Hollow shaft encoder module

Abstract

The invention discloses a hollow shaft encoder module, and relates to the technical field of rotary tables. The hollow shaft encoder module comprises a fixed base, a bearing and a spring steel ball lock pin are arranged on the fixed base, a tested shaft is movably arranged in the bearing, one end of the tested shaft is in threaded connection with a transition shaft, and the transition shaft is in fastening connection with a hollow shaft of an encoder. The encoder is fixedly connected with the locking flange, and the locking flange is fixedly connected with the locking plate, thereby forming an integrally assembled and disassembled encoder module. The encoder module is rotated, so that the steel ball of the spring steel ball lock pin is ejected into the locking hole of the locking plate under the action of the spring, meanwhile, the flange of the locking flange enters the clamping groove of the fixed base, the encoder is locked, and the encoder module is reversely rotated to realize the disassembly of the encoder. By adopting the hollow shaft encoder module, tool-free assembly and disassembly can be realized under the condition that the hand operation space is limited, the operation is convenient, rapid assembly and disassembly can be realized, the assembly and disassembly problem of the encoder in a narrow space is solved, and the maintainability of encoder replacement is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rotary table, in particular to a hollow shaft encoder module. BACKGROUND

[0002] Encoder is a device for converting angular displacement into electrical signal. In the field of rotary table, encoder is mainly used for feedback of rotary angle information in rotary table servo system, and forms closed-loop control with servo drive.

[0003] The traditional installation method of hollow shaft encoder is that the rotating part of the encoder is tightly held on the measured shaft by a locking screw, and the fixed part of the encoder is connected with the fixed base by a screw. The encoder is a life part and needs to be replaced regularly. When the hollow shaft encoder is installed and removed in a narrow space where the structure size is limited, the space available for tool operation is small and the line of sight is blocked, resulting in difficulty in installation and removal, and poor maintainability of the encoder replacement. SUMMARY

[0004] The technical problem to be solved by the present application is to solve the installation and removal problems of the encoder in a narrow space and improve the maintainability of the encoder replacement.

[0005] To solve the above problems, the technical scheme adopted by the present application is: a hollow shaft encoder module, comprising a fixed base, an encoder module and a spring steel ball lock pin. The fixed base is provided with a bearing and a spring steel ball lock pin, the bearing is movably provided with a measured shaft, one end of the measured shaft is threadedly connected with a transition shaft, and the transition shaft is tightly connected with the rotating part of the encoder. The encoder module comprises the encoder, the encoder is fixedly connected with a locking flange, and the locking flange is fixedly connected with a locking plate. Rotating the encoder module makes the steel ball of the spring steel ball lock pin top into the locking hole of the locking plate under the action of the spring, at the same time, the flange of the locking flange enters the clamping groove of the fixed base, so as to realize the installation of the encoder; reversing the rotation of the encoder module realizes the disassembly of the encoder.

[0006] Preferably, the locking flange is provided with a flange, the flange is shaped as a two-side cut edge circle, the center of the locking flange is provided with a round hole for positioning stop, and the two positioning stops inside and outside are coaxial.

[0007] Preferably, the locking plate is provided with a plurality of locking holes in the same distribution circle, and is also provided with a plurality of guide grooves staggered at a certain angle with the locking holes in the same distribution circle, the guide grooves are from shallow to deep, and the upper and lower surfaces of the locking plate are provided with coaxial positioning bosses.

[0008] Preferably, the fixed base is provided with a groove, the groove is shaped as a two-side cut edge circle, the shape and size of the groove are slightly larger than those of the flange, the two cut edges of the groove are provided with clamping grooves, the height of the clamping grooves is greater than the thickness of the flange; the upper and lower surfaces of the fixed base are provided with coaxial positioning stops; the fixed base is provided with spring steel ball lock pins corresponding to the locking holes of the locking plate.

[0009] Preferably, the spring steel ball lock pin comprises an outer threaded shell, a spring, and a steel ball, the spring provides a pushing force to the steel ball; the spring steel ball lock pin is threadedly connected with the fixed base, and the adjustment of the screw-in depth adjusts the compression force of the spring steel ball lock pin on the locking plate.

[0010] Preferably, the transition shaft forms a clearance fit with the shaft hole of the hollow shaft encoder.

[0011] The method for using the hollow shaft encoder module is as follows: a. Installing the encoder module: 1. The encoder module is inserted into the transition shaft, the flange enters the groove, and the spring steel ball lock pin enters the guide groove of the locking plate. 2. The encoder module is rotated until the steel ball of the spring steel ball lock pin enters the locking hole of the locking plate, and the flange enters the clamping groove. 3. The tightening screw on the encoder rotating part is tightened to tightly hold the encoder rotating part and the transition shaft.

[0012] b. Disassembling the encoder module: 1. The tightening screw on the encoder rotating part is loosened to release the encoder rotating part from the transition shaft.

[0013] 2. The encoder module is rotated to move the steel ball of the spring steel ball lock pin away from the locking hole of the locking plate until the flange is separated from the clamping groove. 3. The encoder module is axially moved to be separated from the transition shaft.

[0014] The beneficial effects of the present application are: The hollow shaft encoder module only needs to rotate the encoder module during assembly and disassembly, which can automatically lock and disassemble the encoder, and can realize tool-free assembly and disassembly in the case of limited hand operation space, solve the assembly and disassembly problem of the encoder in a small space, and the operation is simple, which can realize quick assembly and disassembly, and improve the maintainability of replacing the encoder.

[0015] The present application has been successfully applied to a certain type of radar turntable, and the application shows that the hollow shaft encoder module is simple and fast to assemble and disassemble, and the rotation angle information feedback is stable and reliable during work. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The hollow shaft encoder module structure cross-sectional view shown in the present application.

[0017] Figure 2 The hollow shaft encoder module separation schematic diagram shown in the present application.

[0018] Figure 3 The structure schematic diagram of the encoder module shown in the present application.

[0019] Figure 4 This is a schematic diagram of the structure of the fixed base shown in this invention.

[0020] Reference numerals: 1-Fixed base, 2-Bearing, 3-Measured shaft, 4-Transition shaft, 5-Encoder, 501-Fixed part, 502-Rotating part, 6-Locking flange, 7-Locking plate, 8-Spring ball locking pin, 801-Spring, 802-Steel ball, 9-Encoder module, 601-Flange, 701-Locking hole, 702-Guide groove, 703-Positioning boss, 101-Groove, 102-Slot, 103-Positioning stop. Detailed Implementation

[0021] The hollow shaft encoder module of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 As shown, a hollow shaft encoder module includes a fixed base 1, on which a bearing 2 and a spring steel ball locking pin 8 are disposed. A measured shaft 3 is movably disposed in the bearing 2. One end of the measured shaft 3 is threadedly connected to a transition shaft 4, and the other end of the measured shaft 3 is fixedly connected to a turntable shaft. The transition shaft 4 is tightly connected to the rotating part 502 of the encoder 5. The fixed part 501 of the encoder 5 is fixedly connected to a locking flange 6, and the locking flange 6 is fixedly connected to a locking plate 7.

[0023] The locking flange 6 has a flange 601, which is shaped like rounded edges on both sides. The center of the locking flange 6 has a circular hole serving as a positioning stop, with the inner and outer positioning stops coaxial. The locking plate 7 has three locking holes 701 arranged on the same circular plane. Each locking hole 701 is a 90° tapered hole. It also has three guide grooves 702 arranged on the same circular plane as the locking holes 701 but offset at a certain angle. The guide grooves 702 range from shallow to deep. The locking plate 7 has coaxial positioning bosses 703 on both its upper and lower surfaces. The encoder 5, locking flange 6, and locking plate 7 are fixedly connected via the positioning stops to form the encoder module 9, ensuring that the encoder 5's rotating shaft is coaxial with the positioning bosses 703. The encoder module 9 functions as a single unit during assembly and disassembly.

[0024] The fixed base 1 is provided with a groove 101, which is shaped with rounded edges on both sides. The shape and size of the groove 101 are slightly larger than the shape and size of the flange 601. The two cut edges of the groove 101 are provided with slots 102, and the height of the slots 102 is greater than the thickness of the flange 601. The upper and lower surfaces of the fixed base 1 are provided with coaxial positioning stops 103.

[0025] The hollow shaft encoder module 9 is rotated to make the steel ball 802 of the spring steel ball lock pin 8 top into the locking hole 701 of the locking plate 7 under the action of the spring 801, and the flange 601 of the locking flange 6 enters the clamping groove 102 of the fixed base 1, so that the installation of the encoder 5 is realized; the encoder 5 is disassembled by reversing the rotation of the encoder module 9.

[0026] As shown in Figure 2 , Figure 3 , Figure 4 The use method of the hollow shaft encoder module includes installing the encoder module: 1】The encoder module 9 is inserted into the transition shaft 4, the positioning boss 703 and the positioning stop 103 realize the positioning of the encoder module 9 and the fixed base 1, and the steel ball 802 of the spring steel ball lock pin 8 enters the guide groove 702; 2】The encoder module 9 is rotated, the steel ball 802 moves from deep to shallow in the guide groove 702, and then enters the locking hole 701, at the same time, the flange 601 enters the clamping groove 102, and the fixed part 501 is locked; 3】The fastening screw on the rotating part 502 is tightened to make the rotating part 502 tightly hold the transition shaft 4.

[0027] The use method of the hollow shaft encoder module includes disassembling the encoder module: 1】The fastening screw on the rotating part 502 is loosened to make the rotating part 502 and the transition shaft 4 release the tight holding; 2】The encoder module 9 is rotated, the steel ball 802 leaves the locking hole 701 and enters the guide groove 702, the flange 601 leaves the clamping groove 102, and the fixed part 501 is unlocked; 3】When the flange 601 and the two side cutting circular shapes of the clamping groove 102 are aligned, the encoder module 9 is removed from the transition shaft 4.

[0028] Compared with the traditional method of connecting the encoder by a screw, the hollow shaft encoder module only needs to rotate the encoder module during the installation and disassembly process, so that the automatic locking and disassembly of the encoder can be completed. Since no tools are needed for installation and disassembly, the encoder can be simply and conveniently installed and disassembled in a space with limited size, the problem of installing and disassembling the encoder in a narrow space is solved, the operation is simple, the installation and disassembly are fast, and the maintainability of replacing the encoder is improved.

[0029] The above embodiments only exemplarily illustrate the principles and effects of the present application and some applied embodiments, and are not used to limit the present application; it should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A hollow shaft encoder module, characterized by: The utility model relates to a kind of spring steel ball lock pin and encoder module, including fixed base (1), encoder module (9), spring steel ball lock pin (8);Fixed base (1) is provided with bearing (2) and spring steel ball lock pin (8), bearing (2) is movably provided with measured shaft (3), the measured shaft (3) one end is threadedly connected transition shaft (4), the transition shaft 4 is tightly connected with the rotating part 502 of encoder 5;Encoder module (9) includes the encoder (5), locking flange (6), locking plate (7);The steel ball (802) of spring steel ball lock pin (8) enters the locking hole (701) of locking plate (7), while the flange (601) of locking flange (6) enters the clamping groove (102) of the fixed base (1).

2. The hollow shaft encoder module of claim 1, wherein: Locking flange (6) is equipped with flange (601), the flange (601) is shaped as two sides cutting edge circle, the center of the locking flange (6) is equipped with the round hole of positioning stopper.

3. The hollow shaft encoder module of claim 1, wherein: Locking plate (7) is equipped with several locking holes (701) in same distribution circle, and is also equipped with several guide grooves (702) in same distribution circle and staggered by certain angle with the locking hole (701), the locking plate (7) is equipped with coaxial positioning boss (703) on upper and lower surfaces.

4. The hollow shaft encoder module of claim 1, wherein: Fixed base (1) is equipped with recess (101), the recess (101) is shaped as two sides cutting edge circle, the shape size of the recess (101) is slightly larger than the shape size of the flange (601), the two cutting edges of the recess (101) are equipped with clamping groove (102), the height of the clamping groove (102) is greater than the thickness of flange (601).

5. The hollow shaft encoder module of claim 1, wherein: Spring steel ball lock pin (8) is threadedly connected on fixed base (1), and the compression force of spring steel ball lock pin (8) to locking plate (7) can be adjusted.

6. The hollow shaft encoder module of claim 1, wherein: Transition shaft (4) and the shaft hole of encoder (5) form clearance fit.

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