Grinding tool for inner raceway of ball nut

Abstract

The utility model relates to the field of tool clamps, in particular to a grinding tool for an inner raceway of a ball nut. The grinding tool comprises a base; the clamping structure comprises a plurality of abutting blocks and compression springs connected with the abutting blocks and the base; the abutting block is provided with a guiding inclined face which is arranged in an inclined mode. A positioning structure, comprising a positioning column fixedly connected with the base, a fixed sleeve arranged on the circumferential outer side of the positioning column in a sleeving mode, a movable sleeve arranged on the circumferential outer side of the positioning column in a sliding and sleeving mode, a first connecting rod connected with the fixed sleeve in a hinged and matched mode and a second connecting rod connected with the first connecting rod in a hinged and matched mode. The third connecting rod is in hinged fit connection with the second connecting rod; a fixing hole is formed in the positioning column, and a fixing pin is arranged in the fixing hole. According to the grinding tool for the inner raceway of the ball nut, clamping and dismounting of the ball nut can be conveniently achieved only by taking down or inserting the fixing pin, use is convenient, and the feeding efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of frock clamp, concretely relates to a ball nut inner raceway grinding frock. BACKGROUND

[0002] Ball screw nut structure is a traditional rolling screw drive structure, can convert rotary motion into linear motion, has small friction, high transmission efficiency and high transmission precision characteristics, has been widely used in numerical control machine tool, machining center and other fields at present. Ball screw nut structure is mainly composed of ball nut, ball screw and ball.

[0003] The existing ball nut processing mode is to process thread hole and accessory slot first, and then grind the inner raceway of the thread cylinder. However, each thread cylinder needs to be clamped and fixed by a three-jaw chuck during grinding, which takes a lot of time and affects the grinding efficiency of the ball nut inner raceway.

[0004] Therefore, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0005] In order to improve or solve the technical problems that each thread cylinder needs to be clamped and removed from the three-jaw chuck, which takes a lot of time in the prior art, the utility model provides a ball nut inner raceway grinding frock. The grinding frock comprises a base, a clamping structure comprising a plurality of abutting blocks facing the ball nut and being in telescopic cooperation with the base, and a compression spring connecting the abutting blocks and the base; an inclined guide slope is arranged on the abutting block; a positioning structure is adapted to the mounting hole on the ball nut; the positioning structure comprises a positioning column fixedly connected with the base, a fixed sleeve sleeved on the circumferential outer side of the positioning column and fixedly connected with the base, a movable sleeve slidably sleeved on the circumferential outer side of the positioning column, a first connecting rod hingedly connected with the fixed sleeve, a second connecting rod hingedly connected with the first connecting rod, and a third connecting rod hingedly connected with the second connecting rod and the movable sleeve; a fixed hole is formed in the positioning column, and a fixed pin is arranged in the fixed hole.

[0006] In the ball nut inner raceway grinding tool, the clamping structure includes an abutting block and a compression spring, a guide slope is arranged on the abutting block, the ball nut can be pushed to the abutting block, the abutting block is pushed to move away from the ball nut, the compression spring is compressed in the process, and the ball nut is clamped between the multiple abutting blocks through the reaction force of the compression spring. The positioning structure includes a positioning column, a fixed sleeve, a moving sleeve, a first connecting rod, a second connecting rod and a third connecting rod, the moving sleeve is close to the fixed sleeve, the second connecting rod is close to and abuts against the outer peripheral wall of the mounting hole of the ball nut, so that the positioning column is fixedly connected with the ball nut. A fixing hole is formed in the positioning column, and a fixing pin is arranged in the fixing hole, for preventing the moving sleeve from moving away from the fixed sleeve. Through the above arrangement, the ball nut inner raceway grinding tool only needs to take out or insert the fixing pin to conveniently clamp and disassemble the ball nut, is convenient to use, and has high feeding efficiency.

[0007] Further, a sliding groove matched with the abutting block and a guide hole connected with the sliding groove are formed in the base; the abutting block is connected with a guide column matched with the guide hole, the guide column is slidably arranged in the guide hole; and the compression spring is sleeved on the circumferential outer side of the guide column.

[0008] Further, the positioning structure is provided with multiple groups, and a positioning pin matched with the mounting hole of the ball nut is further arranged on the base.

[0009] Further, the first connecting rod, the second connecting rod and the third connecting rod are provided with multiple groups, and the multiple groups of the first connecting rod, the second connecting rod and the third connecting rod are uniformly and spacedly arranged along the circumference of the positioning column.

[0010] Further, the first connecting rod is uniformly and spacedly arranged with four groups along the circumference of the positioning column.

[0011] Further, a tension spring is arranged between the second connecting rod and the positioning column, and the tension spring is configured to pull the second connecting rod to the positioning column.

[0012] Compared with the prior art, the ball nut inner raceway grinding tool has the following beneficial effects:

[0013] By moving the sleeve close to the fixed sleeve, the second connecting rod is close to and abuts against the outer peripheral wall of the mounting hole on the ball nut, so that the positioning column is fixedly connected with the ball nut. A fixing hole is formed on the positioning column, and a fixing pin is arranged in the fixing hole, so that the movement of the moving sleeve away from the fixed sleeve is prevented; the ball nut can be conveniently clamped and removed by only taking out or inserting the fixing pin, and the ball nut is convenient to use and high in feeding efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] The preferred embodiments of the present application will be described below with reference to the drawings, in which:

[0015] Figure 1 is a schematic view of an embodiment of the ball nut inner raceway grinding tool of the present application;

[0016] Figure 2 is Figure 1 is an enlarged schematic view of position A in FIG. 3.

[0017] LIST OF REFERENCE NUMERALS: 1, base; 2, clamping structure; 21, abutting block; 22, compression spring; 23, guide inclined surface; 24, guide column; 3, positioning structure; 31, positioning column; 32, fixed sleeve; 33, moving sleeve; 34, first connecting rod; 35, second connecting rod; 36, third connecting rod; 37, tension spring; 38, fixing pin. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present application will be described below with reference to the drawings, in which:

[0019] It should be noted that, in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship terms based on the direction or positional relationship shown in the drawings, which are merely for the convenience of description, and are not intended to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0020] In addition, it should also be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] In order to improve or solve the technical problem that each threaded cylinder needs to be clamped and removed from the three-jaw chuck, and a lot of time is spent, the utility model provides a ball nut inner raceway grinding tool. The grinding tool comprises: a base 1; a clamping structure 2 comprising a plurality of abutting blocks 21 facing the ball nut and being in telescopic fit connection with the base 1, and a compression spring 22 connecting the abutting blocks 21 and the base 1; an inclined guide slope 23 is arranged on the abutting block 21; a positioning structure 3 is adapted to be matched with the mounting hole on the ball nut; the positioning structure 3 comprises a positioning column 31 in fixed connection with the base 1, a fixed sleeve 32 sleeved on the circumferential outer side of the positioning column 31 and in fixed connection with the base 1, a movable sleeve 33 slidably sleeved on the circumferential outer side of the positioning column 31, a first connecting rod 34 in hinged fit connection with the fixed sleeve 32, a second connecting rod 35 in hinged fit connection with the first connecting rod 34, and a third connecting rod 36 in hinged fit connection with the second connecting rod 35 and in hinged fit connection with the movable sleeve 33; a fixed hole is formed in the positioning column 31, and a fixed pin 38 is arranged in the fixed hole.

[0022] Figure 1 is a schematic view of an embodiment of the utility model of a ball nut inner raceway grinding tool. As shown in Figure 1 , in one or more embodiments, the utility model of a ball nut inner raceway grinding tool comprises a base 1, a clamping structure 2, a positioning structure 3 and a positioning pin.

[0023] Continuing to refer to Figure 1 , the base 1 is a substantially rectangular plate, a recess adapted to be matched with the flange plate on the ball nut is formed on one side of the base 1, and the flange plate on the ball nut can be inserted into the recess, thereby limiting the position of the ball nut. Further, a sliding groove and a guide hole are further arranged on the base 1, the sliding groove is connected with the recess, and the guide hole is arranged on the side of the sliding groove away from the recess. Specifically, the sliding groove and the guide hole are arranged in multiple groups. Exemplarily, the sliding groove and the guide hole are arranged in four groups, two of which are located above the recess, and the other two are located below the recess.

[0024] Continuing to refer to Figure 1The clamping structure 2 is installed on the base 1. In one or more embodiments, the clamping structure 2 comprises a plurality of abutting blocks 21 facing the ball nut and matching the sliding grooves, and a compression spring 22 connecting the abutting blocks 21 and the base 1. Specifically, the abutting blocks 21 are in the shape of a substantially cuboid block, and one abutting block 21 is slidably arranged in a corresponding sliding groove. For example, four abutting blocks 21 are provided, and the four abutting blocks 21 are arranged in four sliding grooves respectively. Further, an inclined guide slope 23 is arranged on the abutting block 21. The guide slope 23 is arranged at a corner of the abutting block 21 away from the compression spring 22 and the base 1. Further, a guide column 24 matching the guide hole is arranged on the abutting block 21, the guide column 24 is arranged in the guide hole in an extendable manner, and the compression spring 22 is sleeved on the circumferential outer side of the guide column 24. The worker pushes the ball nut into the groove, the flange plate of the ball nut abuts against the guide slope 23, and the abutting block 21 is pushed away from the groove; in this process, the compression spring 22 is compressed, and the reverse force of the compression spring 22 drives the abutting block 21 to clamp the flange plate of the ball nut.

[0025] Figure 2 is Figure 1 an enlarged schematic view of A in Figure 1 and Figure 2As shown, the flange plate of the ball nut is provided with a plurality of mounting holes, the positioning structure 3 is provided with a plurality of groups, and the positioning pin is provided with a plurality of groups; the positioning structure 3 and the positioning pin are matched with the mounting hole. In one or more embodiments, the flange plate is provided with six mounting holes, the positioning structure 3 is provided with two groups, and the two groups of positioning structures 3 are diagonally arranged; the positioning pin is provided with four, and the four positioning pins are arranged in the remaining four mounting holes of the flange plate. Further, the positioning structure 3 includes a positioning column 31 fixedly connected with the base 1, a fixed sleeve 32 sleeved on the circumferential outer side of the positioning column 31, a movable sleeve 33 sleeved on the circumferential outer side of the positioning column 31, a first connecting rod 34 hingedly connected with the fixed sleeve 32, a second connecting rod 35 hingedly connected with the first connecting rod 34, and a third connecting rod 36 hingedly connected with the second connecting rod 35. Wherein, one end of the positioning column 31 is fixed on the base 1, the other end extends horizontally outward, and the length of the positioning column 31 is greater than the thickness of the flange plate. The fixed sleeve 32 is substantially cylindrical, and one side of the fixed sleeve 32 is fixedly connected with the base 1. The fixed sleeve 32 is provided with a hinge column, both ends of the first connecting rod 34 are provided with hinge holes matched with the hinge column, and the first connecting rod 34 is sleeved on the hinge column, so that the fixed sleeve 32 and the first connecting rod 34 are hingedly connected. Further, both ends of the second connecting rod 35 are provided with hinge columns, and the other end of the first connecting rod 34 is connected with the hinge column of the second connecting rod 35, so that the first connecting rod 34 and the second connecting rod 35 are hingedly connected. Both ends of the third connecting rod 36 are provided with hinge holes, and the movable sleeve 33 is provided with a hinge column, so that both ends of the third connecting rod 36 are respectively hingedly connected with the second connecting rod 35 and the movable sleeve 33. Further, the first connecting rod 34, the second connecting rod 35 and the third connecting rod 36 are provided with a plurality of groups, and the plurality of groups of connecting rod structures are uniformly and spacedly arranged along the circumference of the positioning column 31. For example, the first connecting rod 34, the second connecting rod 35 and the third connecting rod 36 are uniformly and spacedly arranged along the circumference of the positioning column 31. Further, a tension spring 37 is arranged between the second connecting rod 35 and the positioning column 31, both ends of the tension spring 37 are respectively connected with the second connecting rod 35 and the positioning column 31, for pulling the second connecting rod 35 towards the positioning column 31, facilitating the mounting hole of the flange plate to be sleeved on the outer side of the positioning structure 3. Further, a fixed hole is formed in the positioning column 31, and a fixed pin 38 is arranged in the fixed hole. The movable sleeve 33 moves towards the fixed sleeve 32, the first connecting rod 34 and the third connecting rod 36 are inclined, the second connecting rod 35 abuts against the inner wall of the mounting hole, and then the fixed pin 38 is inserted, preventing the movable sleeve 33 from moving away from the fixed sleeve 32, so that the positioning structure 3 and the flange plate of the ball nut are fixedly connected; the fixed pin 38 is pulled out, and the movable sleeve 33 moves away from the fixed sleeve 32, so that the ball nut can be pulled out of the base 1.

[0026] The technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the utility model, and the technical schemes after the changes or replacements will all fall within the protection scope of the utility model.

Claims

1. A ball nut inner raceway grinding tool characterized by, The utility model relates to a ball nut clamp structure, including: Base (1); Clamping structure (2) including a plurality of abutting blocks (21) towards ball nut and telescopic fit connection with base (1), and the compression spring (22) connecting abutting block (21) with base (1);The inclined arrangement guide inclined plane (23) is arranged on the abutting block (21); Positioning structure (3) is suitable for with the upper installation hole of ball nut is matched;The positioning structure (3) includes the positioning column (31) with base (1) forms fixed connection, the fixed sleeve (32) of the circumferential outside of positioning column (31) is set and with base (1) forms fixed connection, the movable sleeve (33) of the circumferential outside of positioning column (31) is slidably set, the first connecting rod (34) with fixed sleeve (32) forms hinged fit connection, the second connecting rod (35) with first connecting rod (34) forms hinged fit connection, the third connecting rod (36) with second connecting rod (35) forms hinged fit connection and with movable sleeve (33) forms hinged fit connection;Fixed hole is set up on the positioning column (31), and fixed pin (38) is arranged in fixed hole.

2. The ball nut inner raceway grinding tool of claim 1, wherein, The sliding groove matched with the abutting block (21) is set up on the base (1), and the guide hole connected with the sliding groove is set up;The abutting block (21) is connected with the guide column (24) matched with the guide hole, and the guide column (24) is slidably arranged in the guide hole;The compression spring (22) is set on the circumferential outside of guide column (24).

3. The ball nut inner raceway grinding tool of claim 1, wherein, The positioning structure (3) is provided with multiple groups, and the positioning pin matched with the upper installation hole of ball nut is further arranged on the base (1).

4. The ball nut inner raceway grinding tool of claim 1, wherein, The first connecting rod (34), the second connecting rod (35) and the third connecting rod (36) are provided with multiple groups, and multiple groups of the first connecting rod (34), the second connecting rod (35), the third connecting rod (36) are evenly and spaced arranged along the circumference of the positioning column (31).

5. The ball nut inner raceway grinding tool of claim 4, wherein, The first connecting rod (34) is evenly and spaced arranged with four groups along the circumference of the positioning column (31).

6. The ball nut inner raceway grinding tool of claim 4, wherein, The tensile spring (37) is arranged between the second connecting rod (35) and the positioning column (31), and the tensile spring (37) is configured to pull the second connecting rod (35) towards the positioning column (31).

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