Balancing shaft static balance detection device

Abstract

The utility model discloses a balanced shaft static balance detection device, including bottom plate and install on the support frame of bottom plate, is installed on the support frame a pair of bearings, and the top of bearing is provided with the stand, and the stand is detachably equipped with cleaning pad and cleaning brush, and the control structure of support frame is provided with the control of stand movement, the utility model discloses through the automatic cleaning of bearing surface pollutant of moving stand drive cleaning pad and cleaning brush, avoids the detection error, and promotes the precision and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of balance shaft testing technology, and in particular to a balance shaft static balance testing device. Background Technology

[0002] The balance shaft is a crucial component of an engine. During engine operation, it is essential to counteract harmful vibrations, making it vital to ensure that every balance shaft leaving the factory meets stringent static balance standards. A balance shaft static balance testing device is specifically designed to detect the static balance of balance shafts. The core of this device involves placing the balance shaft at both ends on two high-precision, high-sensitivity bearing supports, with load cells integrated beneath the supports. When the balance shaft is gently placed on the bearings, gravity causes an imbalance, resulting in different pressures on the two bearings. The load cells capture and measure this pressure difference in real time, allowing for quick and accurate calculation of the magnitude of the imbalance.

[0003] The static balance testing device for balance shafts needs to test balance shafts frequently and continuously. Due to residual cutting fluid and metal shavings from processing, various tiny contaminants inevitably adhere to the surface of the balance shaft journal. When these journals with contaminants are placed on the precision bearing support of the testing device, the contaminants are easily squeezed, scraped, and remain on the bearing surface. This accumulation of contaminants will increase the measurement error of the weighing sensor.

[0004] To address the aforementioned problems, the inventors developed a static balance testing device for a balance shaft. Utility Model Content

[0005] The purpose of this invention is to provide a static balance testing device for balance shafts. This device can automatically clean contaminants on the bearing surface, avoid testing errors, and improve operating efficiency.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A static balance testing device for a balance shaft includes a base plate and a support frame mounted on the base plate. A pair of bearings are installed on the support frame. The device is characterized in that: a shelf is provided above the bearings, and a cleaning pad and a cleaning brush are detachably provided on the shelf. The support frame is provided with a control structure for controlling the movement of the shelf.

[0008] By adopting the above technical solution, the rack moves back and forth under the drive of the control structure, so that the cleaning pad and cleaning brush automatically clean the cutting fluid, metal shavings and other contaminants attached to the bearing surface, avoiding the measurement error of the weighing sensor caused by the accumulation of contaminants.

[0009] The shelf is further configured such that its cross-section is U-shaped.

[0010] By adopting the above technical solution, the U-shaped structure makes it easy for the two ends of the balance shaft to be limited on the shelf, and it is not easy for the two ends of the balance shaft to detach from the shelf.

[0011] The cleaning pad is further configured such that it is located on the upper surface of the shelf, the shelf has an installation groove, and the cleaning pad has inserts on both sides, the inserts being inserted into the installation groove.

[0012] By adopting the above technical solution, the plug-in design of the plug and the mounting slot enables quick disassembly and assembly of the cleaning pad, facilitating the replacement of worn parts.

[0013] A further configuration is provided: a limiting rod is provided above the mounting groove, and the limiting rod is rotatably mounted on the upper surface of the shelf.

[0014] By adopting the above technical solution, the rotating limit rod can lock the insert block, preventing the cleaning pad from falling off during movement.

[0015] The cleaning brush is further configured in that there are two brushes, each brush being symmetrically arranged between the two bearings, and the brush surface of the cleaning brush being adapted to the outer ring of the bearing.

[0016] By adopting the above technical solution, the symmetrically designed cleaning brush precisely covers the outer surface of the bearing ring, ensuring that contaminants are completely removed.

[0017] The design is further configured such that both cleaning brushes are mounted on a support rod, the bottom of the support frame has a sliding groove along its length, the top of the support rod is slidably disposed in the sliding groove, and the support frame is provided with fixing bolts for fixing the support rod.

[0018] By adopting the above technical solution, the position of the support rod is adjusted along the sliding groove, so that the cleaning brush can adapt to bearings of different sizes, and the fixing bolts ensure working stability.

[0019] A further configuration is provided: each of the cleaning brushes is attached to the support rod via Velcro.

[0020] By adopting the above technical solution, Velcro allows for convenient replacement of cleaning brushes, reducing maintenance costs.

[0021] The control structure is further configured as follows: a slide groove is formed in the support frame, a slide rod is fixedly connected to the shelf, and a pull block is provided at one end of the slide rod extending out of the slide groove.

[0022] By adopting the above technical solution, the manual operation of the pull block drives the slide bar to move along the slide groove, thereby driving the shelf to complete the cleaning action. The structure is simple and reliable.

[0023] A further feature is provided: a return spring is provided between the pulling block and the support frame.

[0024] By adopting the above technical solution, the reset spring automatically pulls the shelf back to its initial position, avoiding interference from the shelf during testing. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0026] Figure 2 This is a cross-sectional view of the support frame in this embodiment;

[0027] Figure 3 This is a partial exploded view of this embodiment;

[0028] Figure 4 This is a diagram showing the initial position of the shelf in this embodiment;

[0029] In the diagram: 1. Base plate; 11. Support frame; 12. Bearing; 13. Shelf; 14. Cleaning pad; 15. Cleaning brush; 31. Mounting slot; 32. Insert block; 41. Limiting rod; 61. Support rod; 62. Sliding groove; 63. Fixing bolt; 71. Velcro; 81. Sliding groove; 82. Sliding rod; 83. Pull block; 91. Return spring; Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings.

[0031] refer to Figures 1 to 4 A static balance testing device for a balance shaft includes a base plate 1 and a rectangular support frame 11 vertically fixed to the upper surface of the base plate 1. A pair of high-precision rolling bearings 12 are symmetrically mounted on opposite sides of each support frame 11, with the central axes of the bearings 12 parallel to each other and higher than the surface of the base plate 1. A horizontally arranged U-shaped shelf 13 is positioned directly above the bearings 12, with its opening facing upwards. The height of the two side walls of the U-shape is greater than the radius of the balance shaft to form a limiting groove. A rectangular cleaning pad 14, made of flexible oil-absorbing fiber, is centrally placed on the upper surface of the shelf 13. Metal inserts 32 are fixed to the two sides of the cleaning pad 14. Correspondingly, two vertical mounting grooves 31 are formed on the upper surface of the shelf 13, and the inserts 32 are inserted into the mounting grooves 31 in a vertical direction.

[0032] A cylindrical limiting rod 41 is provided above the mounting slot 31, which is hinged to the side of the shelf 13 via a pivot at one end. The limiting rod 41 can rotate 90° to the limiting position to press the top surface of the insert 32. Figure 3As shown. Two nylon cleaning brushes 15 are located below the shelf 13, their curved brush surfaces matching the outer ring of the bearing 12. The two cleaning brushes 15 are symmetrically attached to both ends of a support rod 61 via Velcro 71. The hook side of the Velcro 71 is fixed to the bottom surface of the support rod 61, and the rough side is fixed to the back of the cleaning brushes 15. A T-shaped sliding groove 62 is formed along the length of the bottom of the support frame 11. The T-shaped slider at the top of the support rod 61 is embedded in the sliding groove 62 and locked in place by the fixing bolts 63 on the side wall. Figure 2 As shown.

[0033] The control structure includes a linear slide groove 81 on the side of the support frame 11, an I-shaped slide rod 82 vertically fixed to the bottom of the shelf 13, and a rectangular pull block 83 extending from the left end of the slide rod 82 and connected to the slide groove 81. The slide rod 82 and the slide groove 81 are clearance-fitted to achieve horizontal sliding. A return spring 91 is connected between the pull block 83 and the side wall of the support frame 11. The natural length of the return spring 91 corresponds to the initial position of the shelf 13, which is to the left of the bearing 12. When the shelf 13 is in operation, it is located between the two bearings 12. Figure 4 As shown.

[0034] Workflow: Place the balance shaft inside the U-shaped shelf 13, rotate the limit rod 41 to lock the cleaning pad 14 to prevent it from falling off, and manually rotate the balance shaft so that both ends of the balance shaft are cleaned by the cleaning pad; manually rotate the bearing 12, and push and pull the pull block 83 horizontally to drive the slide rod 82 to move back and forth along the slide groove 81. The shelf 13 simultaneously drives the cleaning pad 14 to wipe the upper surface of the bearing 12, while the cleaning brush 15 scrapes off contaminants from the outer ring of the bearing 12; after releasing the pull block 83, the return spring 91 pulls the shelf 13 back to the initial position, completely detaching it from the bearing 12 area; remove the balance shaft and place both ends on the cleaned bearing 12 for static balance measurement.

[0035] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A static balance testing device for a balance shaft, comprising a base plate (1) and a support frame (11) mounted on the base plate (1), wherein a pair of bearings (12) are mounted on the support frame (11), characterized in that: A shelf (13) is provided above the bearing (12). A cleaning pad (14) and a cleaning brush (15) are detachably provided on the shelf (13). A control structure for controlling the movement of the shelf (13) is provided on the support frame (11).

2. The static balance testing device for a balance shaft according to claim 1, characterized in that: The shelf (13) has a U-shaped cross-section.

3. The static balance testing device for a balance shaft according to claim 1, characterized in that: The cleaning pad (14) is located on the upper surface of the shelf (13). The shelf (13) has an installation groove (31). The cleaning pad (14) has inserts (32) on both sides, and the inserts (32) are inserted into the installation groove (31).

4. The static balance testing device for a balance shaft according to claim 3, characterized in that: A limiting rod (41) is provided above the mounting groove (31), and the limiting rod (41) is rotatably mounted on the upper surface of the shelf (13).

5. The static balance testing device for a balance shaft according to claim 1, characterized in that: Two cleaning brushes (15) are provided, each of which is symmetrically arranged between the two bearings (12), and the brush surface of the cleaning brush (15) is adapted to the outer ring of the bearing (12).

6. The static balance testing device for a balance shaft according to claim 5, characterized in that: Both cleaning brushes (15) are mounted on a support rod (61). The bottom of the support frame (11) is provided with a sliding groove (62) along its length. The top of the support rod (61) is slidably disposed in the sliding groove (62). The support frame (11) is provided with fixing bolts (63) for fixing the support rod (61).

7. The static balance testing device for a balance shaft according to claim 6, characterized in that: Each of the cleaning brushes (15) is attached to the support rod (61) by Velcro (71).

8. The static balance testing device for a balance shaft according to claim 1, characterized in that: The control structure includes a slide groove (81) formed in the support frame (11), a slide rod (82) fixedly connected to the shelf (13), and a pull block (83) provided at one end of the slide rod (82) extending out of the slide groove (81).

9. A static balance testing device for a balance shaft according to claim 8, characterized in that: A return spring (91) is provided between the pull block (83) and the support frame (11).

Images