A high-precision rack that is easy to manufacture

Abstract

The utility model discloses a high accuracy rack convenient to manufacture belongs to high accuracy rack field, comprising the rack main part that is formed by tooth block no.

Description

Technical Field

[0001] This utility model belongs to the field of high-precision rack technology, specifically relating to a high-precision rack that is easy to manufacture. Background Technology

[0002] As a core component of mechanical transmission systems, racks are widely used in CNC machine tools, automated production lines, precision instruments and other fields. Their accuracy directly determines the positioning accuracy and operational stability of the transmission system. Currently, traditional rack manufacturing mainly adopts integral milling or grinding processes.

[0003] In the existing process of processing racks, especially long racks, the workpiece is prone to deformation due to insufficient rigidity, which leads to excessive pitch error. The surface finish and tooth direction tolerance rely on high-precision machine tools and complex tooling, resulting in high processing costs. Furthermore, it is impossible to adjust local precision deviations during subsequent assembly. If the rack teeth are worn or damaged, the entire rack needs to be replaced, resulting in resource waste and downtime losses. Utility Model Content

[0004] The purpose of this invention is to provide a high-precision rack that is easy to manufacture, in order to solve the problems mentioned in the background art. In the existing rack processing, especially for long racks, the workpiece is prone to deformation due to insufficient rigidity, resulting in excessive pitch error. The surface finish and tooth direction tolerance rely on high-precision machine tools and complex tooling, resulting in high processing costs. Furthermore, it is impossible to adjust local precision deviations during subsequent assembly. If the rack teeth are worn or damaged, the entire rack needs to be replaced, causing resource waste and downtime losses.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rack body composed of a toothed block one and a toothed block two;

[0006] The left and right sides of the tooth block 1 and tooth block 2 are respectively provided with receiving grooves and slots, and the upper surfaces of the tooth block 1 and tooth block 2 are each equipped with a number of teeth.

[0007] Two clamping plates are respectively set in two receiving slots. The left and right ends of the front and rear sides of the toothed block are provided with positioning holes that communicate with the clamping slots. The back end of the two clamping plates is provided with a through hole.

[0008] Two fixed plates are respectively installed in two through holes. A slide rod is installed through the fixed plates. Two movable plates are slidably installed on the slide rod. Two connecting plates are installed at opposite ends of the two movable plates. The same positioning pin is installed at one end of the two connecting plates on the same side.

[0009] The slide rod is fitted with two first springs, and the two ends of the first springs are fixedly connected to the movable plate and the fixed plate respectively. One end of the card plate located at the left end extends into the card groove located at the right end, and one end of the positioning pin extends out of the positioning hole.

[0010] The card plate is equipped with a retraction component.

[0011] Using the above solution, the two toothed blocks can be quickly spliced ​​and fixed by the cooperation of the clamping plate, positioning pin, and first spring. The preload provided by the first spring can reduce the assembly gap and ensure the overall accuracy after splicing. The rack body is split into toothed block one and toothed block two, eliminating the need for integrated machining of ultra-long or ultra-large racks, reducing reliance on large processing equipment, reducing the difficulty of precision control in single-piece production, and facilitating partial replacement. Wear of a single toothed block does not require the entire unit to be scrapped, reducing subsequent maintenance costs. The retraction component makes it easy to retract the clamping plate into the receiving slot when not in use, making the process more convenient and improving operational efficiency.

[0012] In a preferred embodiment, the retraction assembly includes two sets of second springs, with two springs in each set. The two sets of second springs are respectively installed in two receiving slots, and one end of the second spring is fixedly connected to a retaining plate on the same side.

[0013] Using the above solution, the elastic force of the second spring can automatically pop the clamp plate out of the slot when the clamp plate is used, without the need for manual prying, reducing the damage to the gear block or the clamp plate caused by external pulling force, protecting the precision of the parts. During assembly, the second spring can apply continuous pressure to the clamp plate to ensure that the clamp plate fits tightly with the slot, avoiding the clamp plate from loosening due to vibration during long-term use, and maintaining the stability of the rack and pinion transmission.

[0014] In a preferred embodiment, a telescopic rod is provided inside the second spring. The telescopic rod is installed in the receiving groove, and the telescopic shaft of the telescopic rod is fixedly connected to the card plate on the same side.

[0015] By adopting the above scheme, a telescopic rod is set up to limit the extension and retraction direction of the second spring, preventing the spring from bending or deviating after long-term stress or vibration. This ensures that the spring always exerts force in the preset direction, guaranteeing the stability of the retraction or pre-tensioning function. The telescopic rod can also serve as an auxiliary support for the clamping plate, reducing the deformation of the clamping plate under stress and further ensuring the rigidity of the splice between tooth block one and tooth block two, thus preventing the deformation of the clamping plate from affecting the transmission accuracy of the rack body.

[0016] In a preferred embodiment, the left and right ends of the front and rear sides of the second toothed block are provided with circular positioning channels that communicate with the receiving grooves. The front and rear sides of the opposite ends of the two card plates are provided with placement grooves. A positioning rod is provided in the placement groove, and one end of the positioning rod extends through the positioning channel.

[0017] By adopting the above solution, a positioning rod is set up, and the positioning rod works in conjunction with the placement groove and positioning channel to fix the card plate extending into the receiving groove. This prevents the card plate from shaking during the splicing process in the slot, improves the overall transmission accuracy, eliminates the need for repeated measurement and adjustment, and quickly aligns the positions of tooth block one and tooth block two, thereby improving assembly efficiency.

[0018] In a preferred embodiment, a protective sleeve is fitted onto one end of the positioning rod extending out of the positioning channel. Support plates are installed on both the upper and lower sides of the protective sleeve, and locking bolts are threaded onto the support plates. The locking bolts are threadedly connected to the toothed block.

[0019] By adopting the above scheme, by setting up a protective cylinder, a support plate, and a locking bolt, the protective cylinder can wrap around one end of the positioning rod that extends outward. On the one hand, it intercepts and locks the positioning rod to prevent it from extending out of the positioning channel due to external force, thus ensuring its long-term positioning accuracy. On the other hand, it indirectly forms a secondary lock on the positioning rod to prevent it from loosening during long-term use, further improving the reliability of the rack and pinion structure. Combined with the function of the locking bolt, it is convenient to disassemble the protective cylinder at any time.

[0020] In a preferred embodiment, the base material of the first and second tooth blocks is steel, and its surface is heat-treated to ensure the rigidity and deformation resistance of the base. The tooth material is high-speed steel, and its tooth surface is ground to improve the wear resistance and transmission accuracy of the tooth.

[0021] The above scheme utilizes tempered steel for the base material to ensure overall rigidity and resistance to deformation, preventing the rack body from bending under stress. High-speed steel is used for the teeth in combination with grinding treatment to improve the wear resistance of the teeth and extend their service life. At the same time, the grinding treatment can ensure the tooth profile accuracy and meet high precision requirements, eliminating the need to use expensive high-speed steel for the whole structure.

[0022] In a preferred embodiment, grooves are provided on both the front and rear sides of the first and second tooth blocks, and mounting plates are hinged in the grooves. Mounting bolts are threaded onto the mounting plates, and intercepting plates are installed at both the front and rear ends of the slide rod, with the intercepting plates located between two connecting plates on the same side.

[0023] By adopting the above solution, the assembled tooth block one and tooth block two can be quickly fixed to the equipment by using the cooperation of the mounting plate and mounting bolt. There is no need to process complex installation structures on the rack body, which simplifies the manufacturing and installation process. The intercepting plate can limit the sliding range of the movable plate, preventing the positioning pin from falling off or the first spring from being damaged due to excessive sliding, thus ensuring the stability and service life of the core transmission components.

[0024] As a preferred embodiment, the teeth on the first and second gear blocks adopt an involute tooth profile, which conforms to general transmission standards, is compatible with common gears on the market, and reduces equipment matching costs.

[0025] Using the above solution, the involute tooth profile of the gear teeth is a universal transmission tooth profile that can be directly adapted to common standard gears on the market. There is no need to customize special gears for the rack body, which reduces the design and procurement costs of the equipment. The meshing characteristics of the involute tooth profile are stable, with high transmission efficiency and low noise.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] This easy-to-manufacture high-precision rack, through the cooperation of a clamping plate, positioning pins, and a first spring, can quickly splice and fix two rack blocks together. The preload provided by the first spring can reduce the assembly gap and ensure the overall accuracy after splicing. The rack body is divided into rack block one and rack block two, eliminating the need for integrated machining of ultra-long or ultra-large racks, reducing reliance on large processing equipment, and reducing the difficulty of precision control in single-piece production. The detachable structure facilitates partial replacement, and wear of a single rack block does not require the entire unit to be scrapped, reducing later maintenance costs. The retraction component makes it easy to retract the clamping plate into the receiving slot when not in use, making the process more convenient and improving operational efficiency.

[0028] The high-precision rack and pinion second spring, which is easy to manufacture, can automatically eject the clamp from the slot when the clamp is used, without the need for manual prying. This reduces the damage to the rack and pinion or the clamp caused by external pulling force, protects the precision of the parts, and allows the second spring to apply continuous pressure to the clamp during assembly, ensuring that the clamp fits tightly with the slot and preventing the clamp from loosening due to vibration during long-term use, thus maintaining the stability of the rack and pinion transmission. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the front cross-sectional structure of the tooth block of this utility model;

[0031] Figure 3 This is a schematic diagram of the main structure of the fixing plate of this utility model.

[0032] In the diagram: 1. Tooth block one; 2. Tooth block two; 3. Tooth tooth; 4. Clamping plate; 5. Fixing plate; 6. Movable plate; 7. First spring; 8. Connecting plate; 9. Positioning pin; 10. Second spring; 11. Telescopic rod; 12. Positioning rod; 13. Protective cylinder; 14. Support plate; 15. Locking bolt; 16. Mounting plate; 17. Mounting bolt; 18. Slot; 19. Positioning hole; 20. Groove; 21. Interceptor plate; 22. Receiving groove; 23. Sliding rod. Detailed Implementation

[0033] Please see Figure 1-3 This utility model provides a high-precision rack that is easy to manufacture, comprising a rack body composed of a tooth block 1 and a tooth block 2;

[0034] The left and right sides of the tooth block 1 and the tooth block 2 are respectively provided with receiving grooves 22 and slots 18, and the upper surfaces of the tooth block 1 and the tooth block 2 are each equipped with several teeth 3.

[0035] Two card plates 4 are respectively set in two receiving slots 22. The left and right ends of the front and rear sides of the toothed block 2 are provided with positioning holes 19 that communicate with the card slot 18. The back end of the two card plates 4 is provided with a through hole.

[0036] Two fixed plates 5 are installed in two through holes respectively. A slide rod 23 is installed through the fixed plate 5. Two movable plates 6 are slidably installed on the slide rod 23. Two connecting plates 8 are installed on the opposite ends of the two movable plates 6. The same positioning pin 9 is installed on one end of the two connecting plates 8 on the same side.

[0037] Among them, two first springs 7 are sleeved on the slide rod 23. The two ends of the first springs 7 are fixedly connected to the movable plate 6 and the fixed plate 5 respectively. One end of the card plate 4 located at the left end extends into the card groove 18 located at the right end, and one end of the positioning pin 9 extends out of the positioning hole 19.

[0038] The clamping plate 4 is equipped with a retraction component. Through the cooperation of the clamping plate 4, the positioning pin 9, and the first spring 7, the two tooth blocks can be quickly spliced ​​and fixed. The preload provided by the first spring 7 can reduce the assembly gap and ensure the overall accuracy after splicing. The rack body is split into tooth block 1 and tooth block 2, eliminating the need for integrated machining of ultra-long or ultra-large racks, reducing reliance on large processing equipment, and reducing the difficulty of precision control in single-piece production. The split structure facilitates partial replacement, and wear of a single tooth block does not require the entire unit to be scrapped, reducing later maintenance costs. The retraction component makes it easy to retract the clamping plate 4 into the receiving slot 22 when not in use, making the process more convenient and improving operational efficiency.

[0039] The retraction assembly includes two sets of second springs 10, with two springs in each set. The two sets of second springs 10 are respectively installed in two receiving slots 22. One end of the second spring 10 is fixedly connected to the clamping plate 4 on the same side. The elastic force of the second spring 10 can automatically pop the clamping plate 4 out of the slot 18 when the clamping plate 4 is used, without manual prying, reducing the damage to the gear block 1 or the clamping plate 4 caused by external pulling force, protecting the precision of the parts. During assembly, the second spring 10 can apply continuous pressure to the clamping plate 4 to ensure that the clamping plate 4 fits tightly with the slot 18, avoiding the clamping plate 4 from loosening due to vibration during long-term use, and maintaining the stability of the rack and pinion transmission.

[0040] The second spring 10 is equipped with a telescopic rod 11, which is installed in the receiving groove 22. The telescopic shaft of the telescopic rod 11 is fixedly connected to the clamping plate 4 on the same side. By setting the telescopic rod 11, the telescopic rod 11 can limit the extension and retraction direction of the second spring 10, so as to avoid the spring bending or deflection after long-term stress or vibration, and ensure that the spring always exerts force in the preset direction, thus ensuring the stability of the retraction or pre-tightening function. The telescopic rod 11 can also serve as an auxiliary support for the clamping plate 4, reducing the deformation of the clamping plate 4 under stress, further ensuring the rigidity of the splice between the tooth block 1 and the tooth block 2, and preventing the deformation of the clamping plate 4 from affecting the transmission accuracy of the rack body.

[0041] Both ends of the front and rear sides of the toothed block 2 have circular positioning channels that communicate with the receiving groove 22. Both ends of the two clamping plates 4 have placement grooves on the front and rear sides of their opposite ends. A positioning rod 12 is installed in the placement groove. One end of the positioning rod 12 extends through the positioning channel. By setting the positioning rod 12, the clamping plate 4 extending out of the receiving groove 22 is fixed by the positioning rod 12 cooperating with the placement groove and the positioning channel. This prevents the clamping plate 4 from shaking during the splicing process in the clamping groove 18, improves the overall transmission accuracy, eliminates the need for repeated measurement and adjustment, and quickly aligns the positions of toothed block 1 and toothed block 2, thus improving assembly efficiency.

[0042] A protective sleeve 13 is sleeved on one end of the positioning rod 12 that extends out of the positioning channel. Support plates 14 are installed on both the upper and lower sides of the protective sleeve 13. Locking bolts 15 are threaded on the support plates 14 and are threaded to the toothed block 1. By setting the protective sleeve 13, support plates 14 and locking bolts 15, the protective sleeve 13 can wrap around the end of the positioning rod 12 that extends outward. On the one hand, it intercepts and locks the positioning rod 12 to prevent it from extending out of the positioning channel due to external force, thus ensuring its long-term positioning accuracy. On the other hand, it indirectly forms a secondary lock on the positioning rod 12 to prevent it from loosening during long-term use, further improving the reliability of the overall structure of the rack. Combined with the function of the locking bolts 15, it is convenient to disassemble the protective sleeve 13 at any time.

[0043] The base material of tooth block 1 and tooth block 2 is steel, and its surface is heat-treated to ensure the rigidity and deformation resistance of the base. Tooth 3 is made of high-speed steel, and its tooth surface is ground to improve the wear resistance and transmission accuracy of the tooth. The use of heat-treated steel for the base ensures the overall rigidity and deformation resistance, preventing the rack body from bending under stress. The use of high-speed steel combined with grinding treatment for tooth 3 improves the wear resistance of the tooth and extends its service life. At the same time, the grinding treatment can ensure the tooth profile accuracy and meet the high precision requirements, eliminating the need to use expensive high-speed steel for the whole.

[0044] Both the front and rear sides of tooth block 1 and tooth block 2 are provided with grooves 20. Mounting plates 16 are hinged in the grooves 20. Mounting bolts 17 are threaded on the mounting plates 16. Both the front and rear ends of the slide rod 23 are equipped with intercepting plates 21. The intercepting plates 21 are located between the two connecting plates 8 on the same side. By using the cooperation of the mounting plates 16 and the mounting bolts 17, the spliced ​​tooth blocks 1 and 2 can be quickly fixed to the equipment without the need for additional complex installation structures on the rack body, simplifying the manufacturing and installation process. The intercepting plates 21 can limit the sliding range of the movable plate 6, preventing the positioning pin 9 from falling off or the first spring 7 from being overstretched and damaged due to excessive sliding of the movable plate 6, thus ensuring the stability and service life of the core transmission components.

[0045] The teeth 3 on tooth block 1 and tooth block 2 adopt involute tooth profile, which conforms to general transmission standards and is compatible with common gears on the market, reducing equipment matching costs. The involute tooth profile of tooth 3 is a general transmission tooth profile, which can be directly adapted to common standard gears on the market. There is no need to customize special gears for the rack body, reducing the design and procurement costs of equipment matching. The meshing characteristics of involute tooth profile are stable, with high transmission efficiency and low noise.

[0046] When using

[0047] Remove the card plate 4: Move the card plate 4 outward. When the card plate 4 moves, it will cause the telescopic rod 11 and the second spring 10 to be stretched. When one end of the card plate 4 moves out of the receiving groove 22, then place one end of the positioning rod 12 into the positioning channel, and then move the positioning rod 12. At this time, one end of the positioning rod 12 extends into the placement groove on the card plate 4. Then position the card plate 4, and then lock the protective cylinder 13 into one end of the positioning rod 12. Rotate the locking bolt 15 to fix the protective cylinder 13.

[0048] Assemble tooth block 1 and tooth block 2: Move the positioning pin 9 into the through hole. At this time, the movement of the positioning pin 9 drives the connecting plate 8 to move. The movement of the connecting plate 8 drives the movable plate 6 to slide on the slide rod 23. At this time, the sliding of the movable plate 6 squeezes the first spring 7. Then, the positioning pin 9 retracts into the through hole and places tooth block 1 on one side of tooth block 2. At this time, one end of the clamping plate 4 gradually enters the clamping groove 18. When the clamping plate 4 moves and drives the positioning pin 9 to the position corresponding to the positioning hole 19, the movable plate 6 is driven by the reaction force of the first spring 7 to extend one end of the positioning pin 9 into the positioning hole 19, thereby fixing tooth block 1 and tooth block 2 together.

[0049] Installing tooth block 1 and tooth block 2: When it is necessary to fix tooth block 1 and tooth block 2, fold the mounting plate 16 outward. At this time, the mounting plate 16 changes from a vertical state to a horizontal state. Then rotate the mounting bolt 17 to fix tooth block 1 and tooth block 2 with threads, which also facilitates the disassembly work later.

Claims

1. A high-precision rack that is easy to manufacture, characterized in that: It includes a rack body composed of tooth block one (1) and tooth block two (2); The left and right sides of the tooth block 1 (1) and tooth block 2 (2) are respectively provided with receiving groove (22) and slot (18), and the upper surface of the tooth block 1 (1) and tooth block 2 (2) is provided with a number of teeth (3). Two card plates (4) are respectively set in two receiving slots (22). The left and right ends of the front and rear sides of the tooth block (2) are provided with positioning holes (19) that communicate with the card slot (18). The back end of the two card plates (4) is provided with through holes. Two fixed plates (5) are installed in two through holes respectively. A slide rod (23) is installed through the fixed plate (5). Two movable plates (6) are slidably installed on the slide rod (23). Two connecting plates (8) are installed at opposite ends of the two movable plates (6). The same positioning pin (9) is installed at one end of the two connecting plates (8) on the same side. Among them, two first springs (7) are sleeved on the slide rod (23). The two ends of the first springs (7) are fixedly connected to the movable plate (6) and the fixed plate (5) respectively. One end of the card plate (4) located on the left end extends into the card groove (18) located on the right end, and one end of the positioning pin (9) extends out of the positioning hole (19). The card plate (4) is equipped with a retraction component.

2. The high-precision rack that is easy to manufacture according to claim 1, characterized in that: The retraction assembly includes two sets of second springs (10), each set of second springs (10) consists of two springs, and the two sets of second springs (10) are respectively installed in two receiving slots (22). One end of the second spring (10) is fixedly connected to the card plate (4) on the same side.

3. The high-precision rack that is easy to manufacture according to claim 2, characterized in that: The second spring (10) is provided with a telescopic rod (11), which is installed in the receiving groove (22). The telescopic shaft of the telescopic rod (11) is fixedly connected to the card plate (4) on the same side.

4. The high-precision rack that is easy to manufacture according to claim 1, characterized in that: The toothed block 2 (2) has circular positioning channels connected to the receiving groove (22) on both the left and right ends of its front and rear sides. The two card plates (4) have placement grooves on both the front and rear sides of their opposite ends. A positioning rod (12) is provided in the placement groove. One end of the positioning rod (12) extends through the positioning channel.

5. The high-precision rack that is easy to manufacture according to claim 4, characterized in that: The positioning rod (12) extends out of the positioning channel and is fitted with a protective cylinder (13). The upper and lower sides of the protective cylinder (13) are equipped with support plates (14). The support plates (14) are threaded with locking bolts (15). The locking bolts (15) are threadedly connected to the tooth block (1).

6. The high-precision rack that is easy to manufacture according to claim 1, characterized in that: The base material of the tooth block one (1) and tooth block two (2) is steel, and its surface is heat treated to ensure the rigidity and deformation resistance of the base. The tooth (3) is made of high-speed steel, and its tooth surface is ground to improve the wear resistance and transmission accuracy of the tooth.

7. The high-precision rack that is easy to manufacture according to claim 1, characterized in that: The front and rear sides of the tooth block 1 (1) and tooth block 2 (2) are provided with grooves (20), and mounting plates (16) are hinged in the grooves (20). Mounting bolts (17) are threaded on the mounting plates (16). The front and rear ends of the slide rod (23) are both equipped with intercepting plates (21), and the intercepting plates (21) are located between two connecting plates (8) on the same side.

8. The high-precision rack that is easy to manufacture according to claim 1, characterized in that: The teeth (3) on the first tooth block (1) and the second tooth block (2) adopt an involute tooth profile, which conforms to the general transmission standard, is compatible with common gears on the market, and reduces the equipment matching cost.

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