Stable grating ruler
By designing a resonant component and main scale structure for a stable grating ruler, the problems of vibration and contamination during high-speed movement of the grating ruler were solved, thereby improving the stability and accuracy of the reading head and enhancing the measurement accuracy and anti-contamination capability of the grating ruler.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-31
- Publication Date
- 2026-04-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In existing optical scales, the measuring carriage is prone to vibration during high-speed movement, which makes the reading head unstable and affects the reading accuracy. Furthermore, the optical scale strips are easily contaminated, reducing the measurement accuracy.
A stable grating ruler was designed. Through the resonant components and main ruler structure, including components such as grating placement plate, guide rail, sliding block, push plate, limiting slider, connecting plate, transmission plate, guide post and roller, a stable resonant system is formed, which reduces friction and enhances stability. The grating strip is protected by sealing strip and end cap to prevent contamination.
It improves the stability and accuracy of the reading head, reduces the vibration of the signal transmitter, protects the grating strip, and enhances the measurement accuracy and service life of the grating ruler.
Smart Images
Figure CN121848207A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of grating rulers, and more specifically to a stable grating ruler. Background Technology
[0002] An optical grating ruler is a device for detecting linear displacement. Also known as an optical grating ruler displacement sensor, it is a measurement feedback device that works using the optical principle of an optical grating. Optical grating rulers are commonly used in closed-loop servo systems of CNC machine tools to observe whether there are errors in the tool feed, thus compensating for tool movement errors. Therefore, optical grating rulers are widely used in various precision machining tools. Existing optical grating rulers fix the grating strip to the inner wall of the main scale, and the measuring carriage drives the reading head to move above the grating strip. The optical sensor measures the reading head, which can adjust the machine tool feed, making the tool feed more accurate. It is also durable, convenient, and easy to operate.
[0003] In the operation of existing grating rulers, the measuring carriage needs to drive the reading head to achieve the purpose of reading. However, after the reading head moves to a fixed position, its own stability is poor, resulting in a decrease in the accuracy of the reading. Moreover, in the existing technology, the measuring carriage of the reading head is heavy, and when the machine tool moves at high speed, the measuring carriage will jump, thus affecting the measurement accuracy. In order to solve the problem of unstable reading caused by the jumping of the measuring carriage during the operation of the grating ruler, the existing technology solves this problem by mounting the measuring carriage on the top of the reading head to drive the reading head and adding several rolling bearings to the measuring carriage. However, it cannot guarantee that the main scale will vibrate during the high-speed movement of the measuring carriage, thereby causing the grating strip to vibrate, making the reading head unstable and resulting in inaccurate readings.
[0004] In view of the above, in order to overcome the above technical problems, the present invention designs a stable grating ruler, which solves the above technical problems. Summary of the Invention
[0005] The technical problem to be solved by the present invention is that the existing grating ruler cannot guarantee that the main scale will vibrate during the high-speed movement of the measuring carriage, thereby causing the grating strip to vibrate, which makes the reading head unstable and the reading inaccurate. In addition, the grating strip is exposed and is easily contaminated by oil, which affects the accuracy of the grating ruler.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] This invention provides a stable optical grating ruler, comprising an optical grating strip, a reading head, a signal transmitter, a sealing strip, and an end cap; the optical grating strip is mounted on the outer surface of an optical grating placement plate, the reading head is mounted on the upper part of the optical grating strip, and the signal transmitter is mounted on a transmission plate and connected to the reading head; it also includes a resonance component and a main scale; the resonance component is mounted in the internal cavity of the main scale; the resonance component fixes the reading head and the signal transmitter, causing the signal transmitter to drive the reading head to move along the direction of the main scale, and also keeping the distance between the reading head and the optical grating strip consistent, making the optical grating ruler more stable.
[0008] The resonant assembly includes a grating placement plate, a spring, a guide rail, a sliding block, a push plate, a limiting slider, a connecting plate, a transmission plate, guide pillars, and rollers. The bottom of the grating placement plate is engaged with one end of the spring, and the other end of the spring is connected to the bottom of the grating fixing groove. The guide rail is fixedly installed on both sides of the grating placement plate and is slidably connected to the sliding block. The inner wall of the sliding block slides on the outer surface of the guide rail. If the sliding block vibrates, it will drive the grating placement plate to vibrate together through the guide rail. The push plate is fixedly installed with the sliding block. The limiting slider is symmetrically slidably installed on the inner wall of the main scale. The connecting plate is fixedly installed with the push plate and the limiting slider. The connecting plate is fixedly installed at the bottom of the transmission plate. The top of the transmission plate has a groove for placing a signal transmitter, making the signal transmitter more stable. The high-speed movement of the sliding block will generate vibration, which is connected to the grating placement plate through the guide rail, so that the grating placement plate and the sliding block resonate at the same frequency to reduce the reading error of the reading head and improve the stability of the resonant assembly.
[0009] The limiting slider has an "L" shaped cross-section and a rectangular bottom. A semi-circular rolling groove is provided at the bottom of the limiting slider, penetrating through the bottom. The rollers are slidably mounted on the inner wall of the semi-circular rolling groove. The top of the limiting slider is fixedly mounted on both sides of the connecting plate. The limiting slider reduces the lateral offset of the transmission plate. The lower part of the limiting slider is slidably mounted on the inner wall of the limiting groove, and the rollers are slidably mounted on the bottom of the limiting groove. By using the rollers, the limiting slider changes from sliding friction to rolling friction, reducing the frictional force of the slider and making the thrust required by the transmission plate smaller, thereby improving the smooth operation of the resonant assembly.
[0010] The push plate has an isosceles trapezoidal structure. The short side of the push plate is fixedly mounted on the sliding block, and the long side is fixedly mounted on the connecting plate. The isosceles trapezoidal structure concentrates the thrust, increasing the thrust acting on the sliding block and thus improving the stability of the resonant assembly. The push plate has rounded corners on both sides, which reduces the gap when passing through the middle of the sealing strip, thereby reducing the impact of contamination on the resonant assembly. The sealing strip is made of rubber and is slidably connected to the inner wall of the main scale. The sealing strip is placed in pairs to prevent contamination of the main scale chamber and affect the accuracy of the reading head. A rectangular groove is opened in the middle of the push plate, and the ends of the rectangular groove are rounded. The signal transmission line of the reading head passes through the groove and the sealing strip to connect to the signal transmitter, reducing the wear of the signal transmission line. The roller rolls in the semi-circular sliding groove to reduce the friction of the limiting slider, so that the transmission plate provides more force to the push plate. The push plate concentrates the dispersed thrust, so only a small force is needed to push the sliding block to move. When the resonant assembly vibrates, the isosceles trapezoidal structure of the push plate disperses the torque to the transmission plate, making the resonant assembly more stable.
[0011] The sliding block has a rectangular structure with a limiting groove at its bottom. The reading head is fixedly installed in the limiting groove. Connecting holes are provided on both the front and rear sides of the sliding block, connecting to the limiting groove and the reading head. Screws are used to fix the reading head in the limiting groove. A T-shaped groove is provided at the bottom of the sliding block, slidably connecting to a guide rail. This ensures the sliding block can slide axially along the guide rail, while being restricted vertically by the guide rail. Symmetrical oblique grooves are provided on both sides of the upper part of the sliding block. Compared to horizontal or vertical grooves, oblique grooves are more effective at resisting axial and horizontal offsets. The openings of the oblique grooves face upwards. The diameter of the circular structure at the bottom of the inclined slide groove is larger than the width of the upper part of the inclined slide groove, making it less likely for the sliding block to fall off when connected to the round-headed guide rail, thereby improving the stability of the resonant component. At the same time, the engagement of the circular structure at the bottom of the inclined slide groove with the round-headed guide rail increases the contact area between the inclined slide groove and the round-headed guide rail, thereby reducing the gap between the round-headed guide rail and the inclined slide groove, which greatly reduces the vibration of the resonant component. After long-term wear, the sliding block will be more prone to vibration. The inclined groove effectively reduces the lateral displacement of the sliding block. When the sliding block vibrates up and down, it will drive the guide rail to move, thereby reducing the vibration of the sliding block and allowing the resonant component to work better.
[0012] The grating placement plate has a rectangular structure with a grating groove in the middle. The grating strip is fixedly installed on the outer surface of the grating groove. The grating groove is rectangular with rounded corners at the top edge to facilitate the installation of the grating strip and prevent damage to the reading head from the edge of the grating groove. Multiple sliding holes are symmetrically opened on both sides of the grating placement plate. The outer surface of the guide post is slidably installed on the inner wall of the sliding hole. The guide post is used to fix the grating placement plate and prevent the grating fixing plate from shifting laterally. At the same time, it ensures that the grating placement plate can only move along the direction of the guide post. Multiple retaining spring grooves are symmetrically opened on both sides of the bottom of the grating placement plate. The spring is engaged with the inner wall of the retaining spring groove. The spring is used to reduce the vibration of the grating placement plate and absorbs the vibration of the sliding block through the guide rail, thereby making the operation of the resonant component more stable.
[0013] The guide rail consists of two connected T-shaped plates, arranged alternately vertically. The guide rail has a double "T" shaped cross-section and is symmetrically installed on both sides of the grating placement plate. The guide rail on both sides makes the sliding block more stable. The top of the guide rail is slidably connected to the inner wall of the T-shaped groove. The "T" shaped structure of the slide rail prevents the sliding block from affecting the slide rail when it moves back and forth. However, when the sliding block vibrates, the guide rail restricts the lateral vibration of the sliding block, and the cavity of the guide rail can absorb the lateral vibration, reducing the lateral offset of the grating placement plate, reducing the wear of the grating placement plate, and protecting the grating placement plate. At the same time, it makes the sliding block more stable and improves the stability of the resonant component. When the sliding block vibrates up and down, it will drive the guide rail to vibrate up and down. Since the guide rail is fixedly connected to the grating placement plate, the grating placement plate will also vibrate up and down, and the distance between it and the sliding block remains unchanged. When the sliding block shifts vertically, it can drive the guide rail to shift vertically by the same distance, thereby making the resonant component more stable.
[0014] The main scale has a rectangular structure with a convex internal cavity. This convex cavity facilitates airflow within the enclosed space, reducing the impact of air pressure on the resonant assembly and increasing its stability. Sufficient space is provided within the main scale's internal cavity for adjusting the reading head. Symmetrical limiting grooves are provided on both sides of the top of the main scale, and fixing plates are located on both sides. These fixing plates are rectangular and have multiple fixing holes arranged in an array to secure the main scale with screws. End caps are fixed to both ends of the main scale and have ventilation holes to reduce the impact of air pressure on the resonant assembly. The end caps also prevent the sealing strip from slipping off the slider, reducing the failure rate of the grating ruler and thus improving the working efficiency of the resonant assembly.
[0015] A grating plate fixing groove is provided at the bottom of the internal cavity of the main scale. The grating plate fixing groove has an inverted "convex" shape. This inverted "convex" shape prevents the grating plate and the sliding block from being in the same cavity, thus preventing damage to the grating strip during the installation of the sliding block, which would affect the reading accuracy of the resonant component. It also prevents the grating plate from contacting the main scale, which would cause oil stains to affect the grating plate, thereby preventing contamination of the grating strip and improving the accuracy and service life of the resonant component. The spring is installed at the bottom of the grating fixing groove. The spring is used to dampen the vertical vibration of the grating plate and prevent the bottom of the grating plate from contacting the grating fixing groove, reducing wear. Multiple guide posts are symmetrically fixed on both sides of the grating fixing groove. The outer surface of the guide posts is slidably connected to the inner wall of the grating plate, thereby restricting the movement direction of the grating plate. This allows the grating plate to only move up and down reciprocally driven by the guide rail. At the same time, the guide posts reduce the offset of the grating plate and absorb the lateral vibration of the guide rail, thereby reducing the offset of the grating plate and improving the stability of the resonant component.
[0016] The upper part of the internal cavity of the main scale is equipped with multiple round-headed guide rails. When the sliding block slides on the round-headed guide rails, the effect of vertical vibration is greater than that of lateral vibration, thereby reducing the effect of lateral vibration on the sliding block and making the resonant component more resistant to lateral vibration. The round-headed guide rails can engage with the inclined groove to reduce the lateral offset of the sliding block. At the same time, the round-headed structure can also prevent the sliding block from slipping out of the round-headed guide rails. The round-headed guide rails are installed symmetrically in an inverted "eight" shape, with the round-headed guide rails not contacting each other and the included angle between the round-headed guide rails being 90°. The inverted "eight" symmetrical installation can reduce the lateral offset of the round-headed guide rails, adjust the vibration direction of the sliding block to vertical vibration, make the vertical vibration more stable, and thus reduce the accuracy of the reading head. A fixed rod is installed on the upper end face of the round-headed guide rail. The fixed rod is connected to the pressure rod pin, and the pressure rod is slidably connected to the lever. When the sliding block slides on the round-headed guide rail and vibrates, the fixed rod fixed to the upper end face of the round-headed guide rail drives the pressure rod to move. The pressure rod pushes the lever to lift one end of the lever. The vibration is absorbed by the spring at the bottom of the grating placement plate, thereby making the round-headed guide rail more stable and the sliding block slides more smoothly, thus improving the stability of the resonant component.
[0017] The beneficial effects of this invention are as follows:
[0018] 1. By incorporating a resonant component, this invention solves the problem of vibration generated by the reading head during high-speed movement, which leads to inaccurate reading of the grating strip. This improves the stability and accuracy of the reading.
[0019] 2. By setting a main scale, this invention solves the problem of vibration caused by friction in the signal transmitter during movement, reduces the sliding friction of the signal transmitter, lowers the vibration of the signal transmitter, improves the stability of the resonant component, and thus improves the accuracy of the grating scale.
[0020] 3. By setting up a grating placement plate, this invention solves the problem of inaccurate readings caused by the grating strip being exposed and easily contaminated. By installing the grating strip inside the grating placement plate, the grating strip is protected and the accuracy of the grating ruler is improved. Attached Figure Description
[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0022] The above and other aspects of the invention will now be described by way of example only, with reference to the accompanying drawings, in which:
[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0024] Figure 2 This is a schematic diagram of the internal structure of the present invention;
[0025] Figure 3 This is an enlarged view of the internal structure of the present invention;
[0026] Figure 4 This is a schematic diagram of the structure of the resonant component of the present invention;
[0027] Figure 5 This is a schematic diagram of the main scale of the present invention;
[0028] Figure 6 This is a schematic diagram of the transmission plate of the present invention;
[0029] Figure 7 This is a schematic diagram illustrating the positional relationship between the slider and the roller in this invention;
[0030] Figure 8 This is a schematic diagram showing the positional relationship between the push plate and the sliding block of the present invention;
[0031] Figure 9 This is a cross-sectional view of the sliding block of the present invention;
[0032] Figure 10 This is a schematic diagram of the structure of the grating placement plate of the present invention;
[0033] Figure 11This is a cross-sectional view of the grating placement plate of the present invention;
[0034] Figure 12 This is a cross-sectional view of the main scale of this invention.
[0035] In the diagram: 1. Grating strip; 2. Signal transmitter; 3. Reading head; 4. Sealing strip; 5. End cap; 6. Resonance assembly; 61. Transmission plate; 62. Connecting plate; 63. Limiting slider; 631. Semi-circular rolling groove; 64. Roller; 65. Push plate; 651. Wire groove; 66. Sliding block; 661. Inclined slide groove; 662. T-shaped slide groove; 663. Limiting groove; 664. Connecting hole; 67. Grating placement plate; 671. Snap ring groove; 672. Sliding hole; 673. Grating groove; 68. Guide rail; 69. Spring; 7. Main scale; 71. Limiting slide groove; 72. Grating fixing groove; 73. Round head guide rail; 74. Fixing plate; 741. Fixing hole; 75. Guide post; 76. Fixing rod; 77. Pressure rod; 78. Lever. Detailed Implementation
[0036] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0037] like Figures 1 to 12 As shown, the present invention provides a stable grating ruler, including a grating strip 1, a reading head 3, a signal transmitter 2, a sealing strip 4, and an end cap 5; the grating strip 1 is installed on the outer surface of the grating placement plate 67, the reading head 3 is installed on the upper part of the grating strip 1, and the signal transmitter 2 is installed on the transmission plate 61, and the signal transmitter 2 is connected to the reading head 3; it also includes a resonance component 6 and a main scale 7; the resonance component 6 is installed in the internal cavity of the main scale 7; the resonance component 6 fixes the reading head 3 and the signal transmitter 2, so that the signal transmitter 2 drives the reading head 3 to move along the direction of the main scale 7, and keeps the distance between the reading head 3 and the grating strip 1 consistent, making the grating ruler more stable.
[0038] During operation: the resonant component 6 drives the signal transmitter 2 to move on the main scale 7. The sealing strip 4 is fixedly installed in the cavity of the main scale 7 to prevent the cavity of the main scale 7 from being contaminated. The end cap 5 is installed on both sides of the main scale 7 to prevent the sealing strip 4 from detaching from the resonant component 6. The grating strip 1 is installed directly below the reading head 3. The reading head 3 moves directly above the grating strip 1 under the drive of the resonant component 6. The reading head 3 then transmits the reading signal to the signal transmitter 2.
[0039] like Figures 2 to 4As shown, the resonance assembly 6 includes a transmission plate 61, a connecting plate 62, a limiting slider 63, a roller 64, a push plate 65, a sliding block 66, a grating placement plate 67, a guide rail 68, and a spring 69. The transmission plate 61 is fixedly installed on the upper part of the connecting plate 62. A groove is provided on the top of the transmission plate 61 for placing the signal transmitter 2, making the signal transmitter 2 more stable. The connecting plate 62 is fixedly installed with the limiting slider 63 and the push plate 65. The limiting slider 63 is symmetrically slidably installed on the inner wall of the main scale 7. The push plate 65 is fixedly installed with the sliding block 66, and the sliding block 66 is slidably connected to the guide rail 68. Next, guide rails 68 are fixedly installed on both sides of the grating placement plate 67. The bottom of the grating placement plate 67 is engaged with one end of the spring 69, and the other end of the spring 69 is connected to the bottom of the grating fixing groove 72. The guide rails 68 are fixedly installed on both sides of the grating placement plate 67. The guide rails 68 are slidably connected with the sliding block 66. The inner wall of the sliding block 66 slides on the outer surface of the guide rail 68. The high-speed movement of the sliding block 66 will generate vibration, which is connected to the grating placement plate 67 through the guide rails 68 so that the grating placement plate 67 and the sliding block 66 resonate at the same frequency to reduce the reading error of the reading head 3 and improve the stability of the resonance component 6.
[0040] During operation: the transmission plate 61 drives the limiting slider 63 and the push plate 65 to move through the connecting plate 62. The limiting slider 63 converts sliding friction into rolling friction through the roller 64, reducing the friction of the limiting slider 63. The push plate 65 concentrates the force on the sliding block 66 to push the sliding block 66 to move. The sliding block 66 moves along the guide rail 68. When the sliding block 66 vibrates, it will drive the grating placement plate 67 to vibrate together through the guide rail 68. The spring 69 is used to slow down the amplitude.
[0041] like Figure 2 , Figure 5 and Figure 7As shown, the limiting slider 63 has an "L"-shaped cross-section. The "L" shape increases the contact area at the bottom, making the limiting slider 63 more stable. Simultaneously, the "L" shape allows the grating ruler to be installed from multiple directions without the limiting slider 63 detaching from the L-shaped guide rail, improving the stability of the resonant assembly 6. The bottom of the limiting slider 63 has a rectangular structure, with a semi-circular rolling groove 631. The semi-circular rolling groove 631 engages with the roller 64, reducing the gap between the limiting slider 63 and the roller 64, thereby reducing the vibration of the resonant assembly 6. The semi-circular rolling groove 631 extends through the bottom of the limiting slider 63. The roller 64... The limiting slider 63 is slidably mounted on the inner wall of the semi-circular rolling groove 631. The top of the limiting slider 63 is fixedly mounted on both sides of the connecting plate 62, and the lower part of the limiting slider 63 is slidably mounted on the inner wall of the limiting groove 71. The roller 64 is slidably mounted on the bottom of the limiting groove 71. The limiting slider 63 reduces the lateral offset of the transmission plate 61 through the "L"-shaped structure, improves the smooth operation of the resonance component 6, and the limiting slider 63 changes from sliding friction to rolling friction through the roller 64, reducing the friction of the limiting slider 63. This makes the transmission plate 61 need to overcome less friction, resulting in higher output efficiency of the transmission plate 61 and the ability to provide more force to the push plate 65.
[0042] During operation: The transmission plate 61 drives the limiting slider 63 to move through the connecting plate 62. The limiting slider 63 uses the roller 64 to change the sliding into rolling, which greatly reduces the friction with the limiting groove 71.
[0043] like Figure 2 , Figure 4 and Figure 8As shown, the push plate 65 has an isosceles trapezoidal structure. This structure increases the contact area with the connecting plate 62 and decreases the contact area with the sliding block 66, concentrating the torque on the sliding block 66. This increases the thrust exerted by the push plate 65 on the sliding block 66, preventing continuous vibration due to insufficient thrust during movement and improving the stability of the resonance assembly 6. The short side of the push plate 65 is fixedly mounted on the sliding block 66, and the long side is fixedly mounted on the connecting plate 62, further enhancing the stability of the resonance assembly 6. The push plate 65 has rounded corners on both sides, resulting in smaller gaps when passing through the sealing strip 4, thus reducing the impact of contamination on the resonance assembly 6. The sealing strip 4, made of rubber, is slidably connected to the inner wall of the main scale 7. The sealing strips 4 are paired to prevent contamination of the main scale 7 chamber, which could affect the accuracy of the reading head 3. A rectangular groove 651 is provided in the middle, with rounded corners at both ends. The signal transmission line of the reading head 3 passes through the groove 651 and the sealing strip 4 to connect to the signal transmitter 2, reducing wear on the signal transmission line. The roller 64 rolls in the semi-circular sliding groove 631 to reduce the friction of the limiting slider 63, so that the transmission plate 61 provides more force to the push plate 65. The push plate 65 concentrates the dispersed pushing force, so only a small force is needed to push the slider 66 to move. When the resonant component 6 stops, due to the inertia of the slider 66, there will still be a forward force. The isosceles trapezoidal structure of the push plate 65 distributes the pulling force of the slider 66 to the transmission plate 61, so that the slider 66 needs a larger pulling force to pull the push plate 65, thus making the slider 66 stop faster, reducing the influence of inertia on the slider 66, and making the resonant component 6 more stable.
[0044] During operation: The transmission plate 61 drives the push plate 65 to move through the connecting plate 62. The push plate 65 concentrates the force to push the sliding block 66 to move. During the movement of the push plate 65, it will pass between the rubber sealing strips 4. The push plate 65 uses the rounded corner structure to reduce the friction with the sealing strips 4, and also reduces the gap of the sealing strips 4, thus reducing the contamination of the cavity of the main scale 7.
[0045] like Figure 2 , Figure 3 , Figure 8 , Figure 9 and Figure 10As shown, the sliding block 66 has a rectangular structure. Symmetrical oblique grooves 661 are formed on both sides of the upper part of the sliding block 66. Compared to horizontal or vertical grooves, the oblique grooves 661 are more effective at resisting axial and horizontal offsets. The oblique grooves 661 open upwards, and the diameter of the circular structure at the bottom of the oblique groove 661 is larger than the width of the upper part of the oblique groove 661. The circular structure at the bottom axially fixes the round-headed guide rail 73 within the oblique groove 661, making the sliding block 66 less likely to fall off, thereby improving the stability of the resonant assembly 6. Simultaneously, the circular structure at the bottom of the oblique groove 661 engages with the round-headed guide rail 73, increasing the contact area between the oblique groove 661 and the round-headed guide rail 73, thereby reducing the gap between the round-headed guide rail 73 and the oblique groove 661, significantly reducing the vibration of the resonant assembly 6. A T-shaped groove is formed at the bottom of the sliding block 66. The sliding block 66 has a slidable groove 662 that is slidably connected to the guide rail 68, ensuring that the sliding block 66 can slide axially on the guide rail 68. At the same time, the sliding block 66 is restricted by the guide rail 68 in the vertical direction. A limit groove 663 is opened at the bottom of the sliding block 66, and the reading head 3 is fixedly installed in the limit groove 663. Connecting holes 664 are opened on the front and rear sides of the sliding block 66 and connected to the limit groove 663. The reading head 3 is fixedly installed in the limit groove 663. After long-term wear, the gap between the sliding block 66 and the inclined groove 661 will increase, making the sliding block 66 more prone to vibration. The inclined groove 661 effectively reduces the lateral displacement of the sliding block 66. When the sliding block 66 vibrates up and down, it will drive the guide rail 68 to move, thereby reducing the vibration of the sliding block 66 and allowing the resonance component 6 to work better.
[0046] During operation: The sliding block 66 drives the reading head 3 to move through the bottom limiting groove 663. The sliding block 66 moves along the round head guide rail 73 using the inclined sliding groove 661. When the sliding block 66 vibrates, it drives the guide rail 68 to vibrate together.
[0047] like Figure 3 , Figure 5 , Figure 10 and Figure 11As shown, the grating placement plate 67 has a rectangular structure with a grating groove 673 in the middle. The grating strip 1 is fixedly installed at the bottom of the grating groove 673. The grating groove 673 has a rectangular structure and rounded corners at the top edge to facilitate the installation of the grating strip 1 and prevent damage to the reading head 3 from the edge of the grating groove 673. Multiple sliding holes 672 are symmetrically opened on both sides of the grating placement plate 67. The outer surface of the guide post 75 is slidably installed on the inner wall of the sliding hole 672. The guide post 75 is used to fix the grating placement plate 67 and prevent the grating fixing plate 74 from shifting laterally. At the same time, it ensures that the grating placement plate 67 can only move along the direction of the guide post 75. Multiple retaining spring grooves 671 are symmetrically opened on both sides of the bottom of the grating placement plate 67. The spring 69 is engaged with the inner wall of the retaining spring groove 671. The spring 69 is used to reduce the vibration of the grating placement plate 67 and absorbs the vibration of the sliding block 66 through the guide rail 68, thereby making the operation of the resonance component 6 more stable.
[0048] During operation: When the sliding block 66 vibrates, the guide rail 68 will drive the grating fixing plate 74 to vibrate together. The guide post 75 is slidably installed on the inner wall of the grating placement plate 67. In the horizontal direction, the guide post 75 restricts the vibration of the grating placement plate 67. In the vertical direction, the guide post 75 provides guidance for the vibration of the grating placement plate 67. The vibration of the grating placement plate 67 is also absorbed by the spring 69 at the bottom of the grating placement plate 67, thereby reducing the amplitude of the grating placement plate 67 and making the resonant component 6 more stable.
[0049] like Figure 4 , Figure 9 , Figure 10 and Figure 11As shown, the guide rail 68 consists of two connected T-shaped plates. The cross-section of the guide rail 68 is a double "T" shape. The double "T" shape increases the axial load bearing capacity of the guide rail 68 and reduces the lateral offset of the sliding block 66, making the movement of the sliding block 66 more stable and improving the horizontal sliding stability of the resonant component 6. The two T-shaped plates are arranged alternately, which increases the contact area between the guide rail 68 and the sliding block 66. The upper T-shaped plate is more sensitive to vertical vibration, thereby improving the accuracy of the resonant component 6. The guide rail 68 is symmetrically installed on both sides of the grating placement plate 67. The presence of guide rails 68 on both sides makes the sliding block 66 more stable. The top of the guide rail 68 is tightly fitted with the top of the T-shaped slide groove 662. The "T"-shaped structure of the slide rail ensures that the sliding block 66 does not affect the slide rail when moving horizontally. Since the guide rail 68 is fixedly installed... The grating placement plate 67 is fixed horizontally by the guide post 75 on both sides, making the guide rail 68 more stable in the horizontal direction. However, when the sliding block 66 vibrates, the guide rail 68 restricts the lateral vibration of the sliding block 66, and the cavity of the guide rail 68 can absorb the vibration, reduce the offset of the grating placement plate 67, reduce the wear of the grating placement plate 67, and protect the grating placement plate 67. At the same time, it makes the sliding block 66 more stable and improves the stability of the resonant component 6. When the sliding block 66 vibrates up and down, it will drive the guide rail 68 to vibrate up and down together. Since the guide rail 68 is fixedly connected to the grating placement plate 67, the grating placement plate 67 will also vibrate up and down. The amplitude of the grating placement plate 67 is consistent with the amplitude of the sliding block 66, so that the distance between the reading head 3 and the grating strip 1 on the grating placement plate 67 remains unchanged, thereby making the resonant component 6 more stable.
[0050] During operation: the sliding block 66 reciprocates along the guide rail 68; when the sliding block 66 vibrates during high-speed movement, the guide rail 68 restricts the lateral displacement of the sliding block 66, and the internal cavity of the guide rail 68 absorbs the amplitude. In the vertical direction, the sliding block 66 drives the guide rail 68 to move, which in turn drives the grating placement plate 67 to move.
[0051] like Figure 5As shown, the main scale 7 has a rectangular structure, and the internal cavity of the main scale 7 has a convex shape. By placing the resonant component 6 inside the cavity of the main scale 7, the impact of contamination on the resonant component 6 is minimized. The upper cavity of the convex structure provides space for the movement of the push plate 65, and the lower cavity of the convex structure provides space for the movement of the sliding block 66. Furthermore, the cavity facilitates air circulation within the enclosed space, reducing the impact of air pressure on the resonant component 6 and increasing its stability. Sufficient space must be provided inside the main scale 7 for… The main scale 7 has symmetrically arranged limiting grooves 71 on both sides of the top of the adjustment reading head 3. The main scale 7 has fixed plates 74 on both sides. The fixed plates 74 are rectangular structures with multiple fixing holes 741 arranged in an array on the fixed plates 74. The main scale 7 is fixed by screws through the fixing holes 741. The end caps 5 are fixed at both ends of the main scale 7. The end caps 5 have ventilation holes to reduce the influence of air pressure on the resonance component 6. The end caps 5 can also prevent the sealing strip 4 from slipping off the limiting slider 63, reduce the failure rate of the grating ruler, and thus improve the working efficiency of the resonance component 6.
[0052] During operation: The resonant component 6 drives the signal transmitter 2 and the reading head 3 to slide within the cavity of the main scale 7. The end cap 5 closes both ends of the main scale 7 to prevent the sealing strip 4 and the resonant component 6 from detaching from the main scale 7.
[0053] like Figure 3 , Figure 5 , Figure 10 and Figure 11 As shown, a grating fixing groove 72 is provided at the bottom of the internal cavity of the main scale 7. The grating fixing groove 72 has an inverted "convex" shape. This inverted "convex" shape prevents the grating placement plate 67 and the sliding block 66 from being in the same cavity, thus preventing damage to the grating strip 1 during installation of the sliding block 66, which would affect the reading accuracy of the resonant component 6. It also prevents the grating placement plate 67 from contacting the main scale 7, which would cause oil stains to affect the grating placement plate 67, thereby preventing contamination of the grating strip 1 and improving the accuracy and service life of the resonant component 6. The spring 69 is installed at the bottom of the grating fixing groove 72. Spring 69 is used to reduce the vertical vibration of grating placement plate 67 and prevent the bottom of grating placement plate 67 from contacting grating fixing groove 72 to reduce wear. Multiple guide posts 75 are symmetrically fixed on both sides of grating fixing groove 72. The outer surface of guide post 75 is slidably connected to the inner wall of grating placement plate 67, thereby restricting the movement direction of grating placement plate 67, so that grating placement plate 67 can only be driven by guide rail 68 to move up and down reciprocatingly. At the same time, guide post 75 reduces the offset of grating placement plate 67 and absorbs the lateral vibration of guide rail 68, thereby improving the stability of resonant component 6.
[0054] like Figure 3 , Figure 5 and Figure 12As shown, multiple round-headed guide rails 73 are arrayed on the upper part of the internal cavity of the main scale 7. When the sliding block 66 slides on the round-headed guide rails 73, the gap between the round-headed guide rails 73 prevents the sliding block 66 from getting stuck during the sliding process. The gap between the round-headed guide rails 73 also allows the vibration of the sliding block 66 to be released, and makes the vertical vibration effect of the sliding block 66 greater than the lateral vibration effect, thereby reducing the effect of lateral vibration on the sliding block 66 and giving the resonant assembly 6 higher resistance to lateral vibration. The round-headed guide rails 73 can engage with the inclined slide groove 661 to reduce the lateral offset of the sliding block 66. The round-headed structure also prevents the sliding block 66 from slipping out of the round-headed guide rails 73. The round-headed guide rails 73 are installed symmetrically in an inverted "eight" shape. This inverted "eight" symmetrical installation makes the vibration of the sliding block 66 more biased towards vertical vibration, thus making the main vibration of the resonant assembly 6 vertical vibration, which makes the operation of the resonant assembly 6 more stable. Furthermore, the included angle between the round-headed guide rails 73 is 90°. When the sliding block 66 shifts laterally, it generates two forces of the same direction but different directions on the round-headed guide rail 73. One round-headed guide rail 73 generates a pulling force, and the other generates a pushing force, thereby reducing the lateral shift of the sliding block 66. The anti-shifting effect of the round-headed guide rail 73 is best when the included angle between them is 90°, making the resonant assembly 6 more stable. A fixing rod 76 is installed on the upper surface of the round-headed guide rail 73, and the fixing plate 76 and The pressure plate 77 is pin-connected and slidably connected to the lever 78. When the sliding block 66 slides on the round-headed guide rail 73, the pressure plate 77 moves through the fixing plate 76 fixed to the upper end face of the round-headed guide rail 73. The pressure plate 77 pushes the lever 78, causing one end of the lever 78 to lift up. The spring at the bottom of the grating placement plate 67 absorbs the vibration, making the round-headed guide rail 73 more stable and the sliding block 66 slides more smoothly, thereby improving the stability of the resonant component 6.
[0055] During operation, the machine tool drives the transmission plate 61 to move along the main scale 7. The transmission plate 61 drives the signal transmitter 2 to move. Simultaneously, the transmission plate 61 drives the limiting slider 63 and the push plate 65 to move via the connecting plate 62. The limiting slider 63 changes from sliding to rolling via the roller 64, reducing the friction of the limiting slider 63 and thus reducing the friction of the transmission plate 61. This allows the transmission plate 61 to provide more force to the push plate 65. The isosceles trapezoidal structure of the push plate 65 concentrates the force distributed by the transmission plate 61, resulting in a greater thrust transmitted to the sliding block 66. The push plate 65 pushes the sliding block 66 to move along the main scale 7. The round-headed guide rail 73 constrains the sliding block 66, reducing its lateral offset. The reading head 3 is fixedly installed on the sliding block. On the inner wall of plate 66, grating strip 1 is located directly below reading head 3 and is mounted on grating placement plate 67. Guide rail 68 is fixedly mounted on both sides of grating placement plate 67. Sliding block 66 is slidably connected to guide rail 68. Sliding block 66 moves horizontally along guide rail 68. When sliding block 66 vibrates, it drives grating placement plate 67 to resonate at the same frequency through guide rail 68, making the amplitude between grating placement plate 67 and reading head 3 the same. At the same time, it keeps the distance between grating strip 1 and reading head 3 constant, making reading head 3 more stable and reading more accurate. The reading signal is transmitted to signal transmitter 2 through reading head 3, and signal transmitter 2 transmits the reading signal, thereby adjusting the machine tool feed distance and making the instrument more precise.
[0056] The technical features disclosed above are not limited to combinations of those already disclosed with other features. Those skilled in the art can also make other combinations of these technical features according to the purpose of this disclosure, in order to achieve the objectives of this disclosure. Various modifications to this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be given the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1. A stable grating ruler, comprising a grating strip (1), a signal transmitter (2), a reading head (3), a sealing strip (4), and an end cap (5); wherein the grating strip (1) is mounted on the outer surface of a grating placement plate (67), the grating strip (1) is located below the reading head (3), the signal transmitter (2) is mounted on a transmission plate (61), and the signal transmitter (2) is connected to the reading head (3); characterized in that, It also includes a resonance component (6) and a main scale (7); the main scale (7) has a resonance component (6) installed in its internal cavity; when the reading head (3) vibrates, the resonance component (6) drives the grating strip (1) to vibrate together, so that the distance between the grating strip (1) and the reading head (3) remains consistent, thereby making the grating scale more stable.
2. The stable grating ruler according to claim 1, characterized in that: The resonant assembly (6) includes a transmission plate (61), a connecting plate (62), a limiting slider (63), a roller (64), a push plate (65), a sliding block (66), a grating placement plate (67), a guide rail (68), and a spring (69). The transmission plate (61) is fixedly installed on the upper part of the connecting plate (62). The connecting plate (62) is fixedly installed with the limiting slider (63) and the push plate (65). The push plate (65) is fixedly installed with the sliding block (66). The sliding block (66) is slidably connected with the guide rail (68). The guide rail (68) is fixedly installed on both sides of the grating placement plate (67). The bottom of the grating placement plate (67) is engaged with one end of the spring (69). The other end of the spring (69) is connected to the bottom of the grating fixing groove (72).
3. A stable grating ruler according to claim 2, characterized in that: The top of the limiting slider (63) is fixedly connected to both sides of the connecting plate (62). The bottom of the limiting slider (63) is provided with a plurality of semi-circular rolling grooves (631). The semi-circular rolling grooves (631) penetrate the bottom of the limiting slider (63). The rollers (64) are slidably installed on the inner wall of the semi-circular rolling grooves (631). The lower part of the limiting slider (63) is slidably installed on the inner wall of the rolling groove (71). The rollers (64) are slidably installed on the bottom of the rolling groove (71).
4. A stable grating ruler according to claim 3, characterized in that: The push plate (65) is an isosceles trapezoidal structure. The connecting plate (62) is fixedly connected to the long side of the push plate (65). The short side of the push plate (65) is fixedly installed on the sliding block (66). A groove (651) is provided in the middle of the push plate.
5. A stable grating ruler according to claim 4, characterized in that: The upper part of the sliding block (66) is symmetrically provided with inclined grooves (661) on both sides. The inclined grooves (661) open upwards. The diameter of the circular structure at the bottom of the inclined grooves (661) is greater than the width of the upper part of the inclined grooves (661). The bottom of the sliding block (66) is provided with guide grooves (662) on both sides. The bottom of the sliding block (66) is provided with a limiting groove (663). The front and rear sides of the sliding block (66) are provided with connecting holes (664) and connected to the limiting grooves (663).
6. A stable grating ruler according to claim 5, characterized in that: The grating placement plate (67) has multiple symmetrically arranged spring clip grooves (671) on both sides of its bottom. The spring (69) is engaged with the inner wall of the spring clip groove (671). The grating placement plate (67) has multiple symmetrically arranged sliding holes (672) on both sides. The inner wall of the sliding hole (672) is slidably connected to the outer surface of the guide post (75). The grating placement plate (67) has a grating groove (673) in the middle.
7. A stable grating ruler according to claim 6, characterized in that: The guide rail (68) consists of two connected T-shaped plates, which are arranged alternately. The guide rail (68) is fixedly installed on both sides of the grating placement plate (67), and the inner wall of the guide groove (662) is slidably connected to the guide rail (68).
8. A stable grating ruler according to claim 1, characterized in that: The main scale (7) has a cavity inside, and the cavity inside the main scale (7) has enough space to adjust the reading head (3). The top of the main scale (7) has symmetrical rolling grooves (71) on both sides. The main scale (7) has fixing plates (74) on both sides, and multiple fixing holes (741) are arrayed on the fixing plates (74).
9. A stable grating ruler according to claim 8, characterized in that: The bottom of the cavity inside the main scale (7) is provided with a grating fixing groove (72), which is an inverted "convex" shaped structure. The spring (69) is installed at the bottom of the grating fixing groove (72), and multiple guide posts (75) are symmetrically fixed on both sides of the grating fixing groove (72).
10. A stable grating ruler according to claim 9, characterized in that: Multiple round-headed guide rails (73) are arranged in an array on the upper part of the internal cavity of the main scale (7). The round-headed guide rails (73) do not contact each other, and the included angle between the round-headed guide rails (73) is 90°. A fixing rod (76) is installed on the upper end face of the round-headed guide rail. The fixing rod (76) is pin connected to the pressure rod (77), and the pressure rod (77) is pin connected to the lever (78).