Sliding pallet fork structure driven by ball screw

Abstract

The invention discloses a sliding pallet fork structure driven by a ball screw, and relates to the technical field of pallet fork structures, the sliding pallet fork structure comprises a fixed plate, a translation mechanism is fixedly mounted on the upper surface of the fixed plate, a third-layer fork plate is slidably connected to the upper surface of the fixed plate, and a second-layer fork plate is slidably connected to the upper surface of the third-layer fork plate; the upper surface of the second-layer fork plate is slidably connected with a first-layer fork plate, and the output end of the translation mechanism is fixedly connected with the outer wall of the third-layer fork plate; and one side of the third layer of fork plate is fixedly provided with a synchronous belt wheel assembly I. According to the invention, the synchronous belt wheel assembly I and the synchronous belt wheel assembly II are additionally arranged among different fork plates, and the translation mechanism is matched with the synchronous belt wheel assembly I and the synchronous belt wheel assembly II to work, so that multiple tail end movement strokes are obtained by using a small driving stroke; therefore, a large-stroke sideslip mechanism is arranged in a limited initial space.

Description

Technical Field

[0001] The invention relates to the technical field of fork structures, and in particular to a sliding fork structure driven by a ball screw. Background Art

[0002] The fork structure is an industrial transport equipment, which is widely used in loading and unloading, stacking and short-distance transportation of goods. At the same time, the fork structure is also commonly used in OHT systems.

[0003] In semiconductor factories, wafer boxes need to be transported and transferred through OHT. The track of the OHT system will pass through different equipment, so the width of the vehicle body is limited. At the same time, the OHT system needs to pick up and place goods on different equipment on both sides, so a fork structure is needed. The fork needs to be extended to the left and right. The extension distance of the fork exceeds the width of the vehicle body, which is difficult to achieve with an ordinary side sliding fork structure. For this reason, we propose a sliding fork structure driven by a ball screw. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a sliding fork structure driven by a ball screw.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A sliding fork structure driven by a ball screw, comprising a fixed plate, a translation mechanism fixedly mounted on the upper surface of the fixed plate, a third layer of fork plate slidably connected to the upper surface of the fixed plate, a second layer of fork plate slidably connected to the upper surface of the third layer of fork plate, a first layer of fork plate slidably connected to the upper surface of the second layer of fork plate, and an output end of the translation mechanism fixedly connected to the outer wall of the third layer of fork plate; A synchronous pulley assembly 1 is fixedly installed on one side of the third layer fork plate, and the synchronous pulley assembly 1 includes a first synchronous wheel, a second synchronous wheel and a first synchronous belt, the first synchronous wheel and the second synchronous wheel are both rotatably connected to the outer wall of the third layer fork plate, the first synchronous wheel and the second synchronous wheel are respectively located at two ends of the third layer fork plate, the first synchronous wheel and the second synchronous wheel are connected through the first synchronous belt transmission, the lower side of the first synchronous belt is fixedly connected to the outer wall of the fixed plate, and the upper side of the first synchronous belt is fixedly connected to the outer wall of the second layer fork plate; A synchronous pulley assembly 2 is fixedly installed on one side of the second layer of fork plate, and the synchronous pulley assembly 2 is located on the other side of the third layer of fork plate. The synchronous pulley assembly 2 includes a third synchronous wheel, a fourth synchronous wheel and a second synchronous belt. The third synchronous wheel and the fourth synchronous wheel are both rotatably connected to the outer wall of the second layer of fork plate. The third synchronous wheel and the fourth synchronous wheel are respectively located at two ends of the second layer of fork plate. The third synchronous wheel and the fourth synchronous wheel are connected through the second synchronous belt transmission. The lower side of the second synchronous belt is fixedly connected to the outer wall of the third layer of fork plate, and the upper side of the second synchronous belt is fixedly connected to the outer wall of the first layer of fork plate.

[0006] Preferably, the translation mechanism includes a motor, the output end of the motor is fixedly connected to an output shaft, the outer wall of the fixed plate is fixedly mounted with a mounting seat, the outer wall of the mounting seat is rotatably connected to a lead screw, the output shaft and the lead screw are connected via a synchronous toothed belt transmission, and the outer wall of the lead screw is threadedly connected to a drive nut.

[0007] Preferably, a first connecting component is fixedly connected to the lower side of the second synchronous belt, and the first connecting component is fixedly connected to the outer wall of the third layer of fork plate; a second connecting component is fixedly connected to the upper side of the second synchronous belt, and the second connecting component is fixedly connected to the outer wall of the first layer of fork plate.

[0008] Preferably, the first connecting component includes an upper connecting plate, which is fixedly connected to the outer wall of the third layer fork plate, and the lower surface of the upper connecting plate is fixedly connected to the lower connecting plate, the second synchronous belt is located between the upper connecting plate and the lower connecting plate, and the second connecting component has the same structure as the first connecting component.

[0009] Preferably, a third connecting component is fixedly connected to the lower side of the first synchronous belt, and the third connecting component is fixedly connected to the outer wall of the fixed plate. A fourth connecting component is fixedly connected to the upper side of the first synchronous belt, and the fourth connecting component is fixedly connected to the outer wall of the third layer fork plate. The third connecting component and the fourth connecting component have the same structure as the first connecting component.

[0010] Preferably, the outer wall of the driving nut is fixedly connected to a connecting piece by screws, and the other end of the connecting piece is fixedly connected to the upper connecting plate by screws.

[0011] Preferably, a first sliding block is fixedly mounted on the upper surface of the fixed plate, a first sliding rail is fixedly mounted on the lower surface of the third-layer fork plate, and the first sliding rail is slidably connected to the first sliding block.

[0012] Preferably, a second slide rail is fixedly mounted on the upper surface of the third layer fork plate, a second slider is fixedly mounted on the lower surface of the second layer fork plate, and the second slide rail is slidably connected to the second slider.

[0013] Preferably, a third slide rail is fixedly connected to the upper surface of the second layer fork plate, a fourth slide block is fixedly installed on the lower surface of the first layer fork plate, and the third slide rail is slidably connected to the fourth slide block.

[0014] The beneficial effects of the present invention are: In the present invention, by combining the third layer fork plate, the second layer fork plate and the first layer fork plate, a multi-layer superposition and a concave-convex alternating spatial layout is adopted to realize miniaturization of the dimensions in the width and height directions of the vehicle body, and a synchronous pulley assembly 1 and a synchronous pulley assembly 2 are added between different fork plates. The translation mechanism does not directly drive the first layer fork plate, but drives the middle third layer fork plate. The translation mechanism cooperates with the synchronous pulley assembly 1 and the synchronous pulley assembly 2 to achieve a small driving stroke and obtain multiple terminal motion strokes, thereby realizing the arrangement of a large-stroke side sliding mechanism within a limited initial space. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic structural diagram of a sliding fork structure driven by a ball screw.

[0016] Figure 2 The figure is a top view of a sliding fork structure driven by a ball screw according to the present invention.

[0017] Figure 3 The present invention is a schematic structural diagram of a synchronous pulley assembly 1 of a sliding fork structure driven by a ball screw.

[0018] Figure 4 The present invention is a schematic structural diagram of a synchronous pulley assembly 2 of a sliding fork structure driven by a ball screw.

[0019] Figure 5 A sliding fork structure driven by a ball screw of the present invention Figure 1 A partial enlarged view of point A in the middle.

[0020] Figure 6 It is a structural schematic diagram of a third connecting component and a fourth connecting component of a sliding fork structure driven by a ball screw of the present invention.

[0021] Figure 7 It is a structural schematic diagram of a first connecting component and a second connecting component of a sliding fork structure driven by a ball screw of the present invention.

[0022] Figure 8 The present invention is a front view of a sliding fork structure driven by a ball screw.

[0023] Numbers in the figure: 1, fixed plate; 2, translation mechanism; 201, motor; 202, output shaft; 203, mounting seat; 204, lead screw; 205, driving nut; 3. The third layer of fork plate; 4. The second layer of fork plate; 5. The first layer of fork plate; 6. Synchronous pulley assembly 1; 601. First synchronous pulley; 602. Second synchronous pulley; 603. First synchronous belt; 7. Synchronous pulley assembly 2; 701. Third synchronous pulley; 702. Fourth synchronous pulley; 703. Second synchronous belt; 8. Connecting piece; 9. First connecting assembly; 901. Upper connecting plate; 902. Lower connecting plate; 10. Second connecting assembly; 11. Third connecting assembly; 12. Fourth connecting assembly; 13. First sliding block; 14. First sliding rail; 15. Second sliding rail; 16. Second sliding block; 17. Third sliding rail; 18. Fourth sliding block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] As attached Figure 1 To Attachment Figure 8 As shown: A sliding fork structure driven by a ball screw, comprising a fixed plate 1, a translation mechanism 2 is fixedly installed on the upper surface of the fixed plate 1, a third layer fork plate 3 is slidably connected to the upper surface of the fixed plate 1, a second layer fork plate 4 is slidably connected to the upper surface of the third layer fork plate 3, a first layer fork plate 5 is slidably connected to the upper surface of the second layer fork plate 4, and an output end of the translation mechanism 2 is fixedly connected to the outer wall of the third layer fork plate 3; A synchronous pulley assembly 6 is fixedly installed on one side of the third layer fork plate 3, and the synchronous pulley assembly 6 includes a first synchronous wheel 601, a second synchronous wheel 602 and a first synchronous belt 603. The first synchronous wheel 601 and the second synchronous wheel 602 are both rotatably connected to the outer wall of the third layer fork plate 3. The first synchronous wheel 601 and the second synchronous wheel 602 are respectively located at two ends of the third layer fork plate 3. The first synchronous wheel 601 and the second synchronous wheel 602 are connected through the first synchronous belt 603. The lower side of the first synchronous belt 603 is fixedly connected to the outer wall of the fixed plate 1, and the upper side of the first synchronous belt 603 is fixedly connected to the outer wall of the second layer fork plate 4. A synchronous pulley assembly 27 is fixedly installed on one side of the second layer fork plate 4, and the synchronous pulley assembly 27 is located on the other side of the third layer fork plate 3. The synchronous pulley assembly 27 includes a third synchronous wheel 701, a fourth synchronous wheel 702 and a second synchronous belt 703. The third synchronous wheel 701 and the fourth synchronous wheel 702 are both rotatably connected to the outer wall of the second layer fork plate 4. The third synchronous wheel 701 and the fourth synchronous wheel 702 are respectively located at both ends of the second layer fork plate 4. The third synchronous wheel 701 and the fourth synchronous wheel 702 are connected through transmission by the second synchronous belt 703. The lower side of the second synchronous belt 703 is fixedly connected to the outer wall of the third layer fork plate 3, and the upper side of the second synchronous belt 703 is fixedly connected to the outer wall of the first layer fork plate 5.

[0026] In the above technical solution, the translation mechanism 2 drives the third layer fork plate 3 to move to one side, and at the same time, the third layer fork plate 3 drives the synchronous belt wheel assembly 6 to move synchronously. Since the lower side of the first synchronous belt 603 is fixedly connected to the outer wall of the fixed plate 1, the first synchronous belt 603 drives the first synchronous wheel 601 and the second synchronous wheel 602 to rotate. Since the upper side of the first synchronous belt 603 is fixedly connected to the outer wall of the second layer fork plate 4, the first synchronous belt 603 drives the second layer fork plate 4 to move to one side. At this time, the second layer fork plate 4 will move with twice the stroke in the same direction relative to the third layer fork plate 3. At the same time, the second layer fork plate 4 drives the synchronous belt pulley assembly 2 7 to move synchronously. Since the lower side of the second synchronous belt 703 is fixedly connected to the outer wall of the third layer fork plate 3, the second synchronous belt 703 drives the third synchronous wheel 701 and the fourth synchronous wheel 702 to rotate. Since the upper side of the second synchronous belt 703 is fixedly connected to the outer wall of the first layer fork plate 5, the second synchronous belt 703 drives the first layer fork plate 5 to move to one side. At this time, the first layer fork plate 5 will move in the same direction with three times the stroke relative to the third layer fork plate 3, that is, through the linkage mechanism of the synchronous belt pulley assembly 1 6 and the synchronous belt pulley assembly 2 7 as above, the end stroke is three times the driving stroke.

[0027] As attached Figure 2 As shown, the translation mechanism 2 includes a motor 201, the output end of the motor 201 is fixedly connected to an output shaft 202, the outer wall of the fixed plate 1 is fixedly installed with a mounting seat 203, the outer wall of the mounting seat 203 is rotatably connected to a lead screw 204, the output shaft 202 and the lead screw 204 are connected by a synchronous toothed belt transmission, and the outer wall of the lead screw 204 is threadedly connected to a drive nut 205.

[0028] In the above technical solution, the motor 201 is started, the motor 201 drives the output shaft 202 to rotate, the output shaft 202 drives the lead screw 204 to rotate through the synchronous toothed belt, and the lead screw 204 drives the driving nut 205 to move horizontally to one side.

[0029] As attached Figure 5 To Attachment Figure 8As shown, the lower side of the second synchronous belt 703 is fixedly connected with the first connecting component 9, and the first connecting component 9 is fixedly connected to the outer wall of the third layer fork plate 3, the upper side of the second synchronous belt 703 is fixedly connected with the second connecting component 10, and the second connecting component 10 is fixedly connected to the outer wall of the first layer fork plate 5, the first connecting component 9 includes an upper connecting plate 901, the upper connecting plate 901 is fixedly connected to the outer wall of the third layer fork plate 3, the lower surface of the upper connecting plate 901 is fixedly connected with the lower connecting plate 902, the second synchronous belt 703 is located between the upper connecting plate 901 and the lower connecting plate 902, the second connecting component 10 has the same structure as the first connecting component 9, the lower side of the first synchronous belt 603 is fixedly connected with the third connecting component 11, and the third connecting component 11 is fixedly connected to the outer wall of the fixed plate 1, the upper side of the first synchronous belt 603 is fixedly connected with the fourth connecting component 12, and the fourth connecting component 12 is fixedly connected to the outer wall of the third layer fork plate 3, and the third connecting component 11 and the fourth connecting component 12 have the same structure as the first connecting component 9.

[0030] In the above technical solution, through the design of the upper connecting plate 901 and the lower connecting plate 902, the upper connecting plate 901 and the lower connecting plate 902 are fixedly connected by screws, the second synchronous belt 703 is located between the upper connecting plate 901 and the lower connecting plate 902, and the outer wall of the lower connecting plate 902 is provided with a groove matching the teeth of the second synchronous belt 703, and the groove of the lower connecting plate 902 is engaged with the teeth of the second synchronous belt 703, and a fixed connection with the second synchronous belt 703 is achieved through the upper connecting plate 901 and the lower connecting plate 902, and there is no need to open a hole in the second synchronous belt 703.

[0031] As attached Figure 5 As shown, the outer wall of the driving nut 205 is fixedly connected to a connecting member 8 by screws, and the other end of the connecting member 8 is fixedly connected to the upper connecting plate 901 by screws.

[0032] In the above technical solution, the connecting member 8 is fixedly connected to the upper connecting plate 901 , which can reduce the number of holes opened on the outer wall of the third layer fork plate 3 .

[0033] As attached Figure 8 As shown, a first slider 13 is fixedly installed on the upper surface of the fixed plate 1, a first slide rail 14 is fixedly installed on the lower surface of the third layer fork plate 3, the first slide rail 14 is slidably connected to the first slider 13, a second slide rail 15 is fixedly installed on the upper surface of the third layer fork plate 3, a second slider 16 is fixedly installed on the lower surface of the second layer fork plate 4, the second slide rail 15 is slidably connected to the second slider 16, a third slide rail 17 is fixedly connected to the upper surface of the second layer fork plate 4, a fourth slider 18 is fixedly installed on the lower surface of the first layer fork plate 5, the third slide rail 17 is slidably connected to the fourth slider 18.

[0034] The specific usage and function of this embodiment are as follows: When the present invention is used, the motor 201 is started, the motor 201 drives the output shaft 202 to rotate, the output shaft 202 drives the lead screw 204 to rotate through the synchronous toothed belt, the lead screw 204 drives the driving nut 205 to move horizontally to one side, the driving nut 205 drives the first connecting component 9 to move to one side through the connecting member 8, and the first connecting component 9 drives the third layer fork plate 3 to move to one side; At the same time, the third layer fork plate 3 drives the synchronous belt wheel assembly 6 to move synchronously. Since the lower side of the first synchronous belt 603 is fixedly connected to the outer wall of the fixed plate 1, the first synchronous belt 603 drives the first synchronous wheel 601 and the second synchronous wheel 602 to rotate. Since the upper side of the first synchronous belt 603 is fixedly connected to the outer wall of the second layer fork plate 4, the first synchronous belt 603 drives the second layer fork plate 4 to move to one side. At this time, the second layer fork plate 4 will move with twice the stroke in the same direction relative to the third layer fork plate 3. At the same time, the second layer fork plate 4 drives the synchronous belt pulley assembly 2 7 to move synchronously. Since the lower side of the second synchronous belt 703 is fixedly connected to the outer wall of the third layer fork plate 3, the second synchronous belt 703 drives the third synchronous wheel 701 and the fourth synchronous wheel 702 to rotate. Since the upper side of the second synchronous belt 703 is fixedly connected to the outer wall of the first layer fork plate 5, the second synchronous belt 703 drives the first layer fork plate 5 to move to one side. At this time, the first layer fork plate 5 will move in the same direction with three times the stroke relative to the third layer fork plate 3, that is, through the linkage mechanism of the synchronous belt pulley assembly 1 6 and the synchronous belt pulley assembly 2 7 as above, the end stroke is three times the driving stroke.

[0035] For the above structure and process, please refer to Figure 1-8 .

[0036] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sliding fork structure driven by a ball screw, comprising a fixed plate (1), characterized in that: The upper surface of the fixed plate (1) is fixedly mounted with a translation mechanism (2); the upper surface of the fixed plate (1) is slidably connected to a third layer of fork plates (3); the upper surface of the third layer of fork plates (3) is slidably connected to a second layer of fork plates (4); the upper surface of the second layer of fork plates (4) is slidably connected to a first layer of fork plates (5); and the output end of the translation mechanism (2) is fixedly connected to the outer wall of the third layer of fork plates (3); A synchronous pulley assembly (6) is fixedly mounted on one side of the third layer fork plate (3), and the synchronous pulley assembly (6) comprises a first synchronous wheel (601), a second synchronous wheel (602) and a first synchronous belt (603); the first synchronous wheel (601) and the second synchronous wheel (602) are both rotatably connected to the outer wall of the third layer fork plate (3); the first synchronous wheel (601) and the second synchronous wheel (602) are respectively located at two ends of the third layer fork plate (3); the first synchronous wheel (601) and the second synchronous wheel (602) are connected in transmission via the first synchronous belt (603); the lower side of the first synchronous belt (603) is fixedly connected to the outer wall of the fixed plate (1); and the upper side of the first synchronous belt (603) is fixedly connected to the outer wall of the second layer fork plate (4); A second synchronous pulley assembly (7) is fixedly mounted on one side of the second layer fork plate (4). The second synchronous pulley assembly (7) is located on the other side of the third layer fork plate (3). The second synchronous pulley assembly (7) comprises a third synchronous wheel (701), a fourth synchronous wheel (702) and a second synchronous belt (703). The third synchronous wheel (701) and the fourth synchronous wheel (702) are both rotatably connected to the outer wall of the second layer fork plate (4). The third synchronous wheel (701) and the fourth synchronous wheel (702) are respectively located at two ends of the second layer fork plate (4). The third synchronous wheel (701) and the fourth synchronous wheel (702) are connected in transmission via the second synchronous belt (703). The lower side of the second synchronous belt (703) is fixedly connected to the outer wall of the third layer fork plate (3), and the upper side of the second synchronous belt (703) is fixedly connected to the outer wall of the first layer fork plate (5).

2. A sliding fork structure driven by a ball screw according to claim 1, characterized in that: The translation mechanism (2) comprises a motor (201), the output end of the motor (201) is fixedly connected to an output shaft (202), the outer wall of the fixed plate (1) is fixedly mounted with a mounting seat (203), the outer wall of the mounting seat (203) is rotatably connected to a lead screw (204), the output shaft (202) and the lead screw (204) are connected via a synchronous toothed belt transmission, and the outer wall of the lead screw (204) is threadedly connected to a drive nut (205).

3. A sliding fork structure driven by a ball screw according to claim 2, characterized in that: A first connection component (9) is fixedly connected to the lower side of the second synchronous belt (703), and the first connection component (9) is fixedly connected to the outer wall of the third layer fork plate (3). A second connection component (10) is fixedly connected to the upper side of the second synchronous belt (703), and the second connection component (10) is fixedly connected to the outer wall of the first layer fork plate (5).

4. A sliding fork structure driven by a ball screw according to claim 3, characterized in that: The first connection assembly (9) comprises an upper connection plate (901), the upper connection plate (901) being fixedly connected to the outer wall of the third layer fork plate (3), the lower surface of the upper connection plate (901) being fixedly connected to a lower connection plate (902), the second synchronous belt (703) being located between the upper connection plate (901) and the lower connection plate (902), and the second connection assembly (10) having the same structure as the first connection assembly (9).

5. The sliding fork structure driven by a ball screw according to claim 3, characterized in that: A third connecting component (11) is fixedly connected to the lower side of the first synchronous belt (603), and the third connecting component (11) is fixedly connected to the outer wall of the fixed plate (1). A fourth connecting component (12) is fixedly connected to the upper side of the first synchronous belt (603), and the fourth connecting component (12) is fixedly connected to the outer wall of the third layer fork plate (3). The third connecting component (11) and the fourth connecting component (12) have the same structure as the first connecting component (9).

6. A sliding fork structure driven by a ball screw according to claim 4, characterized in that: The outer wall of the driving nut (205) is fixedly connected to a connecting piece (8) via screws, and the other end of the connecting piece (8) is fixedly connected to an upper connecting plate (901) via screws.

7. The sliding fork structure driven by a ball screw according to claim 1, characterized in that: A first sliding block (13) is fixedly mounted on the upper surface of the fixed plate (1), a first sliding rail (14) is fixedly mounted on the lower surface of the third layer fork plate (3), and the first sliding rail (14) is slidably connected to the first sliding block (13).

8. The sliding fork structure driven by a ball screw according to claim 7, characterized in that: A second slide rail (15) is fixedly mounted on the upper surface of the third layer fork plate (3), a second slider (16) is fixedly mounted on the lower surface of the second layer fork plate (4), and the second slide rail (15) is slidably connected to the second slider (16).

9. A sliding fork structure driven by a ball screw according to claim 8, characterized in that: The upper surface of the second layer fork plate (4) is fixedly connected to a third slide rail (17), the lower surface of the first layer fork plate (5) is fixedly mounted with a fourth slide block (18), and the third slide rail (17) is slidably connected to the fourth slide block (18).

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