An adjustable planetary carrier static balancing test fixture

Abstract

This utility model discloses an adjustable planetary carrier static balancing test fixture, including a fixed base, an upper adjusting base, and a lower adjusting base. The fixed base and the upper adjusting base are each equipped with a pair of freely rolling rollers. The upper adjusting base is mounted on the lower adjusting base and supported by several adjusting screws. The adjusting screws adjust the distance between the upper and lower adjusting bases. Both the lower adjusting base and the fixed base are mounted on a set of horizontally arranged guide rods. Moving the lower adjusting base and the fixed base along the guide rods changes the distance between them. This utility model facilitates adjustment of the height of the upper adjusting base and the distance between the fixed base and the lower adjusting base, and can accommodate static balancing tests on planetary carriers of various sizes.

Description

Technical Field

[0001] This utility model relates to a static balance test fixture, belonging to the field of static balance measurement technology. Background Technology

[0002] The planetary carrier is a key component in the planetary gear reducer mechanism, serving to support and position the planetary gears, transmit power, and bear loads. For cast planetary carriers, the unmachined cast surfaces may not be symmetrical about the center of rotation, and the blank inevitably contains defects such as porosity that cannot be directly observed. Therefore, cast planetary carriers require static balancing tests. Since the planetary carriers involved have a wide range of dimensions, with maximum outer diameters of rotation ranging from 600mm to 1100mm and total lengths from 130mm to 700mm, adjustable planetary carrier static balancing test fixtures are needed. Utility Model Content

[0003] To address the shortcomings of the existing technology, this invention provides an adjustable planetary carrier static balancing test fixture, designed to accommodate static balancing tests on planetary carriers of different sizes.

[0004] The technical solution of this utility model is as follows: An adjustable planetary carrier static balancing test fixture includes a fixed seat, an upper adjusting seat, and a lower adjusting seat. The fixed seat and the upper adjusting seat are each provided with a pair of freely rolling rollers. The upper adjusting seat is disposed on the lower adjusting seat and supported by a number of adjusting screws. The adjusting screws adjust the distance between the upper adjusting seat and the lower adjusting seat. The lower adjusting seat and the fixed seat are both mounted on a set of horizontally arranged guide rods. The lower adjusting seat and the fixed seat move on the guide rods to change the distance between the lower adjusting seat and the fixed seat.

[0005] Furthermore, the lower adjusting seat is provided with a removable pad, which is placed between the upper and lower adjusting seats to control the minimum distance between them. The pad is used to initially adjust the distance between the upper and lower adjusting seats, facilitating quick determination of the final distance via the adjusting screws.

[0006] Furthermore, the top surface of the lower adjusting seat is provided with a first sliding groove, the top surface of the pad is provided with a second sliding groove, the bottom surface of the pad is slidably engaged with the first sliding groove, and the bottom surface of the upper adjusting seat is slidably engaged with the second sliding groove. The sliding grooves restrict the relative position of the upper and lower adjusting seats in at least one direction, facilitating subsequent fixing of the upper adjusting seat.

[0007] Furthermore, the adjusting screws are provided in three parts and are arranged non-collinearly.

[0008] Furthermore, a support ball is embedded in the top surface of the adjusting screw, and the adjusting screw contacts the bottom surface of the upper adjusting seat through the support ball. The support ball reduces the contact area between the adjusting screw and the upper adjusting seat, making it easier to adjust the adjusting screw.

[0009] Furthermore, the fixed seat and the upper adjusting seat are provided with a plurality of pressure plate grooves.

[0010] Furthermore, the guide rod is fixedly connected to the lower adjusting seat, and the fixed seat is slidably mounted on the guide rod.

[0011] Compared with the prior art, the advantages of the technical solution provided by this utility model are as follows:

[0012] This invention divides one side of the test stand into two parts: an upper adjustment seat and a lower adjustment seat. The height of the upper adjustment seat is adjusted by adjusting screws. In addition, the distance between the fixed seat and the lower adjustment seat is adjusted by changing the position of the fixed seat under the guidance of the guide rod. This allows for a practical change in the relative height and spacing of the two pairs of rollers, thus enabling static balance tests on planetary carriers of various sizes. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the adjustable planetary carrier static balancing test fixture used in an embodiment.

[0014] Figure 2 This is a cross-sectional schematic diagram of the upper adjustment seat of the adjustable planetary carrier static balancing test fixture, as shown in the embodiment.

[0015] Figure 3 This is a schematic diagram of the adjustable planetary carrier static balancing test fixture structure (with the upper adjustment seat removed) for an embodiment.

[0016] Figure 4 This is a schematic diagram of the adjustable planetary carrier static balancing test fixture used in this embodiment for conducting a planetary carrier static balancing test. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading this description, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0018] Please combine Figures 1 to 3 As shown, the adjustable planetary carrier static balancing test fixture of this embodiment includes a fixed seat 1, an upper adjusting seat 2 and a lower adjusting seat 3, wherein the fixed seat 1 serves as a support on one side during the planetary carrier static balancing test, and the upper adjusting seat 2 and the lower adjusting seat 3 together constitute the support on the other side during the planetary carrier static balancing test.

[0019] The fixed base 1 and the upper adjusting base 2 are each equipped with a pair of freely rolling rollers, which serve as supports for the outer circumference of the planetary carrier. Specifically, in this embodiment, slots are provided in the fixed base 1 and the upper adjusting base 2 for mounting the rollers. The roller body 4 and the axle 5 rotate synchronously via a spline connection. End caps 7 are fixedly mounted on both sides of the slots using bolts 6. Bearings 8 are installed inside the end caps 7, and the bearings 8 cooperate with the axle 5 to ensure the rotation of the rollers. The axle 5 has its axial movement restricted by an elastic retaining ring 9.

[0020] The lower adjusting seat 3 and the fixed seat 1 are connected by guide rods 10 to facilitate changing the distance between them, thus adapting to the testing needs of planetary carriers of different total lengths. In this embodiment, two horizontal guide rods 10 are provided, which are fixedly connected to the lower adjusting seat 3. Guide holes that mate with the guide rods 10 are provided on the fixed seat 1. The distance between the fixed seat 1 and the lower adjusting seat 3 can be changed by moving the fixed seat 1 along the guide rods 10. By fixing the guide rods 10 to the lower adjusting seat 3, it is not necessary to move the lower adjusting seat 3 when changing the distance between it and the fixed seat 1, which reduces the impact on other components on the lower adjusting seat 3 (which will be described later) and facilitates operation.

[0021] A first sliding groove 301 and screw mounting holes are provided on the top surface of the lower adjusting seat 3. The screw mounting holes are used to install adjusting screws 11. The first sliding groove 301 extends through the lower adjusting seat 3 from left to right. Two pads 12 are provided in the first sliding groove 301 to cooperate with it. The bottom surface of the pads 12 is slidably engaged with the first sliding groove 301, that is, the pads 12 can slide within the first sliding groove 301. A second sliding groove 1201 is provided on the top surface of the pads 12, and the bottom surface of the upper adjusting seat 2 is slidably engaged with the second sliding groove 1201.

[0022] The screw mounting holes are used to install adjusting screws 11. Generally, three adjusting screws 11 are installed, and these three adjusting screws are not collinear. During tooling installation, the upper adjusting seat 2 is initially supported by the pad block 12, controlling the minimum distance between the upper adjusting seat 2 and the lower adjusting seat 3. Then, the height is adjusted by the adjusting screws 11 to achieve the desired height and ensure levelness. The three non-collinear adjusting screws 11 improve support stability. To reduce the resistance between the adjusting screws 11 and the bottom surface of the upper adjusting seat 2 during adjustment, a support ball 13 is embedded in the top surface of the adjusting screw 11, allowing the adjusting screw 11 to contact the bottom surface of the upper adjusting seat 2. The upper adjusting seat 2 cooperates with the lower adjusting seat 3, and by changing the height of the upper adjusting seat 2, it adapts to the testing needs of planetary carriers with different rotational outer diameters.

[0023] To ensure the stability of the tooling during the static balance test, the fixed seat 1 and the upper adjusting seat 2 are provided with several pressure plate grooves 14.

[0024] Please combine Figure 4 As shown, the steps for performing a static balance test using the adjustable planetary carrier static balance test fixture of this embodiment are as follows:

[0025] (1) First, assemble the tooling and place it on the machine tool table (or a platform with T-slots);

[0026] (2) Measure the dimensions of the planetary carrier for the test. Based on the value calculated by subtracting the outer diameter of the bearings at both ends and dividing by 2, select the corresponding height of the pad 12 for rough positioning. At least one pad 12 should be placed on each of the left and right sides.

[0027] (3) Place the sides of the upper adjusting seat 2, the lower adjusting seat 3, and the fixed seat 1 against the ruler or the plane of the equal height block to make them level (ensure they are on the same plane).

[0028] (4) Measure the dimensions of the planetary carrier to be tested, and then fix the distance between the fixed seat 1 and the lower adjusting seat 3, and adjust it so that at least the dimensions on the left and right sides are consistent;

[0029] (5) Use pressure plates to press the upper adjusting seat 2, the pressure plate groove 14 of the fixed seat 1 and the lower adjusting seat 3 to pre-tighten the fixture to prevent the position from moving during subsequent installation;

[0030] (6) Place the planetary carrier on the upper adjusting seat 2 and the fixed seat 1, and make the outer circles of the two bearings of the planetary carrier contact the rollers. At the same time, recheck the installation reference position and measurement data of steps (3) and (4). If there are any changes, loosen the pressure plate slightly and recalibrate.

[0031] (7) Place one level on the outer circle of the planetary carrier and one on the plane of the upper adjusting seat 2 along the direction of the guide rod 10. Use a wrench to rotate the adjusting screw 11 and adjust the height of the adjusting screw 11 so that the two levels are level. Then tighten the pressure plate again and remove the level.

[0032] (8) Manually roll the planet carrier until it comes to a stop, and then mark the vertically downward position.

[0033] (9) Repeat step (8) above twice;

[0034] (10) Check the position of the markers. If the markers are not in the same place and the angle between them is large, the planetary carrier is statically balanced. If the markers are in the same place or concentrated in a certain range, the planetary carrier is not statically balanced. It is necessary to attach balance blocks of different masses at the positions symmetrical to the center of the markers and roll the planetary carrier again until static balance is achieved.

Claims

1. An adjustable planetary carrier static balancing test fixture, characterized in that, The device includes a fixed base, an upper adjusting base, and a lower adjusting base. The fixed base and the upper adjusting base are each provided with a pair of freely rolling rollers. The upper adjusting base is disposed on the lower adjusting base and is supported by a number of adjusting screws. The adjusting screws adjust the distance between the upper adjusting base and the lower adjusting base. The lower adjusting base and the fixed base are both mounted on a set of horizontally arranged guide rods. The lower adjusting base and the fixed base move on the guide rods to change the distance between them.

2. The adjustable planetary carrier static balancing test fixture according to claim 1, characterized in that, The lower adjustment seat is provided with a removable pad, which is placed between the upper adjustment seat and the lower adjustment seat to control the minimum distance between the upper adjustment seat and the lower adjustment seat.

3. The adjustable planetary carrier static balancing test fixture according to claim 2, characterized in that, The top surface of the lower adjusting seat is provided with a first sliding groove, the top surface of the pad is provided with a second sliding groove, the bottom surface of the pad is slidably engaged with the first sliding groove, and the bottom surface of the upper adjusting seat is slidably engaged with the second sliding groove.

4. The adjustable planetary carrier static balancing test fixture according to claim 1, characterized in that, The adjusting screws are three in number and are arranged non-collinearly.

5. The adjustable planetary carrier static balancing test fixture according to claim 4, characterized in that, The top surface of the adjusting screw is fitted with a support ball, and the adjusting screw contacts the bottom surface of the upper adjusting seat through the support ball.

6. The adjustable planetary carrier static balancing test fixture according to claim 1, characterized in that, The fixed base and the upper adjusting base are provided with several pressure plate grooves.

7. The adjustable planetary carrier static balancing test fixture according to claim 1, characterized in that, The guide rod is fixedly connected to the lower adjusting seat, and the fixed seat is slidably mounted on the guide rod.

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