Internal circulation ball screw pair structure

Abstract

The invention discloses an internal circulation ball screw pair structure, and particularly relates to the technical field of ball screw pairs, which comprises a screw body, a nut body, a steel ball, a reverser body, a guide assembly and a positioning assembly, a groove is formed in the nut body; six ball return grooves are uniformly formed in one side of the reverser body; according to the ball screw pair of the single-ring internal circulation one-way array type reverser, a plurality of groups of oblate reversers are omitted, the ball return grooves are integrally arranged on the reverser body, and steel balls are forced to roll for a circle along a raceway and then climb over the crest of threads of the raceway of the screw body under the action of the ball return grooves on the reverser body, so that the steel balls are driven to rotate for a long time; according to the design, assembly is simple, a reverser does not need to be assembled repeatedly, steel balls are arranged more compactly, space is saved, the bearing capacity is larger, impact vibration borne by the steel balls in the lead screw body is smaller, movement is more stable, and the problems of abnormal sound and jamming in the transmission process of the lead screw body are solved.

Description

Technical Field

[0001] This invention relates to the field of ball screw pair technology, and more specifically, to an internal circulation ball screw pair structure. Background Technology

[0002] Internal circulation ball screw pairs are a type of ball circulation system where the balls never leave the screw surface during the circulation process. The balls are guided to circulate along the thread raceway by a reversing device. Internal circulation ball screw pairs are widely used in industries such as automotive, aerospace, robotics, nuclear power, and precision instruments due to their small size, high transmission efficiency, and good synchronization performance.

[0003] For example, Chinese utility model patent CN208858883U discloses a ball screw assembly structure, including a ball screw and a screw nut. The ball screw and screw nut are interlocked. The inner ring of the screw nut is provided with a ball mounting ring. The ball mounting ring has several evenly distributed ball groove groups inside. Each ball groove group consists of five ball grooves. The two ends of the ball grooves are respectively provided with a first opening and a second opening. Balls are engaged and connected inside the ball grooves. This utility model ball screw assembly structure reduces the number of balls, and all balls are engaged and fixed in the ball grooves. The screw nut stores lubricating oil, which automatically lubricates the balls, reducing the friction coefficient between the ball screw and the screw nut. When the ball screw rotates, the frictional resistance is low, and less torque can be used to drive the ball screw to rotate, improving the working efficiency of the ball screw assembly. The balls can be replaced, reducing the maintenance cost of the ball screw assembly, and maintenance is simple and convenient.

[0004] The internal circulation ball screw pair mainly consists of four parts: screw, nut, steel balls, and reverser. The reverser is installed inside the nut to form a ball circulation chain, enabling the balls to circulate repeatedly during operation. The structure of the reverser not only affects the external structure of the nut of the internal circulation ball screw pair, but also has a significant impact on the overall transmission efficiency, load-bearing capacity, service life, transmission performance, and ball smoothness of the internal circulation ball screw pair.

[0005] The internal circulation ball screw assembly structure currently used in the industry consists of circumferentially arranged inserts, which is difficult to manufacture, has low assembly efficiency, and a large part of the raceway cannot be filled with steel balls, thus limiting the load-bearing capacity of the screw assembly. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides an internal circulation ball screw pair structure. The technical problem to be solved by the present invention is that the internal circulation ball screw pair structure currently used in the industry is composed of circumferentially arranged inserts, which is difficult to manufacture, has low assembly efficiency, and a large part of the raceway cannot be filled with steel balls, thus limiting the load-bearing capacity of the screw pair.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an internal circulation ball screw assembly structure, comprising a screw body, a nut body, steel balls, a reverser body, a guide assembly, and a positioning assembly; the nut body is connected to the screw body via the steel balls; a groove is formed inside the nut body; the reverser body is slidably disposed within the groove via the guide assembly, and the back of the reverser body is in contact with the bottom of the groove, and the two sides of the reverser body are in clearance fit with the sides of the groove via the positioning assembly; the reverser body has a plurality of ball return grooves arranged in a linear array on the side near the screw body, and the ball return grooves have an S-shaped structure.

[0008] As a further aspect of the present invention: the guiding component includes a guiding groove and a guiding block; the guiding groove is provided in the groove; the guiding block is slidably inserted in the guiding groove and fixedly connected to the reverser body.

[0009] As a further aspect of the present invention: the guide block is an isosceles trapezoidal structure, and the dimension of the guide block on the side closer to the inverter body is smaller than the dimension of the guide block on the side farther from the inverter body.

[0010] As a further embodiment of the present invention: the positioning component includes a slot, a movable plate, a transmission block, a receiving groove, a rotating plate, a positioning groove, and a positioning block; the reverser body has a slot; the movable plate is movably disposed in the slot and connected to the reverser body through a pressing component; a plurality of transmission blocks are arranged in a linear array symmetrically on both sides of the inner wall of the slot; a plurality of receiving grooves are arranged in a linear array symmetrically on both sides of the reverser body, and the ends of the transmission blocks extend into the receiving grooves; a plurality of rotating plates are arranged in a linear array symmetrically on both sides of the inner wall of the slot via a rotating shaft, and the rotating plates are connected to the movable plate and the transmission blocks through a sliding component; a plurality of positioning grooves are arranged in a linear array symmetrically on both sides of the inner wall of the groove; the positioning block slides through the receiving groove and is fixedly connected to the end of the transmission block, and the positioning block is inserted into the positioning groove.

[0011] As a further aspect of the present invention: the rotating plate has an L-shaped structure, and the dimension of the rotating plate on the side closer to the moving plate is smaller than the dimension of the rotating plate on the side farther from the moving plate.

[0012] As a further embodiment of the present invention: the sliding assembly includes a sliding groove and a sliding block; two sliding grooves are formed on the rotating plate; the sliding block is slidably disposed in the sliding groove, and the two sliding blocks are respectively fixedly connected to the moving plate and the transmission block.

[0013] As a further aspect of the present invention: the sliding block has a T-shaped structure, the size of the sliding block on the side closer to the moving plate is smaller than the size of the sliding block on the side farther from the moving plate, and the T-shaped side of the sliding block is in contact with the side of the rotating plate.

[0014] As a further aspect of the present invention: the extrusion assembly includes a movable groove, a movable block, a connecting groove, a connecting block, a spring, a limiting groove, and a limiting block; a movable groove is provided on one side of the reverser body; the movable block slides through the movable groove, and the end of the moving plate extends through the empty groove into the movable groove; a connecting groove is provided on the side of the movable block near the moving plate; the connecting block rotatably passes through the connecting groove and is fixedly connected to the moving plate; the spring is sleeved on the moving plate, and one end of the spring is fixedly connected to the inner wall of the movable groove, and the other end contacts the movable block; a plurality of limiting grooves are provided in a circular array in the movable groove; the limiting block slides through the limiting groove and is fixedly connected to the movable block.

[0015] As a further aspect of the present invention: the connecting block has a frustum-shaped structure, and the dimension of the connecting block on the side closer to the moving plate is smaller than the dimension of the connecting block on the side farther from the moving plate.

[0016] As a further aspect of the present invention: the limiting groove includes a sliding part, a rotating part, and a limiting part; the length of the limiting part is smaller than the length of the sliding part.

[0017] The beneficial effects of this invention are as follows: This invention comprises a lead screw body, a nut body, steel balls, and a reversing mechanism body. By rotating the lead screw body, the steel balls transmit force and motion to the nut body, causing it to move. The steel balls, aided by a return groove on the reversing mechanism body (which is S-shaped in spatial curvature), are forced to roll over the tooth crests of the lead screw body's raceway and return to their initial thread raceway, forming a single-turn circulating ball chain. Compared to existing technologies, this invention designs a ball screw for a single-turn, internally circulating, unidirectional, aligned reversing mechanism. The design eliminates multiple sets of flat, round reversing devices and integrates the ball return grooves onto the reversing device body. Utilizing the ball return grooves on the reversing device body, the steel balls are forced to roll one revolution along the raceway, then roll over the thread crest of the lead screw body's raceway and return to the initial raceway, forming a complete cycle of ball connections. This design simplifies assembly, eliminating the need for repeated reversing device assembly. Furthermore, the steel balls are arranged more compactly, saving space and increasing load-bearing capacity. The steel balls experience less impact and vibration within the lead screw body, resulting in smoother movement and resolving issues such as abnormal noise and jamming during lead screw transmission.

[0018] This invention provides a guide component. By inserting a guide block into the guide block and allowing the guide block to slide within the guide block, the reverser body slides within the groove until the end face of the guide block contacts the inner sidewall of the guide block. This facilitates the sliding of the reverser body. Since the guide block has an isosceles trapezoidal structure, it also helps to restrict the lateral movement of the reverser body within the groove.

[0019] This invention, by setting a positioning component and a sliding component, moves the moving plate through the pressing component. Since the rotating plate has an L-shaped structure, the sliding block on the moving plate slides in the sliding groove on the rotating plate, causing the rotating plate to rotate in the empty groove via the rotating shaft. This causes the sliding block on the transmission block to slide in another sliding groove on the rotating plate, moving the transmission block and causing the positioning block to slide in the receiving groove and insert into the positioning groove, thus fixing the position of the reverser body in the groove and improving the stability of the reverser body position.

[0020] This invention utilizes a pressing component. By pressing the movable block, it slides within the movable groove, causing the limiting block to slide within the sliding portion. This causes the spring to contract, moving the moving plate until the limiting block reaches the intersection of the sliding and rotating portions. At this point, rotating the movable block causes it to rotate within the movable groove, the limiting block to slide within the rotating portion, and the connecting block to rotate within the connecting groove. Because the spring end is in contact with the movable block, the spring will not twist due to the rotation of the movable block. This continues until the limiting block reaches the intersection of the rotating and limiting portions. Releasing the movable block causes it to slide in the opposite direction within the movable groove under the spring's elastic force, causing the limiting block to slide within the limiting portion. This causes the moving plate to move in the opposite direction until the side of the limiting block contacts the inner wall of the limiting portion. The force generated by the spring contraction further stabilizes the position of the limiting block within the limiting portion, improving the stability of the insertion of the positioning block into the positioning groove and simultaneously fixing the position of the positioning block within the positioning groove. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a sectional view showing the overall structure of the present invention. Figure 4 This is a cross-sectional view of the nut body structure of the present invention; Figure 5 This is a cross-sectional view of the inverter body structure of the present invention; Figure 6 This is a partial sectional view of the structure of the present invention. Figure 7 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 8 For the present invention Figure 3 Enlarged diagram of point B in the middle.

[0022] In the picture: 1. Lead screw body; 2. Nut body; 3. Steel ball; 4. Reversing device body; 5. Guide assembly; 6. Positioning assembly; 7. Pressing assembly; 8. Sliding assembly; 201. Groove; 401. Return ball groove; 501. Guide groove; 502. Guide block; 601. Empty groove; 602. Moving plate; 603. Transmission block; 604. Receiving groove; 605. Rotating plate; 606. Positioning groove; 607. Positioning block; 701. Movable groove; 702. Movable block; 703. Connecting groove; 704. Connecting block; 705. Spring; 706. Limiting groove; 707. Limiting block; 7061. Sliding part; 7062. Rotating part; 7063. Limiting part; 801. Sliding groove; 802. Sliding block. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1 to 8 As shown, the present invention provides an internal circulation ball screw assembly structure, including a screw body 1, a nut body 2, a steel ball 3, a reverser body 4, a guide assembly 5, and a positioning assembly 6; the nut body 2 is connected to the screw body 1 via the steel ball 3; a groove 201 is formed inside the nut body 2; the reverser body 4 is slidably disposed in the groove 201 via the guide assembly 5, and the back of the reverser body 4 is in contact with the bottom of the groove 201, and the two sides of the reverser body 4 are in clearance fit with the sides of the groove 201 via the positioning assembly 6; the reverser body 4 is close to The lead screw body 1 has six ball return grooves 401 arranged in a linear array on one side, and the ball return grooves 401 have an S-shaped structure. The design of the inner circulation ball return groove 401 is essentially the rational design and calculation of the ball return curve (the geometric center line of the ball return groove 401). Finally, the spatial coordinates x, y, z of the curve in the coordinate system connected with the lead screw pair, as well as other relevant dimensions and parameters of the reverser body 4, are given. Then, the reverser body 4 is manufactured, and a ball return groove 401 is machined on the body according to the above coordinates using a forming milling cutter.

[0025] This invention comprises a lead screw body 1, a nut body 2, steel balls 3, and a reversing device body 4. By rotating the lead screw body 1, the steel balls 3 transmit force and motion to the nut body 2, causing it to move. The steel balls 3, aided by a return groove 401 on the reversing device body 4, are forced to roll over the tooth crests of the raceway on the lead screw body 1 and return to their initial thread raceway due to the S-shaped shape of the return groove 401 on its spatial curved surface. This constitutes a single-turn circulating ball chain. Compared to existing technologies, this invention designs a single-turn internal circulation unidirectional aligned type reversing device with a ball chain... The lead screw assembly eliminates multiple sets of flat, round reversing devices. Instead, the ball return groove 401 is integrated and arranged on the reversing device body 4. With the help of the ball return groove 401 on the reversing device body 4, the steel ball 3 is forced to roll along the raceway once, then roll over the thread crest of the raceway of the lead screw body 1 and return to the initial raceway, forming a ball connection with one cycle. This design simplifies assembly, eliminates the need for repeated assembly of the reversing device body 4, and allows for a more compact arrangement of the steel balls 3, saving space and increasing load-bearing capacity. The steel balls 3 experience less impact and vibration within the lead screw body 1, resulting in smoother movement and resolving abnormal noise and jamming issues during the transmission process of the lead screw body 1.

[0026] As a preferred embodiment, the guide assembly 5 includes a guide groove 501 and a guide block 502; the guide groove 501 is provided in the groove 201; the guide block 502 is slidably inserted in the guide groove 501 and welded and fixed to the reverser body 4; the guide block 502 has an isosceles trapezoidal structure, and the size of the guide block 502 on the side closer to the reverser body 4 is smaller than the size of the guide block 502 on the side farther away from the reverser body 4.

[0027] The present invention provides a guide component 5, which inserts a guide block 502 into the guide block 502 and slides the guide block 502 within the guide block 502, thereby allowing the reverser body 4 to slide within the groove 201 until the end face of the guide block 502 contacts the inner sidewall of the guide block 502. This facilitates the guidance of the sliding of the reverser body 4. Since the guide block 502 has an isosceles trapezoidal structure, it facilitates the lateral restriction of the reverser body 4 within the groove 201.

[0028] In a preferred embodiment, the positioning component 6 includes a slot 601, a movable plate 602, a transmission block 603, a receiving slot 604, a rotating plate 605, a positioning slot 606, and a positioning block 607; the reverser body 4 has a slot 601; the movable plate 602 is movably disposed in the slot 601 and connected to the reverser body 4 via the pressing component 7; four transmission blocks 603 are arranged in a linear array symmetrically on both sides of the inner wall of the slot 601; four receiving slots 604 are arranged in a linear array symmetrically on both sides of the reverser body 4, and the ends of the transmission blocks 603 extend into the receiving slots 604; four rotating plates 605 are arranged in a linear array via a rotating shaft. The rotating plate 605 is centrally symmetrically arranged on both sides of the inner wall of the slot 601, and is connected to the moving plate 602 and the transmission block 603 through the sliding component 8; four positioning slots 606 are centrally symmetrically arranged in a linear array on both sides of the inner wall of the groove 201, and the opening of the positioning slot 606 is chamfered; the positioning block 607 slides through the receiving slot 604 and is welded and fixed to the end of the transmission block 603, and the positioning block 607 is inserted into the positioning slot 606; the rotating plate 605 has an L-shaped structure, and the size of the side of the rotating plate 605 closer to the moving plate 602 is smaller than the size of the side of the rotating plate 605 away from the moving plate 602, so as to facilitate the conversion of lateral movement into longitudinal movement; The sliding assembly 8 includes a sliding groove 801 and a sliding block 802; two sliding grooves 801 are provided on the rotating plate 605; the sliding block 802 is slidably inserted into the sliding groove 801, and the two sliding blocks 802 are welded and fixed to the moving plate 602 and the transmission block 603 respectively; the sliding block 802 has a T-shaped structure, the size of the side of the sliding block 802 closer to the moving plate 602 is smaller than the size of the side of the sliding block 802 away from the moving plate 602, and the T-shaped side of the sliding block 802 contacts the side of the rotating plate 605, which can not only avoid the rotating plate 605 from contacting the inner wall of the empty groove 601 and increasing the friction, but also restrict the position of the rotating plate 605.

[0029] This invention, by setting a positioning component 6 and a sliding component 8, moves the moving plate 602 through the pressing component 7. Since the rotating plate 605 has an L-shaped structure, the sliding block 802 on the moving plate 602 slides in the sliding groove 801 on the rotating plate 605, causing the rotating plate 605 to rotate in the empty groove 601 via the rotating shaft. This causes the sliding block 802 on the transmission block 603 to slide in another sliding groove 801 on the rotating plate 605, causing the transmission block 603 to move. This causes the positioning block 607 to slide in the receiving groove 604 and pass through the receiving groove 604 to insert into the positioning groove 606, thus fixing the position of the reverser body 4 in the groove 201, thereby improving the stability of the position of the reverser body 4.

[0030] In a preferred embodiment, the extrusion assembly 7 includes a movable groove 701, a movable block 702, a connecting groove 703, a connecting block 704, a spring 705, a limiting groove 706, and a limiting block 707; the movable groove 701 is provided on one side of the reverser body 4; the movable block 702 slides through the movable groove 701, and the end of the moving plate 602 extends through the empty groove 601 into the movable groove 701; the connecting groove 703 is provided on the side of the movable block 702 near the moving plate 602; the connecting block 704 rotatably passes through the connecting groove 703 and is welded and fixed to the moving plate 602; the spring 705 is sleeved on the moving plate 602, and one end of the spring 705 is welded and fixed to the inner wall of the movable groove 701, and the other end contacts the movable block 702; three limiting grooves 706 are provided in a circular array in the movable groove 701; the limiting block 707 slides through the movable plate 602. The locating block 704 is installed in the limiting groove 706 and welded to the movable block 702; the connecting block 704 has a frustum-shaped structure, and the dimension of the connecting block 704 near the movable plate 602 is smaller than the dimension of the connecting block 704 away from the movable plate 602, so as to facilitate the connection between the movable block 702 and the movable plate 602; the limiting groove 706 includes a sliding part 7061, a rotating part 7062 and a limiting part 7063; the length of the limiting part 7063 is smaller than the length of the sliding part 7061; when the limiting block 707 slides to the intersection of the sliding part 7061 and the rotating part 7062, the sliding block 802 does not contact the inner wall of the sliding groove 801, and the end of the movable plate 602 does not contact the inner wall of the empty groove 601; when the sliding block 802 contacts the inner wall of the sliding groove 801, the locating block 607 is in the receiving groove 604.

[0031] This invention utilizes a pressing component 7. By pressing the movable block 702, the movable block 702 slides within the movable groove 701, causing the limiting block 707 to slide within the sliding portion 7061. This causes the spring 705 to contract under pressure, moving the moving plate 602 until the limiting block 707 slides to the intersection of the sliding portion 7061 and the rotating portion 7062. At this point, rotating the movable block 702 causes it to rotate within the movable groove 701, allowing the limiting block 707 to slide within the rotating portion 7062, and causing the connecting block 704 to rotate within the connecting groove 703. Because the end of the spring 705 contacts the movable block 702, the spring 705 will not twist due to the rotation of the movable block 702. The movable block 702 is released until it slides to the intersection of the rotating part 7062 and the limiting part 7063. At this point, the movable block 702 is released, and under the elastic force of the spring 705, the movable block 702 will slide in the opposite direction in the movable groove 701, causing the limiting block 707 to slide in the limiting part 7063, and causing the movable plate 602 to move in the opposite direction until the side of the limiting block 707 contacts the inner wall of the limiting part 7063. The force generated by the contraction of the spring 705 will make the position of the limiting block 707 in the limiting part 7063 more stable, so as to improve the stability of the insertion of the positioning block 607 and the positioning groove 606, and at the same time, fix the position of the positioning block 607 in the positioning groove 606.

[0032] The working principle of this invention is as follows: When assembling the inverter body 4, the guide block 502 is inserted into the guide block 502 and slid within it, causing the inverter body 4 to slide within the groove 201 until the end face of the guide block 502 contacts the inner wall of the guide block 502. At this point, the movable block 702 is pressed, causing it to slide within the movable groove 701, and the limiting block 707 to slide within the sliding part 7061. This causes the spring 705 to contract under force, moving the moving plate 602 and causing the sliding block on the moving plate 602 to move. 802 slides within the sliding groove 801 on the rotating plate 605, causing the rotating plate 605 to rotate within the empty groove 601 via the rotating shaft. This causes the sliding block 802 on the transmission block 603 to slide within another sliding groove 801 on the rotating plate 605, moving the transmission block 603. This causes the positioning block 607 to slide within the receiving groove 604 and pass through the receiving groove 604 to engage with the positioning groove 606, until the limiting block 707 slides to the intersection of the sliding part 7061 and the rotating part 7062. At this point, the movable block 702 is rotated, causing the movable block 702 to move within the movable groove. Rotation occurs within 701, causing the limiting block 707 to slide within the rotating part 7062, and the connecting block 704 to rotate within the connecting groove 703. Because the end of the spring 705 contacts the movable block 702, the spring 705 will not twist due to the rotation of the movable block 702, until the limiting block 707 slides to the intersection of the rotating part 7062 and the limiting part 7063. At this point, the movable block 702 is released, and under the elastic force of the spring 705, the movable block 702 will slide in the opposite direction within the movable groove 701, causing the limiting block 707 to rotate within the limiting part 7063. Slide the movable plate 602 in reverse, causing the positioning block 607 to slide in reverse within the receiving groove 604 and the positioning groove 606 until the side of the limiting block 707 contacts the inner wall of the limiting part 7063. Since the length of the limiting part 7063 is smaller than the length of the sliding part 7061, the end of the positioning block 607 will still be in the positioning groove 606, thus fixing the position of the reverser body 4 in the groove 201. This completes the assembly of the reverser body 4. When disassembly is required, press the movable block 702 and reverse the above steps.

[0033] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A structure for an internal circulation ball screw pair, characterized in that, The device includes a lead screw body (1), a nut body (2), a steel ball (3), a reverser body (4), a guide assembly (5), and a positioning assembly (6); the nut body (2) is connected to the lead screw body (1) through the steel ball (3); a groove (201) is provided in the nut body (2); the reverser body (4) is slidably disposed in the groove (201) through the guide assembly (5), and the back of the reverser body (4) is in contact with the bottom of the groove (201), and the two sides of the reverser body (4) are in clearance fit with the sides of the groove (201) through the positioning assembly (6); the reverser body (4) has a number of ball return grooves (401) arranged in a linear array on the side near the lead screw body (1), and the ball return grooves (401) have an S-shaped structure.

2. The internal circulation ball screw pair structure according to claim 1, characterized in that, The guide assembly (5) includes a guide groove (501) and a guide block (502); the guide groove (501) is provided in the groove (201); the guide block (502) slides through the guide groove (501) and is fixedly connected to the reverser body (4).

3. The internal circulation ball screw pair structure according to claim 2, characterized in that, The guide block (502) has an isosceles trapezoidal structure, and the size of the guide block (502) on the side closer to the inverter body (4) is smaller than the size of the guide block (502) on the side farther away from the inverter body (4).

4. The internal circulation ball screw pair structure according to claim 3, characterized in that, The positioning component (6) includes a slot (601), a moving plate (602), a transmission block (603), a receiving slot (604), a rotating plate (605), a positioning slot (606), and a positioning block (607); the reverser body (4) has a slot (601) inside; the moving plate (602) is movably disposed in the slot (601) and connected to the reverser body (4) through a pressing component (7); a plurality of transmission blocks (603) are arranged in a linear array symmetrically on both sides of the inner wall of the slot (601); a plurality of receiving slots (604) are arranged in a linear array symmetrically on both sides of the reverser body (4). The transmission block (603) extends into the receiving groove (604) at its end; a plurality of rotating plates (605) are arranged in a linear array symmetrically on both sides of the inner wall of the empty groove (601) through the center of the rotating shaft, and the rotating plates (605) are connected to the moving plate (602) and the transmission block (603) through the sliding assembly (8); a plurality of positioning grooves (606) are arranged in a linear array symmetrically on both sides of the inner wall of the groove (201); the positioning block (607) slides through the receiving groove (604) and is fixedly connected to the end of the transmission block (603), and the positioning block (607) is inserted into the positioning groove (606).

5. The internal circulation ball screw pair structure according to claim 4, characterized in that, The rotating plate (605) has an L-shaped structure, and the size of the rotating plate (605) on the side closer to the moving plate (602) is smaller than the size of the rotating plate (605) on the side farther away from the moving plate (602).

6. The internal circulation ball screw pair structure according to claim 5, characterized in that, The sliding assembly (8) includes a sliding groove (801) and a sliding block (802); two sliding grooves (801) are provided on the rotating plate (605); the sliding block (802) slides through the sliding groove (801), and the two sliding blocks (802) are fixedly connected to the moving plate (602) and the transmission block (603) respectively.

7. The internal circulation ball screw pair structure according to claim 6, characterized in that, The sliding block (802) has a T-shaped structure. The size of the side of the sliding block (802) closer to the moving plate (602) is smaller than the size of the side of the sliding block (802) away from the moving plate (602), and the T-shaped side of the sliding block (802) is in contact with the side of the rotating plate (605).

8. The internal circulation ball screw pair structure according to claim 4, characterized in that, The extrusion assembly (7) includes a movable groove (701), a movable block (702), a connecting groove (703), a connecting block (704), a spring (705), a limiting groove (706), and a limiting block (707); the movable groove (701) is provided on one side of the reverser body (4); the movable block (702) slides through the movable groove (701), and the end of the moving plate (602) extends through the empty groove (601) into the movable groove (701); the movable block (702) has a [missing information] on the side near the moving plate (602). The connecting groove (703) is rotatably inserted into the connecting groove (703) and fixedly connected to the moving plate (602); the spring (705) is sleeved on the moving plate (602), and one end of the spring (705) is fixedly connected to the inner wall of the movable groove (701), and the other end is in contact with the movable block (702); a plurality of limiting grooves (706) are arranged in a ring array in the movable groove (701); the limiting block (707) is slidably inserted into the limiting groove (706) and fixedly connected to the movable block (702).

9. The internal circulation ball screw pair structure according to claim 8, characterized in that, The connecting block (704) has a frustum-shaped structure, and the size of the connecting block (704) on the side closer to the moving plate (602) is smaller than the size of the connecting block (704) on the side farther away from the moving plate (602).

10. The internal circulation ball screw pair structure according to claim 8, characterized in that, The limiting groove (706) includes a sliding part (7061), a rotating part (7062) and a limiting part (7063); the length of the limiting part (7063) is smaller than the length of the sliding part (7061).

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