Improved self-locking ball screw structure

Abstract

The utility model discloses an improved self-locking ball screw structure, and relates to the technical field of ball screws. The ball screw comprises a ball screw body. The ball screw body comprises a screw rod, a transmission shaft installed on the peripheral side of the screw rod in a matched mode, a gear ring matched with the peripheral side of the end of the transmission shaft, an end cover connected with the end of the transmission shaft, a shell arranged outside the gear ring and the end cover in a sleeving mode, and installation bases fixed to the two ends of the shell. A screw hole for mounting a fastener is formed in the upper side of the mounting seat, a self-locking knob is mounted on the side surface of the mounting seat in a thread fit manner, and the transmission shaft comprises a screw rod, gear shafts integrally arranged at the two ends of the screw rod, and shaft ends fixed at the end parts of the gear shafts. According to the utility model, the self-locking knob is arranged, so that the whole system is kept at one position by utilizing friction force under the condition that an additional locking mechanism is not needed, and when the self-locking knob is tightened, the screw rod is pressed, so that the mounting seat and an external structure connected with the mounting seat are prevented from unexpected movement under the condition of no driving effect.

Description

Technical Field

[0001] This utility model belongs to the field of ball screw technology, and in particular relates to an improved self-locking ball screw structure. Background Technology

[0002] Ball screws are a precision transmission device widely used in the field of mechanical engineering, especially in applications where rotary motion needs to be converted into linear motion, such as CNC machine tools, robots, and automated production lines.

[0003] Traditional ball screws typically lack good self-locking performance, meaning that without external drive, the nut (or nut seat) may slide along the screw due to load or other external forces, causing an unexpected change in position. To achieve self-locking, some designs add additional locking mechanisms, such as electromagnetic locks, hydraulic locks, or mechanical locks. These additional components not only increase the complexity and manufacturing cost of the system but may also affect the overall compactness and reliability.

[0004] To address these issues, we provide an improved self-locking ball screw structure. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is an improved self-locking ball screw structure, including a ball screw body. The ball screw body includes a lead screw, a drive shaft adapted to be installed around the lead screw, a gear ring that mates with the end of the drive shaft, an end cap connected to the end of the drive shaft, a housing sleeved outside the gear ring and the end cap, and mounting seats fixed to both ends of the housing.

[0007] The mounting base has screw holes on its upper side for fastener installation, and a self-locking knob is threadedly fitted on the side of the mounting base.

[0008] The present invention is further configured such that the lead screw passes through the middle of the mounting base, and the periphery of the lead screw cooperates with the threaded inner end of the self-locking knob.

[0009] The present invention is further configured such that the transmission shaft includes a screw, a gear shaft integrally disposed at both ends of the screw, and a shaft end fixed to the end of the gear shaft.

[0010] The present invention is further configured such that the screw is adapted to the periphery of the lead screw, the gear shaft is adapted to the inner side of the gear ring, and the shaft end passes through the end cover.

[0011] The present invention is further configured such that the toothed ring is fixed to the end cap, and the toothed ring and the circumference of the end cap are movably fitted against the inner wall of the housing.

[0012] The present invention is further configured such that the end of the lead screw passes through the middle of the end cap, and there is a gap between the lead screw and the end cap.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model uses a self-locking knob to keep the entire system in one position by means of friction without the need for an additional locking mechanism. When the self-locking knob is tightened, it presses against the lead screw, thereby preventing the mounting base and the external structure connected to it from moving unexpectedly without a driving force.

[0015] 2. This utility model effectively converts rotary motion into linear motion through the cooperation between the lead screw and the transmission shaft, ensuring the efficiency of power transmission. Furthermore, precise linear displacement can be achieved by accurately controlling the rotation of the lead screw. The gear ring and the end cover rotate synchronously, and the lead screw is not directly fixed to the end cover or mounting base, which helps to reduce unnecessary rotational motion and ensures the stability and reliability of the system.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram showing the fit between the gear ring, end cap, and drive shaft in this utility model.

[0020] Figure 3 This is a schematic diagram of the fit between the lead screw and the drive shaft in this utility model.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 100. Ball screw body; 101. Mounting base; 101a. Screw hole; 101b. Self-locking knob; 102. Housing; 103. Screw; 104. Drive shaft; 104a. Screw; 104b. Gear shaft; 104c. Shaft end; 105. Gear ring; 106. End cover. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0024] Example

[0025] Please see Figure 1-3 This utility model is an improved self-locking ball screw structure, including a ball screw body 100. The ball screw body 100 includes a lead screw 103, a drive shaft 104 adapted to be installed around the lead screw 103, a gear ring 105 that mates with the end of the drive shaft 104, an end cap 106 connected to the end of the drive shaft 104, a housing 102 sleeved on the outside of the gear ring 105 and the end cap 106, and mounting seats 101 fixed at both ends of the housing 102. Under the action of external rotation drive, the lead screw 103 rotates along the axial direction, and then drives the rotational displacement of the whole consisting of the gear ring 105 and the end cap 106 through the drive shaft 104 around its periphery, further realizing the linear drive of the whole consisting of the housing 102 and the mounting seat 101.

[0026] The mounting base 101 has a screw hole 101a on its upper side for fastener installation, and a self-locking knob 101b is threadedly fitted on the side of the mounting base 101. The lead screw 103 passes through the middle of the mounting base 101, and the periphery of the lead screw 103 cooperates with the threaded inner end of the self-locking knob 101b. The mounting base 101 serves as the moving end of the ball screw structure and the connection end with the external structure. Under the combined action of all the structures of the ball screw body 100, it moves along the direction of the lead screw 103 to achieve linear drive of the external structure. When the inner end of the self-locking knob 101b abuts against the lead screw 103, the two achieve self-locking of the ball screw body 100 under friction, preventing the mounting base 101 from moving without driving action.

[0027] Specifically, the drive shaft 104 includes a screw 104a, a gear shaft 104b integrally disposed at both ends of the screw 104a, and a shaft end 104c fixed to the end of the gear shaft 104b. The screw 104a is adapted to the circumference of the lead screw 103, the gear shaft 104b is adapted to the inner side of the gear ring 105, and the shaft end 104c passes through the end cover 106. The cooperation between the screw 104a and the lead screw 103 is used to transmit the torque of the lead screw 103 to the entire drive shaft 104, and under the cooperation of the gear shaft 104b and the gear ring 105, the drive transmission of the gear ring 105 and the end cover 106 as a whole is realized.

[0028] Furthermore, the gear ring 105 is fixed to the end cap 106, and the gear ring 105 and the end cap 106 are movably fitted against the inner wall of the housing 102. The end of the lead screw 103 passes through the middle of the end cap 106, and there is a gap between the lead screw 103 and the end cap 106. The gear ring 105 and the end cap 106 are fixed so that they rotate synchronously. Since the lead screw 103 is not directly fixed to the end cap 106 and the mounting base 101, when the gear ring 105 and the end cap 106 rotate and move along the direction of the lead screw 103, the housing 102 has a tendency to rotate under friction. With the help of the external positioning structure, the housing 102 and the mounting base 101 can move linearly back and forth without rotation.

[0029] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An improved self-locking ball screw structure, comprising a ball screw body (100), characterized in that: The ball screw body (100) includes a screw (103), a drive shaft (104) adapted to be installed around the screw (103), a gear ring (105) that mates with the end of the drive shaft (104), an end cap (106) connected to the end of the drive shaft (104), a housing (102) sleeved on the outside of the gear ring (105) and the end cap (106), and mounting seats (101) fixed at both ends of the housing (102). The mounting base (101) has a screw hole (101a) on its upper side for fastener installation, and a self-locking knob (101b) is threadedly fitted on the side of the mounting base (101).

2. The improved self-locking ball screw structure according to claim 1, characterized in that, The lead screw (103) passes through the middle of the mounting base (101), and the periphery of the lead screw (103) is engaged with the threaded inner end of the self-locking knob (101b).

3. The improved self-locking ball screw structure according to claim 1, characterized in that, The drive shaft (104) includes a screw (104a), a gear shaft (104b) integrally disposed at both ends of the screw (104a), and a shaft end (104c) fixed to the end of the gear shaft (104b).

4. The improved self-locking ball screw structure according to claim 3, characterized in that, The screw (104a) is adapted to the circumference of the lead screw (103), the gear shaft (104b) is adapted to the inner side of the gear ring (105), and the shaft end (104c) passes through the end cover (106).

5. The improved self-locking ball screw structure according to claim 1, characterized in that, The toothed ring (105) is fixed to the end cap (106), and the toothed ring (105) and the end cap (106) are movably attached to the inner wall of the housing (102).

6. The improved self-locking ball screw structure according to claim 1, characterized in that, The end of the lead screw (103) passes through the middle of the end cap (106), and there is a gap between the lead screw (103) and the end cap (106).

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