Sub-power dynamic balance clamping mechanism

Abstract

The utility model provides a sub-power dynamic balance clamping mechanism, which comprises a cover shell, a clamping mechanism, a first driving mechanism and a second driving mechanism, the positioning disc is mounted on the housing, a second center hole and a plurality of mounting holes are formed in the positioning disc, the mounting holes are uniformly distributed at intervals in the circumferential direction, positioning sleeves are arranged in the mounting holes, and clamping blocks are arranged in the positioning sleeves; the synchronizing part comprises a connecting shaft and a plurality of cantilevers uniformly distributed at intervals in the circumferential direction of the connecting shaft, the connecting shaft is installed in the first center hole and the second center hole, a pull rod is arranged at the end of each cantilever, and the pull rods are arranged in the positioning sleeves in a one-to-one correspondence mode; the pull rod comprises two clamping blocks which are oppositely arranged, each clamping block is provided with a clamping end, and an opening groove used for containing the clamping block is formed between the two clamping blocks. The clamping mechanism provided by the utility model has the beneficial effects that the tension provided by the central pull rod of the balancing machine can be uniformly distributed to the three bolt holes, and the obtained dynamic balance test result is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission shaft detection, in particular to a power distribution dynamic balance clamping mechanism. Background Art

[0002] The flexible coupling is an important component of the automobile transmission shaft. It has a certain ability to compensate for the relative offset of the two connected shaft axes. The transmission shaft can be connected to other parts on the automobile chassis through it. Figure 1 As shown, in a conventional transmission shaft 400, a flexible coupling 100 is threadedly fastened to the flange 300 of the transmission shaft 400. Bolt holes 101 are provided in the flexible coupling 100 for connection to a counterpart component. Three bolt holes 101 are spaced apart on the distribution circle of the transmission shaft 400, and a center hole 200 is provided at the center of the distribution circle to facilitate positioning and connection.

[0003] At present, ride comfort is an important criterion for judging the performance and grade of a vehicle, among which NVH (noise, vibration and harshness) technology is used as the main breakthrough to improve ride comfort. As one of the important components of the automobile chassis, the drive shaft 400 has a very significant impact on the NVH of the entire vehicle. In order to reduce the NVH risk, dynamic balancing technology is used in the production of the drive shaft 400. In order to accurately and effectively measure the manufacturing accuracy of the drive shaft 400 and make the dynamic balancing test results more in line with the actual installation conditions, it is required to change from the previous positioning center hole 200 to the positioning of three bolt holes 101 when conducting the dynamic balancing test. How to provide a new clamping mechanism to firmly mount the drive shaft 400 on the balancing machine for dynamic balancing test in response to the new positioning requirements is a problem that those skilled in the art urgently need to solve. Utility Model Content

[0004] The purpose of the utility model is to provide a power-dividing dynamic balancing clamping mechanism, so that the dynamic balancing test result can accurately reflect the installation and use conditions of the transmission shaft.

[0005] The utility model provides a power-dividing dynamic balancing clamping mechanism, comprising: a cover shell, which is provided with a first center hole; a positioning plate, installed on the cover shell, which is provided with a second center hole and a plurality of mounting holes evenly spaced along the circumference, the second center hole is coaxially arranged with the first center hole, a positioning sleeve is provided in the mounting hole, and a clamping block is provided in the positioning sleeve; a synchronous member, movably arranged between the cover shell and the positioning plate, comprising a connecting shaft and a plurality of cantilevers evenly spaced along the circumference of the connecting shaft, the connecting shaft is installed in the first center hole and the second center hole, a pull rod is provided at the end of the cantilever, and the plurality of pull rods are arranged in the plurality of positioning sleeves in a one-to-one correspondence; the pull rod comprises two clamping blocks arranged opposite to each other, each clamping block is provided with a clamping end, and an open groove for accommodating the clamping block is formed between the two clamping blocks; when the synchronous member drives the pull rod to move toward the direction of the cover shell, the two clamping ends are spread apart by the clamping block.

[0006] Preferably, the cover is fixedly installed via a mounting seat.

[0007] Preferably, the cover shell is further provided with a plurality of limiting holes evenly spaced along the circumferential direction, and the plurality of pull rods are arranged in the plurality of limiting holes in a one-to-one correspondence.

[0008] Preferably, a limiting groove is provided on the positioning sleeve, and a plug-in is provided at one end of the clamping block, and the plug-in is inserted into the limiting groove.

[0009] Preferably, a positioning ring and a washer are respectively provided on the pull rod, and an opening is provided at the end of the cantilever, and the opening is located between the positioning ring and the washer.

[0010] Preferably, the synchronizer comprises three cantilevers.

[0011] Preferably, the pull rod is inserted into a bolt hole of the transmission shaft.

[0012] The utility model is beneficial in that it provides a clamping mechanism that can evenly distribute the tension provided by the central pull rod of the balancing machine to the three bolt holes, is simple to install, and is convenient for assembly and disassembly and maintenance and replacement, and the obtained dynamic balancing test results are more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of an existing transmission shaft;

[0014] Figure 2 A three-dimensional diagram of the clamping mechanism of the present invention;

[0015] Figure 3 This is an exploded view of the clamping mechanism of the utility model;

[0016] Figure 4Schematic diagram of the structure of the cover;

[0017] Figure 5 Schematic diagram of the structure of the pull rod;

[0018] Figure 6 Schematic diagram of the connection structure between the positioning sleeve and the clamping block;

[0019] Figure 7 This is a top view of the clamping mechanism of the utility model;

[0020] Figure 8 for Figure 7 Cross-sectional view in the AA direction.

[0021] Component number description:

[0022] 1 Mounting Base

[0023] 11 Third center hole

[0024] 2 Cover

[0025] 21 First center hole

[0026] 22 limit holes

[0027] 3 Positioning plate

[0028] 31 mounting holes

[0029] 32 Second center hole

[0030] 4 tie rods

[0031] 41 Clamp

[0032] 42 Clamping end

[0033] 43 open slots

[0034] 44 locating ring

[0035] 5 card blocks

[0036] 51 plugins

[0037] 6 Positioning sleeve

[0038] 61 limit slot

[0039] 7 Synchronizers

[0040] 71 Cantilever

[0041] 72 connecting shaft

[0042] 8 washers

[0043] 100 Flexible Coupling

[0044] 101 bolt hole

[0045] 200 center hole

[0046] 300 flange

[0047] 400 drive shaft DETAILED DESCRIPTION

[0048] The following is a further detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the present invention.

[0049] In the description of this utility model, it should be noted that the terms "center," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0051] In addition, in the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0052] Figure 8 The figure shows a cross-sectional view of the utility model of the power distribution dynamic balance clamping mechanism. In the following description, Figure 8 The attached drawings in the figure serve as a reference for the direction. Figure 8 In the figure, the axial directions of the cover shell 2 and the positioning plate 3 are both defined as left and right directions, and the mounting seat 1 is located on the left side of the cover shell 2.

[0053] Since the power output end of the existing balancing machine is a central pull rod, it is necessary to design a clamping mechanism that can evenly distribute the tension provided by the central pull rod to the three bolt holes without changing the existing structure. Figure 2-3 As shown, the utility model provides a power-dividing dynamic balancing clamping mechanism, which includes a cover 2, a positioning plate 3 and a synchronizer 7.

[0054] like Figure 2-4 and Figure 8 As shown, the housing 2 is cylindrical and has a first center hole 21 at the center and three stop holes 22 evenly spaced along the circumference. The housing 2 is fixed to the balancing machine via a mounting base 1, which has a third center hole 11 coaxial with the first center hole 21.

[0055] like Figure 2-3 and Figure 8 As shown, the positioning disc 3 is disc-shaped and is mounted on the housing 2. A cavity for accommodating the synchronizer 7 is formed between the positioning disc 3 and the housing 2. The positioning disc 3 is provided with a second center hole 32 located at the center of the circle and three mounting holes 31 evenly spaced along the circumference. The second center hole 32 is coaxial with the first center hole 21. A positioning sleeve 6 is provided in each mounting hole 31, and a clamping block 5 extending in the left-right direction is provided in each positioning sleeve 6. Figure 6 As can be seen, the positioning sleeve 6 has a through hole, and two opposing limiting grooves 61 are formed on the sidewalls of the through hole. The clamping block 5 is specifically T-shaped, with two plug-ins 51 provided at its left end, which are inserted into the two limiting grooves 61 in a one-to-one correspondence. The clamping block 5 divides the outlet of the through hole (i.e., the right end of the through hole) into two semicircular cavities.

[0056] like Figure 2-3 、 Figure 5 and Figure 8 As shown, the synchronizer 7 includes a connecting shaft 72 extending in the left-right direction and three cantilever arms 71 evenly spaced along the circumference of the connecting shaft 72. The connecting shaft 72 is mounted in the first center hole 21 and the second center hole 32. The first and second center holes 21 and 32 both restrict radial displacement of the connecting shaft 72 but do not restrict axial movement of the connecting shaft 72 (i.e., left-right), allowing the synchronizer 7 to move left-right within the accommodating cavity. Each cantilever arm 72 is provided at the end of a tie rod 4. The left ends of the three tie rods 4 are correspondingly inserted into the three limiting holes 22, while the middle portions are correspondingly inserted into the three locating sleeves 6. The limiting holes 22 and locating sleeves 6 both restrict radial displacement of the tie rods 4 but do not restrict axial movement of the tie rods 4 (i.e., left-right). The tie rod 4 includes two opposing clamping blocks 41. Each clamping block 41 has a clamping end 42 connected to its right end. An open slot 43 for accommodating the clamping block 5 is formed between the two clamping blocks 41. In a natural state, the distance between the two clamping ends 42 is smaller than the distance between the two clamping blocks 41. The two clamping blocks 41 respectively pass through the two semicircular cavities of the through hole outlet of the positioning sleeve 6, so that the clamping block 5 is placed in the open groove 43.

[0057] In a specific embodiment of the present invention, Figure 3 、 Figure 5 and Figure 8As shown, a positioning ring 44 is fixed to the pull rod 4 and is covered with a washer 8. An opening is provided at the end of the cantilever 71. When installing the pull rod 4 at the end of the cantilever 71, the clamping end 42 and the clamping block 41 are first passed through the opening in sequence, so that the positioning ring 44 abuts one side of the opening. Then, the washer 8 is placed on the pull rod 4, so that the opening is located between the positioning ring 44 and the washer 8. This can limit the axial and radial displacement of the pull rod 4 in the opening and fix the relative position of the pull rod 4 on the cantilever 71.

[0058] Combine Figure 1 and Figure 8 It can be seen that the working principle of the utility model is as follows:

[0059] During operation, the mounting base 1 is fixed on the balancing machine so that the three pull rods 4 of the clamping mechanism are simultaneously inserted into the three bolt holes 101 of the transmission shaft 400. The central pull rod of the balancing machine passes through the first center hole 21 and the third center hole 11, and applies a pulling force to the left to the connecting shaft 72. The synchronizer 7 drives the three pull rods 4 to move toward the direction of the cover 2 (i.e., the left side). The two clamping ends 42 in each pull rod 4 are blocked by the right end of the block 5. At this time, the positioning sleeve 6 provides reverse support force for the block 5. The two clamping ends 42 are stretched apart by the block 5, and the pulling force is converted into a circumferential stretching force, that is, the distance between the two clamping ends 42 is increased, and the outer wall of the pull rod 4 is pressed against the inner wall of the bolt hole 101, thereby clamping the transmission shaft 400, and a dynamic balancing test can be performed. Due to assembly and manufacturing errors, the degree and speed of the expansion of the three pull rods 4 are inevitably not synchronized. This problem can be compensated by the stress deformation of the three cantilevers 71 in the synchronizer 7 to ensure that the three pull rods 4 can fully contact the three bolt holes 101.

[0060] The numbers of the bolt holes 101, the limiting holes 22, the mounting holes 31, the positioning sleeves 6, the clamping blocks 5 and the pull rods 4 are the same. Those skilled in the art may also adjust the numbers of the above components as needed.

[0061] 100 sets of dynamic balancing data of the original clamping mechanism were collected and compared with 100 sets of dynamic balancing data obtained by using the power-dividing dynamic balancing clamping mechanism of the utility model. The comparison results are as follows:

[0062]

[0063] The comparison results show that the average initial calibration of the new power-dividing dynamic balancing clamping mechanism is slightly longer than that of the original clamping mechanism. This may be due to the change from the original center hole positioning to three bolt holes positioning, which is more complex than the original positioning method and has resulted in a decrease in the accuracy of the patch. However, the difference between the average re-calibration and the average initial re-calibration of the new power-dividing dynamic balancing clamping mechanism has decreased, indicating that the test results of the new power-dividing dynamic balancing clamping mechanism are more accurate when positioned at different angles, and can more accurately reflect the vehicle installation and use conditions.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A dynamic balancing clamping mechanism with split power, characterized in that: include: a cover shell having a first central hole formed therein; a positioning plate, mounted on the housing, having a second center hole and a plurality of mounting holes evenly spaced along the circumference, the second center hole being coaxially arranged with the first center hole, a positioning sleeve being provided in the mounting hole, and a clamping block being provided in the positioning sleeve; a synchronizer, movably disposed between the housing and the positioning plate, comprising a connecting shaft and a plurality of cantilevers evenly spaced along the circumference of the connecting shaft, the connecting shaft being mounted in the first center hole and the second center hole, a pull rod being provided at the end of the cantilever, and the plurality of pull rods being disposed in a one-to-one correspondence in the plurality of positioning sleeves; The pull rod includes two clamping blocks arranged opposite to each other, each clamping block is provided with a clamping end, and an open groove for accommodating the clamping block is formed between the two clamping blocks; when the synchronizer drives the pull rod to move toward the direction of the cover, the two clamping ends are spread apart by the clamping blocks.

2. The power distribution dynamic balancing clamping mechanism according to claim 1, characterized in that: The cover shell is fixedly installed through a mounting seat.

3. The power distribution dynamic balancing clamping mechanism according to claim 1, characterized in that: The cover shell is further provided with a plurality of limiting holes evenly spaced along the circumferential direction, and the plurality of pull rods are arranged in the plurality of limiting holes in a one-to-one correspondence.

4. The power distribution dynamic balancing clamping mechanism according to claim 1, characterized in that: A limiting groove is provided on the positioning sleeve, and a plug-in is provided at one end of the clamping block, and the plug-in is inserted into the limiting groove.

5. The power-dividing dynamic balancing clamping mechanism according to claim 1, characterized in that: A positioning ring and a washer are respectively provided on the pull rod, and an opening is provided at the end of the cantilever, and the opening is located between the positioning ring and the washer.

6. The power distribution dynamic balancing clamping mechanism according to claim 1, characterized in that: The synchronizer includes three cantilevers.

7. The power distribution dynamic balancing clamping mechanism according to claim 1, characterized in that: The pull rod is inserted into the bolt hole of the transmission shaft.

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