CN214533508U - Adjustable constant-flow overflow pump - Google Patents
Adjustable constant-flow overflow pump Download PDFInfo
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- CN214533508U CN214533508U CN202120311900.3U CN202120311900U CN214533508U CN 214533508 U CN214533508 U CN 214533508U CN 202120311900 U CN202120311900 U CN 202120311900U CN 214533508 U CN214533508 U CN 214533508U
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- gear
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- sleeve
- adjusting shaft
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Abstract
The utility model relates to a constant current overflow pump with adjustable, including the pump body, back lid, pump shaft, gear, constant current overflow valve. The pump shaft comprises an inner shaft core and an adjusting shaft sleeve which are sleeved inside and outside and are in threaded connection, a gear sleeve is arranged on the adjusting shaft sleeve, key grooves which extend axially are concavely matched on the adjusting shaft sleeve and the gear, and the adjusting shaft sleeve and the gear are circumferentially fixed through the matching of flat keys and the key grooves; one end of the adjusting shaft sleeve is provided with a radial flange, and one side of the gear is abutted against the radial flange; a nut is screwed on the inner shaft core through threads, and abuts against the other side of the gear to axially fix the gear; the nut locking device comprises a gear, a nut locking sleeve, a plurality of elastic locking pieces and a nut, wherein the nut locking sleeve is convexly arranged on the butt end face of the gear and the nut, the circumferential wall of the outer end of the nut locking sleeve is provided with a plurality of open grooves at intervals to enable the nut locking sleeve to be divided into the plurality of elastic locking pieces, and the nut is screwed into the nut locking sleeve to enable the locking pieces to expand outwards and tightly hold the nut by means of elastic deformation. The fixed position of this structure adjustable gear and pump shaft just effectively strengthens its spacing effect.
Description
Technical Field
The utility model relates to a gear pump technical field especially relates to a constant current overflow pump with adjustable.
Background
The constant flow overflow pump has a constant flow pump consisting of an external gear pump with automatic axial clearance compensation and radial hydraulic compensation and a constant flow overflow valve, and the series of products have the advantages of small size, light weight, good performance, reliable use and convenient maintenance, can be widely applied to various models of tractors and modified agricultural machinery products for hydraulic power steering, provides constant flow, and ensures the safe, reliable and stable work of the system. The constant-flow overflow pump generally comprises a pump body and a rear cover, wherein two pump shafts are arranged in the pump body, gears which are meshed with each other are sleeved on the two pump shafts respectively, and a constant-flow overflow valve is arranged on the rear cover.
The constant-current overflow pump in the prior art is provided with the annular step on the pump shaft, supports the gear against the annular step during installation, and the flat key simultaneously goes deep into the key groove of the gear and the key groove of the pump shaft to reach circumferential limit, then supports against the gear through the shaft sleeve, passes through swivel nut and pump shaft threaded connection in one end of the shaft sleeve, and carries out axial positioning to the gear through annular step, shaft sleeve and swivel nut.
In the structure, the fixed position of the gear on the pump shaft cannot be changed and adjusted. However, each part of the constant-flow overflow pump inevitably has certain manufacturing deviation, deformation and the like in the processing and manufacturing process, and the installation position of the gear may be inaccurate, so that the normal operation of the constant-flow overflow pump is influenced. When the threaded sleeve is used for positioning, the threaded sleeve may rotate and loosen under the conditions of external vibration and the like, so that the gear is axially loosened.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome above-mentioned problem, and provided a constant current overflow pump with adjustable, can adjust gear in a flexible way in epaxial fixed position of pump in order to compensate manufacturing deviation etc. and effectively strengthen its fixed spacing effect.
The technical scheme of the utility model is that:
constant current overflow pump with adjustable, establish the back lid at pump body rear end including the pump body and lid, be provided with two pump shafts in the pump body and two pump shafts on respectively the cover be equipped with intermeshing's gear, cover after and installed constant current overflow valve, its characterized in that: the pump shaft comprises an inner shaft core and an adjusting shaft sleeve sleeved outside the inner shaft core, the inner shaft core and the adjusting shaft sleeve are in threaded connection, the gear is correspondingly sleeved on the adjusting shaft sleeve, axially extending key grooves are respectively matched and concavely arranged on the outer wall of the adjusting shaft sleeve and the inner hole of the gear, and circumferential fixation is realized between the adjusting shaft sleeve and the gear through the matching of flat keys and the key grooves; one end of the adjusting shaft sleeve extends radially along the outer circumference to form a radial flange, and one side end face of the gear abuts against the radial flange; a nut is screwed on the inner shaft core in a threaded manner and tightly abuts against the end face of the other side of the gear to realize the axial fixation of the gear;
wherein, still protruding nut locking collar that is equipped with an axial extension on the terminal surface of gear and nut butt, the interval is equipped with multichannel open slot and makes nut locking collar be separated into a plurality of elastic locking pieces that have on the circumference wall of nut locking collar outer end, the nut is screwed in the nut locking collar and is made the locking piece outwards rise and rely on its elastic deformation to hold the nut outer wall tightly.
With the help of the structure, the axial position of the adjusting shaft sleeve on the inner shaft core is changed through the spiral rotation of the adjusting shaft sleeve, so that the positions of the radial flange matched with the gear and the key groove on the pump shaft are changed, and the installation position of the gear is also changed; meanwhile, the nut anti-loosening sleeve is additionally arranged on the contact surface of the gear and the nut, the nut is limited to rotate randomly by means of elastic deformation of the nut, and the fixing and limiting effects of the gear are effectively enhanced.
Further, constant current overflow pump with adjustable, be equipped with antifriction rubber layer between radial flange and the gear, avoid gear end face and radial flange friction damage.
Further, in the adjustable constant-current overflow pump, the nut anti-loosening sleeve and the gear are integrally formed.
Further, constant current overflow pump with adjustable, the nut locking collar in by gear side direction nut side be the convergent form.
Further, constant current overflow pump with adjustable, in, the open slot is no less than three, and follows the circumference wall evenly distributed of nut locking cover, can follow each direction and hold the nut tightly to even elasticity.
The utility model has the advantages that:
the utility model divides the integrated pump shaft into an inner shaft core and an adjusting shaft sleeve which are in threaded fit, and changes the positions of a radial flange and a key groove which are matched with the gear on the pump shaft by spirally rotating the adjusting shaft sleeve, thereby changing the installation position of the gear to compensate the manufacturing and processing deviation and the like; meanwhile, a nut anti-loosening sleeve is additionally arranged on the contact surface of the gear and the nut, and the nut is limited to rotate freely by means of elastic deformation of the nut anti-loosening sleeve.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the adjusting shaft sleeve of the present invention.
Fig. 3 is the structure schematic diagram of the gear and nut anti-loose sleeve of the utility model.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings:
referring to fig. 1-3, the adjustable constant-flow overflow pump of the present embodiment includes a pump body 1 and a rear cover 2 covering the rear end of the pump body 1, two pump shafts 3 are disposed in the pump body 1, gears 4 engaged with each other are respectively sleeved on the two pump shafts 3, and a constant-flow overflow valve is mounted on the rear cover 2. The pump shaft 3 comprises an inner shaft core 301 and an adjusting shaft sleeve 302 sleeved outside the inner shaft core 301, the inner shaft core 301 and the adjusting shaft sleeve are in threaded connection, the gear 4 is correspondingly sleeved on the adjusting shaft sleeve 302, axially extending key grooves 8 are respectively matched and concavely arranged on the outer wall of the adjusting shaft sleeve 302 and the inner hole of the gear 4, and therefore circumferential fixation is achieved between the adjusting shaft sleeve 302 and the gear 4 through matching of a flat key 5 and the key grooves 8; one end of the adjusting shaft sleeve 302 extends radially along the outer circumference to form a radial flange 303, and one side end face of the gear 4 abuts against the radial flange 303; an anti-friction rubber layer (not shown) is provided between the radial flange 303 and the gear 4. A nut 6 is screwed on the inner shaft core 301, and the nut 6 abuts against the end face of the other side of the gear 4 to axially fix the gear 4.
Referring to fig. 1 and 3, an axially extending nut anti-loosening sleeve 7 is further convexly arranged on the end face of the gear 4 abutted to the nut 6, the nut anti-loosening sleeve 7 and the gear 4 are integrally formed, and the nut anti-loosening sleeve 7 is tapered from the gear 4 side to the nut 6 side. The interval is equipped with multichannel open slot 701 and makes nut anti-loosening sleeve 7 separated into a plurality of elastic anti-loosening pieces that have on the circumference wall of nut anti-loosening sleeve 7 outer end, and is concrete, open slot 701 is no less than three, and follows nut anti-loosening sleeve 7's circumference wall evenly distributed. The nut 6 is screwed into the nut anti-loosening sleeve 7, so that the anti-loosening sheet is expanded outwards and holds the outer wall of the nut 6 tightly by means of elastic deformation of the anti-loosening sheet.
When the structure is installed, the adjusting shaft sleeve 302 is firstly spirally rotated to adjust the proper position of the adjusting shaft sleeve 302 on the inner shaft core 301, the flat key 5 is placed in the key groove 8 of the adjusting shaft sleeve 302, the gear 4 is sleeved on the adjusting shaft sleeve 302 and is abutted against the radial flange 303, and the flat key 5 is simultaneously embedded in the two key grooves 8 to enable the gear 4 to be limited circumferentially; then, the nut 6 is sleeved in, the nut is gradually screwed inwards, the nut enters the nut anti-loosening sleeve 7, each anti-loosening sheet is gradually propped open until the nut 6 is abutted against the end face of the gear 4 to achieve axial limiting, the anti-loosening sheets located on the outer side of the nut 6 tightly hold the nut 6 through elastic deformation, and the nut 6 is effectively prevented from rotating randomly.
The specific embodiments described herein are merely illustrative of the principles of the present invention and its efficacy, and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical idea of the present invention shall be covered by the claims of the present invention.
Claims (5)
1. Constant current overflow pump with adjustable establish the back lid at pump body rear end including the pump body with the lid, be provided with two pump shafts in the pump body and two pump shafts on overlap respectively and be equipped with intermeshing's gear, the back is covered and is installed constant current overflow valve, its characterized in that: the pump shaft comprises an inner shaft core and an adjusting shaft sleeve sleeved outside the inner shaft core, the inner shaft core and the adjusting shaft sleeve are in threaded connection, the gear is correspondingly sleeved on the adjusting shaft sleeve, axially extending key grooves are respectively matched and concavely arranged on the outer wall of the adjusting shaft sleeve and the inner hole of the gear, and circumferential fixation is realized between the adjusting shaft sleeve and the gear through the matching of flat keys and the key grooves; one end of the adjusting shaft sleeve extends radially along the outer circumference to form a radial flange, and one side end face of the gear abuts against the radial flange; a nut is screwed on the inner shaft core in a threaded manner and tightly abuts against the end face of the other side of the gear to realize the axial fixation of the gear;
wherein, still protruding nut locking collar that is equipped with an axial extension on the terminal surface of gear and nut butt, the interval is equipped with multichannel open slot and makes nut locking collar be separated into a plurality of elastic locking pieces that have on the circumference wall of nut locking collar outer end, the nut is screwed in the nut locking collar and is made the locking piece outwards rise and rely on its elastic deformation to hold the nut outer wall tightly.
2. The adjustable constant-flow overflow pump of claim 1, wherein: and an anti-friction rubber layer is arranged between the radial flange and the gear.
3. The adjustable constant-flow overflow pump of claim 1, wherein: the nut anti-loosening sleeve and the gear are integrally formed.
4. The adjustable constant-flow overflow pump of claim 1, wherein: the nut anti-loosening sleeve is gradually reduced from the side of the gear to the side of the nut.
5. The adjustable constant-flow overflow pump of claim 1, wherein: the open slot is no less than three, and evenly distributed along the circumference wall of the nut anti-loosening sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120311900.3U CN214533508U (en) | 2021-02-04 | 2021-02-04 | Adjustable constant-flow overflow pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120311900.3U CN214533508U (en) | 2021-02-04 | 2021-02-04 | Adjustable constant-flow overflow pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214533508U true CN214533508U (en) | 2021-10-29 |
Family
ID=78233677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120311900.3U Active CN214533508U (en) | 2021-02-04 | 2021-02-04 | Adjustable constant-flow overflow pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214533508U (en) |
-
2021
- 2021-02-04 CN CN202120311900.3U patent/CN214533508U/en active Active
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