Novel ball screw transmission structure

Abstract

The utility model relates to the technical field of ball screws, and discloses a novel ball screw transmission structure which comprises a mounting plate, the lower end of the mounting plate is fixedly connected with a nut connecting frame, the inner wall of the nut connecting frame is fixedly connected with a nut body, and the inner wall of the nut body is in threaded connection with a lead screw. The end, away from the nut connecting frame, of the lead screw is connected with the output end of a servo motor through a coupling, the end, close to the coupling, of the servo motor is fixedly connected with a motor support, the lower portion of the end, away from the servo motor, of the motor support is fixedly connected with a connecting disc, and the end, away from the motor support, of the connecting disc is fixedly connected with a ram. A tool apron is installed at the end, away from the motor support, of the ram. The ball screw does not need to meet the requirement that the length of a casting is larger than that of a moving part, the length of the sliding saddle does not need to be too long, the length of the ram can be designed according to requirements, and the ball screw is suitable for machining deep hole parts.

Description

Technical Field

[0001] The utility model relates to the technical field of ball screws, in particular to a novel ball screw drive structure. Background Art

[0002] A ball screw consists of a screw rod, a nut, steel balls, preloading sheets, a reverser, and a dust protector. A ball screw is a precision mechanical transmission component and is widely used in fields such as machine tools, automation equipment, and robots. It combines the advantages of a screw rod and balls, and has characteristics such as high transmission efficiency, low friction, and long service life. In short, a ball screw is an efficient and precision transmission component and plays an important role in modern machinery and automation.

[0003] A common usage method of a ball screw is that both ends of the screw rod are usually fixed and supported by bearings. The nut is connected to a moving component (such as a saddle). The tail of the screw rod is connected to the output end of a motor through a coupling. The nut will be converted into a linear motion according to the lead of the corresponding specification with the rotation angle of the screw rod, and the moving component thus realizes the corresponding linear motion. However, this usage method requires the screw rod to be installed in a casting longer than the screw rod, and it is necessary to ensure that the length of the moving component is less than the length of the casting. When the length of some moving components is greater than the length of the casting, such as in deep hole tool machining, this conventional ball screw is not applicable. Content of the Utility Model

[0004] To make up for the above deficiencies, the utility model provides a novel ball screw drive structure, aiming to improve the problem that the conventional ball screw is not applicable to the working scenario where the length of the moving component is greater than the length of the casting.

[0005] To achieve the above object, the utility model provides the following technical solution: A novel ball screw drive structure includes a mounting plate. A nut connecting frame is fixedly connected to the lower end of the mounting plate. A nut body is fixedly connected to the inner wall of the nut connecting frame. A screw rod is threadedly connected to the inner wall of the nut body. One end of the screw rod away from the nut connecting frame is connected to the output end of a servo motor through a coupling. A motor bracket is fixedly connected to one end of the servo motor close to the coupling. A connecting plate is fixedly connected to the lower part of the end of the motor bracket away from the servo motor. A ram is fixedly connected to the end of the connecting plate away from the motor bracket. A tool holder is installed at the end of the ram away from the motor bracket. A saddle is fixedly connected to the lower surface of the end of the nut connecting frame. The ram is slidably connected to the saddle.

[0006] Preferably, a plurality of empty slots are formed inside the nut connecting frame.

[0007] Preferably, a combined bearing is installed inside the motor bracket, and the inner ring inner wall of the combined bearing is fixedly connected to the screw rod.

[0008] Preferably, a seal is installed inside the motor bracket.

[0009] The utility model has the following beneficial effects:

[0010] 1. In the utility model, by fixing the nut connecting frame on the mounting plate to restrict the movement of the nut body, when the servo motor works, the lead screw can drive components such as the servo motor, the motor bracket, the ram and the tool holder to move linearly. In this way, the transmission structure does not need to meet the requirement that the length of the casting is greater than the length of the moving parts, nor does the length of the saddle need to be designed too long, and the length of the ram can be designed according to requirements. It is suitable for machining deep-hole parts, and the cost of this transmission structure is lower than that of the existing transmission structure for hole machining, with sufficient rigidity and certain practicality. Description of the Drawings

[0011] Figure 1 It is the front sectional view of a novel ball screw transmission structure proposed by the utility model;

[0012] Legend Explanation:

[0013] 1. Servo motor; 2. Coupling; 3. Lead screw; 4. Combined bearing; 5. Motor bracket; 6. Connecting disc; 7. Ram; 8. Nut connecting frame; 9. Saddle; 10. Tool holder; 11. Nut body; 12. Mounting plate; 13. Empty groove; 14. Seal. Detailed Embodiment

[0014] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the specification drawings of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0015] Refer to Figure 1, an embodiment provided by the present utility model: a novel ball screw drive structure, including a mounting plate 12, a nut connection frame 8 is fixedly connected to the lower end of the mounting plate 12, several empty slots 13 are provided inside the nut connection frame 8, the empty slots 13 allow the lead screw 3 to pass through the inside of the nut connection frame 8, the inner wall of the nut connection frame 8 is fixedly connected to the nut body 11, the inner wall of the nut body 11 is threadedly connected to the lead screw 3, one end of the lead screw 3 away from the nut connection frame 8 is connected to the output end of the servo motor 1 through a coupling 2, one end of the servo motor 1 close to the coupling 2 is fixedly connected to a motor bracket 5, a seal 14 is installed inside the motor bracket 5, the seal 14 is arranged on the left side of the combined bearing 4 to increase the sealing performance between the motor bracket 5 and the lead screw 3, a combined bearing 4 is installed inside the motor bracket 5, the inner ring inner wall of the combined bearing 4 is fixedly connected to the lead screw 3, the lower part of the end of the motor bracket 5 away from the servo motor 1 is fixedly connected to a connection plate 6, one end of the connection plate 6 away from the motor bracket 5 is fixedly connected to a ram 7, a tool holder 10 is installed at one end of the ram 7 away from the motor bracket 5, the lower surface of the end of the nut connection frame 8 is fixedly connected to a saddle 9, and the ram 7 is slidably connected to the saddle 9.

[0016] Specifically, since the nut connection frame 8 is fixed on the mounting plate 12 and the nut body 11 is fixedly installed in the nut connection frame 8, when the servo motor 1 works, components such as the lead screw 3, the servo motor 1, the motor bracket 5, the ram 7 and the tool holder 10 can move linearly according to the lead of the ball screw. The length of the saddle 9 in this ball screw drive mode does not need to be too long, and the length of the ram 7 can be designed to be very long, which is suitable for processing deep hole parts. And the tool holder 10 can install two tools according to requirements, and various processing methods can be realized.

[0017] Working principle: Since the nut connection frame 8 and the nut body 11 are fixedly installed, when the output end of the servo motor 1 rotates, the lead screw 3, the servo motor 1, the motor bracket 5 and the ram 7 can move linearly according to the lead of the ball screw. Therefore, the tool holder 10 installed on the ram 7 can move to drill holes in the parts to be processed.

[0018] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A novel ball screw transmission structure, comprising a mounting plate (12), characterized in that: The lower end of the mounting plate (12) is fixedly connected to a nut connecting frame (8), the inner wall of the nut connecting frame (8) is fixedly connected to a nut body (11), the inner wall of the nut body (11) is threadedly connected to a screw rod (3), the end of the screw rod (3) away from the nut connecting frame (8) is connected to the output end of the servo motor (1) through a coupling (2), the end of the servo motor (1) close to the coupling (2) is fixedly connected to a motor bracket (5), the lower part of the end of the motor bracket (5) away from the servo motor (1) is fixedly connected to a connecting plate (6), the end of the connecting plate (6) away from the motor bracket (5) is fixedly connected to a ram (7), the end of the ram (7) away from the motor bracket (5) is installed with a knife seat (10), the lower end surface of the nut connecting frame (8) is fixedly connected to a saddle (9), and the ram (7) is slidably connected to the saddle (9).

2. A novel ball screw transmission structure according to claim 1, characterized in that: A plurality of empty slots (13) are provided inside the nut connection frame (8).

3. A novel ball screw transmission structure according to claim 1, characterized in that: A combined bearing (4) is installed inside the motor bracket (5), and the inner wall of the inner ring of the combined bearing (4) is fixedly connected to the screw rod (3).

4. A novel ball screw transmission structure according to claim 1, characterized in that: A sealing member (14) is installed inside the motor bracket (5).

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