CN211314905U - Wear-resistant ratchet pawl mechanism - Google Patents
Wear-resistant ratchet pawl mechanism Download PDFInfo
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- CN211314905U CN211314905U CN201921434319.XU CN201921434319U CN211314905U CN 211314905 U CN211314905 U CN 211314905U CN 201921434319 U CN201921434319 U CN 201921434319U CN 211314905 U CN211314905 U CN 211314905U
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- pawl
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- resistant
- groove
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- 239000011148 porous material Substances 0.000 claims description 2
- 230000033001 locomotion Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000003781 tooth socket Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a wear-resistant ratchet-pawl mechanism, which comprises a ratchet wheel, a ratchet wheel frame, a top post and a pawl, wherein the ratchet wheel is sleeved on the ratchet wheel frame; the pawl is hinged to the ratchet rack, a cylindrical hole channel is formed in the ratchet rack, the ejection column is supported and sleeved in the cylindrical hole channel through an elastic element, the ratchet is provided with ratchet internal teeth matched with the pawl, and the ejection column is abutted to the lower end of the pawl under the elastic force of the elastic element; the top end of the top column is hemispherical, a wear-resistant groove is arranged at the lower end of the pawl and at the contact position of the pawl and the top column, and the width of the wear-resistant groove is larger than the rotating radius of the top column. The utility model discloses become the contact of little excircle and big interior circle with planar contact below current fore-set upper end excircle and the pawl, reduced the contact stress of contact surface, improved the contact strength of pawl and fore-set, changed into the pure sliding motion of this department and used the roll to slide as the motion of assisting as leading, greatly improved the wearability of fore-set.
Description
Technical Field
The utility model relates to a ratchet pawl mechanism, in particular to wearability ratchet pawl mechanism.
Background
The ratchet-pawl mechanism is a transmission device for preventing reverse unidirectional transmission force or torque in machinery, such as chinese patent No. CN204985425U, and the utility model named as ratchet-pawl device for crane is a representative one. But the plane of the pawl is matched with the spherical surface of the ejection column, so that the stress is concentrated at the position, the ejection column is easy to wear, and the whole service life of the ratchet-pawl mechanism is greatly limited. Secondly, the parts of the device have no wear priority, so that the damage uncertainty of the parts is large, and the maintenance and the disassembly are inconvenient. And thirdly, the whole ratchet wheel needs to be replaced after the parts are worn, for example, the whole ratchet wheel needs to be replaced after the tooth socket teeth of the ratchet wheel are worn, so that the interchangeable parts are high in cost, the discarded parts are wasted, and the economy is poor. Therefore, there is a need for improvement of the prior art to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a wearability ratchet pawl mechanism realizes particularly through following technical scheme:
the utility model discloses a wear-resisting ratchet wheel and pawl mechanism, which comprises a ratchet wheel, a ratchet wheel frame, a top column and a pawl, wherein the ratchet wheel is sleeved on the ratchet wheel frame; the pawl is hinged to the ratchet rack, a cylindrical hole channel is formed in the ratchet rack, the ejection column is supported and sleeved in the cylindrical hole channel through an elastic element, the ratchet is provided with ratchet internal teeth matched with the pawl, and the ejection column is abutted to the lower end of the pawl under the elastic force of the elastic element; the top end of the top column is hemispherical, a wear-resistant groove is arranged at the lower end of the pawl and at the contact position of the pawl and the top column, and the width of the wear-resistant groove is larger than the rotating radius of the top column.
Furthermore, the wear-resisting groove is an annular groove or a cylindrical groove, and when the top pillar and the pawl move relatively, the hemispherical shape of the top pillar rolls in the wear-resisting groove.
Further, the pawl comprises a pawl base body hinged to the ratchet rack, a U-shaped groove is formed in the front end of the pawl base body, a detachable U-shaped wear-resistant block is arranged in the U-shaped groove, and the wear-resistant groove is formed in the lower end face of the U-shaped wear-resistant block.
Furthermore, a wear-resistant sliding sleeve is fixedly arranged in the cylindrical pore passage, and the jacking column can slide up and down in the wear-resistant sliding sleeve.
Further, the wear resistance of the wear-resistant sliding sleeve, the top column and the U-shaped wear-resistant block is reduced in sequence.
The utility model has the advantages that: the utility model discloses become the contact of sharp below current fore-set upper end excircle and the pawl contact of little excircle and big interior circle, reduced the contact stress of contact surface, improved the contact strength of pawl and fore-set, changed into the pure sliding motion of this department and used the roll to slide as the motion of assisting as leading, greatly improved the wearability of fore-set. Other advantageous effects of the present invention will be further described with reference to the following embodiments.
Drawings
The invention will be further described with reference to the following figures and examples:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the pawl structure;
FIG. 3 is a schematic diagram of the movement locus of the contact portion of the pawl and the top pillar in the prior art;
FIG. 4 is a schematic view of the movement locus of the contact part between the pawl and the support pillar;
Detailed Description
As shown in fig. 1: the utility model discloses a wear-resisting ratchet-pawl mechanism, which comprises a ratchet 1, a ratchet frame 2, a top post 5 and a pawl 3, wherein the ratchet 1 is sleeved on the ratchet frame 2; the pawl 3 is hinged to the ratchet rack 2, a cylindrical hole passage 4 is formed in the ratchet rack 2, the top column 5 is supported and sleeved in the cylindrical hole passage 4 through an elastic element 6, the ratchet 1 is provided with ratchet internal teeth matched with the pawl 3 for use, and the top column 5 is abutted to the lower end of the pawl 3 under the elastic force of the elastic element 6; the top end of the top column 5 is hemispherical, a wear-resistant groove is formed in the contact position of the pawl 3 and the top column 5 and located at the lower end of the pawl 3, and the width of the wear-resistant groove 7 is larger than the rotating radius of the top column 5. Further, the elastic element 6 is preferably a spring, but may of course be a wave-shaped elastic steel sheet or the like.
Preferably, the wear-resistant groove is in the shape of a circular ring groove or a cylindrical groove, and when the top pillar 5 and the pawl 3 move relatively, the hemispherical shape of the top pillar 5 rolls in the wear-resistant groove. As shown in fig. 3 and 4, it can be seen that the contact cross section of the prior art is changed from the contact between the excircle at the upper end of the top pillar 5 and the straight line below the pawl 3 into the contact between the small excircle and the large inner circle, and due to the adoption of the design of the circular groove or the cylindrical groove, the comprehensive curvature of the contact surface between the pawl 3 and the top pillar 5 and the contact stress between the pawl 3 and the contact surface between the top pillar 5 are reduced as much as possible, and the contact strength between the pawl 3 and the top pillar 5 is improved under the same material and process conditions; secondly, owing to adopted ring ditch or cylinder ditch design, combine the pawl 3 and can see with the contact site movement track of fore-set 5, the utility model discloses relative slip rate is less than prior art's contact mode. It is similar to the rolling of involute gear teeth when engaged, and it is mainly rolling and sliding as auxiliary, while the prior art mode is mainly relative sliding. Therefore, the utility model discloses the reinforcing fore-set 5 resistance to wear improves fore-set 5 life. Compared with the prior art, the service life of the device is greatly prolonged, and corresponding parts need to be replaced when the device continuously runs for a long time and the service life of the parts is limited. In order to reduce the waste of materials for scrapped parts, on the basis of the technical scheme, a wear-resistant sliding sleeve is fixedly arranged in the cylindrical hole channel 4, and the top pillar 5 can slide up and down in the wear-resistant sliding sleeve, so that the abrasion of the top pillar 5 to the ratchet rack 2 with multiple materials and large volume is avoided.
Further, because the damaged ratchet 1 that leads to with the wearing and tearing of the 5 contact department of fore-set of pawl 3 is more scrapped, for this reason in this embodiment, with 3 components of a whole that can function independently settings of pawl, specifically do pawl 3 including be used for with 2 articulated pawl base members 301 of ratchet frame, pawl base members 301 front end is equipped with U type groove, U type inslot is equipped with the wear-resisting piece 302 of detachable U type, terminal surface under the wear-resisting piece 302 of U type is located to wear-resisting slot. Therefore, when the pawl 3 is seriously worn, only the U-shaped wear-resisting block 302 is replaced, and the material used for scrapping the pawl 3 is reduced. Secondly, the pawl 3 is split and spliced, so that the wear-resistant groove at the pawl 3 is not directly machined on the pawl 3 and is converted to the U-shaped wear-resistant block 302 with a regular appearance, the machining difficulty is greatly reduced, and the manufacturing cost is reduced.
Further, the wear resistance of the wear-resistant sliding sleeve, the top pillar 5 and the U-shaped wear-resistant block 302 is reduced in sequence. Since the weakest part in the ratchet-pawl mechanism is the top post 5. Therefore, the utility model designs a wear-resisting priority of wear-resisting sliding sleeve, fore-set 5 and the wear-resisting piece 302 of U type for the easy fore-set 5 of dismantling is scrapped because wearing and tearing when dismantling the wear-resisting piece 302 of U type as far as easily, and convenient maintenance improves the life-span of fore-set 5 in order to improve ratchet pawl mechanism whole life-span simultaneously.
Finally, 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 the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (5)
1. A wearability ratchet pawl mechanism which characterized in that: the ratchet wheel is sleeved on the ratchet wheel frame; the pawl is hinged to the ratchet rack, a cylindrical hole channel is formed in the ratchet rack, the ejection column is supported and sleeved in the cylindrical hole channel through an elastic element, the ratchet is provided with ratchet internal teeth matched with the pawl, and the ejection column is abutted to the lower end of the pawl under the elastic force of the elastic element; the top end of the top column is hemispherical, a wear-resistant groove is arranged at the lower end of the pawl and at the contact position of the pawl and the top column, and the width of the wear-resistant groove is larger than the rotating radius of the top column.
2. The wear resistant ratchet-pawl mechanism of claim 1, wherein: the wear-resisting groove is in the shape of a circular ring groove or a cylindrical groove, and when the top pillar moves relative to the pawl, the hemispherical shape of the top pillar rolls in the wear-resisting groove.
3. The wear resistant ratchet-pawl mechanism of claim 1 or 2, wherein: the pawl comprises a pawl base body hinged to the ratchet rack, a U-shaped groove is formed in the front end of the pawl base body, a detachable U-shaped wear-resistant block is arranged in the U-shaped groove, and the wear-resistant groove is formed in the lower end face of the U-shaped wear-resistant block.
4. The wear resistant ratchet-pawl mechanism of claim 3, wherein: and a wear-resistant sliding sleeve is fixedly arranged in the cylindrical pore passage, and the jacking column can slide up and down in the wear-resistant sliding sleeve.
5. The wear resistant ratchet-pawl mechanism of claim 4, wherein: the wear-resisting properties of the wear-resisting sliding sleeve, the jacking column and the U-shaped wear-resisting block are reduced in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921434319.XU CN211314905U (en) | 2019-08-31 | 2019-08-31 | Wear-resistant ratchet pawl mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921434319.XU CN211314905U (en) | 2019-08-31 | 2019-08-31 | Wear-resistant ratchet pawl mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211314905U true CN211314905U (en) | 2020-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921434319.XU Active CN211314905U (en) | 2019-08-31 | 2019-08-31 | Wear-resistant ratchet pawl mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211314905U (en) |
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2019
- 2019-08-31 CN CN201921434319.XU patent/CN211314905U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240702 Address after: 450001 No.149, science Avenue, high tech Zone, Zhengzhou City, Henan Province Patentee after: Zheng Ji Suo (Zhengzhou) Transmission Technology Co.,Ltd. Country or region after: China Address before: 450001 149 science Avenue, Zhengzhou high tech Industrial Development Zone, Henan Patentee before: ZHENGZHOU RESEARCH INSTITUTE OF MECHANICAL ENGINEERING Co.,Ltd. Country or region before: China |