CN213055182U - Guide wheel frame assembly and jig saw - Google Patents
Guide wheel frame assembly and jig saw Download PDFInfo
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- CN213055182U CN213055182U CN202021271667.2U CN202021271667U CN213055182U CN 213055182 U CN213055182 U CN 213055182U CN 202021271667 U CN202021271667 U CN 202021271667U CN 213055182 U CN213055182 U CN 213055182U
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- guide wheel
- pin
- frame assembly
- idler
- wheel frame
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Abstract
The application provides a guide wheel frame assembly and jig saw, guide wheel frame assembly includes guide wheel frame body, pin and guide pulley. The guide wheel frame comprises a guide wheel frame body, wherein mounting holes are formed in two sides of one end of the guide wheel frame body, the guide wheel is arranged between the two mounting holes, and the pin penetrates through the two mounting holes and a central hole of the guide wheel so as to fix the guide wheel on the guide wheel frame body. And a lubricating structure is arranged between the guide wheel and the pin, and lubricating oil is stored in the lubricating structure. The lubricating structure is arranged between the guide wheel and the pin, so that the grease storage space is increased, lubricating oil is stored in the lubricating structure, the lubricating oil plays a lubricating role in the friction process, the guide wheel and the pin are prevented from being quickly abraded due to dry friction, and the service life of the guide wheel frame assembly is prolonged. Simultaneously, the cutting stability of the jig saw adopting the guide wheel frame assembly.
Description
Technical Field
The invention relates to the technical field of electric tools, in particular to a guide wheel frame assembly and a jig saw.
Background
The jig saw is a common tool in the wood processing process, and is an indispensable special tool particularly when a special-shaped component is processed in the decoration industry, so that the jig saw is widely used for curve cutting of special-shaped construction of wood, plastics and the like.
As shown in fig. 1-2, the blade support mechanism of the curve saw in the market is a wheel frame assembly 2, and the wheel frame assembly 2 is mostly composed of a wheel frame body 21, a pin 23, a guide wheel 22 and a clamp spring 24. The idler 22 is loosely fitted to the pin 23 (the idler can easily rotate about the axis of the pin 23). The pin 22 is matched with two holes at one end of the guide wheel frame body 21 in a loose fit mode and a tight fit mode, and the pin 23 is limited to move along the axial direction through two clamp springs 24. The guide wheel 22 is used to support the saw blade 1 so that the saw blade 1 can move up and down smoothly and swing back and forth slightly when cutting an object. Therefore, when the jig saw cuts the object 3 to be cut, the load is transmitted from the saw blade 1 to the guide wheel 22 (the two are rolling friction, the friction force is smaller than the friction force generated by sliding friction), the guide wheel 22 transmits the load to the pin 23, the three are rubbed and heated, and then gradually wear each other until the guide wheel frame assembly 2 loses the capability of supporting the saw blade 1. The saw blade 1 and the guide wheel 22 are arranged outside, so that the abrasion of the saw blade 1 and the guide wheel 22 can be reduced by adding lubricating grease during actual use, and the service life is prolonged. However, because there is only a very small gap between the inner ring of the guide wheel 22 and the outer ring of the pin 23 (from the perspective of rotational motion, the smaller the gap, the more stable the rotation), the space for adding lubricating oil is lost between the inner ring of the guide wheel 22 and the outer ring of the pin 23, and the dry friction phenomenon is an important factor for the quick wear of the two, and the structure not only affects the stability of the jigsaw, but also reduces the service life thereof.
Disclosure of Invention
The invention aims to provide a guide wheel frame assembly to solve the technical problem of lubrication between a guide wheel and a pin in the conventional guide wheel frame assembly.
In order to achieve the above object, the present application provides a wheel carrier assembly, including a wheel carrier body, a pin, and a guide wheel; mounting holes are formed in two sides of one end of the guide wheel frame body, the guide wheel is arranged between the two mounting holes, and the pin penetrates through the two mounting holes and the center hole of the guide wheel so as to fix the guide wheel on the guide wheel frame body; and a lubricating structure is arranged between the guide wheel and the pin, and lubricating oil is stored in the lubricating structure.
Optionally, in the guide wheel frame assembly, the guide wheel frame assembly further comprises a needle bearing, and the needle bearing is in interference fit with a central hole of the guide wheel; the pin is in clearance fit with a bearing hole of the needle bearing to form the lubricating structure.
Optionally, in the idler frame assembly, the idler frame assembly further comprises a needle bearing, the needle bearing being clearance fitted with the central bore of the idler to form the lubricating structure.
Optionally, in the idler frame assembly, the needle bearing is clearance fitted with the central bore of the idler and forms a clearance in which lubricating oil is stored.
Optionally, in the guide wheel frame assembly, retainers are arranged at two ends of the needle bearing, and the retainers and the inner wall of the guide wheel form a closed space.
Optionally, in the idler frame assembly, an oil storage groove is formed on the pin, and an opening of the oil storage groove faces to be close to the idler to form the lubricating structure.
Optionally, in the idler frame assembly, the oil reservoir extends from one end of the pin to the other end and is helical.
Optionally, in the guide frame assembly, the guide frame assembly further includes clamp springs provided at both ends of the pin to limit a degree of freedom of the pin in an axial direction thereof.
Optionally, in the idler frame assembly, one end of the pin is provided with a clamping groove, the clamping groove is clamped with one of the mounting holes, the other end of the pin is provided with a knurl, and the knurl is matched with the other mounting hole to limit the degree of freedom of the pin in the axial direction.
In another aspect, the present application further provides a jigsaw comprising a saw blade, a motor, and the idler frame assembly; the motor is connected with the guide wheel to drive the guide wheel to move, and the guide wheel is connected with the saw blade.
Compared with the prior art, the guide wheel frame assembly that this application provided, through the guide wheel with be provided with lubricating structure between the pin, increased the space that the grease was stored like this lubricating structure is stored and is had lubricating oil, and lubricating oil has played lubricated effect at the in-process of friction like this, has avoided dry friction to lead to the guide wheel with the pin rapid wear has improved guide wheel frame assembly's life. Meanwhile, the cutting stability of the jig saw adopting the guide wheel frame assembly is also improved.
Drawings
FIG. 1 is a schematic diagram of a prior art curved saw;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic illustration of a structure of an idler frame assembly provided in an embodiment of the present application;
FIG. 4 is a cross-sectional view of an idler frame assembly provided in an embodiment of the present application;
FIG. 5 is a schematic illustration of a structure of an idler assembly provided in another embodiment of the present application;
fig. 6 is a schematic structural view of a pin provided in an embodiment of the present application.
Wherein the reference numerals of figures 1-2 are as follows:
1-saw blade; 2-a idler frame assembly; 21-a guide wheel frame body; 22-a guide wheel; 23-a pin; 24-a clamp spring; 3-the material to be cleaved.
The reference numerals of figures 3 to 6 are as follows:
10-a idler frame assembly; 11-a guide wheel frame body; 12-a guide wheel; 13-a pin; 13 a-card slot; 13 b-knurling; 14-needle bearings; 14 a-needle roller; 14 b-a cage; 15-a clamp spring; 16-an oil storage tank; 20-lubricating oil.
Detailed Description
In order to make the objects, advantages and features of the present invention more clear, the following describes the wheel frame assembly and the jigsaw in detail with reference to fig. 3-6. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
As used in this specification, the singular forms "a", "an" and "the" include plural referents, and the plural forms "a plurality" includes more than two referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally connected. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 3, a schematic diagram of a idler frame assembly 10 provided in an embodiment of the present application is shown. The application provides a guide wheel frame assembly 10, wherein the guide wheel frame assembly 10 comprises a guide wheel frame body 11, a pin 13 and a guide wheel 12; mounting holes are formed in two sides of one end of the guide wheel frame body 11, the guide wheel 12 is arranged between the two mounting holes, and the pin 13 penetrates through the two mounting holes and a central hole of the guide wheel 12 so as to fix the guide wheel 12 on the guide wheel frame body 11; a lubricating structure is arranged between the guide wheel 12 and the pin 13, and lubricating oil 20 is stored in the lubricating structure.
By arranging the lubricating structure between the guide wheel 12 and the pin 13, the grease storage space is increased, and the lubricating oil 20 is stored in the lubricating structure, so that the lubricating oil 20 plays a lubricating role in the friction process, the guide wheel 12 and the pin 13 are prevented from being quickly worn due to dry friction, and the service life of the guide wheel frame assembly 10 is prolonged.
Referring to fig. 4 in conjunction with fig. 3, the idler frame assembly 10 further includes a needle bearing 14. Specifically, the needle bearing 14 has a bearing hole in the center, and a plurality of needles 14a are uniformly distributed on the outer surface of the needle bearing, and all the needles 14a are located on the same circumference. The needle bearing 14 is in interference fit with a central hole of the guide wheel 12; the pin 13 is clearance-fitted to the bearing bore of the needle bearing 14 to form the lubricating structure. In this way, there is no relative friction between the runner 12 and the needle bearing 14, so that during cutting, the load is transmitted from the saw blade to the runner 12, and the runner 12 transfers the load to the pin 13 via the needle bearing 14. Due to the clearance fit of the pin 13 with the bearing hole of the needle bearing 14, there is relative sliding between the needle bearing 14 and the pin 13, generating friction, but the clearance between the pin 13 and the needle bearing 14 constitutes the lubrication structure. And lubricating oil 20 is added into the lubricating structure, namely lubricating oil 20 is added between the pin 13 and the needle roller bearing 14, so that the lubricating oil 20 plays a role of lubricating in the friction process, the rapid abrasion of the needle roller bearing 14 and the pin 13 caused by dry friction is avoided, and the service life of the guide wheel frame assembly 10 is prolonged.
In another embodiment, the needle roller bearing 14 and the central hole of the guide wheel 12 may also be in clearance fit to form the lubricating structure, after the lubricating oil 20 is added into the lubricating structure, the lubricating oil 20 plays a role in lubricating during friction, so that rapid wear between the needle roller bearing 14 and the guide wheel 12 caused by dry friction is avoided, and the service life of the guide wheel frame assembly 10 is prolonged. Further, since the needle bearing 14 is in clearance fit with the center hole of the guide wheel 12, the needle bearing 14 can have a certain movement space in the center hole of the guide wheel 12, and before the pin 13 passes through the bearing hole of the needle bearing 14 and fixes the guide wheel 12 to one end of the guide wheel frame body 11, the needle bearing 14 can be easily removed from the center hole of the guide wheel 12, thereby facilitating the installation and removal thereof.
In this embodiment, it is preferable that the needle roller bearings 14 are provided with retainers 14b at both ends, and the retainers 14b form a closed space with the inner wall of the guide pulley 12. The lubricating oil 20 in the lubricating structure can be prevented from flowing out from the two openings of the center hole of the stator 12, thus avoiding the trouble of frequently adding the lubricating oil 20 and avoiding the abrasion of the stator 12 and the needle bearing 14 caused by the absence of the lubricating oil 20 in the lubricating structure.
The needle roller bearing 14 is clearance-fitted to the center hole of the stator 12 and forms a clearance in which lubricating oil 20 is stored. In this way, the needle bearing 14 and the pin 13 can be lubricated to avoid wear and improve the service life of the guide wheel frame assembly 10.
Referring to fig. 5-6, in another embodiment, an oil reservoir 16 is provided on the pin 13, and the oil reservoir 16 is opened to be close to the guide roller 12 to form the lubricating structure. Therefore, when only a small gap is left between the guide wheel 12 and the pin 13 for smooth rotation and no space for adding the lubricating oil 20 is provided, the oil storage groove 16 provides a space for storing oil, so that the lubricating effect can be achieved in the friction process while the transmission smoothness is not influenced, and the guide wheel 12 and the pin 13 are prevented from being rapidly worn due to dry friction.
The oil storage groove 16 may be a plurality of grooves arranged at intervals from one end to the other end of the pin 13, and the shape of the groove may be circular or square, and the shape of the oil storage groove 16 is not limited herein. Preferably, the oil reservoir 16 extends from one end of the pin 13 to the other end and is helical, so that the oil reservoir 16 is continuous over the pin 13, i.e. the lubricating structure is continuous, which further facilitates the lubrication between the pin 13 and the idler wheel 12.
Wherein, when the oil storage tank 16 is spiral, the width of the spiral groove is 0.25mm-0.75mm, preferably 0.5mm, the depth of the spiral groove is 0.1mm-0.5mm, preferably 0.3mm, the pitch of the spiral groove is 2.0mm-3.0mm, preferably 2.5 mm.
Wherein the idler frame assembly 10 further comprises snap springs 15, the snap springs 15 being arranged at both ends of the pin 13 to limit the degree of freedom of the pin 13 in the axial direction thereof.
With continued reference to fig. 6, it is preferable that one end of the pin 13 is provided with a locking groove 13a, the locking groove 13a is locked with one of the mounting holes, the other end of the pin 13 is provided with a knurl 13b, and the knurl 13b is matched with the other mounting hole to limit the degree of freedom of the pin 13 in the axial direction thereof.
In another aspect, the present application further provides a jigsaw comprising a saw blade, a motor, and the idler frame assembly; the motor is connected with the guide wheel to drive the guide wheel to move, and the guide wheel is connected with the saw blade.
The lubricating structure is arranged between the guide wheel and the pin, so that the grease storage space is increased, lubricating oil is stored in the lubricating structure, the lubricating oil plays a lubricating role in the friction process, the guide wheel and the pin are prevented from being quickly abraded due to dry friction, and the service life of the guide wheel frame assembly is prolonged. Meanwhile, the jig saw adopts the guide wheel frame assembly, so that the cutting stability of the jig saw is improved.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (10)
1. A guide wheel frame assembly is characterized by comprising a guide wheel frame body, a pin and a guide wheel; mounting holes are formed in two sides of one end of the guide wheel frame body, the guide wheel is arranged between the two mounting holes, and the pin penetrates through the two mounting holes and the center hole of the guide wheel so as to fix the guide wheel on the guide wheel frame body; and a lubricating structure is arranged between the guide wheel and the pin, and lubricating oil is stored in the lubricating structure.
2. The idler frame assembly of claim 1, wherein the idler frame assembly further comprises a needle bearing in interference fit with a central bore of the idler; the pin is in clearance fit with a bearing hole of the needle bearing to form the lubricating structure.
3. The idler frame assembly of claim 1, further comprising a needle bearing that is clearance fit with a central bore of the idler to form the lubrication feature.
4. The idler assembly of claim 3, wherein the needle bearing is clearance fit with the center bore of the idler and forms a clearance, the clearance having lubricant stored therein.
5. The idler assembly of claim 3 wherein said needle bearings are provided with retainers at each end and said retainers form a closed space with the inner wall of said idler.
6. The idler frame assembly of claim 1 wherein said pin has an oil reservoir therein, said oil reservoir opening to said idler for forming said lubricating structure.
7. The wheel carriage assembly of claim 6 wherein said oil reservoir extends from one end of said pin to the other end and is helical.
8. The idler frame assembly of claim 1, further comprising snap springs disposed at both ends of the pin to limit the freedom of the pin in its axial direction.
9. The wheel frame assembly of claim 1, wherein said pin has a slot at one end for engaging one of said mounting holes and a knurl at the other end for engaging the other of said mounting holes to limit the degree of freedom of said pin in the axial direction thereof.
10. A jigsaw comprising a saw blade, a motor, and the idler frame assembly of any one of claims 1-9; the motor is connected with the guide wheel to drive the guide wheel to move, and the guide wheel is connected with the saw blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021271667.2U CN213055182U (en) | 2020-07-03 | 2020-07-03 | Guide wheel frame assembly and jig saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021271667.2U CN213055182U (en) | 2020-07-03 | 2020-07-03 | Guide wheel frame assembly and jig saw |
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| Publication Number | Publication Date |
|---|---|
| CN213055182U true CN213055182U (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021271667.2U Active CN213055182U (en) | 2020-07-03 | 2020-07-03 | Guide wheel frame assembly and jig saw |
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| CN (1) | CN213055182U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115716288A (en) * | 2022-11-21 | 2023-02-28 | 常州机电职业技术学院 | Mechanical automatic cutting equipment |
-
2020
- 2020-07-03 CN CN202021271667.2U patent/CN213055182U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115716288A (en) * | 2022-11-21 | 2023-02-28 | 常州机电职业技术学院 | Mechanical automatic cutting equipment |
| CN115716288B (en) * | 2022-11-21 | 2023-09-26 | 常州机电职业技术学院 | Mechanical automatic cutting equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhejiang Crown Electric Tools Manufacture Co.,Ltd. Assignor: ZHEJIANG HENGTAI CROWN GARDEN TOOLS CO.,LTD. Contract record no.: X2023980040601 Denomination of utility model: A guide wheel frame component and a curve saw Granted publication date: 20210427 License type: Common License Record date: 20230828 |
|
| EE01 | Entry into force of recordation of patent licensing contract |