High-precision ball screw sliding table driving mechanism

Abstract

The utility model belongs to the technical field of transmission devices, and discloses a high-precision ball screw sliding table driving mechanism. Comprising a concave installation base, a sliding base arranged in the concave installation base in a sliding mode, a first ball screw rotationally installed in the concave installation base and in threaded connection with the sliding base, and a driving motor fixed to the concave installation base and driving the first ball screw to rotate. The sliding base is provided with a main carrying block and a first lifting assembly used for driving the main carrying block to ascend and descend in the moving process of the sliding base. According to the device, the driving motor drives the first ball screw to rotate after working, so that the sliding seat in sliding fit with the concave mounting seat moves towards the side away from the driving motor in the length direction of the concave mounting seat, and in the process, the driving motor is closed when the first lifting assembly drives the main carrying block to rise to the specified height; the workpiece can be lifted without other lifting tools or mechanical arms or other parts, operation is easy and convenient, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of transmission device technology, and in particular to a high-precision ball screw slide drive mechanism. Background Technology

[0002] Ball screw slides are used in a variety of scenarios, such as high-precision machine tools and the transportation of items between workstations. When in use, the ball screw on the slide rotates, causing the slide connected to the ball screw to move horizontally. Due to the high-precision connection between the ball screw and the slide, the slide can be accurately transported to the designated position.

[0003] Chinese utility model patent CN215257664U discloses a reverse-drive linear screw module, including a base. Fixed seats are provided on both sides of the base, and the fixed seats are fixedly connected to the base. A slide is provided between the two fixed seats, and the slide is located on the top of the base. A guide rail is provided between the slide and the base, and the guide rail is fixedly connected to the base and slidably connected to the slide. A reverse drive mechanism is provided on one side of the slide, and the reverse drive mechanism includes a fixed screw, which is located at the bottom of the slide, with both ends of the fixed screw fixedly connected to the base.

[0004] Regarding the aforementioned technologies, the inventors believe that the following drawbacks exist: When the aforementioned technologies are used, the cooperation of the servo motor, the active synchronous pulley, the driven synchronous pulley, and the lead screw nut enables the slide table to make reciprocating linear motion along the guide rail. However, when transporting between workstations, there may be a height difference between adjacent workstations. If the workpiece is only transported horizontally by the slide table, it may be necessary to use other lifting tools or robotic arms to lift the workpiece in order to meet the usage requirements of the workpiece, which is quite cumbersome. Utility Model Content

[0005] To address the aforementioned problems, this invention provides a high-precision ball screw slide drive mechanism.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a high-precision ball screw slide drive mechanism, including a concave mounting base, a slide block slidably disposed in the concave mounting base, a first ball screw rotatably mounted in the concave mounting base and threadedly connected to the slide block, and a drive motor fixed on the concave mounting base and driving the first ball screw to rotate. The first ball screw is horizontally disposed, and the slide block is provided with a main load block and a first lifting component for driving the main load block to rise and fall during the movement of the slide block.

[0007] By adopting the above technical solution, after the drive motor works, it drives the first ball screw to rotate, so that the slide block that slides with the concave mounting base moves along the length of the concave mounting base toward the side away from the drive motor. During this process, the first lifting component will drive the main load block to rise until the main load block rises to the specified height and then the drive motor is turned off. Similarly, after the drive motor works, it drives the first ball screw to rotate in the opposite direction, which can drive the main load block to descend. This eliminates the need to use other lifting tools or robotic arms to complete the lifting action of the workpiece. The operation is simple and convenient, and easy to use.

[0008] Furthermore, the top of the slide block is provided with a mounting groove that slides and engages with the main load block. The first lifting assembly includes a protective shell fixed to the side wall of the slide block, a second ball screw rotatably mounted on the protective shell and vertically arranged, a limiting plate fixed to the main load block and threadedly connected to the second ball screw, a first gear fixedly sleeved on the second ball screw, and a first rack disposed on the concave mounting seat. A limiting groove for sliding engagement of the limiting plate is provided through the side wall of the slide block. The first rack is located on the side of the concave mounting seat away from the drive motor and can mesh with the first rack.

[0009] By adopting the above technical solution, during the movement of the slide away from the drive motor, the first gear meshes with the first rack, and the first gear drives the second ball screw to rotate. Since the second ball screw is threadedly connected to the limiting plate, and the limiting plate slides with the limiting groove, the main load block slides upward along the inner wall of the mounting groove until the workpiece on the main load block reaches the required height, thus lifting the workpiece. Similarly, during the movement of the slide away from the drive motor, the first gear gradually separates from the first rack, and the main load block gradually resets during this process.

[0010] Furthermore, the main load block has a cavity, and two limiting grooves are provided and symmetrically distributed on both sides of the slide. The main load block is provided with a secondary load block and a second lifting component for driving the secondary load block to rise and fall during the movement of the main load block. The cross-section of the secondary load block is inverted "T" shape. The two ends of the horizontal part of the secondary load block are respectively slidably engaged with the inner walls on both sides of the cavity. The upper end of the vertical part of the secondary load block penetrates through the top of the main load block and is slidably engaged.

[0011] By adopting the above technical solution, during the process of the main load block rising, the secondary load block can be driven to rise by the second lifting component. Similarly, during the process of the main load block falling, the secondary load block can be driven to fall by the second lifting component. After the falling operation is completed, the secondary load block is located inside the main load block, and the main load block is located inside the slide. This ensures the lifting height while reducing the space occupied.

[0012] Furthermore, the second lifting assembly includes a bidirectional threaded rod rotatably mounted within the main load block. The bidirectional threaded rod has two threads with equal pitch and opposite directions. The second lifting assembly also includes a first movable block movably disposed within the cavity, a second movable block movably disposed within the cavity, a first connecting rod hinged to the top of the first movable block, a second connecting rod hinged to the top of the second movable block, a guide rod fixed within the cavity and parallel to the bidirectional threaded rod, a second gear fixedly sleeved on the bidirectional threaded rod and located within a limiting groove, and a second rack fixed within a limiting groove on the side away from the limiting plate and meshing with the second gear. The bidirectional threaded rod passes through the first movable block and the second movable block and is threadedly connected. The first movable block and the second movable block are symmetrically arranged about the middle of the bidirectional threaded rod. The guide rod passes through the first movable block and the second movable block and is slidably engaged. The upper ends of the first connecting rod and the second connecting rod are both hinged to the bottom of the auxiliary load block.

[0013] By adopting the above technical solution, since the second gear meshes with the second rack, the second rack is fixed to the limiting groove on the slide, and the bidirectional threaded rod is threadedly connected to the first and second moving blocks, during the process of the main load block rising, the second gear drives the bidirectional threaded rod fixed to it to move upward and rotate, so that the first and second moving blocks approach each other under the limit of the guide rod, thereby driving the lower ends of the first and second connecting rods to approach each other. The first and second connecting rods gradually move from the inclined state to a state that is perpendicular to the first ball screw. The first and second connecting rods can lift the auxiliary load block. Similarly, during the process of the main load block falling, the second gear drives the bidirectional threaded rod to move downward and rotate in the opposite direction, and the first and second connecting rods gradually reset and lower the auxiliary load block.

[0014] Furthermore, a limiting rod that is slidably connected to the first rack is fixed between the side plates on both sides of the concave mounting base. A threaded post that is threadedly connected to the first rack is provided through the top of the first rack, and the lower end of the threaded post abuts against the top of the limiting rod.

[0015] By adopting the above technical solution, when the distance between the workstations of two workpieces decreases, the operator needs to rotate the threaded column and separate it from the limiting rod, then slide the first rack along the limiting rod until the first rack is adjusted to the corresponding position, and then tighten the threaded column to fix the first rack. This allows the first gear to mesh with the first rack as early as possible and complete the lifting action of the main load block and the auxiliary load block. Thus, this device is suitable for workstations with different distances, improving its applicability.

[0016] Furthermore, the second ball screw is rotatably installed inside the protective housing, and the limiting plate is slidably connected to the inner wall of the protective housing.

[0017] By adopting the above technical solution, the protective shell plays a protective role when the first gear rotates, preventing unauthorized personnel from accidentally touching it and improving safety.

[0018] Furthermore, the pitch of the thread on the first ball screw, the pitch of the thread on the second ball screw, and the pitch of the thread on the bidirectional threaded rod increase sequentially.

[0019] By adopting the above technical solution, it is ensured that the main load block and the auxiliary load block can rise to the predetermined height when the slide moves, and the small pitch of the thread on the first ball screw can ensure precise control of the movement and stopping of the slide.

[0020] Furthermore, a regular hexagonal groove is provided at the upper end of the threaded column.

[0021] By adopting the above technical solution, the staff can place a suitable hexagonal wrench into the regular hexagonal groove to facilitate the rotation of the threaded column.

[0022] In summary, this utility model has the following beneficial effects: In this application, after the drive motor operates, it drives the first ball screw to rotate, so that the slide block, which is slidably engaged with the concave mounting base, moves along the length direction of the concave mounting base toward the side away from the drive motor. During this process, the first gear meshes with the first rack, and the first gear drives the second ball screw to rotate. Since the second ball screw is threadedly connected to the limiting plate, and the limiting plate is slidably engaged with the limiting groove, the main load block slides upward along the inner wall of the mounting groove. At the same time, since the second gear meshes with the second rack, the second rack is fixed to the limiting groove on the slide block. The bidirectional threaded rod is threadedly connected to the first moving block and the second moving block. During the upward movement of the main load block, the second gear drives the bidirectional threaded rod fixed to it. The mechanism moves upward and rotates, causing the first and second moving blocks to approach each other under the guidance of the guide rod. This drives the lower ends of the first and second connecting rods to approach each other. The first and second connecting rods gradually move from an inclined state to a state perpendicular to the first ball screw. The first and second connecting rods can lift the auxiliary load block until the main load block and auxiliary load block rise to the predetermined position and the motor is turned off. Similarly, after the drive motor works, it drives the first ball screw to rotate in the opposite direction, causing the main load block and auxiliary load block to gradually return to the initial state, realizing the lowering operation of the main load block and auxiliary load block. This eliminates the need to use other lifting tools or robotic arms to lift the workpiece, making the operation simple, convenient, and easy to use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram illustrating the structure of the second lifting component in an embodiment of this utility model;

[0025] Figure 3 This is a plan view of an embodiment of the present invention to highlight the first lifting component;

[0026] Figure 4 This is a schematic diagram of the structure of the main load block and the auxiliary load block after they have been lifted, according to an embodiment of this utility model.

[0027] Figure 5 yes Figure 1 Enlarged diagram of point A in the middle.

[0028] In the diagram: 1. Concave mounting base; 2. Slide; 21. Limiting groove; 3. First ball screw; 4. Drive motor; 5. Main load block; 6. First lifting assembly; 61. Protective shell; 62. Second ball screw; 63. Limiting plate; 64. First gear; 65. First rack; 7. Secondary load block; 8. Second lifting assembly; 81. Bidirectional threaded rod; 82. First moving block; 83. Second moving block; 84. First connecting rod; 85. Second connecting rod; 86. Guide rod; 87. Second gear; 88. Second rack; 9. Limiting rod; 10. Threaded column; 11. Regular hexagonal groove. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] like Figure 1-5 As shown in the figure, this application discloses a high-precision ball screw slide drive mechanism, including a concave mounting base 1, a slide 2, a first lifting assembly 6, and a second lifting assembly 8. The slide 2 is slidably disposed within the concave mounting base 1. A limiting groove 21 is formed through the side wall of the slide 2, and two limiting grooves 21 are provided and symmetrically distributed on both sides of the slide 2. A main load block 5 is disposed on the slide 2, and a mounting groove for sliding engagement with the main load block 5 is formed on the top of the slide 2. A cavity is provided inside the main load block 5, and a secondary load block 7 is disposed on the main load block 5. The cross-section of the secondary load block 7 is inverted "T" shaped. The two ends of the horizontal portion of the secondary load block 7 are slidably engaged with the inner walls on both sides of the cavity, and the upper end of the vertical portion of the secondary load block 7 penetrates through the top of the main load block 5 and is slidably engaged. A first ball screw 3, which is threadedly connected to the slide block 2, is rotatably mounted inside the concave mounting base 1. The first ball screw 3 is horizontally positioned, and a drive motor 4 that drives the first ball screw 3 to rotate is fixed on the concave mounting base 1.

[0031] The first lifting assembly 6 is mounted on the slide block 2 and is used to drive the main load block 5 to rise and fall during the movement of the slide block 2. The first lifting assembly 6 includes a protective shell 61, a second ball screw 62, a limiting plate 63, a first gear 64, and a first rack 65. The protective shell 61 is a shell structure with an opening on one side, and the side wall of the opening side of the protective shell 61 is fixed to the side wall of the slide block 2. The second ball screw 62 is rotatably mounted on the protective shell 61 and is vertically arranged. The limiting plate 63 is fixed to the main load block 5 and threadedly connected to the second ball screw 62. The limiting plate 63 is slidably engaged with the limiting groove 21 near the second ball screw 62. The first gear 64 is fixedly sleeved on the second ball screw 62, and the first rack 65 is disposed on the concave mounting base 1. The first rack 65 is located on the side of the concave mounting base 1 away from the drive motor 4 and can mesh with the drive motor 4.

[0032] The second lifting assembly 8 is mounted on the main load block 5 and is used to drive the auxiliary load block 7 to rise and fall during the movement of the main load block 5. The second lifting assembly 8 includes a bidirectional threaded rod 81, a first moving block 82, a second moving block 83, a first connecting rod 84, a second connecting rod 85, a guide rod 86, a second gear 87, and a second rack 88. The bidirectional threaded rod 81 is rotatably mounted inside the main load block 5 and is perpendicular to the first ball screw 3. The bidirectional threaded rod 81 has two sections of threads with equal pitch and opposite directions. The first moving block 82 and the second moving block 83 are movably mounted in the cavity. The bidirectional threaded rod 81 passes through the first moving block 82 and the second moving block 83 and is threadedly connected to them. The first moving block 82 and the second moving block 83 are symmetrically arranged about the middle of the bidirectional threaded rod 81. The first connecting rod 84 is hinged to the top of the first moving block 82, and the second connecting rod 85 is hinged to the top of the second moving block 83. The upper ends of both the first connecting rod 84 and the second connecting rod 85 are hinged to the bottom of the auxiliary load block 7. The guide rod 86 is fixed in the cavity and parallel to the bidirectional threaded rod 81. The guide rod 86 passes through the first moving block 82 and the second moving block 83 and is slidably engaged. The second gear 87 is fixedly sleeved on the bidirectional threaded rod 81 and located in the limiting groove 21. The second rack 88 is fixed in the limiting groove 21 on the side away from the limiting plate 63 and meshes with the second gear 87. After the drive motor 4 starts working, it drives the first ball screw 3 to rotate, so that the slide block 2, which is slidably engaged with the concave mounting base 1, moves along the length of the concave mounting base 1 toward the side away from the drive motor 4. During this process, the first gear 64 meshes with the first rack 65, and the first gear 64 drives the second ball screw to rotate. Since the second ball screw is threadedly connected to the limiting plate 63, and the limiting plate 63 is slidably engaged with the limiting groove 21, the main load block 5 slides upward along the inner wall of the mounting groove. At the same time, since the second gear 87 meshes with the second rack 88, and the second rack 88 is fixed to the limiting groove 21 on the slide block 2, the bidirectional threaded rod 81 is threadedly connected to the first moving block 82 and the second moving block 83. During the process of the main load block 5 rising, the second gear 87 drives the second ball screw to rotate. The moving and fixed bidirectional threaded rod 81 moves upward and rotates, so that the first moving block 82 and the second moving block 83 approach each other under the limit of the guide rod 86, thereby driving the lower ends of the first connecting rod 84 and the lower ends of the second connecting rod 85 to approach each other. The first connecting rod 84 and the second connecting rod 85 can lift the auxiliary load block 7 until the main load block 5 and the auxiliary load block 7 rise to the predetermined position and the motor is turned off. Similarly, after the drive motor 4 works, it drives the first ball screw 3 to rotate in the opposite direction, so that the main load block 5 and the auxiliary load block 7 gradually return to the initial state, realizing the lowering operation of the main load block 5 and the auxiliary load block 7. This eliminates the need to use other lifting tools or mechanical arms to complete the lifting and lowering of the workpiece. The operation is simple and convenient and easy to use.

[0033] A limiting rod 9, which is slidably connected to the first rack 65, is fixed between the side plates on both sides of the concave mounting base 1. A threaded post 10, which is threadedly connected to the top of the first rack 65, is provided through the top of the first rack 65. The lower end of the threaded post 10 abuts against the top of the limiting rod 9. When the distance between the workstations of two workpieces decreases, the operator needs to rotate the threaded post 10 to separate it from the limiting rod 9, and then slide the first rack 65 along the limiting rod 9 until the first rack 65 is adjusted to the corresponding position. The threaded post 10 is then tightened to fix the first rack 65, so that the first gear 64 can mesh with the first rack 65 as soon as possible and complete the lifting action of the main load block 5 and the auxiliary load block 7. Therefore, this device is suitable for workstations with different distances, thus improving its applicability.

[0034] The second ball screw 62 is rotatably mounted inside the protective housing 61, and the limiting plate 63 is slidably connected to the inner wall of the protective housing 61. When the first gear 64 rotates, the protective housing 61 provides protection, preventing accidental contact by unauthorized personnel and improving safety.

[0035] The pitch of the thread on the first ball screw 3, the pitch of the thread on the second ball screw 62, and the pitch of the thread on the bidirectional threaded rod 81 increase sequentially. This ensures that when the slide 2 moves, the main load block 5 and the auxiliary load block 7 can rise to the predetermined height. The relatively small pitch of the thread on the first ball screw 3 ensures precise control of the movement and stopping of the slide 2.

[0036] The upper end of the threaded post 10 has a regular hexagonal groove 11. The operator inserts a suitable hexagonal wrench into the regular hexagonal groove 11 to facilitate the rotation of the threaded post 10.

[0037] The operating principle of the high-precision ball screw slide drive mechanism in this embodiment is as follows: After the drive motor 4 starts working, it drives the first ball screw 3 to rotate, so that the slide 2, which is slidably engaged with the concave mounting base 1, moves along the length direction of the concave mounting base 1 towards the side away from the drive motor 4. During this process, the first gear 64 meshes with the first rack 65, and the first gear 64 drives the second ball screw to rotate. Since the second ball screw is threadedly connected to the limiting plate 63, and the limiting plate 63 is slidably engaged with the limiting groove 21, the main load block 5 slides upward along the inner wall of the mounting groove. At the same time, since the second gear 87 meshes with the second rack 88, and the second rack 88 is fixed to the limiting groove 21 on the slide 2, the bidirectional threaded rod 81 is threadedly connected to the first moving block 82 and the second moving block 83. During the upward movement of the main load block 5, the second gear 87 drives the fixed part to move upward. The bidirectional threaded rod 81 moves upward and rotates, causing the first moving block 82 and the second moving block 83 to approach each other under the limit of the guide rod 86. This drives the lower ends of the first connecting rod 84 and the second connecting rod 85 to approach each other. The first connecting rod 84 and the second connecting rod 85 gradually move from an inclined state to a state perpendicular to the first ball screw 3. The first connecting rod 84 and the second connecting rod 85 can lift the auxiliary load block 7 until the main load block 5 and the auxiliary load block 7 rise to the predetermined position and the motor is turned off. Similarly, after the drive motor 4 works, it drives the first ball screw 3 to rotate in the opposite direction, so that the main load block 5 and the auxiliary load block 7 gradually return to the initial state, realizing the lowering operation of the main load block 5 and the auxiliary load block 7. This eliminates the need to use other lifting tools or robotic arms to complete the lifting action of the workpiece. The operation is simple and convenient and easy to use.

[0038] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A high-precision ball screw slide drive mechanism, comprising a concave mounting base (1), a slide (2) slidably disposed within the concave mounting base (1), a first ball screw (3) rotatably mounted within the concave mounting base (1) and threadedly connected to the slide (2), and a drive motor (4) fixed to the concave mounting base (1) and driving the first ball screw (3) to rotate, wherein the first ball screw (3) is horizontally disposed, characterized in that: The slide (2) is provided with a main load block (5) and a first lifting component (6) for driving the main load block (5) to rise and fall during the movement of the slide (2).

2. The high-precision ball screw slide drive mechanism according to claim 1, characterized in that: The top of the slide (2) is provided with an installation groove that slides and engages with the main load block (5). The first lifting assembly (6) includes a protective shell (61) fixed to the side wall of the slide (2), a second ball screw (62) rotatably mounted on the protective shell (61) and vertically arranged, a limiting plate (63) fixed to the main load block (5) and threadedly connected to the second ball screw (62), a first gear (64) fixedly sleeved on the second ball screw (62), and a first rack (65) provided on the concave mounting seat (1). The side wall of the slide (2) is provided with a limiting groove (21) for sliding engagement of the limiting plate (63). The first rack (65) is located on the side of the concave mounting seat (1) away from the drive motor (4) and can mesh with the first rack (65).

3. The high-precision ball screw slide drive mechanism according to claim 2, characterized in that: The main load block (5) has a cavity inside. Two limiting grooves (21) are provided and symmetrically distributed on both sides of the slide block (2). The main load block (5) is provided with a secondary load block (7) and a second lifting component (8) for driving the secondary load block (7) to rise and fall during the movement of the main load block (5). The cross-section of the secondary load block (7) is inverted "T" shape. The two ends of the horizontal part of the secondary load block (7) are respectively slidably engaged with the inner walls on both sides of the cavity. The upper end of the vertical part of the secondary load block (7) penetrates the top of the main load block (5) and is slidably engaged.

4. The high-precision ball screw slide drive mechanism according to claim 3, characterized in that: The second lifting assembly (8) includes a bidirectional threaded rod (81) rotatably mounted in the main load block (5). The bidirectional threaded rod (81) is provided with two threads of equal pitch and opposite direction. The second lifting assembly (8) also includes a first movable block (82) movably disposed in the cavity, a second movable block (83) movably disposed in the cavity, a first connecting rod (84) hinged to the top of the first movable block (82), a second connecting rod (85) hinged to the top of the second movable block (83), a guide rod (86) fixed in the cavity and parallel to the bidirectional threaded rod (81), and a guide rod (86) fixedly sleeved on the bidirectional threaded rod (81) and located at the limit. The second gear (87) in the slot (21) and the second rack (88) fixed in the slot (21) away from the limiting plate (63) and meshing with the second gear (87), the bidirectional threaded rod (81) passes through the first moving block (82) and the second moving block (83) and is threadedly connected, the first moving block (82) and the second moving block (83) are symmetrically arranged about the middle of the bidirectional threaded rod (81), the guide rod (86) passes through the first moving block (82) and the second moving block (83) and is slidably engaged, the upper end of the first connecting rod (84) and the upper end of the second connecting rod (85) are both hinged to the bottom of the auxiliary load block (7).

5. The high-precision ball screw slide drive mechanism according to claim 2, characterized in that: A limiting rod (9) that is slidably connected to the first rack (65) is fixed between the side plates on both sides of the concave mounting base (1). A threaded post (10) that is threadedly connected to the first rack (65) is provided through the top of the first rack (65). The lower end of the threaded post (10) abuts against the top of the limiting rod (9).

6. The high-precision ball screw slide drive mechanism according to claim 2, characterized in that: The second ball screw (62) is rotatably installed inside the protective shell (61), and the limiting plate (63) is slidably connected to the inner wall of the protective shell (61).

7. The high-precision ball screw slide drive mechanism according to claim 4, characterized in that: The pitch of the thread on the first ball screw (3), the pitch of the thread on the second ball screw (62), and the pitch of the thread on the bidirectional threaded rod (81) increase sequentially.

8. A high-precision ball screw slide drive mechanism according to claim 5, characterized in that: The upper end of the threaded post (10) is provided with a regular hexagonal groove (11).

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