially a screw rod fixing structure and a fixed shaft type screw rod motor with the screw rod fixing structure. BACKGROUND
[0002] The fixed shaft type screw rod motor is used for converting the torque output by the motor into linear motion, and the existing fixed shaft type structure generally has two types: one is injection molding guide shaft and injection molding guide sleeve; and the other is stretching guide shaft and injection molding guide sleeve.
[0003] The principle of the injection molding guide shaft and the injection molding guide sleeve is that the plastic guide sleeve and the plastic guide shaft are matched to limit the radial rotary motion of the guide shaft, so that the guide shaft realizes linear motion.
[0004] The principle of the stretching guide shaft and the injection molding guide sleeve is that the metal guide shaft and the plastic guide sleeve are matched to limit the radial rotary motion of the guide shaft, so that the guide shaft realizes linear motion.
[0005] The above two structures are related to the generation of various molds, and the general applicability of the injection molded products is low, which greatly limits the variability of the current use environment. INVENTION CONTENTS
[0006] The utility model discloses a flexible, long service life screw rod fixing structure and a fixed shaft type screw rod motor with the screw rod fixing structure, which overcome the defects of the prior art.
[0007] The utility model discloses a flexible, long service life screw rod fixing structure and a fixed shaft type screw rod motor with the screw rod fixing structure, which overcome the defects of the prior art.
[0008] According to one aspect of the utility model, a screw rod fixing structure is provided, which is used for fixing a screw rod, and the fixing structure is a machining formed structure, comprising an inner locking block, a guide piece, an outer locking block and a guide shaft, the inner locking block and the guide piece are sequentially installed on the outer locking block, and the screw rod is sequentially threaded through the inner locking block, the guide piece and the outer locking block and connected with the guide shaft in a matching mode.
[0009] As a preferred technical scheme, a limiting gasket is arranged between the screw rod and the guide shaft.
[0010] As a preferred technical scheme, the outer locking block is provided with a groove matched with the guide piece, and the guide piece is provided with a convex platform matched with the groove.
[0011] As a preferred technical scheme, the outer locking block is provided with a first internal thread matched with the inner locking block.
[0012] As a preferred technical scheme, the guide shaft is provided with a second internal thread matched with the screw rod.
[0013] The inner locking block is fixed with the guide piece.
[0014] The guide shaft is a component made by processing a flat position of a metal rod.
[0015] The guide piece is a plastic guide piece.
[0016] The plastic guide piece is a component made of PTFE material.
[0017] According to another aspect of the utility model, a fixed shaft type screw rod motor with screw rod fixing structure is provided, which comprises a motor body, a front end cover, a stator, a rotor and a hollow shaft.
[0018] Compared with the prior art, the utility model has the following advantages:
[0019] 1) The screw rod fixing structure is made by machining process, which improves the variability of the structure.
[0020] 2) The plastic guide piece is made of self-lubricating and easy-to-process material, such as PTFE-containing material, which can reduce the influence of friction and improve the service life.
[0021] 3) The shaft part of the guide shaft can add adaptive components as needed, and even can be made into a whole with the added adaptive components to provide overall strength and adaptability.
[0022] 4) The use stroke of the utility model can be adjusted within a reasonable range. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0024] Figure 2 It is a schematic diagram of the structure of the inner locking block, the guide piece and the outer locking block of the utility model;
[0025] Figure 3 It is a schematic diagram of the exploded structure of the screw rod fixing structure of the utility model;
[0026] Figure 4 It is a schematic diagram of the cross-sectional structure of the screw rod fixing structure of the utility model;
[0027] Figure 5 It is a schematic diagram of the cross-sectional structure of the fixed shaft type screw rod motor of the utility model;
[0028] Fig. 6(a) is a schematic diagram of the main structure of the guide piece of the utility model;
[0029] Figure 6(b) is a three-dimensional structural schematic diagram of the guide component of this utility model;
[0030] Figure 7(a) is a three-dimensional structural diagram of the external locking block of this utility model;
[0031] Figure 7(b) is a schematic diagram of the main structure of the external locking block of this utility model;
[0032] Figure 7(c) is a cross-sectional view of the external locking block of this utility model;
[0033] Figure 8(a) is a schematic diagram of the main structure of the internal locking block of this utility model;
[0034] Figure 8(b) is a three-dimensional structural diagram of the internal locking block of this utility model;
[0035] 1 is the lead screw, 2 is the limit washer, 3 is the inner locking block, 4 is the guide component, 5 is the outer locking block, 6 is the guide shaft, 7 is the lead screw fixing structure, 8 is the motor body, 9 is the front cover, 10 is the stator, 11 is the rotor, and 12 is the hollow shaft. Detailed Implementation
[0036] 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, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.
[0037] Example 1
[0038] like Figures 2-4 As shown, a lead screw fixing structure is used to fix a lead screw 1. The fixing structure is a machined structure, including an inner locking block 3, a guide member 4, an outer locking block 5, and a guide shaft 6. The inner locking block 3 and the guide member 4 are sequentially installed on the outer locking block 5. The lead screw 1 passes through the inner locking block 3, the guide member 4, and the outer locking block 5 in sequence and then connects with the guide shaft 6. A limiting washer 2 is provided between the lead screw 1 and the guide shaft 6.
[0039] All components of this structure are machined, so that the overall dimensions can be adjusted arbitrarily according to different usage needs.
[0040] like Figure 2 As shown in Figures 6 and 7, the outer locking block and the plastic guide are fitted with a boss and groove structure, and the inner locking block is used for compression and fixation.
[0041] The axial displacement of the plastic guide is mainly fixed by the inner locking block, as shown in Figures 8(a)-8(b) The circumferential and radial displacement is mainly fixed by the mortise and tenon structure between the inner part of the outer locking block and the plastic guide.
[0042] The flat position of the metal rod is processed as the guide shaft.
[0043] The guide shaft and the screw rod are connected by the inner and outer threads, as the shaft assembly, and the connecting part of the guide shaft and the screw rod has a limiting gasket.
[0044] The cooperation of the shaft assembly and the locking block assembly makes the shaft assembly perform linear motion in the running process due to the limitation of the circumferential and radial motion.
[0045] The plastic guide is made of a material containing PTFE and other self-lubricating materials to reduce wear and provide service life.
[0046] Embodiment 2
[0047] As shown in Figure 5 The utility model discloses a fixed shaft type screw motor with screw rod fixing structure, which comprises a motor body 8, a front end cover 9, a stator 10, a rotor 11 and a hollow shaft 12.
[0048] The utility model discloses a fixed shaft type screw motor, which is used for converting the torque output by the motor into linear motion. The motor comprises a driving unit in the form of a rotor rotating under the action of electric energy, a screw rod as a driven unit in the form of a hollow shaft, and inner and outer locking blocks for fixing and preventing rotation of the screw rod, so that the screw rod can realize linear motion.
[0049] The above description is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this. Any skilled person in the technical field can easily think of various equivalent modifications or replacements within the technical range disclosed by the utility model, and these modifications or replacements should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.
Claims
1. A structure for fixing a lead screw (1), characterized by comprising: The fixed structure is a machining formed structure, comprising an inner locking block (3), a guide piece (4), an outer locking block (5) and a guide shaft (6), the inner locking block (3) and the guide piece (4) are sequentially installed on the outer locking block (5), the screw rod (1) is sequentially threaded through the inner locking block (3), the guide piece (4) and the outer locking block (5) and is connected with the guide shaft (6) in a matching mode.
2. The structure of claim 1, wherein A limiting gasket (2) is arranged between the screw rod (1) and the guide shaft (6).
3. The structure of claim 1, wherein The outer locking block (5) is provided with a groove matched with the guide piece (4), and the guide piece (4) is provided with a convex platform matched with the groove.
4. The structure of claim 1, wherein The outer locking block (5) is provided with a first inner thread matched with the inner locking block (3).
5. The structure of claim 1, wherein The guide shaft (6) is provided with a second inner thread matched with the screw rod (1).
6. The structure of claim 1, wherein The inner locking block (3) is fixed with the guide piece (4).
7. The structure of claim 1, wherein The guide shaft (6) is a part made by machining a flat position of a metal rod.
8. The structure of claim 1, wherein The guide piece (4) is a plastic guide piece.
9. The structure of claim 8, wherein The plastic guide piece is a part made of PTFE material.
10. A fixed-shaft screw motor with a screw rod fixing structure, comprising a motor body (8), a front end cover (9), a stator (10), a rotor (11) and a hollow shaft (12), characterized in that, The motor further comprises the screw rod fixing structure (7) in any one of claims 1-9.