Angular compensation structure of ball screw

Abstract

The utility model discloses a kind of angle compensation structure of screw rod nut, including main nut, the utility model is equipped with lug portion in the side of main nut, and the first jack portion of horizontal direction in the middle part of lug portion side surface is inserted into the first insertion column of link ring block side surface, and the second insertion column of the middle part of the other side surface vertical direction of link ring block is inserted into the second jack portion of pre-pressing nut side surface, multiple opening portions, multiple internal thread hole portions and multiple through-hole portions are set in link ring block side surface, rotatable internal hexagon screw is inserted into opening portion and internal thread hole portion, and the external thread portion of internal hexagon screw is engaged with internal thread hole portion, spring one end is fixedly connected in the side of internal hexagon screw, and spring other end is pressed in ball side surface, after angle compensation, screw rod nut can accurately eliminate the axial gap (backlash) between lead screw and nut, to improve transmission accuracy, stiffness and repeat positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of lead screw and nut technology, and specifically to an angle compensation structure for lead screw and nut. Background Technology

[0002] "Angle compensation" in ball screw and nut systems is a technique used in double-nut preload structures of ball screws. It utilizes the phase difference (angular offset) between the starting points of the external threads of the two nuts to automatically generate the required axial preload during assembly and tightening, thereby eliminating axial backlash in the screw and nut pair. It is a key design element for achieving high-precision, high-rigidity ball screw drives. Its core lies in using precise angular design differences to achieve axial displacement, thus realizing preload. Therefore, an angle compensation structure for the screw and nut is needed to address the above situation. Utility Model Content

[0003] The purpose of this invention is to provide an angle compensation structure for a lead screw nut, thereby solving the problems mentioned in the background.

[0004] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution: an angle compensation structure for a lead screw nut, including a main nut, a protrusion on one side of the main nut, and a first insert post horizontally arranged between the protrusion and the connecting ring block. A preload nut is fixedly connected to the other side of the connecting ring block, and a second insert post is vertically arranged between the connecting ring block and the preload nut. An opening, an internal threaded hole, and a through hole are respectively opened on the side of the connecting ring block, and the opening, internal threaded hole, and through hole are integrated. A hexagonal socket screw, a spring, and a ball are inserted into the opening, internal threaded hole, and through hole. One end of the hexagonal socket screw is fixedly connected to one end of the spring, and the other end of the spring and one side of the through hole are respectively in contact with and rollingly connected to the side of the ball. A placement hole is opened in the middle of the connecting ring block, and the other side of the ball protrudes through the inner side of the placement hole. A lead screw is inserted into the placement hole, and the sides of the ball are all placed in the thread groove of the lead screw.

[0005] Preferably, a first insertion hole is provided on both sides of the middle horizontal direction of the end face of the protrusion, and a first insertion post is inserted into the first insertion hole. At the same time, the other ends of the two first insertion posts are inserted into both sides of the middle horizontal direction of one side end face of the connecting ring block.

[0006] Preferably, the end face of the protrusion portion is in close contact with one end face of the connecting ring block, and the diameter of the protrusion portion and the connecting ring block are the same.

[0007] Preferably, a second insert post is fixedly connected vertically to the middle of the other end face of the connecting ring block, and a second insertion hole is provided vertically to the middle of the side face of the preload nut.

[0008] Preferably, a second insert post is inserted into the second insertion hole, and the side of the preload nut is in close contact with the other end face of the connecting ring block, while the preload nut and the connecting ring block have the same diameter.

[0009] Preferably, the head of the hexagon socket screw is placed inside the opening, and the hexagon socket screw has an external thread portion, which engages with the internal threaded hole portion.

[0010] Preferably, both the spring and the ball are placed inside the through hole, and the side of the ball is in contact with the inner wall of the through hole.

[0011] Preferably, the main nut has a top cap portion in the middle of one side.

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] This invention features a protrusion on one side of the main nut, with a first insert post on the side of the connecting ring block inserted into a first horizontal insertion hole in the middle of the protrusion. A second vertical insertion post on the other side of the connecting ring block is inserted into a second insertion hole on the side of the preload nut. Multiple openings, internal threaded holes, and through holes are provided on the side of the connecting ring block. Rotatable hexagonal socket screws are inserted into the openings and internal threaded holes, with the external thread of the hexagonal socket screw engaging with the internal threaded hole. A spring is fixedly connected to one side of the hexagonal socket screw, with the other end of the spring pressing against the side of the ball bearing. After angle compensation, the axial clearance (backlash) between the screw and nut can be precisely eliminated, thereby improving transmission accuracy, rigidity, and repeatability. Attached Figure Description

[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0016] Figure 2 This is a side sectional view of the connecting ring block of this utility model;

[0017] Figure 3 This is an enlarged schematic diagram of point A in this utility model;

[0018] Figure 4 This is an overall exploded view of the present invention;

[0019] Figure 5This is a front view of one side of the connecting ring block of this utility model;

[0020] Figure 6 This is a front view of the other side of the connecting ring block of this utility model.

[0021] The labels in the attached diagram represent the following:

[0022] 1. Main nut; 11. Protrusion part; 101. First insertion hole part; 2. Connecting ring block; 201. Opening part; 202. Internal threaded hole part; 203. Through hole part; 204. Placement hole part; 3. Preload nut; 301. Second insertion hole part; 4. Socket head screw; 401. External thread part; 5. Spring; 6. Ball bearing; 7. First insertion post; 701. Second insertion post; 8. Top cap part. Detailed Implementation

[0023] 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 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] Please see Figure 1-6 As shown, this utility model provides an angle compensation structure for a lead screw nut, including a main nut 1. A protrusion 11 is provided on one side of the main nut 1, and one side of the protrusion 11 is fixedly connected to one side of a connecting ring block 2. A first insert 7 is horizontally positioned between the protrusion 11 and the connecting ring block 2. A preload nut 3 is fixedly connected to the other side of the connecting ring block 2, and a second insert 701 is vertically positioned between the connecting ring block 2 and the preload nut 3. An opening 201, an internal threaded hole 202, and a through hole 203 are respectively opened on the side of the connecting ring block 2. 1. The internal threaded hole 202 and the through hole 203 are integrated. The opening 201, the internal threaded hole 202 and the through hole 203 are all inserted with hexagonal screws 4, springs 5 ​​and balls 6. One end of the hexagonal screw 4 is fixedly connected to one end of the spring 5. At the same time, the other end of the spring 5 and one side of the through hole 203 are respectively in contact with the side of the ball 6 and roll in contact. The connecting ring block 2 has a placement hole 204 in the middle. The other side of the ball 6 passes through the inner side of the placement hole 204. A screw is inserted into the placement hole 204, and the side of the ball 6 is placed in the thread groove of the screw.

[0025] In this embodiment, a first insertion hole 101 is provided on both sides of the middle of the end face of the protrusion 11 in the horizontal direction, and a first insertion post 7 is inserted into the first insertion hole 101. At the same time, the other ends of the two first insertion posts 7 are inserted into the middle of the horizontal part of one side end face of the connecting ring block 2.

[0026] Furthermore, the end face of the protrusion 11 is in close contact with one end face of the connecting ring block 2, and the diameter of the protrusion 11 and the connecting ring block 2 are the same.

[0027] Furthermore, the other end face of the connecting ring block 2 is vertically connected to the upper and lower parts of the middle section, and the preload nut 3 is vertically provided with the upper and lower parts of the middle section of the side.

[0028] Furthermore, the second insertion post 701 is inserted into the second insertion hole 301, and the side of the preload nut 3 is tightly fitted with the other end face of the connecting ring block 2. At the same time, the preload nut 3 and the connecting ring block 2 have the same diameter.

[0029] A horizontal first insert 7 is inserted into the protrusion 11 of the main nut 1, so that the main nut 1 and the connecting ring block 2 are connected as one unit. Then, the vertical second insert 701 on the other side of the connecting ring block 2 is inserted into the second insertion hole 301 on the side of the preload nut 3, so that the connecting ring block 2 and the preload nut 3 are integrated. In this way, the main nut 1, the connecting ring block 2, and the preload nut 3 are integrated as one unit, and a lead screw is inserted inside this unit.

[0030] In this embodiment, the head of the internal hexagon screw 4 is placed inside the opening 201, and the internal hexagon screw 4 is provided with an external thread 401, while the external thread 401 engages with the internal thread hole 202.

[0031] Furthermore, both the spring 5 and the ball 6 are placed inside the through hole 203, and the side of the ball 6 is in contact with the inner wall of the through hole 203.

[0032] An internal hexagon screw 4, a spring 5, and a ball 6 are respectively provided in the opening 201, the internal threaded hole 202, and the through hole 203. After the internal hexagon screw 4 rotates, it presses the spring 5 to press the ball 6 into the threaded groove of the lead screw.

[0033] In this embodiment, a top cap 8 is provided in the middle of one side of the main nut 1.

[0034] Working principle:

[0035] A protrusion 11 is provided on one side of the main nut 1, and a first insert 7 on the side of the connecting ring block 2 is inserted into a first insertion hole 101 in the horizontal direction at the center of the side of the protrusion 11. A second insert 701 in the vertical direction at the center of the other side of the connecting ring block 2 is inserted into a second insertion hole 301 on the side of the preload nut 3. Since the two first inserts 7 and the two second inserts 701 form a cross shape, the main nut 1, the connecting ring block 2, and the preload nut 3 remain integrated even when the lead screw is inserted. The ring block 2 has multiple openings 201, multiple internally threaded holes 202, and multiple through holes 203 on its side. At any given point, the openings 201, internally threaded holes 202, and through holes 203 are connected as a single unit, and their interiors are interconnected. A rotatable hexagonal socket screw 4 is inserted into the opening 201 and the internally threaded hole 202, with the external thread 401 of the hexagonal socket screw 4 engaging with the internally threaded hole 202. A spring 5 is fixedly connected to one side of the hexagonal socket screw 4, and the other end of the spring 5 presses against... The ball 6 is positioned on the side of the through hole 203, and its side extends beyond the through hole 203 into the placement hole 204. When the lead screw passes through the main nut 1, connecting ring 2, and preload nut 3, the ball 6 is pushed into the through hole 203. After the lead screw is in place, the internal hex screw 4 can be rotated to compress the spring 5, so that the side of the ball 6 is placed in the thread groove of the lead screw. At the same time, the multiple balls 6 provided on the side of the connecting ring 2 correspond to the thread groove. However, since there are multiple balls 6 on the side of the connecting ring 2, each ball 6 will not be fully in contact with the thread groove due to gravity. Then, the internal hex screw 4 is rotated to adjust the ball 6 to the most suitable position. Then, the side of the ball 6 is in contact with the inner wall of the thread groove, and the ball 6 forms a small angle with the bottom of the thread groove. In this way, the starting point of the thread is deliberately offset by a small angle (e.g., a fraction of a degree to a few degrees). This offset angle is called angle compensation.

[0036] 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.

[0037] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. An angle compensation structure for a lead screw nut, comprising a main nut (1), characterized in that: The main nut (1) has a protrusion (11) on one side, and one side of the protrusion (11) is fixedly connected to one side of the connecting ring block (2). At the same time, a first insert (7) is horizontally provided in the middle between the protrusion (11) and the connecting ring block (2). A preload nut (3) is fixedly connected to the other side of the connecting ring block (2), and a second insert (701) is vertically provided between the connecting ring block (2) and the preload nut (3). The connecting ring block (2) has an opening (201), an internal threaded hole (202), and a through hole (203) on its side, and the opening (201), the internal threaded hole (202), and the through hole (203) are also provided. The components are integrated into one unit. The opening (201), the internal threaded hole (202), and the through hole (203) are all fitted with hexagonal screws (4), springs (5), and balls (6). One end of the hexagonal screw (4) is fixedly connected to one end of the spring (5), while the other end of the spring (5) and one side of the through hole (203) are respectively fitted and rolled to the side of the ball (6). The connecting ring block (2) has a placement hole (204) in the middle, and the other side of the ball (6) extends out of the inner side of the placement hole (204). A screw is inserted into the placement hole (204), and the sides of the ball (6) are all placed in the threaded groove of the screw.

2. The angle compensation structure for the lead screw nut according to claim 1, characterized in that: The protrusion (11) has a first insertion hole (101) on both sides of the middle horizontal direction of the end face, and a first insertion post (7) is inserted into the first insertion hole (101). At the same time, the other ends of the two first insertion posts (7) are inserted into the middle horizontal direction of one side of the connecting ring block (2).

3. The angle compensation structure for the lead screw nut according to claim 2, characterized in that: The end face of the protrusion (11) is closely fitted with one end face of the connecting ring block (2), and the diameter of the protrusion (11) and the connecting ring block (2) are the same.

4. The angle compensation structure for the lead screw nut according to claim 3, characterized in that: The connecting ring block (2) has a second insert (701) fixedly connected vertically to the middle of the other end face, and the preload nut (3) has a second insertion hole (301) vertically opened vertically to the middle of the side face.

5. The angle compensation structure for the lead screw nut according to claim 4, characterized in that: The second insertion post (701) is inserted into the second insertion hole (301), and the side of the preload nut (3) is tightly fitted with the other end face of the connecting ring block (2), while the preload nut (3) and the connecting ring block (2) have the same diameter.

6. The angle compensation structure for the lead screw nut according to claim 1, characterized in that: The head of the internal hexagon screw (4) is placed inside the opening (201), and the internal hexagon screw (4) is provided with an external thread (401), while the external thread (401) engages with the internal thread hole (202).

7. The angle compensation structure for the lead screw nut according to claim 6, characterized in that: The spring (5) and the ball (6) are both placed inside the through hole (203), and the side of the ball (6) is in contact with the inner wall of the through hole (203).

8. The angle compensation structure for the lead screw nut according to claim 1, characterized in that: The main nut (1) has a top cap (8) in the middle of one side.

Images