CN215861621U

CN215861621U - Belt wheel and belt wheel dismounting structure

Info

Publication number: CN215861621U
Application number: CN202122476775.4U
Authority: CN
Inventors: 陈家雄; 王贤; 邵必云; 马科; 杨小林
Original assignee: Chongqing Qiulong Technology Co ltd
Current assignee: Chongqing Qiulong Technology Co ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-02-18
Anticipated expiration: 2031-10-14

Abstract

The utility model relates to a belt wheel and a belt wheel dismounting structure, wherein the belt wheel is provided with a central hole; two internal thread holes are arranged on the belt wheel in a penetrating way. The belt wheel is sleeved on a rotating shaft of the motor through a central hole; a detachable backing plate is arranged above the internal thread hole; the two ends of the dismounting backing plate are respectively provided with a dismounting bolt, the dismounting bolts movably penetrate through the dismounting backing plate and are in threaded connection with the inner threaded holes of the belt wheels, and the head parts of the dismounting bolts are abutted against the dismounting backing plate; a supporting column is arranged between the disassembling backing plate and the upper end face of the rotating shaft so that a certain disassembling distance is reserved between the disassembling backing plate and the upper end face of the belt wheel. According to the utility model, only two symmetrical internal thread holes are needed to be arranged on the belt wheel, and the support column and the dismounting base plate are matched, so that the belt wheel can be connected through the dismounting bolt and the force is transmitted to the belt wheel in a balanced manner along the axial direction so as to be separated from the rotating shaft of the motor, the belt wheel is dismounted while the belt wheel and the shell of the motor are not damaged, and time and labor are saved.

Description

Belt wheel and belt wheel dismounting structure

Technical Field

The utility model belongs to the technical field of belt pulleys, and particularly relates to a belt pulley and a belt pulley dismounting structure.

Background

The belt pulley belongs to a hub part and is mainly used for occasions of transmitting power in a long distance, such as agricultural vehicles, tractors, automobiles, mining machinery, lathes, power output of small diesel engines, generators and the like. In the using process, the device including the belt pulley must consider the situation that the belt pulley may be replaced, taking the motor belt pulley as an example, from the design point of view, the free ends of the belt pulley and the motor shaft are usually in zero clearance sliding fit, the motor shaft and the central hole of the belt pulley are connected through a key to ensure synchronous rotation of the two, the belt pulley abuts against the shaft shoulder of the motor shaft towards the inner end face of the motor, the free end of the motor shaft is connected with the mounting nut through an external thread section and is fixed on the outer end face of the belt pulley, and the axial movement of the belt pulley is limited (some devices also adopt a pin or a snap spring to limit the axial movement); however, in actual installation and use, due to various reasons such as machining errors, key dimension errors, deformation and the like, when the pulley needs to be disassembled after long-time use, after the axial limiting piece is disassembled, the pulley is difficult to be directly disassembled from the motor shaft in a sliding way. In order to shorten the force arm, the belt pulley is usually adjacent to the end face of the shell of the motor, when the belt pulley is withdrawn, most of the currently used disassembling methods use tools to wedge between the belt pulley and the adjacent two end faces of the shell of the motor, and the belt pulley is pried and separated along the axial direction of the motor shaft, so that the belt pulley and the shell of the motor are easily damaged, and time and labor are wasted; meanwhile, the belt pulley has potential safety hazards, for example, a triangular wheel puller is adopted in some tools, and the belt pulley is separated from a motor rotating shaft through three stress points of three fixing claws in contact with the edge wheel wall of the belt pulley.

Disclosure of Invention

In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a belt wheel and a belt wheel dismounting structure, which can avoid the problem that the belt wheel is inconvenient to dismount from a rotating shaft of a driving mechanism at present, obtain the effects of convenient dismounting, no damage to the belt wheel and improvement of the belt wheel dismounting efficiency.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the outer circumferential surface of the belt wheel is provided with gear teeth which are uniformly distributed in the circumferential direction, the middle part of the belt wheel is provided with a central hole which is used for being connected with a rotating shaft of a driving mechanism, the central hole penetrates through the belt wheel, and the central hole is coaxial with the outer circumferential surface of the belt wheel; two internal thread holes are formed in the belt wheel in a penetrating mode, the axes of the two internal thread holes are parallel to the axis of the center hole, and the two internal thread holes are arranged in a central symmetry mode through the axis of the center hole.

Further perfecting the technical scheme, the end face of the belt wheel is provided with a weight reduction ring groove coaxial with the central hole, the bottom wall of the weight reduction ring groove is provided with two convex parts, and the two internal thread holes are arranged on the two convex parts in a one-to-one manner.

Further, the boss is flush with the end face of the pulley; in the radial direction of the belt wheel, the convex part is connected with the inner wall of one side of the weight reduction ring groove, which is close to the wheel teeth.

The utility model also relates to a belt pulley dismounting structure which comprises a motor and the belt pulley, wherein the connecting end of the rotating shaft of the motor extends out of the motor; the outer circumferential wall of the connecting end is respectively provided with a key groove on the inner wall of the belt wheel center hole and is connected with the inner wall of the belt wheel center hole through an adaptive key, and the key groove on the inner wall of the belt wheel center hole axially penetrates through the belt wheel; a disassembly backing plate is arranged on the outer side of the connecting end along the axial direction of the rotating shaft and is perpendicular to the rotating shaft; a support column is clamped between the disassembly backing plate and the end face of the connecting end so that a certain disassembly distance is reserved between the disassembly backing plate and the adjacent end face of the belt wheel; the dismounting backing plate is provided with two through holes corresponding to the two internal thread holes, the two dismounting bolts penetrate the two through holes one to one and are in threaded connection with the corresponding internal thread holes, the head portion of the dismounting bolt is abutted to the surface, deviating from the belt wheel, of the dismounting backing plate, so that the belt wheel is driven to be separated from the rotating shaft along the axial direction by synchronously screwing the two dismounting bolts.

Further, the distance between the belt wheel and the disassembling cushion plate is not less than the matching length of the central hole of the belt wheel and the connecting end.

Further, extend on the terminal surface of link and be equipped with the external screw thread shaft part that is used for connecting band pulley gland nut, through the external screw thread shaft part forms to support column, external screw thread shaft part and pivot structure as an organic whole, the external diameter of external screw thread shaft part is less than the diameter of link.

Compared with the prior art, the utility model has the following beneficial effects:

according to the belt wheel, the spoke is provided with two symmetrical internal thread holes in a penetrating manner, the belt wheel is sleeved on a rotating shaft of a motor, and a key connection is arranged between the central hole and the connecting end so as to ensure the reliability of synchronous rotation; need dismantle the belt pulley, lift off the axial locating part after, when the band pulley can't directly slide from the pivot and lift off, just can regard as dismantling the structure basis with the external screw thread shaft section of pivot outer end and dismantlement backing plate, pass through the through-hole on the dismantlement backing plate and with the internal thread hole threaded connection who corresponds through two dismantlement bolts one to one, screw in earlier and dismantle bolt to its head butt in the one side that deviates from the band pulley in dismantling the backing plate, then, two dismantlement bolts of further synchronous revolution (to the direction of screwing), transmit the band pulley for power equilibrium, so that the band pulley is deviate from in the pivot of motor along the axial, when not damaging band pulley and motor housing, just can accomplish the dismantlement of band pulley, time saving and labor saving.

Drawings

FIG. 1 is a schematic structural view of a pulley dismounting structure according to an embodiment;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a perspective cross-sectional view A-A of FIG. 2;

the motor 1, the belt wheel 2, the rotating shaft 3, the protruding portion 4, the dismounting bolt 5, the dismounting backing plate 6 and the external thread shaft section 7.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Referring to fig. 1, 2 and 3, a pulley dismounting structure of a specific embodiment includes a pulley 2, wherein gear teeth are uniformly distributed on an outer circumferential surface of the pulley 2 in a circumferential direction, a central hole for connecting with a rotating shaft of a driving mechanism is formed in the middle of the pulley 2, the central hole penetrates through the pulley 2, and the central hole is coaxial with the outer circumferential surface of the pulley 2; two internal thread holes are formed in the belt wheel 2 in a penetrating mode, the axes of the two internal thread holes are parallel to the axis of the center hole, and the two internal thread holes are arranged in a central symmetry mode through the axis of the center hole. The belt wheel 2 is sleeved on the connecting end through a central hole, and the belt wheel 2 is adjacent to the end surface of the shell of the motor 1; the outer circumferential wall of the connecting end and the inner wall of the belt wheel center hole are respectively provided with a key groove and are connected through an adaptive key so as to ensure synchronous rotation, and the key groove arranged on the inner wall of the belt wheel center hole axially penetrates through the belt wheel 2; a dismounting backing plate 6 is arranged on the outer side of the connecting end along the axial direction of the rotating shaft 3, and the dismounting backing plate 6 is perpendicular to the rotating shaft 3; a support column is arranged between the disassembly backing plate 6 and the end face of the connecting end in a clamping mode so that a certain disassembly distance is reserved between the disassembly backing plate 6 and the adjacent end face of the belt wheel; the two through holes corresponding to the two internal thread holes are formed in the dismounting backing plate 6, the two dismounting bolts 5 penetrate through the two through holes in a one-to-one mode and are in threaded connection with the corresponding internal thread holes, the head portions of the dismounting bolts 5 are abutted to the surface, deviating from the belt wheel 2, of the dismounting backing plate 6, and therefore the belt wheel 2 is driven to be separated from the rotating shaft 3 along the axial direction through the two dismounting bolts 5 which rotate synchronously (in the screwing direction).

The structure is dismantled to band pulley of embodiment, during actual operation, dismantles backing plate 6 and is in the stationary state, rotates two simultaneously and dismantles bolt 5, and the head of dismantling bolt 5 offsets tightly with dismantling backing plate 6, and dismantlement bolt 5 can neither follow axial upward movement nor downstream. At this time, the torsion applied to the detaching bolt 5 is transmitted to the pulley 2 through the detaching bolt 5 and the internal threaded hole, so that the pulley 2 is uniformly and slowly released along the axial direction of the rotating shaft 3. Like this, only need to rotate two and dismantle bolt 5 and can dismantle band pulley 2, compare in the use tool with band pulley 2 along the axial of pivot 3 and pry out, the former more labour saving and time saving just can not damage the shell of band pulley 2 and motor 1.

During implementation, the supporting column can be used as an independent part, can be integrally formed with the detachable base plate 6, can be integrally formed with the rotating shaft 3, and can be selected according to specific application scenes; in this embodiment, when the motor was used normally, band pulley 2 was pressed firmly on the shaft shoulder of pivot 3 through band pulley gland nut, so, extended on the terminal surface of the link of pivot 3 and be equipped with the external screw thread shaft segment 7 that is used for connecting band pulley gland nut, formed through external screw thread shaft segment 7 to the support column, external screw thread shaft segment 7 and pivot 3 structure as an organic whole, the external diameter of external screw thread shaft segment 7 is less than the diameter of link. The dismounting backing plate 6 and the rotating shaft 3 are of a split structure.

Please refer to fig. 1, wherein a weight-reducing ring groove coaxial with the central hole is concavely formed on the end surface of the belt pulley 2, two protrusions 4 are arranged on the bottom wall of the weight-reducing ring groove, and the two internal threaded holes are one-to-one opened on the two protrusions 4. The convex part 4 is flush with the end surface of the belt wheel 2; in the radial direction of the belt wheel 2, the convex part 4 is connected with the inner wall of one side of the weight-reducing ring groove close to the wheel teeth. The lightening ring grooves and the protrusions 4 face the dismounting shim plate 6.

Like this, through set up on the terminal surface (spoke) of band pulley 2 and subtract heavy annular, just can alleviate the weight of whole band pulley 2, further set up two bellying 4 on the diapire that subtracts heavy annular, can also guarantee the effective length of female screw hole department threaded connection when accomplishing to subtract heavy to make the normal use that does not influence this band pulley's dismantlement structure, save material cost. Wherein, the protruding part 4 is connected with the inner wall of one side of the weight reduction ring groove close to the wheel teeth, so that the strength of the belt wheel 2 is ensured. In this embodiment, the other end surface of the pulley 2 is also symmetrically provided with weight-reducing ring grooves (without the protrusions).

Referring to fig. 3, the distance between the pulley 2 and the dismounting pad 6 is preferably not less than the matching length of the central hole of the pulley 2 and the connecting end.

Therefore, enough disassembly distance can be ensured, the belt wheel 2 can be completely separated from the rotating shaft 3 of the motor by synchronously rotating the two disassembly bolts 5, and other additional disassembly steps are not needed.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. The outer circumferential surface of the belt wheel is provided with gear teeth which are uniformly distributed in the circumferential direction, the middle part of the belt wheel is provided with a central hole which is used for being connected with a rotating shaft of a driving mechanism, the central hole penetrates through the belt wheel, and the central hole is coaxial with the outer circumferential surface of the belt wheel; the method is characterized in that: two internal thread holes are formed in the belt wheel in a penetrating mode, the axes of the two internal thread holes are parallel to the axis of the center hole, and the two internal thread holes are arranged in a central symmetry mode through the axis of the center hole.

2. A pulley according to claim 1, characterized in that: the end face of the belt wheel is provided with a weight reduction ring groove coaxial with the central hole, the bottom wall of the weight reduction ring groove is provided with two convex parts, and the two internal thread holes are arranged on the two convex parts in a one-to-one mode.

3. A pulley according to claim 2, wherein: the convex part is flush with the end surface of the belt wheel; in the radial direction of the belt wheel, the convex part is connected with the inner wall of one side of the weight reduction ring groove, which is close to the wheel teeth.

4. The utility model provides a structure is dismantled to band pulley, includes the motor, and the link of the pivot of motor extends outside the motor, its characterized in that: further comprising a pulley as claimed in any one of claims 1 to 3, the pulley being mounted on said connecting end through a central bore; the outer circumferential wall of the connecting end is respectively provided with a key groove on the inner wall of the belt wheel center hole and is connected with the inner wall of the belt wheel center hole through an adaptive key, and the key groove on the inner wall of the belt wheel center hole axially penetrates through the belt wheel;

a disassembly backing plate is arranged on the outer side of the connecting end along the axial direction of the rotating shaft and is perpendicular to the rotating shaft;

a support column is clamped between the disassembly backing plate and the end face of the connecting end so that a certain disassembly distance is reserved between the disassembly backing plate and the adjacent end face of the belt wheel;

the dismounting backing plate is provided with two through holes corresponding to the two internal thread holes, the two dismounting bolts penetrate the two through holes one to one and are in threaded connection with the corresponding internal thread holes, the head portion of the dismounting bolt is abutted to the surface, deviating from the belt wheel, of the dismounting backing plate, so that the belt wheel is driven to be separated from the rotating shaft along the axial direction by synchronously screwing the two dismounting bolts.

5. The pulley dismounting structure according to claim 4, wherein: the distance between the belt wheel and the dismounting backing plate is not less than the matching length of the central hole of the belt wheel and the connecting end.

6. The pulley dismounting structure according to claim 4, wherein: the outer thread shaft section that is used for connecting band pulley gland nut extends on the terminal surface of link, through outer thread shaft section forms into support column, outer thread shaft section and pivot structure as an organic whole, the external diameter of outer thread shaft section is less than the diameter of link.