Manual grease gun with rotary grease supply structure

Abstract

The invention 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 present invention relates to the technical field of grease guns, and specifically to a manual grease gun with a rotary oil supply structure. Background Art

[0002] A grease gun is a manual tool for injecting grease into mechanical equipment. It can be equipped with an iron gun rod (iron gun head) or a hose (flat gun head) oil nozzle. It has many advantages such as simple operation, convenient carrying, and wide application range, and is an essential tool for vast numbers of agricultural machine operators and maintenance centers.

[0003] There are different types of grease guns such as pneumatic grease guns, manual grease guns, foot-operated grease guns, and electric grease guns. For machinery such as excavators, cranes, and large construction machinery, using a manual high-pressure grease gun can more comprehensively and effectively improve efficiency.

[0004] Traditional manual grease gun: As described in a manual grease gun with the publication (announcement) number CN213686169U submitted by the applicant in 2020, it includes an oil storage cylinder, a gun head, and a handle. The gun head covers the upper opening end of the oil storage cylinder. The gun head is provided with a oil pushing chamber, an oil inlet and an oil outlet nozzle communicated with the oil pushing chamber. A oil pushing rod is slidably arranged in the oil pushing chamber, and one end of the oil pushing rod is exposed outside the oil pushing chamber. This traditional manual grease gun uses a reciprocating sliding motion mode for the oil pushing rod to supply oil. This oil supply method has the defects of uneven power transmission and large resistance and unstable oil pressure affected by the operator's frequency, so it still needs to be further improved. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose a manual grease gun with a rotary oil supply structure that is reasonably designed, can reduce friction, lower resistance, and has uniform power transmission and small oil pressure fluctuations.

[0006] 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 includes an oil storage cylinder, a gun head, and a handle. The gun head covers the upper opening end of the oil storage cylinder. The gun head is provided with an oil pushing chamber, an oil inlet and an oil outlet nozzle communicated with the oil pushing chamber. A rotary oil supply device is fitted in the oil pushing chamber. The rotary oil supply device includes 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 restricting the rotary sleeve, and a double-sided ball bearing assembly arranged at the end of the spiral oil rod. Both sides of the double-sided ball bearing assembly are 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 pressing on the front buffer ball and the rear buffer ball. Travel bolts are symmetrically arranged on both sides of the bearing seat.

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

[0010] Preferably, travel grooves for the travel bolts to slide and fit are symmetrically arranged on both sides of the handle.

[0011] Preferably, a nut for restricting the position of the double-sided ball bearing assembly is screwed at the end of the spiral oil rod.

[0012] Preferably, a sealing ring is arranged on one side of the rotating sleeve relative to the oil inlet.

[0013] Preferably, a clamping groove for the end cover to be clamped is arranged on one side of the gun head relative to the rotating sleeve.

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

[0015] 1. Through the structural design of the rotary oil supply device of the manual grease gun of the present invention, the traditional reciprocating sliding motion mode of oil supply is replaced, and the rotary oil supply of the spiral oil rod on the gun head is realized, which can greatly reduce the friction force and resistance, greatly reduce the influence of the operator's operation frequency on the oil supply, and the power transmission is uniform and the output oil pressure change is small.

[0016] 2. The manual grease gun of the present invention adopts the structural setting of the double-sided ball bearing assembly cooperating with the handle, avoiding jamming during the process of pulling and pressing the handle for rotary oil supply, with a simple structure, reasonable design and very stable and reliable operation. Brief Description of the Drawings

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

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

[0019] Figure 3 is a schematic diagram of a manual grease gun with a rotary oil supply structure according to the present invention removing the handle;

[0020] Figure 4 is of the present invention Figure 2 Partial enlarged view of A in. Detailed Description of the Invention

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1 to 4 , a manual grease gun with a rotary oil supply structure, including an oil storage cylinder 1, a gun head 2 and a handle 3. The gun head 2 covers the upper opening end of the oil storage cylinder 1. The gun head 2 is provided with a oil pushing cavity 4, an oil inlet 5 and an oil outlet nozzle 6 communicating with the oil pushing cavity 4. A rotary oil supply device 7 is fitted in the oil pushing cavity 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 restricting the rotary sleeve 71, and a double-sided ball bearing assembly 74 arranged at the end of the spiral oil rod 72. Both sides of the double-sided ball bearing assembly 74 are fitted on the handle 3. The process of the rotary oil supply device 7 rotating to supply oil is as follows: pressing the handle 3 to squeeze the double-sided ball bearing assembly 74 and making the spiral oil rod 72 rotate in the rotary sleeve 71, supplying oil forward while rotating, pressing the grease in the oil inlet 5 to the oil outlet nozzle 6 to achieve oil supply, which can greatly reduce the friction force and resistance, greatly reduce the influence of the operator's operation frequency on oil supply, and the power transmission is uniform and the output oil pressure changes little.

[0023] Specifically refer to Figure 4 , the double-sided ball bearing assembly 74 includes a bearing seat 741, a front buffer steel ball 742 and a rear buffer steel ball 743 respectively arranged on both sides of the bearing seat 741, and a front bearing ring 744 and a rear bearing ring 745 respectively pressing the front buffer ball 742 and the rear buffer ball 743. Stroke bolts 746 are symmetrically arranged on both sides of the bearing seat 741. When the handle is pressed to supply oil, the front buffer ball 742 is squeezed and fixed between the bearing seat 741 and the front bearing ring 744 due to the pressing and stops rolling, while the rear buffer ball 743 is not squeezed and can still roll. When the handle is pulled back to let oil in, the rear buffer ball 743 is squeezed and fixed directly between the bearing seat 741 and the rear bearing ring 745 and stops rolling, while the front buffer steel ball 742 is not squeezed and can still roll. Therefore, the situation of locking will not occur whether during the process of pressing the handle to rotate and supply oil or when pulling back the handle to let oil in. 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 shaft 31 and a second pin shaft 32. The first pin shaft 31 is hinged to the gun head 2, and connecting plates 8 are symmetrically hinged to the second pin shaft 32. The connecting plates 8 are respectively fitted on the stroke bolts 746. The handle 3 realizes pressing and pulling on the gun head through the first pin shaft 31 and the second pin shaft 32, and the connecting plates 8 ensure the stable operation of the rotary oil supply device 7.

[0025] Stroke grooves 33 for the sliding fit of the stroke bolts 746 are symmetrically arranged on both sides of the handle 3. The stroke grooves 33 ensure the sliding of the stroke bolts 746 to realize the operation of the rotary oil supply device 7.

[0026] A nut 9 for restricting the position of the double-sided ball bearing assembly 74 is screwed to the end of the spiral oil rod 72.

[0027] A sealing ring 10 is arranged on the side of the rotary sleeve 71 opposite to the oil inlet 5. The sealing ring 10 ensures the sealing effect and avoids oil leakage.

[0028] A clamping groove 21 for the end cover 73 to be clamped is arranged on the side of the gun head 2 opposite to the rotary sleeve 71. The end cover 73 is fixed to the gun head 2 by screws, and the clamping groove 21 plays a guiding role to ensure the locking and fixing of the end cover 73.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. 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 storage cylinder, a gun head and a handle. The gun head covers the upper opening end of the oil storage cylinder. The gun head is provided with a grease pushing cavity, an oil inlet and an oil outlet nozzle communicated with the grease pushing cavity. It is characterized in that: A rotary oil supply device is fitted in the oil pushing cavity. The rotary oil supply device includes 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 restricting the rotary sleeve, and a double-sided ball bearing assembly arranged at the end of the spiral oil rod. Both sides of the double-sided ball bearing assembly are fitted 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 pressing the front buffer ball and the rear buffer ball. Stroke 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: A first pin shaft and a second pin shaft are arranged on the handle. The first pin shaft is hinged to the gun head, and connecting plates are symmetrically hinged on the second pin shaft. The connecting plates are respectively fitted on the stroke bolts.

4. A manual grease gun with a rotary oil supply structure according to claim 3, characterized in that: Stroke grooves for the stroke bolts to slide and fit are symmetrically arranged on both sides of the handle.

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

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 arranged on one side of the rotary 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 arranged on one side of the gun head opposite to the rotary sleeve.

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