Belt tensioning device

Abstract

The utility model discloses a belt tensioning device which comprises a mounting base, a belt tensioning device and a belt tensioning device. The swing adjusting plate is rotatably installed on the swing supporting hole with the axis of the swing supporting hole as the swing center, a connecting plate is arranged on one side of the swing adjusting plate and used for being connected with a power input shaft of working equipment, and a belt wheel is arranged on the other side of the swing adjusting plate and used for being connected with a power output shaft of the working equipment. The belt pulley is connected with the connecting plate through a transmission shaft penetrating through the swing adjusting plate; one end of the threaded pull rod assembly is rotatably mounted on the mounting base, and the other end of the threaded pull rod assembly penetrates through the swing adjusting plate and is screwed with a nut. According to the belt tensioning device, the tensioning degree of the belt is adjusted through swinging of the swinging adjusting plate, the adjusting direction of the belt tensioning device does not apply large radial force to a power input shaft of a pump compared with the prior art, and the service life of the pump is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical equipment technical field, specifically, relate to a belt tensioner. BACKGROUND

[0002] The snow removal vehicle can be refitted with some equipment to complete some auxiliary functions by using the mounted equipment. The mounted equipment usually uses a secondary engine as a power source to provide working power for the mounted equipment. The secondary engine output shaft outputs torque to drive the hydraulic pump of the equipment to rotate and provide hydraulic power to make the equipment work. Most refitting uses a belt and pulley mechanism as a transmission mechanism to directly connect the secondary engine and the hydraulic pump to drive the equipment to work. Usually, a belt and pulley is directly installed on the secondary engine output shaft and the hydraulic pump input shaft, the hydraulic pump is installed on a fixed plate, and then the belt is hung and tensioned. Although this installation method achieves the purpose of working of the mounted equipment, the tensioning degree of the belt cannot be adjusted. Since the internal structure of the hydraulic pump is very precise, the hydraulic pump input shaft is subjected to a large radial force and impact force when the secondary engine starts and operates, which causes the input shaft and the gear of the internal cavity of the hydraulic pump to be offset and meshed imprecisely, the input shaft rotates and jumps greatly, and the internal bearing and the shell are worn out, so that the hydraulic pump cannot generate sufficient hydraulic pressure and the hydraulic pump is prone to premature failure. SUMMARY

[0003] To solve the above problems, the application provides a belt tensioner, which can conveniently connect the engine and the hydraulic pump, bear the radial force, conveniently adjust the tensioning of the belt, safely input power to the hydraulic pump, and prevent the structural components from being subjected to the impact of the radial force and prematurely failing.

[0004] The application provides a belt tensioner, which comprises:

[0005] A mounting base, provided with a swing support hole;

[0006] A swing adjusting plate, rotatably installed on the swing support hole with the axis of the swing support hole as the swing center, provided with a connecting plate on one side for connecting with the power input shaft of the working equipment, and provided with a pulley on the other side, the pulley being connected with the connecting plate through a transmission shaft penetrating the swing adjusting plate;

[0007] A threaded pull rod assembly, one end of which is rotatably installed on the mounting base, and the other end of which penetrates the swing adjusting plate and is screwed with a nut.

[0008] Optionally, the threaded pull rod assembly comprises:

[0009] A connecting sleeve is rotatably mounted on the swing adjusting plate at opposite sides thereof;

[0010] A threaded pull rod is rotatably mounted on the mounting base at one end thereof and passes through the connecting sleeve at the other end thereof;

[0011] A nut is screwed on the rod body at each of the two axial sides of the connecting sleeve.

[0012] Optionally, an arc-shaped track hole is further arranged on the mounting base and coaxially arranged with the swing supporting hole, and the swing adjusting plate is mounted on the arc-shaped track hole.

[0013] Optionally, a power transmission through hole is arranged on the swing adjusting plate, and the transmission shaft is coaxially connected to the connecting plate, the transmission shaft is connected to the belt pulley through the power transmission through hole, and a bearing is mounted between the transmission shaft and the power transmission through hole.

[0014] Optionally, the mounting base comprises a bottom plate and two mounting plates vertically and spacedly arranged on the bottom plate, and the arc-shaped track hole is arranged on the mounting plate.

[0015] Optionally, the swing adjusting plate comprises two plate bodies spacedly arranged and a connecting rib connected between the plate bodies.

[0016] Optionally, the swing adjusting plate is mounted on the arc-shaped track hole by means of a bolt passing through the swing adjusting plate and the arc-shaped track hole.

[0017] The belt tensioning device of the present application can be used on various devices driven by a belt and is not limited to snow removal devices. Compared with the prior art, the present application has the following beneficial effects:

[0018] (1) The belt tensioning device of the present application adjusts the tensioning degree of the belt by swinging the swing adjusting plate, and the adjusting direction does not exert a large radial force on the power input shaft of the pump, thereby prolonging the service life of the pump.

[0019] (2) The present application adjusts the swing angle of the swing adjusting plate by the nut of the threaded pull rod assembly until the tensioning degree of the belt reaches the ideal state, and the method is stable and reliable, convenient and fast. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 A perspective view of the belt tensioning device according to the embodiment of the present application;

[0021] Fig. 2 A front view of the belt tensioning device according to the embodiment of the present application;

[0022] Fig. 3 A sectional view of the belt tensioning device.

[0023] Reference signs:

[0024] mounting base 100, arc-shaped track hole 101, mounting bolt 102, swing support hole 103, bottom plate 105, mounting plate 106, swing adjusting plate 200, connecting plate 201, transmission shaft 202, bearing 203, threaded pull rod assembly 300, threaded pull rod 301, connecting sleeve 302, nut 303, belt pulley 400 DETAILED DESCRIPTION

[0025] The technical solutions of the utility model will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, "connection" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through intermediate medium. Among them, "fixed connection" refers to the relative position relationship after connection is unchanged. "Rotary connection" refers to the relative rotation after connection. The orientation terms mentioned in the embodiments of the present application, such as "inner", "outer", "clockwise", "counterclockwise", etc., are only the direction of the drawings, therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present application, and are not indicative or implied that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the embodiments of the present application.

[0027] In the prior art, the engine output shaft and the pump input shaft are directly mounted with pulleys respectively, the pump is mounted on a fixed plate, and then the belt is hung and tensioned. The belt tensioning is achieved by moving and adjusting the belt through the waist-shaped long hole on the fixed plate. This installation method makes the power input shaft of the pump directly subjected to radial force, which will damage the precision structure in the hydraulic pump cavity too early, and cause adverse effects. This fixed plate moves through the waist-shaped long hole to adjust the belt tensioning, which cannot achieve flexible adjustment, so that the belt tensioning degree with the two pulleys cannot achieve the best efficiency.

[0028] Please refer to Figs. 1 to 3The belt tensioning device of the embodiment comprises a mounting base 100 for mounting a swing adjusting plate 200 to provide a swing support point and an arc track line for the swing of the swing adjusting plate 200; the swing adjusting plate 200 adjusts the tension of the belt by swinging around the swing support point; and a threaded pull rod assembly 300 for adjusting and limiting the swing angle of the swing adjusting plate 200.

[0029] The mounting base 100 can be made of double-layered plates. For example, the mounting base 100 can comprise a bottom plate 105 and two mounting plates 106 vertically and spacedly arranged on the top surface of the bottom plate 105. The bottom plate 105 can be fixed to the ground or other component surface by bolts at a distance from the output shaft of the engine. The two mounting plates 106 are vertically arranged on the top surface of the bottom plate 105 with a certain spacing therebetween for mounting the swing adjusting plate 200.

[0030] The swing adjusting plate 200 can also comprise two parallel plate bodies and a connecting rib connected between the plate bodies, and the swing adjusting plate 200 can be mounted between the two mounting plates 106. Of course, the two plate bodies can also be mounted on the outer sides of the two mounting plates 106, or one on the inner side and one on the outer side.

[0031] In addition, the mounting base 100 can also use only one mounting plate 106, and the swing adjusting plate can also use only one plate body, which is not limited in the present application. In the following, only the case where both the mounting plate and the swing adjusting plate use two plates is taken as an example for illustration.

[0032] The two mounting plates 106 are provided with swing support holes 103 corresponding thereto, and the swing adjusting plate 200 is mounted on the swing support holes 103. The swing adjusting plate 200 can be mounted on the swing support holes 103 by passing the mounting bolts 102 through the swing support holes 103 and cooperating with the nuts of the mounting bolts. The swing adjusting plate 200 can swing around the swing support holes 103, but the swing amplitude of the swing adjusting plate 200 around the swing support holes 103 is large at this time.

[0033] An arc-shaped track hole 101 is provided on the mounting plate 106, and arc-shaped track holes can be provided on both mounting plates. The arc-shaped track hole 101 is coaxially arranged with the swing support hole 103, which makes the arc-shaped track hole 101 form a swing trajectory line with the axis of the swing support hole 103 as the center of rotation. A mounting bolt 102 can be passed through the arc-shaped track hole 101 to install the swing adjustment plate 200 on the mounting base 100. Specifically, the mounting bolt 102 passes through the mounting plate 106 and the swing adjustment plate 200, and is installed on the mounting base by screwing a nut onto the mounting bolt. The arc-shaped track hole can limit the swing range of the swing adjustment plate 200, thereby limiting the range of belt tension adjustment. Alternatively, a rod integrally formed with the mounting plate 106 can be inserted into the arc-shaped track hole.

[0034] A connecting plate 201 is fixedly connected to one end of the swing adjustment plate 200, parallel to the axis of the swing support hole 103, for connecting to the power input shaft of a working device, such as a hydraulic pump, generator, or cutting equipment. A pulley 400 is fixedly connected to the other end, parallel to the axis of the swing support hole 103. This pulley 400 is used to mount a belt, which can be fitted onto both the pulley 400 and the engine pulley, transmitting the engine's rotational power to the pulley 400 and subsequently to the power input shaft of the working device. The connecting plate 201 has mounting holes for connecting to the power input shaft of the working device, which will not be described in detail here.

[0035] In addition, this example uses an engine. The belt is not necessarily limited to the engine pulley. It can be connected to any pulley of the power output device, such as the pulley connected to the motor or gearbox.

[0036] In order to transmit the torque of the pulley 400 to the connecting plate 201, a power transmission through hole coaxial with the connecting plate 201 and the pulley 400 is provided on the swing adjustment plate 200. A drive shaft is installed in the power transmission through hole. One end of the drive shaft is coaxially connected to the pulley, and the other end is coaxially connected to the connecting plate. A bearing is installed between the drive shaft and the power transmission through hole.

[0037] For example, such as Fig. 3 As shown, a key (not shown), such as a flat key, is installed in the inner hole of the pulley 400. A drive shaft 202 is coaxially fixedly connected to the connecting plate 201. The drive shaft 202 passes through the power transmission through hole and is connected to the key. The key transmits the rotation of the pulley 400 to the drive shaft 202. A bearing 203 is installed between the drive shaft 202 and the power transmission through hole.

[0038] In the case of the rotation of the belt pulley, power is transmitted to the transmission shaft through the key connection, so as to transmit power to the connecting plate 201. The distance between the belt pulley 400 and the belt pulley of the engine can be adjusted through the swing of the swing adjusting plate 200, so that the tension of the belt can be adjusted, so that the belt is moderately tensioned to achieve the best effect of belt installation. The engine torque output is transmitted to the belt pulley through the belt, and the belt pulley transmits the torque to the power input shaft of the working equipment through the transmission shaft, so that the working equipment operates, for example, the working equipment is a pump, and the internal gear of the pump is driven to operate to generate hydraulic power.

[0039] The threaded pull rod assembly 300 comprises a threaded pull rod 301, a connecting sleeve 302 and a nut 303, wherein one end of the threaded pull rod 301 is rotatably connected to the mounting base 100, for example, a through hole can be provided on the threaded pull rod 301, and the threaded pull rod 301 is rotatably mounted on the mounting base by passing through the mounting bolt 102. A through hole is provided on the swing adjusting plate 200, the connecting sleeve 302 is rotatably mounted in the through hole, and the other end of the threaded pull rod passes through the connecting sleeve 302 in the axial direction of the connecting sleeve. Specifically, the opposite side walls of the connecting sleeve 302 respectively extend into the swing adjusting plate 200 through the fixed connecting connecting rods, so that the connecting sleeve 302 can rotate.

[0040] The nuts 303 are threadedly connected on the rod bodies on both sides of the connecting sleeve of the threaded pull rod, and the swing of the swing adjusting plate 200 can be controlled by screwing the two nuts 303. Specifically, as shown in Fig. 2 If the two nuts 303 are moved downward, the swing adjusting plate 200 is pulled to rotate clockwise, and if the two nuts 303 are moved upward, the swing adjusting plate 200 is pulled to rotate counterclockwise.

[0041] Of course, the utility model also has other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the utility model without departing from the spirit and essence of the utility model, but these corresponding changes and modifications all belong to the protection scope of the claims of the utility model.

Claims

1. A belt tensioner characterized by, The utility model relates to a swing adjusting device for working equipment, which comprises: a mounting base provided with a swing support hole; a swing adjusting plate rotatably mounted on the swing support hole with the axis of the swing support hole as the swing center, a connecting plate provided on one side of the swing adjusting plate for connecting with a power input shaft of the working equipment, and a belt pulley provided on the other side of the swing adjusting plate, the belt pulley being connected with the connecting plate through a transmission shaft passing through the swing adjusting plate; a threaded pull rod assembly rotatably mounted on the mounting base at one end and having a nut screwed at the other end passing through the swing adjusting plate.

2. Belt tensioner according to claim 1, characterized in that The threaded pull rod assembly comprises: a connecting sleeve rotatably mounted on the swing adjusting plate at opposite sides of the connecting sleeve; a threaded pull rod rotatably mounted on the mounting base at one end and passing through the connecting sleeve at the other end; a nut screwed on the rod body at both axial sides of the connecting sleeve.

3. The belt tensioner of claim 1, wherein An arc-shaped track hole coaxially arranged with the swing support hole is further provided on the mounting base, and the swing adjusting plate is mounted on the arc-shaped track hole.

4. The belt tensioner of claim 1, wherein A power transmission through hole is provided on the swing adjusting plate, the transmission shaft is coaxially connected with the connecting plate, the transmission shaft is connected with the belt pulley by passing through the power transmission through hole, and a bearing is mounted between the transmission shaft and the power transmission through hole.

5. The belt tensioner of claim 3, wherein The mounting base comprises a bottom plate and two mounting plates vertically and spacedly arranged on the bottom plate, and the arc-shaped track hole is arranged on the mounting plate.

6. The belt tensioner of claim 1, wherein The swing adjusting plate comprises two spaced plate bodies and a connecting rib connected between the plate bodies.

7. The belt tensioner of claim 3, wherein The swing adjusting plate is mounted on the arc-shaped track hole by passing through the swing adjusting plate and the arc-shaped track hole with bolts.

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