Elastic support device for a large-diameter steel tape encoder reading head

Abstract

The application discloses a kind of elastic support devices of large-diameter steel tape encoder reading head, including steel tape installation ring;Encoder steel tape is bonded to the outer cylindrical surface of steel tape installation ring;Elastic support box is located at one side of steel tape installation ring;Reading head seat is arranged in elastic support box, and encoder reading head is installed in reading head seat;Elastic support structure is installed in the end of reading head seat away from encoder steel tape;Adjusting mechanism is connected in the top of elastic support box, for adjusting the relative position of encoder reading head and encoder steel tape.The application is for the steel tape encoder installed on large diameter, pre-tightening force is applied using spring, and the design interval between reading head and steel tape is kept using steel ball, which can ensure the measurement accuracy of encoder.In the case of extreme impact such as earthquake, spring structure can buffer the impact force along the radial direction of rotary shaft, and physical collision between reading head and steel tape caused by severe impact can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photoelectric measuring equipment, and particularly relates to an elastic supporting device of a large-diameter steel belt encoder reading head. BACKGROUND

[0002] The rotary shaft system of photoelectric measuring equipment will adopt an encoder to realize the measurement and feedback functions of rotary position, driving motor speed and acceleration. The encoder is mainly composed of a fixed part of a grating code disc, a code channel steel ring or a code channel steel belt and a rotating part of a reading head, and the two maintain a certain design distance D, generally about 1mm. When the fixed part and the rotating part rotate relative to each other, the change of the triggered photoelectric signal generates a reading, realizing the non-contact measurement of angle position, speed and acceleration. Sometimes the fixed part and the rotating part can also be installed in each other. Generally, the grating code disc is used for small-diameter rotary shaft systems below 100mm, such as photoelectric theodolites and telescopes below 1m in caliber. The code channel steel ring is used for medium and small-diameter rotary shaft systems of 100mm to 500mm, such as medium and small-sized photoelectric telescopes of 1m to 2m in caliber. The code channel steel belt is used for medium and large-diameter rotary shaft systems above 500m, such as medium and large-sized photoelectric telescopes above 2m in caliber, large-sized photoelectric telescopes above 5m in caliber and giant photoelectric telescopes above 10m in caliber.

[0003] The grating code disc type encoder generally adopts an integrated structure with internal bearings and a shaft coupling. The code channel steel ring type encoder adopts a split design for the reading head, the steel ring is assembled with a fixed shaft by screws, and the reading head is assembled with a rotating body by screws, both of which belong to rigid support structures. These two kinds of encoders are generally not adjusted again during the equipment installation and adjustment process.

[0004] The code channel steel belt type encoder also adopts a split design for the reading head, the steel belt is pasted on the outer surface or inner surface of a fixed shaft part by adhesive, and the reading head is connected with the rotating part of the equipment through a transition piece with an adjustment structure, both of which maintain a certain design distance D and do not change with the increase of the diameter of the shaft part. However, for large and giant photoelectric telescopes above 5m in caliber, the size of the fixed shaft part and the rotating body part is huge, up to several meters or even tens of meters, and is composed of multiple different metal materials. In the case of environmental temperature change, due to the difference in thermal expansion coefficient, the design distance D between the reading head and the steel belt will change, thereby affecting the reading accuracy of the encoder, even failing to read, and finally leading to abnormal operation, shutdown or accidental fly-off of the equipment. Moreover, the encoder of a large and giant telescope is expensive, and in the case of extreme impact such as earthquake, the large amplitude generated by the large-size equipment may cause the reading head to collide with the steel belt, damaging the reading head and the steel belt of the encoder.

[0005] Based on the above-mentioned technical problems, those skilled in the art urgently need to develop an elastic support device for the reading head of a large-diameter steel strip encoder that can ensure the measurement accuracy of the encoder and provide buffering force in extreme cases. Summary of the Invention

[0006] The purpose of this invention is to provide an elastic support device for a large-diameter steel strip encoder reading head that can ensure the measurement accuracy of the encoder and provide buffering force in extreme cases.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The present invention provides an elastic support device for a large-diameter steel strip encoder reading head, the elastic support device comprising:

[0009] Steel strip mounting ring; and

[0010] The encoder steel strip is bonded to the outer cylindrical surface of the steel strip mounting ring;

[0011] The flexible support box is located on one side of the steel belt mounting ring and forms an internal receiving space;

[0012] A reading head seat is provided in the elastic support box, and an encoder reading head is installed in the reading head seat. The upper and lower ends of the reading head seat form a rolling friction structure with the elastic support box.

[0013] The upper and lower frame surfaces of the reading head base near the encoder steel belt side are cylindrical surfaces coaxial with the steel belt mounting ring, and are provided with an array of blind holes radially along the rotation axis. Two sets of first steel balls are built into the blind holes to contact the non-steel belt area of ​​the steel belt mounting ring.

[0014] The elastic support device also includes:

[0015] An elastic support structure installed at the end of the reading head base away from the encoder steel belt; and

[0016] An adjustment mechanism connected to the top of the elastic support housing is used to adjust the relative position of the encoder reading head and the encoder steel belt.

[0017] Furthermore, the elastic support box includes a sliding bottom plate; and

[0018] A top cover installed on the upper end of the slide base plate;

[0019] The end cover plate, which is attached to the bottom plate of the slide groove and the top cover on the side away from the encoder steel belt by screws, has a threaded hole in the middle for engagement with the elastic support structure.

[0020] Furthermore, the upper and lower surfaces of the reading head seat are each provided with at least three blind holes, and a second steel ball is provided in each blind hole. The upper and lower surfaces of the reading head seat form a rolling friction structure with the top cover and the bottom plate of the slide groove through the second steel ball.

[0021] Furthermore, the reading head seat has a threaded hole at its center on the side away from the encoder steel belt, and the elastic support structure includes a threaded adjusting sleeve. One end of the threaded adjusting sleeve that extends into the elastic support housing has a baffle plate, and the portion of the threaded adjusting sleeve extending out of the elastic support housing is locked in place by a nut.

[0022] One end is fitted into the threaded hole of the reading head seat, and the other end is inserted into the mandrel inside the threaded adjusting sleeve. The mandrel can rotate and slide relative to the threaded adjusting sleeve.

[0023] The spring fitted on the outer wall of the mandrel is constrained by the threaded adjusting sleeve through the baffle, the mandrel, and the reading head seat, and is kept in a compressed state.

[0024] Furthermore, both the bottom plate of the slide and the top cover have elongated slots on the surface near the encoder steel belt, and buffer pads are embedded in the elongated slots.

[0025] Furthermore, the adjustment mechanism includes an adjustment plate mounted on the upper end of the elastic support box; and

[0026] A rotating body connector attached to the upper end of the adjustment plate.

[0027] Furthermore, the top cover has an array of waist-shaped flange holes on both sides along the radial direction of the rotation axis, which are assembled with the adjustment plate using screws;

[0028] The adjustment plate has an array of waist-shaped flange holes tangential to the rotation axis on both sides. It is assembled with the rotating body connector using screws. By adjusting the relative positions between the top cover and the adjustment plate, and between the adjustment plate and the rotating body connector, the relative positions of the encoder reading head and the encoder steel belt can be adjusted.

[0029] Furthermore, a V-shaped groove is provided on the upper surface of the slide base plate. Two second steel balls are installed in the blind hole corresponding to the position of the reading head seat and the V-shaped groove. The five degrees of freedom of the reading head seat are constrained by multiple second steel balls, so that the reading head seat can move freely radially along the rotation axis.

[0030] In the above technical solution, the elastic support device for a large-diameter steel strip encoder reading head provided by the present invention has the following beneficial effects:

[0031] This invention discloses an elastic support device for the reading head of a large-diameter steel strip encoder. For steel strip encoders mounted on large diameters, this device utilizes a spring to apply preload, combined with steel balls to maintain the designed spacing between the reading head and the steel strip. This solves the problem of changes in physical spacing caused by the different coefficients of thermal expansion of the mounting base ring and upper rotating body in large-sized structures due to environmental temperature variations. These changes can affect the encoder's measurement accuracy, even leading to reading failures, and ultimately causing equipment malfunctions, shutdowns, or unexpected overruns. Furthermore, in the event of extreme impacts such as earthquakes, the spring structure can buffer the impact force radially along the rotation axis. Combined with two polyurethane buffer pads, this prevents physical collisions between the reading head and the steel strip caused by severe impacts, thus avoiding damage to both the encoder's reading head and steel strip. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0033] Figure 1 A three-dimensional assembly schematic diagram of an elastic support device for a large-diameter steel strip encoder reading head provided in an embodiment of the present invention;

[0034] Figure 2 An assembly cross-sectional view along the radial direction of the rotation axis of an elastic support device for a large-diameter steel strip encoder reading head provided in an embodiment of the present invention;

[0035] Figure 3 An elastic support device for a large-diameter steel strip encoder reading head is provided in an embodiment of the present invention. Figure 2 Enlarged view of point C in the middle;

[0036] Figure 4 A cross-sectional view along the tangential direction AA of a large-diameter steel strip encoder reading head provided in an embodiment of the present invention;

[0037] Figure 5 A cross-sectional view along the rotation axis of an elastic support device for a large-diameter steel strip encoder reading head provided in an embodiment of the present invention;

[0038] Figure 6 A three-dimensional part drawing of the slide bottom plate in an elastic support device for a large-diameter steel strip encoder reading head, provided for an embodiment of the present invention;

[0039] Figure 7 This is a front view of the slide bottom plate in an elastic support device for a large-diameter steel strip encoder reading head provided in an embodiment of the present invention;

[0040] Figure 8 A plan view of the slide groove bottom plate in the elastic support device of the large-diameter steel belt encoder reading head provided by the embodiment of the present application;

[0041] Figure 9 A left view of the slide groove bottom plate in the elastic support device of the large-diameter steel belt encoder reading head provided by the embodiment of the present application;

[0042] Figure 10 A three-dimensional part drawing of the top cover in the elastic support device of the large-diameter steel belt encoder reading head provided by the embodiment of the present application;

[0043] Figure 11 A front view of the top cover in the elastic support device of the large-diameter steel belt encoder reading head provided by the embodiment of the present application;

[0044] Figure 12 A bottom view of the top cover in the elastic support device of the large-diameter steel belt encoder reading head provided by the embodiment of the present application;

[0045] Figure 13 A left view of the top cover in the elastic support device of the large-diameter steel belt encoder reading head provided by the embodiment of the present application;

[0046] Figure 14 A three-dimensional part drawing of the reading head seat in the elastic support device of the large-diameter steel belt encoder reading head provided by the embodiment of the present application;

[0047] Figure 15 A front view of the reading head seat in the elastic support device of the large-diameter steel belt encoder reading head provided by the embodiment of the present application;

[0048] Figure 16 An elastic support device of a large-diameter steel belt encoder reading head provided by the embodiment of the present application Figure 15 A stepped sectional view F-F of the reading head seat in the elastic support device of the large-diameter steel belt encoder reading head provided by the embodiment of the present application;

[0049] Figure 17 A three-dimensional part drawing G-G of the reading head seat in the elastic support device of the large-diameter steel belt encoder reading head provided by the embodiment of the present application; Figure 15

[0050] A plan view of the reading head seat in the elastic support device of the large-diameter steel belt encoder reading head provided by the embodiment of the present application; Figure 18

[0051] A bottom view of the reading head seat in the elastic support device of the large-diameter steel belt encoder reading head provided by the embodiment of the present application; Figure 19

[0052] ​Figure 20 A three-dimensional part drawing of a threaded adjusting sleeve in an elastic supporting device of a large-diameter steel belt encoder reading head provided by an embodiment of the present application;

[0053] Figure 21 A sectional view of a threaded adjusting sleeve in an elastic supporting device of a large-diameter steel belt encoder reading head provided by an embodiment of the present application;

[0054] Figure 22 A left view of a threaded adjusting sleeve in an elastic supporting device of a large-diameter steel belt encoder reading head provided by an embodiment of the present application.

[0055] Legend of reference signs:

[0056] 1, steel belt mounting ring; 2, encoder steel belt; 3, elastic supporting box body; 4, reading head seat; 5, first steel ball; 6, elastic supporting structure; 7, adjusting mechanism; 8, encoder reading head; 9, second steel ball; 10, buffer pad;

[0057] 301, sliding groove bottom plate; 302, top cover; 303, end cover plate; 3011, V-shaped groove;

[0058] 601, threaded adjusting sleeve; 602, nut; 603, mandrel; 604, spring; 605, baffle;

[0059] 701, adjusting plate; 702, rotating body connecting piece. DETAILED DESCRIPTION

[0060] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the drawings.

[0061] Referring to Figures 1-22 the drawings;

[0062] The elastic supporting device of the large-diameter steel belt encoder reading head of the present application comprises:

[0063] a steel belt mounting ring 1; and

[0064] an encoder steel belt 2 adhered to the outer cylindrical surface of the steel belt mounting ring 1;

[0065] an elastic supporting box body 3 located at one side of the steel belt mounting ring 1 and having an accommodating space formed inside;

[0066] a reading head seat 4 provided in the elastic supporting box body 3, the reading head seat 4 being provided with an encoder reading head 8 mounted therein and fixed by a screw, and the reading head seat 4 being provided with a rolling friction structure with the elastic supporting box body 3 at the upper and lower ends thereof;

[0067] The read head seat 4 is coaxial with the steel band mounting ring 1 on the upper and lower frame surfaces of one side of the encoder steel band 2, and is provided with an array of blind holes along the radial direction of the rotary shaft, and two groups of first steel balls 5 are arranged in the blind holes to keep contact with the non-steel band area of the steel band mounting ring 1. The depth of the blind hole and the diameter of the first steel ball 5 are designed to keep the radial distance between the encoder read head 8 and the encoder steel band 2 along the rotary shaft not less than the designed distance D, and the first steel ball 5 also helps to reduce the frictional resistance of relative motion.

[0068] The elastic support device further comprises:

[0069] An elastic support structure 6 is mounted at the end of the read head seat 4 away from the encoder steel band 2; and

[0070] An adjustment mechanism 7 is connected to the top of the elastic support box 3 to adjust the relative position of the encoder read head 8 and the encoder steel band 2.

[0071] As a further introduction to this embodiment, the elastic support box 3 comprises a chute bottom plate 301; and

[0072] A top cover 302 is mounted on the upper end of the chute bottom plate 301;

[0073] An end cover plate 303 is assembled by screws on the side of the chute bottom plate 301 and the top cover 302 away from the encoder steel band 2, and a threaded hole is provided in the middle of the end cover plate 303 to cooperate with the elastic support structure 6.

[0074] As a further introduction to this embodiment, the upper surface and the lower surface of the read head seat 4 are respectively provided with at least three blind holes, and the second steel balls 9 are arranged in the blind holes, and the upper surface and the lower surface of the read head seat 4 form a rolling friction structure with the top cover 302 and the chute bottom plate 301 respectively through the second steel balls 9.

[0075] As a further introduction to this embodiment, a threaded hole is provided in the center of the side of the read head seat 4 away from the encoder steel band 2, and the elastic support structure 6 comprises a threaded adjusting sleeve 601, one end of the threaded adjusting sleeve 601 is provided with a stop piece 605, and the part of the threaded adjusting sleeve 601 protruding out of the elastic support box 3 is locked by a nut 602 to keep the adjusted pre-tightening force unchanged; and

[0076] One end of the core shaft 603 is assembled in the threaded hole of the read head seat 4, and the other end is inserted into the threaded adjusting sleeve 601, and the core shaft 603 can rotate and slide relative to the threaded adjusting sleeve 601;

[0077] The spring 604 is sleeved on the outer wall of the mandrel 603, the threaded adjusting sleeve 601 is jointly constrained by the check piece 605, the mandrel 603 and the reading head seat 4, and the spring 604 is in a compressed state, thereby exerting a pre-tightening force on the ball set between the reading head seat 4 and the steel belt mounting ring 1 along the radial direction of the rotary shaft, and ensuring that the radial distance between the encoder reading head 8 and the encoder steel belt 2 along the rotary shaft is not greater than the designed distance D. The large end of the threaded adjusting sleeve 601 is designed as a hexagonal head structure with a retaining edge, facilitating the adjustment of the relative position of the threaded adjusting sleeve 601 and the end cover plate 303 by using a wrench, thereby adjusting the compression degree of the spring 604, and finally realizing the adjustment of the pre-tightening force.

[0078] Specifically, the end cover plate 303 is assembled with the sliding groove bottom plate 301 and the top cover 302 on the side away from the encoder steel belt 2 by means of screws. The middle part of the end cover plate 303 is designed with a threaded hole matched with the external thread of the small end of the threaded adjusting sleeve 601.

[0079] As a further introduction to the embodiment, the surfaces of the sliding groove bottom plate 301 and the top cover 302 close to the side of the encoder steel belt 2 are both provided with long through grooves, and the long through grooves are embedded with buffer pads 10. Figure 3 As shown in the figure, the buffer pad 10 protrudes from the sliding groove bottom plate 301 and the top cover 302 by a height E, and the protruding part is flush with the encoder reading head 8. In the case of extreme impact such as earthquake, large-sized parts or assemblies have a large amplitude, and the spring 604 and the buffer pad 10 jointly act to buffer the radial impact force along the rotary shaft, so as to ensure that the sliding groove bottom plate 301 and the top cover 302 will not rigidly collide with the encoder steel belt 2 and the steel belt mounting ring 1, thereby affecting the precision of the encoder or even damaging the encoder.

[0080] As a further introduction to the embodiment, the adjusting mechanism 7 comprises an adjusting plate 701 assembled on the upper end of the elastic support box 3, and

[0081] A rotating body connecting piece 702 is connected to the upper end of the adjusting plate 701.

[0082] As a further introduction to the embodiment, the top cover 302 is provided with an array of waist-shaped flange holes along the radial direction of the rotary shaft on both sides, and is assembled with the adjusting plate 701 by means of screws.

[0083] The adjusting plate 701 is provided with an array of waist-shaped flange holes along the tangential direction of the rotary shaft on both sides, and is assembled with the rotating body connecting piece 702 by means of screws. The relative positions between the top cover 302 and the adjusting plate 701, and between the adjusting plate 701 and the rotating body connecting piece 702 are adjusted respectively, so as to realize the adjustment of the relative positions of the encoder reading head 8 and the encoder steel belt 2.

[0084] When the ambient temperature changes, the elastic support structure 6 described above can avoid the distance between the encoder reading head 8 and the encoder steel belt 2 changing along the radial direction of the rotating shaft due to the different thermal expansion coefficients of the lower large-diameter steel belt mounting ring 1 and the associated assembly and the upper rotating body connecting piece 702 and the associated assembly, so that the distance always remains the designed distance D.

[0085] As a further introduction to this embodiment, the upper surface of the chute bottom plate 301 is provided with a V-shaped groove 3011, the reading head seat 4 is provided with two second steel balls 9 installed in the blind hole at the corresponding position of the V-shaped groove 3011, the five degrees of freedom of the reading head seat 4 are jointly constrained by the plurality of second steel balls 9, only one degree of freedom along the radial direction of the rotating shaft is left, and the free movement of the reading head seat 4 in this direction is realized. The side surface of the reading head seat 4 and the side surface of the top cover 302 are slotted at the corresponding positions, so as to facilitate the reading head cable to extend out.

[0086] The above only describes some exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A resilient support device for a large diameter steel tape encoder readhead, characterised in that, The elastic support device comprises: a steel belt mounting ring (1); and an encoder steel belt (2) adhered to the outer cylindrical surface of the steel belt mounting ring (1); an elastic support box body (3) located at one side of the steel belt mounting ring (1) and having an accommodating space formed inside; a reading head seat (4) provided in the elastic support box body (3), the reading head seat (4) being provided with an encoder reading head (8) mounted therein, and the upper and lower ends of the reading head seat (4) being provided with rolling friction structures with the elastic support box body (3); the upper and lower edge frame surfaces of the reading head seat (4) near one side of the encoder steel belt (2) are provided with cylindrical surfaces coaxial with the steel belt mounting ring (1) and blind hole arrays along the radial direction of the rotary shaft, and two groups of first steel balls (5) are arranged in the blind holes and in contact with the non-steel belt area of the steel belt mounting ring (1); the elastic support device further comprises: an elastic support structure (6) mounted at the end of the reading head seat (4) away from the encoder steel belt (2); and an adjusting mechanism (7) connected to the top of the elastic support box body (3) and used for adjusting the relative positions of the encoder reading head (8) and the encoder steel belt (2); the elastic support box body (3) comprises a sliding groove bottom plate (301); a top cover (302) mounted at the upper end of the sliding groove bottom plate (301); an end cover plate (303) screw-fitted on the sliding groove bottom plate (301) and the top cover (302) away from the encoder steel belt (2), the middle part of the end cover plate (303) being provided with a threaded hole for cooperation with the elastic support structure (6); the upper and lower surfaces of the reading head seat (4) are respectively provided with at least three blind holes, and the blind holes are provided with second steel balls (9), and the upper and lower surfaces of the reading head seat (4) form rolling friction structures with the top cover (302) and the sliding groove bottom plate (301) through the second steel balls (9); a threaded hole is formed in the center of the side of the reading head seat (4) away from the encoder steel belt (2), the elastic support structure (6) comprises a threaded adjusting sleeve (601), one end of the threaded adjusting sleeve (601) extending into the elastic support box body (3) is provided with a baffle (605), and the part of the threaded adjusting sleeve (601) extending out of the elastic support box body (3) is locked and prevented from loosening through a nut (602); and a mandrel (603) assembled in the threaded hole of the reading head seat (4) at one end and inserted into the inside of the threaded adjusting sleeve (601) at the other end, the mandrel (603) being capable of rotating and sliding relative to the threaded adjusting sleeve (601); a spring (604) sleeved on the outer wall of the mandrel (603), the threaded adjusting sleeve (601) being jointly constrained by the baffle (605), the mandrel (603) and the reading head seat (4) and being in a compressed state.

2. A resilient support device for a large diameter steel tape encoder readhead according to claim 1, wherein, long through grooves are formed in the surfaces of the sliding groove bottom plate (301) and the top cover (302) near the side of the encoder steel belt (2), and a buffer pad (10) is embedded in the long through grooves.

3. The resilient support device for a large diameter steel tape encoder read head of claim 1 wherein, The adjusting mechanism (7) comprises an adjusting plate (701) assembled on the upper end of the elastic support box (3); and A rotating body connecting piece (702) connected on the upper end of the adjusting plate (701).

4. A resilient support device for a large diameter steel tape encoder readhead according to claim 3, wherein, Both sides of the top cover (302) are provided with an array of waist-shaped flange holes along the radial direction of the rotation axis, and are assembled with the adjusting plate (701) by screws; Both sides of the adjusting plate (701) are provided with an array of waist-shaped flange holes along the tangential direction of the rotation axis, and are assembled with the rotating body connecting piece (702) by screws, and the relative positions between the top cover (302) and the adjusting plate (701), and the adjusting plate (701) and the rotating body connecting piece (702) are adjusted respectively, so as to adjust the relative position of the encoder reading head (8) and the encoder steel belt (2).

5. The resilient support apparatus for a large diameter steel belt encoder read head of claim 1 wherein, A V-shaped groove (3011) is arranged on the upper surface of the chute bottom plate (301), two second steel balls (9) are installed in the blind holes corresponding to the V-shaped groove (3011) of the reading head seat (4), and the five degrees of freedom of the reading head seat (4) are jointly constrained by the plurality of second steel balls (9), so that the reading head seat (4) can move freely along the radial direction of the rotation axis.

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