CN211343899U

CN211343899U - Belt tension auxiliary adjusting structure applied to mechanical tensioning belt wheel system

Info

Publication number: CN211343899U
Application number: CN201922401325.1U
Authority: CN
Inventors: 曹陈; 薛勇; 周文彦
Original assignee: WEICHAI POWER YANGZHOU DIESEL ENGINE CO Ltd
Current assignee: WEICHAI POWER YANGZHOU DIESEL ENGINE CO Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-08-25
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses a be applied to supplementary regulation structure of belt tension of mechanical tensioning belt train, including the installing support who sets up the rectangular hole, the inboard of installing support is equipped with the tensioning piece, the outside of installing support is equipped with the idler, tensioning piece and idler are connected through the fastening bolt who passes the rectangular hole, be equipped with tie bolt on the tensioning piece, the installing support setting is worn out to tie bolt's lower extreme, be connected with fastening nut on the tip of the tie bolt who extends the installing support, the outside of installing support is equipped with the rack that sets up along rectangular hole one side, the tooth of rack is towards the rectangular hole, the idler includes the wheel body, the installation cover is installed to the wheel body internal rotation, be equipped with the external tooth with rack toothing in the interior section of installation cover, be equipped with the section of twisting, be equipped with lock nut on the fastening bolt tip of wearing out the installation. The utility model discloses a to the quick adjustment of take-up pulley, avoid belt tension atress direction not appear the emergence of upset slope in a plane, increase the stability of idler.

Description

Belt tension auxiliary adjusting structure applied to mechanical tensioning belt wheel system

Technical Field

The utility model relates to a be applied to supplementary structure of adjusting of belt tension of mechanical tensioning belt train.

Background

At present, the tension of a belt of an engine adopting a mechanical tensioning mode and a front-section wheel train is adjusted by means of threads of a tensioning bolt. The assembly time needs rely on the screw thread of tie bolt to adjust, and tie bolt's screw thread pitch is less, and in the adjustment process, the spanner rotates the round, and the idler position changes a screw pitch, and consequently its governing speed is slower. In the adjusting process, the idler wheel receives the tension of the tension bolt and the reverse tension of the belt to generate overturning moment, so that the idler wheel is easy to incline axially, the bearing force of the idler wheel is uneven in the axial direction, and the service life of the idler wheel bearing is shortened. In the use, because the tie bolt only leans on fastening nut to fix, can influence the tensioning of belt when equipment vibration appears and leads to fastening nut not hard up to need readjustment, influence live time.

Disclosure of Invention

The utility model discloses the technical problem that needs to solve provides a be applied to belt tension auxiliary adjusting structure of mechanical tensioning belt train, has realized the quick adjustment to the take-up pulley, and the fast assembly of being convenient for has avoided belt tension atress direction not the emergence of upset slope to appear in a plane simultaneously, has increased adjustment mechanism's stability.

In order to solve the technical problem, the utility model comprises a mounting bracket provided with a strip hole, the inner side of the mounting bracket is provided with a tensioning block, the outer side of the mounting bracket is provided with an idler wheel corresponding to the tensioning block, the tensioning block and the idler wheel are connected through a fastening bolt passing through the strip hole, the tensioning block is provided with a tensioning bolt, the tensioning bolt is vertical to the fastening bolt, the lower end of the tensioning bolt penetrates out of the mounting bracket, the end part of the tensioning bolt extending out of the lower end of the mounting bracket is connected with a fastening nut, the structure is characterized in that the outer side of the mounting bracket is provided with a rack arranged along one side of the strip hole, the tooth direction of the rack faces towards the strip hole, the idler wheel comprises a wheel body, a mounting sleeve is installed in the wheel body in a rotating way, the inner section of the mounting sleeve is provided with external teeth meshed with the rack, the outer section of, and a locking nut is arranged on the end part of the fastening bolt penetrating out of the mounting sleeve.

The torsion section is a square nut fixedly connected to the outer end of the mounting sleeve, a through hole of the square nut is larger than the outer diameter of the fastening bolt, the fastening bolt penetrates out of the square nut and is connected with the locking nut, a counter bore is formed in the outer end face of the wheel body, and the square nut is partially arranged in the counter bore.

The mounting sleeve and the wheel body are rotatably mounted through a bearing.

The mounting bracket comprises a vertical frame and a cross frame connected to the lower end of the vertical frame, the vertical frame and the cross frame are vertically arranged, the strip hole is formed in the vertical frame, and a guide hole used for penetrating through the tension bolt is formed in the cross frame.

After adopting above-mentioned structure, when the equipment, twist reverse the section through the rotation and drive the installation cover and rotate to drive the external tooth and mesh on the rack and remove, thereby adjust the position of idler, when the idler reachs the tensioning position, carry out fine adjustment through tie bolt earlier and fix, then lock nut. Compared with the prior art in which adjustment is carried out by rotating the fastening nut alone, the meshing adjustment range of the rack and the external teeth is large, the time is saved, and quick assembly is realized; when the idler wheel is adjusted up and down, due to the meshing of the external teeth and the rack, the torsional force borne by the idler wheel is obviously smaller than the force when the idler wheel is adjusted by the tensioning block, so that the phenomenon that the tension force direction of the belt is not in a plane and the belt is overturned and inclined is avoided; when vibration occurs during use, one of the fastening nut or the locking nut is loosened, and the fastening nut or the locking nut which is not loosened can continuously ensure the stability of the installation position of the idler wheel.

To sum up, the utility model discloses simple structure, the quick adjustment to the take-up pulley has been realized in the operation of being convenient for, has avoided belt tension atress direction not to appear the emergence of upset slope in a plane simultaneously, increases the technological effect of the stability of idler.

Drawings

The invention will be further explained with reference to the following figures and examples:

FIG. 1 is a schematic diagram of a prior art configuration;

fig. 2 is a schematic structural diagram of the present invention;

FIG. 3 is an exploded view of FIG. 2;

in the figure: 1-mounting bracket, 2-strip hole, 3-fastening bolt, 4-tensioning block, 5-tensioning bolt, 6-rack, 7-mounting sleeve, 8-external tooth, 9-square nut, 10-idle wheel, 11-locking nut, 12-fastening nut, 13-vertical frame and 14-horizontal frame.

Detailed Description

In order to clearly understand the design concept of the present invention and the embodiments based on the design concept, it is necessary to introduce the prior art adjusting belt tension before describing the embodiments of the present invention. At present, the tension of a belt of an engine adopting a mechanical tensioning mode and a front-section wheel train is adjusted by means of threads of a tensioning bolt 5. Referring to fig. 1, the adjusting process is adjusted by the threads of the tensioning bolt 5, the thread pitch of the bolt is small, the adjusting process is too long, and the assembling rhythm is slow. Because the directions of bolt tension and belt tension received by the idler pulley 10 are different and are not on the same plane, the idler pulley 10 tends to turn over and deflect, and meanwhile, when the idler pulley is used, the phenomenon of looseness is easy to occur, and the service time is influenced.

For convenience of description, referring to fig. 2, taking the outward direction perpendicular to the paper surface as the front, taking the left direction as the left, and taking the upward direction as the upper direction, in order to solve the above technical problems, referring to fig. 2 and fig. 3, the belt tension auxiliary adjusting structure applied to the mechanical tensioning belt train comprises a mounting bracket 1 provided with a long hole 2, a tensioning block 4 is arranged on the inner side of the mounting bracket 1, an idler pulley 10 corresponding to the tensioning block 4 is arranged on the outer side of the mounting bracket 1, where the inner side of the mounting bracket 1 is the left side of the mounting bracket 1, the outer side of the mounting bracket 1 is the right side of the mounting bracket 1, the tensioning block 4 and the idler pulley 10 are connected through a fastening bolt 3 penetrating through the long hole 2, a tensioning bolt 5 is arranged on the tensioning block 4, and the tensioning bolt 5 is perpendicular to the fastening; the mounting bracket 1 comprises a vertical frame 13 and a cross frame 14 connected to the lower end of the vertical frame 13, the vertical frame 13 is arranged along the up-down direction, the cross frame 14 is arranged along the left-right direction, the right end of the cross frame 14 is vertically connected with the left side of the vertical frame 13, namely, the tensioning block 4 is positioned in a space formed by the cross frame 14 and the vertical frame 13, the long hole 2 is arranged on the vertical frame 13, the cross frame 14 is provided with a guide hole, the lower end of the tensioning bolt 5 penetrates through the guide hole of the cross frame 14, the end part of the tensioning bolt 5 extending out of the cross frame 14 is connected with a fastening nut 12, a gasket is sleeved on the fastening bolt 3 between the fastening nut 12 and the cross frame 14, and the fastening of the fastening nut 12 is increased; on the basis, the outer side of the vertical frame 13 is provided with a rack 6 arranged along one side of the elongated hole 2, the tooth direction of the rack 6 faces the elongated hole 2, in the embodiment, the rack 6 is arranged at the rear side of the elongated hole 2, and the tooth direction of the rack 6 is arranged forward, or the rack 6 is arranged at the front side of the elongated hole 2, and the tooth direction of the rack 6 is arranged backward; the idler wheel 10 comprises a wheel body, a mounting sleeve 7 is rotatably mounted in the wheel body, external teeth 8 meshed with the rack 6 are arranged on the inner section of the mounting sleeve 7, namely the inner section of the mounting sleeve 7 is in a gear shape, the external teeth 8 can also be gears mounted on the mounting sleeve 7, a torsion section is arranged on the outer section of the mounting sleeve 7, the torsion section is a square nut 9 fixedly connected to the outer end of the mounting sleeve 7, a through hole of the square nut 9 is larger than the outer diameter of the fastening bolt 3, a counter bore is arranged on the outer end face of the wheel body, and the square nut 9 is partially arranged in the counter bore; the torsion section can also be formed by processing the right end of the mounting sleeve 7 into an end part with a non-circular section, and the right end of the mounting sleeve 7 extends out of the wheel body; the torsion section is convenient for a user to rotate the mounting sleeve 7 so as to adjust, the inner section of the mounting sleeve 7 is a part of the mounting sleeve 7 close to the vertical frame 13, the outer section of the mounting sleeve 7 is a part of the mounting sleeve 7 far away from the vertical frame 13, and the end part of the fastening bolt 3 penetrating out of the mounting sleeve 7 is provided with a locking nut 11.

When the utility model is used and assembled, the mounting sleeve 7 is driven to rotate by rotating the square nut 9, the gear on the mounting sleeve 7 rotates along with the rotation of the mounting sleeve 7, and the mounting sleeve 7 is driven to move up and down along with the meshing of the gear and the rack 6, compared with the prior art that the fastening nut 12 is screwed to be adjusted by the thread of the tension bolt 5, the gear and rack 6 has large matching adjustment range, thereby saving time and realizing rapid assembly of the quick adjustment of the tension pulley; when the idler 10 is adjusted up and down, because the part of square nut 9 is established in the counter bore of idler 10, when rotating square nut 9 and adjusting tension, be equivalent to driving idler 10 and remove, the direction of force that idler 10 received is close to the direction of force of idler 10 with the belt, for the power when adjusting idler 10 through tensioning block 4 among the prior art, avoided belt tension atress direction not appear the emergence of upset slope in a plane, this structure can be at the engine that adopts mechanical tensioning mode belt train, under the prerequisite of not carrying out great design change, faster realization belt tension's regulation for the production rhythm. Simultaneously the utility model discloses when using, because other external factors, for example vibration, can lead to fastening bolt 3 not hard up to make tensioning bolt 5's fastening force diminish, tensioning piece 4 can not be fixed in the position on the riser, influence the tensile force of idler 10, and even tensioning bolt 5 is not hard up can be guaranteed in the meshing installation of external tooth 8 and rack 6, the position of tensioning piece 4 can not appear changing, that is to say that the tensile force of idler 10 can not receive the influence, the utility model discloses can be applied to the engine that present belt train adopted mechanical tensioning mode, follow the quality and the user experience of belt train belt tension uniformity and easy adjustment performance promotion engine product.

Claims

1. The utility model provides a be applied to supplementary regulation structure of belt tension of mechanical tensioning belt train, is including offering installing support (1) in rectangular hole (2), the inboard of installing support (1) is equipped with tensioning piece (4), the outside of installing support (1) is equipped with idler (10) that correspond with tensioning piece (4), tensioning piece (4) with idler (10) are through passing fastening bolt (3) of rectangular hole (2) are connected, be equipped with tensioning bolt (5) on tensioning piece (4), just tensioning bolt (5) with fastening bolt (3) are mutually perpendicular, installing support (1) setting is worn out to the lower extreme of tensioning bolt (5), is connected with fastening nut (12), its characterized in that on the tip of extending tensioning bolt (5) of installing support (1) lower extreme: the outside of installing support (1) is equipped with rack (6) that sets up along rectangular hole (2) one side, the tooth of rack (6) is to the orientation rectangular hole (2), idler (10) include the wheel body, and installation cover (7) are installed to the wheel body internal rotation, be equipped with on the interior section of installation cover (7) with external tooth (8) that rack (6) meshed, be equipped with on the outer section of installation cover (7) and twist reverse the section, wear out to be equipped with lock nut (11) on fastening bolt (3) tip of installation cover (7).

2. A belt tension assist adjustment structure for use in a mechanical tensioner pulley system as set forth in claim 1, wherein: the torsion section is a square nut (9) fixedly connected to the outer end of the installation sleeve (7), the through hole of the square nut (9) is larger than the outer diameter of the fastening bolt (3), the fastening bolt (3) penetrates out of the square nut (9) to be connected with the locking nut (11), a counter bore is formed in the outer end face of the wheel body, and the square nut (9) is partially arranged in the counter bore.

3. A belt tension assist adjustment structure for use in a mechanical tensioner pulley system as set forth in claim 1, wherein: the mounting sleeve (7) and the wheel body are rotatably mounted through a bearing.

4. A belt tension assist adjustment structure for use in a mechanical tensioner pulley system as set forth in claim 1, wherein: installing support (1) is including erecting frame (13) and connecting in horizontal bracket (14) of erecting frame (13) lower extreme, erect frame (13) with horizontal bracket (14) set up perpendicularly, rectangular hole (2) are seted up in erect on the frame (13), offer the guiding hole that is used for passing tensioning bolt (5) on horizontal bracket (14).