Combined bearings and combined bearings with encoders

Abstract

The present invention relates to the technical field of bearings, a combined bearing, comprising an upper bearing and a lower bearing, wherein the upper bearing comprises an upper bearing outer ring and an upper bearing inner ring; one end of the upper bearing inner ring is an inner ring member, and the lower bearing comprises a lower bearing outer ring and a lower bearing inner ring; the other end of the upper bearing inner ring is a shaft member, which passes through the lower bearing inner ring and is locked on the lower bearing inner ring by a locking sleeve; the upper bearing outer ring and the lower bearing outer ring are closely matched. The combined bearing with an encoder also comprises an encoder assembly, which comprises a code disc, a photoelectric assembly and a sensing assembly, wherein the code disc is mounted on the inner ring of the upper bearing, the sensing assembly is mounted on the inner bottom surface of the lower bearing outer ring, the photoelectric assembly comprises a light source and irradiates the code disc, and the photoelectric assembly is connected to the sensing assembly circuit. According to the technical solution of the present invention, the combined bearing is integrated, the installation links are reduced, the inherent accuracy of the bearing is ensured, and the rotation stability is effectively improved. At the same time, the assembly and disassembly are convenient, which is conducive to maintenance, and the integrated structure saves space and has a beautiful appearance.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, in particular to a bearing used for a bearing and a bearing with an encoder. Background Art

[0002] Bearings are an important component in mechanical equipment, and the combination of encoders and bearings is becoming more and more common. Existing bearing encoders, such as Figure 1 As shown, it includes a bearing and an encoder assembly, the bearing includes an upper bearing 1 and a lower bearing 2, the encoder assembly includes an encoder seat 6, a code disc 42, an inductive assembly 43, a photoelectric assembly 41, a code disc support sleeve 9, a copper shaft 7 and a protective cover 8, the photoelectric assembly 41 and the inductive member 43 are installed on the encoder, the copper shaft 7 passes through and is interference-fitted with the lower bearing 2, the encoder seat 6, the upper bearing 1 and the code disc support disc 9, and the code disc 42 is installed on the code disc support disc 9. The encoder has many mounting surfaces and complex processing, and multiple parts are installed together. The clearance cannot be quantitatively eliminated when the bearing is assembled, and the combination accuracy is poor. In particular, the design of the encoder seat is large in size and limited in application scenarios. In addition, the matching mode between the copper shaft and the bearing is not conducive to disassembly and installation. If a single part is damaged, it may be scrapped as a whole and cannot be partially repaired. Summary of the invention

[0003] The present invention aims at the disadvantages of non-integration, poor combination precision and the like in the prior art, and provides an integrated combined bearing and.

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

[0005] Combined bearing, including upper bearing and lower bearing,

[0006] The upper bearing comprises an upper bearing outer ring and an upper bearing inner ring, and the upper bearing outer ring and the upper bearing inner ring are matched;

[0007] One end of the inner ring of the upper bearing is an inner ring part, and the inner ring part cooperates with the outer ring of the upper bearing;

[0008] The lower bearing comprises a lower bearing outer ring and a lower bearing inner ring.

[0009] The other end of the upper bearing inner ring is a shaft, which passes through the lower bearing inner ring and is fixed by a locking sleeve. The locking sleeve is locked in the lower bearing inner ring, so that the upper bearing inner ring drives the shaft to rotate, and the shaft drives the lower bearing inner ring to rotate; the upper bearing outer ring is tightly matched with the lower bearing outer ring.

[0010] The inner ring of the upper bearing serves as both the inner ring of the bearing and the rotating shaft to connect the two sets of bearings, and the two sets of bearings are cleverly combined into one through a locking sleeve, eliminating the support of the bearing seat or other components, using fewer parts, reducing installation links, ensuring the inherent accuracy of the bearing, improving the combination accuracy, and effectively improving the stability of rotation.

[0011] Preferably, the locking sleeve includes a locking sleeve body and a cone arranged on one side of the locking sleeve body, the locking sleeve body and the cone form a central cylindrical hole at the center, a notch is opened in the circumferential direction of the locking sleeve, the notch is communicated with the central cylindrical hole, the shaft member passes through the central cylindrical hole and is clamped and fixed by the central cylindrical hole, and the outer periphery of the locking sleeve is locked to the inner hole wall of the inner ring of the lower bearing.

[0012] Preferably, the inner hole wall shape of the lower bearing inner ring matches the outer shape of the locking sleeve, the radial contact surface between the lower bearing inner ring and the outer periphery of the locking sleeve is the end surface, and the locking sleeve is locked on the end surface of the lower bearing inner ring.

[0013] The notch on the circumference of the locking sleeve can be formed by cutting. When locking, the notched central cylindrical hole has a certain tension, so that the shaft can be tightly held. When the central cylinder of the locking sleeve body embraces and holds the shaft of the upper bearing inner ring, the outer periphery of the cone and the inner conical hole of the lower bearing inner ring slowly fit with the taper until the locking sleeve body moves to the end face of the lower bearing ring and locks; the shaft is fixed by the locking sleeve when it is tightly held by the locking sleeve, and when the locking sleeve is locked to the lower bearing inner ring, the shaft is also locked (fixed) to the lower bearing inner ring. When disassembling, just remove the locking sleeve and slowly separate it using its taper. It makes installation and disassembly very simple.

[0014] Preferably, a first locking mounting hole is provided on the locking sleeve body, and a corresponding second locking mounting hole is provided on the inner ring of the lower bearing, and the first locking mounting hole is connected to the second locking mounting hole by a nut.

[0015] Preferably, the side edge of the upper bearing outer ring is provided with a first concave-convex step, and the side edge of the lower bearing outer ring is provided with a second concave-convex step, and the upper bearing outer ring and the lower bearing outer ring are tightly matched through the first concave-convex step and the second concave-convex step.

[0016] Fix the outer rings of the two bearings and rotate the screws on the locking sleeve at the same time to accurately eliminate the axial clearance of the bearings and ensure the accuracy of rotation. In addition, through the clamping structure, local parts can be replaced by just loosening the screws, which is convenient for maintenance.

[0017] Preferably, a rubber gasket is provided between the first concave-convex step of the upper bearing outer ring and the second concave-convex step of the lower bearing outer ring. The rubber gasket eliminates the gap between the upper bearing outer ring and the lower bearing outer ring due to its elastic material, and at the same time better adjusts the matching position between the upper bearing outer ring and the lower bearing outer ring.

[0018] Preferably, a groove is provided on the inner ring member, and the groove is used for placing the first steel ball.

[0019] The combined bearing with encoder includes an encoder component and the above-mentioned combined bearing, wherein the encoder component includes a code disc, a photoelectric component and a sensing component, wherein the code disc is mounted on the inner ring of the upper bearing, the sensing component is mounted on the inner bottom surface of the outer ring of the lower bearing, and the photoelectric component includes a light source, which illuminates the code disc, and the photoelectric component is connected to the sensing component circuit. The use of this integrated combined bearing ensures the accuracy of encoder rotation.

[0020] Preferably, a circumferential boss is provided on the outer periphery of the inner ring of the upper bearing, and the code disc is bonded below the circumferential boss.

[0021] Preferably, the optoelectronic component also includes an optoelectronic PCB board, the light source is placed on the back of the optoelectronic PCB board, a through hole is provided on the top surface of the outer ring of the upper bearing, the light source of the optoelectronic PCB board illuminates the code disk through the through hole, and the optoelectronic PCB board is threadedly connected to the outer ring of the upper bearing.

[0022] Preferably, the induction component includes an induction PCB board and a PCB board support column, the inner bottom surface of the lower bearing outer ring is provided with a PCB board mounting hole, and the induction PCB board is matched with the PCB board mounting hole through the PCB board support column, so as to achieve the effect of fine-tuning the position of the PCB board.

[0023] The code disc is bonded to the circumferential boss of the upper bearing inner ring and rotates coaxially with the inner ring, making it easy to install and replace. At the same time, the photoelectric PCB board and the sensor PCB board can be detachably installed on the upper bearing outer ring and the lower bearing inner ring respectively, which is convenient for assembly and disassembly. The outer ring is fixed and the inner ring rotates, making the encoder assembly flexible and organic, while effectively protecting the code disc.

[0024] Preferably, the upper bearing outer ring and the lower bearing outer ring form a wire outlet hole. The circuit structure is placed in the combined bearing, and the external circuit is connected through the smaller wire outlet hole, which does not affect the appearance of the bearing and the overall bearing design is compact.

[0025] According to the technical solution of the present invention, the combined bearing is integrated to reduce the installation links, ensure the inherent accuracy of the bearing, improve the combination accuracy, and effectively improve the stability of rotation. The processing links are reduced and materials are saved. The assembly and disassembly are convenient and maintenance is facilitated. At the same time, the bearing, PCB board, and code disk are integrated into one, which saves space and has a beautiful appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the existing combined bearing structure;

[0027] Figure 2 This is a schematic diagram of the structure of a combined bearing with an encoder in an embodiment;

[0028] Figure 3 An exploded view of a combined bearing in an embodiment;

[0029] Figure 4 An exploded view of a combined bearing with an encoder in an embodiment;

[0030] Figure 5 is a cross-sectional view of a combined bearing with an encoder in an embodiment;

[0031] Figure 6 Schematic diagram of the structure of the inner ring of the upper bearing in the embodiment;

[0032] Figure 7 It is a schematic diagram of the structure of the locking sleeve in the embodiment;

[0033] Figure 8 It is an axial cross-sectional view of the locking sleeve in the embodiment.

[0034] The parts indicated by the numbers in the accompanying drawings are as follows:

[0035] 1-upper bearing; 11-upper bearing outer ring; 12-upper bearing inner ring; 13-first sealing ring; 14-first retaining frame; 15-first steel ball; 16-second sealing ring; 111-first concave and convex platform; 112-through hole; 121-inner ring member; 122-shaft member; 123-circumferential boss; 1211-first circular shaft; 1212-second circular shaft;

[0036] 2-lower bearing; 21-lower bearing outer ring; 22-lower bearing outer ring; 23-third sealing ring; 24-second retaining frame; 25-second steel ball; 26-fourth sealing ring; 221-second locking mounting hole; 222-end face;

[0037] 3-locking sleeve; 31-cone; 32-center cylindrical hole; 33-notch; 34-first locking mounting hole; 35-screw hole;

[0038] 5-wire outlet hole; 6-encoder seat; 7-coaxial; 8-protective cover; 9-code disc support plate; 10-rubber gasket;

[0039] 41-photoelectric component; 42-code disc; 43-sensing component; 431-PCB board support column; DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-8 The present invention is further described in detail with specific embodiments:

[0041] Example 1

[0042] The combined bearing comprises an upper bearing 1 and a lower bearing 2. The upper bearing 1 comprises an upper bearing outer ring 11, an upper bearing inner ring 12, a first sealing ring 13, a first retaining frame 14, a first steel ball 15 and a second sealing ring 16. The first retaining frame 14 evenly separates the first steel balls 15 and places them in the grooves of the upper bearing outer ring 11 and the upper bearing inner ring 12.

[0043] One end of the upper bearing inner ring 12 is an inner ring part 121, which cooperates with the upper bearing outer ring 11; the lower bearing 2 includes a lower bearing outer ring 21, a lower bearing inner ring 22, a third sealing ring 23, a second retaining frame 24, a second steel ball 25 and a fourth sealing ring 26. The second retaining frame 24 evenly separates the second steel balls 25 and places them in the channels of the lower bearing outer ring 21 and the lower bearing inner ring 22. The inner ring part 121 actually acts as the inner ring of the bearing, and the channel of the upper bearing inner ring 12 is arranged on the inner ring part 121.

[0044] The other end of the upper bearing inner ring 12 is a shaft 122 which passes through the lower bearing inner ring 22 and is locked on the lower bearing inner ring 22 by a locking sleeve 3; the upper bearing outer ring 11 is tightly matched with the lower bearing outer ring 21.

[0045] In this embodiment, the locking sleeve 3 includes a locking sleeve body and a cone 31 arranged on one side of the locking sleeve body. The locking sleeve body and the center of the cone 31 form a central cylindrical hole 32. A notch 33 is opened in the circumferential direction of the locking sleeve 3. The notch 33 is communicated with the central cylindrical hole 32. The central cylindrical hole 32 holds the shaft member 12 of the upper bearing inner ring 12 to fix the shaft member 122. The outer periphery of the locking sleeve 3 is locked to the inner hole wall of the lower bearing inner ring 22.

[0046] The locking sleeve 3 is also provided with two threaded holes 35, and the threaded holes 35 are equipped with screws. The shaft 121 includes a first circular shaft 1211 and a second circular shaft 1212, the diameter of the first circular shaft is larger than the second circular shaft, and the height of the second circular shaft 1212 matches the thickness of the upper bearing inner ring 22, so that the shaft and the lower bearing inner ring 22 are appropriately matched in size.

[0047] During assembly, it is only necessary to assemble the upper bearing 1 and the lower bearing 2 separately, and then lock the shaft 121 of the upper bearing inner ring 12 in the lower bearing inner ring through the locking sleeve 3 to form an integrated combined bearing. When replacing parts or disassembling, it is only necessary to push open the two screws on the two threaded holes on the locking sleeve 3 to separate them.

[0048] Example 2

[0049] The structure of the combined bearing is based on that of Example 1, wherein the inner hole wall shape of the lower bearing inner ring 22 matches the outer shape of the locking sleeve 3, the radial contact surface between the lower bearing inner ring 22 and the outer periphery of the locking sleeve 3 is the end face 222, and the locking sleeve 3 is locked on the end face 222 of the lower bearing inner ring 22.

[0050] Example 3

[0051] The structure of the combined bearing is based on that of Example 1, a first locking mounting hole 34 is provided on the locking sleeve, a corresponding second locking mounting hole 221 is provided on the lower bearing inner ring 22, and the first locking mounting hole 34 is connected to the second locking mounting hole 221 by a nut.

[0052] The side edge of the upper bearing outer ring is provided with a first concavoconvex step 111, and the side edge of the lower bearing outer ring is provided with a second concavoconvex step 211. The upper bearing outer ring 11 and the lower bearing outer ring 21 are tightly matched through the first concavoconvex step 111 and the second concavoconvex step 211, and the concavoconvex matching is tightened. A rubber gasket 10 is provided between the first concavoconvex step 111 of the upper bearing outer ring and the second concavoconvex step 211 of the lower bearing outer ring.

[0053] The locking sleeve is further tightened to the lower bearing inner ring through the external nut. At the same time, the concave and convex steps of the upper bearing outer ring 11 and the lower bearing outer ring 21 cooperate to accurately eliminate the axial clearance of the bearing and ensure the rotation accuracy. At the same time, a rubber gasket 10 is added. The soft and elastic material of the rubber gasket eliminates the gap between the upper bearing outer ring and the lower bearing outer ring, and better adjusts the matching position between the upper bearing outer ring and the lower bearing outer ring.

[0054] Example 4

[0055] The combined bearing with an encoder includes the combined bearing in the above embodiment and an encoder component. The encoder component includes a code disk 42, a photoelectric component 41 and a sensing component 43. The code disk 42 is installed on the upper bearing inner ring 12, and the sensing component 43 is installed on the inner bottom surface of the lower bearing outer ring 21. The photoelectric component includes a light source and illuminates the code disk 42. The photoelectric component 41 is connected to the sensing component circuit.

[0056] Example 5

[0057] The combined bearing with encoder is based on the embodiment 4, and the outer circumference of the inner ring 12 of the upper bearing is provided with a circumferential boss 123, and the code disc 42 is bonded below the circumferential boss 123. The photoelectric component 41 also includes a photoelectric PCB board, and the light source is placed on the back of the photoelectric PCB board. The light source in this embodiment is an LED lamp. A through hole 112 is provided on the top surface of the upper bearing outer ring 11. The light source of the photoelectric PCB board 41 irradiates the code disc 42 through the through hole 112, and the photoelectric PCB board 41 is threadedly connected with the upper bearing outer ring 11. The induction component 43 includes an induction PCB board, an inductor, and a PCB board support column 431. The inner bottom surface of the lower bearing outer ring 21 is provided with a PCB board mounting hole, and the induction PCB board cooperates with the PCB board mounting hole through the PCB board support column 431. The upper bearing outer ring 11 and the lower bearing outer ring 21 form a wire outlet hole 5. The circuits are placed inside the bearing for protection and aesthetics.

[0058] In addition, for the sake of aesthetics and concealment, a mounting notch can be provided on one side of the top surface of the upper bearing outer ring 11, and the optoelectronic component 41 is placed in the mounting notch and connected by threads for easy disassembly and assembly.

[0059] The encoder assembly is installed on the bearing component, and the integration of the combined bearing is utilized to realize the integration of the encoder, which is easy to install, disassemble, repair and replace. At the same time, the upper and lower bearing outer rings well combine the encoder assembly with the inside and outside of the combined bearing. At the same time, the relevant circuits are not exposed to the outside, and the circuits are only led out through the outlet hole 5 for relevant circuit connection. The arrangement is compact, neat and beautiful.

[0060] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. Combined bearing with encoder, characterized in that: Includes combined bearing and encoder assembly, The combined bearing comprises an upper bearing (1) and a lower bearing (2). The upper bearing (1) comprises an upper bearing outer ring (11) and an upper bearing inner ring (12), and the upper bearing outer ring (11) and the upper bearing inner ring (12) are matched; One end of the upper bearing inner ring (12) is an inner ring member (121), and the inner ring member (121) cooperates with the upper bearing outer ring (11); The lower bearing (2) comprises a lower bearing outer ring (21) and a lower bearing inner ring (22), and the lower bearing outer ring (21) and the lower bearing inner ring (22) are matched; The other end of the upper bearing inner ring (12) is a shaft member (122), the shaft member (122) passes through the lower bearing inner ring (22) and is fixed by a locking sleeve (3), the locking sleeve (3) is locked in the lower bearing inner ring (22), so that the upper bearing inner ring (12) drives the shaft member (122) to rotate, and the shaft member (122) drives the lower bearing inner ring (22) to rotate; The upper bearing outer ring (11) and the lower bearing outer ring (21) are tightly matched; The encoder assembly comprises a code disc (42), a photoelectric assembly (41) and a sensing assembly (43). The code disc (42) is mounted on the inner ring (12) of the upper bearing, and the sensing assembly (43) is mounted on the inner bottom surface of the outer ring (21) of the lower bearing. The photoelectric assembly comprises a light source, which illuminates the code disc (42). The photoelectric assembly (41) is connected to the sensing assembly circuit.

2. The combined bearing with encoder according to claim 1, characterized in that: A circumferential boss (123) is provided on the outer periphery of the upper bearing inner ring (12), and the code disc (42) is bonded below the circumferential boss (123).

3. The combined bearing with encoder according to claim 1, characterized in that: The photoelectric component (41) also includes a photoelectric PCB board, a light source is arranged on the back of the photoelectric PCB board, a through hole (112) is arranged on the top surface of the upper bearing outer ring (11), the light source of the photoelectric PCB board illuminates the code disk (42) through the through hole (112), and the photoelectric PCB board is threadedly connected to the upper bearing outer ring (11).

4. The combined bearing with encoder according to claim 1, characterized in that: The sensing component (43) comprises a sensing PCB board and a PCB board support column (431); a PCB board mounting hole is provided on the inner bottom surface of the lower bearing outer ring (21); and the sensing PCB board cooperates with the PCB board mounting hole through the PCB board support column (431).

5. The combined bearing with encoder according to claim 1, characterized in that: The upper bearing outer ring (11) and the lower bearing outer ring (21) form a wire outlet hole (5).

6. The combined bearing with encoder according to claim 1, characterized in that: The locking sleeve (3) comprises a locking sleeve body and a cone (31) arranged on one side of the locking sleeve body. The locking sleeve body and the cone (31) form a central cylindrical hole (32) at the center. A notch (33) is provided in the circumferential direction of the locking sleeve (3). The notch (33) communicates with the central cylindrical hole (32). The shaft (122) penetrates into the central cylindrical hole (32) and is held and fixed by the central cylindrical hole (32). The outer periphery of the locking sleeve (3) is locked to the inner hole wall of the lower bearing inner ring (22).

7. The combined bearing with encoder according to claim 6, characterized in that: The shape of the inner hole wall of the lower bearing inner ring (22) matches the outer shape of the locking sleeve (3); the radial contact surface between the lower bearing inner ring (22) and the outer periphery of the locking sleeve (3) is the end surface (222); and the locking sleeve (3) is locked on the end surface (222) of the lower bearing inner ring (22).

8. The combined bearing with encoder according to claim 6, characterized in that: A first locking mounting hole (34) is provided on the locking sleeve body, and a corresponding second locking mounting hole (221) is provided on the lower bearing inner ring (22). The first locking mounting hole (34) and the second locking mounting hole (221) are connected via a nut to tighten the degree of clamping between the locking sleeve (3) and the shaft member (122).

9. The combined bearing with encoder according to claim 8, characterized in that: A first concave-convex step (111) is provided on the side edge of the upper bearing outer ring, and a second concave-convex step (211) is provided on the side edge of the lower bearing outer ring. The upper bearing outer ring (11) and the lower bearing outer ring (21) are tightly matched via the first concave-convex step (111) and the second concave-convex step (211).

10. The combined bearing with encoder according to claim 9, characterized in that: A rubber gasket (10) is provided between the first concave-convex step (111) of the upper bearing outer ring and the second concave-convex step (211) of the lower bearing outer ring.

11. The combined bearing with encoder according to claim 1, characterized in that: The inner ring member (121) is provided with a groove, and the groove is used to place the first steel ball (15).

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