End plug type ball nut assembly tool

Abstract

The utility model discloses end plug type ball nut assembly tool, ball screw is set up obliquely, has the tapping section on ball screw, is equipped with ball nut on tapping section, still is equipped with half sleeve ring on tapping section, is equipped with the accommodation groove of accommodating ball on the top side wall of half sleeve ring, the front end portion of half sleeve ring still is provided with the butt joint of axial convex, is equipped with ball guide groove on butt joint portion, the bottom of accommodation groove is equipped with the neck of intercommunication with ball guide groove, and the neck can only pass one ball, and the rear end portion of ball nut is equipped with the butt joint groove of matching with butt joint portion. The utility model has the beneficial effects that: the operator only needs to hold ball nut with one hand, and rotates ball screw with the other hand, and ball enters ball guide groove from the neck under the action of gravity, and then enters ball guide inlet along the track of ball guide groove, and with the continuous rotation of screw rod, all balls enter ball guide inlet, and finally complete the installation of ball, and then make ball installation convenient.

Description

Technical Field

[0001] This utility model relates to the assembly of ball nuts, and in particular to the assembly fixture for end-plug type ball nuts. Background Technology

[0002] When assembling end-plug type ball nuts, the balls need to be sequentially inserted into the ball receiving groove formed by the ball nut and the ball screw. However, since the size of the balls is matched with the ball receiving groove, the installation of the balls is relatively difficult.

[0003] Based on long-term research and the characteristics of ball movement in end-plug type ball nuts, the inventors have proposed an assembly tooling for end-plug type ball nuts. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an assembly fixture for end-plug type ball nut.

[0005] The purpose of this utility model is achieved through the following technical solution: an end-plug type ball nut assembly fixture, including two spaced-apart support seats and a ball screw spanning the support seats. The ball screw is inclined and has a tapping section. A ball nut is fitted on the tapping section, and a half-ring is also fitted on the tapping section. A receiving groove for accommodating balls is opened on the top side wall of the half-ring. An axially protruding abutment part is also provided at the front end of the half-ring. A ball guide groove is opened on the abutment part. A constriction opening communicating with the ball guide groove is opened at the bottom of the receiving groove. Only one ball can pass through the constriction opening at a time. An abutment groove matching the abutment part is opened at the rear end of the ball nut. After the abutment part abuts with the abutment groove, the outlet of the ball guide groove is aligned with the ball inlet formed by the ball nut and the ball screw.

[0006] Optionally, the ball guide groove includes a ball inlet groove and a ball outlet groove. The ball inlet groove is axially arranged, and the ball outlet groove is spirally arranged. The spiral direction of the ball outlet groove matches the spiral direction of the ball screw thread. The ball inlet groove and the ball outlet groove are smoothly transitioned by an arc groove.

[0007] Optionally, the width of the starting end of the ball discharge groove is greater than the width of the ball screw thread, and the width of the ending end of the ball discharge groove is tapered, with the width of the tapered end matching the width of the screw thread.

[0008] Optionally, the rear end of the ball nut is provided with a stop, and the front end of the half ring is provided with a mating section that matches the stop.

[0009] Optionally, the two supports may be of different heights, with the front support being lower than the rear support.

[0010] Optionally, both support bases have V-grooves at their bottoms, with the two ends of the ball screw located within the corresponding V-grooves.

[0011] This utility model has the following advantages: The end-plug type ball nut assembly fixture of this utility model allows the operator to hold the ball nut with one hand and rotate the ball screw with the other. Under the action of gravity, the balls enter the ball guide groove from the constriction and then enter the ball inlet along the trajectory of the ball guide groove. As the screw rotates continuously, all the balls are then entered into the ball inlet, and finally the ball installation is completed, thus making the ball installation convenient. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 for Figure 2 Schematic diagram of the cross section of AA; Figure 4 This is a schematic diagram of a half-ring structure; Figure 5 This is a schematic diagram of the structure of a ball nut; In the diagram, 1-half collar, 2-ball screw, 3-ball nut, 4-support seat, 11-accommodating groove, 12-abutting part, 13-reduction opening, 14-ball guide groove, 15-ball discharge groove, 16-arc groove, 17-reduction opening, 18-ball guide groove, 19-fitting section, 21-tapping section, 31-abutting groove, 32-ball guide opening, 33-stop, 41-V-groove. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0015] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0016] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0017] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] like Figure 1As shown, the end-plug type ball nut assembly fixture includes two spaced-apart support seats 4 and a ball screw 2 spanning across the support seats 4. The ball screw 2 is inclined. In this embodiment, the front end of the ball screw 2 is low and the rear end is high. The ball screw 2 has a tapping section 21, on which a ball nut 3 is fitted. A half-ring 1 is also fitted on the tapping section 21. In this embodiment, the half-ring 1 has a semi-circular cross-section, and its semicircle matches the tapping section 21. Therefore, during installation, the half-ring 1 can be quickly fitted onto the tapping section 21, and during disassembly, the half-ring 1 can also be quickly removed from the tapping section 21. The top side wall of the half-ring 1 has a receiving groove 11 for accommodating balls. The front end of the half-ring 1 also has an axially protruding abutment part 12. The abutment part 12 has a ball guide groove 18. The bottom of the receiving groove 11 has a connection with the ball guide groove 18. The ball screw nut 3 has a constriction 13 that allows only one ball to pass through at a time. The rear end of the ball screw nut 3 has an abutment groove 31 that matches the abutment part 12. After the abutment part 12 abuts against the abutment groove 31, the outlet of the ball guide groove 18 is aligned with the ball inlet 32 ​​formed by the ball screw nut 3 and the ball screw 2. In use, the appropriate ball is placed into the receiving groove 11. Then, the operator holds the ball screw nut 3 with one hand and rotates the ball screw 2 with the other. Since the abutment part 12 abuts against the abutment groove 31, the half ring 1 will not rotate. Since the front end of the ball screw 2 is lower than the rear end, the ball enters the ball guide groove 18 from the constriction 13 under the action of gravity. Then, it enters the ball inlet 32 ​​along the trajectory of the ball guide groove 18. As the screw rotates continuously, all the balls enter the ball inlet 32, and finally the ball installation is completed, which makes the ball installation convenient.

[0020] In this embodiment, the ball guide groove 18 includes a ball inlet groove 14 and a ball outlet groove 15. The ball inlet groove 14 is axially arranged, and the ball outlet groove 15 is spirally arranged. The spiral direction of the ball outlet groove 15 matches the spiral direction of the ball screw 2's threads. The ball inlet groove 14 and the ball outlet groove 15 are smoothly transitioned by an arc groove 16. Since the spiral direction of the ball outlet groove 15 matches the spiral direction of the ball screw 2's threads, the ball outlet groove 15 can always be aligned with the ball inlet 32 ​​when the ball screw 2 rotates. Furthermore, the width of the starting end of the ball discharge groove 15 is greater than the width of the thread of the ball screw 2, and the width of the end of the ball discharge groove 15 is provided with a narrowing 17. The width of the narrowing 17 matches the width of the thread of the screw. Therefore, after the ball enters the ball guide groove 14 through the narrowing 13, it enters the ball discharge groove 15 under the guidance of the arc groove 16. Under the guidance of the ball discharge groove 15, the ball enters the groove of the ball screw 2, and finally enters the ball guide opening 32 formed by the ball nut 3 and the ball screw 2.

[0021] In this embodiment, the rear end of the ball nut 3 is also provided with a stop 33, and the front end of the half ring 1 is provided with a mating section 19 that matches the stop 33. During installation, the relative position between the half ring 1 and the ball nut 3 is fixed by the mating of the stop 33 and the mating section 19 and the abutting of the abutting groove 31 and the abutting part 12, thereby ensuring the reliability of the ball installation.

[0022] In this embodiment, the heights of the two support seats 4 are not the same, and the front support seat 4 is lower than the rear support seat 4, so that the front end of the ball screw 2 is low and the rear end is high. V-grooves 41 are provided at the bottom of both support seats 4, and the two ends of the ball screw 2 are located in the corresponding V-grooves 41. Both ends of the ball screw 2 are round shafts, and the round shafts placed in the V-grooves 41 can automatically align under the action of gravity. Therefore, when the ball screw 2 rotates, the coaxiality of the ball screw 2 can be guaranteed, thereby ensuring the reliability of the ball installation.

[0023] The working process of this utility model is as follows: The ball nut 3 is fitted onto the tapping section 21 of the ball screw 2, and then the half ring 1 is fitted onto the tapping section 21, so that the abutting end of the half ring 1 abuts against the abutting groove 31 of the ball nut 3. At this time, the relative position of the half ring 1 and the ball nut 3 is fixed. Then, the matching ball is placed into the receiving groove 11. The operator holds the ball nut 3 with one hand and rotates the ball screw 2 with the other hand. Since the front end of the ball screw 2 is low and the rear end is high, the ball enters the ball guide groove 14 through the constriction 13 under the action of gravity. Under the guidance of the arc groove 16, it enters the ball discharge groove 15. Under the guidance of the ball discharge groove 15, the ball enters the tooth groove of the ball screw 2, and finally enters the ball inlet 32 ​​formed by the ball nut 3 and the ball screw 2, thus making the ball installation convenient.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An end-plug type ball nut assembly fixture, characterized in that: The device includes two spaced-apart support seats and a ball screw spanning the support seats. The ball screw is inclined and has a tapping section. A ball nut is fitted onto the tapping section, and a half-ring is also fitted onto the tapping section. The top side wall of the half-ring has a receiving groove for accommodating balls. The front end of the half-ring also has an axially protruding abutment. The abutment has a ball guide groove. The bottom of the receiving groove has a constriction that communicates with the ball guide groove. Only one ball can pass through the constriction at a time. The rear end of the ball nut has an abutment groove that matches the abutment. After the abutment and the abutment groove abut against each other, the outlet of the ball guide groove is aligned with the ball inlet formed by the ball nut and the ball screw.

2. The end-plug type ball nut assembly fixture according to claim 1, characterized in that: The ball guide groove includes a ball inlet groove and a ball outlet groove. The ball inlet groove is axially arranged, and the ball outlet groove is spirally arranged. The spiral direction of the ball outlet groove matches the spiral direction of the ball screw thread. The ball inlet groove and the ball outlet groove are smoothly transitioned by an arc groove.

3. The end-plug type ball nut assembly fixture according to claim 2, characterized in that: The width of the starting end of the ball discharge groove is greater than the width of the ball screw thread, and the width of the ending end of the ball discharge groove is provided with a tapering opening, the width of which matches the width of the screw thread.

4. The end-plug type ball nut assembly fixture according to claim 3, characterized in that: The rear end of the ball nut is provided with a stop, and the front end of the half collar is provided with a mating section that matches the stop.

5. The end-plug type ball nut assembly fixture according to any one of claims 1 to 4, characterized in that: The two support bases are not at the same height, and the front support base is lower than the rear support base.

6. The end-plug type ball nut assembly fixture according to claim 5, characterized in that: Both of the support bases have V-shaped grooves at their bottoms, and the two ends of the ball screw are located in the corresponding V-shaped grooves.

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