Nut retainer structure

Abstract

The utility model relates to the technical field of retainers, in particular to a nut retainer structure which comprises a cover plate, a tooth-shaped ring and a sealing frame, and the cover plate is arranged outside the tooth-shaped ring in a sleeved mode. The sealing frame is provided with a plurality of ball pockets used for fixing steel balls, the tracks of the ball pockets are spirally distributed on the annular circumferential wall of the sealing frame, one steel ball is arranged in each ball pocket in a rolling mode, the two axial ends of the sealing frame are each connected with a tooth-shaped ring in an inserted mode, and at least one part of the sealing frame penetrates through the tooth-shaped rings and is connected to the cover plate in an inserted mode. According to the utility model, the retainer structure is improved, so that the use of circulating parts is avoided, the noise is greatly reduced, the installation difficulty is reduced, and the lubricating property and the machinability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of retainers, in particular to a nut retainer structure. Background Art

[0002] Ball screws are ideal for converting rotary motion into linear motion, or vice versa. Ball screws typically consist of a nut, a lead screw shaft, and steel balls. The nut and lead screw shaft come into direct contact with each other during movement, leading to collisions and noise during high-speed, cyclic operation.

[0003] To avoid the above situation, the existing technology mainly realizes the staggered arrangement of the steel balls by setting a retaining block between two adjacent steel balls. In order to ensure that the ball screw can continue to move during use, it is also necessary to cooperate with the circulation structure to realize the circulation of the steel balls. The popular circulation methods on the market are mainly internal circulation, external circulation and end circulation. For the above circulation methods, they all rely on ball returners or circulation bends to make the steel balls circulate in the bends to realize the circulation of the steel balls. However, the circulation structure is difficult to design and has high processing requirements. In order to achieve the coordination between the circulation structure, steel balls and retaining blocks, the development difficulty is increased to a certain extent, and the installation difficulty is relatively high, which is inconvenient to install and disassemble. Utility Model Content

[0004] The technical problem to be solved by the present invention is: in order to solve the technical problems that the existing retainer still needs to use a circulation structure after installation, which is easy to generate noise, has high design difficulty, high processing requirements, and is inconvenient for disassembly and assembly, the present invention provides a nut retainer structure. By improving the retainer structure, the use of circulation components is avoided, the noise is greatly reduced, the installation difficulty is reduced, and the lubrication performance and machinability are improved.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a nut retainer structure, comprising:

[0006] cover;

[0007] A toothed ring, wherein the cover plate is sleeved on the outside of the toothed ring;

[0008] A sealing frame is provided with a plurality of ball pocket holes for fixing steel balls, the trajectories of the plurality of ball pocket holes are spirally arranged on the annular circumferential wall of the sealing frame, a steel ball is rolled in each ball pocket hole, a toothed ring is respectively inserted at both axial ends of the sealing frame, and at least a portion of the sealing frame passes through the toothed ring and is inserted on the cover plate.

[0009] Therefore, the steel ball is fixed by setting a sealing frame, and the trajectory of the ball pocket hole used to fix the steel ball is spirally arranged, which plays a role similar to the internal thread of the nut to facilitate the rotation of the steel ball, thereby converting the rotational motion of the screw shaft into the linear motion of the nut, and the circulation mode is also changed to the self-rotation of the steel ball, avoiding the use of the circulation structure and the adverse conditions that are prone to occur when the steel ball contacts the circulation structure. The overall structure is simpler to operate, reducing the difficulty of processing and installation, and removing the circulation structure also reduces noise in operation to a certain extent; the axial ends of the sealing frame are inserted into the toothed ring to fix the sealing frame axially and circumferentially, and a cover plate is sleeved on the outside of the toothed ring to further fix the toothed ring axially. At least a part of the sealing frame passes through the toothed ring and is inserted into the cover plate, so that the sealing frame is circumferentially fixed relative to the cover plate.

[0010] Furthermore, the sealing frame includes a plurality of retaining frames arranged in a ring array with a gap between adjacent retaining frames, and both axial ends of each retaining frame are plugged into the toothed ring, thereby fixing the sealing ring axially and circumferentially.

[0011] Furthermore, one of the retaining frames is provided with an extended end at each of its axial ends, and the extended end passes through the toothed ring and is plugged into the cover plate, thereby achieving circumferential fixation between the sealing frame and the cover plate.

[0012] Furthermore, the outer circumference of the toothed ring is provided with a plurality of latching teeth, and a slot is formed between two adjacent latching teeth, and each retainer is inserted into one of the slots. Thus, the retainer and the toothed ring are prevented from rotating by inserting the retainer into the slot, thereby forming a circumferential limit for the retainer.

[0013] Furthermore, each retainer is provided with a plug connector at each axial end, which is plugged into the plug slot, and the extended end passes through the plug slot and is then plugged into the cover plate. Thus, the circumferential ends of the plug slot abut against the circumferential ends of the plug connector, thereby forming an anti-rotation feature between the retainer and the toothed ring, forming a circumferential limit for the retainer, and thus ensuring the stability and performance of the sealing frame.

[0014] Furthermore, the plug connector includes a first portion and a second portion, the first portion and the second portion being perpendicularly connected to form an "L"-shaped structure. The first portion is inserted into the plug slot, with the circumferential ends of the plug slot corresponding to the circumferential ends of the first portion, and the second portion abuts against the end face of the toothed ring facing the seal frame. Thus, the circumferential ends of the first portion abut against the circumferential ends of the plug slot to form a circumferential limit for the retainer, and the second portion abuts against the end face of the toothed ring facing the seal frame to form an axial limit for the retainer.

[0015] Furthermore, each retainer has multiple arcuate grooves formed axially on both sides, with the corresponding arcuate grooves on two adjacent retainers forming a ball pocket. Thus, the concave design of the arcuate grooves better positions and secures the steel balls, reduces noise generation, and prevents the balls from falling out during actual operation. Furthermore, the arcuate grooves also serve to store lubricating oil, improving the product's lubrication performance during actual use.

[0016] Furthermore, the cover plate is provided with a groove, and the toothed ring is arranged in the groove. Thus, the toothed ring is placed in the groove, which plays a role in limiting the axial and radial directions of the toothed ring.

[0017] Furthermore, the groove includes a bottom portion and a sidewall portion. The end face of the geared ring, facing away from the seal holder, abuts against the bottom portion, while the sidewall portion sleeves over the outer circumference of the geared ring. Thus, the bottom portion axially limits the geared ring, while the sidewall portion radially limits the geared ring, ensuring that the seal holder does not move axially during operation and maintaining the required coaxiality among the seal holder, geared ring, and cover plate.

[0018] Furthermore, the cover plate is provided with a mounting hole, which is axially arranged from the end surface of the cover plate, thereby achieving axial fixation between the cover plate and the end surface of the nut through the mounting hole.

[0019] Furthermore, the cover plate is provided with an engagement hole, which is arranged axially from the end surface of the cover plate. At least a portion of the seal frame extends through the toothed ring and is inserted into the engagement hole. Thus, the engagement hole provides axial positioning between the cover plate and the seal frame. When the cover plate and the nut are axially secured, the axial securing force can be transmitted to the portion of the cover plate and the seal frame that is engaged.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] (1) The steel ball is fixed by setting a sealing frame, and the trajectory of the ball pocket hole used to fix the steel ball is arranged in a spiral, which plays a role similar to the internal thread of the nut, so as to facilitate the rotation of the steel ball, thereby converting the rotational motion of the screw shaft into the linear motion of the nut, and the circulation mode is also changed to the self-rotation of the steel ball, avoiding the use of the circulation structure and the adverse conditions that are easy to occur when the steel ball contacts the circulation structure. The overall structure is more simple to operate, reducing the difficulty of processing and installation, and removing the circulation structure also reduces noise in operation to a certain extent;

[0022] (2) The axial ends of the sealing frame are inserted into the toothed ring to fix the sealing frame axially and circumferentially, and a cover plate is sleeved on the outside of the toothed ring to further fix the toothed ring axially. At least a portion of the sealing frame passes through the toothed ring and is inserted into the cover plate, so that the sealing frame is circumferentially fixed relative to the cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 This is an explosion diagram of the utility model;

[0026] Figure 3 This is a structural diagram of the sealing frame of the present utility model;

[0027] Figure 4 This is a schematic structural diagram of the toothed ring of the present invention;

[0028] Figure 5 This is a structural diagram of the cover plate of the present utility model;

[0029] Figure 6 for Figure 5 Front view of

[0030] Figure 7 for Figure 5 rear view.

[0031] In the figure: 1, cover plate; 101, groove; 1011, bottom portion; 1012, side wall portion; 102, mounting hole; 103, fitting hole;

[0032] 2. Toothed ring; 201. Clamping teeth; 202. Connecting slot;

[0033] 3. Sealing frame; 301. Ball pocket hole; 3011. Arc groove; 302. Retaining frame; 303. Extended end; 304. Plug connector; 3041. First part; 3042. Second part. DETAILED DESCRIPTION

[0034] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] like Figures 1 to 7 As shown, it is the optimal embodiment of the present utility model. A nut retainer structure of this embodiment includes: a cover plate 1, a toothed ring 2 and a sealing frame 3. The cover plate 1 is sleeved on the outside of the toothed ring 2; the sealing frame 3 is provided with a plurality of ball pocket holes 301 for fixing steel balls, and the trajectories of the plurality of ball pocket holes 301 are spirally arranged on the annular circumferential wall of the sealing frame 3. A steel ball is rolled in each ball pocket hole 301. A toothed ring 2 is respectively inserted at both axial ends of the sealing frame 3. At least a portion of the sealing frame 3 passes through the toothed ring 2 and is inserted on the cover plate 1.

[0038] Therefore, the steel ball is fixed by setting the ball pocket hole 301 on the sealing frame 3, avoiding mutual squeezing and wear between the steel balls, and reducing working noise. The trajectory of the ball pocket hole 301 used to fix the steel ball is arranged in a spiral manner, which plays a role similar to the internal thread of the nut, so as to facilitate the rotation of the steel ball, thereby converting the rotational motion of the screw shaft into the linear motion of the nut, and the circulation mode is also changed to the self-rotation of the steel ball, avoiding the use of the circulation structure, and avoiding the adverse conditions that are prone to occur when the steel ball contacts the circulation structure. The overall structure is simpler to operate, reducing the difficulty of processing and installation, and removing the circulation structure also reduces noise in operation to a certain extent; the axial ends of the sealing frame 3 are inserted into the toothed ring 2 to fix the sealing frame 3 axially and circumferentially, and a cover plate 1 is sleeved on the outside of the toothed ring 2 to further fix the toothed ring 2 axially. At least a portion of the sealing frame 3 passes through the toothed ring 2 and is inserted into the cover plate 1, so that the sealing frame 3 is circumferentially fixed relative to the cover plate 1.

[0039] In this embodiment, the cover plate 1 is an integrated structure.

[0040] In this embodiment, the toothed ring 2 is an integrated structure.

[0041] In this embodiment, the sealing frame 3 includes a plurality of retaining frames 302 arranged in a ring-shaped array with gaps between adjacent retaining frames 302. Both axial ends of each retaining frame 302 are plugged into a toothed ring 2. Thus, the sealing ring is fixed axially and circumferentially.

[0042] In this embodiment, one of the retaining frames 302 is provided with an extended end 303 at both axial ends, and the extended end 303 passes through the toothed ring 2 and is plugged into the cover plate 1. Thus, the sealing frame 3 and the cover plate 1 are circumferentially fixed.

[0043] In this embodiment, the outer circumference of the toothed ring 2 is provided with a plurality of latching teeth 201. An insertion slot 202 is formed between two adjacent latching teeth 201. Each retainer 302 is inserted into an insertion slot 202. Thus, the engagement of the retainer 302 with the insertion slot 202 prevents rotation between the retainer 302 and the toothed ring 2, thereby providing circumferential positioning for the retainer 302.

[0044] In this embodiment, the plurality of latch teeth 201 are arranged in a ring array.

[0045] In this embodiment, each retainer 302 is provided with a plug connector 304 at each axial end. The plug connector 304 is inserted into the insertion slot 202, and the circumferential ends of the insertion slot 202 abut against the circumferential ends of the plug connector 304. Thus, by abutting the circumferential ends of the insertion slot 202 against the circumferential ends of the plug connector 304, an anti-rotation mechanism is formed between the retainer 302 and the geared ring 2, forming a circumferential limit for the retainer 302, thereby ensuring the stability and performance of the sealing frame 3.

[0046] In this embodiment, the plug connector 304 comprises a first portion 3041 and a second portion 3042, which are vertically connected. The plug connector 304 has an L-shaped structure. The first portion 3041 mates with the insertion groove 202, with the circumferential ends of the insertion groove 202 correspondingly abutting the circumferential ends of the first portion 3041. The second portion 3042 abuts the end surface of the geared ring 2 facing the seal frame 3. Thus, the circumferential ends of the first portion 3041 abut against the circumferential ends of the insertion groove 202, thereby circumferentially limiting the retainer 302. The second portion 3042 abuts against the end surface of the geared ring 2 facing the seal frame 3, thereby limiting the retainer 302 in the axial direction.

[0047] In this embodiment, a plurality of arcuate grooves 3011 are axially defined on both sides of each retainer 302. The corresponding arcuate grooves 3011 on two adjacent retainers 302 form a ball pocket 301. Thus, the concave design of the arcuate grooves 3011 better positions and secures the steel balls, reduces noise generation, and prevents the steel balls from falling out during actual operation. Furthermore, the arcuate grooves 3011 also serve to store lubricating oil, improving the product's lubrication performance during actual use.

[0048] In this embodiment, a groove 101 is formed on the cover plate 1, and the toothed ring 2 is disposed in the groove 101. Thus, the toothed ring 2 is placed in the groove 101, which serves to limit the toothed ring 2 in the axial and radial directions.

[0049] In this embodiment, groove 101 includes a bottom portion 1011 and a sidewall portion 1012. The end surface of geared ring 2, facing away from seal holder 3, abuts against bottom portion 1011, while sidewall portion 1012 sleeves over the outer circumference of geared ring 2. Thus, bottom portion 1011 axially limits geared ring 2, while sidewall portion 1012 radially limits geared ring 2, ensuring that seal holder 3 does not move axially during operation and maintaining the required coaxiality among seal holder 3, geared ring 2, and cover plate 1.

[0050] In this embodiment, a mounting hole 102 is formed on the cover plate 1 and is axially arranged from the end surface of the cover plate 1. Thus, the cover plate 1 and the end surface of the nut are axially fixed through the mounting hole 102.

[0051] In this embodiment, the cover plate 1 is provided with an engagement hole 103, which is arranged axially from the end surface of the cover plate 1. At least a portion of the seal holder 3 extends through the toothed ring 2 and is inserted into the engagement hole 103. Thus, the engagement hole 103 provides axial restraint between the cover plate 1 and the seal holder 3. When the cover plate 1 and the nut are axially secured, the axial securing force can be transmitted to the portion of the cover plate 1 and the seal holder 3 that are engaged.

[0052] Specifically, the assembly steps of this embodiment are as follows: first, the plug connectors 304 at both axial ends of each retaining frame 302 are inserted into a plug-in groove 202, so that the sealing frame 3 is arranged in a ring shape; then, a steel ball is installed in each ball pocket hole 301, so that the arrangement trajectory of the steel ball on the sealing frame 3 is a spiral structure; finally, the toothed ring 2 is installed in the groove 101 on the cover plate 1, and the extended end 303 of the retaining frame 302 is inserted into the fitting hole 103 of the cover plate 1 after passing through the plug-in groove 202; the nut retainer is assembled after the above steps, and the nut retainer is arranged inside the nut, and the nut retainer is axially fixed to the end face of the nut through the mounting hole 102, and then the nut retainer is sleeved on the screw shaft so that the spherical surface of the steel ball contacts the internal thread groove of the nut and the external thread groove of the screw shaft.

[0053] In summary, the unique design of the sealing frame 3 of the present invention avoids the use of a circulation structure, the overall structure is simpler to operate, and the processing difficulty and installation difficulty are reduced. In terms of processing, the requirements for the mold are reduced, the mold opening cost is saved, and the processing efficiency is improved. In terms of design, the circulation mode is changed to the self-rotation mode of the steel ball, and the concave design of the arc-shaped groove 3011 can better position and fix the steel ball, reduce the noise generation, and ensure that the steel ball will not fall off during actual operation. The design of the arc-shaped groove 3011 can also serve as a storage oil, thereby improving the lubrication performance of the product in actual use. In terms of connection mode, the plug-in mode between the retaining frame 302 and the toothed ring 2, and the installation mode between the toothed ring 2 and the cover plate 1, realize axial, axial and radial limiting, so that the retainer as a whole becomes a detachable integrated structure, which is easy to disassemble and assemble, and reduces the difficulty of installation.

[0054] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of this utility model. The technical scope of this utility model is not limited to the content of the specification and must be determined according to the scope of the claims.

Claims

1. A nut retainer structure, characterized in that: include: Cover plate (1); A toothed ring (2), wherein the cover plate (1) is sleeved on the outside of the toothed ring (2); A sealing frame (3) is provided with a plurality of ball pocket holes (301) for fixing steel balls, the tracks of the plurality of ball pocket holes (301) are spirally arranged on the annular peripheral wall of the sealing frame (3), a steel ball is rollingly arranged in each ball pocket hole (301), a toothed ring (2) is respectively inserted at both axial ends of the sealing frame (3), and at least a portion of the sealing frame (3) passes through the toothed ring (2) and is inserted on the cover plate (1).

2. A nut retainer structure according to claim 1, characterized in that: The sealing frame (3) comprises a plurality of retaining frames (302), the plurality of retaining frames (302) being arranged in a ring-shaped array, with a gap between two adjacent retaining frames (302), and both axial ends of each retaining frame (302) being plugged into the toothed ring (2).

3. A nut retainer structure according to claim 2, characterized in that: One of the retaining frames (302) is provided with extended ends (303) at both axial ends, and the extended ends (303) pass through the toothed ring (2) and are plugged onto the cover plate (1).

4. A nut retainer structure according to claim 3, characterized in that: The outer periphery of the toothed ring (2) is convexly provided with a plurality of latching teeth (201), an inserting groove (202) is formed between two adjacent latching teeth (201), and each retaining frame (302) is inserted into one of the inserting grooves (202).

5. A nut retainer structure according to claim 4, characterized in that: Each retaining frame (302) is provided with a plug connector (304) at both axial ends, the plug connector (304) is plugged into the plug slot (202), and the extended end (303) passes through the plug slot (202) and is plugged into the cover plate (1).

6. A nut retainer structure according to claim 5, characterized in that: The plug connector (304) comprises a first part (3041) and a second part (3042), wherein the first part (3041) and the second part (3042) are vertically connected to form an "L"-shaped structure, wherein the first part (3041) is plugged into the plug slot (202), and the circumferential ends of the plug slot (202) abut against the circumferential ends of the first part (3041), and the second part (3042) abuts against an end face of the toothed ring (2) facing the sealing frame (3).

7. The nut retainer structure according to claim 2, characterized in that: A plurality of arc-shaped grooves (3011) are respectively provided on both sides of each retaining frame (302) along the axial direction, and the corresponding arc-shaped grooves (3011) on two adjacent retaining frames (302) form a ball pocket hole (301).

8. The nut retainer structure according to claim 1, characterized in that: The cover plate (1) is provided with a groove (101), the toothed ring (2) is arranged in the groove (101), the groove (101) comprises a bottom surface portion (1011) and a side wall portion (1012), an end surface of the toothed ring (2) facing away from the sealing frame (3) abuts against the bottom surface portion (1011), and the side wall portion (1012) is sleeved on the outer periphery of the toothed ring (2).

9. The nut retainer structure according to claim 1, characterized in that: The cover plate (1) is provided with a mounting hole (102), and the mounting hole (102) is arranged axially from the end surface of the cover plate (1).

10. The nut retainer structure according to claim 1, characterized in that: The cover plate (1) is provided with an interlocking hole (103), which is arranged axially from the end surface of the cover plate (1); at least a portion of the sealing frame (3) passes through the toothed ring (2) and is inserted into the interlocking hole (103).

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