阅读说明：本技术 一种恒力存油筒黄油枪 (Constant force oil storage cylinder grease gun ) 是由 杨伟明 韩挺 于 2019-10-23 设计创作，主要内容包括：本发明涉及一种恒力存油筒黄油枪,恒力5到25公斤,包括存油筒筒体、活塞机构,活塞机构连接于存油筒筒体的前端且伸入筒体内,存油筒筒体设置有进出油口,所述存油筒筒体的后端设置有盘簧安装座,盘簧安装座内设置有盘簧,有一拉杆从存油筒筒体的后端伸入筒体内部,所述盘簧的外端连接于拉杆的靠近外端的部位,拉杆的内端设置活塞；所述盘簧安装座与拉杆之间设置有用于锁定拉杆的锁定机构,锁定机构包括由盘簧安装座支撑的拉杆锁板、设置在拉杆锁板和盘簧安装座之间的压簧。本发明采用盘簧结构,盘簧具有恒力效果；具有锁定机构,利用活塞具有的触发件推动拉杆锁板,实现自动锁定；锁定后通过单手按压即可解锁,方便快捷、安全可靠。(The invention relates to a constant-force grease gun with an oil storage cylinder, wherein the constant force is 5-25 kg, the constant-force grease gun comprises an oil storage cylinder body and a piston mechanism, the piston mechanism is connected to the front end of the oil storage cylinder body and extends into the cylinder body, the oil storage cylinder body is provided with an oil inlet and an oil outlet, the rear end of the oil storage cylinder body is provided with a coil spring mounting seat, a coil spring is arranged in the coil spring mounting seat, a pull rod extends into the cylinder body from the rear end of the oil storage cylinder body, the outer end of the coil spring is connected to the part, close to the outer end, of the pull rod, and the inner end of the; and a locking mechanism for locking the pull rod is arranged between the coil spring mounting seat and the pull rod, and the locking mechanism comprises a pull rod locking plate supported by the coil spring mounting seat and a pressure spring arranged between the pull rod locking plate and the coil spring mounting seat. The invention adopts a coil spring structure, and the coil spring has a constant force effect; the locking mechanism is arranged, and the trigger piece arranged on the piston is used for pushing the pull rod locking plate to realize automatic locking; the lock can be unlocked by pressing with one hand after being locked, and the lock is convenient, quick, safe and reliable.)

1. A constant force oil storage cylinder grease gun comprises an oil storage cylinder body (1) and a piston mechanism, wherein a piston cavity is formed in the hollow interior of the oil storage cylinder body, the piston mechanism is connected to the front end of the oil storage cylinder body and extends into the cylinder body, and the oil storage cylinder body is provided with an oil inlet and an oil outlet, and the grease gun is characterized in that a coil spring mounting seat (2) is arranged at the rear end of the oil storage cylinder body, a coil spring (3) is arranged in the coil spring mounting seat, a pull rod (4) extends into the cylinder body from the rear end of the oil storage cylinder body, the outer end of the coil spring is connected to the part, close to the outer end, of the pull rod, and a piston (5) is arranged at;

a locking mechanism for locking the pull rod is arranged between the coil spring mounting seat and the pull rod, and the locking mechanism comprises a pull rod locking plate (6) supported by the coil spring mounting seat and a pressure spring (7) arranged between the pull rod locking plate and the coil spring mounting seat.

2. The constant force cartridge grease gun of claim 1 wherein the constant force is 5 to 25 kilograms.

3. The constant-force oil-storage barrel grease gun according to claim 1, wherein two coil springs are installed in the coil spring installation seat, the pull rod passes through the coil spring installation seat, and the two coil springs are symmetrically arranged on two sides of the pull rod respectively in the coil spring installation seat; the outer ends of the two coil springs are respectively fixed at the outer end of the pull rod.

4. The grease gun with the constant-force grease trap barrel according to claim 3, wherein the cross section of the pull rod is I-shaped, and comprises a pull rod main body (41) in the middle, an upper folded edge (42) vertical to the upper end of the pull rod main body and a lower folded edge (43) vertical to the lower end of the pull rod main body; the coil spring is formed by winding a long-strip spring piece or a long-strip steel wire, and the spring piece or the steel wire exposed out of the coil spring mounting seat is positioned between the upper folding edge and the lower folding edge of the pull rod; the plane of the two coil springs and the plane of the pull rod are the same plane.

5. The constant force oil storage barrel grease gun as claimed in claim 1, wherein a coil spring is mounted in the coil spring mounting seat, the coil spring is located on one side of the pull rod, and the outer end of the coil spring is fixed to the outer end of the pull rod; or three or more disc springs are installed in the disc spring installation seat, the pull rod penetrates through the disc spring installation seat, and all the disc springs are radially arranged around the pull rod in a circumferential mode inside the disc spring installation seat; meanwhile, the pull rod is arranged into a columnar rod piece with a polygonal section, and each coil spring is respectively opposite to one side wall of the pull rod; each axial edge of the pull rod is provided with a convex folded edge, and the coil spring part exposed out of the coil spring mounting seat is positioned between the adjacent folded edges and clings to the side wall of the pull rod.

6. The grease gun with the constant-force grease storage cylinder according to claim 4, wherein the rear end of the cylinder body of the grease storage cylinder is connected with a cylinder cover (8), and the cylinder cover comprises a middle cover plate and a cylinder cover side wall arranged on the periphery of the cover plate; the side wall of the cylinder cover is connected with the side wall at the rear end of the cylinder body of the oil storage cylinder, and the center of the cover plate is provided with a center hole for the pull rod to pass through; the coil spring mounting seat is positioned on the outer side of the cylinder cover and fixedly connected with the cylinder cover; the coil spring mounting seat is arranged into a box body with a cavity inside; the center of one group of opposite side surfaces of the coil spring mounting seat is provided with a through hole, and the pull rod is inserted into the through hole and further penetrates through the center hole of the center of the cylinder cover plate.

7. The grease gun with constant force cartridge as claimed in claim 6, wherein the upper surface of the coil spring mounting seat facing upward and near the edge of the cartridge cover has a guide through hole, and the lower surface of the coil spring mounting seat facing downward and near the edge of the cartridge cover has another guide through hole; the pull rod locking plate is inserted into the two guide through holes simultaneously; the plate surface of the pull rod lock plate is provided with a through hole (60) with an I-shaped outline, and the pull rod is inserted into the through hole; the upper end of the pull rod locking plate extends vertically to form a pressing part (61), the pressing part is exposed out of the coil spring mounting seat, and the pressing part and the top surface of the coil spring mounting seat are connected with the compression spring (7).

8. The constant force cartridge grease gun of claim 7 wherein the portion of the pull rod adjacent the piston is provided as a locking portion; on the locking part of the pull rod, concave upper clamping grooves (45) are symmetrically arranged on two sides of the upper folded edge, and concave lower clamping grooves (46) are symmetrically arranged on two sides of the lower folded edge; when the pull rod locking plate is aligned with the locking part of the pull rod and the pull rod locking plate is vertically deviated relative to the pull rod, the pull rod locking plate can be correspondingly embedded into the upper clamping groove to limit the passing of the pull rod.

9. The grease gun with the constant-force grease storage barrel according to claim 8, wherein the through hole of the pull rod locking plate extends downwards from the lower side of the through hole to form a first clamping piece (62) in a rectangular through hole shape; meanwhile, a second clamping piece (81) which is relatively convex is arranged on the barrel cover, and the first clamping piece and the second clamping piece can be clamped with each other to limit the vertical offset of the pull rod locking plate relative to the pull rod; the lower end of the pull rod locking plate is provided with a limiting piece (63) extending downwards in an inclined mode, and when the pull rod locking plate is vertically and upwards deviated relative to the pull rod, the limiting piece can be abutted against the bottom surface of the coil spring mounting seat or the bottom surface of the pull rod to block the pull rod locking plate from further moving upwards.

10. The grease gun with the constant-force grease storage barrel according to claim 9, wherein the piston is provided with a section of trigger (51) which extends axially along the side wall of the pull rod and faces the barrel cover, the trigger can penetrate through the central hole of the barrel cover and push the pull rod locking plate to incline, and the first clamping piece and the second clamping piece of the inclined pull rod locking plate can be separated from each other.

Technical Field

The invention belongs to the field of grease guns, and particularly relates to a grease gun with a constant-force grease storage cylinder, wherein the constant force is 5-25 kilograms.

Background

A grease gun is a tool for filling mechanical equipment with lubricating grease. The oil storage cylinder of the conventional grease gun uses a pressure spring which is arranged in the oil storage cylinder. During the operation, the pressure spring extends and compresses under the effect of outside push-pull force, and the inner wall of depositing an oil section of thick bamboo may be touch to the pressure spring, and the inner wall of depositing an oil section of thick bamboo is deposited in the damage causes the oil leak. When the compression spring is compressed, the larger the compression amplitude is, the larger the required external tension is, and the force is uneven during manual operation.

The grease gun realizes the suction and the push-out of the lubricating grease through the extension and the contraction of the pull rod. In practical application, the pull rod is found to retract and return rapidly under the action of the spring and easily hit a human body if the pull rod is accidentally touched after being pulled out and locked. If grease is present in the grease reservoir at this time, the grease is rapidly pushed out.

Disclosure of Invention

The invention mainly aims at the defects of the grease gun, and discloses a constant-force grease storage cylinder grease gun which adopts a coil spring structure, wherein the coil spring has a constant-force effect, the constant force is 5-25 kg, namely the pulling force of the constant-force coil spring when being pulled out is independent of the pulling distance and is similar to the pulling effect of a measuring tape; the constant-force coil spring occupies a part of oil storage space when being arranged in the oil storage cylinder, and the constant-force coil spring occupies a smaller space than the pressure spring and can be arranged outside the oil storage cylinder, so that the oil storage cylinder with the same length and capacity has more oil storage capacity; the pull rod locking plate generates deviation relative to the pull rod by utilizing the elastic recovery action of the pressure spring and realizes locking through the dislocation of the clamping piece generated by the deviation; when the locking is carried out, the oil storage cylinder is filled with lubricating grease, at the moment, the piston is close to the cylinder cover, and the trigger piece arranged on the piston is utilized to push the pull rod locking plate to slightly incline and shift, so that automatic locking is realized; the lock can be unlocked by pressing with one hand after being locked, and the lock is convenient, quick, safe and reliable.

The technical problem of the invention is implemented by the following technical scheme: the utility model provides a constant force oil storage cylinder grease gun, is including depositing oil cylinder barrel, piston mechanism, and the inside cavity of oil storage cylinder barrel forms the piston chamber, and piston mechanism connects in the front end of depositing oil cylinder barrel and stretches into in the barrel, and oil storage cylinder barrel is provided with the business turn over hydraulic fluid port, its characterized in that, the rear end of depositing oil cylinder barrel is provided with the coil spring mount pad, is provided with the coil spring in the coil spring mount pad, has a pull rod to stretch into inside the barrel from the rear end of oil storage cylinder barrel, the outer end of coil spring is connected in the position that is close to the outer end of pull rod, and the inner of pull rod sets up the piston.

And a locking mechanism for locking the pull rod is arranged between the coil spring mounting seat and the pull rod, and the locking mechanism comprises a pull rod locking plate supported by the coil spring mounting seat and a pressure spring arranged between the pull rod locking plate and the coil spring mounting seat.

Preferably, the constant force is 5 to 25 kilograms.

Preferably, two coil springs are installed in the coil spring installation seat, the pull rod penetrates through the coil spring installation seat, and the two coil springs are symmetrically arranged on two sides of the pull rod respectively in the coil spring installation seat; the outer ends of the two coil springs are respectively fixed at the outer end of the pull rod. The purpose of the symmetrically arranged coil springs is to balance the force on the pull rod. If only one coil spring is adopted, the constant-force pulling-out effect can be realized, only the stress of the pull rod is slightly uneven, small-amplitude inclination exists in the pulling-out process of the pull rod, and the hinge is seriously abraded.

Preferably, the cross section of the pull rod is I-shaped, and the pull rod comprises a pull rod main body in the middle, an upper folding edge vertical to the upper end of the pull rod main body and a lower folding edge vertical to the lower end of the pull rod main body; the coil spring is formed by winding a long-strip spring piece or a long-strip steel wire, and the spring piece or the steel wire exposed out of the coil spring mounting seat is positioned between the upper folding edge and the lower folding edge of the pull rod; the plane of the two coil springs and the plane of the pull rod are the same plane. The outer end of the pull rod is provided with a pull handle which is convenient for pulling out the pull rod, and the pull handle is used as a force application point of external acting force, thereby being convenient for push-pull operation. The I-shaped pull rod is suitable for the structural mode of two coil springs, the I-shaped pull rod is matched with the spring leaf type coil spring, the pulled spring leaf can be just placed between the upper folded edge and the lower folded edge of the pull rod, and the spring leaf can be tightly attached to the side wall of the pull rod main body; in the process of continuously pushing and pulling the pull rod, the spring leaf cannot be blocked by other components and cannot be abraded; more importantly, the coil spring can not expose out of the pull rod to cut human body, such as easily cutting hands when the tape measure is freely contracted.

Preferably, a coil spring is installed in the coil spring installation seat, the coil spring is located on one side of the pull rod, and the outer end of the coil spring is fixed to the outer end of the pull rod.

Preferably, three or more coil springs are installed in the coil spring installation seat, the pull rod penetrates through the coil spring installation seat, all the coil springs are radially arranged around the pull rod in a circumferential mode inside the coil spring installation seat and are uniformly distributed in 360 degrees, and stress between each coil spring and each pull rod is balanced; meanwhile, the pull rod is arranged into a columnar rod piece with a polygonal section, and each coil spring is respectively opposite to one side wall of the pull rod; each axial edge of the pull rod is provided with a convex folded edge, and the coil spring part exposed out of the coil spring mounting seat is positioned between the adjacent folded edges and clings to the side wall of the pull rod.

Preferably, the rear end of the oil storage cylinder body is connected with a cylinder cover, and the cylinder cover comprises a middle cover plate and a cylinder cover side wall arranged on the periphery of the cover plate; the side wall of the cylinder cover is connected with the side wall at the rear end of the cylinder body of the oil storage cylinder, and the center of the cover plate is provided with a center hole for the pull rod to pass through; the coil spring mounting seat is positioned on the outer side of the cylinder cover and fixedly connected with the cylinder cover; the coil spring mounting seat is arranged into a box body with a cavity inside, and the height and the width of the cavity are matched with the specification of the coil spring; the center of one group of opposite side surfaces of the coil spring mounting seat is provided with a through hole, and the pull rod is inserted into the through hole and further penetrates through the center hole of the center of the cylinder cover plate. The coil spring mounting seat is detachably fixed on the barrel cover and can be detached, so that the coil spring mounting seat is convenient to maintain and clean. Of course, the coil spring mounting seat can also be one part with the cartridge cover, which is only inconvenient to process.

Preferably, the upward top surface of the coil spring mounting seat and the edge close to the cylinder cover are provided with a guide through hole, and meanwhile, the downward bottom surface of the coil spring mounting seat and the edge close to the cylinder cover are provided with another guide through hole; the pull rod locking plate is inserted into the two guide through holes simultaneously; the plate surface of the pull rod lock plate is provided with a through hole with an I-shaped outline, and the pull rod is inserted into the through hole; the upper end of the pull rod locking plate extends vertically to form a pressing part, the pressing part is exposed on the coil spring mounting seat, and the pressing part is connected with the compression spring between the top surfaces of the coil spring mounting seat and the pressing part. When the unlocking is needed, the pressing part of the pull rod locking plate is pressed from top to bottom to drive the pull rod locking plate to move downwards to be hooked by the inclined boss on the cylinder cover, so that the through hole is opposite to the pull rod, the clamping piece of the through hole is separated from the clamping groove of the pull rod locking part, the unlocking is successful, and the pull rod can move back and forth freely; when no external force is applied, the pull rod locking plate cannot be unlocked automatically; when the pull rod is pulled to the end, the piston pushes the pull rod locking plate to leave the inclined boss on the cylinder cover; the pressure spring acts on the pressing part to drive the pull rod locking plate to integrally move upwards, the deviated passing hole and the pull rod form dislocation, and the clamping piece of the passing hole is embedded into the clamping groove of the pull rod locking part to be locked.

Preferably, a part of the pull rod close to the piston is provided as a locking part; at the locking part of the pull rod, concave upper clamping grooves are symmetrically arranged at two sides of the upper folding edge, and concave lower clamping grooves are symmetrically arranged at two sides of the lower folding edge; when the pull rod locking plate is aligned with the locking part of the pull rod and the pull rod locking plate is vertically deviated relative to the pull rod, the pull rod locking plate can be correspondingly embedded into the upper clamping groove to limit the passing of the pull rod. Locking or unlocking can only be performed when the locking portion of the drawbar is in aligned vertical alignment with the drawbar lock plate.

Preferably, the through hole of the pull rod locking plate extends downwards from the lower side of the through hole to form a first clamping piece in a rectangular through hole shape; meanwhile, a second clamping piece which is relatively raised is arranged on the barrel cover, and the first clamping piece and the second clamping piece can be clamped with each other to limit the vertical offset of the pull rod locking plate relative to the pull rod; the lower end of the pull rod locking plate is provided with a limiting piece which extends obliquely downwards, and when the pull rod locking plate vertically deflects upwards relative to the pull rod, the limiting piece can be abutted against the bottom surface of the coil spring mounting seat or the bottom surface of the pull rod to prevent the pull rod locking plate from continuously moving upwards, so that the lower end of the pull rod locking plate is prevented from being completely separated from the guide hole in the bottom surface of the coil spring mounting seat. After unlocking, if the pressing action on the pressing part is eliminated immediately, the pull rod locking plate can restore to move upwards immediately, so that the first clamping piece and the second clamping piece are mutually abutted and clamped in order to keep the pull rod locking plate in an unlocked state.

Preferably, the piston is provided with a section of trigger piece which extends along the axial direction of the side wall of the pull rod and faces the direction of the cylinder cover, the trigger piece can penetrate through the central hole of the cylinder cover and push the pull rod locking plate to incline, and the first clamping piece and the second clamping piece of the inclined pull rod locking plate can be mutually separated; the trigger piece is positioned below the pull rod, so that the pull rod locking plate can be more easily pushed to incline. The locking process of the pull rod is automatic, when the pull rod is pulled out manually, the piston is close to the cylinder cover, after the piston moves outwards along with the pull rod, the trigger piece on the piston penetrates through the center hole of the cylinder cover and pushes the pull rod locking plate, so that the pull rod locking plate slightly inclines, meanwhile, the first clamping piece is separated from the constraint of the second clamping piece, and the pull rod locking plate upwards deflects under the action of the pressure spring and locks the pull rod.

In summary, compared with the prior art, the invention has the following advantages:

the invention adopts a coil spring structure, the coil spring has a constant force effect, the constant force is 5-25 kg, namely the pulling force of the constant force coil spring when being pulled out is independent of the pulling distance, and the constant force coil spring is similar to the pulling effect of a measuring tape; the coil spring is arranged outside the oil storage cylinder, so that the inside of the oil storage cylinder cannot be damaged; the coil spring does not occupy the space inside the oil storage cylinder, and the oil storage cylinder with the same length and capacity has more oil storage capacity; the invention has a pull rod lock plate which generates deviation relative to the pull rod by utilizing the elastic recovery action of a pressure spring and realizes locking by the dislocation of a clamping piece generated by the deviation; the locking operation is automatic, the locking time is that the piston is close to the cylinder cover, the trigger piece arranged on the piston is used for pushing the pull rod locking plate to slightly incline and shift, the automatic locking is realized, the unlocking can be realized by pressing with one hand after the locking, and the locking is convenient and quick; the pull rod locking plate and the cylinder cover are mutually bound through the first clamping piece and the second clamping piece so as to maintain the pull rod in an unlocking state.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a cross-sectional view of the locking mechanism of the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a cross-sectional view of the drawbar lock plate and drawbar of the present invention;

FIG. 6 is a schematic view of the locking plate of the pull rod of the present invention in a locked state with the pull rod.

The reference numbers in the figures are: 1. an oil storage cylinder body; 2. a coil spring mount; 3. a coil spring; 4. a pull rod; 41. a pull rod body; 42. folding the edges; 43. folding the lower edge; 45. an upper clamping groove; 46. a lower clamping groove; 5. a piston; 51. a trigger; 6. a pull rod locking plate; 60. a through hole; 61. a pressing part; 62. a first engaging member; 63. a limiting member; 7. a pressure spring; 8. a cylinder cover; 81. a second engaging member; 9. and (5) pulling the handle.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.