Manual grease gun with rotary grease supply structure

Abstract

The utility model discloses a manual grease gun with a rotary grease supply structure, and aims to provide the manual grease gun with the rotary grease supply structure, which is reasonable in design, can reduce friction force and resistance, is uniform in power transmission and small in output oil pressure variation, and comprises a grease storage barrel, a gun head and a handle, the gun head is provided with an oil pushing cavity, an oil inlet and an oil outlet nozzle, the oil inlet and the oil outlet nozzle are communicated with the oil pushing cavity, and a rotary oil supply device is arranged in the oil pushing cavity in a matched mode. The rotary oil supply device comprises a rotary sleeve arranged at the rear end of the gun head in a matched mode, a spiral oil rod arranged in the rotary sleeve in a matched mode, an end cover fixed to the rear end of the gun head and used for limiting the rotary sleeve and a double-face ball bearing assembly arranged at the tail end of the spiral oil rod, and the two sides of the double-face ball bearing assembly are arranged on the handle in a matched mode.

Description

Technical Field

[0001] The utility model relates to the technical field of grease guns, in particular to a manual grease gun with a rotating oil supply structure. Background Art

[0002] A grease gun is a hand tool used to add grease to mechanical equipment. It can be equipped with either an iron barrel (iron tip) or a hose (flat tip) grease nozzle. Its ease of operation, portability, and wide range of applications make it an essential tool for agricultural machinery operators and maintenance centers.

[0003] There are different types of grease guns, including pneumatic grease guns, manual grease guns, foot-operated grease guns, electric grease guns, etc. Machines such as excavators, cranes, and large-scale construction machinery can improve their efficiency more comprehensively and effectively by using manual high-pressure grease guns.

[0004] Traditional manual grease gun: A manual grease gun as described in the publication (announcement) No. CN213686169U submitted by the applicant in 2020, comprising an oil storage cylinder, a gun head and a handle, the gun head cover being arranged at the upper open end of the oil storage cylinder, the gun head being provided with an oil pushing chamber and an oil inlet and an oil outlet connected to the oil pushing chamber, an oil pushing rod being slidingly arranged in the oil pushing chamber, one end of the oil pushing rod being exposed to the oil pushing chamber, the oil pushing rod of this traditional manual grease gun adopts a reciprocating sliding motion to supply oil, the power transmission of this oil supply method is uneven and is affected by the frequency of the operator, and has the defects of large resistance and unstable oil pressure, so it needs further improvement. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a manual grease gun with a rotary oil supply structure that is reasonably designed and can reduce friction, lower resistance, and transmit power evenly with small fluctuations in output oil pressure.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A manual grease gun with a rotary oil supply structure comprises an oil storage cylinder, a gun head and a handle, the gun head cover being arranged at the upper open end of the oil storage cylinder, the gun head being provided with an oil pushing chamber and an oil inlet and an oil outlet connected to the oil pushing chamber, the oil pushing chamber being equipped with a rotary oil supply device, the rotary oil supply device comprising a rotary sleeve fitted at the rear end of the gun head, a spiral oil rod fitted in the rotary sleeve, an end cover fixed at the rear end of the gun head for limiting the rotary sleeve and a double-sided ball bearing assembly arranged at the end of the spiral oil rod, the two sides of the double-sided ball bearing assembly being fitted on the handle.

[0008] Preferably, the double-sided ball bearing assembly includes a bearing seat, a front buffer steel ball and a rear buffer steel ball respectively arranged on both sides of the bearing seat, and a front bearing ring and a rear bearing ring respectively covering the front buffer ball and the rear buffer ball, and travel bolts are symmetrically arranged on both sides of the bearing seat.

[0009] Preferably, the handle is provided with a first pin and a second pin, the first pin is hinged to the gun head, and the second pin is symmetrically hinged with a connecting plate, and the connecting plates are respectively fitted on the travel bolts.

[0010] Preferably, travel grooves for sliding engagement of the travel bolts are symmetrically provided on both sides of the handle.

[0011] Preferably, a nut for limiting the position of the double-sided ball bearing assembly is threadedly connected to the end of the spiral oil rod.

[0012] Preferably, a sealing ring is provided on the side of the rotating sleeve opposite to the oil inlet.

[0013] Preferably, a slot for the end cover to be engaged is provided on the side of the gun head opposite to the rotating sleeve.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This practical manual grease gun replaces the traditional reciprocating sliding motion oil supply method through the structural design of the rotary oil supply device, and realizes the rotation of the spiral oil rod on the gun head to supply oil, which can greatly reduce friction and resistance, and greatly reduce the influence of the operator's operating frequency on the oil supply. The power transmission is uniform and the output oil pressure fluctuation is small.

[0016] 2. This practical manual grease gun adopts a double-sided ball bearing assembly in conjunction with the handle structure to avoid locking during the rotation of the pull-press handle and oil supply process. It has a simple structure, reasonable design and very stable and reliable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a manual grease gun with a rotating oil supply structure according to the present invention;

[0018] Figure 2 This is a half-section schematic diagram of a manual grease gun with a rotary oil supply structure according to the present invention;

[0019] Figure 3 This is a schematic diagram of a manual grease gun with a rotary oil supply structure according to the present invention without a handle;

[0020] Figure 4 For this utility model Figure 2 A partial enlarged view of middle A. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figures 1 to 4 A manual grease gun with a rotary oil supply structure includes an oil storage cylinder 1, a gun head 2 and a handle 3. The gun head 2 is covered with an upper open end of the oil storage cylinder 1. The gun head 2 is provided with an oil pushing chamber 4 and an oil inlet 5 and an oil outlet nozzle 6 connected to the oil pushing chamber 4. A rotary oil supply device 7 is provided in the oil pushing chamber 4. The rotary oil supply device 7 includes a rotary sleeve 71 fitted at the rear end of the gun head 2, a spiral oil rod 72 fitted in the rotary sleeve 71, an end cover 73 fixed at the rear end of the gun head 2 for limiting the rotary sleeve 71, and a screw rod 72 provided on the screw oil The double-sided ball bearing assembly 74 at the end of the rod 72, and the two sides of the double-sided ball bearing assembly 74 are matched on the handle 3. The rotating oil supply process of the rotary oil supply device 7 is as follows: press the handle 3 to squeeze the double-sided ball bearing assembly 74 and make the spiral oil rod 72 rotate in the rotating sleeve 71, while rotating and supplying oil forward, pressing the butter in the oil inlet 5 to the oil outlet 6 to realize oil supply, which can greatly reduce friction and reduce resistance, and greatly reduce the influence of the operator's operating frequency on oil supply. The power transmission is uniform and the output oil pressure changes little.

[0023] Specific reference Figure 4 When oil is supplied, the front buffer ball 742 is squeezed and fixed between the bearing seat 741 and the front bearing ring 744 due to the pressing action, and no longer rolls, while the rear buffer ball 743 can still roll without being squeezed. When the handle is pulled open to supply oil, the rear buffer ball 743 is directly squeezed and fixed between the bearing seat 741 and the rear bearing ring 745 due to the squeezing action, and no longer rolls, while the front buffer steel ball 742 can still roll without being squeezed. Therefore, no matter whether the handle is pressed to rotate and supply oil or when the handle is pulled open to supply oil, there will be no locking. The structure is simple, the design is reasonable, and the operation is very stable and reliable.

[0024] The handle 3 is provided with a first pin 31 and a second pin 32. The first pin 31 is hinged to the gun head 2. The second pin 32 is symmetrically hinged with a connecting plate 8. The connecting plates 8 are respectively fitted on the stroke bolts 746. The handle 3 is pressed and pulled on the gun head through the first pin 31 and the second pin 32. The connecting plate 8 ensures the stable operation of the rotating oil supply device 7.

[0025] The handle 3 is symmetrically provided with travel grooves 33 for sliding engagement of the travel bolt 746 . The travel grooves 33 ensure the sliding of the travel bolt 746 to realize the operation of the rotary oil supply device 7 .

[0026] The end of the spiral oil rod 72 is threaded with a nut 9 that limits the position of the double-sided ball bearing assembly 74.

[0027] A sealing ring 10 is provided on the side of the rotating sleeve 71 opposite to the oil inlet 5 , and the sealing ring 10 ensures a sealing effect to prevent oil leakage.

[0028] A slot 21 for the end cover 73 to be engaged is provided on one side of the gun head 2 opposite to the rotating sleeve 71 . The end cover 73 is fixed to the gun head 2 by screws. The slot 21 serves as a guide to ensure that the end cover 73 is locked and fixed.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A manual grease gun with a rotary oil supply structure, comprising an oil reservoir, a gun head, and a handle, wherein the gun head cover is disposed on the upper open end of the oil reservoir, and the gun head is provided with an oil push chamber and an oil inlet and an oil outlet connected to the oil push chamber, characterized in that: The oil pushing chamber is equipped with a rotary oil supply device, which includes a rotating sleeve equipped at the rear end of the gun head, a spiral oil rod equipped in the rotating sleeve, an end cover fixed at the rear end of the gun head for limiting the rotating sleeve, and a double-sided ball bearing assembly arranged at the end of the spiral oil rod, and both sides of the double-sided ball bearing assembly are equipped on the handle.

2. The manual grease gun with a rotary oil supply structure according to claim 1, characterized in that: The double-sided ball bearing assembly includes a bearing seat, a front buffer steel ball and a rear buffer steel ball respectively arranged on both sides of the bearing seat, and a front bearing ring and a rear bearing ring respectively covering the front buffer ball and the rear buffer ball. Travel bolts are symmetrically arranged on both sides of the bearing seat.

3. The manual grease gun with a rotary oil supply structure according to claim 2, characterized in that: The handle is provided with a first pin and a second pin. The first pin is hinged to the gun head. The second pin is symmetrically hinged with a connecting plate. The connecting plates are respectively fitted on the stroke bolts.

4. The manual grease gun with a rotary oil supply structure according to claim 3, characterized in that: Travel grooves for sliding fit of the travel bolts are symmetrically arranged on both sides of the handle.

5. The manual grease gun with a rotary oil supply structure according to claim 1, characterized in that: The end of the spiral oil rod is threadedly connected with a nut for limiting the position of the double-sided ball bearing assembly.

6. A manual grease gun with a rotary oil supply structure according to any one of claims 1 to 5, characterized in that: A sealing ring is provided on the side of the rotating sleeve opposite to the oil inlet.

7. A manual grease gun with a rotary oil supply structure according to any one of claims 1 to 5, characterized in that: A clamping groove for the end cover to be clamped is provided on one side of the gun head opposite to the rotating sleeve.

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