Polishing auxiliary clamp for balance shaft support

Abstract

The invention belongs to the technical field of grinding clamps, and relates to a grinding auxiliary clamp for a balance shaft support. Comprising a base, the base is fixedly connected with a first electric push rod, the telescopic end of the first electric push rod is fixedly connected with a connecting rod, the connecting rod is fixedly connected with a fixed disc, the fixed disc is provided with ejector rods which are evenly distributed in the circumferential direction, and the fixed disc is rotationally connected with a rotating frame; and the sliding block is connected to the rotating frame in a sliding mode, the sliding block is connected with a sliding shell in a sliding mode, and a resistance spring is fixedly connected between the sliding block and the sliding shell. Resistance is applied to vertical sliding of the sliding shell through the resistance spring between the sliding block and the sliding shell, the initial horizontal height of the hand mill is limited, the hand mill is made to be rapidly and stably attached to the balance shaft support at the starting moment, the time for the hand mill to be in the dynamic balance state from the starting state and start to conduct grinding is shortened, and the grinding efficiency is improved. Therefore, the influence of the vibration of the hand mill on the arm of an operator is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of grinding fixtures, and in particular to a grinding auxiliary fixture for a balancing shaft bracket. Background Art

[0002] The balance shaft bracket is a key component of the vehicle's powertrain system. During the use of the balance shaft bracket, the balance shaft bracket is affected by the sulfur compounds in the engine oil, and a large amount of corrosion layer will be generated on the surface, resulting in a decrease in surface hardness, and even fatigue fracture under long-term alternating loads. The probability of damage to the balance shaft bracket due to non-polishing is as high as 3.2%, the probability of joint damage to the balance shaft is as high as 18.7%, and the probability of seal failure is as high as 42.5%. The input-output ratio (ROI) of grinding and maintenance can reach 1:8.5, which is a key measure to avoid systemic risks. Therefore, it is necessary to grind the balance shaft bracket regularly and maintain the polished balance shaft bracket. The structural shapes of existing balance shaft brackets are irregular and diverse. Generally, a hand grinder is used to grind the balance shaft bracket, which requires the balance shaft bracket to be fixed in advance with an auxiliary clamp.

[0003] During the development process, we found that: 1. The existing clamp will directly clamp the balance shaft bracket to prevent the clamp and the balance shaft bracket from shaking. When the hand grinder is started, it accelerates from a standstill to a high speed (usually more than 10,000 revolutions), which will cause the rotational centrifugal force of the motor rotor on the hand grinder to increase sharply. Therefore, the hand grinder will produce a large amplitude of vibration at the moment of opening, and the existing clamp and balance shaft bracket cannot buffer the vibration generated by the hand grinder, which will lead to low stability of the hand grinder, causing discomfort in the operator's arm when using it, and even causing the hand grinder to slip out of the hand.

[0004] 2. During the grinding process, hand grinders are prone to recoil. The recoil phenomenon refers to the situation where when the grinding wheel or cutting disc of a hand grinder is obstructed, the rotational kinetic energy of the grinding wheel will suddenly be converted into a reverse impact force, causing the handle of the hand grinder to instantly rotate around the rotation axis of the grinding wheel, causing the hand grinder to instantly lose control and bounce up, thereby affecting the safety of the operator.

[0005] Based on this, our R&D personnel proposed a grinding auxiliary fixture for the balance shaft bracket to stabilize the grinding of the balance shaft bracket. Summary of the invention

[0006] In order to overcome the shortcomings pointed out in the above background technology, the present invention provides a grinding auxiliary fixture for a balance shaft bracket.

[0007] The technical solution of the present invention is: a grinding auxiliary fixture for a balance shaft bracket, comprising: Base, the base is fixedly connected with a first electric push rod, the telescopic end of the first electric push rod is fixedly connected with a connecting rod, the connecting rod is fixedly connected with a fixed disk, the fixed disk is provided with ejector rods evenly distributed in the circumferential direction, and the fixed disk is rotatably connected with a rotating frame; Slider, slidably connected to the rotating frame, the slider is slidably connected with a sliding housing, a resistance spring is fixedly connected between the slider and the sliding housing, the sliding housing is provided with a sliding rod, a universal joint is installed on the sliding rod, and the universal joint is detachably connected with a hoop.

[0008] Further explanation, the base is fixedly connected with a second electric push rod, the telescopic rod of the second electric push rod is fixedly connected with a support ring, the sliding rod is fixedly connected with a frustum-shaped trigger block, a trigger rod is slidably connected in the sliding housing, the trigger block is in contact with the trigger rod, the trigger block is used to squeeze the trigger rod to move, a pressure sensor is installed in the sliding housing, an elastic member is fixedly connected between the trigger rod and the pressure sensor, the trigger rod squeezes the pressure sensor through the elastic member, the sliding housing is fixedly connected with symmetrically distributed liquid sacs, the sliding rod slides horizontally and rotates on the sliding housing, and the symmetrically distributed liquid sacs are respectively located on both sides of the sliding rod, so that when the sliding rod slides, the liquid sacs are squeezed by the sliding rod, and a damping liquid is arranged in the liquid sacs to apply resistance to the sliding of the sliding rod.

[0009] Further explanation, the number of the ejector rods is an even number and at least four, a connecting rod is fixedly connected between two ejector rods at the diagonal corners, the ejector rods are slidably connected with the fixed disk, and a knob is threadedly connected to one of the ejector rods on the same connecting rod.

[0010] Further explanation, the connecting rod is fixedly connected with a positioning block, and the axis of the positioning block, the axis of the fixed disk and the axis of the support ring are collinear.

[0011] Further explanation, the positioning block is frustum-shaped, and the diameter of the positioning block gradually increases from top to bottom.

[0012] Further explanation, on the same horizontal plane, the distance from the axis of the fixed disk to the farthest point on the rotating frame is A, the distance from the axis of the fixed disk to the farthest point on the connecting rod is B, the thickness of the connecting rod is C, and B - C > A.

[0013] Further explanation, a motor is fixedly connected inside the positioning block, and an output shaft of the motor is fixedly connected with a grinding member, and the grinding member is located above the positioning block.

[0014] Further explanation, a flexible block is fixedly connected to one side of the ejector rod close to the support ring.

[0015] Further explanation: The contact surfaces between the liquid sac and the sliding rod are all rough surfaces.

[0016] Further explanation: There is resistance between the rotating frame and the fixed disk, and the resistance suffered by the sliding of the sliding rod is less than the resistance required for the rotation of the rotating frame.

[0017] The beneficial effects of the present invention are as follows: 1. Through the resistance spring between the sliding block and the sliding housing, resistance is applied to the up and down sliding of the sliding housing, restricting the initial horizontal height of the hand grinder, enabling the hand grinder to quickly and stably adhere to the balance shaft bracket instantly when it is turned on, reducing the time from the start state of the hand grinder to the dynamic balance state and starting to grind, thereby reducing the impact of the vibration of the hand grinder on the operator's arm; 2. Through the horizontal sliding of the sliding rod, the trigger block is driven to squeeze the trigger rod. When the hand grinder has a recoil phenomenon, the pressure received by the pressure sensor is adjusted. The telescopic rod of the second electric push rod drives the support ring to move downward, and the balance shaft bracket moves downward under the influence of its own gravity, causing the balance shaft bracket to quickly move away from the hand grinder. After the balance shaft bracket quickly moves away from the hand grinder, the hand grinder no longer continues to produce a recoil phenomenon and resumes dynamic balance. The telescopic rod of the second electric push rod drives the support ring to reset, causing the balance shaft bracket to slowly reset. The corrosion layer and structural protrusions on the balance shaft bracket gradually come into active contact with the grinding wheel of the hand grinder, gradually grinding the corrosion layer and structural protrusions on the balance shaft bracket to reduce the risk of recoil when the side of the grinding wheel of the hand grinder contacts the corrosion layer and structural protrusions, and improving the safety of the hand grinder during grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a three-dimensional structural schematic diagram of the fixed disk of the present invention; Figure 3 is a three-dimensional structural schematic diagram of the hoop of the present invention; Figure 4 is a three-dimensional structural schematic diagram of the motor and the grinding part of the present invention; Figure 5 is a three-dimensional structural schematic diagram of the liquid sac of the present invention; Figure 6 is a three-dimensional structural schematic diagram of the trigger block and the trigger rod of the present invention.

[0019] The markings in the figure are: 1 - base, 2 - first electric push rod, 3 - connecting rod, 4 - fixed disk, 401 - ejector rod, 5 - rotating frame, 6 - sliding block, 7 - sliding housing, 8 - sliding rod, 9 - universal joint, 10 - hoop, 11 - second electric push rod, 12 - support ring, 13 - trigger block, 14 - trigger rod, 15 - pressure sensor, 16 - liquid sac, 17 - connecting rod, 18 - knob, 19 - positioning block, 20 - motor, 21 - grinding piece, 22 - flexible block. Detailed implementation manner

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners, but the protection scope and application scope of the present invention are not limited. Embodiment 1

[0021] This embodiment discloses a grinding auxiliary fixture for a balance shaft bracket, which is used to assist in fixing the balance shaft bracket when an operator uses a hand grinder to grind the balance shaft bracket.

[0022] As Figures 1 - 5As shown in the figure, it includes: a base 1, a control terminal (not shown in the figure) is provided on the base 1, a first electric push rod 2 electrically connected to the control terminal is fixedly connected to the base 1, a connecting rod 3 is fixedly connected to the telescopic end of the first electric push rod 2, and the first electric push rod 2 is used to drive the connecting rod 3 to move up and down. A fixed disk 4 is fixedly connected to the connecting rod 3, and the connecting rod 3 is used to drive the fixed disk 4 to move upward. The fixed disk 4 is provided with ejector rods 401 evenly distributed in the circumferential direction. In this example, the balance shaft bracket is directly pressed between the ejector rods 401 and the base 1. Before clamping the balance shaft bracket, the connecting rod 3 drives the fixed disk 4 to move upward, and the fixed disk 4 drives all the ejector rods 401 to move upward, adjusting the distance between the ejector rods 401 and the base 1 to a size that allows the balance shaft bracket to be placed. Then, the balance shaft bracket is placed between the ejector rods 401 and the base 1. When clamping the balance shaft bracket, the connecting rod 3 drives all the ejector rods 401 to move downward through the fixed disk 4, and the ejector rods 401 press the balance shaft bracket against the base 1. The fixed disk 4 is rotatably connected to a rotating frame 5; a sliding block 6, which is slidably connected to the rotating frame 5, and the sliding block 6 is slidably connected to a sliding housing 7. A resistance spring is fixedly connected between the sliding block 6 and the sliding housing 7, and the resistance spring between the sliding block 6 and the sliding housing 7 is used to increase the resistance when the sliding housing 7 slides up and down. The sliding housing 7 is provided with a sliding rod 8, a universal joint 9 is installed on the sliding rod 8, and the universal joint 9 is detachably connected to a hoop 10. Before grinding the balance shaft bracket, a hand grinder is installed on the hoop 10, and the abrasive disc of the hand grinder is made to fit the upper surface of the balance shaft bracket to grind the surface of the balance shaft bracket. During the process of grinding the balance shaft bracket, by manually driving the rotating frame 5 to rotate, the rotating frame 5 drives the sliding block 6, the sliding housing 7, the sliding rod 8, the universal joint 9, the hoop 10 and the hand grinder to rotate around the axis of the fixed disk 4. By sliding the sliding block 6 horizontally along the rotating frame 5, the sliding block 6, the sliding housing 7, the sliding rod 8, the universal joint 9, the hoop 10 and the hand grinder all slide horizontally along the rotating frame 5. By sliding the sliding housing 7 up and down along the sliding block 6, the sliding housing 7, the sliding rod 8, the universal joint 9, the hoop 10 and the hand grinder all slide up and down along the sliding block 6. By adjusting the inclination angle of the hoop 10 through the universal joint 9, the inclination angle of the hand grinder is changed. Through the above steps, the position and inclination angle of the hand grinder are adjusted.

[0023] On the same horizontal plane, the distance from the axis of the fixed disk 4 to the farthest point on the rotating frame 5 is A, the distance from the axis of the fixed disk 4 to the farthest point on the connecting rod 3 is B, and the thickness of the connecting rod 3 in its rear projection is C, and B - C > A. During the rotation of the rotating frame 5, it does not contact the connecting rod 3.

[0024] The usage process of the grinding auxiliary fixture in this embodiment is as follows: Before use: Control the first electric push rod 2 through the control terminal, so that the telescopic end of the first electric push rod 2 drives the connecting rod 3 to move upward. The connecting rod 3 drives the fixed disk 4 to move upward, and the fixed disk 4 drives all the ejector rods 401 to move upward. Adjust the distance between the ejector rods 401 and the base 1 to a degree that allows the balance shaft bracket to be placed. Then place the balance shaft bracket between the ejector rods 401 and the base 1, and subsequently install the hand grinder on the hoop 10.

[0025] Start using: First, through the control terminal, open the telescopic end of the first electric push rod 2 to move downward. The telescopic end of the first electric push rod 2 drives the fixed disk 4 to move downward through the connecting rod 3. The fixed disk 4 drives all the ejector rods 401 to move downward. The ejector rods 401 move downward and press the balance shaft bracket, clamping the balance shaft bracket between the ejector rods 401 and the base 1. At this time, the operator closes the first electric push rod 2 through the control terminal.

[0026] Then the operator determines that the switch of the hand grinder is in the off state. The operator plugs in the power cord of the hand grinder, turns on the switch of the hand grinder, and uses the hand grinder to grind the balance shaft bracket. Through the movement of the rotating frame 5, the sliding block 6, the sliding housing 7, the sliding rod 8, the universal joint 9, and the hoop 10, during the use of the hand grinder, it can rotate around the axis of the fixed disk 4, slide horizontally along the rotating frame 5, slide up and down along the sliding block 6, and adjust the inclination angle of the hoop 10, thereby changing the inclination angle of the hand grinder. Through the above steps, the position and inclination angle of the hand grinder are adjusted.

[0027] When the balance shaft bracket needs to be ground, since the hand grinder accelerates from rest to high speed (usually over ten thousand revolutions per minute) instantaneously when starting, it will cause a sharp increase in the rotational centrifugal force of the motor rotor on the hand grinder. Therefore, the hand grinder will generate a large amplitude of vibration at the moment of starting. Until it reaches the dynamic balance state, the vibration amplitude of the hand grinder will be greatly reduced. Through the resistance spring between the sliding block 6 and the sliding housing 7, resistance is applied to the up and down sliding of the sliding housing 7, so that the up and down movement of the sliding rod 8, the universal joint 9, the hoop 10, and the hand grinder is blocked, restricting the initial horizontal height of the hand grinder, enabling the hand grinder to quickly and stably adhere to the balance shaft bracket at the moment of starting, reducing the time from the starting state of the hand grinder to the dynamic balance state and starting to grind, thereby reducing the impact of the hand grinder vibration on the operator's arm.

[0028] When the grinding is completed, the operator turns off the switch of the hand grinder and unplug the power cord of the hand grinder, and controls the telescopic end of the first electric push rod 2 to move upward through the control terminal. The telescopic end of the first electric push rod 2 drives the fixed disk 4 to move upward through the connecting rod 3. The fixed disk 4 drives all the ejector rods 401 to move upward. The ejector rods 401 no longer press the balance shaft bracket, and the operator removes the balance shaft bracket. Finally, the above steps can be repeated to grind the other side of the balance shaft bracket.

[0029] If it is necessary to grind the side surface of the balance shaft bracket, remove the hand grinder after turning off the switch from the hoop 10, then turn the hand grinder 90° and reinstall it on the hoop 10 so that the grinding wheel of the hand grinder is close to the side surface of the balance shaft bracket, and repeat the above steps to grind the side surface of the balance shaft bracket. Embodiment 2

[0030] This embodiment discloses a grinding auxiliary fixture for a balance shaft bracket. On the basis of Embodiment 1, it also has an emergency treatment structure when the grinding wheel on the hand grinder is blocked, resulting in the handle of the hand grinder shaking.

[0031] Such as Figures 1 - 3 、 Figure 5 And Figure 6As shown in the figure, the base 1 is fixedly connected with a second electric push rod 11 electrically connected to the control terminal. The telescopic rod of the second electric push rod 11 is fixedly connected with a support ring 12. The telescopic end of the second electric push rod 11 is used to drive the support ring 12 to move up and down. A hole is provided in the middle of the support ring 12. In the above embodiment, the balance shaft bracket is placed on the base 1. In this embodiment and the following embodiments, the balance shaft bracket is placed on the support ring 12. The upper surface area of the support ring 12 is smaller than the upper surface area of the base 1 to reduce the placement area of the balance shaft bracket, so that the balance shaft bracket with an irregular lower surface can be stably placed. The sliding rod 8 is fixedly connected with a frustum-shaped trigger block 13. The diameter of the trigger block 13 gradually increases from top to bottom. The sliding rod 8 is used to drive the trigger block 13 to move horizontally. A trigger rod 14 is slidably connected in the sliding housing 7. An inclined surface is provided on the lower side of the trigger rod 14. The trigger block 13 is in contact with the inclined surface of the trigger rod 14. The trigger block 13 is used to squeeze the trigger rod 14 to move. During the grinding process, if the hand grinder generates a recoil phenomenon, the recoil phenomenon means that when the grinding wheel or cutting disc of the hand grinder is blocked, the rotational kinetic energy of the grinding wheel will suddenly be converted into a reverse impact force, causing the handle of the hand grinder to instantaneously rotate around the rotation axis of the grinding wheel, resulting in the hand grinder being instantly out of control and bouncing up. At this time, the handle of the hand grinder swings and drives the sliding rod 8 to move horizontally through the hoop 10 and the universal joint 9. Generally, the rotation direction of the hand grinder is fixed, so the direction of the handle swinging when the hand grinder shakes is also single. The sliding rod 8 only drives the trigger block 13 to move towards the trigger rod 14, causing the trigger block 13 to squeeze the trigger rod 14 to move upward. A pressure sensor 15 electrically connected to the control terminal is installed in the sliding housing 7. An elastic member is fixedly connected between the trigger rod 14 and the pressure sensor 15. The elastic member is a compression spring. The trigger rod 14 squeezes the pressure sensor 15 through the elastic member. Once the pressure sensor 15 is pressed, the control terminal will control the telescopic rod of the second electric push rod 11 to contract. The sliding housing 7 is fixedly connected with liquid sacs 16 symmetrically distributed front and back. The sliding rod 8 slides horizontally and rotates on the sliding housing 7. The symmetrically distributed liquid sacs 16 are respectively located on the front and back sides of the sliding rod 8, so that when the sliding rod 8 slides, the liquid sacs 16 are squeezed by the sliding rod 8. The liquid sacs 16 are provided with damping liquid to apply resistance to the sliding of the sliding rod 8.

[0032] The contact surfaces between the liquid sacs 16 and the sliding rod 8 are all rough surfaces to increase the resistance when the sliding rod 8 rotates and slides horizontally.

[0033] There is resistance between the rotating frame 5 and the fixed disk 4. The resistance of the sliding rod 8 to slide is less than the resistance required for the rotating frame 5 to rotate. When the sliding rod 8 is subjected to an instantaneous impact force, the sliding rod 8 will quickly slide horizontally and squeeze the liquid sacs 16, and will not cause the rotating frame 5 to rotate along the fixed disk 4.

[0034] The emergency treatment process when the handle of the hand grinder shakes in this embodiment is as follows: During the process of grinding the balance shaft bracket with a hand grinder, if there are corrosion layers and structural protrusions of varying degrees on the upper surface of the balance shaft bracket, the resistance received by the grinding wheel of the hand grinder changes during movement, resulting in a recoil phenomenon of the hand grinder. Then, the handle of the hand grinder will swing, and drive the sliding rod 8 to move horizontally through the hoop 10 and the universal joint 9. The front liquid bladder 16 is compressed. The sliding rod 8 drives the trigger block 13 to move. The trigger block 13 squeezes the trigger rod 14 to move upward. The trigger rod 14 squeezes the pressure sensor 15 through the elastic member, increasing the extrusion force received by the pressure sensor 15. The pressure sensor 15 transmits an electrical signal to the control terminal. The control terminal controls the telescopic rod of the second electric push rod 11 to move downward. The telescopic rod of the second electric push rod 11 drives the support ring 12 to move downward. During the process of the telescopic rod of the second electric push rod 11 driving the support ring 12 to move downward, the telescopic end of the first electric push rod 2 drives the fixed disk 4 to move downward through the connecting rod 3. The fixed disk 4 drives all the ejector rods 401 downward. The ejector rods 401 keep pressing on the balance shaft bracket to prevent the balance shaft bracket from shaking. Affected by the push of the ejector rods 401 and its own gravity, the balance shaft bracket moves downward, causing the balance shaft bracket to quickly move away from the hand grinder. The grinding wheel of the hand grinder is no longer blocked and returns to its initial dynamic balance state, so that the handle of the hand grinder is no longer affected by torque.

[0035] After the balance shaft bracket quickly moves away from the hand grinder, the hand grinder resumes dynamic balance. The operator controls the movement of the hand grinder and the liquid bladder 16 no longer deforms, causing the hand grinder to drive the sliding rod 8, the universal joint 9, and the hoop 10 to all move. The sliding rod 8 drives the trigger block 13 to move. The trigger block 13 no longer presses on the trigger rod 14. The elastic member of the trigger rod 14 rebounds, and the trigger rod 14 moves downward. The pressure sensor 15 is no longer pressed. The control terminal controls the telescopic rod of the second electric push rod 11 to slowly extend. The telescopic rod of the second electric push rod 11 drives the support ring 12 to slowly move upward. The support ring 12 drives the balance shaft bracket to move upward. After the telescopic rod of the second electric push rod 11 extends to the reset state, the control terminal turns off the second electric push rod 11. The corrosion layer and structural protrusions on the balance shaft bracket gradually come into active contact with the grinding wheel of the hand grinder, and gradually grind the corrosion layer and structural protrusions of the balance shaft bracket to reduce the risk of recoil when the side of the grinding wheel of the hand grinder contacts the corrosion layer and structural protrusions, and improve the safety during the grinding of the hand grinder.

[0036] During the process of grinding the side of the balance shaft bracket, if the grinding wheel of the hand grinder has a recoil phenomenon, the handle of the hand grinder will swing vertically. At this time, the resistance spring between the sliding block 6 and the sliding housing 7 buffers the swing of the hand grinder to reduce the swing amplitude when the hand grinder has a recoil phenomenon, thereby improving the safety during the grinding of the hand grinder. Embodiment 3

[0037] This embodiment discloses a grinding auxiliary fixture for a balance shaft bracket. On the basis of Embodiment 2, it also has the function of grinding the clamped part of the balance shaft bracket.

[0038] As Figure 3 shown in Figure 4 the figure, the number of ejector rods 401 is an even number and at least four. A connecting rod 17 is fixedly connected between two ejector rods 401 at diagonal corners. Taking four ejector rods 401 as an example, the ejector rods 401 are slidably connected to the fixed disk 4. One of the ejector rods 401 on the same connecting rod 17 is threadedly connected to a knob 18. A threaded groove is provided on the ejector rod 401 of the knob 18, and a threaded protrusion is provided on the knob 18, so that the ejector rod 401 can slide on the fixed disk 4. By rotating the knob 18, the adjacent ejector rods 401 move up and down. The ejector rods 401 drive the ejector rods 401 at their diagonal corners to move up and down through the connecting rod 17. By alternately rotating the two knobs 18, after two ejector rods 401 move upward, the other two diagonally distributed ejector rods clamp the balance shaft bracket, so that the clamped position on the upper surface of the balance shaft bracket is exposed, facilitating grinding of the clamped position of the balance shaft bracket.

[0039] A flexible block 22 is fixedly connected to the lower side of the ejector rod 401. The upper surface of the balance shaft bracket is fitted by the deformation of the flexible block 22. When there is a corrosion layer and structural protrusions on the upper surface, resulting in an uneven surface, the deformation amounts of all the flexible blocks 22 are different, so that the upper surface of the balance shaft bracket and the lower surface of the fixed disk 4 remain parallel. Embodiment 4

[0040] This embodiment discloses a grinding auxiliary fixture for a balance shaft bracket. On the basis of Embodiment 3, it also has the function of automatically positioning and grinding the shaft hole of the balance shaft bracket.

[0041] As Figure 3 shown in Figure 4 the figure, a positioning block 19 is fixedly connected to the connecting rod 3. The connecting rod 3 is used to drive the positioning block 19 to move up and down. The axis of the positioning block 19, the axis of the fixed disk 4 and the axis of the support ring 12 are collinear. A motor 20 electrically connected to the control terminal is fixedly connected inside the positioning block 19. An output shaft of the motor 20 is fixedly connected with a grinding member 21. The grinding member 21 is a brush disc, and the diameter of the grinding member 21 is larger than the diameter of the shaft hole of the balance shaft bracket. The grinding member 21 is located above the positioning block 19.

[0042] The positioning block 19 is frustum-shaped, and its diameter gradually increases from top to bottom.

[0043] The minimum diameter of the positioning block 19 is smaller than the diameter of the shaft hole of the balance shaft bracket, and the maximum diameter of the positioning block 19 is larger than the diameter of the shaft hole of the balance shaft bracket.

[0044] In this embodiment, the steps for positioning and grinding the shaft hole of the balance shaft bracket are as follows: When it is necessary to grind the shaft hole of the balance shaft bracket, the operator adjusts the height of the ejector rod 401 by rotating the knob 18. The ejector rod 401 of the knob 18 drives the ejector rod 401 at the diagonal corner to move through the connecting rod 17, so that the ejector rod 401 drives the flexible block 22 to move upward to the limit position. After the distance between the support ring 12 and the flexible block 22 is sufficient to place the balance shaft bracket, the operator places the balance shaft bracket between the support ring 12 and the flexible block 22, and sets the shaft hole of the balance shaft bracket on the positioning block 19. The grinding part 21 is located above the balance shaft bracket. The operator turns on the first electric push rod 2 through the control terminal. The telescopic end of the first electric push rod 2 drives the positioning block 19 to move upward through the connecting rod 3. The positioning block 19 gradually adheres to and presses the inner wall of the balance shaft bracket, making the axis of the balance shaft bracket collinear with the axis of the positioning block 19, and positioning the shaft hole of the balance shaft bracket.

[0045] After the positioning of the balance shaft bracket is completed, the operator controls the telescopic end of the first electric push rod 2 to move downward through the control terminal. The telescopic end of the first electric push rod 2 drives the connecting rod 3 to move downward. The connecting rod 3 drives the fixed disk 4 and the positioning block 19 to move downward. The fixed disk 4 drives all the ejector rods 401 to move downward. The positioning block 19 drives the motor 20 and the grinding part 21 to move downward. The operator turns on the motor 20 through the control terminal. The output shaft of the motor 20 drives the grinding part 21 to rotate, and the grinding part 21 moves from top to bottom to grind the inner wall of the shaft hole of the balance shaft bracket.

[0046] After the inner wall of the shaft hole of the balance shaft bracket is ground, the operator controls the first electric push rod 2 to reset through the control terminal, and turns off the first electric push rod 2 and the motor 20.

[0047] In summary, the above is only a preferred embodiment of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A grinding auxiliary fixture for a balance shaft bracket, characterized in that, It includes: A base (1), the base (1) is fixedly connected with a first electric push rod (2), the telescopic end of the first electric push rod (2) is fixedly connected with a connecting rod (3), the connecting rod (3) is fixedly connected with a fixed disk (4), the fixed disk (4) is provided with ejector rods (401) evenly distributed in the circumferential direction, and the fixed disk (4) is rotatably connected with a rotating frame (5); A sliding block (6), which is slidably connected to the rotating frame (5), the sliding block (6) is slidably connected with a sliding housing (7), a resistance spring is fixedly connected between the sliding block (6) and the sliding housing (7), the sliding housing (7) is provided with a sliding rod (8), a universal joint (9) is installed on the sliding rod (8), and the universal joint (9) is detachably connected with a hoop (10).

2. The grinding auxiliary fixture for a balance shaft bracket according to claim 1, characterized in that The base (1) is fixedly connected with a second electric push rod (11), the telescopic rod of the second electric push rod (11) is fixedly connected with a support ring (12), the sliding rod (8) is fixedly connected with a frustum-shaped trigger block (13), a trigger rod (14) is slidably connected in the sliding housing (7), the trigger block (13) is in contact with the trigger rod (14), the trigger block (13) is used to squeeze the trigger rod (14) to move, a pressure sensor (15) is installed in the sliding housing (7), an elastic member is fixedly connected between the trigger rod (14) and the pressure sensor (15), the trigger rod (14) squeezes the pressure sensor (15) through the elastic member, the sliding housing (7) is fixedly connected with symmetrically distributed liquid sacs (16), the sliding rod (8) slides horizontally and rotates on the sliding housing (7), and the symmetrically distributed liquid sacs (16) are respectively located on both sides of the sliding rod (8), so that when the sliding rod (8) slides, the liquid sacs (16) are squeezed by the sliding rod (8), and damping liquid is provided in the liquid sacs (16) to apply resistance to the sliding of the sliding rod (8).

3. The grinding auxiliary fixture for a balance shaft bracket according to claim 1, characterized in that, The number of the ejector rods (401) is an even number and at least four, a connecting rod (17) is fixedly connected between two ejector rods (401) at the diagonal corners, the ejector rods (401) are slidably connected with the fixed disk (4), and a knob (18) is threadedly connected to one of the ejector rods (401) on the same connecting rod (17).

4. The grinding auxiliary fixture for a balance shaft bracket according to claim 3, characterized in that, The connecting rod (3) is fixedly connected with a positioning block (19), and the axis of the positioning block (19), the axis of the fixed disk (4) and the axis of the support ring (12) are collinear.

5. The grinding auxiliary fixture for a balance shaft bracket according to claim 4, characterized in that, The positioning block (19) is frustum-shaped, and the diameter of the positioning block (19) gradually increases from top to bottom.

6. The grinding auxiliary fixture for a balance shaft bracket according to claim 5, characterized in that, On the same horizontal plane, the distance from the axis of the fixed disk (4) to the farthest point on the rotating frame (5) is A, the distance from the axis of the fixed disk (4) to the farthest point on the connecting rod (3) is B, the thickness of the connecting rod (3) is C, and B - C > A.

7. A grinding auxiliary fixture for a balance shaft bracket according to claim 5, characterized in that, A motor (20) is fixedly connected inside the positioning block (19), and an output shaft of the motor (20) is fixedly connected with a grinding member (21), and the grinding member (21) is located above the positioning block (19).

8. A grinding auxiliary fixture for a balance shaft bracket according to claim 3, characterized in that, A flexible block (22) is fixedly connected to one side of the ejector rod (401) close to the support ring (12).

9. The grinding auxiliary fixture for a balance shaft bracket according to claim 2, characterized in that, The contact surfaces between the liquid sac (16) and the sliding rod (8) are all rough surfaces.

10. The grinding auxiliary fixture for a balance shaft bracket according to claim 9, characterized in that, There is resistance between the rotating frame (5) and the fixed disk (4), and the resistance suffered by the sliding of the sliding rod (8) is less than the resistance required for the rotation of the rotating frame (5).

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