A double-row crossed cylindrical roller bearing structure with inner teeth

Abstract

The application discloses a kind of inner tooth double-row crossed cylindrical roller bearing structure, relating to double-row crossed cylindrical roller structure bearing technical field, including outer ring, inner ring and cylindrical roller, cylindrical roller is arranged in square raceway between outer ring and inner ring, disc type time grid measurement system is equipped on the upper end face of outer ring and inner ring, disc type time grid measurement system is time grid angular displacement sensor, including upper and lower parallel and coaxial stator induction disc and rotor time grid ruler, rotor time grid ruler is in disc-like structure, is fixed on the recessed step surface of inner ring outer end face by mounting screw, stator induction disc is fixed on the recessed step surface on outer ring outer end face by mounting screw, rotor time grid ruler and stator induction disc are arranged in correspondence with up and down, and 0.30±0.05mm clearance is left, signal output cable is equipped on stator induction disc;The application is installed on bearing by disc time grid measurement system, need not be reserved installation position on equipment, saves installation space and reduces production cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of double-row crossed cylindrical roller structure bearing, in particular to an inner tooth double-row crossed cylindrical roller bearing structure. BACKGROUND

[0002] It is known that the inner ring and outer ring of the double-row crossed cylindrical roller adopts an integrated structure, and since the rolling surface is double-rowed and small-diameter rollers are used, the number of rollers is about 5 times that of the traditional crossed cylindrical roller structure bearing under the condition of the same inner and outer diameter size, which reduces the friction torque of the bearing while maintaining compactness, improving rigidity and precision; for high-precision tool machine equipment, the commonly used methods for measuring angular displacement are optical grating encoders, magnetic grating encoders and steel grating encoders, and the encoder is integrated with the bearing to be directly used in the terminal equipment, and the steel grating encoder is currently mainly used, but the installation of the grating ruler of the steel grating encoder needs to be matched with the bearing by using special instruments, which is troublesome and requires high operating skills; the reading head of the steel grating encoder is fixed on the bearing by two screws, and the gap adjustment between the reading head and the grating ruler is difficult to ensure consistency, and the position of the reading head is prone to shift after the machine is used for a long time, thereby causing the feedback accuracy of the encoder to deteriorate. SUMMARY

[0003] In order to overcome the deficiencies in the background art, the present application discloses an inner tooth double-row crossed cylindrical roller bearing structure.

[0004] In order to achieve the object of the application, the present application adopts the following technical scheme:

[0005] An inner tooth double-row crossed cylindrical roller bearing structure, comprising an outer ring, an inner ring and cylindrical rollers, the cylindrical rollers are arranged in a cross shape in the square raceway between the outer ring and the inner ring; a disc type time grating measurement system is arranged on the upper end face of the outer ring and the inner ring, the disc type time grating measurement system is a time grating angular displacement sensor, comprising a stator induction disc and a rotor time grating ruler arranged in parallel and coaxially, the rotor time grating ruler is in a disc structure and is fixed on the recessed step surface of the outer end face of the inner ring by mounting screws, the stator induction disc is fixed on the recessed step surface of the outer end face of the outer ring by mounting screws, the rotor time grating ruler and the stator induction disc are arranged in correspondence with each other in an up-down manner and have a gap of 0.30±0.05mm, and a signal output cable is arranged on the stator induction disc.

[0006] The inner tooth double-row crossed cylindrical roller bearing structure, the stator induction disc comprises a stator base body and an excitation winding wound on the stator base body, and the rotor time grating ruler comprises a rotor base body and an induction winding wound on the rotor base body.

[0007] The inner tooth type double-row cross cylindrical roller bearing structure has two outer ring raceways and two inner ring raceways, and the two outer ring raceways and the two inner ring raceways correspond to each other and form two square raceways for placing cylindrical rollers.

[0008] The outer end face of the outer ring and the outer end face of the inner ring are provided with a ring of mounting holes, and the mounting holes are connected to the main machine through connecting bolts.

[0009] The outer end face of the stator induction disc is flush with the outer end face of the outer ring.

[0010] The inner end face of the inner ring is provided with inner teeth.

[0011] The signal output cable is connected to an external industrial computer.

[0012] Due to the adoption of the above technical scheme, the present application has the following beneficial effects:

[0013] 1. The inner tooth type double-row cross cylindrical roller bearing structure of the present application is provided with a circular time grating measurement system, and no installation position needs to be reserved on the equipment, thereby saving installation space and reducing production cost, without affecting the rotation speed of the bearing and with pre-loaded bearing before leaving the factory, so that the bearing can still bear radial force, axial force and overturning moment under high rotation speed, and the main machine is developed towards the direction of high efficiency, energy saving and compounding.

[0014] 2. The outer ring and the inner ring of the inner tooth type double-row cross cylindrical roller bearing structure are provided with mounting holes, and the main machine is directly connected through connecting bolts, and the corresponding bearing seat, gland and the like do not need to be designed, which is convenient for use of the main machine factory and simplifies the design structure of the main machine.

[0015] 3. The inner tooth type double-row cross cylindrical roller bearing structure is suitable for an operating environment of -40℃ to 80℃, can effectively resist impact and vibration, and can be installed and used in the case of dust, oil stains and cooling liquid. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present application.

[0017] In the figure: 1, outer ring; 2, inner ring; 3, plug; 4, conical pin; 5, cylindrical roller; 6, disc type time grid measurement system; 7, signal output cable; 8, inner tooth; 9, mounting screw; 10, stator induction disc; 11, rotor time grid ruler. DETAILED DESCRIPTION

[0018] The present application can be explained in detail by the following examples, and the purpose of the disclosure is to protect all technical improvements within the scope of the present application.

[0019] The accompanying drawings are referred to in conjunction with Figure 1 The inner tooth type double row crossed cylindrical roller bearing structure comprises an outer ring 1, an inner ring 2, and a cylindrical roller 5, and the cylindrical rollers 5 are arranged in a crossed manner in the square-shaped raceway between the outer ring 1 and the inner ring 2; a disc type time grid measurement system 6 is arranged on the upper end face of the outer ring 1 and the inner ring 2, the disc type time grid measurement system 6 is a time grid angular displacement sensor, and comprises a stator induction disc 10 and a rotor time grid ruler 11 arranged in parallel and coaxially, the rotor time grid ruler 11 is in a disc-shaped structure, is fixed on the recessed step surface of the outer end face of the inner ring 2 through a mounting screw 9, the stator induction disc 10 is fixed on the recessed step surface of the outer end face of the outer ring 1 through a mounting screw 9, the rotor time grid ruler 11 and the stator induction disc 10 are arranged in correspondence with each other in an up-down manner, and a gap of 0.30±0.05 mm is left, and a signal output cable 7 is arranged on the stator induction disc 10.

[0020] Further, the stator induction disc 10 comprises a stator base body and an excitation winding wound on the stator base body, and the rotor time grid ruler 11 comprises a rotor base body and an induction winding wound on the rotor base body.

[0021] Further, two outer ring raceways are formed on the inner circular face of the outer ring 1, the inner ring 2 is provided with inner teeth 8 on the inner circular face, two inner ring raceways are formed on the outer face of the inner ring 2, the two outer ring raceways and the two inner ring raceways correspond to each other in an up-down manner and form two square-shaped raceways for placing the cylindrical rollers 5, the cylindrical rollers 5 are arranged in a crossed manner in the square-shaped raceways corresponding to the outer ring raceways and the inner ring raceways, radial plug holes are formed on the corresponding outer diameters of the two outer ring raceways, the two plug holes respectively communicate with the two outer ring raceways, radial plugs 3 are arranged in the plug holes, pin holes vertically communicating with the plug holes are respectively arranged on the end face of the outer ring, and conical pins 4 are arranged in the pin holes.

[0022] Further, a ring of mounting holes is arranged on the outer end face of the outer ring 1 and the inner ring 2, and the mounting holes are fixed to the main machine through connecting bolts.

[0023] Further, the signal output cable 7 is connected with the external industrial computer, the digital signal collected by induction is transmitted to the signal processing unit in the industrial computer through the signal output cable 7, and the measurement and control of the angular displacement are realized through signal processing.

[0024] The inner tooth double-row cross cylindrical roller bearing structure is implemented, two outer ring raceways are formed on the inner circular surface of the outer ring 1, the inner teeth 8 are arranged on the inner circular surface of the inner ring 2, the cylindrical rollers 5 are cross arranged in the square raceways between the corresponding outer ring raceways and inner ring raceways, the radial plug holes are formed on the corresponding outer diameters of the two outer ring raceways, the two plug holes are communicated with the two outer ring raceways respectively, the radial plugs 3 are installed in the plug holes, the pin holes are formed on the end surfaces of the outer ring and communicated with the plug holes perpendicularly, the conical pins 4 are installed in the pin holes, when installed, the outer ring 1 and the inner ring 2 are directly fixed and connected with the main machine through the mounting holes on the outer end surfaces of the outer ring 1 and the inner ring 2, the disc type time grid measurement system 6 arranged on the outer end surfaces of the outer ring 1 and the inner ring 2 collects signals, the signal output cable 7 is connected with the external industrial computer, and the signal processing unit in the industrial computer realizes the measurement and control of the angular displacement.

[0025] The part not described in the application is the prior art.

[0026] The examples selected in the text for disclosing the inventive purpose of the application are currently considered appropriate, but it should be understood that the application is intended to include all changes and improvements that belong to the scope of the present concept and invention.

Claims

1. A double-row crossed cylindrical roller bearing structure with inner teeth, comprising an outer ring, an inner ring and cylindrical rollers, the cylindrical rollers being arranged in a crossed pattern in square-shaped raceways between the outer ring and the inner ring, characterized in that: The inner circle is provided with inner teeth, and a disc type time grating measurement system is arranged on the upper end surface of the outer circle and the inner circle. The disc type time grating measurement system is a time grating angular displacement sensor, which comprises a stator induction disc and a rotor time grating ruler arranged in parallel and coaxially. The rotor time grating ruler is in a disc structure and is fixed on the recessed step surface of the outer end surface of the inner circle through mounting screws. The stator induction disc is fixed on the recessed step surface of the outer end surface of the outer circle through mounting screws. The rotor time grating ruler and the stator induction disc are arranged in correspondence and leave a gap of 0.30±0.05mm. A signal output cable is arranged on the stator induction disc. The stator induction disc comprises a stator base body and an excitation winding wound on the stator base body. The rotor time grating ruler comprises a rotor base body and an induction winding wound on the rotor base body. The outer end surface of the stator induction disc is arranged in flush with the outer end surface of the outer circle. A circle of mounting holes are arranged on the outer end surfaces of the outer circle and the inner circle, and the main machine is fixed through connecting bolts in the mounting holes.

2. The double-row crossed cylindrical roller bearing structure with inner teeth according to claim 1, characterized in that: Two outer circle raceways are arranged on the inner circular surface of the outer circle, and two inner circle raceways are arranged on the outer surface of the inner circle. The two outer circle raceways and the two inner circle raceways correspond to each other and form two square-shaped raceways for placing cylindrical rollers. The cylindrical rollers are arranged in the square-shaped raceways corresponding to the outer circle raceways and the inner circle raceways in a cross arrangement. Radial plug holes are arranged on the corresponding outer diameters of the two outer circle raceways, and the two plug holes are communicated with the two outer circle raceways respectively. Radial plugs are arranged in the plug holes. Pin holes perpendicular to the plug holes are arranged on the end surface of the outer circle, and conical pins are arranged in the pin holes.

3. The double-row crossed cylindrical roller bearing structure with inner teeth according to claim 1, characterized in that: The signal output cable is connected with an external industrial computer.

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