Compressor crankshaft detection device
By incorporating a mirror and motor gear system into the crankshaft inspection device, the problem of not being able to simultaneously observe the entire crankshaft in existing technologies has been solved, enabling rapid and high-precision inspection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHANGZHOU LIQUAN PRECISE MASCH CO LTD
- Filing Date
- 2025-12-30
- Publication Date
- 2026-04-17
AI Technical Summary
Existing crankshaft inspection devices cannot simultaneously observe the entire crankshaft, resulting in slow inspection speed and low accuracy.
A compressor crankshaft detection device was designed, which uses a mirror placed directly below the crankshaft and drives the rotation of the mirror and the crankshaft through a motor and gear system. In conjunction with a PLC controller, the device enables synchronous observation of the upper and lower halves of the crankshaft.
This allows for simultaneous observation of the upper and lower halves of the crankshaft, improving detection speed and accuracy while reducing the physical exertion of operators.
Smart Images

Figure CN121877402A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of crankshaft testing equipment, and in particular to a compressor crankshaft testing device. Background Technology
[0002] The crankshaft is the most important component in an engine. It bears the force transmitted from the connecting rods and converts it into torque, which is then output through the crankshaft to drive other accessories on the engine.
[0003] When inspecting a crankshaft, the operator needs to suspend the crankshaft in the air and then use specialized equipment to conduct a comprehensive inspection of the entire crankshaft.
[0004] Although existing testing devices can suspend the crankshaft, operators can only observe the upper half of the crankshaft when standing, and cannot observe the entire crankshaft at the same time. However, sometimes it is necessary to observe the entire crankshaft at the same time during testing, which requires the testing personnel or operators to stand up and squat several times, reducing the testing speed. In addition, due to the repeated standing and squatting, it is difficult to observe the entire crankshaft at the same time, resulting in reduced testing accuracy. Summary of the Invention
[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a compressor crankshaft testing device that can accelerate the testing speed and improve the testing accuracy.
[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A compressor crankshaft detection device includes a device body, the device body including two vertical plates, each of the two vertical plates being provided with a clamping part, the two clamping parts fixing the position of the crankshaft, and an observation component being provided between the two vertical plates, the observation component including a mirror surface, the mirror surface being horizontally arranged between the two vertical plates, and the mirror surface being located directly below the crankshaft.
[0007] In a preferred embodiment, the present invention may be further configured such that the observation component further includes a placement plate located between the two upright plates, and the placement plate is rotatably connected to one of the upright plates; Another vertical plate has a first placement groove on one side, and a bearing seat is provided in the first placement groove. The placement plate and the bearing seat are rotatably connected by a shaft. A first motor is fixedly installed on one side of the inner wall of the first placement slot. A rotating plate is fixedly connected to the output end of the first motor, and one side of the rotating plate is fixedly connected to the shaft.
[0008] In a preferred embodiment, the present invention may be further configured such that: the clamping part includes a rotating block, the rotating block is disposed on the corresponding upright plate, the rotating block is rotatably connected to the corresponding upright plate, and an electric gripper is provided on one side of each rotating block.
[0009] In a preferred embodiment, the present invention can be further configured such that: a placement seat is fixedly provided on the other side of each of the upright plates, and a second motor is fixedly provided on the top of the placement seat by a support frame, and a first gear is fixedly provided on the output end of the second motor; A second gear is fixedly provided on one side of each of the rotating blocks, and the first gear meshes with the second gear.
[0010] In a preferred embodiment, the present invention can be further configured such that: the placement base and the corresponding upright plate are jointly and fixedly provided with a protective shell, and the second motor, the second gear, the first gear and the rotating block portion are all located inside the corresponding protective shell.
[0011] In a preferred embodiment, the present invention may be further configured such that the placement plate is slidably connected to the mirror surface; The top of the placement plate has two symmetrically opened sliding grooves, and the bottom of the mirror is symmetrically fixed with two sliding blocks. The sliding blocks are located in the corresponding sliding grooves and are slidably connected to the corresponding sliding grooves. Each groove is equipped with a horizontally fixed guide rod, which passes through the corresponding sliding block.
[0012] In a preferred embodiment, the present invention may be further configured such that a protective component is provided on the lower half of one side of each of the upright plates; The protective component includes an arc-shaped plate, which is fixed to one side of the corresponding upright plate. Both ends of the arc-shaped plate face the placement plate, and the arc-shaped plate is located below the placement plate. Each of the arc-shaped plates has rubber blocks fixedly installed at both ends.
[0013] In summary, the present invention has at least one of the following beneficial technical effects: 1. By installing a mirror under the crankshaft, operators can simultaneously observe the upper and lower halves of the crankshaft, facilitating inspection, accelerating inspection speed, and improving inspection accuracy.
[0014] 2. By setting the mirror and the placement plate to be a sliding connection, it is easier for operators to adjust the position of the mirror according to the actual situation, so that operators can see the content displayed on the mirror more clearly.
[0015] 3. By setting a second motor, a first gear, and a second gear, the rotating block is rotated, allowing the operator to adjust the detection position to a convenient one according to the actual detection situation.
[0016] 4. By incorporating an arc-shaped plate, the placement plate and mirror surface are prevented from contacting the ground, thus extending their service life. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this embodiment; Figure 2 yes Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 yes Figure 2 A schematic diagram of the left-side structure of the central arc-shaped plate.
[0018] In the figure, 1 is the main body of the device; 11 is the upright plate; 2 is the observation component; 21 is the mirror; 22 is the placement plate; 23 is the first placement slot; 24 is the first motor; 3 is the rotating block; 4 is the placement seat; 41 is the second motor; 42 is the first gear; 43 is the second gear; 44 is the protective shell; 5 is the arc plate; and 51 is the rubber block. Detailed Implementation
[0019] The present invention will be further described in detail below with reference to the accompanying drawings.
[0020] Example: Reference Figures 1-3 As shown, this invention discloses a compressor crankshaft detection device, comprising a device body. The device body includes two upright plates. The two upright plates are fixed to the ground. Each upright plate is provided with a clamping part, which is used to fix the crankshaft position.
[0021] The clamping unit includes a rotating block. The rotating block is mounted on a corresponding upright plate. The rotating block is rotatably connected to the corresponding upright plate. An electric gripper is provided on one side of each rotating block. The electric drive component of the electric gripper is located inside the corresponding rotating block. The electric gripper is powered by an external power source.
[0022] To facilitate operators in inspecting various parts of the crankshaft, a mounting base is fixedly installed on the other side of each vertical plate. A second motor is fixedly installed on the top of the mounting base via a support frame, and a first gear is fixedly installed at the output end of the second motor.
[0023] Each rotating block has a second gear fixedly mounted on one side, and the first gear meshes with the second gear. A second motor drives the first gear to rotate, which in turn drives the second gear to rotate, ultimately causing the corresponding rotating block to rotate.
[0024] Both first motors are controlled by a PLC controller (not shown in the diagram). The PLC controller precisely controls the direction and speed of the two first motors, enabling the output terminals of the two first motors to rotate synchronously in the same direction. The mounting base and the corresponding upright plate are jointly fixed with a protective shell, and the second motor, the second gear, the first gear, and the rotating block are all located inside the corresponding protective shell.
[0025] In addition, to facilitate simultaneous observation of both the upper and lower halves of the crankshaft within the line of sight, an observation assembly is installed between the two vertical plates. The observation assembly includes a mirror, which is horizontally positioned between the two vertical plates and directly below the crankshaft.
[0026] The observation assembly also includes a placement plate located between two uprights and rotatably connected to one of the uprights.
[0027] A first placement groove is provided on one side of the other upright plate, and a bearing seat is provided in the first placement groove. The placement plate and the bearing seat are rotatably connected by a shaft. A first motor is fixedly installed on one side of the inner wall of the first placement groove, and a rotating plate is fixedly connected to the output end of the first motor. One side of the rotating plate is fixedly connected to the shaft.
[0028] The first motor is also electrically connected to the PLC controller.
[0029] The placement plate is slidably connected to the mirror surface. Two grooves are symmetrically opened on the top of the placement plate, and two sliding blocks are symmetrically fixed on the bottom of the mirror surface. The sliding blocks are located in the corresponding grooves and are slidably connected to the corresponding grooves. A guide rod is horizontally fixed in each groove and passes through the corresponding sliding block.
[0030] Each upright plate has a protective component on the lower half of one side. The protective component includes an arc-shaped plate, which is fixed to one side of the corresponding upright plate. The two ends of the arc-shaped plate face the placement plate and are located below the placement plate. Rubber blocks are fixedly installed at both ends of each arc-shaped plate.
[0031] The implementation principle of the above embodiments is as follows: The operator first fixes the crankshaft with two electric grippers, so that the crankshaft is placed horizontally.
[0032] The operator can control the rotation of the two second motors as needed. The second motors drive the first gear to rotate, the first gear drives the corresponding second gear to rotate, and the second gear drives the corresponding rotating block to rotate.
[0033] The two rotating blocks rotate slowly, causing the crankshaft to rotate, making it convenient for operators to inspect the crankshaft from the front.
[0034] In addition, during the inspection process, the inspectors may need to see the upper and lower parts of the crankshaft.
[0035] At this time, the operator can start the first motor to rotate slowly through the PLC controller. The first motor drives the shaft to rotate, the shaft drives the placement plate to rotate, and the placement plate drives the mirror to rotate, so that the operator can clearly see the state of the lower half of the crankshaft.
[0036] To limit the rotation angle of the placement plate, the PLC controller is the first layer of control, and the curved plate is the second layer of control.
[0037] Sensors are installed at both ends of the curved plate. When the rubber block is touched by an external force, the pressure value is detected, and the sensor sends an electrical signal to the PLC controller, which then stops the first motor from working.
[0038] To further facilitate operators in viewing the images on the mirror.
[0039] The operator can change the position of the mirror by pulling it. The sliding block at the bottom of the mirror is connected to the guide rod with damping. After the mirror is pulled, its position will not change unless external force is applied.
[0040] The length of the top groove of the placement plate is limited, so the mirror can only be pulled a limited distance. In addition, the position of the curved plate also limits the movement of the mirror, so the mirror will not touch the ground when the placement plate rotates.
[0041] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.
Claims
1. A compressor crankshaft detection device, comprising a device body (1), the device body (1) comprising two vertical plates (11), each of the two vertical plates (11) being provided with a clamping part, the two clamping parts fixing the position of the crankshaft, characterized in that, An observation component (2) is provided between the two upright plates (11). The observation component (2) includes a mirror (21), which is horizontally positioned between the two upright plates (11) and is located directly below the crankshaft.
2. The compressor crankshaft detection device according to claim 1, characterized in that: The observation assembly (2) further includes a placement plate (22) located between the two upright plates (11) and rotatably connected to one of the upright plates (11); Another upright plate (11) has a first placement groove (23) on one side, and a bearing seat is provided in the first placement groove (23). The placement plate (22) and the bearing seat are rotatably connected by a shaft. A first motor (24) is fixedly installed on one side of the inner wall of the first placement groove (23). A rotating plate is fixedly connected to the output end of the first motor (24), and one side of the rotating plate is fixedly connected to the shaft.
3. The compressor crankshaft detection device according to claim 2, characterized in that: The clamping part includes a rotating block (3), which is disposed on the corresponding upright plate (11). The rotating block (3) is rotatably connected to the corresponding upright plate (11), and an electric gripper is provided on one side of each rotating block (3).
4. A compressor crankshaft detection device according to claim 3, characterized in that: Each of the upright plates (11) is fixedly provided with a placement seat (4) on the other side. A second motor (41) is fixedly provided on the top of the placement seat (4) by a support frame. A first gear (42) is fixedly provided at the output end of the second motor (41). Each of the rotating blocks (3) is fixedly provided with a second gear (43) on one side, and the first gear (42) meshes with the second gear (43).
5. A compressor crankshaft detection device according to claim 4, characterized in that: The placement base (4) and the corresponding upright plate (11) are jointly fixedly provided with a protective shell (44), and the second motor (41), the second gear (43), the first gear (42) and the rotating block (3) are all located inside the corresponding protective shell (44).
6. A compressor crankshaft detection device according to claim 5, characterized in that: The placement plate (22) is slidably connected to the mirror (21); The top of the placement plate (22) has two symmetrical sliding grooves, and the bottom of the mirror (21) has two symmetrically fixed sliding blocks (211). The sliding blocks (211) are located in the corresponding sliding grooves and are slidably connected to the corresponding sliding grooves. Each groove is horizontally fixed with a guide rod, which passes through the corresponding sliding block (211).
7. A compressor crankshaft detection device according to claim 6, characterized in that: Each of the vertical plates (11) is provided with a protective component on the lower half of one side; The protective component includes an arc-shaped plate (5), which is fixed to one side of the corresponding upright plate (11). Both ends of the arc-shaped plate (5) face the placement plate (22), and the arc-shaped plate (5) is located below the placement plate (22). Each of the arc-shaped plates (5) has a rubber block (51) fixedly installed at both ends.