A composite loading device for bearing testing machine

Abstract

The present invention discloses a composite loading device for a bearing testing machine, including an axial loading device, a tipping loading device, an ejector positioning device and a loading base. The axial loading device is located on the upper side of the tipping loading device, and is used to apply loads in both tensile and compressive directions to the tested bearing shaft; the tipping loading device is located in the middle position, and can apply a bidirectional tipping load to the tested bearing shaft; the ejector positioning device is located on the lower side of the tipping loading device, and is used to support the bearing test fixture to increase the axial stiffness of the axial rotating part; the loading base is located above the frame, and is used to install the loading part, the tipping loading device and the ejector positioning device. The present invention is a special loading device for bearing composite testing equipment, specifically a composite device used for loading the test bearing in the axial and tipping directions during bearing testing, and when two loads are applied to the test bearing, the bearing can only bear the tipping load and the axial load.

Description

Technical Field

[0001] The invention belongs to the field of bearing testing machines, and relates to a composite rolling bearing life testing machine, in particular to a composite device for axial and overturning loading for bearing testing. Background Art

[0002] Rolling bearings are one of the most widely used mechanical parts, and are also one of the most easily damaged components in mechanical equipment. Especially rolling bearings under high-speed and heavy-load conditions are prone to fatigue, cracks, erosion, indentation and other faults due to the long-term and repeated action of the contact stress on the working surface, which can cause bearing breakage, adhesion, burning and other phenomena, and further cause abnormalities in the entire equipment.

[0003] Therefore, conducting a life test on rolling bearings before they leave the factory can not only improve the production process of bearings, but also guide the timely replacement of bearings used on equipment. At present, there are few bearing testing equipment for bearing life testing that can simultaneously meet axial loading, overturning loading and radial loading, and can withstand high-speed and heavy-load conditions. The present invention is a special loading device for the composite testing equipment, specifically a composite device for loading the test bearing in the axial and overturning directions during bearing testing. The present invention can be combined with a special fixture for bearing testing to perform bearing life testing, which can effectively avoid the overturning moment acting on the axial loading device when overturning loading is performed, so that the bearing only bears the overturning load or the axial load, and the axial load application part does not bear the overturning moment. Summary of the invention

[0004] The object of the present invention is to provide a loading device which is convenient for loading and suitable for the overturning or axial direction of a composite testing bearing machine tool.

[0005] The purpose and conception of the present invention are achieved through the following technical solutions:

[0006] A composite loading device for a bearing testing machine comprises an axial loading device, a tipping loading device, a thimble positioning device and a loading base, wherein the axial loading device is located on the upper side of the tipping loading device and is used to apply an axial load to the tested bearing shaft; the tipping loading device is arranged at the middle position of the entire device and is used to apply tipping loads in both tensile and compressive directions to the tested bearing; the thimble positioning device is arranged on the lower side of the tipping loading device and is used to support a bearing testing tool to increase the axial rotational stiffness of the bearing testing tool; the loading base is arranged above the frame and is used to install the loading part, the tipping loading device and the thimble positioning device, and the loading base locking bolt arranged above the loading base is a T-bolt, which can cooperate with the T-slot arranged above the frame to fix the loading base.

[0007] Furthermore, a dovetail block is provided above the loading base for guiding the axial loading device, the overturning loading device and the ejector positioning device; a guide V-shaped groove is provided at the bottom of the loading base for positioning the entire axial and overturning loading devices.

[0008] Furthermore, a V-shaped groove is provided at the bottom of the loading base, which can cooperate with the circular guide rail to improve the axial positioning accuracy.

[0009] Furthermore, the axial loading device includes: an axial loading cylinder, an axial loading seat, an axial loading seat locking bolt, an axial pressure sensor, a rear push plate, an axial loading rod wear-resistant sleeve, a guide seat, an axial loading rod, a bidirectional loading connecting bolt, a guide column and a front push plate. The above-mentioned axial loading cylinder is installed on the axial loading seat through a locking bolt, and the axial loading seat is fixed to the loading base through the axial loading seat locking bolt. The axial loading seat is provided with a dovetail groove structure that cooperates with the loading base. The output rod of the axial loading cylinder is connected to the axial pressure sensor arranged on the rear push plate, and one end of the axial loading rod is connected to the rear push plate. The guide post is arranged on the front push plate, and cooperates with the guide hole on the test bearing mounting fixture for axial positioning. The contact surface between the front push plate and the test bearing mounting fixture is an arc surface, which can prevent the axial loading device from bearing part of the overturning load when the axial load and the overturning load are applied to the test bearing mounting fixture at the same time, and only makes the tested bearing bear two loads.

[0010] Furthermore, the axial loading rods can be provided in 4, 6 or 8 numbers according to actual needs; and the bidirectional loading connecting bolts can be provided in 8, 10 or 12 numbers on the end face of the front push plate.

[0011] Furthermore, the overturning loading device includes: an overturning loading cylinder, an overturning pressure sensor, a connecting sleeve, an overturning loading shaft, an overturning wear-resistant sleeve and an overturning loading sleeve. The above-mentioned overturning loading cylinder is fixed to the axial loading seat by a locking bolt, the telescopic rod of the overturning loading cylinder is connected to the overturning pressure sensor installed on the connecting sleeve, one end of the overturning loading shaft is connected to the connecting sleeve, and the other end is connected to the test bearing mounting tooling to apply overturning loads in both tensile and compressive directions. The overturning loading sleeve is installed in the guide seat by interference fit, and a set of overturning wear-resistant sleeves are respectively installed at both ends of the overturning loading sleeve. The overturning wear-resistant sleeves cooperate with the overturning loading shaft to enable the overturning loading shaft to move freely forward and backward.

[0012] Furthermore, the ejector positioning device comprises: an advance and retreat handwheel, a handwheel mounting seat, a screw support bearing, a handwheel mounting seat fixing bolt, a feed screw, a screw sleeve, a guide seat, an ejector sleeve, an ejector assembly, a locking bolt, a dovetail base plate and a connecting bolt. The above-mentioned handwheel mounting seat is fixed to the loading base by the handwheel mounting seat fixing bolt, and a screw support bearing is provided inside the handwheel mounting seat for supporting the feed screw. One end of the feed screw is connected to the advance and retreat handwheel, and the other end is connected to the screw sleeve. The screw sleeve is installed on the guide seat and can drive the guide seat to move forward and backward by rotating the advance and retreat handwheel. The ejector assembly is installed on the guide seat through the ejector sleeve to perform axial support of the test bearing mounting tooling. The guide seat is locked on the dovetail base plate by the connecting bolt, and the dovetail base plate and the guide seat are fixed to the loading base as a whole by the locking bolt.

[0013] Compared with the prior art, the present invention is a loading device for a composite bearing testing machine, which can apply axial and overturning loads to the test bearing, and the loading method can select single load loading or combined load loading. The present invention is cleverly designed and has the characteristics of convenient loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the front overall axle side structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the rear integral axle side structure of the present invention.

[0016] Figure 3 It is the front view of the present invention.

[0017] Figure 4 for Figure 3 Cross-sectional view in the AA direction.

[0018] As shown in the figure: 1 is the loading base, 1-1 is the dovetail block, 1-2 is the guide V-groove, 2 is the handwheel mounting seat, 3 is the axial loading seat, 4 is the advance and retreat handwheel, 5 is the overturning loading cylinder, 6 is the axial loading cylinder, 7 is the screw support bearing, 8 is the handwheel mounting seat fixing bolt, 9 is the loading base locking bolt, 10 is the axial loading seat locking bolt, 11 is the axial pressure sensor, 12 is the feed screw, 13 is the rear push plate, 14 is the axial loading rod wear-resistant sleeve, 15 is the guide seat, 16 is the overturning pressure sensor, 17 is the connecting sleeve, 18 is the overturning loading shaft, 19 is the overturning wear-resistant sleeve, 20 is the overturning loading sleeve, 21 is the screw sleeve, 22 is the ejector sleeve, 23 is the dovetail base plate, 24 is the connecting bolt, 25 is the locking bolt, 26 is the ejector assembly, 27 is the axial loading rod, 28 is the bidirectional loading connecting bolt, 29 is the guide column, and 30 is the front push plate.

[0019] Specific implementation process

[0020] The following specific examples further describe the purpose of the present invention in detail. The examples cannot be repeated here one by one, but the implementation mode of the present invention is not limited to the following examples.

[0021] Refer to the attached Figure 1 To Attachment Figure 4 A composite loading device for a bearing testing machine comprises: an axial loading device, an overturning loading device, an ejector pin positioning device and a loading base 1, characterized in that: the axial loading device is located on the upper side of the overturning loading device, and is used to apply an axial load to the tested bearing shaft; the overturning loading device is arranged in the middle position of the entire device, and is used to apply overturning loads in both tensile and compressive directions to the tested bearing; the ejector pin positioning device is arranged on the lower side of the overturning loading device, and is used to support the bearing testing tooling to increase the axial rotational stiffness of the bearing testing tooling; the loading base 1 is arranged above the frame, and is used to install the loading part, the overturning loading device and the ejector pin positioning device, and the loading base locking bolt 9 arranged above the loading base 1 is a T-bolt, which can cooperate with the T-slot arranged above the frame to fix the loading base 1.

[0022] The difference between this example and Example 1 is that a dovetail block 1-1 is provided above the loading base 1 for guiding the axial loading device, the tipping loading device and the ejector positioning device; a guide V-groove 1-2 is provided at the bottom of the loading base 1 for positioning the entire axial and tipping loading devices.

[0023] The difference between this example and Example 2 is that a V-shaped groove is provided at the bottom of the loading base 1, which can cooperate with the circular guide rail to improve the axial positioning accuracy.

[0024] The difference between this example and Example 1 is that the axial loading device comprises: an axial loading cylinder 6, an axial loading seat 3, an axial loading seat locking bolt 10, an axial pressure sensor 11, a rear thrust plate 13, an axial loading rod wear-resistant sleeve 14, a guide seat 15, an axial loading rod 27, a bidirectional loading connecting bolt 28, a guide column 29 and a front thrust plate 30. The axial loading cylinder 6 is installed on the axial loading seat 3 through a locking bolt. The axial loading seat 3 is fixed to the loading base 1 through the axial loading seat locking bolt 10. The axial loading seat 3 is provided with a dovetail groove structure that cooperates with the loading base 1. The output rod of the axial loading cylinder 6 is connected to the axial pressure sensor 11 arranged on the rear thrust plate 13. One end of the loading rod 27 is connected to the rear thrust plate 13, and the other end is connected to the front thrust plate 30. The axial loading rod 27 slides back and forth through the axial loading rod wear-resistant sleeve 14 arranged in the guide seat 15. The bidirectional loading connecting bolt 28 is arranged on the front thrust plate 30, which is connected to the installation tool of the test bearing to apply bidirectional tensile and compressive loads. The guide column 29 is arranged on the front thrust plate 30, and cooperates with the guide hole on the installation tool of the test bearing for axial positioning. The contact surface between the front thrust plate 30 and the test bearing installation tool is an arc surface, which can prevent the axial loading device from bearing part of the overturning load when the axial load and the overturning load are applied to the test bearing installation tool at the same time, and only makes the tested bearing bear two loads.

[0025] The difference between this example and Example 4 is that: the axial loading rods 27 can be provided with 4, 6 or 8 according to actual needs; the bidirectional loading connecting bolts 28 can be provided with 8, 10 or 12 on the end surface of the front push plate 30.

[0026] The difference between this example and Example 1 is that the overturning loading device includes: an overturning loading cylinder 5, an overturning pressure sensor 16, a connecting sleeve 17, an overturning loading shaft 18, an overturning wear-resistant sleeve 19 and an overturning loading sleeve 20. The above-mentioned overturning loading cylinder 5 is fixed to the axial loading seat 3 by a locking bolt, and the telescopic rod of the overturning loading cylinder 5 is connected to the overturning pressure sensor 16 installed on the connecting sleeve 17. One end of the overturning loading shaft 18 is connected to the connecting sleeve 17, and the other end is connected to the test bearing installation tooling to apply overturning loads in both tensile and compressive directions. The overturning loading sleeve 20 is installed in the guide seat 15 by interference fit, and a set of overturning wear-resistant sleeves 19 are respectively installed at both ends of the overturning loading sleeve 20. The overturning wear-resistant sleeves 19 cooperate with the overturning loading shaft 18 to enable the overturning loading shaft 18 to move freely forward and backward.

[0027] The difference between this example and Example 1 is that the ejector positioning device comprises: an advance and retreat handwheel 4, a handwheel mounting seat 2, a screw support bearing 7, a handwheel mounting seat fixing bolt 8, a feed screw 12, a screw sleeve 21, a guide seat 15, an ejector sleeve 22, an ejector assembly 26, a locking bolt 25, a dovetail base plate 23 and a connecting bolt 24. The handwheel mounting seat 2 is fixed to the loading base 1 by the handwheel mounting seat fixing bolt 8. A screw support bearing 7 is provided inside the handwheel mounting seat 2 for supporting the feed screw. 12, one end of the feed screw 12 is connected to the advance and retreat hand wheel 4, and the other end is connected to the screw sleeve 21. The screw sleeve 21 is installed on the guide seat 15, and the guide seat 15 can be driven to move forward and backward by rotating the advance and retreat hand wheel 4. The ejector assembly 26 is installed on the guide seat 15 through the ejector sleeve 22 to test the axial support of the bearing installation tooling. The guide seat 15 is locked on the dovetail base plate 23 by the connecting bolt 24, and the dovetail base plate 23 and the guide seat 15 are fixed to the loading base 1 as a whole by the locking bolt 25.

[0028] The working principle of this implementation is as follows:

[0029] When using the present invention to apply a load to the test bearing installation tooling, first, the feed screw 12 is rotated by the advance and retreat hand wheel 4 to drive the guide seat 15 to move forward, and the test bearing installation tooling is supported by the ejector assembly 26 to increase the rotation accuracy of the test tooling, and then the guide seat 15 is locked and fixed on the machine base by the locking bolt 25. Then, according to the test needs, choose to apply a tensile or compressive axial load, overturning load, etc. to the test bearing. If an axial load is to be applied, the axial loading cylinder 6 can be started to apply an axial load to the test bearing; if an overturning load is to be applied, the overturning loading cylinder 5 can be started to apply an overturning load to the test bearing; if an overturning load and an axial load are to be applied at the same time, the axial loading cylinder 6 and the overturning loading cylinder 5 can be started at the same time, and then the axial loading cylinder 6 and the overturning loading cylinder 5 are started and stopped according to the feedback of the axial pressure sensor 11 and the overturning pressure sensor 16 on the size of the applied load, and the pressure is maintained.

[0030] The above embodiments are only preferred examples of the present invention and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A composite loading device for a bearing testing machine comprises: An axial loading device, a tipping loading device, an ejector positioning device and a loading base (1), characterized in that: the axial loading device is located on the upper side of the tipping loading device, and is used to apply an axial load to the tested bearing; the tipping loading device is located in the middle of the entire device, and is used to apply tipping loads in both tensile and compressive directions to the tested bearing; the ejector positioning device is located on the lower side of the tipping loading device, and is used to support the tested bearing mounting tooling to increase the axial rotational stiffness of the tested bearing mounting tooling; the loading base (1) is located above the frame, and is used to install the axial loading device, the tipping loading device and the ejector positioning device; the loading base locking bolt (9) arranged above the loading base (1) is a T-bolt, which can cooperate with the T-slot arranged above the frame to fix the loading base (1); A dovetail block (1-1) is provided above the loading base (1) for guiding the axial loading device, the overturning loading device and the ejector positioning device; a guide V-shaped groove (1-2) is provided at the bottom of the loading base (1) for positioning the entire loading base (1); The axial loading device comprises: an axial loading cylinder (6), an axial loading seat (3), an axial loading seat locking bolt (10), an axial pressure sensor (11), a rear thrust plate (13), an axial loading rod wear-resistant sleeve (14), a guide seat (15), an axial loading rod (27), a bidirectional loading connecting bolt (28), a guide column (29) and a front thrust plate (30). The axial loading cylinder (6) is mounted on the axial loading seat (3) via a locking bolt. The axial loading seat (3) is fixed to the loading base (1) via the axial loading seat locking bolt (10). The axial loading seat (3) is provided with a dovetail groove structure that cooperates with the loading base (1). The output rod of the axial loading cylinder (6) is connected to the axial pressure sensor arranged on the rear thrust plate (13). (11), one end of the axial loading rod (27) is connected to the rear thrust plate (13), and the other end is connected to the front thrust plate (30). The axial loading rod (27) slides forward and backward through the axial loading rod wear-resistant sleeve (14) arranged in the guide seat (15). The bidirectional loading connecting bolt (28) is arranged on the front thrust plate (30) and connected to the tested bearing installation tooling to apply a tensile and compressive bidirectional load. The guide column (29) is arranged on the front thrust plate (30) and cooperates with the guide hole on the tested bearing installation tooling to perform axial positioning. The contact surface between the front thrust plate (30) and the tested bearing installation tooling is an arc surface, which can prevent the axial loading device from bearing a part of the overturning load when the axial load and the overturning load are applied to the tested bearing installation tooling at the same time.

2. The composite loading device for a bearing testing machine according to claim 1, characterized in that: The axial loading rods (27) can be provided with 4, 6 or 8 according to actual needs; the bidirectional loading connecting bolts (28) can be provided with 8, 10 or 12 on the end surface of the front push plate (30); The overturning loading device comprises: an overturning loading cylinder (5), an overturning pressure sensor (16), a connecting sleeve (17), an overturning loading shaft (18), an overturning wear-resistant sleeve (19) and an overturning loading sleeve (20). The overturning loading cylinder (5) is fixed on the axial loading seat (3) by a locking bolt. The telescopic rod of the overturning loading cylinder (5) is connected to the overturning pressure sensor (16) installed on the connecting sleeve (17). One end of the overturning loading shaft (18) is connected to the connecting sleeve (17), and the other end is connected to the tested bearing mounting tool to apply the overturning load in both tensile and compressive directions. The overturning loading sleeve (20) is installed inside the guide seat (15) by interference fit. A set of overturning wear-resistant sleeves (19) are respectively installed at both ends of the overturning loading sleeve (20). The overturning wear-resistant sleeve (19) cooperates with the overturning loading shaft (18) so that the overturning loading shaft (18) can move freely forward and backward. The ejector positioning device comprises: an advance and retreat hand wheel (4), a hand wheel mounting seat (2), a screw support bearing (7), a hand wheel mounting seat fixing bolt (8), a feed screw (12), a screw sleeve (21), an ejector sleeve (22), an ejector assembly (26), a locking bolt (25), a dovetail base plate (23) and a connecting bolt (24). The hand wheel mounting seat (2) is fixed to the loading base (1) by the hand wheel mounting seat fixing bolt (8). A screw support bearing (7) is provided inside the hand wheel mounting seat (2) for supporting the feed screw (12). The feed screw (12) One end of the guide seat (15) is connected to the advance / retract hand wheel (4), and the other end is connected to the screw sleeve (21). The screw sleeve (21) is installed on the guide seat (15) and can drive the guide seat (15) to move forward and backward by rotating the advance / retract hand wheel (4). The ejector assembly (26) is installed on the guide seat (15) through the ejector sleeve (22) to provide axial support for the tested bearing installation tooling. The guide seat (15) is locked on the dovetail base plate (23) by the connecting bolt (24). The dovetail base plate (23) and the guide seat (15) are fixed to the loading base (1) as a whole by the locking bolt (25).

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