Elastic belt installation tool

Abstract

The present invention discloses an elastic belt installation tool, comprising a front clamping block and a rear clamping block inserted into the front clamping block, the front clamping block having a first arc-shaped guide plate, a support vertical plate being provided at the front side of the first arc-shaped guide plate, an arc-shaped slot for inserting the rear clamping block being formed between the bottom surface of the first arc-shaped guide plate and the top surface of the support vertical plate, the rear clamping block having a second arc-shaped guide plate, a radially oriented connecting plate being provided at the front side of the second arc-shaped guide plate, a radially oriented arc-shaped baffle being provided at the rear side of the second arc-shaped guide plate, a threaded through hole being provided at the connecting plate, a positioning circular hole corresponding to the axial direction of the threaded through hole being provided on the support vertical plate, and an adjustment bolt being inserted into the positioning circular hole so that the rear clamping block can move axially relative to the front clamping block. The present invention adopts a split clamping structure of a front clamping block and a rear clamping block inserted into the front clamping block, has good versatility, the adjustment bolt can be used as a turning interface, and has high assembly efficiency.

Description

Technical Field

[0001] The invention relates to a belt installation tool, in particular to an elastic belt installation tool. Background Art

[0002] The front-end gear train system of the engine generally includes crankshaft pulleys, air conditioners, water pumps, belts and other accessories. Among them, the belt is responsible for effectively transmitting the power output by the engine crankshaft to the air conditioner and water pump. Since there are fewer driving accessories and the transmission torque is small, elastic belts are generally used to meet the use requirements of the front-end gear train system. In the working state, the elastic belt is stretched compared to the static state. This stretching deformation makes the belt produce a certain tension to ensure the stable operation of the front-end gear train system. Because the elastic belt does not require a tensioning system, it has the advantages of light weight, low cost and compact structure, and is increasingly used in engines. The elastic belt ensures the tension through its own elasticity. Therefore, when installing, the belt needs to be stretched by force before it can enter the pulley groove, so it is often difficult to assemble and must be installed with the help of installation tools. The disadvantage of the existing elastic belt auxiliary installation tool is that there is a certain violent operation process when the elastic belt is forcibly stretched and falls into the pulley wedge groove. This method is generally used when the belt tension requirement is small, such as a three-ribbed belt or a V-belt. For the installation of elastic belts with 5 ribs or higher tension, the current belt auxiliary installation mechanism is very easy to cause damage to the belt wedge surface when used. At the same time, when the elastic belt of the prior art is initially installed, there is a problem that the elastic belt is separated from the installation tool. Therefore, during the initial installation, the elastic belt and the auxiliary installation mechanism need to be tightened manually, and the assembly efficiency is low. Summary of the invention

[0003] The technical problem to be solved by the invention is to provide an elastic belt installation tool with good versatility and high assembly efficiency.

[0004] To solve the above technical problems, the present invention includes an arc-shaped front clamping block and a rear clamping block inserted into the front clamping block, the front clamping block having a first arc-shaped guide plate, a support vertical plate being provided on the front side of the first arc-shaped guide plate, an arc-shaped slot for inserting the rear clamping block being formed between the bottom surface of the first arc-shaped guide plate and the top surface of the support vertical plate, the arc-shaped slot being arranged along the circumferential direction of the first arc-shaped guide plate; the rear clamping block having a second arc-shaped guide plate, a radially-oriented connecting plate being provided on the front side of the second arc-shaped guide plate, an arc-shaped baffle being provided on the rear side of the second arc-shaped guide plate, the axial width of the second arc-shaped guide plate being greater than the axial width of the first arc-shaped guide plate; a threaded through hole being provided on the connecting plate, a positioning circular hole corresponding to the axial direction of the threaded through hole being provided on the support vertical plate, the positioning circular hole being a blind hole, and the threaded through hole being provided with an adjustment bolt inserted into the positioning circular hole so that the rear clamping block can move axially relative to the front clamping block.

[0005] A movable vertical plate is provided on the rear side of the supporting vertical plate in correspondence thereto, a through hole is provided on the supporting vertical plate, the through hole is located at one end of the circumferential opening direction of the arc-shaped slot, a positioning pin is provided at approximately the middle position of the rear side of the supporting vertical plate, a positioning pin hole corresponding to the positioning pin and a threaded hole corresponding to the through hole are provided on the movable vertical plate, and a locking bolt threaded in the threaded hole is provided in the through hole.

[0006] A gasket is sleeved on the locking bolt between the supporting vertical plate and the movable vertical plate.

[0007] The movable vertical plate has an arc-shaped top surface adapted to the inner peripheral surface of the first arc-shaped guide plate.

[0008] The first arc guide plate gradually widens from the end of the arc slot in the circumferential opening direction along the extending direction of the arc slot, and an arc guide surface and a straight guide surface are formed on the rear side end surface of the first arc guide plate.

[0009] After adopting the above structure, since the present invention has a split clamping structure of a front clamping block and a rear clamping block inserted into the front clamping block, the arc-shaped guide plate constituting the clamping block forms a belt guide groove, and the axial position of the front and rear clamping blocks is adjustable, and different belt entry positions can be achieved without the aid of other supports, and the installation tool has good versatility. The adjustment bolt can be used as a turning interface, and the same bolt is used for clamping and fixing the installation tool and turning. The turning does not require switching sleeves, and the turning direction is consistent with the tightening direction of the bolt. In this way, a clamping force is still generated between the installation tool and the pulley during turning, without the risk of loosening, and the assembly efficiency is high. At the same time, the turning interface is close to the edge of the pulley, the force arm is long, and the turning is relatively labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings:

[0011] Figure 1 It is a structural schematic diagram of the present invention;

[0012] Figure 2 It is a schematic diagram of the split structure of the present invention;

[0013] Figure 3 It is a schematic diagram of the split structure of the front pressing block of the present invention;

[0014] Figure 4 It is a schematic diagram of the use state of the present invention;

[0015] Figure 5 It is a reference diagram of the assembly process of the present invention;

[0016] Figure 6 This is a process diagram of the belt of the present invention entering the wheel groove. DETAILED DESCRIPTION

[0017] Referring to the accompanying drawings, the elastic belt installation tool includes a front clamping block 1 arranged in an arc shape and a rear clamping block 2 inserted into the front clamping block 1, the front clamping block 1 has a first arc-shaped guide plate 11, the inner arc radius of the first arc-shaped guide plate 11 is adapted to the outer diameter of the pulley, a support vertical plate 8 is provided on the front side of the first arc-shaped guide plate 11, the support vertical plate 8 is located at one end of the axial direction of the first arc-shaped guide plate 11, an arc-shaped slot 18 for inserting the rear clamping block 2 is formed between the bottom surface of the first arc-shaped guide plate 11 and the top surface of the support vertical plate 8, the clamping block 2 is inserted into the clamping block 1 through the arc-shaped slot 18, and the two constitute a belt guide groove. The arc-shaped slot 18 is arranged along the circumferential direction of the first arc-shaped guide plate 11. The bottom surface of the first arc-shaped guide plate 11 is fixedly connected to the top surface of the supporting vertical plate 8 at one end of the circumferential direction of the first arc-shaped guide plate 11, and an open end of the arc-shaped slot 18 is formed relative to the other end. The end of the first arc-shaped guide plate 11 at the rear end of the opening of the arc-shaped slot 18 is provided with an arc-shaped baffle 20 extending in the axial direction. The radial thickness of the arc-shaped baffle 20 is equal to the radial width of the slot 18 and slightly larger than the radial thickness of the rear clamping block 2; the rear clamping block 2 has a second arc-shaped guide plate 21, and the front side of the second arc-shaped guide plate 21 is provided with a radially oriented connecting plate 5, and the rear side of the second arc-shaped guide plate 21 is provided with a radially oriented arc-shaped baffle 6, and the axial width of the second arc-shaped guide plate 21 is greater than the axial width of the first arc-shaped guide plate 11. After the plate 2 is inserted along the open end of the arc-shaped slot 18, one end of the second arc-shaped guide plate 2 in the circumferential direction rests on the arc-shaped baffle 20, and the radial thickness of the second arc-shaped guide plate 2 is slightly smaller than the radial thickness of the arc-shaped baffle 20. A threaded through hole 19 is provided on the connecting plate 5, and a positioning circular hole 10 corresponding to the axial direction of the threaded through hole 19 is provided on the supporting vertical plate 8. The positioning circular hole 10 is a blind hole, and the threaded through hole 19 is provided with an adjusting bolt 3 inserted into the positioning circular hole 10 so that the rear clamping block 2 can move axially relative to the front clamping block 1. The rear side of the supporting vertical plate 8 of the front clamping block 1 is in contact with the front end face of the pulley. When the adjusting bolt 3 is tightened, it presses against the front clamping block 1 while driving the rear clamping block 2 to move forward until the arc-shaped baffle 6 of the rear clamping block 2 is in contact with the rear end face of the pulley, and then continues to tighten until the installation tool is clamped with the pulley. The adjusting bolt 3 can be used as a turning interface. The same bolt is used for clamping and fixing the installation tool and turning. There is no need to switch sleeves for turning. The turning direction is consistent with the tightening direction of the bolt. In this way, clamping force is still generated between the installation tool and the pulley during turning, without the risk of loosening, and the assembly efficiency is high.

[0018] In order to make the installation tool more universal and not limited by the distance between the front end face of the pulley and the wheel groove, and realize different belt entry positions, a movable vertical plate 9 corresponding to the movable vertical plate 9 is provided at the rear side of the support vertical plate 8. When in use, the movable vertical plate 9 and the arc-shaped baffle plate 6 of the rear clamping block 2 are clamped on the front and rear end faces of the pulley. The movable vertical plate 9 has an arc-shaped top surface adapted to the inner circumferential surface of the first arc-shaped guide plate 11, and guides the first arc-shaped guide plate 11 without affecting the insertion of the first arc-shaped guide plate 11 into the arc-shaped slot 18. The support vertical plate 8 is provided with a through hole 13, which is located at one end of the circumferential opening direction of the arc-shaped slot 18. A positioning pin 15 is provided at the approximately middle position of the rear side of the support vertical plate 8. The movable vertical plate 9 is provided with a positioning pin hole 16 corresponding to the positioning pin 15 and a threaded hole 17 corresponding to the through hole 13. The through hole 13 is provided with a locking bolt 4 screwed in the threaded hole 17. The locking bolt 4 between the supporting vertical plate 8 and the moving vertical plate 9 is provided with a gasket 14. By replacing the gasket 14 with different thicknesses, it can adapt to pulleys of different specifications and the distance from the belt end face to the wheel groove, which is more economical. The first arc guide plate 11 gradually widens from the end of the arc groove 18 in the circumferential direction of the opening direction along the extension direction of the arc groove 18, and an arc guide surface 12 and a straight guide surface 7 are formed on the rear side end face of the first arc guide plate 11, which can better guide the belt into the wheel groove.

[0019] The method of using and assembling the present invention is shown in Figure 5 , Figure 6 First, install one end of the belt on a pulley, align the belt with the pulley, then install the installation tool on the other pulley, clamp the front and rear clamping blocks on the front and rear end surfaces of the pulley by adjusting the bolts 3, install the other end of the belt on the second arc-shaped guide plate 21, use the adjusting bolts 3 as the turning interface, and tighten the wrench 22 to make the pulley rotate clockwise. After the belt passes through the arc-shaped guide surface 12 on the rear end surface of the first arc-shaped guide plate 11 and the straight guide surface 7, ensure that the belt enters the groove in the correct position. Figure 6 The figure shows the process of the belt (shown by the dotted line) passing through the installation tool from the entry position to the groove position. After the belt is in the groove at the correct position, the adjustment bolt 3 is reversely turned by tightening the wrench 22, and the installation tool is removed from the pulley, and the elastic belt is installed.

Claims

1. An elastic belt installation tool, characterized in that The invention comprises an arc-shaped front pressing block (1) and a rear pressing block (2) inserted into the front pressing block (1), wherein the front pressing block (1) has a first arc-shaped guide plate (11), a support vertical plate (8) is provided on the front side of the first arc-shaped guide plate (11), an arc-shaped slot (18) for inserting the rear pressing block (2) is formed between the bottom surface of the first arc-shaped guide plate (11) and the top surface of the support vertical plate (8), and the arc-shaped slot (18) is arranged along the circumferential direction of the first arc-shaped guide plate (11); the rear pressing block (2) having a second arc-shaped guide plate (21), a radially oriented connecting plate (5) being provided on the front side of the second arc-shaped guide plate (21), a radially oriented arc-shaped baffle (6) being provided on the rear side of the second arc-shaped guide plate (21), the axial width of the second arc-shaped guide plate (21) being greater than the axial width of the first arc-shaped guide plate (11); a threaded through hole (19) being provided on the connecting plate (5), and a positioning circular hole corresponding to the axial direction of the threaded through hole (19) being provided on the supporting vertical plate (8) (10), the positioning circular hole (10) is a blind hole, the threaded through hole (19) is provided with an adjustment bolt (3) inserted into the positioning circular hole (10) so that the rear clamping block (2) can move axially relative to the front clamping block (1); the rear side of the support vertical plate (8) is provided with a movable vertical plate (9) arranged corresponding to it, the support vertical plate (8) is provided with a through hole (13), the through hole (13) is located at one end of the circumferential opening direction of the arc-shaped slot (18), and a positioning bolt (3) is provided at a substantially middle position on the rear side of the support vertical plate (8). A positioning pin (15) is provided on the movable vertical plate (9), a positioning pin hole (16) corresponding to the positioning pin (15) and a threaded hole (17) corresponding to the through hole (13); a locking bolt (4) is provided in the through hole (13) and is screwed into the threaded hole (17); a gasket (14) is sleeved on the locking bolt (4) between the supporting vertical plate (8) and the movable vertical plate (9); and the movable vertical plate (9) has an arc-shaped top surface adapted to the inner circumferential surface of the first arc-shaped guide plate (11).

2. The elastic belt installation tool according to claim 1, characterized in that The first arc-shaped guide plate (11) gradually widens from the end of the arc-shaped clamping groove (18) in the circumferential opening direction along the extension direction of the arc-shaped clamping groove (18), and an arc-shaped guide surface (12) and a straight guide surface (7) are formed on the rear end surface of the first arc-shaped guide plate (11).

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