Ball screw nut reverser structure and ball screw mechanism

Abstract

The utility model relates to a ball screw nut reverser structure and a ball screw mechanism, the ball screw nut reverser structure comprises a body and at least four pressing blocks, one end of each pressing block is fixedly connected to the installation side of the body and is fixedly connected to the edge end of the body, and the other end of each pressing block is fixedly connected to the installation side of the body. The other ends of the pressing blocks are used for being in interference fit with a lead screw nut, the pressing blocks are distributed at the two opposite ends of the body, and at least two pressing blocks are arranged on the same side of the body at intervals. According to the utility model, the technical problems that the existing reverser is unstable in installation and has shaking and abnormal sound in the use process can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a car steering system technical field especially relates to a ball screw nut reverser structure and ball screw mechanism. BACKGROUND

[0002] The main role of ball screw reverser is to connect the two ends of ball circulation, form a closed loop circulation, make the movement between nut and ball screw shaft become infinite circulation, do not need to interrupt or reload ball, thereby improve the stability and efficiency of mechanical equipment.

[0003] In prior art, inner circulation reverser basically adopts plastic material, it is fixed in nut through two buckle structures, and this two-point fixing mode has poor stability and is prone to skew and other problems, and metal reverser basically has gap fit without positioning fixing structure, and the steel ball will cause the reverser to vibrate back and forth during the operation of the reverser, thereby producing abnormal sound. UTILITY MODEL CONTENTS

[0004] The utility model provides a ball screw nut reverser structure and ball screw mechanism in view of the technical problem of unstable installation of the existing reverser and abnormal sound during use.

[0005] The utility model solves the above technical problems by the following technical scheme:

[0006] On the one hand, the utility model provides a ball screw nut reverser structure, which comprises a body and at least four pressing blocks, one end of each pressing block is fixedly connected to the mounting side of the body, and the other end of each pressing block is used for interference fit in the ball screw nut, the pressing blocks are distributed at opposite ends of the body, and at least two pressing blocks are arranged at intervals on the same side of the body.

[0007] The utility model has the advantages that during installation, the body is pressed and mounted in the mounting hole of the ball screw nut, during the pressing and mounting process, each pressing block simultaneously forms interference fit with the groove wall of the mounting hole until the pressing and mounting is in place, stable installation is realized, the problem of unstable installation and installation gap of the existing reverser is improved, and during use, since at least two pressing blocks are arranged at intervals on the same side of the body, the possibility of the reverser being tilted at any end is reduced, and the interference fit pressing blocks at the other end can offset the force causing tilting and misalignment, so that the at least four pressing blocks ensure that the reverser is assembled without tilting and misalignment, and the technical problem of abnormal sound during use of the reverser is improved.

[0008] On the basis of the above technical scheme, the utility model can be further improved as follows.

[0009] Further, each of the pressing blocks comprises a fixed plate fixedly connected to the mounting side of the body and a pressing plane structure fixedly connected to the outer side of the fixed plate, each of the pressing plane structures being close to the other end of the corresponding fixed plate and protruding from the corresponding fixed plate.

[0010] The beneficial effect of the above further scheme is that when the body is pressed into the mounting hole of the screw nut, the pressing plane structure of each pressing block forms an interference fit with the groove wall of the mounting hole until it is pressed into place, achieving stable installation and improving the existing problems of unstable installation and installation gap of the reverser; during use, since the planes where each pressing plane structure is located are all protruding from the corresponding fixed plate, a gap can be formed between the fixed plate and the groove wall of the mounting hole, forming a certain elastic deformation space, facilitating the deformation and pressing of the pressing block into place, and at the same time, the vibration generated by the rolling of the ball can be buffered, absorbed and energy dispersed, improving the stability and durability of the structure.

[0011] Further, one end of each of the fixed plates located on opposite sides of the body is close to each other, and the other end is far away from each other.

[0012] The beneficial effect of the above further scheme is that the other end of each of the opposite fixed plates is far away from each other, so that the distance between the other end of each of the opposite fixed plates is increased, forming an "eight" shape structure, to ensure that when each fixed plate is inserted into the mounting hole of the screw nut, each pressing plane structure can form a stable interference fit installation structure with the mounting hole of the screw nut.

[0013] Further, the outer side of each of the fixed plates is provided with a guide surface, and each of the guide surfaces is connected to the other end of the corresponding fixed plate and the corresponding pressing plane structure.

[0014] The beneficial effect of the above further scheme is that when each fixed plate is inserted into the mounting hole of the screw nut, each guide surface first contacts the slot of the mounting hole to form a guiding effect, so that each fixed plate is smoothly inserted into the mounting hole of the screw nut, and the pressing plane structure forms an interference fit with the mounting hole of the screw nut, ensuring stable installation of the reverser.

[0015] Further, the four pressing blocks are provided, and two of the pressing blocks are spaced apart on opposite ends of the body.

[0016] The beneficial effect of the above further scheme is that the reverser is pressed into the mounting hole of the screw nut by the four pressing blocks, and four-point contact is used to ensure that the reverser is assembled without skewing, mispositioning and other phenomena.

[0017] Further, a plurality of reinforcing plates are arranged, one end of each of the reinforcing plates is fixedly connected to the mounting side of the body, and the other end of each of the reinforcing plates is fixedly connected to the edge end of the body, each of the reinforcing plates is arranged between two adjacent pressing blocks, and a gap is formed between each of the reinforcing plates and the corresponding pressing block.

[0018] The beneficial effect of the above further scheme is that the structure strength and rigidity of the entire reverser are improved by each of the reinforcing plates, so that the stress acting on the edge of the body is more evenly distributed, avoiding stress concentration at the contact point of the pressing block and the body, reducing the risk of structure failure caused by excessive local stress, prolonging the service life of the connecting structure, and ensuring the normal work of the entire structure.

[0019] Further, an inclined surface is arranged on the other end of each of the reinforcing plates.

[0020] The beneficial effect of the above further scheme is that when the pressing block is deformed and enters the mounting hole of the lead screw nut during installation, the inclined surface can contact the notch of the mounting hole to form a guiding effect, so that each reinforcing plate is smoothly inserted into the mounting hole of the lead screw nut to smoothly complete the installation.

[0021] Further, the opposite ends of the body are provided with limiting blocks, both of the limiting blocks are arranged to be pressed into the threaded grooves of the lead screw nut, and one end of each of the limiting blocks is fixedly connected to the mounting side of the body.

[0022] The beneficial effect of the above further scheme is that when the body is pressed into the mounting hole of the lead screw nut, so that each pressing block simultaneously forms an interference fit with the groove wall of the mounting hole, both of the limiting blocks simultaneously enter the two threaded grooves, forming an axial limiting effect on the installation of the reverser, preventing installation skewing and misalignment, and improving the installation stability of the reverser.

[0023] Further, the other end of each of the limiting blocks is fixedly connected to a limiting layer, and the limiting layers are arranged to abut against the threaded grooves at different positions of the lead screw nut.

[0024] The beneficial effect of the further scheme is that when the limiting blocks are pressed into the threaded grooves, the two limiting layers abut against the corresponding threaded grooves downward, so as to ensure the stable installation of the reverser; at this time, under the support of the limiting layers, the corresponding limiting blocks form a suspended structure, and when external force acts, such as vibration, impact, etc., the end, i.e. the root, of the suspended limiting block forms a certain elastic deformation space, which plays a buffering and damping effect, and meanwhile, the suspension of the root of the limiting block can make the connection between the body and the lead screw nut more smooth, so as to provide a smoother rolling path for the steel ball, and the steel ball will not be hindered or generate unnecessary friction due to the rigid connection between the root of the limiting block and other parts.

[0025] In addition, the utility model provides a kind of ball screw mechanism, including the ball screw nut reverser structure, still including screw nut, the screw nut is equipped with mounting hole, each the pressing block of the ball screw nut reverser structure is interference fit in the slot wall of the mounting hole of screw nut. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the first perspective installation structure diagram of the reverser of the utility model;

[0027] Figure 2 It is the second perspective installation structure diagram of the reverser of the utility model;

[0028] Figure 3 It is the installation structure sectional view of the reverser of the utility model;

[0029] Figure 4 It is the first scheme structure diagram of the reverser of the utility model;

[0030] Figure 5 It is the structure diagram of another perspective of Figure 4 ; It is the second scheme structure diagram of the reverser of the utility model.

[0031] Figure 6 It is the second scheme structure diagram of the reverser of the utility model.

[0032] In the drawings, the component list represented by each sign is as follows:

[0033] 1, body;11, reverse arc groove;

[0034] 2, pressing block;21, fixed plate;211, guide surface;22, pressing plane structure;

[0035] 3, reinforcing plate;31, gap;32, inclined surface;

[0036] 4, limiting block;41, limiting layer;

[0037] 5, screw nut;51, mounting hole;52, threaded groove. Detailed Implementation

[0038] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0039] On the one hand, this utility model provides a ball screw nut reversing device structure, as described below.

[0040] Example 1

[0041] like Figures 1 to 6 A ball screw nut reversing device structure includes a body 1 and at least four pressure blocks 2. One end of each pressure block 2 is fixedly connected to the mounting side of the body 1 and to the edge end of the body 1. The other end is used for interference fit with the screw nut 5. Each pressure block 2 is distributed at opposite ends of the body 1, and at least two pressure blocks 2 located on the same side of the body 1 are spaced apart.

[0042] The beneficial effects of this embodiment are as follows: During installation, the main body 1 is pressed into the mounting hole 51 of the lead screw nut 5. During the pressing process, each pressing block 2 simultaneously forms an interference fit with the groove wall of the mounting hole 51 until it is pressed into place, achieving stable installation and improving the problem of unstable installation and installation gap in the existing reverser. During use, since at least two pressing blocks 2 are spaced apart on the same side of the main body 1, the possibility of the reverser tilting due to force on either end is reduced. The pressing blocks 2 with interference fit on the other end can counteract the force that causes skewness or misalignment. Thus, the at least four pressing blocks 2 ensure that the reverser is assembled without skewness or misalignment, and improve the technical problem of vibration and abnormal noise in the reverser during use.

[0043] Based on the above embodiment, the working side of the main body 1 is provided with a reverse arc groove 11. The two ends of the reverse arc groove 11 are respectively connected to one of the thread grooves 52 of the lead screw nut 5, and the two thread grooves 52 are adjacent to each other to connect the two ends of the ball circulation to form a closed loop, so that the movement between the nut and the ball screw shaft becomes an infinite loop.

[0044] Furthermore, the other two opposite sides of the main body 1 are both arc-shaped surfaces, and the two ends of the reverse arc groove 11 respectively pass through one of the arc-shaped surfaces. Thus, after the main body 1 is pressed in, an arc-shaped contact surface is formed at the connection between the reverse arc groove 11 and the threaded groove 52, and the contact with the ball is an arc-shaped contact line, so that the contact between the ball and the arc-shaped contact line is minimized per unit time. In this way, the ball can smoothly roll between the reverse arc groove 11 and the threaded groove 52, and reduce noise and vibration.

[0045] Example 2

[0046] likeFigures 4 to 6 In the embodiment 1, each pressing block 2 comprises a fixed plate 21 fixedly connected to the mounting side of the body 1 and a pressing plane structure 22 fixedly connected to the outer side of the fixed plate 21, each pressing plane structure 22 is close to the other end of the corresponding fixed plate 21, and the plane structure 22 is protruded from the corresponding fixed plate 21.

[0047] The beneficial effect of the preferred scheme in the above embodiment is that when the body 1 is pressed into the mounting hole 51 of the screw nut 5, the pressing plane structure 22 of each pressing block 2 forms an interference fit with the groove wall of the mounting hole 51 until it is pressed into place, achieving stable installation and improving the existing problem of unstable installation and installation gap of the reverser; during use, since the plane where each pressing plane structure 22 is located is protruded from the corresponding fixed plate 21, a gap can be formed between the fixed plate 21 and the groove wall of the mounting hole 51, forming a certain elastic deformation space, facilitating the deformation and pressing of the pressing block 2 into place, and at the same time, the vibration generated by the rolling of the ball can be buffered, absorbed and energy dispersed, improving the stability and durability of the structure.

[0048] As one of the parallel schemes of the above embodiment, as shown in Figure 4 and Figure 5 , the thickness of the fixed plate 21 gradually increases from one end to the other end, reaching the maximum at the position of the pressing plane structure 22.

[0049] As the second parallel scheme of the above embodiment, as shown in Figure 6 , the thickness of the fixed plate 21 gradually decreases from one end to the other end, and the pressing plane structure 22 is a boss structure protruded from the corresponding fixed plate 21.

[0050] Embodiment 3

[0051] As shown in Figures 4 to 6 , on the basis of the embodiments 1 and 2, the one end of each fixed plate 21 located on both sides of the body 1 and opposite to each other is close to each other, and the other end is far away from each other.

[0052] The beneficial effect of the preferred scheme in the above embodiment is that the other end of each fixed plate 21 is far away from each other, so that the distance between the other end of each fixed plate 21 is increased, showing an "eight" shape structure, so as to ensure that when each fixed plate 21 is inserted into the mounting hole 51 of the screw nut 5, each pressing plane structure 22 can form a stable interference fit installation structure with the mounting hole 51 of the screw nut 5.

[0053] Embodiment 4

[0054] As shown in Figures 4 to 6On the basis of the embodiments 1-3, the outer side of each fixed plate 21 is provided with a guide surface 211, and each guide surface 211 is connected to the other end of the corresponding fixed plate 21 and the corresponding pressure plane structure 22.

[0055] The beneficial effect of the preferred scheme in the above embodiments is that, when each fixed plate 21 is inserted into the mounting hole 51 of the screw nut 5, the guide surface 211 is first in contact with the notch of the mounting hole 51 to form a guide effect, so that each fixed plate 21 is smoothly inserted into the mounting hole 51 of the screw nut 5, and the pressure plane structure 22 is in interference fit with the mounting hole 51 of the screw nut 5, ensuring the stable installation of the reverser.

[0056] As one of the parallel schemes of the above embodiments, as Figure 4 and Figure 5 The guide surface 211 is an arc surface structure.

[0057] As the second parallel scheme of the above embodiments, as Figure 6 The guide surface 211 is an inclined inclined surface structure.

[0058] Embodiment 5

[0059] As Figures 4 to 6 On the basis of the embodiments 1-4, the pressing block 2 is provided with four, and the body 1 is provided with two pressing blocks 2 at the opposite ends.

[0060] The beneficial effect of the preferred scheme in the above embodiments is that the reverser is pressed into the mounting hole 51 of the screw nut 5 by the four pressing blocks 2, and the four-point contact ensures that the reverser is not skewed, misaligned, etc.

[0061] As a parallel scheme of the above embodiments, the pressing block 2 can also be 5, 6, 7, 8, etc.

[0062] Embodiment 6

[0063] As Figures 3 to 6 On the basis of the embodiments 1-5, the ball screw nut reverser structure further comprises a plurality of reinforcing plates 3, one end of each reinforcing plate 3 is fixedly connected to the mounting side of the body 1, and is fixedly connected to the edge end of the body 1, each reinforcing plate 3 is arranged between the adjacent two pressing blocks 2, and a gap 31 is formed between each reinforcing plate 3 and the corresponding pressing block 2.

[0064] The beneficial effect of the preferred solution in the above embodiments is that the structural strength and rigidity of the entire reverser are improved by each reinforcing plate 3, so that the stress acting on the edge of the body 1 is more evenly distributed, avoiding stress concentration at the contact point of the pressure block 2 and the body 1, reducing the risk of structural failure caused by excessive local stress, prolonging the service life of the connecting structure, and at the same time, during installation and use, when the pressure block 2 deforms and forms an interference fit with the mounting hole 51 of the lead screw nut 5, each reinforcing plate 3 can limit the excessive deformation, ensure the tightness and stability of the connection, and ensure the normal operation of the entire structure.

[0065] During use, each gap 31 can ensure independent deformation of each pressure block 2 and reinforcing plate 3, reducing installation difficulty and facilitating independent maintenance, and the gap 31 can provide a buffer space for the pressure block 2 to deform slightly under external force or interference fit, avoiding additional stress between the pressure block 2 and the reinforcing plate 3 due to mutual extrusion, preventing damage to the pressure block 2 and the reinforcing plate 3 due to stress accumulation, and improving the reliability of the connection.

[0066] Based on the above embodiments, each reinforcing plate 3 at opposite ends of the body 1 is a straight plate structure, and each reinforcing plate 3 at the other opposite ends of the body 1 is an arc-shaped plate structure adapted to the groove wall of the mounting hole 51.

[0067] Embodiment 7

[0068] As Figures 4 to 6 Based on embodiments 1-6, an inclined surface 32 is provided on the other end of each reinforcing plate 3.

[0069] The beneficial effect of the preferred solution in the above embodiments is that when the installation is performed and each pressure block 2 deforms and enters the mounting hole 51 of the lead screw nut 5, the inclined surface 32 can contact the groove of the mounting hole 51 to form a guiding effect, so that each reinforcing plate 3 is smoothly inserted into the mounting hole 51 of the lead screw nut 5, to smoothly complete the installation.

[0070] Embodiment 8

[0071] As Figures 1 to 6 Based on embodiments 1-7, a limiting block 4 is provided at opposite ends of the body 1, both limiting blocks 4 are pressed into the threaded groove 52 of the lead screw nut 5, and one end is fixedly connected to the mounting side of the body 1.

[0072] The beneficial effect of the preferred solution in the above embodiment is that when the body 1 is pressed into the mounting hole 51 of the screw nut 5 so that each pressing block 2 simultaneously forms an interference fit with the groove wall of the mounting hole 51, the two limiting blocks 4 simultaneously enter the two threaded grooves 52, thereby forming an axial limiting effect on the installation of the reverser, preventing installation skewing and mispositioning, and improving the installation stability of the reverser.

[0073] On the basis of the above embodiment, the two limiting blocks 4 are arranged in parallel.

[0074] Embodiment 9

[0075] As Figures 4 to 6 On the basis of embodiments 1-8, the other end of each of the two limiting blocks 4 is fixedly connected to a limiting layer 41, and the two limiting layers 41 are used to abut against the threaded grooves 52 at different positions of the screw nut 5.

[0076] The beneficial effect of the preferred solution in the above embodiment is that when the limiting block 4 is pressed into the threaded groove 52, the two limiting layers 41 abut downward against the corresponding threaded groove 52, thereby ensuring stable installation of the reverser; at this time, under the supporting action of the limiting layer 41, the corresponding limiting block 4 forms a suspended structure, and when an external force acts, such as vibration, impact, etc., the suspended end, i.e., the root of the limiting block 4, forms a certain elastic deformation space, thereby achieving a buffering and shock-absorbing effect, and at the same time, the suspension of the root of the limiting block 4 can make the junction between the body 1 and the screw nut 5 have a smoother transition, thereby providing a smoother rolling path for the steel ball, and the steel ball will not be hindered or generate unnecessary friction due to the rigid connection of the root of the limiting block 4 with other parts during rolling.

[0077] Among them, the two limiting layers 41 specifically abut against the side wall positions of the corresponding threaded grooves 52.

[0078] On the other hand, the utility model provides a ball screw mechanism, and specific see following elaboration.

[0079] Embodiment 10

[0080] A ball screw mechanism, as Figures 1 to 3 , comprising the ball screw nut reverser structure as described in embodiments 1-9, further comprising a screw nut 5, the screw nut 5 is provided with a mounting hole 51, and each pressing block 2 of the ball screw nut reverser structure is interference-fitted to the groove wall of the mounting hole 51 of the screw nut 5.

[0081] On the basis of the above embodiment, the screw nut 5 is provided with threaded grooves 52, and the two limiting blocks 4 of the ball screw nut reverser structure are pressed into the adjacent threaded grooves 52.

[0082] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0083] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0084] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0085] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0086] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0087] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A ball screw nut reverser structure, characterized by, The body (1) and at least four pressing blocks (2), one end of each of the pressing blocks (2) is fixedly connected to the mounting side of the body (1), and is fixedly connected to the edge end of the body (1), the other end is used for interference fit in the screw nut (5), each of the pressing blocks (2) is distributed at the opposite two ends of the body (1), and at least two of the pressing blocks (2) located at the same side of the body (1) are spaced apart.

2. The ball screw nut reverser structure according to claim 1, wherein Each of the pressing blocks (2) comprises a fixed plate (21) fixedly connected to the mounting side of the body (1) and a pressing plane structure (22) fixedly connected to the outer side of the fixed plate (21), each of the pressing plane structures (22) is close to the other end of the corresponding fixed plate (21) and protrudes from the corresponding fixed plate (21).

3. The ball screw nut reverser structure according to claim 2, wherein The opposite ends of each of the fixed plates (21) located at the two sides of the body (1) are close to each other.

4. The ball screw nut reverser structure according to claim 2, wherein The outer side of each of the fixed plates (21) is provided with a guide surface (211), and each of the guide surfaces (211) is connected to the other end of the corresponding fixed plate (21) and the corresponding pressing plane structure (22).

5. The ball screw nut reverser structure according to claim 1, wherein The pressing blocks (2) are provided with four, and the opposite two ends of the body (1) are spaced apart by two pressing blocks (2).

6. The ball screw nut reverser structure according to claim 1, wherein It also comprises a plurality of reinforcing plates (3), one end of each of the reinforcing plates (3) is fixedly connected to the mounting side of the body (1), and is fixedly connected to the edge end of the body (1), each of the reinforcing plates (3) is spaced apart between the adjacent two pressing blocks (2), and a gap (31) is formed between each of the reinforcing plates (3) and the corresponding pressing block (2).

7. The ball screw nut reverser structure according to claim 6, wherein The other end of each of the reinforcing plates (3) is provided with an inclined surface (32).

8. The ball screw nut reverser structure according to any one of claims 1 to 7, characterized by, The opposite two ends of the body (1) are provided with limiting blocks (4), the two limiting blocks (4) are used for pressing into the thread groove (52) of the screw nut (5), and one end is fixedly connected to the mounting side of the body (1).

9. The ball screw nut reverser structure according to claim 8, wherein The other end of the two limiting blocks (4) is fixedly connected with a limiting layer (41), and the two limiting layers (41) are used for abutting against the thread grooves (52) at different positions of the screw nut (5).

10. A ball screw mechanism characterized by comprising: The ball screw nut reverser structure comprises the ball screw nut reverser structure according to any one of claims 1-9, and further comprises a screw nut (5), the screw nut (5) is provided with a mounting hole (51), and each of the pressing blocks (2) of the ball screw nut reverser structure is interference fit in the groove wall of the mounting hole (51) of the screw nut (5).

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