JPH04105244U - Transmission belt tension adjustment mechanism - Google Patents

Abstract

(57) [Summary] [Objective] To provide a tension adjustment mechanism that uses a bracket having grooves with excellent workability, which reduces cost and weight, and prevents adjustment bolts from rattling. [Configuration] A tension pulley 11, a boss portion 13 to which the rotation shaft 12 of the tension pulley 11 is attached, an adjustment bolt 8 for adjusting the pressing force of the tension pulley 11 against the transmission belt 18, and the tension pulley 11.
A parallel part 5 parallel to the adjusting bolt 8 and a vertical part receiving the reaction force of the tension pulley 11 applied to the adjusting bolt 8 via the boss part 13. In the tension adjustment mechanism 1, a washer 14 is used as a means for transmitting pressure to the vertical portion 3, and an engaging means for engaging the washer 14 and the bracket 2 is connected to the washer 14 and the bracket 2. Provided on one or both of 2.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is used to transmit engine rotation to compressors, generators, etc. in automobiles, etc. Transmission belt tension adjustment mechanism that adjusts the tension of the belt Regarding.

0002

[Conventional technology]

Conventionally, the tension of the belt that transmits the rotation of the automobile engine to the compressor, etc. has been adjusted. The tension adjustment mechanism 1 has a tension pulley 101 as shown in FIG. This is done by 02.

0003 In FIG. 6, the rotation of the engine 103 is controlled by the drive belt 1 by the drive pulley 104. 05 to the pulleys 108 and 109 of the compressor 106 and generator 107. be reached. This tension adjustment mechanism 102 is shown in FIG. 7, which is an enlarged view of part A in FIG. As shown, an adjustment bolt passes through a bolt hole 115 formed in the bracket 110. It is clamped by the head 112 of the head 111 and two tightening and fixing nuts 113, 114. and fix the drive belt 1 of the tension pulley 101 with the nuts 113 and 114. The reaction force 120 generated by the pressing force 119 against 05 was received.

0004 To adjust the adjustment bolt 111, first turn the double nuts 113 and 114 in the direction opposite to the head. then turn the adjustment bolt 111 with a box wrench etc. to set the tension. The tension of the drive belt 105 is adjusted by changing the position of the pulley 101 in the axial direction. Then, the double nuts 113 and 114 were turned to fix them. .

[0005] In addition, the ones shown in FIGS. 8(a) and 8(b) are designed to make it easier to install the adjustment bolt 111. For this purpose, cutout holes (hereinafter referred to as grooves) 11 are provided in the vertical portion 117 of the L-shaped bracket. 6 and has an inner diameter smaller than the diameter of the thread of the adjustment bolt 111. A collar 118 connects a washer 121 having a diameter larger than the groove 116 to the vertical It is pressed against part 117 and receives the reaction force.

[0006]

[Problem that the idea aims to solve]

However, in the tension adjustment mechanism 102 shown in FIG. 5 through the adjustment bolt 111, and a double nut 1 for tightening and fixing. 13,114 must be screwed in, making it heavier, more expensive, and easier to manufacture. There were problems such as poor performance.

[0007] In addition, in the case where the groove 116 shown in FIG. 8 is formed, the adjustment bolt 111 is rotated. When moving, the rotational force 123 acting on the head 112 of the adjustment bolt 11 and the reaction force 12 0 causes a force to act in the direction 122 that causes the adjustment bolt 111 to fall out of the groove 116. , the adjustment bolt 11 fluctuated and rattled.

[0008] For this reason, this invention can reduce costs and weight, as well as improve workability. To provide a tension adjustment mechanism that does not cause rattling or fluctuation of the adjustment bolt. be.

[0009]

[Means to solve the problem]

Therefore, this invention presses the transmission belt to give tension to the transmission belt. The tension pulley that rotates, and the boss to which the rotation shaft of this tension pulley is attached. , is screwed into this boss part to adjust the pressing force of the tension pulley against the transmission belt. and an adjustment hole into which the rotating shaft of the tension pulley is inserted. , a parallel part that is parallel to the adjustment bolt, and a boss part that engages the adjustment bolt. The structure consists of a bracket consisting of a vertical part that absorbs the reaction force of the tension pulley. In the transmission belt tension adjustment mechanism, the adjustment bolt is provided with an annular structure. The reaction force applied to the adjusting bolt by contacting the vertical part of the bracket is A washer for transmission to the vertical portion is provided, and the washer and the bracket engage with each other. This is because the engaging means is provided on both or one side.

0010

[Effect]

Therefore, in this invention, a washer is used instead of a fixing nut. In addition to reducing weight and cost, the washer and brush By providing a means for engaging the adjustment bolt, fluctuation and rattling of the adjustment bolt can be prevented. It is possible.

[0011]

【Example】

Hereinafter, embodiments of this invention will be described with reference to the drawings.

0012 1 to 3(a) and (b), the tension adjustment mechanism 1 is illustrated, and the tension adjustment mechanism 1 is shown in FIG. The racket 2 is L-shaped, with a groove 4 formed on one side (vertical part) 3 of the short side, and a groove 4 formed on the long side (vertical part) 3. An adjustment hole 6 that is long in the longitudinal direction is formed in the side (horizontal part) 5. Also, this block The following washer 15 is attached to the connecting part between the vertical part 3 and the horizontal part 5 of the racket 2. A fitting hole 17 into which the claw 16 fits is formed. This bracket 2 is, for example, It is fixed by a holding shaft 7.

[0013] The adjustment bolt 8 is arranged parallel to the horizontal part 5 of the bracket 2, and has a hexagonal shape. It has a head 9 and a threaded part 10, and a shaft 12 of a tension pulley 11 is connected to the threaded part 10. A supporting boss 13 is screwed together.

[0014] Further, the non-threaded portion formed between the head 9 and the threaded portion 10 of the adjustment bolt 8 is threaded. A collar 14 having an inner diameter smaller than the diameter of the thread of the portion 10 is disposed in an annular manner, and further Adjacent to this collar 14 is a wire having an inner diameter smaller than the outer diameter of the collar 14. A washer 15 is provided annularly in the non-threaded portion. Therefore, color 14 is , engages with the thread of the adjustment bolt 8, receives pressing force from it and transmits it to the washer 14. ing.

[0015] The washer 15 has a locking pawl 16 extending in the axial direction from a part of the outer circumference of the washer 15. It is formed as an extension and fits into the fitting hole 17.

[0016] Therefore, when the head 9 of the adjustment bolt 8 is rotated with a wrench or the like, The boss part 13 moves along the adjustment bolt 8, and is thereby attached to the boss part 13. The tension pulley 11 moves through the shaft 12, and the tension pulley 11 comes into contact with the By changing the pressing force of the transmission belt 18, the tension of the transmission belt 18 can be changed. The situation is adjusted accordingly.

[0017] Incidentally, the force 1 generated by the rotation of the adjustment bolt 8 in the direction of falling off the groove 4 9 is blocked by the locking claw 16 of the washer 15 fitting into the fitting hole 17. The adjustment bolt 8 can be rotated stably.

[0018] Furthermore, in another embodiment shown in FIG. It has left and right locking claws 21a, 21b that lock from both sides, and this The shape of the horizontal part 5 of the bracket 2 is adjusted according to the shape of the left and right locking claws 21a, 21b. has a trapezoidal cross section and the locking claws 21a. 21b can be easily fitted.

[0019] As a result, this structure can achieve the same effect as the one described above. It is possible.

[0020] Another embodiment shown in FIG. The washer 22 is provided with two rectangular metal washers 23 at the front and back. One end is glued to the plate, and the other side is formed into a plate spring shape with a predetermined width. The washer 22 is connected to a washer stop 23 formed at the end of the vertical part of the bracket 2. It engages with the horizontal part 5 to prevent it from coming off, and is held unrotatably between the upper surface of the horizontal part 5. Ru.

[0021] The washer 22 is shaped like a leaf spring with one end glued and the other open. , so that the washer 22 does not disengage when the adjustment bolt 8 moves to the right in the figure. This is to spread the word.

[0022] In addition, in order to further improve the above-mentioned effect, the through holes of the washers 15, 20, 22 are You can also put burrings on 24, 25, and 26 to have a color effect and eliminate them. Alternatively, the washers 15, 20, 22 and the collar 14 may be integrally molded. .

[0023]

[Effect of the idea]

As explained above, according to this invention, one or both of the washer and the bracket can be used. By providing an engagement means to prevent falling off on the side, the through hole of the adjustment bolt is made easier to work with. Even with a good groove, it is possible to prevent the adjustment bolt from fluctuating and rattling, and it is also possible to prevent the adjustment bolt from wobbling. Since there is no need to use a cutter, costs can be reduced and the weight of the equipment itself can be reduced. is also achievable.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view of a tension adjustment mechanism according to a first embodiment of the invention.

FIG. 2 is a front view of the tension adjustment mechanism according to the first embodiment of the invention.

FIG. 3 is (a) a perspective view of a washer and (b) a partial perspective view of a bracket of the first embodiment of the invention.

FIG. 4 is (a) a partial side sectional view and (b) a partial front sectional view of a tension adjustment mechanism according to a second embodiment of the invention.

FIG. 5 is (a) a partial side sectional view and (b) a partial front sectional view of a tension adjustment mechanism according to a third embodiment of the invention;

FIG. 6 is an explanatory diagram illustrating how the tension adjustment mechanism is attached.

FIG. 7 is a partial side sectional view of a conventional tension adjustment mechanism using a double nut.

FIG. 8 is a partial side sectional view of a conventional tension adjustment mechanism using grooves.

[Explanation of symbols]

1 Tension adjustment mechanism 2 Bracket 3 Vertical part 4 Groove 5 Horizontal part 6 Adjustment hole 8 Adjustment bolt 9 Head 10 Thread part 11 Tension pulley 13 Boss part 14 Color 15, 20, 22 Washer 16 Locking claw 17 Fitting hole

Claims (1)

[Scope of utility model registration request] 1. A tension pulley that presses a transmission belt to apply tension to the transmission belt; a boss portion to which a rotating shaft of the tension pulley is attached; an adjustment bolt that adjusts the pressing force on the belt; an adjustment hole into which the rotating shaft of the tension pulley is inserted; a parallel portion that is parallel to the adjustment bolt; and a tension that is applied to the adjustment bolt via a boss portion. In a tension adjustment mechanism for a transmission belt, the transmission belt tension adjustment mechanism includes a bracket consisting of a vertical part that absorbs the reaction force of a pulley, and a tension adjustment mechanism that is provided in an annular shape on the adjustment bolt and contacts the vertical part of the bracket to reduce the reaction force applied to the adjustment bolt. A tension adjustment mechanism for a transmission belt, characterized in that a washer for transmitting transmission to the vertical portion is provided, and engagement means for engaging the washer and the bracket is provided on either or both sides.