Synchronous pulley overload protection coupler for machine tool

Abstract

The utility model discloses a synchronous pulley overload protection coupler for a machine tool, overload protection is realized through a linkage assembly, and as steel balls are non-uniformly arranged on the circumference of a retainer and only one position on the circumference can be meshed with a groove in an output shell, when the tension applied to a belt pulley is too large, the steel balls are separated from the groove, and the belt pulley is prevented from being damaged. When the tensile force applied to the belt pulley is reduced, the steel ball rolls into the groove of the output shell after rotating for a circle along with the retainer, and is finally connected with the output shell and the power is continuously transmitted down along with the reduction of the overload torque to an allowable torque, so that the accurate control of the reset connection of the steel ball is realized, and the maintenance-free and after-sales-free functions can be realized.

Description

Technical Field

[0001] This utility model belongs to the field of machine tool mechanical transmission technology, specifically relating to a synchronous pulley overload protection coupling for machine tools. Background Technology

[0002] Currently, existing couplings mainly serve to connect two transmission systems, and their function is generally quite simple. In actual transmission systems, due to the influence of other factors, overload situations often occur during power transmission. In order to prevent damage to the transmission system due to overload, a disconnection component is usually required in the middle of the transmission system. Existing overload protection couplings can only disconnect the power, but cannot accurately control the overload torque at the time of disconnection. Furthermore, they cannot automatically reconnect after power disconnection, requiring professional maintenance.

[0003] Therefore, developing a new type of synchronous pulley overload protection coupling for machine tools has great market potential. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of the prior art and provide an overload protection coupling for synchronous pulleys in machine tools.

[0005] To solve the technical problem, the technical solution of this utility model is: an overload protection coupling for a synchronous belt pulley in a machine tool, comprising an adjusting ring, a leaf spring, an input housing, an output housing, a bearing, a pressure plate, and a linkage assembly. The outer wall of the input housing is sequentially fitted with the bearing, output housing, linkage assembly, pressure plate, leaf spring, and adjusting ring from left to right. The bearing is fitted and confined between the input housing and the output housing. The output housing has multiple grooves on the side near the linkage assembly. The linkage assembly consists of multiple steel balls arranged unevenly on the circumference of the retainer. The multiple grooves are matched to the positions of the multiple steel balls. The adjusting ring is threaded onto the input housing. The adjusting ring compresses the leaf spring, thereby pressing the pressure plate to engage the steel balls of the linkage assembly with the grooves of the output housing.

[0006] Preferably, the input housing is connected to the power input end via a clamping hub, and the output housing is connected to the pulley via bolts.

[0007] Preferably, the outer ring of the bearing is fitted and abuts against the inner wall step of the output housing, and the inner ring of the bearing is axially limited at the outer wall of the input housing.

[0008] Preferably, the adjusting ring has a screw hole in the radial direction, and the fixing screw passes through the screw hole to fix the adjusting ring to the input housing.

[0009] Preferably, the pressure plate has a leaf spring groove on the side near the leaf spring, and the leaf spring is confined within the leaf spring groove.

[0010] Preferably, the distance between the pressure plate and the adjusting ring is the compression adjustment range of the leaf spring, and the compression adjustment range of the leaf spring is proportional to the pressure value and the overload torque.

[0011] Compared with the prior art, the advantages of this utility model are:

[0012] (1) This utility model discloses a synchronous pulley overload protection coupling for machine tools. Overload protection is achieved through linkage components. Since the steel balls are unevenly arranged on the circumference of the retainer, there is only one position on the circumference that can mesh with the groove in the output housing. When the pulley is subjected to excessive tension, the steel balls are dislodged from the groove. When the pulley is subjected to reduced tension, the steel balls will roll back into the groove in the output housing after each rotation of the retainer. As the overload torque decreases to the allowable torque, the connection is finally established, and the power continues to be transmitted. This achieves precise control of the steel ball reset connection and enables maintenance-free and after-sales-free operation.

[0013] (2) This utility model adjusts the compression of the leaf spring to press the pressure plate so that the steel ball of the linkage component meshes with the groove of the output housing. The compression adjustment range of the leaf spring is proportional to the pressure value and the overload torque. Therefore, the overload torque can be adjusted by adjusting the compression of the leaf spring, so as to achieve precise control of the overload torque.

[0014] (3) The overload torque adjustment method of this utility model is simple. It only requires using a hook wrench to rotate the adjusting ring to adjust the compression adjustment range of the leaf spring. Clockwise is compression, which increases the overload torque; counterclockwise is release, which decreases the overload torque.

[0015] (4) This utility model has a compact structure, small installation space, bearing auxiliary support, radial load strengthening, convenient installation, and easy replacement even if damaged. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a synchronous belt pulley overload protection coupling for machine tools according to the present invention;

[0017] Figure 2 This is a schematic diagram of the linkage component of this utility model;

[0018] Figure 3 This is a schematic diagram of the reset connection principle of the coupling of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Adjusting ring, 2. Leaf spring, 3. Input housing, 4. Steel ball, 5. Output housing, 6. Bearing, 7. Clamping hub, 8. Fixing screw, 9. Pressure plate, 10. Retainer;

[0021] 1-1, Screw holes;

[0022] 5-1, Groove;

[0023] 9-1. Leaf spring groove. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to these embodiments. The present invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention. To provide the public with a thorough understanding of the present invention, specific details are described in detail in the following embodiments, but those skilled in the art will fully understand the present invention even without these details.

[0025] Example 1

[0026] like Figure 1 , 2 As shown, this utility model discloses an overload protection coupling for a synchronous pulley in a machine tool, including an adjusting ring 1, a leaf spring 2, an input housing 3, an output housing 5, a bearing 6, a pressure plate 9, and a linkage assembly. The outer wall of the input housing 3 is fitted with the bearing 6, the output housing 5, the linkage assembly, the pressure plate 9, the leaf spring 2, and the adjusting ring 1 from left to right. The bearing 6 is fitted and confined between the input housing 3 and the output housing 5. The output housing 5 has multiple grooves 5-1 near the linkage assembly. The linkage assembly consists of multiple steel balls 4 and a retainer 10. The multiple steel balls 4 are unevenly arranged on the circumference of the retainer 10. The multiple grooves 5-1 are matched with the positions of the multiple steel balls 4. The adjusting ring 1 is threaded onto the input housing 3. The adjusting ring 1 compresses the leaf spring 2 to press the pressure plate 9 so that the steel balls 4 of the linkage assembly engage with the grooves 5-1 of the output housing 5.

[0027] The steel balls 4 are unevenly arranged on the circumference of the retainer 10, and there is only one position on the circumference that can engage with the groove 5-1 in the output housing 5, so as to achieve precise position control.

[0028] Example 2

[0029] Preferred, such as Figure 1 As shown, the input housing 3 is connected to the power input end via a clamping hub 7, and the output housing 5 is connected to the pulley via bolts.

[0030] Preferred, such as Figure 1 As shown, the outer ring of the bearing 6 is fitted and abuts against the inner wall step of the output housing 5, and the inner ring of the bearing 6 is axially limited at the outer wall of the input housing 3.

[0031] Example 3

[0032] Preferred, such as Figure 1As shown, the adjusting ring 1 has a screw hole 1-1 in the radial direction, and the fixing screw 8 passes through the screw hole 1-1 to fix the adjusting ring 1 to the input housing 3.

[0033] The input housing 3 is provided with external threads, and the adjusting ring 1 is threadedly connected to the input housing 3.

[0034] Preferred, such as Figure 1 As shown, the pressure plate 9 is provided with a leaf spring groove 9-1 on the side near the leaf spring 2, and the leaf spring 2 is confined within the leaf spring groove 9-1.

[0035] Preferred, such as Figure 1 As shown, the distance between the pressure plate 9 and the adjusting ring 1 is the compression adjustment range of the leaf spring 2, and the compression adjustment range of the leaf spring 2 is proportional to the pressure value and the overload torque.

[0036] The displacement (compression adjustment range) of the leaf spring 2 is proportional to the pressure value. By precisely corresponding the pressure value with the magnitude of the overload torque, the overload torque can be precisely controlled, and this value is fixed by the fixing screw 8.

[0037] The adjusting ring 1 adjusts the compression range of the leaf spring 2 through the external thread of the input housing 3. After the leaf spring 2 is subjected to force, it transmits the pressure to the pressure plate 9. The pressure plate 9 squeezes the steel ball 4 into the groove 5-1 of the output housing 5 for power transmission. When the pulley is subjected to excessive tension at the load end, it will transmit the power to the output housing 5. The steel ball 4 in the groove 5-1 of the output housing 5 will roll out of the groove, causing the power to be disconnected, thus achieving the effect of protecting the power source.

[0038] The leaf spring 2 has characteristics such as high torque, high rigidity and fatigue resistance.

[0039] The working principle of this utility model is as follows:

[0040] like Figure 1 , 2As shown, this utility model discloses an overload protection coupling for a synchronous belt pulley in a machine tool. This machine tool is used for transmission reversal. The overload protection coupling includes an adjusting ring 1, a leaf spring 2, an input housing 3, an output housing 5, a bearing 6, a pressure plate 9, and a linkage assembly. Power is input to the input housing 3 of the coupling through a clamping hub 7. The input housing 3 contains a ring of steel balls 4, and the output housing 5 has a ring of corresponding grooves 5-1 of matching size. Simultaneously, power is input to the output housing 5 through the connection between the steel balls 4 and the grooves 5-1. The output housing 5 is connected to the pulley by bolts to transmit power. The adjusting ring 1 of this utility model... The compression of the leaf spring 2 is adjusted by the external thread of the input housing 3. After the leaf spring 2 is under force, it transmits the pressure to the pressure plate 9. The pressure plate 9 squeezes the steel ball 4 into the groove 5-1 of the output housing 5 for power transmission. When the pulley is subjected to excessive tension at the load end, it will transmit power to the output housing 5. The steel ball 4 in the groove 5-1 of the output housing 5 will roll out of the groove 5-1, causing the power to be disconnected, thus protecting the power source. When the tension on the pulley decreases, the steel ball 4 will roll back into the groove 5-1 of the output housing 5 after the retainer 10 rotates one revolution, and the power will continue to be transmitted, thus achieving maintenance-free and after-sales-free functions.

[0041] With each rotation of the retainer 10, the steel ball 4 can only be reset to one position. This process repeats until the overload torque decreases to a suitable torque, at which point the connection is finally established.

[0042] like Figure 3 The diagram shown illustrates the reset connection principle of the coupling of this utility model. This utility model is based on the use of a leaf spring 2 with decreasing performance. The overload torque includes a minimum value and a maximum value. Once the overload torque reaches the arc peak of the overload torque and exceeds the maximum value, the coupling will automatically loosen and the torque transmission will be interrupted. When the overload torque drops below the maximum allowable torque value, the coupling will attempt to automatically reset the connection. The maximum and minimum values ​​are the adjustment range. The steel ball 4 rolls into the groove 5-1 of the output housing 5 along with the retainer 10, restoring the normal transmission torque.

[0043] The method for adjusting overload torque according to this utility model is as follows:

[0044] Step 1: Loosen radial fixing screw 8.

[0045] Step 2: Use a hook wrench to rotate the adjusting ring 1 to adjust the compression range of the leaf spring 2. Clockwise rotation compresses the spring, increasing the overload torque; counterclockwise rotation releases the spring, decreasing the overload torque.

[0046] Step 3: After adjusting ring 1 to the correct position, tighten radial fixing screw 8 with a wrench;

[0047] Step 4: Use a torque tester to test the set overload torque (disconnect torque).

[0048] This utility model discloses an overload protection coupling for a synchronous pulley in machine tools. Overload protection is achieved through a linkage component. Because the steel balls are unevenly arranged on the circumference of the retainer, there is only one position on the circumference that can engage with the groove in the output housing. When the pulley is subjected to excessive tension, the steel balls disengage from the groove. When the pulley is subjected to reduced tension, the steel balls roll back into the groove in the output housing after each rotation of the retainer, and the power continues to be transmitted. This achieves precise control of the steel ball reset connection and enables maintenance-free and after-sales service-free operation.

[0049] This invention adjusts the compression of the leaf spring to press the pressure plate, thereby engaging the steel ball of the linkage component with the groove of the output housing. The compression adjustment range of the leaf spring is proportional to the pressure value and the overload torque. Therefore, the overload torque can be adjusted by adjusting the compression of the leaf spring, thus achieving precise control of the overload torque.

[0050] The overload torque adjustment method of this utility model is simple. It only requires using a hook wrench to rotate the adjusting ring to adjust the compression adjustment range of the leaf spring. Clockwise is compression, which increases the overload torque; counterclockwise is release, which decreases the overload torque.

[0051] This utility model has a compact structure, requires little installation space, has bearing auxiliary support, strengthens radial load bearing, is easy to install, and is easy to replace even if damaged.

[0052] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0053] Many other changes and modifications can be made without departing from the concept and scope of this utility model. It should be understood that this utility model is not limited to the specific embodiments, and the scope of this utility model is defined by the appended claims.

Claims

1. A synchronous belt pulley overload protection coupling for machine tools, characterized in that: The assembly includes an adjusting ring (1), a leaf spring (2), an input housing (3), an output housing (5), a bearing (6), a pressure plate (9), and a linkage assembly. The outer wall of the input housing (3) is fitted with the bearing (6), the output housing (5), the linkage assembly, the pressure plate (9), the leaf spring (2), and the adjusting ring (1) from left to right. The bearing (6) is fitted and confined between the input housing (3) and the output housing (5). The output housing (5) has multiple grooves (5-1) on the side near the linkage assembly. The linkage assembly consists of steel balls (4) and a retainer (10). There are multiple steel balls (4), which are unevenly arranged on the circumference of the retainer (10). The multiple grooves (5-1) are matched with the positions of the multiple steel balls (4). The adjusting ring (1) is threaded onto the input housing (3). The adjusting ring (1) compresses the leaf spring (2) to press the pressure plate (9) so that the steel balls (4) of the linkage assembly engage with the grooves (5-1) of the output housing (5).

2. The overload protection coupling for a synchronous pulley in a machine tool according to claim 1, characterized in that: The input housing (3) is connected to the power input end via a clamping hub (7), and the output housing (5) is connected to the pulley via bolts, with the pulley connected to the load end.

3. The overload protection coupling for a synchronous pulley in a machine tool according to claim 1, characterized in that: The outer ring of the bearing (6) is fitted and abuts against the inner wall step of the output housing (5), and the inner ring of the bearing (6) is axially limited at the outer wall of the input housing (3).

4. The overload protection coupling for a synchronous pulley in a machine tool according to claim 1, characterized in that: The adjusting ring (1) has a screw hole (1-1) in the radial direction. The fixing screw (8) passes through the screw hole (1-1) to fix the adjusting ring (1) on the input housing (3).

5. The overload protection coupling for a synchronous pulley in a machine tool according to claim 1, characterized in that: The pressure plate (9) is provided with a leaf spring groove (9-1) on the side near the leaf spring (2), and the leaf spring (2) is confined within the leaf spring groove (9-1).

6. The overload protection coupling for a synchronous pulley in a machine tool according to claim 5, characterized in that: The distance between the pressure plate (9) and the adjusting ring (1) is the compression adjustment range of the leaf spring (2), and the compression adjustment range of the leaf spring (2) is proportional to the pressure value and the overload torque.

Images