Gear multi-turn absolute value encoder

Abstract

The present application relates to gear absolute value encoder technical field, specifically relates to a kind of gear multi-turn absolute value encoder, including encoding mechanism, the encoding mechanism includes spindle, the spindle is sleeved with centering mechanism, the centering mechanism includes shell, fixed part is provided in the shell, the fixed part is sleeved on the spindle, clamping piece is provided in the shell, and the clamping piece is connected with equipment shaft body;The beneficial effects of the present application are that: by the setting of centering mechanism, the centering mechanism can be connected with spindle by fixed part, and the centering mechanism is connected with equipment shaft body by clamping piece, so that the spindle and equipment shaft body are realized centring connection, and the encoder is installed on equipment by user.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gear absolute value encoder, and particularly relates to a gear multi-turn absolute value encoder. BACKGROUND

[0002] A gear absolute value encoder is a sensor that combines the functions of a gear and an absolute value encoder. This device is mainly used to measure the position of rotational motion and can provide absolute position information relative to a fixed reference point. In the fields of industrial automation, robotics, CNC machine tools, etc., gear absolute value encoders are widely used to accurately control the position of devices such as motors or mechanical arms.

[0003] Specifically, an absolute value encoder is different from an incremental encoder, which can only provide the change of relative position (i.e. how much it has moved from one point to another), while an absolute value encoder can give the current angular position at any time, without the need to recalibrate the zero point even after power failure. This is because each position has a unique code or value corresponding to it, usually represented by binary or other encoding methods.

[0004] A gear absolute value encoder usually contains a gear connected to the rotating shaft, which interacts with the reading head inside the encoder to ensure accurate detection of position changes even at low speeds or stops.

[0005] When installing and using a gear absolute value encoder, the main shaft of the encoder needs to be connected and centered with the shaft body of the device. The traditional centering connection method is cumbersome, and users may not easily connect the main shaft with the shaft body, which is time-consuming and laborious to operate.

[0006] Therefore, there is a need for a gear multi-turn absolute value encoder to solve the above problems. SUMMARY

[0007] In order to solve the above problems, that is, to solve the problem of connecting the main shaft of the absolute value encoder with the shaft body of the device, which is cumbersome, time-consuming and laborious, the present application provides a gear multi-turn absolute value encoder.

[0008] A gear multi-turn absolute value encoder includes an encoding mechanism, the encoding mechanism includes a main shaft, a centering mechanism is sleeved on the main shaft, the centering mechanism includes a shell, a fixing member is arranged in the shell, the fixing member is sleeved on the main shaft, a clamping member is arranged in the shell, and the clamping member is connected with a device shaft body.

[0009] Specifically, when in use, the main shaft is inserted into the shell, then the fixing member is connected with the main shaft, then the device shaft body is inserted into the shell, and the clamping member is connected with the device shaft body, thereby realizing the centering connection of the main shaft and the device shaft body.

[0010] Through the setting of the centering mechanism, the centering mechanism can be connected with the main shaft through the fixing piece and connected with the equipment shaft body through the clamping piece, so that the main shaft and the equipment shaft body are connected in centering, and the user can conveniently install the encoder on the equipment.

[0011] Preferably, the encoding mechanism comprises a frame, a main shaft is rotatably connected in the frame, the main shaft penetrates the frame, a driving gear is fixedly sleeved on the main shaft, a main shaft magnet is coaxially arranged on the driving gear, the main shaft magnet is electrically connected with a circuit board, three driven gears are uniformly rotatably connected in the frame in the circumferential direction, the three driven gears are uniformly distributed around the driving gear, the three driven gears are all in mesh with the driving gear, each driven gear is coaxially provided with a coaxial magnet, and the coaxial magnet is electrically connected with the circuit board.

[0012] Through the setting of the driving gear and the three driven gears, when the main shaft rotates, the driving gear can drive the three driven gears to rotate, the rotation of the three driven gears can drive the corresponding coaxial magnets to rotate, and the position signal of the rotation of the driven gear is output through the circuit board, so that the angle position signal is output.

[0013] Preferably, a plane a is arranged in the axial direction of the main shaft, the fixing piece comprises a shaft sleeve sleeved on the main shaft, the inner annular surface of the shaft sleeve is attached to the circumferential surface of the main shaft and the plane a, two fixed rods are fixedly and symmetrically connected on the shaft sleeve, the two fixed rods are fixedly connected with the inner wall of the shell, and an insertion hole is formed in the shell.

[0014] Specifically, in use, the main shaft is inserted into the shell through the insertion hole, and at the same time, the main shaft penetrates the shaft sleeve, the shaft sleeve is sleeved on the main shaft, the inner annular surface of the shaft sleeve is attached to the circumferential surface of the main shaft and the plane a, when the shell rotates, the shell drives the fixed rods to rotate, the fixed rods drive the shaft sleeve to rotate, and when the shaft sleeve rotates, the shaft sleeve drives the main shaft to rotate.

[0015] Through the setting of the fixing piece, the shaft sleeve is sleeved on the main shaft, the inner annular surface of the shaft sleeve is attached to the circumferential surface of the main shaft and the plane a, so that the shaft sleeve can drive the main shaft to rotate.

[0016] Preferably, a plane b is arranged in the axial direction of the equipment shaft body, the clamping piece comprises a hollow tube fixedly connected to the inner wall of the shell, a sliding rod is slidably connected in the hollow tube, an abutting plate is fixedly connected to the end of the sliding rod, the abutting plate can be attached to the plane b, a first spring is connected between the sliding rod and the hollow tube, a through hole is formed in the shell, and the hollow tube is communicatively provided with an air source.

[0017] Specifically, in use, the equipment shaft body is inserted into the shell through the penetrating hole, then the plane b corresponds to the abutment plate, then the hollow tube is supplied with gas through the gas source, the sliding rod slides out of the hollow tube, the sliding rod stretches the first spring, the sliding rod drives the abutment plate to move towards the equipment shaft body, and the abutment plate abuts against the plane b on the equipment shaft body.

[0018] The abutment plate can be attached to the plane b on the equipment shaft body through the clamping piece, the abutment plate can be driven to rotate by the plane b when the equipment shaft body rotates, the abutment plate drives the shell to rotate, and the shell drives the main shaft to rotate through the fixing piece.

[0019] Preferably, the clamping piece further comprises two rod sleeves rotationally connected to the inner wall of the shell, an active rod is threadedly connected in each rod sleeve, and the end portions of the two active rods are fixedly connected to an auxiliary plate.

[0020] Specifically, according to the diameter of the equipment shaft body, the rod sleeve is rotated to drive the active rod to move, the active rod drives the auxiliary plate to move, and the auxiliary plate is moved to an adaptive position; after the equipment shaft body is inserted into the shell, the equipment shaft body abuts against the auxiliary plate first.

[0021] Through the arrangement of the rod sleeve, the position of the auxiliary plate can be adjusted according to the diameter of the equipment shaft body in use, so that the equipment shaft body abuts against the auxiliary plate after being inserted into the shell, and the equipment shaft body is coaxial with the main shaft.

[0022] Preferably, the gas source comprises a cylinder fixedly connected in the shell, an sliding plate is slidingly connected in the cylinder, a second spring is connected between the sliding plate and the cylinder, a jacking rod is fixedly connected to the sliding plate, the jacking rod extends out of the cylinder, the jacking rod can abut against the end portion of the equipment shaft body, a gas pipe is in communication with the cylinder, and the gas pipe is in communication with the hollow tube.

[0023] Specifically, in use, when the equipment shaft body is inserted into the shell, the end portion of the equipment shaft body abuts against the jacking rod, the jacking rod drives the sliding plate to compress the second spring, the gas in the cylinder enters the hollow tube through the gas pipe, and the abutment plate abuts against the b surface of the equipment shaft body.

[0024] Through the arrangement of the gas source, the gas in the cylinder can enter the hollow tube through the gas pipe by abutting against the jacking rod during the process that the equipment shaft body is inserted into the shell, so that the abutment plate abuts against the b surface of the equipment shaft body, and the main shaft is conveniently connected with the equipment shaft.

[0025] Preferably, the top rod is provided with a retaining member, the retaining member comprises a sliding hole opened in the shell, a plug rod is slidably connected in the sliding hole, the plug rod extends out of the shell, a third spring is connected between the extending end of the plug rod and the shell, a plug slot is opened in the top rod, the end of the plug rod is capable of being inserted into the plug slot, and the end of the plug rod close to the equipment shaft body is provided with a chamfer.

[0026] Specifically, when the top rod moves towards the cylinder body under the action of the equipment shaft body, the edge of the top rod abuts against the chamfer of the plug rod, so that the plug rod stretches the third spring to move outward, when the plug slot moves to the position of the plug rod, the plug rod is inserted into the plug slot under the action of the third spring, so that the plug rod limits the top rod; when it is needed to release the limitation of the top rod, the plug rod is pulled out of the plug slot to release the limitation of the top rod.

[0027] Through the setting of the retaining member, the top rod can be locked by the plug rod, so that the air pressure in the hollow pipe is maintained, and the clamping of the abutting plate on the equipment shaft body is maintained.

[0028] Further, the shell is made of transparent material.

[0029] The beneficial effects of the present application are:

[0030] 1. Through the setting of the centering mechanism, the centering mechanism can be connected with the main shaft through the fixing member, and the centering mechanism can be connected with the equipment shaft body through the clamping member, so that the main shaft and the equipment shaft body are connected in centering, and the user can conveniently install the encoder on the equipment.

[0031] 2. Through the setting of the driving gear and the three driven gears, when the main shaft rotates, the driving gear can drive the three driven gears to rotate, the rotation of the three driven gears can drive the corresponding coaxial magnets to rotate, and the position signal of the rotation of the driven gears is output through the circuit board, so that the angle position signal is output.

[0032] 3. Through the setting of the fixing member, the shaft sleeve is sleeved on the main shaft, the inner annular surface of the shaft sleeve is attached to the circumferential surface of the main shaft and the plane a, so that the shaft sleeve can drive the main shaft to rotate. Through the setting of the clamping member, the abutting plate can be attached to the plane b on the equipment shaft body, so that when the equipment shaft body rotates, the abutting plate can be driven to rotate through the plane b, so that the abutting plate drives the shell to rotate, and the shell drives the main shaft to rotate through the fixing member.

[0033] 4. Through the setting of the rod sleeve, the position of the auxiliary plate can be adjusted according to the diameter of the equipment shaft body during use, so that after the equipment shaft body is inserted into the shell, the equipment shaft body abuts against the auxiliary plate, and the equipment shaft body is coaxial with the main shaft.

[0034] 5. By setting up the air source component, during the process of inserting the equipment shaft into the housing, the gas in the cylinder can enter the hollow tube through the air pipe via the abutting rod, thereby abutting the abutting plate against the b-side of the equipment shaft, facilitating the docking of the main shaft and the equipment shaft. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0036] Figure 2 This is the front view of the present invention;

[0037] Figure 3 For the present invention Figure 2 Isometric side sectional view at point AA;

[0038] Figure 4 For the present invention Figure 2 Isometric side sectional view at point BB;

[0039] Figure 5 For the present invention Figure 2 Isometric side sectional view at point CC;

[0040] Figure 6 For the present invention Figure 4 A magnified view of a section at point D;

[0041] Figure 7 This is the left view of the present invention;

[0042] Figure 8 For the present invention Figure 7 Isometric side sectional view at EE;

[0043] Figure 9 For the present invention Figure 8 A magnified view of a section at point F.

[0044] In the picture:

[0045] 1. Encoding mechanism; 11. Main shaft; 12. Frame; 13. Driving gear; 14. Driven gear;

[0046] 2. Centering mechanism; 21. Housing; 22. Fixing component; 221. Bushing; 222. Fixing rod; 223. Insertion hole; 23. Clamping component; 231. Hollow tube; 232. Sliding rod; 233. Abutment plate; 234. First spring; 235. Through hole; 236. Rod sleeve; 237. Movable rod; 238. Auxiliary plate; 24. Air source component; 241. Cylinder body; 242. Sliding plate; 243. Second spring; 244. Push rod; 245. Air pipe; 25. Holding component; 251. Sliding hole; 252. Insertion rod; 253. Third spring; 254. Slot;

[0047] 3, device shaft body. DETAILED DESCRIPTION

[0048] The preferred embodiments of the present application will be described below with reference to the drawings. Those skilled in the art will understand that the embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0049] As shown in Figure 1 , 4 , the embodiment of the present application discloses a gear multi-turn absolute value encoder, comprising an encoding mechanism 1, the encoding mechanism 1 comprises a main shaft 11, the main shaft 11 is sleeved with a centering mechanism 2, the centering mechanism 2 comprises a shell 21, the shell 21 is provided with a fixing piece 22, the fixing piece 22 is sleeved on the main shaft 11, the shell 21 is provided with a clamping piece 23, the clamping piece 23 is connected with a device shaft body 3.

[0050] Specifically, in use, the main shaft 11 is inserted into the shell 21, then the fixing piece 22 is connected with the main shaft 11, then the device shaft body 3 is inserted into the shell 21, and the clamping piece 23 is connected with the device shaft body 3, so that the main shaft 11 and the device shaft body 3 are connected in the center.

[0051] Through the setting of the centering mechanism 2, the centering mechanism 2 can be connected with the main shaft 11 through the fixing piece 22, and the centering mechanism 2 can be connected with the device shaft body 3 through the clamping piece 23, so that the main shaft 11 and the device shaft body 3 are connected in the center, which facilitates the user to install the encoder on the device.

[0052] As shown in Figure 3 , 4 , 8, the encoding mechanism 1 comprises a frame 12, the frame 12 is rotatably connected with the main shaft 11, the main shaft 11 penetrates the frame 12, the main shaft 11 is fixedly sleeved with a driving gear 13, the driving gear 13 is coaxially provided with a main shaft magnet, the main shaft magnet is electrically connected with a circuit board, the frame 12 is uniformly rotatably connected with three driven gears 14 in the circumferential direction, three driven gears 14 are uniformly distributed around the driving gear 13, three driven gears 14 are engaged with the driving gear 13, each driven gear 14 is coaxially provided with a coaxial magnet, and the coaxial magnet is electrically connected with the circuit board.

[0053] Specifically, in use, the device shaft body 3 rotates, the device shaft body 3 drives the clamping piece 23 to rotate, the clamping piece 23 drives the shell 21 to rotate, the shell 21 drives the fixing piece 22 to rotate, the fixing piece 22 drives the main shaft 11 to rotate, the main shaft 11 drives the driving gear 13 to rotate, the driving gear 13 drives the driven gear 14 to rotate, the driven gear 14 drives the corresponding coaxial magnet to rotate, and the angle position of the magnet is distinguished by the N and S poles of the magnet during rotation to give a position signal to the magnetic induction chip on the corresponding circuit board. Since the number of teeth of the three gears is different, the NS pole rotation positions of the three magnets are also different during synchronous rotation. Thus, the main shaft gear magnet corresponding magnetic sensing chip feeds back a single circle angle position digital signal, the three gear magnet corresponding magnetic sensing chip feeds back different angle position digital signals, and the different position digital signals fed back by 1, 2 and 3 are used to calculate a non-repeating position signal in the range of 1-10800 circles by single-chip microcomputer software. The single circle position signal fed back by the main shaft gear is combined to directly output an angle position signal greater than 360 degrees, which is converted into an industrial product commonly used communication protocol by the SPI interface signal of the magnetic induction chip using single-chip microcomputer language.

[0054] The driving gear 13 and the three driven gears 14 are arranged, so that when the main shaft 11 rotates, the driving gear 13 can drive the three driven gears 14 to rotate, the three driven gears 14 can drive the corresponding coaxial magnets to rotate, and the position signal of the rotation of the driven gear 14 is output through the circuit board, so as to output the angle position signal.

[0055] Further, the gear structure of the gear absolute value encoder is evolved from the principle of a mechanical watch. Through the principle of multiple gear sets and magnet fields, and after cooperation of electrical hardware and software, an angle position measurement feedback greater than a single circle angle of 360 degrees is realized. Generally, a coaxial gear of a main shaft is used as a single circle counting gear end face, a coaxial double-pole magnet is installed on the coaxial gear to sense a magnetic chip, the magnetic chip outputs an SPI signal to feed back a single circle angle position. The coaxial gear of the main shaft simultaneously drives the other three driven gears to rotate, and each driven gear end face also has a coaxial double-pole magnet installed thereon to correspond to a magnetic chip. The tooth ratios of the three driven gears are 52 teeth, 54 teeth and 64 teeth respectively, and then the SPI position signals output by the magnetic chips corresponding to the coaxial double-pole magnets on the end faces of the three driven gears are simultaneously transmitted to the MCU. The MCU program calculates non-repeating position signals greater than one circle and adds the single circle angle position signal to obtain an angle position signal feedback greater than one circle.

[0056] As Figure 8 , 9As shown, the axial direction of the main shaft 11 is provided with a plane a, the fixing part 22 comprises a sleeve 221 sleeved on the main shaft 11, the inner annular surface of the sleeve 221 is attached to the circumferential surface of the main shaft 11 and the plane a, two fixed rods 222 are fixedly connected on the sleeve 221 in a symmetrical manner, the two fixed rods 222 are fixedly connected with the inner wall of the shell 21, and the shell 21 is provided with an insertion hole 223.

[0057] Specifically, in use, the main shaft 11 is inserted into the shell 21 through the insertion hole 223, and at the same time the main shaft 11 passes through the sleeve 221, the sleeve 221 is sleeved on the main shaft 11, the inner annular surface of the sleeve 221 is attached to the circumferential surface of the main shaft 11 and the plane a, when the shell 21 rotates, the shell 21 drives the fixed rod 222 to rotate, the fixed rod 222 drives the sleeve 221 to rotate, and when the sleeve 221 rotates, the sleeve 221 drives the main shaft 11 to rotate.

[0058] Through the arrangement of the fixing part 22, the sleeve 221 is sleeved on the main shaft 11, and the inner annular surface of the sleeve 221 is attached to the circumferential surface of the main shaft 11 and the plane a, so that the sleeve 221 can drive the main shaft 11 to rotate.

[0059] As Figure 5 、 8 , 9, the axial direction of the device shaft body 3 is provided with a plane b, the clamping part 23 comprises a hollow tube 231 fixedly connected to the inner wall of the shell 21, a sliding rod 232 is slidingly connected in the hollow tube 231, the end of the sliding rod 232 is fixedly connected with an abutting plate 233, the abutting plate 233 can be attached to the plane b, a first spring 234 is connected between the sliding rod 232 and the hollow tube 231, the shell 21 is provided with a through hole 235, and the hollow tube 231 is provided with an air source part 24 in communication.

[0060] Specifically, in use, the device shaft body 3 is inserted into the shell 21 through the through hole 235, then the plane b corresponds to the abutting plate 233, then air is supplied to the hollow tube 231 through the air source part 24, so that the sliding rod 232 slides out of the hollow tube 231, at the same time the sliding rod 232 stretches the first spring 234, and at the same time the sliding rod 232 drives the abutting plate 233 to move towards the device shaft body 3, so that the abutting plate 233 abuts against the plane b on the device shaft body 3.

[0061] Through the arrangement of the clamping part 23, the abutting plate 233 can be attached to the plane b on the device shaft body 3, so that when the device shaft body 3 rotates, the abutting plate 233 can be driven to rotate by the plane b, so that the abutting plate 233 drives the shell 21 to rotate, and the shell 21 drives the main shaft 11 to rotate through the fixing part 22.

[0062] AsFigure 5 、 9 As shown in the figure, the clamping piece 23 further comprises two rod sleeves 236 rotatably connected to the inner wall of the shell 21, and an active rod 237 is threadedly connected in each of the rod sleeves 236, and the end portions of the two active rods 237 are fixedly connected with an auxiliary plate 238.

[0063] Specifically, according to the diameter of the equipment shaft body 3, the rod sleeve 236 is rotated to move the active rod 237, and the active rod 237 drives the auxiliary plate 238 to move, so that the auxiliary plate 238 is moved to an appropriate position; after the equipment shaft body 3 is inserted into the shell 21, the equipment shaft body 3 is first abutted by the auxiliary plate 238.

[0064] Through the arrangement of the rod sleeve 236, the position of the auxiliary plate 238 can be adjusted according to the diameter of the equipment shaft body 3 during use, so that the equipment shaft body 3 is abutted by the auxiliary plate 238 after being inserted into the shell 21, and the equipment shaft body 3 is coaxial with the main shaft 11.

[0065] As shown in the figure, Figure 6 、 9 The air source piece 24 comprises a cylinder body 241 fixedly connected in the shell 21, a sliding plate 242 slidably connected in the cylinder body 241, a second spring 243 connected between the sliding plate 242 and the cylinder body 241, a jacking rod 244 fixedly connected on the sliding plate 242, the jacking rod 244 extending out of the cylinder body 241, the jacking rod 244 being capable of abutting against the end portion of the equipment shaft body 3, and the cylinder body 241 being communicatively provided with an air pipe 245, and the air pipe 245 being in communication with the hollow pipe 231.

[0066] Specifically, during use, when the equipment shaft body 3 is inserted into the shell 21, the end portion of the equipment shaft body 3 abuts against the jacking rod 244, so that the jacking rod 244 drives the sliding plate 242 to compress the second spring 243, and the gas in the cylinder body 241 enters the hollow pipe 231 through the air pipe 245, so that the abutting plate 233 abuts against the b surface of the equipment shaft body 3.

[0067] Through the arrangement of the air source piece 24, during the process of inserting the equipment shaft body 3 into the shell 21, the jacking rod 244 can be abutted, so that the gas in the cylinder body 241 enters the hollow pipe 231 through the air pipe 245, thereby making the abutting plate 233 abut against the b surface of the equipment shaft body 3, and facilitating the butt joint of the main shaft 11 and the equipment shaft body 3.

[0068] As shown in the figure, Figure 4 、 6As shown, the top rod 244 is provided with a retaining member 25, the retaining member 25 comprises a sliding hole 251 opened on the shell 21, a plug rod 252 is slidably connected in the sliding hole 251, the plug rod 252 extends out of the shell 21, a third spring 253 is connected between the extending end of the plug rod 252 and the shell 21, a plug slot 254 is opened on the top rod 244, the end of the plug rod 252 can be inserted into the plug slot 254, and the end of the plug rod 252 close to the equipment shaft body 3 is provided with a chamfer.

[0069] Specifically, in use, when the top rod 244 moves towards the cylinder body 241 under the action of the equipment shaft body 3, the edge of the top rod 244 abuts against the chamfer of the plug rod 252, so that the plug rod 252 stretches the third spring 253 to move outward, when the plug slot 254 moves to the position of the plug rod 252, the plug rod 252 is inserted into the plug slot 252 under the action of the third spring 253, so that the plug rod 252 limits the top rod 244; when it is needed to release the limitation of the top rod 244, the plug rod 252 is pulled out of the plug slot 254 to release the limitation of the top rod 244.

[0070] Through the setting of the retaining member 25, the top rod 244 can be locked by the plug rod 252, so that the air pressure in the hollow tube 231 is maintained, and the clamping of the abutting plate 233 to the equipment shaft body 3 is maintained.

[0071] Further, the shell 21 is made of transparent material.

[0072] It should be noted that, in the description of the present application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0073] In addition, it should be further pointed out that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0074] The term "comprising" or any other similar word is intended to encompass the inclusion of one or more steps, features, or elements but not to the exclusion of any other steps, features, or elements. The term "comprising" therefore indicates that the inclusion of one or more steps, features, or elements is not a requirement and that other steps, features, or elements can also be included.

[0075] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without deviating from the principles of the present application, and the technical solutions after these changes or replacements will all fall within the protection scope of the present application.

Claims

1. A gear multi-turn absolute value encoder, characterized in that, The application relates to an encoding mechanism (1) which comprises a main shaft (11) and a centering mechanism (2) sleeved on the main shaft (11), the centering mechanism (2) comprises a shell (21), a fixing piece (22) is arranged in the shell (21) and sleeved on the main shaft (11), and a clamping piece (23) is arranged in the shell (21) and connected with a device shaft body (3); A plane a is arranged in the axial direction of the main shaft (11), the fixing piece (22) comprises a shaft sleeve (221) sleeved on the main shaft (11), the inner annular surface of the shaft sleeve (221) is attached to the circumferential surface of the main shaft (11) and the plane a, two fixed rods (222) are fixedly connected to the shaft sleeve (221) in a symmetrical mode, the two fixed rods (222) are fixedly connected with the inner wall of the shell (21), and an insertion hole (223) is formed in the shell (21); A plane b is arranged in the axial direction of the device shaft body (3), the clamping piece (23) comprises a hollow tube (231) fixedly connected to the inner wall of the shell (21), a sliding rod (232) is slidingly connected in the hollow tube (231), the end portion of the sliding rod (232) is fixedly connected with an abutting plate (233), the abutting plate (233) can be attached to the plane b, a first spring (234) is connected between the sliding rod (232) and the hollow tube (231), a through hole (235) is formed in the shell (21), and the hollow tube (231) is connected with an air source piece (24) in a communication mode; The clamping piece (23) further comprises two rod sleeves (236) rotatably connected to the inner wall of the shell (21), an active rod (237) is threadedly connected in each rod sleeve (236), and the end portions of the two active rods (237) are fixedly connected with an auxiliary plate (238); The air source piece (24) comprises a cylinder body (241) fixedly connected in the shell (21), a sliding plate (242) is slidingly connected in the cylinder body (241), a second spring (243) is connected between the sliding plate (242) and the cylinder body (241), a jacking rod (244) is fixedly connected to the sliding plate (242), the jacking rod (244) extends out of the cylinder body (241) and can abut against the end portion of the device shaft body (3), and the cylinder body (241) is connected with an air pipe (245) in a communication mode, and the air pipe (245) is communicated with the hollow tube (231). The top rod (244) is provided with a retaining member (25), the retaining member (25) comprises a sliding hole (251) opened in the shell (21), a plug rod (252) is slidably connected in the sliding hole (251), the plug rod (252) extends out of the shell (21), a third spring (253) is connected between the extending end of the plug rod (252) and the shell (21), a plug slot (254) is opened in the top rod (244), the end of the plug rod (252) can be inserted into the plug slot (254), and the end of the plug rod (252) close to the equipment shaft body (3) is provided with a chamfer.

2. A multi-turn absolute encoder according to claim 1, wherein, The coding mechanism (1) comprises a frame (12), a main shaft (11) is rotatably connected in the frame (12), the main shaft (11) penetrates through the frame (12), a driving gear (13) is fixedly sleeved on the main shaft (11), a main shaft magnet is coaxially arranged on the driving gear (13), the main shaft magnet is electrically connected with a circuit board, three driven gears (14) are uniformly rotatably connected in the frame (12) in the circumferential direction, the three driven gears (14) are uniformly distributed around the driving gear (13), the three driven gears (14) are all in mesh with the driving gear (13), and each driven gear (14) is coaxially provided with a coaxial magnet, and the coaxial magnet is electrically connected with the circuit board.

3. A multi-turn absolute encoder according to claim 2, wherein, The shell (21) is made of transparent material.

Images