CN215293312U - Novel split type taper key sleeve belt pulley - Google Patents
Novel split type taper key sleeve belt pulley Download PDFInfo
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- CN215293312U CN215293312U CN202121429525.9U CN202121429525U CN215293312U CN 215293312 U CN215293312 U CN 215293312U CN 202121429525 U CN202121429525 U CN 202121429525U CN 215293312 U CN215293312 U CN 215293312U
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Abstract
The utility model relates to a novel split type awl key sleeve belt pulley, include: the belt pulley, the taper key sleeve and the fixing bolt; the taper key sleeve is provided with an inner hole and an inner key groove and is arranged on the transmission shaft through the inner hole and the inner key groove; the size of the outer surface of the taper key sleeve is gradually reduced from a large end to a small end, a sleeve step is arranged at the large end of the outer surface of the taper key sleeve, and a plurality of penetrating screw holes are formed in the sleeve step; the taper key sleeve is provided with a taper key sleeve opening; the inner hole of the belt pulley is provided with a boss matched with the step to be sleeved, and the boss is provided with a bolt hole corresponding to the screw hole on the step to be sleeved; the fixing bolt penetrates through a screw hole on the step of the sleeve and a bolt hole on the boss to fix the taper key sleeve and the belt pulley. The utility model has the advantages that: the belt pulley is connected with the transmission shaft through the split type taper key sleeve, so that the belt pulley can be conveniently mounted and dismounted, the exchange of belt pulleys with different specifications in a certain size can be realized, and the requirement on the machining precision of parts is low.
Description
Technical Field
The utility model relates to a belt pulley and transmission shaft connection structure technical field particularly, relate to a novel split type awl key cover belt pulley.
Background
The belt pulley is an important component of the existing power transmission system, a torque key is wedged between the belt pulley and the transmission shaft by using a key groove on the transmission shaft and a key groove in an inner hole of the belt pulley after the belt pulley and the transmission shaft are tightly embedded, the belt pulley and the transmission shaft are kept to synchronously rotate by using the shearing resistance of the torque key, the transmission and the reception of torque are realized by using a belt on the belt pulley, and the output rotating speed can be adjusted by changing the size of the belt pulley.
The existing belt pulley and the transmission shaft are tightly embedded through a straight shaft and are matched according to the standard established by the state, the transmission shaft with one specification can only be matched with the belt pulley with the same specification, and the belt pulley and the transmission shaft are tightly matched, so that the requirement on the precision of the matched size of the belt pulley is relatively high, the difficulty in installation and disassembly is high, and the belt pulley and a transmission system are extremely easy to damage.
SUMMERY OF THE UTILITY MODEL
To the weak point that exists in the above-mentioned problem, the utility model provides a but split body installation, components of a whole that can function independently are dismantled and removable novel split type awl key sleeve belt pulley of belt pulley.
In order to achieve the above object, the utility model provides a novel split type awl key cover belt pulley, include: the belt pulley is sleeved outside the conical key sleeve, and the fixing bolt is used for fixing the belt pulley and the conical key sleeve;
one end of the outer surface of the taper key sleeve is a large end, the other end of the outer surface of the taper key sleeve is a small end, the size of the outer surface of the taper key sleeve is gradually reduced from the large end to the small end, a sleeve step is arranged at the large end of the outer surface of the taper key sleeve, and a plurality of penetrating screw holes are formed in the sleeve step; the conical key sleeve is provided with a conical key sleeve opening which penetrates through the outer surface and the inner hole of the conical key sleeve along the axial direction of the conical key sleeve; the taper key sleeve is provided with an inner hole and is arranged on the transmission shaft through the inner hole;
the size and the shape of an inner hole of the belt pulley are matched with the size and the shape of the outer surface of the conical key sleeve, a boss matched with the step of the current sleeve is arranged on the inner hole of the belt pulley, and a bolt hole corresponding to a screw hole in the step of the current sleeve is arranged on the boss; a belt groove is formed in the outer surface of the belt pulley;
the fixing bolt penetrates through the screw hole in the step and the bolt hole in the boss, and the taper key sleeve and the belt pulley are fixed.
As a further improvement of the utility model, the outer surface of the taper key sleeve is a conical surface.
As a further improvement, the taper of the outer surface of the taper key sleeve is 1: 14.
as a further improvement of the present invention, the taper key sleeve opening and the internal key groove are disposed at opposite positions.
As a further improvement, the opening width of the conical key sleeve opening is not more than 5 mm.
As a further improvement, the screw holes are 6 to 8 in the cross section of the step.
As a further improvement, the 6 to 8 screw holes are uniformly arranged along the circumferential direction.
As the utility model discloses further improve, the screw hole is M12's screw hole, the aperture of bolt hole is 13 mm.
As a further improvement, the outer surface of the conical key sleeve is provided with a conical key sleeve notch, and the inner hole of the belt pulley is provided with a key matched with the conical key sleeve notch.
As a further improvement of the present invention, the taper key sleeve notch and the taper key sleeve opening are disposed at opposite positions.
The utility model has the advantages that: the belt pulley is connected with the transmission shaft through the split type taper key sleeve, so that the belt pulley can be conveniently mounted and dismounted, the exchange of belt pulleys with different specifications in a certain size can be realized, and the requirement on the processing precision of parts is low; and the damage to the components in the disassembly process can be reduced, and the working strength and the potential safety hazard of an operator in the operation process can be reduced.
Drawings
FIG. 1 is a schematic sectional view of a novel split-type taper key sleeve belt pulley of the present invention;
fig. 2 is a schematic cross-sectional view of the structure of the novel split-type taper key sleeve belt pulley of the present invention.
In the figure: 1. a belt pulley; 2. a taper key sleeve; 3. fixing the bolt; 4. a screw hole; 5. a conical key sleeve opening; 6. an internal keyway; 7. a taper key sleeve notch; 8. when the step is sleeved; 9. and (4) a boss.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention. The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
It should be noted that the directions or positional relationships indicated by "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. used in the present invention are only for convenience of description and simplification of description based on the directions or positional relationships shown in the drawings, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment of the utility model provides a novel split type awl key cover belt pulley, as shown in fig. 1-2, including belt pulley 1, awl key cover 2 and fixing bolt 3. The taper key sleeve 2 is arranged between the belt pulley 1 and the transmission shaft and used for fixing the belt pulley 1 and the transmission shaft. Be equipped with hole and inside keyway 6 on the awl key sleeve 2, the size of hole and the size phase-match of transmission shaft, inside keyway 6 and the epaxial keyway of transmission are mutually supported, and awl key sleeve 2 is installed on the transmission shaft through hole and inside keyway 6, and after the installation was emboliaed the transmission shaft and was aligned the inside keyway 6 of awl key sleeve 2 and the epaxial keyway of transmission with awl key sleeve 2, built into the keyway of alignment with suitable moment of torsion.
One end of the outer surface of the taper key sleeve 2 is a large end, the other end of the outer surface of the taper key sleeve 2 is a small end, the size of the outer surface of the taper key sleeve 2 is gradually reduced from the large end to the small end, and the cross section of the outer surface of the taper key sleeve 2 can be polygonal (such as rectangular, pentagonal, hexagonal or octagonal) or circular. When the sleeve step 8 protrudes from the outer surface of the taper key sleeve 2, the sectional shape of the sleeve step 8 can be the same as or different from that of the outer surface of the taper key sleeve 2, but is usually the same, when the sectional size of the sleeve step 8 is larger than that of the outer surface of the taper key sleeve 2, and when the sleeve step 8 is provided with a plurality of through screw holes 4;
the conical key sleeve 2 is provided with a conical key sleeve opening 5 which penetrates through the outer surface and the inner hole of the conical key sleeve 2 along the axial direction of the conical key sleeve 2, namely the conical key sleeve 2 is integrally cut into an opening, and the conical key sleeve opening 5 is used for tightening the inner hole of the conical key sleeve 2 under the action force of the fixing bolt 3, so that the inner hole of the conical key sleeve 2 is connected with the transmission shaft more tightly.
The size and the shape of the hole of belt pulley 1 and the size and the shape phase-match of the surface of awl key sleeve 2, 1 cover of belt pulley is established in the outside of awl key sleeve 2, the hole of belt pulley 1 be equipped with when set step 8 boss 9 of mutually supporting, the cone key sleeve 2 during installation work as set step 8 and belt pulley 2 boss 9 offset, be equipped with on the boss 9 and work as the corresponding bolt hole of screw hole on set step 8, the quantity of bolt hole is the same with the quantity of screw hole 4 when set step 8 on the boss 9, and the position is corresponding.
The outer surface of the belt pulley 1 is provided with a belt groove, and the belt groove can be correspondingly processed according to belts of different specifications. The number and the size of belt grooves on the belt pulley 1 can be designed and processed according to actual conditions, and the sizes of a plurality of belt grooves can be the same or different.
The fixing bolt 3 penetrates through a screw hole 4 on the sleeve step 8 and a bolt hole on the boss 9 to fix the taper key sleeve 2 and the belt pulley 1. The size of the fixing bolt 3 is selected according to the size of the screw hole 4 and the bolt hole. The inner surfaces of the screw hole 4 and the bolt hole can be provided with threads or not; or one is provided with threads and the other is not provided with threads, and the threads can be determined according to actual design and use requirements.
In an alternative embodiment, the outer surface of the taper key sleeve 2 is a conical surface, that is, the cross-sectional shape of the outer surface of the taper key sleeve 2 is circular, the conical surface of the taper key sleeve 2 has a certain taper, the large end of the taper key sleeve 2 is provided with a cylindrical sleeve step 8, and the diameter of the sleeve step 8 is larger than that of the large end of the taper key sleeve 2, so that the sleeve step 8 protrudes from the outer surface of the taper key sleeve 2. The outer surface of the taper key sleeve 2 is a conical surface, so that the taper key sleeve is convenient to process and can be easily matched with the belt pulley 1. Further, the taper of the outer surface of the taper key sleeve 2 is 1: 14, the inner hole of the corresponding belt pulley 1 is also tapered with a rate of 1: 14 is tapered. The taper of the taper key sleeve 2 and the taper of the belt pulley 1 is selected to be fourteen, which is the optimal matching ratio obtained by calculation, the taper can ensure the firm connection strength of the belt pulley 1 and the taper key sleeve 2, and can ensure that the belt pulley 1 can easily retreat from the taper key sleeve 2.
In an alternative embodiment, the taper key sleeve 2 is provided with a taper key sleeve opening 5 penetrating through the outer surface and the inner hole of the taper key sleeve along the axial direction thereof, and the taper key sleeve opening 5 and the inner key groove 6 are arranged at opposite positions, that is, in the diameter direction (section) of the taper key sleeve 2. The conical key sleeve opening 5 and the internal key groove 6 are arranged at opposite positions, so that when the conical key sleeve 2 is tightened, the connection between the inner hole of the conical key sleeve 2 and the transmission shaft is tighter, and the overall structural performance of the conical key sleeve 2 can be maintained. Further, the opening width of the taper key sleeve opening 5 is not more than 5mm, the opening width (gap width) of the taper key sleeve opening 5 is set to be 5mm at most, the connection of the inner hole of the taper key sleeve 2 and the transmission shaft is ensured to be tight while the overall structure performance of the taper key sleeve 2 is ensured, and meanwhile, the replacement of the belt pulley 1 within a certain size range can be realized.
In an alternative embodiment, when the cross section of the sleeve step 8 is provided with 6 to 8 screw holes 4, the axes of the screw holes 4 are parallel to the axis of the sleeve step 8, that is, the opening direction of the screw holes 4 is the same as the inner hole opening direction of the taper key sleeve 2. Correspondingly, 6 to 8 bolt holes are also formed in the boss of the belt pulley 1, and the opening direction of the bolt holes is consistent with the opening direction of the screw holes 4. 6 to 8 screw holes 4 on the cover step 8 correspond to 6 to 8 bolt holes on the boss 9 of the belt pulley 1 in position, so that the fixing bolt is conveniently connected and fixed in a penetrating way. Further, awl key sleeve 2 when 6 to 8 screw holes on cover step 8 evenly set up along the circumferencial direction, corresponding, 6 to 8 bolt holes on belt pulley 1's the boss 9 evenly set up along the circumferencial direction for the connection atress of awl key sleeve 2 and belt pulley 1 is more even, and belt pulley 1 can be better 2 transmission torque of cooperation awl key sleeve. Optionally, the screw hole 4 is an M12 screw hole, and the hole diameter of the bolt hole is 13 mm. The screw hole 4 on the awl key sleeve 2 can be inequality with the quantity of the bolt hole on the belt pulley 1, and the quantity of the bolt hole on the belt pulley can be more than to the quantity of the screw hole 4 on the awl key sleeve 2, and fixing bolt is not installed to the screw hole that exceeds, can conveniently push up belt pulley 1 from awl key sleeve 2 through unnecessary screw hole 4 when dismantling the belt pulley.
According to an optional implementation mode, the outer surface of the conical key sleeve 2 is provided with a conical key sleeve notch 7, a key matched with the conical key sleeve notch 7 is arranged on an inner hole of the belt pulley 1, and the conical key sleeve notch 7 of the conical key sleeve 2 and the shear resistance generated by the mutual matching of the key on the belt pulley 1 enable the belt pulley 1 and the conical key sleeve 2 not to move relatively, so that the friction loss between the belt pulley 1 and the conical key sleeve 2 can be reduced. Simultaneously with fixing bolt 3 combined action, improved the reliability and the stability of whole belt pulley.
Aiming at the existing belt pulley, the following are found in the practical use process:
the existing belt pulley and the transmission shaft are tightly embedded through a straight shaft, namely, are matched according to the standards set by the state, for example; 60. the numbers such as 65, 70, 75 and 80 represent the outer diameter of the transmission shaft and the diameter of the inner hole of the pulley, and each group of numbers represents the pulley and the transmission shaft of one specification, so that the numbers do not have interchangeability, and the transmission shaft of one specification can only be matched with the pulley of the same specification. And they are a very tight fit, almost zero to zero or even a negative fit, i.e., if the shaft diameter is 60 mm, then the pulley inner bore size is 60 mm minus 0 to 3 wires. The size fit is adopted to be completely the requirement of straight shaft fit, if a gap exists between the two, the belt pulley can be thrown away very easily in the high-speed rotating process, so that the belt pulley is very dangerous, meanwhile, the belt pulley and the transmission shaft can shake and generate friction in the rotating process, the inner hole of the belt pulley can be enlarged for a long time, the outer diameter of the transmission shaft can be reduced, the torque is built, and the key grooves of the two parties can be damaged under the ceaseless shaking impact, and once the transmission shaft and the key grooves of the transmission shaft are damaged, the repair is difficult. If the belt pulley and the transmission shaft are processed according to standard sizes and can be found to be very difficult to install through data sizes, the installation and the disassembly are very difficult to operate through years of use and on-site installation and disassembly, the belt pulley and the transmission system are extremely easy to damage, and great potential safety hazards are also accompanied in the installation and the disassembly process. Generally, the belt pulley is hammered on the transmission shaft little by little in the mode of swinging the sledge hammer when the belt pulley is installed, the belt pulley, the transmission shaft and a transmission system are extremely easy to damage or even discard in the process, the process can be completed only by tight fit of at least two persons, and safety accidents and serious damage of equipment can be caused when the belt pulley is slightly out of place in fit. And because the existing belt pulley and the transmission shaft are in close fit, the precision requirement of the fit size of the belt pulley is relatively high, the rejection rate is relatively high in the processing process, and the whole processing difficulty is high.
In addition, pulleys are a wear prone component during extended use, requiring replacement once worn or when parameter adjustments are required. Through long-time inseparable combination between belt pulley and the transmission shaft, in addition the change of temperature, the belt pulley will become very difficult to dismantle from the transmission shaft, the degree of difficulty of dismantlement can be more difficult than the installation, if equipment is in field work so because long-time wind blows and drenches, in addition corrosion, belt pulley dismantlement under this kind of state will be very difficult, brings huge working strength and potential safety hazard for an operator. The existing disassembling means is relatively single as the installation, and basically knocking is carried out in a sledge hammer mode or operating is carried out through a pulley extractor, but the two types of methods have various condition limitations and are difficult to normally exert, and equipment and a belt pulley can be damaged or even scrapped.
Through adopting the utility model discloses a novel split type awl key cover belt pulley of embodiment dismantles in-process easy operation, convenience at the installation, single alright completion whole operation process, need not with the help of large-scale appurtenance, intensity of labour also greatly reduced simultaneously. And the utility model discloses a novel split type awl key sleeve belt pulley compares in the processing of current belt pulley on the machining size precision, and the required precision is lower relatively to the processing degree of difficulty and the rejection rate also corresponding reduction not few. And the utility model discloses a novel split type awl key cover belt pulley can be processed into unified hole size with the belt pulley in the certain size within range, realizes the transmission system of different transmission shaft sizes through changing awl key cover 2, and general scope is wider.
The embodiment of the utility model provides an embodiment installation, the dismantlement process of novel split type awl key sleeve belt pulley can be:
when the conical key sleeve 2 is installed, the conical key sleeve 2 is sleeved into a transmission shaft, the inner key groove 6 of the conical key sleeve 2 is aligned with the key groove on the transmission shaft, and then proper torque is built into the aligned key groove. Then, the belt pulley 1 is slowly aligned with the taper key sleeve 2 (the big end of the inner hole of the belt pulley is punched towards the taper key sleeve), 6 bolt holes in the belt pulley 1 are aligned with 6 screw holes in the taper key sleeve 2, then the fixing bolts 3 penetrate from one side of the belt pulley 1 and are aligned with the screw holes 4 in the taper key sleeve 2 for tightening (firstly, the fixing bolts are tightened by hands), then the position of the split type belt pulley 1 on a transmission shaft is integrally adjusted, and after the fixing bolts are adjusted, six fixing bolts 3 are tightened by a wrench.
When the belt pulley is disassembled; firstly, completely detaching six fixing bolts 3, then taking two short M12 bolts, ejecting the belt pulley 1 from the conical key sleeve 2 by using two unused screw holes from one side of the conical key sleeve 2, then detaching the conical key sleeve 2 (at the moment, the conical key sleeve 2 can be easily detached due to losing the binding force), if only replacing the belt pulley 1, detaching the belt pulley 1 firstly, and then installing a new belt 1 wheel on the conical key sleeve 2.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a novel split type awl key sleeve belt pulley which characterized in that includes: the belt pulley is sleeved outside the conical key sleeve, and the fixing bolt is used for fixing the belt pulley and the conical key sleeve;
one end of the outer surface of the taper key sleeve is a large end, the other end of the outer surface of the taper key sleeve is a small end, the size of the outer surface of the taper key sleeve is gradually reduced from the large end to the small end, a sleeve step is arranged at the large end of the outer surface of the taper key sleeve, and a plurality of penetrating screw holes are formed in the sleeve step; the conical key sleeve is provided with a conical key sleeve opening which penetrates through the outer surface and the inner hole of the conical key sleeve along the axial direction of the conical key sleeve; the taper key sleeve is provided with an inner hole and is arranged on the transmission shaft through the inner hole;
the size and the shape of an inner hole of the belt pulley are matched with the size and the shape of the outer surface of the conical key sleeve, a boss matched with the step of the current sleeve is arranged on the inner hole of the belt pulley, and a bolt hole corresponding to a screw hole in the step of the current sleeve is arranged on the boss;
the fixing bolt penetrates through the screw hole in the step and the bolt hole in the boss, and the taper key sleeve and the belt pulley are fixed.
2. The novel split type taper key sleeve belt pulley according to claim 1, wherein the outer surface of the taper key sleeve is a conical surface.
3. The novel split type taper key sleeve belt pulley according to claim 2, wherein the taper of the outer surface of the taper key sleeve is 1: 14.
4. the novel split-type taper key sleeve belt pulley according to claim 1, wherein the taper key sleeve is provided with an internal key groove, and the taper key sleeve opening and the internal key groove are arranged at opposite positions.
5. The novel split type taper key sleeve belt pulley according to claim 1, wherein the opening width of the taper key sleeve opening is not more than 5 mm.
6. The novel split type taper key sleeve belt pulley according to claim 1, wherein 6 to 8 screw holes are formed on the cross section of the sleeve step.
7. The novel split type taper key sleeve belt pulley according to claim 6, wherein the 6 to 8 screw holes are uniformly arranged along the circumferential direction.
8. The novel split type taper key sleeve belt pulley according to claim 1, wherein the screw hole is M12 screw hole, and the hole diameter of the bolt hole is 13 mm.
9. The novel split type taper key sleeve belt pulley according to claim 1, wherein a taper key sleeve notch is formed in the outer surface of the taper key sleeve, and a key matched with the taper key sleeve notch is arranged on an inner hole of the belt pulley.
10. The novel split tapered key sleeve pulley according to claim 9, wherein the tapered key sleeve notch and the tapered key sleeve opening are disposed at opposite positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121429525.9U CN215293312U (en) | 2021-06-25 | 2021-06-25 | Novel split type taper key sleeve belt pulley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121429525.9U CN215293312U (en) | 2021-06-25 | 2021-06-25 | Novel split type taper key sleeve belt pulley |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215293312U true CN215293312U (en) | 2021-12-24 |
Family
ID=79518730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121429525.9U Active CN215293312U (en) | 2021-06-25 | 2021-06-25 | Novel split type taper key sleeve belt pulley |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215293312U (en) |
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2021
- 2021-06-25 CN CN202121429525.9U patent/CN215293312U/en active Active
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