Load tool for detecting axial clearance of small and medium-sized double-row tapered roller bearing
By designing a load fixture with a detachable and combined gland and mandrel structure, the problems of long processing cycles and high costs caused by special load fixtures in the axial clearance detection of small and medium-sized double-row tapered roller bearings are solved, achieving more efficient detection and cost control.
Patent Information
- Application Number
- CN202422939884.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-29
AI Technical Summary
In the prior art, each time the axial clearance of small and medium-sized double-row tapered roller bearings is tested, a special load tooling needs to be customized, which results in a long processing cycle and high costs, and is not conducive to cost control.
A detachable and combined gland and mandrel structure is designed, and the universality of the load tooling is achieved through bolt connection. The mandrel diameter is designed according to the inner diameter of the bearing, and the length is set according to the load size. The gland is a universal part, and the bolt connection facilitates installation and disassembly.
The versatility and processing efficiency of the load tooling are improved, the manufacturing time is shortened, and the processing cost is reduced.
Smart Images
Figure CN223361421U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearing measurement, in particular to a load tooling for detecting the axial clearance of small and medium-sized double-row tapered roller bearings. Background Art
[0002] Double-row tapered roller bearings have axial clearance requirements in their product designs. Clearance is actually the gap between the rolling elements and the inner and outer raceways, and is divided into axial clearance Ga and radial clearance Gr. Some OEMs explicitly require axial clearance for double-row cylindrical roller bearings. Bearing manufacturers typically test axial clearance by applying a dedicated load to the bearing end faces and rotating the load to ensure full contact between the bearings and eliminate the unique self-locking phenomenon of tapered roller bearings. Testing is then performed based on the process range of the axial clearance.
[0003] At present, for double-row tapered roller bearings with axial clearance requirements, a dedicated load fixture for axial clearance testing needs to be designed before each axial clearance test. Since the load fixture has weight requirements and is generally large in size, each time the load fixture is processed, not only is the processing cycle long, but it also incurs high processing costs, which is undoubtedly not conducive to reducing processing costs. Utility Model Content
[0004] The purpose of the utility model is to provide a load tooling for detecting the axial clearance of small and medium-sized double-row tapered roller bearings, which is used to solve the problem that for double-row tapered roller bearings with axial clearance requirements, a special load tooling needs to be customized before each detection. Due to its large size and specific weight, the processing cycle is long and the cost is high, which is not conducive to cost control.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a load tool for detecting the axial clearance of small and medium-sized double-row tapered roller bearings, comprising a pressure cover, a core shaft arranged on the lower side of the pressure cover, and a bolt threadedly engaged with the pressure cover and the core shaft; the pressure cover comprises a cover body, a positioning slot arranged in the middle of the lower side of the cover body, and a second threaded hole arranged on the upper side of the inner part of the positioning slot; the core shaft comprises a positioning core, a positioning pin arranged on the upper side of the positioning core and plugged into the positioning slot, a recessed hole arranged on the lower side of the positioning core, and a third threaded hole arranged on the upper side of the positioning pin and connected to the recessed hole, and the positioning pin and the positioning core are formed as one piece; one end of the bolt is threadedly engaged with the third threaded hole and the second threaded hole, and the head of the bolt is located inside the recessed hole.
[0006] Furthermore, the outer wall surface of the cover body is provided with a plurality of first threaded holes spaced apart along the circumferential direction.
[0007] Furthermore, a cavity is provided on the top of the inner wall of the positioning slot.
[0008] Furthermore, a bevel boss is provided in the middle portion of the upper side of the cover body, and the bevel boss and the cover body are formed as one piece.
[0009] Furthermore, a groove is provided in the middle portion of the upper side of the inclined boss.
[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0011] The utility model aims at detecting the axial clearance of small and medium-sized double-row tapered roller bearings and innovates the design of the traditional load tooling. Originally, the load tooling adopted an integrated structure of the gland and the core shaft, but now it has been transformed into a detachable combined gland and core shaft structure connected by bolts. The improved load tooling not only improves the versatility of the load tooling in detecting bearings of different specifications in the same series, but also shortens the time in the processing and manufacturing process and reduces the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a cross-sectional schematic diagram of a load fixture for detecting axial clearance of small and medium-sized double-row tapered roller bearings according to the present invention;
[0013] Figure 2 This is a schematic structural diagram of a load fixture for detecting axial clearance of small and medium-sized double-row tapered roller bearings according to the present invention;
[0014] Figure 3 The utility model is a schematic structural diagram of a load fixture for detecting the axial clearance of small and medium-sized double-row tapered roller bearings.
[0015] In the figure: 1. Pressure cap; 2. Core shaft; 3. Cover body; 4. First threaded hole; 5. Second threaded hole; 6. Positioning pin; 7. Cavity; 8. Inclined boss; 9. Groove; 10. Positioning core; 11. Concave hole; 12. Third threaded hole; 13. Bolt; 14. Positioning slot. DETAILED DESCRIPTION
[0016] See also Figure 1-3, a load tool for detecting the axial clearance of small and medium-sized double-row tapered roller bearings, comprising a pressure cover 1, a core shaft 2 arranged at the lower side of the pressure cover 1, and a bolt 13 threadedly matched with the pressure cover 1 and the core shaft 2; the pressure cover 1 comprises a cover body 3, a positioning slot 14 arranged in the middle of the lower side of the cover body 3, and a second threaded hole 5 arranged on the upper side of the positioning slot 14; the core shaft 2 comprises a positioning core 10, a positioning pin 6 connected to the upper side of the positioning core 10 and plugged into the positioning slot 14, a recessed hole 11 arranged at the lower side of the positioning core 10, and a third threaded hole 12 arranged on the upper side of the positioning pin 6 and connected to the recessed hole 11, the positioning pin 6 and the positioning core 10 are formed as one piece; the plug-in cooperation of the positioning slot 14 and the positioning pin 6 realizes the positioning effect when the core shaft 2 is connected to the pressure cover 1; one end of the bolt 13 is threadedly matched with the third threaded hole 12 and the second threaded hole 5, and the head of the bolt 13 is located inside the recessed hole 11; the load tooling holds the pressure cover 1 and the core shaft 2 are separated. According to the load requirements and the inner diameter size of the bearing required for each test, it is only necessary to design the core shaft 2 specifically each time. The diameter of the core shaft 2 is designed according to the inner diameter of the bearing to be tested, and its length is set according to the size of the load. The load cover 1 adopts a universal part. After processing, the special load core shaft 2 and the load cover 1 are tightly connected with the bolt 13. During the specific installation, first, the positioning pin 6 on the core shaft 2 adapted to the bearing to be tested is inserted into the positioning slot 14 on the lower side of the cover 1, and then the bolt 13 is tightened into the third threaded hole 12 and the second threaded hole 5 in turn. The head of the bolt 13 is embedded in the inside of the recessed hole 11 to complete the connection between the cover 1 and the core shaft 2; the load tooling is improved for the axial clearance detection of double-row tapered roller bearings of the same series but different specifications. The versatility of the load tooling is increased after the improvement, and the processing time and processing cost are reduced when the load tooling is processed and manufactured.
[0017] The outer wall surface of the cover body 3 is provided with a plurality of first threaded holes 4 spaced apart along the circumferential direction; by screwing connecting bolts into the plurality of first threaded holes 4, these connecting bolts are easy to hold, so that the tester can easily install or remove the entire load tooling from the bearing, thereby improving work efficiency.
[0018] A cavity 7 is provided on the top of the inner wall of the positioning slot 14 ; the cavity 7 prevents the positioning pin 6 from interfering with the positioning slot 14 during insertion into the positioning slot 14 , thereby improving the accuracy and efficiency of tooling installation.
[0019] An inclined boss 8 is provided in the middle of the upper side of the cover body 3 , and the inclined boss 8 and the cover body 3 are formed as one piece; the inclined boss 8 reduces the difficulty of processing the pressure cover 1 .
[0020] A groove 9 is provided in the middle of the upper side of the inclined boss 8; the groove 9 facilitates the measurement of the dial indicator, ensures the repeatability and consistency of the measurement, and ensures that it is aligned with the axial center line of the bearing and tooling, which not only improves the accuracy and reliability of the measurement, but also simplifies the alignment steps in the measurement process and improves work efficiency.
[0021] Working principle: The load fixture separates the gland 1 and the core shaft 2. According to the load requirements and the inner diameter of the bearing required for each test, only the core shaft 2 needs to be specially designed each time. The diameter of the core shaft 2 is designed according to the inner diameter of the bearing to be tested, and its length is set according to the size of the load. The load gland 1 adopts a universal part. After processing, the dedicated load core shaft 2 and the load gland 1 are tightly connected with bolts 13. During the specific installation, first, insert the positioning pin 6 on the core shaft 2 that is adapted to the bearing to be tested into the positioning slot 14 on the lower side of the gland 1, and then screw The bolt 13 is screwed into the third threaded hole 12 and the second threaded hole 5 in sequence, and the head of the bolt 13 is embedded in the inside of the recessed hole 11 to complete the connection between the gland 1 and the core shaft 2; the connecting bolts are screwed into the multiple first threaded holes 4, and these connecting bolts are easy to hold, so that the tester can easily install or remove the entire load fixture from the bearing; the load fixture is improved for detecting the axial clearance of double-row tapered roller bearings of the same series but different specifications. The versatility of the load fixture is increased after improvement, and the processing time and processing cost are reduced when the load fixture is processed and manufactured.
[0022] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A load fixture for detecting the axial clearance of small and medium-sized double-row tapered roller bearings, characterized in that: The invention comprises a pressure cover (1), a core shaft (2) provided on the lower side of the pressure cover (1), and a bolt (13) threadedly matched with the pressure cover (1) and the core shaft (2); the pressure cover (1) comprises a cover body (3), a positioning slot (14) provided in the middle of the lower side of the cover body (3), and a second threaded hole (5) provided on the upper side of the positioning slot (14); the core shaft (2) comprises a positioning core (10), a positioning pin (6) provided on the upper side of the positioning core (10) and plugged into the positioning slot (14), a recessed hole (11) provided on the lower side of the positioning core (10), and a third threaded hole (12) provided on the upper side of the positioning pin (6) and connected to the recessed hole (11), wherein the positioning pin (6) and the positioning core (10) are integrally formed; one end of the bolt (13) is threadedly matched with the third threaded hole (12) and the second threaded hole (5), and the head of the bolt (13) is located inside the recessed hole (11).
2. A load fixture for detecting axial clearance of small and medium-sized double-row tapered roller bearings according to claim 1, characterized in that: The outer wall surface of the cover body (3) is provided with a plurality of first threaded holes (4) arranged at intervals along the circumferential direction.
3. A load fixture for detecting axial clearance of small and medium-sized double-row tapered roller bearings according to claim 1, characterized in that: A cavity (7) is provided on the top of the inner wall of the positioning slot (14).
4. A load fixture for detecting axial clearance of small and medium-sized double-row tapered roller bearings according to claim 1, characterized in that: A bevel boss (8) is provided in the middle of the upper side of the cover body (3); the bevel boss (8) and the cover body (3) are integrally formed.
5. A load fixture for detecting axial clearance of small and medium-sized double-row tapered roller bearings according to claim 4, characterized in that: A groove (9) is provided in the middle of the upper side of the inclined boss (8).