Swing rod bearing impact endurance test device

Abstract

The utility model provides a swing rod bearing impact endurance test device which comprises a machine base and a sliding part arranged on the machine base in a sliding mode, the side edge of the sliding part is connected with a main shaft part, and one axial end of the main shaft part is connected with a swing rod bearing to be tested. The other axial end of the main shaft part is connected with a motor through a flexible piece coupler, the machine base is provided with an impact seat in the axial movement direction corresponding to the main shaft part, and the impact seat is provided with a clamping groove used for installing a swing rod corresponding to the swing rod bearing. Impact force generated when the main shaft component moves up and down is matched with a clamping groove in the impact seat to act on the swing rod bearing, impact force possibly encountered by the swing rod bearing in actual work can be simulated, durability and reliability of the swing rod bearing can be evaluated, potential risks of the swing rod bearing in actual work can be reduced by simulating actual working conditions, and the service life of the swing rod bearing is prolonged. And through the connection with the motor and the flexible sheet coupling, the automatic control of the impact force can be realized, and the automation level of the test is improved.

Description

Technical Field

[0001] The utility model relates to a swing rod bearing impact durability test device. Background Art

[0002] As one of the important components, the swing rod bearing has very important applications in electric hammers and reciprocating saws. During the working process of the swing rod bearing, the bearing core and the bearing shell are driven to rotate by the driving shaft. The swing rod bearing is a kind of spherical plain bearing. The structure of the swing rod bearing is similar to that of the spherical plain bearing. The swing rod bearing mainly emphasizes the function of the rod end. As an integrated transmission structure, the swing rod bearing can convert rotational motion into linear motion. The miniaturization and integration of the swing rod bearing make it widely used in electric tools such as electric drills and electric hammers. Due to the non-standard structural form and special working conditions of the swing rod bearing, it is difficult to conduct durability tests on a conventional bearing fatigue testing machine.

[0003] At present, there is no special test device on the market to simulate the impact conditions of the swing rod bearing during the use of electric tools, and it is difficult to test the impact durability life of the swing rod bearing. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a swing rod bearing impact durability test device.

[0005] To achieve the above object, the utility model provides a swing rod bearing impact durability test device, which includes a machine base and a sliding member slidably arranged on the machine base. A main shaft member is connected to the side of the sliding member. The main shaft member can slide in its axial direction through the sliding member. One axial end of the main shaft member is connected to a swing rod bearing to be tested, and the other axial end of the main shaft member is connected to a motor through a flexible disc coupling. An impact seat is arranged on the machine base corresponding to the axial movement direction of the main shaft member. A clamping groove for corresponding to the installation of the swing rod of the swing rod bearing is arranged on the impact seat. The impact force generated when the main shaft member moves up and down cooperates with the clamping groove on the impact seat to act on the swing rod bearing to simulate the impact durability condition of the swing rod bearing.

[0006] Further, the main shaft member includes a main shaft seat fixedly connected to the sliding member and a core shaft arranged in the main shaft seat. Deep groove ball bearings are arranged on the outer peripheral wall of the core shaft at both axial ends. A thrust ball bearing for bearing the impact force when the main shaft member moves up and down is further arranged at the end of the core shaft close to the flexible disc coupling. A connecting head for connecting the swing rod bearing is arranged at the lower end of the core shaft. The connecting head is fixedly connected to the inner ring of the swing rod bearing corresponding to it. The flexible disc coupling can drive the core shaft to rotate circumferentially along the axis, and the inner ring of the bearing rotates through the rotation of the core shaft.

[0007] Further, the sliding member includes a fixed base plate disposed on the machine base and a guide rail disposed on the fixed base plate. The guide rail is connected to a sliding plate through a plurality of sliders slidably engaged therewith, and one side wall of the sliding plate is connected to the spindle component.

[0008] Further, the flexible disc coupling includes flexible discs that are axially telescopic and connecting flanges disposed at both ends of the flexible discs. The flexible disc coupling transmits the rotational motion of the motor to the core shaft when the spindle component moves up and down.

[0009] Further, detachable counterweight plates are disposed on both sides of the shaft seat.

[0010] Further, a sliding convex rail is also disposed on the machine base corresponding to the impact seat. The impact seat is slidably engaged with the sliding convex rail, and the impact seat approaches or moves away from the pendulum bearing to be tested through the sliding convex rail.

[0011] The beneficial effects of the present utility model are as follows: By providing the machine base and the sliding member slidably disposed on the machine base, the spindle component disposed on the sliding member can be moved up and down. The pendulum of the pendulum bearing disposed on the spindle component is stuck in the card slot of the impact block. The motor drives the core shaft to rotate through the flexible disc coupling, and then drives the inner ring of the pendulum bearing to rotate. When the core shaft rotates, the inner ring of the pendulum bearing will move up and down while rotating, and then drive the spindle component to move up and down. The impact force generated when the spindle component moves up and down acts on the pendulum bearing, thereby simulating the impact durability condition of the pendulum bearing. It can simulate the impact force that the pendulum bearing may encounter in actual work, evaluate its durability and reliability. Simulating the actual working condition can reduce the potential risks of the pendulum bearing in actual work. By connecting with the motor and the flexible disc coupling, automatic control of the impact force can be achieved, improving the automation level of the test, enhancing safety, facilitating installation and maintenance, and being easy to operate. Description of the Drawings

[0012] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of the present utility model;

[0013] Figure 2 is a cross-sectional structural schematic diagram of an embodiment of the present utility model;

[0014] Figure 3 is a partial three-dimensional structural schematic diagram of an embodiment of the present utility model. Detailed Embodiments

[0015] The embodiments of the present utility model will be further described below in conjunction with the accompanying drawings: As shown in the figure, a swing rod bearing impact durability test device includes a machine base 1 and a sliding member 2 slidably disposed on the machine base 1. A main shaft member 3 is connected to the side of the sliding member 2. The main shaft member 3 can slide in its axial direction through the sliding member 2. One axial end of the main shaft member 3 is connected to a swing rod bearing 4 to be tested, and the other axial end of the main shaft member 3 is connected to a motor 6 through a flexible disc coupling 5. An impact seat 7 is provided on the machine base 1 corresponding to the axial movement direction of the main shaft member 3. A card slot 8 for mounting the swing rod corresponding to the swing rod bearing 4 is provided on the impact seat 7. The impact force generated when the main shaft member 3 moves up and down acts on the swing rod bearing 4 in cooperation with the card slot 8 on the impact seat 7 to simulate the impact durability condition of the swing rod bearing 4. Since there is a certain angle between the groove on the inner ring of the swing rod bearing 4 and the vertical plane of the axis, when the inner ring rotates and the outer ring with the swing rod is restricted from rotating, the swing rod head will swing up and down.

[0016] The main shaft member 3 includes a main shaft seat 9 fixedly connected to the sliding member 2 and a core shaft 10 disposed inside the main shaft seat 9. Deep groove ball bearings 11 are provided on the outer peripheral wall of the core shaft 10 at both axial ends. A thrust ball bearing 12 for bearing the impact force when the main shaft member 3 moves up and down is further provided at the end of the core shaft 10 close to the flexible disc coupling 5. A connecting head 13 for connecting the swing rod bearing 4 is provided at the lower end of the core shaft 10. The connecting head 13 is fixedly connected to the inner ring of the swing rod bearing 4. The flexible disc coupling 5 can drive the core shaft 10 to rotate circumferentially along the axis. The inner rings of the bearings rotate through the rotation of the core shaft 10. The core shaft 10 realizes axial and circumferential movement and rotation through the deep groove ball bearings 11 and the thrust ball bearing 12, and can bear the impact force generated when the main shaft member 3 moves up and down. The design of the bearings enables them to be replaced independently, facilitating maintenance and repair. The design of the thrust ball bearing 12 can bear the impact force when the main shaft member 3 moves up and down, preventing the core shaft 10 from shifting or being damaged when stressed. The design of the flexible disc coupling 5 allows the core shaft 10 to rotate circumferentially along the axis, providing precise rotation control and ensuring the accuracy of the test.

[0017] The sliding member 2 includes a fixed bottom plate 14 disposed on the machine base 1 and a guide rail 15 disposed on the fixed bottom plate 14. The guide rail 15 is connected to a sliding plate 17 through a plurality of sliders 16 slidably engaged therewith. One side wall of the sliding plate 17 is connected to the main shaft member 3.

[0018] The flexible disc coupling 5 includes a flexible disc that is axially telescopic and connecting flanges provided at both ends of the flexible disc. The flexible disc coupling transmits the rotational movement of the motor 6 to the core shaft 10 when the main shaft member 3 moves up and down.

[0019] Removable counterweight plates 18 are provided on both sides of the main shaft seat. When it is necessary to change the impact force on the swing rod bearing 4, tests can be carried out by adding counterweight plates of different specifications on both sides of the main shaft seat 9, which is convenient for adjustment.

[0020] Test process: The inner ring of the swing rod bearing 4 is fixed on the connecting head 13, and the connecting head 13 is threadedly connected to the core shaft 10. The motor 6 drives the core shaft 10 to rotate through a flexible disc coupling, and then drives the inner ring of the swing rod bearing 4 to rotate. During the test, the swing rod is stuck in the card slot 8 of the impact seat 7. When the core shaft 10 rotates, the inner ring of the swing rod bearing 4 will move up and down while rotating, and then drive the main shaft component 3 to move up and down. The impact force generated when the main shaft component 3 moves up and down acts on the swing rod bearing 4, thereby simulating the impact endurance working condition of the swing rod bearing 4.

[0021] A sliding convex rail 19 is also provided on the machine base 1 corresponding to the impact seat 7. The impact seat 7 is slidably matched with the sliding convex rail 19, and the impact seat 7 approaches or moves away from the swing rod bearing 4 to be tested through the sliding convex rail 19.

[0022] The above embodiments are only one of the preferred specific embodiments of the present invention. The general changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A rocker bearing impact durability test device, characterized in that: It includes a machine base and a sliding component slidably arranged on the machine base, wherein a main shaft component is connected to the side of the sliding component, and the main shaft component can slide in its axial direction through the sliding component, one axial end of the main shaft component is connected to a rocker bearing to be tested, and the other axial end of the main shaft component is connected to a motor through a flexible sheet coupling, and an impact seat is arranged on the machine base corresponding to the axial movement direction of the main shaft component, and a slot for installing a rocker corresponding to the rocker bearing is arranged on the impact seat, and the impact force generated when the main shaft component moves up and down cooperates with the slot on the impact seat to act on the rocker bearing, so as to simulate the impact durability working condition of the rocker bearing.

2. The swing arm bearing impact durability test device according to claim 1, characterized in that: The main shaft component includes a main shaft seat fixedly connected to the sliding component and a core shaft arranged in the main shaft seat. The outer peripheral wall of the core shaft is provided with deep groove ball bearings at both axial ends. The end of the core shaft close to the flexible plate coupling is also provided with a thrust ball bearing for bearing the impact force when the main shaft component moves up and down. The lower end of the core shaft is provided with a connecting head for connecting the rocker bearing. The connecting head is fixedly connected to the inner ring of the rocker bearing. The flexible plate coupling can drive the core shaft to rotate along the axial circumference, and the inner ring of the bearing rotates through the rotation of the core shaft.

3. The swing arm bearing impact durability test device according to claim 2, characterized in that: The sliding component comprises a fixed bottom plate arranged on the machine base and a guide rail arranged on the fixed bottom plate. The guide rail is connected to a sliding plate through a plurality of sliding blocks slidably matched therewith, and a side wall of the sliding plate is connected to the main shaft component.

4. The swing arm bearing impact durability test device according to claim 3, characterized in that: The flexible sheet coupling comprises a flexible sheet which is retractable in the axial direction and connecting flanges arranged at both ends of the flexible sheet. The flexible sheet coupling transmits the rotational motion of the motor to the core shaft when the main shaft component moves up and down.

5. The swing arm bearing impact durability test device according to claim 4, characterized in that: Removable counterweight plates are arranged on both sides of the main shaft seat.

6. The swing arm bearing impact durability test device according to claim 4, characterized in that: A sliding convex rail is also provided on the machine base corresponding to the impact seat, and the impact seat is slidably matched with the sliding convex rail, and the impact seat approaches or moves away from the rocker bearing to be tested through the sliding convex rail.

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