Roller mounting reliability detection device

Abstract

The utility model discloses a kind of roller installation reliability detection devices, including detection positioning mounting seat, and the short cylindrical pin and the edge cutting pin being vertically arranged on detection positioning mounting seat are equipped with positioning plane, the short cylindrical pin is elastic expansion sleeve, and the inner taper hole is equipped in elastic expansion sleeve front end, and the expansion sleeve taper head matched with this inner taper hole is connected with expansion sleeve tension rod, and expansion sleeve tension rod is drivenly connected with expansion sleeve driving device through force increasing mechanism;The edge cutting pin is set to the front end of edge cutting pin rod, and edge cutting pin rod is movably supported on detection positioning mounting seat along its axial direction, and the root of edge cutting pin is equipped with push shoulder, and edge cutting pin rod can be driven by pin rod push driving device and pushed forward along edge cutting pin axial direction, and pin rod push driving device is fixedly connected on detection positioning mounting seat.The roller installation reliability detection device of the utility model can provide accurate thrust to judge the installation reliability between roller and rocker body.

Description

Technical Field

[0001] This utility model relates to a quality inspection device, and more particularly to a device for testing the reliability of the installation of rollers on an engine rocker arm. Background Technology

[0002] The rocker arm on an engine is used to open and close the engine valves under the control of the cam. Rollers are usually installed on the rocker arm to contact the connected components and reduce friction during operation. The roller generally includes an outer ring, a needle roller, and a roller bushing. The roller bushing is connected to the rocker arm body by a snap ring. Whether the snap ring is installed properly or even missing will have a significant impact on the working performance of the rocker arm. In order to ensure the manufacturing and assembly quality of the rocker arm, the installation quality between the roller and the rocker arm body must be controlled to ensure the reliability of the roller installation. In order to check the reliability of the installation between the roller and the rocker arm body, the roller bushing can be manually pushed to feel it. However, this detection method cannot control the amount of thrust on the roller bushing, so it is difficult to accurately judge its installation reliability. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a roller installation reliability testing device, which can provide accurate thrust to judge the installation reliability between the roller and the rocker arm body.

[0004] To solve the above-mentioned technical problems, this utility model provides a roller installation reliability testing device, including a testing and positioning mounting base. The testing and positioning mounting base has a positioning plane and a short cylindrical pin and a chamfered pin perpendicular to the positioning plane. The short cylindrical pin is an elastic expansion sleeve with an inner conical hole at its front end. The conical head of the expansion sleeve, which matches the inner conical hole, is connected to a tensioning rod. The tensioning rod is connected to a tensioning drive device via a force-increasing mechanism. The chamfered pin is located at the front end of a chamfered pin rod, which is axially supported on the testing and positioning mounting base. A push shoulder is provided at the root of the chamfered pin. The chamfered pin rod can be driven forward along the axial direction by a pin push drive device, which is fixedly connected to the testing and positioning mounting base.

[0005] In the above structure, since the short cylindrical pin is an elastic expansion sleeve, the front end of the elastic expansion sleeve is provided with an inner conical hole. The expansion sleeve cone head that matches the inner conical hole is connected to the tensioning rod. The tensioning rod is connected to the tensioning drive device through a force amplification mechanism. Thus, the elastic expansion sleeve, as the short cylindrical pin, not only acts as the main positioning pin for the rocker arm being tested, but also provides a stable clamping effect on the rocker arm. The tensioning drive device pulls the expansion sleeve cone head through the force amplification mechanism, causing the elastic expansion sleeve to expand radially and press against the wall of the rocker arm shaft hole in the rocker arm, thereby firmly fixing the rocker arm. The force amplification mechanism can generate a larger pulling force under the same tensioning drive device force, making the rocker arm more securely fixed, thus meeting the fixing requirements for pushing and testing the rollers on the rocker arm.

[0006] Furthermore, since the chamfered pin is located at the front end of the chamfered pin rod, and the chamfered pin rod is movably supported on the detection and positioning mounting base along its axial direction, and a push shoulder is provided at the root of the chamfered pin, the chamfered pin rod can be driven by the pin rod push drive device to push forward along the chamfered pin axial direction. The pin rod push drive device is fixedly connected to the detection and positioning mounting base. Therefore, the chamfered pin not only serves as a positioning pin, but can also use the provided push shoulder to push the roller bushing on the rocker arm to detect the reliability of the roller installation. Its pushing force originates from the pin rod push drive device. The driving force of a good pin-push drive device can provide a suitable and accurate thrust for judging the installation reliability between the roller bushing and the rocker arm body. The magnitude of this thrust will not change due to human factors. If the pin-push drive device can push the roller bushing to move, the stroke of the pin-push drive device will exceed the normal length. The sensor on it will detect the corresponding position change, indicating that the roller on the rocker arm is not installed properly or is unqualified. Conversely, it can be judged that the roller on the rocker arm is installed properly. The detection and judgment are simple and convenient.

[0007] In a preferred embodiment of this invention, the positioning plane is an annular plane located at the root of the short cylindrical pin. This embodiment minimizes the machining requirements of the positioning plane while still meeting the positioning and installation requirements of the rocker arm.

[0008] In another preferred embodiment of this utility model, the tensioning drive device is a cylinder or hydraulic cylinder fixedly connected to the detection and positioning mounting base. With this embodiment, the cylinder or hydraulic cylinder can provide a stable and reliable force through the piston rod, and the force can be adjusted by air pressure or hydraulic pressure, thus meeting the requirements for tensioning drive.

[0009] In another preferred embodiment of this utility model, the force-amplifying mechanism is a lever mechanism. The lever in the lever mechanism is hinged on a detection and positioning mounting base. The long arm of the lever is connected to a cylinder or hydraulic cylinder, which serves as a tensioning drive device, and the short arm of the lever is connected to the rear end of a tensioning rod. This embodiment has a simple structure, and an ideal and stable force-amplifying effect can be obtained by setting the length ratio of the long arm to the short arm of the lever.

[0010] In a further preferred embodiment of this invention, connecting pins are respectively provided at the ends of the tensioning rod and the piston rod of the cylinder or hydraulic cylinder, and the two ends of the lever are respectively connected to the corresponding connecting pins through elongated holes. This embodiment satisfies the connection and operation requirements between the swinging lever and the linearly moving tensioning rod and piston rod.

[0011] In another further preferred embodiment of this utility model, a pin return spring is provided between the chamfered pin and the detection and positioning mounting base. With this embodiment, the pin return spring ensures that the chamfered pin remains in its initial position, meeting the rocker arm positioning requirements, when no other force is applied, facilitating its use.

[0012] In another preferred embodiment of this utility model, the pin-pushing drive device is a pneumatic cylinder or a hydraulic cylinder. Using this embodiment, a pneumatic cylinder or a hydraulic cylinder as the pin-pushing drive device can provide a stable pushing force, and the magnitude of this force can be set by adjusting the air pressure or hydraulic pressure to meet the pushing detection requirements of rocker arm rollers of different specifications.

[0013] In a further preferred embodiment of this invention, before the pin pusher drive device is activated, an axial clearance is maintained between the front end face of the pusher member located at the piston rod end of the cylinder or hydraulic cylinder of the pin pusher drive device and the rear end face of the chamfered pin. This embodiment ensures that the chamfered pin has a defined initial position under the action of the pin return spring and is not interfered with by the pin pusher drive device. Attached Figure Description

[0014] The roller installation reliability testing device of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of a specific embodiment of the roller installation reliability testing device of this utility model;

[0016] Figure 2 yes Figure 1 A cross-sectional view of part AA in the structure shown;

[0017] Figure 3 yes Figure 1 A cross-sectional view of the BB section in the structure shown.

[0018] In the diagram: 1-Detection and positioning mounting base, 2-rocker arm, 3-beveled pin, 4-roller, 5-positioning plane, 6-short cylindrical pin, 7-force amplification mechanism, 8-tightening drive device, 9-expansion sleeve cone, 10-tightening tie rod, 11-connecting pin, 12-long hole, 13-push shoulder, 14-beveled pin rod, 15-pin rod return spring, 16-pin rod push drive device. Detailed Implementation

[0019] exist Figure 1 In the roller installation reliability testing device shown, the testing positioning mounting base 1 is the basic positioning support of this device. The testing positioning mounting base 1 is provided with a positioning plane 5 and a short cylindrical pin 6 and a chamfered pin 3 arranged perpendicular to the positioning plane 5. The positioning plane 5 is an annular plane located on the outer periphery of the root of the short cylindrical pin 6 on the testing positioning mounting base 1. The positioning plane 5 is arranged vertically. The rocker arm shaft hole of the rocker arm 2 being tested is sleeved on the short cylindrical pin 6, and its hole end face is in contact with the positioning plane 5. The bushing hole of the roller 4 of the rocker arm 2 being tested is sleeved on the chamfered pin 3. In this way, the rocker arm 3 being tested is reliably installed and positioned by the two pins and one side.

[0020] See Figure 2 The short cylindrical pin 6 is an elastic expansion sleeve, a conventional positioning and clamping structure. Its front end has several circumferential slits forming several segments that facilitate radial expansion. Its root is inserted and fixedly connected to the detection and positioning mounting base 1. An inner conical hole is provided at the front end of the elastic expansion sleeve, and the expansion sleeve cone head 9, which mates with this inner conical hole, is connected to the tensioning rod 10. The tensioning rod 10 is axially movable on the detection and positioning mounting base 1 via a support bushing or linear bearing. The tensioning rod 10 is connected to the tensioning drive device 8 via a force-increasing mechanism 7. The tensioning drive device 8 is a cylinder or hydraulic cylinder fixed to the detection and positioning mounting base 1. The force-increasing mechanism 7 is preferably a lever mechanism, in which the lever hinges at the detection and positioning mounting base 1. The lever can swing horizontally on the seat 1. The long arm end of the lever is connected to the piston rod end of the cylinder or oil cylinder, which serves as the tensioning drive device 8, via a connecting pin 11. The short arm end of the lever is also connected to the rear end of the tensioning rod 10 via a connecting pin 11. The two connecting pins 11 are respectively fixed to the rear end of the tensioning rod 10 and the piston rod end of the cylinder or oil cylinder. The two ends of the lever are respectively connected to the corresponding connecting pins 11 via elongated holes 12. The tensioning drive device 8 pushes the long arm end of the lever, causing the short arm end of the lever to pull the tensioning rod 10 and cause the expansion sleeve cone head 9 to retract inward. The retracted expansion sleeve cone head acts on the inner cone hole at the front end of the elastic expansion sleeve, causing each lobe of the elastic expansion sleeve to expand radially, thereby fixing the rocker arm 2 in the rocker arm shaft hole of the tensioning rocker arm 2.

[0021] See Figure 3The chamfered pin 3 is located at the front end of the chamfered pin rod 14. The chamfered pin rod 14 is axially supported on the detection and positioning mounting seat 1 via a linear bearing. A push shoulder 13 is provided at the root of the chamfered pin 3, and the diameter of the push shoulder 13 corresponds to the diameter of the bushing of the roller 4. A pin return spring 15 is provided between the chamfered pin rod 14 and the detection and positioning mounting seat 1. A spring seat is installed at the rear end of the chamfered pin rod 14. The pin return spring 15 is sleeved on the chamfered pin rod 14 and located between the spring seat and the linear bearing, so that when there is no external thrust, the return spring 15 can be used without external thrust. The lower chamfered pin 3 is in its initial position, which is attached to the detection and positioning mounting base 1 by the push shoulder. A pin push drive device 16 is provided at the rear end of the chamfered pin 14. The pin push drive device 16 is fixedly connected to the detection and positioning mounting base 1. The pin push drive device 16 is a cylinder or a hydraulic cylinder. Before the pin push drive device 16 is activated, there is an axial gap between the front end face of the push member provided at the piston rod end of the cylinder or hydraulic cylinder of the pin push drive device 16 and the rear end face of the chamfered pin 14 (i.e., the rear end face of the spring seat sleeve installed at the rear end of the chamfered pin 14). After the pin push drive device 16 is activated, the chamfered pin 14 can be driven by the pin push drive device 16 to push forward stably along the axial direction of the chamfered pin 3 with a set thrust. In this way, the push shoulder 13 at the root of the chamfered pin 3 will push the bushing of the roller 4 with a suitable thrust. If it cannot be pushed, it is qualified. If the bushing is pushed, the stroke length of the pin push drive device 16 will reach a certain value, which can be easily detected by the position sensor. At this time, it indicates that the roller 4 on the rocker arm 2 is not installed properly, and the installation reliability between the bushing of the roller 4 and the rocker arm 2 body can be accurately detected.

[0022] The above are only some preferred embodiments of this utility model, but are not limited thereto, and many improvements and modifications can be made. Any improvements and modifications made based on the basic principles of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A roller installation reliability testing device, comprising a testing and positioning mounting base (1), wherein a positioning plane (5) and a short cylindrical pin (6) and a chamfered pin (3) are provided on the testing and positioning mounting base (1) perpendicular to the positioning plane (5), characterized in that: The short cylindrical pin (6) is an elastic expansion sleeve. The front end of the elastic expansion sleeve is provided with an inner conical hole. The expansion sleeve cone head (9) that matches the inner conical hole is connected to the tensioning rod (10). The tensioning rod (10) and the tensioning drive device (8) are connected by a force-increasing mechanism (7). The chamfered pin (3) is located at the front end of the chamfered pin rod (14). The chamfered pin rod (14) is movably supported on the detection and positioning mounting base (1) along its axial direction. A push shoulder (13) is provided at the root of the chamfered pin (3). The chamfered pin rod (14) can be driven by the pin push drive device (16) to push forward along the axial direction of the chamfered pin (3). The pin push drive device (16) is fixedly connected to the detection and positioning mounting base (1).

2. The roller installation reliability testing device according to claim 1, characterized in that: The positioning plane (5) is an annular plane located at the root of the short cylindrical pin (6).

3. The roller installation reliability testing device according to claim 1, characterized in that: The tensioning drive device (8) is a cylinder or hydraulic cylinder fixed to the detection and positioning mounting base (1).

4. The roller installation reliability testing device according to claim 1, characterized in that: The force-increasing mechanism (7) is a lever mechanism. The lever hinge in the lever mechanism is on the detection and positioning mounting base (1). The long arm end of the lever is connected to the cylinder or oil cylinder that serves as the tensioning drive device (8), and the short arm end of the lever is connected to the rear end of the tensioning rod (10).

5. The roller installation reliability testing device according to claim 4, characterized in that: Connecting pins (11) are provided at the ends of the tensioning rod (10) and the piston rod of the cylinder or oil cylinder, respectively, and the two ends of the lever are connected to the corresponding connecting pins (11) through elongated holes (12).

6. The roller installation reliability testing device according to claim 1, characterized in that: A pin return spring (15) is provided between the chamfered pin (14) and the detection positioning mounting base (1).

7. The roller installation reliability testing device according to claim 1, characterized in that: The pin push drive device (16) is a pneumatic cylinder or a hydraulic cylinder.

8. The roller installation reliability testing device according to claim 7, characterized in that: Before the pin push drive device (16) is activated, there is an axial gap between the front end face of the push member provided at the piston rod end of the cylinder or oil cylinder of the pin push drive device (16) and the rear end face of the beveled pin (14).

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