Belt pulley for transmission of mechanical equipment

Abstract

The utility model discloses a belt pulley for transmission of mechanical equipment, which comprises a belt pulley body, the outer surface of the belt pulley body is provided with a pulley chute, the belt pulley body is internally provided with a first inner hole and an inner bushing, and the outer surface of the inner bushing is in conical surface fit with the first inner hole. An edge protrusion is arranged at the large-outer-diameter end of the inner bushing, a pressing plate is arranged on the side, away from the belt pulley body, of the edge protrusion, and a plurality of bolts are evenly arranged on the circumference of the pressing plate. The tool manufacturing cost in the production process is greatly reduced, the workload of an operator is greatly reduced in the test run process, positive effects are generated on continuity, high efficiency and cost saving in the production process, and a crucial role is played on stability in the test run process.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical rolling and relates to a belt pulley for transmission of mechanical equipment. Background Art

[0002] In the metallurgical industry, mechanical equipment requires necessary commissioning after installation. During the commissioning process, pulleys are used to transmit a certain torque to achieve rotation of the various components within the equipment. Usually, there is a transition fit between the pulley and the drive shaft, and a certain tolerance fit between the pulley and the shaft is required to achieve better transmission. The pulley is fixed by a key pin and a keyway. In actual production, a small clearance fit is usually used. When the gap between the pulley and the machine shaft does not meet the tolerance, the transition fit pulley is difficult to install and remove. Due to the existence of this gap, the pulley vibrates greatly during operation, resulting in unstable transmission and loud noise. In addition, since the outer diameters of the drive shafts of different equipment vary, many types of pulleys are required for commissioning operations, which increases the production cost. Utility Model Content

[0003] The utility model aims to provide a belt pulley for transmission of mechanical equipment, which has the characteristics of stable transmission and multi-purpose.

[0004] The technical solution adopted by the utility model is a pulley for mechanical equipment transmission, comprising a pulley body, a pulley groove being provided on the outer surface of the pulley body, a first inner hole being opened inside the pulley body, an inner sleeve being further provided inside the pulley body, the outer surface of the inner sleeve being conically matched with the first inner hole, an edge protrusion being provided on one end of the inner sleeve having a larger outer diameter, a pressure plate being provided on the side of the edge protrusion away from the pulley body, and a plurality of bolts being evenly provided around the circumference of the pressure plate.

[0005] The utility model is also characterized in that:

[0006] A second inner hole is provided inside the inner sleeve.

[0007] A third inner hole is provided inside the pressing plate.

[0008] The matching angle between the outer surface of the inner sleeve and the conical surface of the first inner hole is 10°-20°.

[0009] A plurality of internal threaded through holes are opened corresponding to the edge protrusion and the circumference of the pressure plate, threaded holes are opened corresponding to the pulley body and the bolts, and the pulley body, the inner sleeve and the pressure plate are fastened by a plurality of bolts.

[0010] Several first U-shaped grooves are evenly opened on the top of the inner sleeve, and several first U-shaped grooves are located between adjacent bolts. Several second U-shaped grooves are evenly opened on the bottom of the inner sleeve, and several second U-shaped grooves are staggered with the first U-shaped grooves. The depth of the first U-shaped groove and the second U-shaped groove is 1 / 2-3 / 4 of the total length of the inner sleeve.

[0011] Elastic washers are arranged between the bolts and the pressure plate.

[0012] The surface hardness of the inner sleeve is higher than the hardness of the pulley body.

[0013] Leave a 3-5mm gap between the edge protrusion and the pulley body.

[0014] The number of bolts is four.

[0015] The beneficial effects of the utility model are:

[0016] The pulley for mechanical equipment transmission of the present invention adopts an inner sleeve of the pulley to achieve multiple uses. The pulley is made of one piece, but the pulley can be equipped with inner sleeves with different specifications of inner holes. To achieve different equipment transmission shafts, it is only necessary to replace the inner hole size of the inner sleeve of this set of pulley to meet the use requirements. In addition, the outer conical surface of the inner sleeve and the inner conical surface of the pulley adopt a conical surface matching relationship. After the pulley is installed on the transmission shaft, the matching length of the conical surface can be adjusted to achieve a full fit between the inner hole of the inner sleeve and the outer circle of the transmission shaft, thereby ensuring the smoothness and efficiency of the transmission. In summary, the pulley for mechanical equipment transmission of the present invention greatly reduces the tooling manufacturing cost in the production process, and also greatly reduces the workload of the operator during the trial run. It has a positive effect on the continuity, efficiency and cost savings of the production process, and plays a vital role in the smoothness of the trial run. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a pulley used for transmission of mechanical equipment in the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the pulley body in the pulley used for transmission of mechanical equipment of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the inner sleeve in the pulley used for transmission of mechanical equipment of the utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the inner sleeve in the pulley used for transmission of mechanical equipment in this utility model.

[0021] Figure 5 This is a schematic diagram of the structure of the intermediate pressure plate of the pulley used for transmission of mechanical equipment of the utility model;

[0022] Among them, 1. Pulley body; 1-1. Wheel slide groove; 1-2. First inner hole; 1-3. Threaded hole; 2. Inner sleeve; 2-1. Edge protrusion; 2-2. Second inner hole; 2-3. First U-shaped groove; 2-4. Second U-shaped groove; 3. Pressure plate; 3-1. Third inner hole; 4-1. Bolt; 4-2. Elastic washer. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] like Figure 1 As shown, a pulley for mechanical equipment transmission includes a pulley body 1, and a wheel sliding groove 1-1 is provided on the outer surface of the pulley body 1. The main function of the pulley body 1 is to transmit torque by installing a belt in the sliding groove during the test run. Therefore, the groove width, bevel angle, groove depth, etc. of the wheel sliding groove 1-1 need to be designed and manufactured according to the standard size of the relevant belt.

[0025] like Figure 2 As shown, a first inner hole 1-2 is opened inside the pulley body 1, and an inner sleeve 2 is also provided inside the pulley body 1. The surface hardness of the inner sleeve 2 is higher than the hardness of the pulley body 1, and the outer surface of the inner sleeve 2 is conically matched with the first inner hole 1-2. The inner sleeve 2 has an edge protrusion 2-1 at one end with a larger outer diameter, and a 3-5mm gap is reserved between the edge protrusion 2-1 and the pulley body 1. A pressure plate 3 is provided on the side of the edge protrusion 2-1 away from the pulley body 1, and a plurality of bolts 4-1 are evenly arranged around the circumference of the pressure plate 3. The number of bolts 4-1 is four, and an elastic washer 4-2 is provided between the plurality of bolts 4-1 and the pressure plate 3.

[0026] like Figure 3 As shown, the inner sleeve 2 is provided with a second inner hole 2-2. The outer surface of the inner sleeve 2 and the tapered surface of the first inner hole 1-2 have a matching angle of 10°-20°. The machining dimension tolerance of the second inner hole 2-2 is required to be in accordance with the theoretical dimension +0.1 / +0.2mm. This dimension must ensure smooth assembly and can be squeezed by the pressure plate during installation to ensure that the inner hole of the pulley can fit seamlessly with the outer circle of the transmission shaft. After the outer bevel, inner hole and other dimensions of the inner sleeve are machined as a whole, the inner sleeve is bored in the axial direction by a boring machine, as shown in FIG. Figure 4As shown, a number of first U-shaped grooves 2-3 are evenly opened on the top of the inner sleeve 2, and a number of first U-shaped grooves 2-3 are located between adjacent bolts 4-1. A number of second U-shaped grooves 2-4 are evenly opened on the bottom of the inner sleeve 2, and a number of second U-shaped grooves 2-4 are staggered with the first U-shaped grooves 2-3. The depth of the first U-shaped groove 2-3 and the second U-shaped groove 2-4 is 1 / 2-3 / 4 of the total length of the inner sleeve 2. In this way, the inner diameter of the inner sleeve 2 can expand and contract within a certain range during use. After the overall processing is completed, nitriding treatment is performed. The main purpose is to ensure that the surface hardness of the inner sleeve 2 is higher than the hardness of the pulley body 1, so as to avoid grinding scratches during the pressing process, so as to ensure that the second inner hole 2-2 is fully fitted with the outer circle of the transmission shaft, and realize efficient and smooth transmission of power.

[0027] like Figure 5 As described above, a third inner hole 3-1 is provided inside the pressure plate 3. Several inner threaded through holes are provided on the edge protrusion 2-1 and the circumference of the pressure plate 3, and threaded holes 1-3 are provided on the pulley body 1 and the bolts 4-1, respectively. The pulley body 1, the inner sleeve 2 and the pressure plate 3 are fastened by several bolts 4-1. The main purpose of the pressure plate 3 is to achieve synchronous clamping by adjusting the fit of the conical surface between the inner sleeve 2 and the pulley body 1, and the fit of the outer circle between the second inner hole 2-2 and the transmission shaft. During the design, a gap is reserved between the edge protrusion 2-1 and the end face of the pulley body 1 to ensure that there is enough space for movement and that all fitting surfaces can be fully fitted. In addition, the use of elastic washers 4-2 increases the tightening strength of the bolts, strengthens the engagement effect, and ensures better engagement stability.

[0028] The working process of the belt pulley for mechanical equipment transmission of the utility model is as follows:

[0029] During operation, the first thing to do is to select a suitable inner sleeve according to the outer diameter of the drive shaft of the required test equipment. Since a pulley in this set of equipment will be equipped with several inner sleeves, the appropriate inner sleeve size must be selected before selection. The pulley body and the inner sleeve of the pulley for mechanical equipment transmission of the utility model are temporarily inserted into the outer diameter of the drive shaft of the relevant mechanical equipment and placed in a suitable use position. Then, the pressure plate is passed through the inner sleeve and fastened into the threaded hole on the pulley by bolting. The pressure plate is tightened by tightening the four bolts in sequence. During this process, it is important to pay attention to tightening the four bolts step by step to ensure that the mating surfaces are seamlessly fitted. Do not tighten a single bolt and then tighten the others. This will cause scratches on the mating surfaces and is not conducive to the transmission of torque. After ensuring that the inner hole of the inner sleeve and the outer circle of the drive shaft are seamlessly fitted, the test operation can be carried out. In this way, the problem of the poor fit between the original pulley inner hole and the outer circle of the drive shaft affecting the overall test product can be solved.

[0030] Example 1

[0031] like Figure 1 As shown, the belt pulley for mechanical equipment transmission includes a belt pulley body 1, and the outer surface of the belt pulley body 1 is provided with a wheel sliding groove 1-1, as shown in FIG. Figure 2 As shown, a first inner hole 1-2 is opened inside the pulley body 1, and an inner sleeve 2 is also provided inside the pulley body 1. The surface hardness of the inner sleeve 2 is higher than the hardness of the pulley body 1, and the outer surface of the inner sleeve 2 is conically matched with the first inner hole 1-2. The inner sleeve 2 has an edge protrusion 2-1 at one end with a larger outer diameter, and a 3mm gap is reserved between the edge protrusion 2-1 and the pulley body 1. A pressure plate 3 is provided on the side of the edge protrusion 2-1 away from the pulley body 1, and a number of bolts 4-1 are evenly arranged on the circumference of the pressure plate 3. The number of bolts 4-1 is four, and an elastic washer 4-2 is provided between the bolts 4-1 and the pressure plate 3.

[0032] Example 2

[0033] like Figure 1 As shown, the belt pulley for mechanical equipment transmission includes a belt pulley body 1, and the outer surface of the belt pulley body 1 is provided with a wheel sliding groove 1-1, as shown in FIG. Figure 2 As shown, a first inner hole 1-2 is opened inside the pulley body 1, and an inner sleeve 2 is also provided inside the pulley body 1. The surface hardness of the inner sleeve 2 is higher than the hardness of the pulley body 1, and the outer surface of the inner sleeve 2 is conically matched with the first inner hole 1-2. The inner sleeve 2 has an edge protrusion 2-1 at one end with a larger outer diameter, and a 3mm gap is reserved between the edge protrusion 2-1 and the pulley body 1. A pressure plate 3 is provided on the side of the edge protrusion 2-1 away from the pulley body 1, and a number of bolts 4-1 are evenly arranged on the circumference of the pressure plate 3. The number of bolts 4-1 is four, and an elastic washer 4-2 is provided between the bolts 4-1 and the pressure plate 3.

[0034] like Figure 3 As shown, a second inner hole 2-2 is opened inside the inner sleeve 2, and the tapered surface matching angle between the outer surface of the inner sleeve 2 and the first inner hole 1-2 is 10°. Figure 4 As shown, a number of first U-shaped grooves 2-3 are evenly opened on the top of the inner sleeve 2, and a number of first U-shaped grooves 2-3 are located between adjacent bolts 4-1. A number of second U-shaped grooves 2-4 are evenly opened on the bottom of the inner sleeve 2, and a number of second U-shaped grooves 2-4 are staggered with the first U-shaped grooves 2-3. The depth of the first U-shaped grooves 2-3 and the second U-shaped grooves 2-4 is 1 / 2 of the total length of the inner sleeve 2.

[0035] Example 3

[0036] like Figure 1 As shown, the belt pulley for mechanical equipment transmission includes a belt pulley body 1, and the outer surface of the belt pulley body 1 is provided with a wheel sliding groove 1-1, as shown in FIG. Figure 2As shown, a first inner hole 1-2 is opened inside the pulley body 1, and an inner sleeve 2 is also provided inside the pulley body 1. The surface hardness of the inner sleeve 2 is higher than the hardness of the pulley body 1, and the outer surface of the inner sleeve 2 is conically matched with the first inner hole 1-2. The inner sleeve 2 has an edge protrusion 2-1 at one end with a larger outer diameter, and a 5mm gap is reserved between the edge protrusion 2-1 and the pulley body 1. A pressure plate 3 is provided on the side of the edge protrusion 2-1 away from the pulley body 1, and a number of bolts 4-1 are evenly arranged on the circumference of the pressure plate 3. The number of bolts 4-1 is four, and an elastic washer 4-2 is provided between the bolts 4-1 and the pressure plate 3.

[0037] Example 4

[0038] like Figure 1 As shown, the belt pulley for mechanical equipment transmission includes a belt pulley body 1, and the outer surface of the belt pulley body 1 is provided with a wheel sliding groove 1-1, as shown in FIG. Figure 2 As shown, a first inner hole 1-2 is opened inside the pulley body 1, and an inner sleeve 2 is also provided inside the pulley body 1. The surface hardness of the inner sleeve 2 is higher than the hardness of the pulley body 1, and the outer surface of the inner sleeve 2 is conically matched with the first inner hole 1-2. The inner sleeve 2 has an edge protrusion 2-1 at one end with a larger outer diameter, and a 5mm gap is reserved between the edge protrusion 2-1 and the pulley body 1. A pressure plate 3 is provided on the side of the edge protrusion 2-1 away from the pulley body 1, and a number of bolts 4-1 are evenly arranged on the circumference of the pressure plate 3. The number of bolts 4-1 is four, and an elastic washer 4-2 is provided between the bolts 4-1 and the pressure plate 3.

[0039] like Figure 3 As shown, a second inner hole 2-2 is opened inside the inner sleeve 2, and the tapered surface matching angle between the outer surface of the inner sleeve 2 and the first inner hole 1-2 is 20°. Figure 4 As shown, a number of first U-shaped grooves 2-3 are evenly opened on the top of the inner sleeve 2, and a number of first U-shaped grooves 2-3 are located between adjacent bolts 4-1. A number of second U-shaped grooves 2-4 are evenly opened on the bottom of the inner sleeve 2, and a number of second U-shaped grooves 2-4 are staggered with the first U-shaped grooves 2-3. The depth of the first U-shaped grooves 2-3 and the second U-shaped grooves 2-4 is 3 / 4 of the total length of the inner sleeve 2.

[0040] Example 5

[0041] like Figure 1 As shown, the belt pulley for mechanical equipment transmission includes a belt pulley body 1, and the outer surface of the belt pulley body 1 is provided with a wheel sliding groove 1-1, as shown in FIG. Figure 2As shown, a first inner hole 1-2 is opened inside the pulley body 1, and an inner sleeve 2 is also provided inside the pulley body 1. The surface hardness of the inner sleeve 2 is higher than the hardness of the pulley body 1, and the outer surface of the inner sleeve 2 is conically matched with the first inner hole 1-2. The inner sleeve 2 has an edge protrusion 2-1 at one end with a larger outer diameter, and a 4mm gap is reserved between the edge protrusion 2-1 and the pulley body 1. A pressure plate 3 is provided on the side of the edge protrusion 2-1 away from the pulley body 1, and a number of bolts 4-1 are evenly arranged on the circumference of the pressure plate 3. The number of bolts 4-1 is four, and an elastic washer 4-2 is provided between the bolts 4-1 and the pressure plate 3.

[0042] Example 6

[0043] like Figure 1 As shown, the belt pulley for mechanical equipment transmission includes a belt pulley body 1, and the outer surface of the belt pulley body 1 is provided with a wheel sliding groove 1-1, as shown in FIG. Figure 2 As shown, a first inner hole 1-2 is opened inside the pulley body 1, and an inner sleeve 2 is also provided inside the pulley body 1. The surface hardness of the inner sleeve 2 is higher than the hardness of the pulley body 1, and the outer surface of the inner sleeve 2 is conically matched with the first inner hole 1-2. The inner sleeve 2 has an edge protrusion 2-1 at one end with a larger outer diameter, and a 4mm gap is reserved between the edge protrusion 2-1 and the pulley body 1. A pressure plate 3 is provided on the side of the edge protrusion 2-1 away from the pulley body 1, and a number of bolts 4-1 are evenly arranged on the circumference of the pressure plate 3. The number of bolts 4-1 is four, and an elastic washer 4-2 is provided between the bolts 4-1 and the pressure plate 3.

[0044] like Figure 3 As shown, a second inner hole 2-2 is opened inside the inner sleeve 2, and the tapered surface matching angle between the outer surface of the inner sleeve 2 and the first inner hole 1-2 is 15°. Figure 4 As shown, a number of first U-shaped grooves 2-3 are evenly opened on the top of the inner sleeve 2, and a number of first U-shaped grooves 2-3 are located between adjacent bolts 4-1. A number of second U-shaped grooves 2-4 are evenly opened on the bottom of the inner sleeve 2, and a number of second U-shaped grooves 2-4 are staggered with the first U-shaped grooves 2-3. The depth of the first U-shaped grooves 2-3 and the second U-shaped grooves 2-4 is 1 / 2 of the total length of the inner sleeve 2.

[0045] Example 7

[0046] Based on the mechanical equipment transmission pulley provided in any one of Examples 1-6, as Figure 5 As mentioned above, a third inner hole 3-1 is formed inside the pressure plate 3. A plurality of internal threaded through holes are formed on the edge protrusion 2-1 and the circumference of the pressure plate 3. Threaded holes 1-3 are formed on the pulley body 1 and the bolts 4-1. The pulley body 1, the inner sleeve 2 and the pressure plate 3 are fastened together by the plurality of bolts 4-1.

Claims

1. A pulley for mechanical equipment transmission, characterized in that: The invention comprises a pulley body (1), wherein the outer surface of the pulley body (1) is provided with a wheel slide groove (1-1), the interior of the pulley body (1) is provided with a first inner hole (1-2), the interior of the pulley body (1) is further provided with an inner sleeve (2), the outer surface of the inner sleeve (2) and the first inner hole (1-2) are conically matched, the end of the inner sleeve (2) with a larger outer diameter is provided with an edge protrusion (2-1), the side of the edge protrusion (2-1) away from the pulley body (1) is provided with a pressure plate (3), and the circumference of the pressure plate (3) is evenly provided with a plurality of bolts (4-1).

2. The mechanical equipment transmission pulley according to claim 1, characterized in that: A second inner hole (2-2) is provided inside the inner sleeve (2).

3. The mechanical equipment transmission pulley according to claim 1, characterized in that: A third inner hole (3-1) is provided inside the pressing plate (3).

4. The mechanical equipment transmission pulley according to claim 1, characterized in that: The tapered matching angle between the outer surface of the inner sleeve (2) and the first inner hole (1-2) is 10°-20°.

5. The mechanical equipment transmission pulley according to claim 1, characterized in that: The edge protrusion (2-1) and the pressure plate (3) are provided with a plurality of internal threaded through holes corresponding to the circumference thereof, the pulley body (1) and the bolts (4-1) are provided with threaded holes (1-3) corresponding to the circumference thereof, and the pulley body (1), the inner sleeve (2) and the pressure plate (3) are fastened by means of the plurality of bolts (4-1).

6. The mechanical equipment transmission pulley according to claim 1, characterized in that: A plurality of first U-shaped grooves (2-3) are evenly formed on the top of the inner sleeve (2), and the plurality of first U-shaped grooves (2-3) are located between adjacent bolts (4-1). A plurality of second U-shaped grooves (2-4) are evenly formed on the bottom of the inner sleeve (2), and the plurality of second U-shaped grooves (2-4) are staggered with the first U-shaped grooves (2-3). The depth of the first U-shaped grooves (2-3) and the second U-shaped grooves (2-4) is 1 / 2 to 3 / 4 of the total length of the inner sleeve (2).

7. The mechanical equipment transmission pulley according to claim 1, characterized in that: Elastic washers (4-2) are provided between the plurality of bolts (4-1) and the pressing plate (3).

8. The mechanical equipment transmission pulley according to claim 1, characterized in that: The surface hardness of the inner sleeve (2) is higher than the hardness of the pulley body (1).

9. The mechanical equipment transmission pulley according to claim 1, characterized in that: A gap of 3-5 mm is reserved between the edge protrusion (2-1) and the pulley body (1).

10. The mechanical equipment transmission pulley according to claim 1, characterized in that: The number of the bolts (4-1) is four.

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