A linear encoder fixture for testing and calibration
By designing a modular linear encoder fixture, using the coordination of the sliding table guide rail and the sliding table and the fixing design of the encoder fixture, the problems of cumbersome and unstable encoder testing and calibration tools in the prior art are solved, and stable and precise testing is achieved for adapting to encoders of different models.
Patent Information
- Application Number
- CN202420581101.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-03-25
AI Technical Summary
Existing encoder testing and calibration solutions require the design of separate fixtures for different models of encoders, which makes the tools cumbersome and difficult to ensure the stability and accuracy of the test.
A linear encoder fixture for testing and calibration is designed, including a fixture base, a sliding table portion and a fixture portion. The sliding table part cooperates with the sliding table through the sliding table guide rail to achieve stable sliding of the scale; the fixture part fixes the encoder reader head through the encoder fixture and the encoder bracket to simplify the assembly steps and ensure a stable gap between the reading head and the scale.
The fixture is adapted to different encoder housing models through modular design to ensure the stability and consistency of the test, simplifying the testing and correction process of the encoder reader and improving the test accuracy.
Smart Images
Figure CN222748034U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of encoder detection equipment, and in particular relates to a linear encoder jig for testing and calibrating. Background Art
[0002] As an indispensable part of modern motion control, encoders come in many types. Encoders are usually divided into grating encoders and magnetic grating encoders. Grating encoders are further divided into incremental encoders and absolute encoders. These encoders have different shell sizes due to different design schemes.
[0003] Existing encoder testing and correction solutions:
[0004] Solution 1: According to the different sizes of the housing and the different distance requirements between the encoder reader and the scale, we specially design and manufacture slide rail grooves of different sizes, and we need to make scale inner grooves of different depths according to different scale spacings. When using, stick the scale into the scale inner groove, and then put the reader into the slide rail groove and slide it back and forth.
[0005] Solution 2: Assemble the encoder reader onto the linear motor module for testing and calibration.
[0006] Solution 3: Fix the encoder reader and use a rotary motor to drive the code disc for testing and calibration.
[0007] Disadvantages of existing solutions:
[0008] Solution 1: Disadvantages of making different groove fixtures for each encoder reader:
[0009] It is necessary to design a fixture for each different type of encoder reader, which increases a lot of costs. In addition, the groove design requires manual pressing of the reader to slide back and forth for testing. During the test, the gap, inclination and center offset between the encoder reader and the scale cannot be guaranteed to be stable.
[0010] Solution 2: Disadvantages of using linear motor module testing:
[0011] Due to the structure of the linear motor module, assembling the encoder reader is too complicated and the test accuracy cannot be guaranteed. It is not suitable for multiple tests and calibrations on the linear motor module.
[0012] Solution 3: Disadvantages of using rotating motor module testing:
[0013] It cannot be used for testing and calibration of linear encoders.
[0014] In summary, different encoder heads have different shell sizes during testing and calibration, and different encoder heads have different gaps with the scale. Different, separate jigs are required, which not only makes the tools complicated, but also easily causes process errors during production and calibration. At the same time, the old encoder jig cannot adjust the position of the encoder head during testing, which can easily lead to inaccurate or even completely wrong test results. Therefore, it is urgent to build a stable and adjustable encoder jig. Utility Model Content
[0015] The utility model aims to solve the problems of the prior art and provides a linear encoder jig for testing and calibrating.
[0016] In order to solve the technical problem, the technical solution of the utility model is: a linear encoder jig for testing and calibration, comprising a jig base, a slide part and a fixture part;
[0017] The slide part includes a slide rail, a slide and a limit iron block. The slide rail is fixed at the middle position of the fixture base along the length direction of the fixture base. Smooth slide rails are engraved on both sides of the slide rail. The slide is arranged at the top of the slide rail. There are two limit iron blocks. The two limit iron blocks are fixed on both sides of the lower end face of the slide. The inner side of the limit iron block is provided with an inner buckle that fits with the smooth slide rail, so that the slide slides smoothly on the slide rail. The upper end face of the slide is provided with a groove for placing a scale.
[0018] The fixture part includes a fixture base, an encoder fixture and an encoder bracket. The fixture base and the encoder bracket are respectively fixed on both sides of the slide rail. The connecting line of the fixture base and the encoder bracket is perpendicular to the straight line where the length direction of the slide rail is located. The encoder fixture is fixed to the upper end surface of the fixture base. A mounting plug is provided on a side of the encoder bracket close to the encoder fixture. The through hole on the encoder head is sleeved on the mounting plug. The encoder head is pressed by one end of the encoder fixture close to the encoder bracket so that the encoder head is located at the top of the groove where the scale is placed.
[0019] Preferably, the slide part also includes two limit screws, and the two limit screws are respectively arranged on the same side of the two ends of the slide rail, and the two limit screws and one of the limit iron blocks are in the same straight line.
[0020] Preferably, the slide rail is fixed to the fixture base by a plurality of screws, and the limiting iron block is fixed to one side of the lower end surface of the slide by four screws.
[0021] Preferably, the fixture base is provided with a screw hole, which is a rectangular hole, and the screw passes through the screw hole on the fixture base to be fixedly connected to the fixture base.
[0022] Preferably, the encoder fixture includes a push rod, a connecting piece, a sliding rod and a support piece. The support piece is fixed to the upper end surface of the fixture base. The bottom of the push rod is hinged to the upper end surface of the fixture base through a hinge. One end of the connecting piece is hinged to the middle of the push rod, and the other end of the connecting piece is hinged to one end of the sliding rod. The other end of the sliding rod passes through the supporting hole at the top of the support piece to press the encoder reader.
[0023] Preferably, the connecting member is arc-shaped.
[0024] Preferably, one end of the slide rod that presses the encoder reader is sleeved with a rubber sleeve.
[0025] Compared with the prior art, the advantages of the utility model are:
[0026] (1) The utility model discloses a linear encoder jig for testing and calibration, wherein the encoder jig uses an encoder clamp and an encoder bracket to fix the encoder head, and adopts a slide rail and a slide to cooperate so that the scale installed in the groove on the top of the slide can slide back and forth under the encoder head, thereby realizing the testing and calibration of the encoder;
[0027] (2) The utility model divides the linear encoder fixture into modular designs, namely the fixture base, the fixture part and the slide part. The position and height of the fixture and the slide are adjusted through the detachable design, so as to achieve the purpose of adapting to different encoder housing models and sizes. The addition of limit screws on both sides of the slide also ensures the stability and consistency of the test process, thereby ensuring the stability of the test;
[0028] (3) The utility model uses an encoder fixture to fix the encoder head, which can greatly simplify the assembly steps during the encoder head test and calibration. The design of the slide rail of the slide table driving the scale to slide back and forth also ensures that the gap and inclination angle between the encoder head and the scale and the center offset are sufficiently stable;
[0029] (4) The encoder fixture of the utility model has a simple structure, is easy to test, and is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 , a stereoscopic diagram of a linear encoder jig for testing and calibration according to the utility model;
[0031] Figure 2 , a front view of a linear encoder jig for testing and calibration according to the utility model;
[0032] Figure 3 , a side view of a linear encoder jig for testing and calibration according to the utility model.
[0033] Description of reference numerals:
[0034] 1. Fixture base, 2. Slide rail, 3. Slide, 4. Fixture base, 5. Encoder fixture, 6. Encoder bracket, 7. Limit screw, 8. Limit iron block, 9. Encoder reader;
[0035] 3-1. Groove; 4-1. Screw hole;
[0036] 5-1. Push rod, 5-2. Connecting member, 5-3. Sliding rod, 5-4. Support member;
[0037] 5-4-1. Support hole;
[0038] 6-1. Install the plug. DETAILED DESCRIPTION
[0039] The following describes the specific implementation of the utility model in conjunction with embodiments:
[0040] It should be noted that the structures, proportions, sizes, etc. shown in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.
[0041] Example 1
[0042] like Figures 1 to 3 As shown, the utility model discloses a linear encoder jig for testing and calibration, comprising a jig base 1, a slide part and a clamp part;
[0043] The slide part includes a slide rail 2, a slide 3 and a limiting iron block 8. The slide rail 2 is fixed at the middle position of the fixture base 1 along the length direction of the fixture base 1. Smooth slide rails are engraved on both sides of the slide rail 2. The slide 3 is arranged on the top of the slide rail 2. There are two limiting iron blocks 8. The two limiting iron blocks 8 are fixed on both sides of the lower end surface of the slide 3. The inner side of the limiting iron block 8 is provided with an inner buckle that fits with the smooth slide rail, so that the slide 3 can slide smoothly on the slide rail 2. The upper end surface of the slide 3 is provided with a groove 3-1 for placing a scale.
[0044] The fixture part includes a fixture base 4, an encoder fixture 5 and an encoder bracket 6. The fixture base 4 and the encoder bracket 6 are respectively fixed on both sides of the slide rail 2. The connecting line of the fixture base 4 and the encoder bracket 6 is perpendicular to the straight line where the length direction of the slide rail 2 is located. The encoder fixture 5 is fixed to the upper end surface of the fixture base 4. A mounting plug 6-1 is provided on a side of the encoder bracket 6 close to the encoder fixture 5. The through hole 9-1 on the encoder head 9 is sleeved on the mounting plug 6-1. The encoder fixture 5 presses the encoder head 9 at one end close to the encoder bracket 6, so that the encoder head 9 is at the top of the groove 3-1 where the scale is placed.
[0045] Example 2
[0046] like Figure 1 , 2 As shown, preferably, the slide part also includes a limit screw 7, there are two limit screws 7, the two limit screws 7 are respectively arranged on the same side at both ends of the slide rail 2, and the two limit screws 7 and one of the limit iron blocks 8 are in the same straight line.
[0047] like Figure 1 , 2 As shown, preferably, the slide rail 2 is fixed to the fixture base 1 by a plurality of screws, and the limiting iron block 8 is fixed to one side of the lower end surface of the slide 3 by four screws.
[0048] The slide rail 2 is arranged in the middle of the fixture base 1, and the fixture base 1 and the slide rail 2 are fixed with a plurality of screws. A smooth groove rail is arranged on the side of the slide rail 2, and two limit iron blocks 8 are arranged under the slide 3, which are respectively fixed under the slide 3 by four screws. When in use, the groove of the slide rail 2 will clamp the inner side of the two limit iron blocks 8. This design in which the sliding slide 3 drives the scale to slide back and forth during testing and calibration ensures the stability of the gap between the scale and the encoder reading head, the inclination angle and the center offset.
[0049] The groove 3-1 design above the slide 3 also greatly simplifies the operation of installing the scale. At the same time, two limit screws 7 are provided at both ends of the slide rail 2 to prevent the slide 3 from flying out during testing and calibration, while also ensuring the stability and consistency of the test process of the slide 3.
[0050] like Figure 1 As shown, preferably, the fixture base 4 is provided with a screw hole 4 - 1 , which is a rectangular hole. The screw passes through the screw hole 4 - 1 on the fixture base 4 to be fixedly connected to the fixture base 1 .
[0051] The screw hole 4 - 1 of the clamp base 4 is designed as a rectangular hole, and the gap between the encoder clamp 5 and the encoder reader 9 can be roughly controlled by adjusting the front and back of the fixing screw of the clamp base 4 .
[0052] Example 3
[0053] like Figure 3 As shown, preferably, the encoder fixture 5 includes a push rod 5-1, a connecting member 5-2, a sliding rod 5-3 and a supporting member 5-4, the supporting member 5-4 is fixed to the upper end surface of the fixture base 4, the bottom of the push rod 5-1 is hinged to the upper end surface of the fixture base 4 through a hinge, one end of the connecting member 5-2 is hinged to the middle part of the push rod 5-1, the other end of the connecting member 5-2 is hinged to one end of the sliding rod 5-3, and the other end of the sliding rod 5-3 passes through the supporting hole 5-4-1 at the top of the supporting member 5-4 to press the encoder reader 9.
[0054] The encoder fixture 5 is fixed to the fixture base 4 by screws, and gaskets of different heights can be inserted between the lower end surface of the encoder bracket 6 and the upper end surface of the fixture base 1 to change the distance between the encoder reading head 9 and the scale on the slide 3;
[0055] like Figure 1 , 3 As shown, preferably, the connecting member 5-2 is arc-shaped.
[0056] Preferably, one end of the slide rod 5 - 3 that presses the encoder reader 9 is provided with a rubber sleeve.
[0057] The encoder bracket 6 is designed with two mounting plugs 6-1 which are slightly smaller than the through holes of the encoder head 9 housing. The encoder head can be placed on the encoder bracket 6 through the mounting plugs 6-1. After placement, the push rod 5-1 on the encoder fixture 5 is pushed to drive the slide rod 5-3 to move toward the encoder bracket 6 to clamp the encoder head 9. This design not only greatly simplifies the tedious process of installing the encoder head 9, but also allows encoder heads 9 of different sizes to be placed by adjusting the slide rod 5-3 of the encoder fixture 5.
[0058] The working principle of the utility model is as follows:
[0059] like Figures 1 to 3As shown, the utility model discloses a linear encoder jig for testing and calibration. The structure of the encoder jig is simple, and it is generally composed of several parts: a jig base 1, a fixture part and a slide part; the slide part includes a slide rail 2, a slide 3, a limit iron block 8 and a limit screw 7. The slide rail 2 and the jig base 1 are connected together by a plurality of screws. Smooth slide rails are engraved on both sides of the slide rail 2. Two groups of four screws are used to lock two limit iron blocks 8 under the slide 3. The inner side of the limit iron block 8 is designed with an inner buckle that fits the smooth slide rail. The slide 3 buckles the smooth slide rails on both sides of the slide rail 2 through the two limit iron blocks 8. The slide 3 can slide smoothly on the guide rail 2. A limit screw 7 is set above the slide 3. There is a groove 3-1 for placing the scale; the fixture part includes an encoder bracket 6, an encoder fixture 5 and a fixture base 4. The fixture base 4 and the encoder bracket 6 are respectively fixed to the screw holes on both sides of the slide rail 2 with screws. The fixing screw holes of the fixture base 4 are designed as rectangular holes. A mounting plug 6-1 is provided on the encoder bracket 6. The through hole 9-1 on the encoder reader 9 is sleeved on the mounting plug 6-1. At the same time, the encoder fixture 5 can use a slide bar 5-3 to press the encoder reader 9, so that encoders with different shell sizes can be placed on the encoder bracket 6 and fixed. At this time, the encoder reader 9 is located on the top of the scale, and the slide 3 is used to slide the scale to achieve the test and correction of the encoder.
[0060] The utility model discloses a linear encoder jig for testing and calibrating. The encoder jig uses an encoder clamp and an encoder bracket to fix an encoder reading head, and adopts a slide rail and a slide to cooperate with each other, so that a scale installed in a groove on the top of the slide can slide back and forth under the encoder reading head, thereby realizing the testing and calibration of the encoder.
[0061] The utility model divides the linear encoder fixture into modular designs, namely the fixture base, the fixture part and the slide part. The position and height of the fixture and the slide are adjusted through the detachable design, so as to achieve the purpose of adapting to different encoder housing models and sizes. The addition of limit screws on both sides of the slide also ensures the stability and consistency of the test process, thereby ensuring the stability of the test.
[0062] The utility model fixes the encoder head by the encoder fixture, which can greatly simplify the assembly steps during the encoder head testing and calibration. The design of the slide rail of the slide table driving the scale to slide back and forth also ensures that the gap and inclination angle as well as the center offset between the encoder head and the scale are sufficiently stable.
[0063] The encoder fixture of the utility model has a simple structure, is convenient to test, and is stable and reliable.
[0064] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.
[0065] Many other changes and modifications can be made without departing from the concept and scope of the utility model. It should be understood that the utility model is not limited to a specific embodiment, and the scope of the utility model is defined by the appended claims.
Claims
1. A linear encoder jig for testing and calibration, characterized in that: It includes a fixture base (1), a slide part and a clamp part; The slide part comprises a slide rail (2), a slide (3) and a limiting iron block (8), wherein the slide rail (2) is fixed at the middle position of the fixture base (1) along the length direction of the fixture base (1), smooth slide rails are engraved on both sides of the slide rail (2), the slide (3) is arranged at the top of the slide rail (2), there are two limiting iron blocks (8), the two limiting iron blocks (8) are fixed on both sides of the lower end surface of the slide (3), the inner side of the limiting iron block (8) is provided with an inner buckle that fits with the smooth slide rail, so that the slide (3) slides smoothly on the slide rail (2), and the upper end surface of the slide (3) is provided with a groove (3-1) for placing a scale; The fixture part comprises a fixture base (4), an encoder fixture (5) and an encoder bracket (6), the fixture base (4) and the encoder bracket (6) are respectively fixed on both sides of the slide rail (2), the connecting line of the fixture base (4) and the encoder bracket (6) is perpendicular to the straight line of the length direction of the slide rail (2), the encoder fixture (5) is fixed to the upper end surface of the fixture base (4), a side surface of the encoder bracket (6) close to the encoder fixture (5) is provided with a mounting plug (6-1), the through hole (9-1) on the encoder head (9) is sleeved on the mounting plug (6-1), and the encoder fixture (5) presses the encoder head (9) at one end close to the encoder bracket (6), so that the encoder head (9) is located at the top of the groove (3-1) for placing the scale.
2. A linear encoder jig for testing and calibration according to claim 1, characterized in that: The slide part also includes two limit screws (7), and the two limit screws (7) are respectively arranged on the same side of the two ends of the slide rail (2), and the two limit screws (7) and one of the limit iron blocks (8) are on the same straight line.
3. A linear encoder jig for testing and calibration according to claim 1, characterized in that: The slide rail (2) is fixed to the fixture base (1) by means of a plurality of screws, and the limiting iron block (8) is fixed to one side of the lower end surface of the slide (3) by means of four screws.
4. A linear encoder jig for testing and calibration according to claim 1, characterized in that: The fixture base (4) is provided with a screw hole (4-1), the screw hole (4-1) being a rectangular hole, and a screw passes through the screw hole (4-1) on the fixture base (4) to be fixedly connected to the fixture base (1).
5. A linear encoder jig for testing and calibration according to claim 1, characterized in that: The encoder fixture (5) comprises a push rod (5-1), a connecting piece (5-2), a sliding rod (5-3) and a supporting piece (5-4); the supporting piece (5-4) is fixed to the upper end surface of the fixture base (4); the bottom of the push rod (5-1) is hinged to the upper end surface of the fixture base (4) via a hinge; one end of the connecting piece (5-2) is hinged to the middle of the push rod (5-1); the other end of the connecting piece (5-2) is hinged to one end of the sliding rod (5-3); the other end of the sliding rod (5-3) passes through a supporting hole (5-4-1) at the top of the supporting piece (5-4) to press the encoder reader (9).
6. A linear encoder jig for testing and calibration according to claim 5, characterized in that: The connecting piece (5-2) is arc-shaped.
7. A linear encoder jig for testing and calibration according to claim 5, characterized in that: One end of the slide bar (5-3) pressing the encoder reader (9) is sleeved with a rubber sleeve.