Heavy torque encoder

Abstract

The invention relates to the technical field of encoders, in particular to a heavy torque encoder which comprises a shaft core, a shaft sleeve, a positioning piece, an encoding body and a push switch body, the shaft core movably penetrates through the shaft sleeve, the positioning piece and the encoding body, the periphery of the shaft core is sleeved with a movable arm, and the periphery of the shaft core is sleeved with a positioning piece. A positioning convex body is arranged on the lower end face of the positioning piece, a plurality of positioning grooves are annularly formed in the positioning piece at equal intervals, and the periphery of the shaft core is further movably sleeved with an elastic piece. The structure is novel, the clear positioning touch sense is generated, the elastic piece arranged on the shaft core in a sleeving mode is connected with the positioning piece and the shaft sleeve, elastic potential energy is stored, rotating resistance and the automatic reset function are provided during rotating operation, force is generated on the positioning piece, the effect of a positioning point under the cooperation of the positioning protrusion and the positioning groove is better, and the positioning effect is better. Through the cooperation among the elastic piece, the positioning piece and the positioning piece, the whole encoder has a heavy torque effect.

Description

Technical Field

[0001] The present invention relates to the technical field of encoders, in particular to a heavy torque encoder. Background Art

[0002] Traditional rotary encoders have the following main technical defects: structural complexity. Most products use a separate design of rotary encoding and push switch, resulting in a large number of components and large axial dimensions. In the positioning structure of traditional encoders, long-term friction between the plastic claw and the metal cam can cause positioning ambiguity. In addition, there is an operating axis deviation between the separate design of the push switch and the rotary encoder, resulting in obvious differences in the pressing feel at different angles. Summary of the Invention

[0003] In response to the problems of the prior art, the present invention provides a heavy-torque encoder with a novel structure and a clear positioning tactile feel. The elastic part sleeved on the shaft core connects the positioning part and the shaft sleeve, stores elastic potential energy during rotation operation, provides rotational resistance and automatic reset function, and generates force on the positioning part, so that the positioning point effect under the cooperation of the positioning convex body and the positioning groove is better. The cooperation between the elastic part, the positioning part and the positioning plate makes the encoder of the present invention have the effect of heavy torque as a whole; dual functions are integrated, and the same shaft core realizes the functions of rotary encoding and push switch at the same time, which simplifies the complexity brought by the separate structure in the traditional design.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides a heavy torque encoder, which includes a shaft core and a shaft sleeve, a positioning plate, an encoding body and a push switch body connected in sequence. The shaft core is movably inserted into the shaft sleeve, the positioning plate and the encoding body. The outer periphery of the shaft core is sleeved with a movable arm, which is movably arranged on the encoding body. The movable arm is located between the encoding body and the positioning plate. The outer periphery of the shaft core is sleeved with a positioning member, which is movably arranged on the positioning plate. The lower end face of the positioning member is provided with a positioning convex body. The positioning plate is provided with a plurality of positioning grooves at equal intervals that cooperate and abut against the positioning convex body. The outer periphery of the shaft core is also movably sleeved with an elastic member, which is located between the positioning member and the shaft sleeve. The two ends of the elastic member are respectively connected to the positioning member and the shaft sleeve.

[0006] Wherein, the elastic member is a spring.

[0007] A through groove is provided through the middle of the shaft sleeve, the shaft core is provided in the through groove, and a waterproof ring is provided at one end of the outer side of the through groove.

[0008] Wherein, a pot piece is provided on the push switch body, and the lower end of the shaft core abuts against the pot piece.

[0009] Wherein, an isolation plate is provided between the push switch body and the encoding body.

[0010] There are two positioning protrusions, which are respectively arranged on both sides of the lower end surface of the positioning member.

[0011] Wherein, the two positioning protrusions are symmetrically arranged about the center of the positioning member.

[0012] Wherein, the positioning piece is made of stainless steel powder.

[0013] Beneficial effects of the present invention:

[0014] The invention has a novel structure. The push-type encoder realizes precise indexing and positioning through the meshing cooperation of the positioning convex body and the positioning groove. The positioning convex body at the lower end of the positioning member forms a mechanical meshing with a plurality of positioning grooves arranged at equal intervals on the positioning plate. When the shaft core rotates, the positioning convex body switches between different positioning grooves, producing a clear positioning tactile feeling; furthermore, the elastic member sleeved on the shaft core connects the positioning member and the shaft sleeve, stores elastic potential energy during the rotation operation, provides rotation resistance and automatic reset function, and generates force on the positioning member, so that the positioning point effect under the cooperation of the positioning convex body and the positioning groove is better, the elastic member 10 and the positioning member 7 And the cooperation between the positioning piece 3 makes the encoder of the present invention have the effect of heavy torque as a whole; wherein, the movable arm (which can be a brush) serves as an intermediate transmission element, which transmits the rotational motion of the shaft core to the encoder body, and isolates the influence of the axial motion on the encoding accuracy; at the same time, the embodiment of the present application integrates the pressing function design, and the lower end of the shaft core directly abuts the pot piece of the press switch body to realize direct pressure transmission without intermediate transmission, thereby reducing energy loss and component wear; the present invention integrates dual functions, and the same shaft core realizes the functions of rotary encoding and press switch at the same time, which simplifies the complexity brought by the separate structure in the traditional design. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural exploded diagram of a heavy torque encoder of the present invention.

[0016] exist Figure 1 Reference numerals in the figures include:

[0017] 1. Shaft core; 2. Shaft sleeve; 3. Positioning piece; 4. Encoding body; 5. Push switch body; 6. Moving arm; 7. Positioning piece; 8. Positioning protrusion; 9. Positioning groove; 10. Elastic piece; 11. Through groove; 12. Waterproof ring; 13. Pot piece; 14. Isolation plate. DETAILED DESCRIPTION

[0018] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings. The contents mentioned in the embodiments are not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0019] This application implements, for example Figure 1 The heavy torque encoder shown in the figure includes a shaft core 1 and a shaft sleeve 2, a positioning piece 3, an encoding body 4 and a press switch body 5 connected in sequence. The shaft core 1 is movably arranged on the shaft sleeve 2, the positioning piece 3 and the encoding body 4. The outer periphery of the shaft core 1 is provided with a movable arm 6, and the movable arm 6 is movably arranged on the encoding body 4. The movable arm 6 is located between the encoding body 4 and the positioning piece 3. The outer periphery of the shaft core 1 is provided with a positioning piece 7, and the positioning piece 7 is movably arranged on the positioning piece 3. The positioning piece The lower end surface of 7 is provided with a positioning protrusion 8, and the positioning piece 3 is provided with a plurality of positioning grooves 9 that cooperate and abut against the positioning protrusion 8 at equal intervals. The outer periphery of the shaft core 1 is also movably sleeved with an elastic member 10, and the elastic member 10 is located between the positioning member 7 and the shaft sleeve 2, and the two ends of the elastic member 10 are respectively connected to the positioning member 7 and the shaft sleeve 2; wherein, the elastic member 10 is a spring; wherein, a pot piece 13 is provided on the push switch body 5, and the lower end of the shaft core 1 abuts against the pot piece 13.

[0020] Specifically, the push-type encoder of the present invention realizes precise indexing and positioning through the meshing cooperation of the positioning convex body 8 and the positioning groove 9. The positioning convex body 8 at the lower end of the positioning member 7 forms a mechanical meshing with a plurality of positioning grooves 9 arranged at equal intervals on the positioning sheet 3. When the shaft core 1 rotates, the positioning convex body 8 switches between different positioning grooves 9, producing a clear positioning tactile feeling; further, the elastic member 10 sleeved on the shaft core 1 connects the positioning member 7 and the shaft sleeve 2, stores elastic potential energy during the rotation operation, provides rotation resistance and automatic reset function, and generates force on the positioning member 7, so that the positioning point effect under the cooperation of the positioning convex body 8 and the positioning groove 9 is better, and the elastic member 10, The cooperation between the positioning member 7 and the positioning plate 3 enables the encoder of the present invention to have a heavy torque effect as a whole; wherein, the movable arm 6 (which can be a brush) serves as an intermediate transmission element, transmitting the rotational motion of the shaft core 1 to the encoder body 4, while isolating the influence of the axial motion on the encoding accuracy; at the same time, the embodiment of the present application integrates a press function design, and the lower end of the shaft core 1 directly abuts against the pot piece 13 of the press switch body 5, realizing direct pressure transmission without intermediate transmission, reducing energy loss and component wear; the present invention integrates dual functions, and the same shaft core 1 realizes the rotary encoding and press switch functions at the same time, simplifying the complexity brought by the separate structure in the traditional design.

[0021] In the embodiment of the present application, the touch is optimized, and the 180g standard load of the pot piece 13 provides a clear perception of the pressing stage, forming a coordinated operating experience with the mechanical feedback of the rotational positioning.

[0022] In the embodiment of the present application, a through groove 11 is provided in the middle of the sleeve 2, the shaft core 1 is provided in the through groove 11, and a waterproof ring 12 is provided at one end outside the through groove 11. Specifically, the waterproof ring 12 plays a waterproof role.

[0023] In the embodiment of the present application, an isolation plate 14 is provided between the push switch body 5 and the encoder body 4. Specifically, the isolation plate 14 plays the role of mechanical isolation and electrical isolation, avoiding interference between the push switch body 5 and the encoder body 4, and ensuring a reliable structure.

[0024] In the embodiment of the present application, two positioning protrusions 8 are provided, one on each side of the lower end surface of the positioning member 7. Furthermore, the two positioning protrusions 8 are symmetrically arranged about the center of the positioning member 7. Specifically, the positioning protrusions 8 match the positioning grooves 9 on the positioning plate 3. The two symmetrical positioning protrusions 8 ensure positioning reliability, are not prone to loosening or displacement, and can improve positioning stability.

[0025] In the embodiment of the present application, the positioning member 7 is made of stainless steel powder; specifically, the metal positioning member 7 also serves as an electromagnetic shielding layer, reducing the impact of external interference on the coding signal and having anti-interference ability; in addition, the positioning member 7 is made of stainless steel powder, has better structural stability, is wear-resistant, and has a longer service life.

[0026] In the embodiment of the present application, the method for making the positioning member 7 from stainless steel powder includes powder preparation, molding, sintering and post-processing; wherein the stainless steel powder preparation process steps are:

[0027] S1. Atomization method: water atomization method: molten stainless steel water flows out through the nozzle leak hole, and is blown and solidified with high-pressure water to obtain stainless steel powder; or gas atomization method: high-pressure nitrogen is used for atomization, and the powder particles are spherical with a loose density of about 4.8g / cm 3 , oxygen content is less than 100×10 -6 Or rotating electrode powder making method: produce spherical stainless steel powder, oxygen content is controlled at (40-70)×10 -6 ;

[0028] S2. Powder processing: Grading treatment, using screens with different mesh sizes for particle size classification; surface treatment, including cleaning, impurity removal, deoxidation and other processes, to improve powder purity; mixing: adding lubricants (such as stearic acid) or other additives as needed;

[0029] S3. Compression molding method: uniaxial pressing, pressure 550-830MPa, mold temperature controlled at 80-120℃; or cold isostatic pressing, carried out at a pressure of 5kPa, can obtain a higher density green compact; or warm pressing, heating to 120-150℃ for pressing, can increase the green compact density and strength;

[0030] S4. Sintering method: hot isostatic pressing, temperature 1050°C, pressure 2kPa, time: 2-4 hours;

[0031] S5. Post-processing method: hot rolling, temperature 1180-1220℃, single-pass deformation 15-20%; cold rolling, total deformation 60-70%, completed in 4-6 passes; intermediate annealing, 830℃×5min, to eliminate work hardening.

[0032] S6. Surface treatment: Wire drawing: 320 mesh abrasive belt, groove depth 6-8μm; mirror polishing, roughness can reach 0.01μm; passivation treatment, nitric acid-based passivation solution concentration 20%-25%.

[0033] Of course, making stainless steel sheet structures using stainless steel powder is a common technology in the field of craft products, but it has never been used in encoders. The embodiment of the present application will apply positioning parts made of stainless steel powder to encoders to improve their wear resistance and structural stability, and further increase the service life of the encoder.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are all within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A heavy torque encoder, characterized in that: The invention comprises an axis core and an axis sleeve, a positioning piece, an encoding body and a push switch body connected in sequence, the axis core being movably arranged on the axis sleeve, the positioning piece and the encoding body, the outer periphery of the axis core being sleeved with a movable arm, the movable arm being movably arranged on the encoding body, the movable arm being located between the encoding body and the positioning piece, the outer periphery of the axis core being sleeved with a positioning piece, the positioning piece being movably arranged on the positioning piece, the lower end face of the positioning piece being provided with a positioning convex body, the positioning piece being provided with a plurality of positioning grooves which cooperate and abut against the positioning convex body at equal intervals, the outer periphery of the axis core being also movably sleeved with an elastic piece, the elastic piece being located between the positioning piece and the axis sleeve, the two ends of the elastic piece being respectively connected with the positioning piece and the axis sleeve.

2. A heavy torque encoder according to claim 1, characterized in that: The elastic member is a spring.

3. A heavy torque encoder according to claim 1, characterized in that: A through groove is provided in the middle of the shaft sleeve, the shaft core is provided in the through groove, and a waterproof ring is provided at one end of the outer side of the through groove.

4. A heavy torque encoder according to claim 1, characterized in that: A pot piece is provided on the push switch body, and the lower end of the shaft core abuts against the pot piece.

5. The heavy torque encoder according to claim 1, characterized in that: An isolation plate is provided between the push switch body and the encoding body.

6. A heavy torque encoder according to claim 1, characterized in that: There are two positioning protrusions, which are respectively arranged on both sides of the lower end surface of the positioning member.

7. The heavy torque encoder according to claim 1, characterized in that: The two positioning protrusions are symmetrically arranged about the center of the positioning member.

8. The heavy torque encoder according to claim 1, characterized in that: The positioning piece is made of stainless steel powder.

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