Grinding machine equipment grinding wheel dismounting and mounting tool

Abstract

This application relates to the technical field of machining, specifically disclosing a grinding wheel assembly / disassembly fixture for a grinding machine. The fixture includes a spindle wrench assembly, a flange wrench assembly, and a linkage mechanism. The spindle wrench assembly is disposed on the end face of the grinding machine spindle and threadedly connected to it. The flange wrench assembly is fitted onto the outer circumferential surface of the grinding wheel flange and threadedly connected to it. The linkage mechanism drives the spindle wrench assembly and the flange wrench assembly together, so that when the spindle wrench assembly rotates, it drives the flange wrench assembly to rotate synchronously in the opposite direction. This application achieves efficient grinding wheel assembly / disassembly, improves operational safety and reliability, reduces the frequency of grinding machine spindle bearing damage, shortens the time required for employees to change grinding wheels, and improves production efficiency.

Description

Technical Field

[0001] This application relates to the technical field of machining, and in particular to a tooling for disassembling and assembling grinding wheels in a grinding machine. Background Technology

[0002] In the modern machining industry, grinding machines, as an important processing equipment, are widely used in the precision grinding of various parts. With the continuous development of the manufacturing industry, the requirements for the machining accuracy, efficiency, and safety of grinding machines are also increasing. As a key component of the grinding machine, the ease of assembly and disassembly of the grinding wheel directly affects the machine's performance and production efficiency. Efficient and reliable grinding wheel assembly and disassembly technology is of great significance for improving the overall level of the machining industry. It can reduce equipment downtime, increase production efficiency, reduce production costs, while ensuring machining accuracy and product quality, thus driving the entire industry towards greater automation, intelligence, and efficiency.

[0003] In the past, different methods were used for disassembling and assembling grinding wheels for different sizes of grinding machines. For small and medium-sized cylindrical grinders and universal grinders, grinding wheel disassembly and assembly were mostly done manually, with operators relying on their own strength and experience. Large grinding machines, on the other hand, typically used a mechanical puller method, applying pulling force with mechanical tools to remove the grinding wheel. Additionally, when replacing grinding wheels, a hammering method was sometimes used, but this method generated considerable noise. Furthermore, disassembling and assembling parts often required considerable brute force from the operator. During installation, the bolts needed to be tightened evenly and simultaneously onto the grinding machine spindle face, usually requiring two or more people to work together.

[0004] However, these existing methods for disassembling and assembling grinding wheels have many drawbacks. Manual disassembly and assembly are extremely labor-intensive, requiring a significant amount of time. Furthermore, due to human error, the installation force is difficult to control, leading to low efficiency. While the mechanical puller method reduces labor intensity to some extent, the operation is complex, and even slight imbalances in the bolts can prevent completion. The hammering method is not only noisy but also prone to loosening and damaging the equipment cover, reducing flange lifespan and spindle accuracy. When multiple people are working together, improper coordination can easily lead to various problems, even damaging the grinding machine spindle, causing accuracy errors, equipment damage, and economic losses. Additionally, these methods have low production efficiency and safety, poor versatility, and are difficult to adapt to different operators. This problem urgently needs to be solved. Summary of the Invention

[0005] To overcome the above-mentioned technical problems, this application provides a grinding wheel disassembly and assembly fixture for a grinding machine.

[0006] This application provides a grinding wheel disassembly and assembly fixture for a grinding machine, which adopts the following technical solution: A grinding wheel assembly / disassembly fixture for a grinding machine includes a spindle wrench assembly, a flange wrench assembly, and a linkage mechanism. The spindle wrench assembly is disposed on the end face of the grinding machine spindle and threadedly connected to the grinding machine spindle. The flange wrench assembly is sleeved on the outer circumferential surface of the grinding wheel flange and threadedly connected to the flange. The linkage mechanism drives the spindle wrench assembly and the flange wrench assembly to rotate synchronously in opposite directions when the spindle wrench assembly rotates.

[0007] By adopting the above technical solution, when the operator operates the spindle wrench assembly, the flange wrench assembly can be driven to move efficiently, realizing the rapid disassembly and assembly of the grinding wheel. This helps to avoid various drawbacks caused by uneven installation force in traditional methods, reduces damage to the grinding machine spindle, and improves disassembly and assembly efficiency.

[0008] Preferably, the linkage connection mechanism includes a planetary gear set and a three-way synchronous locking structure. The planetary gear set is connected between the spindle wrench assembly and the flange wrench assembly. The three-way synchronous locking structure includes three wedge blocks evenly distributed in a ring. The wedge blocks are radially slidably disposed on the inner sidewall of the flange wrench assembly. The planetary gear set drives the wedge blocks to move synchronously to clamp the inner hole of the grinding wheel.

[0009] By adopting the above technical solution, the planetary gear set can transmit the rotation of the spindle wrench assembly to the flange wrench assembly, achieving synchronous rotation of the two in opposite directions. At the same time, the planetary gear set drives the three wedge blocks to move synchronously to clamp the inner hole of the grinding wheel, which helps to improve clamping stability.

[0010] Preferably, each of the wedge blocks is provided with two sets of preload springs and retractable ejector pins at the rear. The ends of the ejector pins contact the wedge blocks. The preload springs limit the position of the retractable ejector pins by adjusting bolts. The retractable ejector pins automatically extend and retract according to the contact pressure of the wedge blocks to maintain a constant clamping force.

[0011] By adopting the above technical solution, the preload spring provides a stable preload force. When the wedge block clamps the inner hole of the grinding wheel, the telescopic pin automatically extends and retracts with the change of contact pressure of the wedge block to maintain a constant clamping force, thus making it applicable to grinding wheels of different thicknesses and improving applicability.

[0012] Preferably, the spindle wrench assembly includes a ratchet handle and a two-way anti-loosening ratchet device. The two-way anti-loosening ratchet device is located at the pivot of the ratchet handle. The two-way anti-loosening ratchet device includes a forward-engaging ratchet disc and a reverse-locking button. The forward-engaging ratchet disc locks the forward rotation torque, and the reverse-locking button releases the reverse rotation lock when pressed.

[0013] By adopting the above technical solution, when the operator rotates the ratchet handle in the forward direction, the forward-rotating ratchet disc can ensure stable torque transmission, enabling the tightening or loosening of the spindle nut. After pressing the reverse safety button, the reverse rotation lock can be released, thus ensuring safe operation when reverse operation is required.

[0014] Preferably, the bidirectional anti-loosening ratchet device further includes an overload protection clutch, which has a built-in shear pin. When the main shaft wrench assembly is subjected to a force exceeding a preset threshold, the shear pin breaks and triggers a reset mechanism.

[0015] By adopting the above technical solution, when the force is too great, the shear pin breaks, which can prevent further damage to the equipment and thus play a protective role. After the shear pin breaks, the reset mechanism is triggered, so that it automatically returns to the initial state, which facilitates subsequent operation.

[0016] Preferably, the spindle wrench assembly has a positioning notch at its end, which engages with the fixing screw of the grinding machine spindle cover, and the flange wrench assembly has an annular positioning platform with anti-slip texture on its outer edge.

[0017] By adopting the above technical solution, the positioning notch is engaged with the fixing screw of the grinding machine spindle cover, which helps to ensure the stability of the spindle wrench assembly during operation, preventing it from shaking or shifting. The annular positioning platform is convenient for operators to hold and operate, while the anti-slip texture prevents hand slippage, thereby improving the safety of operation.

[0018] Preferably, the wedge block is made of tungsten carbide alloy with a bevel angle ranging from 15° to 25°, and a self-lubricating bearing guide sleeve is provided between the wedge block and the flange wrench assembly.

[0019] By adopting the above technical solution, tungsten carbide alloy has the characteristics of high hardness and high wear resistance, which helps to ensure that the wedge block is not easily worn during long-term use. The self-lubricating bearing guide sleeve can reduce the frictional resistance when the wedge block slides, thereby improving the smoothness of movement.

[0020] Preferably, the stiffness coefficient of the preload spring is set to a range of 80N / mm-120N / mm, and the outer diameter of the retractable pin is less than two-thirds of the width of the wedge block contact surface.

[0021] By adopting the above technical solution, the height coefficient of the preload spring can provide a stable preload force within this range. When the wedge block contacts the inner hole of the grinding wheel, the telescopic pin automatically extends and retracts with the change of the wedge block contact pressure to maintain a constant clamping force. It can adapt to grinding wheels of different thicknesses and is conducive to ensuring the stability of clamping.

[0022] Preferably, the inner wall of the flange wrench assembly is provided with elastic claws, which are pre-tightened in the hexagonal groove of the grinding wheel flange by a butterfly spring.

[0023] By adopting the above technical solution, the elastic gripper is pre-tightened in the hexagonal groove of the grinding wheel flange by the butterfly spring. The butterfly spring provides a stable pre-tightening force, which helps to ensure that the elastic gripper can firmly clamp the grinding wheel flange.

[0024] Preferably, the end of the elastic gripper is provided with a buffer pad, and the surface of the buffer pad is provided with an anti-slip wavy groove.

[0025] By adopting the above technical solution, the buffer gasket has a buffering effect. The anti-slip wavy groove on the surface of the buffer gasket helps to increase the friction with the grinding wheel flange, thereby further improving the clamping stability.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a spindle wrench assembly, a flange wrench assembly, and a linkage connection mechanism, the operator can efficiently drive the flange wrench assembly when operating the spindle wrench assembly, realizing the rapid disassembly and assembly of the grinding wheel. This helps to avoid various drawbacks caused by uneven installation force in traditional methods, reduces damage to the grinding machine spindle, and improves disassembly and assembly efficiency.

[0027] 2. By setting up a planetary gear set and a three-way synchronous locking structure, the transmission of the planetary gear set can transmit the rotation of the spindle wrench assembly to the flange wrench assembly, realizing the opposite synchronous rotation of the two. At the same time, the planetary gear set drives the three wedge blocks to move synchronously to clamp the inner hole of the grinding wheel, which helps to improve the clamping stability.

[0028] 3. By setting a preload spring and a retractable ejector pin, the preload spring provides a stable preload force. When the wedge block clamps the inner hole of the grinding wheel, the retractable ejector pin automatically extends and retracts with the change of contact pressure of the wedge block to maintain a constant clamping force, thus making it suitable for grinding wheels of different thicknesses and improving applicability. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the grinding wheel assembly and disassembly fixture in the embodiments of this application when it is operated on the grinding machine.

[0030] Figure 2 This is a schematic diagram of the structure of the grinding wheel assembly and disassembly tool in the embodiments of this application.

[0031] Explanation of reference numerals in the attached figures: 1. Spindle wrench assembly; 11. Ratchet handle; 12. Two-way anti-loosening ratchet device; 2. Flange wrench assembly; 3. Linkage connection mechanism. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0033] This application discloses a grinding wheel disassembly and assembly fixture for a grinding machine, referring to... Figure 1 and Figure 2 The system includes a spindle wrench assembly 1, a flange wrench assembly 2, and a linkage mechanism 3. The spindle wrench assembly 1 is mounted on the end face of the grinding machine spindle and threadedly connected to the spindle. The flange wrench assembly 2 is fitted onto the outer circumferential surface of the grinding wheel flange and threadedly connected to the flange. The linkage mechanism 3 drives the spindle wrench assembly 1 and the flange wrench assembly 2 together, so that when the spindle wrench assembly 1 rotates, it drives the flange wrench assembly 2 to rotate synchronously in the opposite direction. This structural design allows the flange wrench assembly 2 to be driven efficiently when the spindle wrench assembly 1 is operated, enabling rapid disassembly and assembly of the grinding wheel. This avoids various drawbacks caused by uneven installation force in traditional methods, such as reducing damage to the grinding machine spindle and improving disassembly and assembly efficiency.

[0034] Reference Figure 1 and Figure 2 The main shaft wrench assembly 1 includes a ratchet handle 11 and a two-way anti-loosening ratchet device 12. In this embodiment, the ratchet handle 11 is made of a high-strength metal material, such as chromium vanadium alloy steel, which has good strength and toughness and can withstand large torque. Its shape is designed as a handle for easy gripping and operation, facilitating the operator's application of force. The two-way anti-loosening ratchet device 12 is located at the pivot of the ratchet handle 11. Specifically, the two-way anti-loosening ratchet device 12 includes a forward-engaging ratchet disc and a reverse safety button. In this embodiment, the forward-engaging ratchet disc is manufactured using powder metallurgy, possessing high precision and wear resistance. Its function is to lock the forward rotation torque. When the operator rotates the ratchet handle 11 forward, the forward-engaging ratchet disc ensures stable torque transmission, enabling the tightening or loosening of the main shaft nut. The reverse safety button is made of plastic and is ergonomically designed for easy pressing. Pressing the reverse safety button releases the reverse rotation lock, allowing for safe operation when reverse operation is required. In addition, the bidirectional anti-loosening ratchet device 12 also includes an overload protection clutch, which has a built-in shear pin. When the force on the spindle wrench assembly 1 exceeds a preset threshold, the shear pin breaks and triggers the reset mechanism. In this embodiment, the shear pin is made of a metal material that is easily broken but has moderate strength, such as aluminum alloy. When the force is too great, the shear pin breaks, which can prevent further damage to the equipment and play a protective role. The reset mechanism is a spring reset type, which can automatically return to the initial state after the shear pin breaks, which is convenient for subsequent operation. The spring reset type is a common structure for reset mechanisms and will not be described in detail here.

[0035] Reference Figure 1 and Figure 2 The spindle wrench assembly 1 has a positioning notch at its end. In this embodiment, the positioning notch is U-shaped and its size is adapted to the fixing screw of the grinding machine spindle cover. The positioning notch is engaged with the fixing screw of the grinding machine spindle cover, which can ensure the stability of the spindle wrench assembly 1 during operation and prevent it from shaking or shifting.

[0036] Reference Figure 1 and Figure 2 The flange wrench assembly 2 is fitted onto the outer circumference of the grinding wheel flange and connected to the flange threads. Specifically, the inner wall of the flange wrench assembly 2 is provided with elastic claws. In this embodiment, the elastic claws are made of spring steel, giving them good elasticity and toughness. The elastic claws are pre-tightened in the hexagonal groove of the grinding wheel flange by a disc spring. The disc spring provides a stable pre-tightening force, ensuring that the elastic claws can firmly clamp the grinding wheel flange. At the same time, a polyurethane buffer pad is provided at the end of the elastic claw. The polyurethane buffer pad has good cushioning performance and wear resistance, and its surface is provided with anti-slip wavy grooves, which can increase the friction with the grinding wheel flange and further improve the clamping stability. In addition, the outer edge of the flange wrench assembly 2 is provided with an annular positioning platform with anti-slip texture. The anti-slip texture can be straight, diagonal, or mesh, etc., and is not limited here. The annular positioning platform facilitates the operator's grip and operation, while the anti-slip texture prevents hand slippage and improves operational safety.

[0037] Reference Figure 1 and Figure 2 The linkage mechanism 3 includes a planetary gear set and a three-way synchronous locking mechanism. The planetary gear set connects the spindle wrench assembly 1 and the flange wrench assembly 2. In this embodiment, the planetary gear set consists of a sun gear, planet gears, and a ring gear. Each gear is made of high-strength alloy steel, which has high transmission efficiency and load-bearing capacity. Through the transmission of the planetary gear set, the rotation of the spindle wrench assembly 1 can be transmitted to the flange wrench assembly 2, and the two can rotate synchronously in opposite directions. The three-way synchronous locking mechanism includes three wedges evenly distributed in a ring. The wedges are radially slidably disposed on the inner wall of the flange wrench assembly 2. The planetary gear set drives the wedges to move synchronously to clamp the inner hole of the grinding wheel. It is worth mentioning that the wedges are made of tungsten carbide alloy with a bevel angle of 15°-25°. Tungsten carbide alloy has the characteristics of high hardness and high wear resistance, which can ensure that the wedges are not easily worn during long-term use. In addition, a self-lubricating bearing guide sleeve is provided between the wedge block and the flange wrench assembly 2. The self-lubricating bearing guide sleeve is made of self-lubricating materials such as polytetrafluoroethylene, which can reduce the frictional resistance when the wedge block slides and improve its smoothness of movement.

[0038] Reference Figure 1 and Figure 2Each wedge block is equipped with two sets of preload springs and a retractable ejector pin behind it. The end of the retractable ejector pin contacts the wedge block. The preload spring limits the position of the retractable ejector pin by adjusting bolts. The preload spring stiffness coefficient is 80N / mm to 120N / mm, and the outer diameter of the retractable ejector pin is less than two-thirds of the width of the wedge block contact surface. In this embodiment, a helical spring is used for the preload spring, which can provide a stable preload force. When the wedge block contacts the inner hole of the grinding wheel, the retractable ejector pin automatically extends and retracts with the change of contact pressure of the wedge block to maintain a constant clamping force. This can adapt to grinding wheels of different thicknesses and ensure clamping stability.

[0039] The implementation principle of the grinding wheel disassembly and assembly fixture for a grinding machine according to this application embodiment is as follows: Through the coordinated operation of the spindle wrench assembly 1, the flange wrench assembly 2, and the linkage connection mechanism 3, efficient disassembly and assembly of the grinding wheel is achieved. The bidirectional anti-loosening ratchet device 12 and the overload protection clutch of the spindle wrench assembly 1 improve the safety and reliability of operation, avoiding damage to the equipment caused by improper operation or excessive force. The planetary gear set and the three-way synchronous locking mechanism in the linkage connection mechanism 3 enable the spindle wrench assembly 1 and the flange wrench assembly 2 to rotate synchronously in opposite directions, while the wedge block of the three-way synchronous locking mechanism can evenly clamp the inner hole of the grinding wheel. The spring-pin type thickness compensation system composed of a preload spring and a retractable ejector pin can adapt to grinding wheels of different thicknesses and maintain a constant clamping force. The design of elastic jaws and anti-slip texture further improves the stability and safety of the fixture. Compared with traditional grinding wheel disassembly and assembly methods, this fixture greatly reduces the damage frequency of the grinding machine spindle bearings, shortens the time for employees to replace grinding wheels, and improves production efficiency and equipment uptime.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tooling for disassembling and assembling grinding wheels in a grinding machine, characterized in that, The device includes a spindle wrench assembly (1), a flange wrench assembly (2), and a linkage connection mechanism (3). The spindle wrench assembly (1) is disposed on the end face of the grinding machine spindle and threadedly connected to the grinding machine spindle. The flange wrench assembly (2) is sleeved on the outer circumferential surface of the grinding wheel flange and threadedly connected to the flange. The linkage connection mechanism (3) drives the spindle wrench assembly (1) and the flange wrench assembly (2) to rotate synchronously in opposite directions when the spindle wrench assembly (1) rotates.

2. The grinding wheel assembly / disassembly fixture for a grinding machine according to claim 1, characterized in that: The linkage connection mechanism (3) includes a planetary gear set and a three-way synchronous locking structure. The planetary gear set is connected between the spindle wrench assembly (1) and the flange wrench assembly (2). The three-way synchronous locking structure includes three wedge blocks evenly distributed in a ring. The wedge blocks are slidably disposed on the inner side wall of the flange wrench assembly (2) in a radial direction. The planetary gear set drives the wedge blocks to move synchronously to clamp the inner hole of the grinding wheel.

3. The grinding wheel disassembly and assembly fixture for a grinding machine according to claim 2, characterized in that: Each wedge block is provided with two sets of preload springs and retractable ejector pins at its rear. The ends of the ejector pins contact the wedge blocks. The preload springs limit the position of the retractable ejector pins by adjusting bolts. The retractable ejector pins automatically extend and retract according to the contact pressure of the wedge blocks to maintain a constant clamping force.

4. The grinding wheel assembly / disassembly fixture for a grinding machine according to claim 1, characterized in that: The main shaft wrench assembly (1) includes a ratchet handle (11) and a two-way anti-loosening ratchet device (12). The two-way anti-loosening ratchet device (12) is located at the pivot of the ratchet handle (11). The two-way anti-loosening ratchet device (12) includes a forward-rotating engagement ratchet disc and a reverse-rotating safety button. The forward-rotating engagement ratchet disc locks the forward rotation torque, and the reverse-rotating safety button releases the reverse rotation lock when pressed.

5. The grinding wheel assembly / disassembly fixture for a grinding machine according to claim 4, characterized in that: The bidirectional anti-loosening ratchet device (12) also includes an overload protection clutch. The overload protection clutch has a built-in shear pin. When the spindle wrench assembly (1) is subjected to a force exceeding a preset threshold, the shear pin breaks and triggers a reset mechanism.

6. The grinding wheel assembly / disassembly fixture for a grinding machine according to claim 1, characterized in that: The spindle wrench assembly (1) has a positioning notch at its end, which is engaged with the fixing screw of the grinding machine spindle cover. The flange wrench assembly (2) has an annular positioning platform with anti-slip texture on its outer edge.

7. The grinding wheel assembly / disassembly fixture for a grinding machine according to claim 2, characterized in that: The wedge block is made of tungsten carbide alloy with a bevel angle ranging from 15° to 25°, and a self-lubricating bearing guide sleeve is provided between the wedge block and the flange wrench assembly (2).

8. The grinding wheel disassembly and assembly fixture for a grinding machine according to claim 3, characterized in that: The stiffness coefficient of the preloaded spring is set to a range of 80N / mm-120N / mm, and the outer diameter of the retractable ejector pin is less than two-thirds of the width of the wedge block contact surface.

9. The grinding wheel assembly / disassembly fixture for a grinding machine according to claim 1, characterized in that: The flange wrench assembly (2) has an elastic gripper on its inner wall, which is pre-tightened in the hexagonal groove of the grinding wheel flange by a butterfly spring.

10. A grinding wheel disassembly and assembly fixture for a grinding machine according to claim 9, characterized in that: The elastic gripper is provided with a buffer pad at its end, and the surface of the buffer pad is provided with anti-slip wavy grooves.

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