A grease gun connector

Abstract

This utility model relates to the field of grease gun technology, and more particularly to a grease gun connector, comprising: a sleeve with a core tube fixedly disposed at one end; a sleeve with an axially movable clamping tube inside, the clamping tube including multiple radially expandable clamping plates; an oil injection tube disposed inside the clamping tube, forming an axial limiting structure with the clamping plates through a retaining ring; the core tube being connected to the clamping tube; an elastic reset mechanism being connected between the sleeve and the sleeve; and an operating mechanism being disposed outside the sleeve, which can drive the clamping tube and clamping plates to move axially. This connector, through its innovative integrated design of the clamping tube and clamping plates, achieves an integrated structure for the clamping part, resulting in a compact and non-loose structure, significantly reducing assembly difficulty, avoiding the assembly gaps of traditional split structures, and significantly improving overall strength and durability.

Description

Technical Field

[0001] This utility model relates to the field of grease gun technology, and in particular to a grease gun connector. Background Technology

[0002] In the field of grease gun technology, connectors are key components used to stably connect grease guns to grease nipple connectors. For example, an improved grease connector disclosed in prior art (authorized publication CN102639916A) includes an elongated body with a channel extending along its entire length. The rear end of the body includes a threaded inlet, and the front part (discharge section) includes a clamping device for engaging with a grease nipple. This clamping device can be manually operated to engage or disengage from the grease nipple.

[0003] However, the connector disclosed above still has the following technical problems in use: its clamping part adopts multiple clamping claws for independent split design, which makes the whole part more numerous, not only loose in structure, but also difficult to assemble. Summary of the Invention

[0004] The main purpose of this invention is to overcome the shortcomings of the existing technology and provide a grease gun connector.

[0005] The technical solution adopted by this utility model to achieve its technical objective is: a grease gun connector, comprising:

[0006] The sleeve has a core tube fixedly installed at one end inside. One end of the core tube extends to the outside of the sleeve and is provided with a first sealing ring. The first sealing ring and the clamping tube port form a secondary seal to prevent grease leakage.

[0007] The sleeve has an axially movable clamping tube inside, the clamping tube including a plurality of radially expandable clamping pieces integrally connected to the clamping tube.

[0008] The oil injection pipe is disposed inside the clamping pipe and forms an axial limiting structure with the retaining ring and the clamping plate;

[0009] The core tube is connected to the clamping tube, the core tube and the clamping tube are threaded together, and a retaining ring is formed. The first sealing ring forms a seal with the port of the clamping tube.

[0010] An elastic reset mechanism is connected between the sleeve and the bushing.

[0011] An operating mechanism is provided on the outside of the sleeve. The operating mechanism can drive the clamping tube and the clamping plate to move axially. The clamping plate moves outward from the sleeve. Under the pressure of the oil nozzle connector, the clamping plate expands radially and forms a snap-fit ​​with the oil nozzle connector.

[0012] Preferably, the clamping piece has a bent structure, and multiple clamping pieces are combined to form a fan-ring structure. The bent design of the clamping piece allows it to expand radially when squeezed by the oil nozzle connector and contract to secure the clamping action during resetting.

[0013] Preferably, the elastic reset mechanism is a spring sleeved outside the clamping tube, with one end abutting against the sleeve and the other end abutting against the inner tube of the sleeve. The spring provides a reset force, and after the operating mechanism is released, it pushes the sleeve back to its original position, causing the clamping tube and the oil nozzle connector to retract into the sleeve.

[0014] Preferably, the operating mechanism includes:

[0015] The first connecting piece is fixed to the outer wall of the sleeve;

[0016] The second connecting piece is fixed to the outer wall of the sleeve;

[0017] The pressing handle is sleeved on the outside of the sleeve, with its top end engaging with the first connecting piece and its bottom end being limited by the second connecting piece.

[0018] The top of the pressing handle is provided with a slot that engages with the first connecting piece.

[0019] The pressing handle engages with the first connecting piece via a slot, and when pressed down, it uses the second connecting piece as a fulcrum to drive the sleeve to move axially. The slot ensures the stability of the linkage between the pressing handle and the sleeve.

[0020] Preferably, the other end of the sleeve is provided with an internal thread, which is used to connect to the main oil pipe to realize the connection of the entire oil supply path of the grease gun.

[0021] Preferably, a gap is formed between the oil injection pipe and the clamping plate for clamping the oil nozzle connector. The gap design allows the oil nozzle connector to be radially clamped by the clamping plate after insertion, while simultaneously communicating with the oil injection pipe to achieve oil injection.

[0022] Preferably, the clamping piece is located inside the inner tube of the sleeve. The inner tube of the sleeve restricts the expansion range of the clamping piece, and when the operating mechanism is released, the inner tube forces the clamping piece to retract to secure the oil nozzle connector.

[0023] Preferably, the other end of the sleeve is provided with an anti-winding connector, which is connected to the outer wall of the sleeve and is in communication with the core tube.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] This grease gun connector features an innovative integrated design of the clamping tube and clamping plates, resulting in a compact and secure structure that avoids the need to assemble multiple components during assembly, significantly reducing assembly difficulty. Furthermore, the clamping tube and multiple clamping plates are manufactured using a one-piece molding process, eliminating assembly gaps inherent in traditional split structures and significantly improving overall strength and durability.

[0026] The gap design between the clamping plate and the grease gun connector ensures smooth insertion of the grease nozzle and provides axial restraint through the retaining ring, ensuring precise alignment of the grease gun and the connector and preventing seal failure caused by misalignment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the front sectional view of the grease gun connector.

[0028] Figure 2 This is a schematic diagram of the front view structure of the grease gun connector.

[0029] Figure 3 Diagram showing the connection state before installing an anti-tangle connector on a grease gun connector.

[0030] in:

[0031] 1-Sleeve; 2-Core tube; 3-Sleeve; 301-Inner tube; 4-Clamping tube; 401-Clamping piece; 5-Oil injection pipe; 6-Retaining ring; 7-Spring; 8-Press handle; 801-Slot; 9-First connecting piece; 10-Second connecting piece; 11-First sealing ring; 12-Second sealing ring; 13-Guide groove; 14-Connecting sleeve; 15-Fixing cap; 16-Conduit; 17-Rotating ring; 18-Guide head. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0033] In the description of this utility model, it should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0034] In the description of this utility model, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1:

[0036] Please see Figures 1-2 A grease gun connector, wherein a core tube 2 is fixedly provided at one end of the inner side of the sleeve 1, and one end of the core tube 2 extends outside the sleeve 1 and is fitted with a first sealing ring 11; the other end of the sleeve 1 is provided with an internal thread for threaded connection with the main oil pipe.

[0037] The sleeve 3 has a clamping tube 4 inside. The clamping tube 4 includes multiple integrally connected radially expandable clamping pieces 401. The clamping pieces 401 are configured as a bent structure. After multiple clamping pieces 401 are combined, their end faces can form a fan ring structure.

[0038] The clamping tube 4 is equipped with an oil injection pipe 5 and a retaining ring 6. The retaining ring 6 is fixedly installed inside the clamping tube 4. The retaining ring 6 and the clamping plate 401 block and limit the oil injection pipe 5, allowing the oil injection pipe 5 to slide a short distance between the retaining ring 6 and the clamping plate 401. Since a gap is formed between the oil injection pipe 5 and the clamping plate 401, the oil nozzle connector can be clamped between it and the oil injection pipe 5 by the clamping plate 401, so that the oil nozzle connector and the oil injection pipe 5 are connected.

[0039] The core tube 2 is connected to the clamping tube 4. One end of the core tube 2 is threaded into the inside of the clamping tube 4 and rests against the retaining ring 6. At the same time, the first sealing ring 11 is fitted and connected to the port of the clamping tube 4, forming a sealing structure with the port of the clamping tube 4.

[0040] The sleeve 3 includes an inner tube 301 integrally formed inside. A spring 7 is provided between the sleeve 1 and the sleeve 3. One end of the spring 7 is pressed against the top of the sleeve 1, and the other end is pressed against the top of the inner tube 301. The spring 7 is also sleeved on the outside of one end of the clamping tube 4, and the clamping piece 401 of the clamping tube 4 is located inside the inner tube 301.

[0041] A first connecting piece 9 is fixedly provided on the outer wall of the sleeve 3, and a second connecting piece 10 is fixedly provided on the outer wall of the sleeve 1. One end of both the first connecting piece 9 and the second connecting piece 10 is configured as a hook structure. The pressing handle 8 is sleeved on the outside of the sleeve 3. The slot 801 opened at the top part of the pressing handle 8 forms a hook-type snap connection with the first connecting piece 9, and its bottom part is blocked and restricted by the second connecting piece 10.

[0042] By pressing the handle 8, the handle 8 moves the sleeve 1 and the clamping tube 4 with the help of the second connecting piece 10. At this time, the spring 7 is compressed. Since the core tube 2 is fixed inside the sleeve 1 and one end of it is threaded to the inside of the clamping tube 4, the sleeve 1, the core tube 2 and the clamping tube 4 are connected as one unit. The multiple clamping pieces 401 at one end of the clamping tube 4 move towards the outside of the sleeve 3.

[0043] When the multiple clamping plates 401 move outward from the sleeve 3, the clamping plates 401 can expand radially under the pressure of the oil nozzle connector, so that the oil nozzle connector is locked inside the multiple clamping plates 401; when the pressing handle 8 is released, the spring 7 uses its restoring force to spring the sleeve 1 back to its original position, and the clamping plates 401, along with the oil nozzle connector, return to the inside of the sleeve 3, forming a connection between the oil nozzle connector and the oil injection pipe 5, while the sleeve 3 can cause the clamping plates 401 to contract radially, making the oil nozzle connector more securely locked inside the clamping plates 401.

[0044] Specifically, in use, the user presses the operating mechanism to press the handle 8, causing it to press down with the second connecting piece 10 as the fulcrum. Since the first connecting piece 9 engages with the slot 801 of the pressing handle 8, the downward pressure is transmitted to the sleeve 3, causing the sleeve 1 and the clamping tube 4 to move axially. At this time, the spring 7 is compressed, and the clamping piece 401 at the front end of the clamping tube 4 extends outward from the sleeve 3.

[0045] When the clamping plate 401 extends out of the sleeve 3, its bending structure expands radially under the pressure of the oil nozzle connector, allowing the oil nozzle connector to smoothly enter the gap between the clamping plate 401 and the oil injection pipe 5.

[0046] After releasing the pressing handle 8, the spring 7 rebounds, pushing the sleeve 1 to reset, causing the clamping tube 4 and the oil nozzle connector to retract into the sleeve 3, thus locking the oil nozzle connector.

[0047] The inner tube 301 of the sleeve 3 forces the clamping plate 401 to contract radially, thereby tightly clamping the oil nozzle connector and ensuring stable connection between it and the oil injection pipe 5.

[0048] After the grease nipple connector is securely clamped, grease can be injected through the path of main oil pipe → core tube 2 → clamping tube 4 → oil injection pipe 5 → grease nipple connector.

[0049] Press the handle 8 again to move the clamping plate 401 outward and expand radially, and you can easily pull out the oil nozzle connector.

[0050] After releasing the handle, spring 7 returns to its original position, and clamping plate 401 returns to its initial state, ready for the next use. Example 2:

[0051] Please see Figures 2-3 Based on the above embodiment, the grease gun connector has an anti-winding connector at the other end of the sleeve 1. The anti-winding connector is connected to the outer wall of the sleeve 1 and remains in communication with the core tube 2. The structure of the anti-winding connector and its connection method with the sleeve 1 are as follows:

[0052] The anti-tangle connector includes a connecting sleeve 14, a fixing cap 15, a conduit 16, and a rotating ring 17. One end of the connecting sleeve 14 is provided with an internal thread for connecting the main oil pipe, and the other end passes through the fixing cap 15 and is fixedly connected to the rotating ring 16. The rotating ring 16 is attached to the inner wall of one side of the fixing cap 15 and is fixedly connected to the conduit 16.

[0053] The fixing cap 15 is threaded to the other end of the sleeve 1. The outer wall of the other end of the sleeve 1 is provided with external threads, and the fixing cap 15 is connected to the sleeve 1 by means of internal threads.

[0054] A second sealing ring 12 is fixedly installed at the other end of the casing 1. When the fixing cap 15 is threaded onto the casing 1, the conduit 16 is inserted into the second sealing ring 12 and communicates with the core tube 2. At the same time, when the connecting sleeve 14 is rotated, the rotating ring 17 rotates inside the fixing cap 15, and the conduit 16 rotates inside the second sealing ring 12, thereby achieving the anti-winding of the main pipeline.

[0055] Furthermore, in this embodiment, to facilitate a tight connection and oil flow between the conduit 16 and the core tube 2 after it is inserted into the second sealing ring 12, a guide groove 13 is formed at one end of the core tube 2, and a guide head 18 is integrally connected to one end of the conduit 16. After the conduit 16 is inserted into the second sealing ring 12, the guide head 18 can fit perfectly into the guide groove 13, thereby enabling the conduit 16 to form an oil passage connection with the inside of the core tube 2.

[0056] Furthermore, in this embodiment, in order to enable the rotating ring 17 to rotate inside the fixed cap 15, a gap is provided between the internal thread inside the fixed cap 15 and the rotating ring 17, so as to prevent the rotating ring 17 from being completely stuck on the end of the sleeve 1 after the fixed cap 15 is threadedly connected to the sleeve 1.

[0057] Alternatively, a top ring can be provided at one end of the sleeve 1. When the fixing cap 15 is threaded onto the sleeve 1, it will just press against the top ring, thereby limiting the length of the fixing cap 15 threaded onto the sleeve 1 and preventing the rotating ring 17 from being completely pressed against the end of the sleeve 1.

[0058] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural, procedural, or functional transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. A grease gun connector, characterized by, include: A sleeve (1) has a core tube (2) fixedly installed at one end inside it; The sleeve (3) has an axially movable clamping tube (4) inside, and the clamping tube (4) includes a plurality of radially expandable clamping pieces (401). Oil injection pipe (5), the oil injection pipe (5) is disposed inside the clamping pipe (4); The core tube (2) is connected to the clamping tube (4); An elastic reset mechanism is connected between the sleeve (1) and the sleeve (3); An operating mechanism is provided on the outside of the sleeve (3), which can drive the clamping tube (4) and the clamping plate (401) to move axially.

2. The grease gun connector of claim 1, wherein: The clamping piece (401) has a bent structure, and multiple clamping pieces (401) are combined to form a fan-ring structure.

3. The grease gun connector of claim 1, wherein: The elastic reset mechanism is a spring (7) sleeved on the outside of the clamping tube (4), with one end abutting against the sleeve (1) and the other end abutting against the inner tube (301) of the sleeve (3).

4. The grease gun connector of claim 1, wherein, The operating mechanism includes: The first connecting piece (9) is fixed to the outer wall of the sleeve (3); The second connecting piece (10) is fixed to the outer wall of the sleeve (1); The pressing handle (8) is sleeved on the outside of the sleeve (3), with its top end engaging with the first connecting piece (9) and its bottom end being limited by the second connecting piece (10).

5. The grease gun connector of claim 4, wherein: The top of the pressing handle (8) is provided with a slot (801) that engages with the first connecting piece (9).

6. The grease gun connector of claim 1, wherein: The sleeve (1) has an internal thread at the other end.

7. The grease gun connector of claim 1, wherein: A gap is formed between the oil injection pipe (5) and the clamping plate (401) for clamping the oil nozzle connector.

8. The grease gun connector of claim 1, wherein: The clamping piece (401) is located inside the inner tube (301) of the sleeve (3).

9. The grease gun connector of claim 1, wherein: The other end of the sleeve (1) is provided with an anti-winding connector, which is connected to the outer wall of the sleeve (1) and is in communication with the core tube (2).

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