Self-locking oil gun

Abstract

The utility model provides a self-locking oil injection gun, and aims to solve the technical problem that the oil injection gun is easy to fall off from an oil injection joint. The utility model aims at providing a self-locking oil injection gun, which is used for injecting oil into mechanical equipment through an oil injection joint, and comprises a gun body, a self-locking oil injection device, a self-locking oil injection device, an oil injection device and an oil injection device, and is characterized in that the gun body comprises a tubular muzzle which can be inserted into the oil injection joint; the sleeve assembly comprises a connecting part and a mounting part which are in sliding fit in the circumferential direction, the connecting part is connected with the muzzle, and the mounting part is used for positioning the oil injection connector; the elastic piece is arranged between the connecting part and the mounting part; according to the oil injection gun, the sleeve assembly is arranged on the muzzle of the gun body, the muzzle is connected with the oil injection connector, and therefore the oil injection gun can be stably connected to the oil injection connector, and the oil injection gun can be stably connected to the oil injection connector. Therefore, the oil injection gun is prevented from falling off from the oil injection joint.

Description

TECHNICAL FIELD

[0001] The utility model relates to an oil injection gun, in particular to a self-locking oil injection gun. BACKGROUND

[0002] At present, the internal lubricating oil is generally used for the lubrication and heat dissipation of mechanical parts of air conditioner compressor. Because the lubricating oil will gradually deteriorate in the long-term use process, the air conditioning equipment must be implemented lubricating oil replacement maintenance operation after a certain period of operation. In this process, the oil injection gun as the core tool is widely used to pour new oil into the compressor copper pipe.

[0003] The existing oil injection gun for air conditioner compressor on the market generally adopts a straight insertion type oil injection structure design, and its technical scheme is that the operator needs to directly insert the gun mouth at the front end of the oil injection gun into the oil injection port of the compressor oil injection connector (copper pipe), and realizes oil pouring by manually pressing the handle of the oil injection gun. However, the traditional structure has the following defects:

[0004] Firstly, there is no reliable mechanical locking device between the oil injection gun and the oil injection connector, and the gun mouth and the oil injection port are easily separated accidentally due to equipment vibration or personnel misoperation during oil injection, which causes oil leakage and pollutes the working environment, and may even cause equipment failure due to insufficient lubrication;

[0005] Secondly, the oil injection port of the oil injection gun is designed in a horizontal or inclined non-vertical manner, and the operator must continuously hold the oil injection gun with his hand to maintain the alignment state of the gun mouth and the oil injection port during operation, which not only increases the labor intensity, but also significantly reduces the operation safety and efficiency in high-altitude operation or narrow space maintenance scene. TECHNICAL SOLUTION

[0006] In view of the technical problem that the oil injection gun is easy to fall off from the oil injection connector, the utility model provides a self-locking oil injection gun, which connects the gun mouth and the oil injection connector by setting a sleeve assembly on the gun mouth, so that the oil injection gun can be stably connected to the oil injection connector to avoid falling off from the oil injection connector.

[0007] The technical scheme of the utility model is as follows:

[0008] A self-locking oil injection gun for injecting oil into a mechanical equipment through an oil injection connector, the oil injection gun comprising:

[0009] A gun body comprising a tubular gun mouth which can be inserted into the oil injection connector;

[0010] A sleeve assembly comprising a connecting part and a mounting part which are circumferentially slidably connected, the connecting part being connected to the gun mouth, and the mounting part being positioned to the oil injection connector;

[0011] An elastic member arranged between the connecting part and the mounting part;

[0012] A limiting assembly is arranged on the connecting part and linked with the mounting part, and the limiting assembly can be clamped with the clamping part of the oil injection connector through radial movement.

[0013] Optionally, the connecting part comprises a connecting tube, and the mounting part comprises a supporting tube sleeved on the connecting tube.

[0014] The elastic member is arranged between the connecting tube and the supporting tube.

[0015] Optionally, one end of the connecting tube is connected with the gun port, and the other end is provided for the oil injection connector to be inserted.

[0016] The inner wall of the supporting tube acts on the limiting assembly.

[0017] The limiting assembly is arranged on the tube of the connecting tube.

[0018] Optionally, the connecting tube is circumferentially provided with a plurality of clamping grooves, and the limiting assembly comprises a limiting body movably arranged in each clamping groove.

[0019] Optionally, the limiting body is spherical, and the inner side of the end of the supporting tube is provided with a bevel for guiding the limiting body to move radially in the clamping groove.

[0020] Optionally, one end of the connecting tube is a support structure with outward expansion, and one end of the supporting tube has a positioning structure with inward protrusion.

[0021] The connecting tube and the supporting tube form a circumferential sliding fit structure through the support structure and the positioning structure.

[0022] The elastic member is arranged between the support structure and the positioning structure.

[0023] Optionally, the elastic member is a spring sleeved on the connecting tube, and the two ends are respectively abutted on the support structure and the positioning structure.

[0024] Optionally, the connecting tube and the gun port are connected through matching internal and external threads.

[0025] Optionally, the gun port insertion end of the oil injection connector is an open structure, and the clamping part is located behind the open end.

[0026] The clamping part is a radial protruding structure of the oil injection connector, and when the limiting assembly is clamped with the clamping part, the elastic member is in a free state and forms axial locking.

[0027] Optionally, one end of the supporting tube is externally provided with an arc-shaped trigger, and the trigger can drive the supporting tube to move axially along the connecting tube.

[0028] Compared with the prior art, the oil injection gun has the advantages that

[0029] In use of the oil injection gun, first, the sleeve assembly is installed on the gun mouth of the gun body, the connecting portion is connected with the gun mouth, then the oil injection connector is inserted into the connecting portion, so that the gun mouth is inserted into the oil injection connector in the connecting portion.

[0030] Through the technical scheme, the gun mouth of the oil injection gun can be stably connected with the oil injection connector conveniently and quickly, so that the oil injection gun is prevented from falling off from the oil injection connector. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application;

[0033] Figure 2 It is an enlarged schematic diagram of the sleeve assembly. DETAILED DESCRIPTION

[0034] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0035] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0036] The embodiments of the present application will be described in detail below with reference to the drawings.

[0037] Embodiment:

[0038] Referring to Figure 1 and Figure 2 The embodiment discloses a self-locking oil injection gun, which can inject lubricating oil into a mechanical equipment by injecting the lubricating oil into an oil injection joint 10. The oil injection gun comprises a gun body 20, a sleeve assembly 30, an elastic member 40 and a limiting assembly 50. The gun body 20 comprises a gun port 21, and an oil channel is arranged in the gun body 20 and communicates with the gun port 21. The gun port 21 of the gun body 20 can be inserted into the oil injection joint 10. The sleeve assembly 30 is connected to the gun port 21 and the oil injection joint 10 and forms a stable connection relationship between the gun port 21 and the oil injection joint 10.

[0039] Specifically, the gun port 21 is in a tubular structure, and the sleeve assembly 30 comprises a connecting part and a mounting part. One end of the connecting part is detachably connected to the gun port 21, and the oil injection joint 10 can be inserted into the other end of the connecting part so that the gun port 21 is inserted into the oil injection joint 10. The mounting part is axially slidably connected to the connecting part, and the mounting part is used for positioning the oil injection joint 10.

[0040] The elastic member 40 is arranged between the connecting part and the mounting part, and the elastic member 40 has a driving tendency for driving the mounting part to move relative to the connecting part. In addition, the limiting assembly 50 is arranged on the connecting part and is connected to the mounting part. Under the action of the mounting part, the limiting assembly 50 can move radially in the connecting part.

[0041] In addition, during the process of inserting the oil injection joint 10 into the connecting part, the mounting part needs to press the elastic member 40 to make the elastic member 40 obtain elastic potential energy. When the oil injection joint 10 is completely inserted into the connecting part and is connected to the gun port 21, the mounting part is released, and the mounting part is driven to slide under the action of the elastic member 40. At this time, the mounting part drives the limiting assembly 50 to move and makes the limiting assembly 50 be clamped with the clamping part 11 of the oil injection joint 10, so as to limit the position of the oil injection joint 10.

[0042] When the oil injection gun is used, first, the sleeve assembly 30 is arranged on the gun port 21 of the gun body 20, so that the connecting part is connected to the gun port 21. Then, the oil injection joint 10 is inserted into the connecting part, so that the gun port 21 is inserted into the oil injection joint 10 in the connecting part. Through the linkage of the mounting part and the limiting assembly 50, the limiting assembly 50 is moved in the radial direction, and the oil injection joint 10 is locked by the limiting assembly 50. Through the technical scheme, the gun port 21 of the oil injection gun can be stably connected to the oil injection joint 10, so as to avoid that the oil injection gun is separated from the oil injection joint 10.

[0043] In one specific embodiment,

[0044] The connecting portion comprises a connecting pipe 31, which is in a tubular structure and has a through hole penetrating through both ends. The mounting portion comprises a supporting pipe 32, which is also in a tubular structure and has an inner diameter larger than that of the connecting pipe 31.

[0045] The supporting pipe 32 is sleeved on the connecting pipe 31 and coaxially arranged with the connecting pipe 31. The elastic member 40 is arranged between the connecting pipe 31 and the supporting pipe 32. The limiting assembly 50 is arranged on the connecting pipe 31, and the inner wall of the supporting pipe 32 can directly act on the limiting assembly 50 to drive the limiting assembly 50 to move in the radial direction.

[0046] During use, one end of the connecting pipe 31 is detachably connected with the gun port 21, and the other end of the connecting pipe 31 is for inserting the oil injection connector 10. The limiting assembly 50 is driven to move by the supporting pipe 32, so as to limit the position of the oil injection connector 10.

[0047] Specifically, one end of the connecting pipe 31 has a structure protruding inwardly, and a connecting hole with an inner diameter equal to the diameter of the gun port 21 is formed at this end of the connecting pipe 31. When the gun port 21 is mounted in the connecting hole, the end of the gun port 21 extends into the interior of the connecting pipe 31, and there is a gap between the outer side of the gun port 21 and the inner side of the connecting pipe 31, so that the end of the gun port 21 can be inserted into the oil injection connector 10.

[0048] In another specific embodiment,

[0049] A plurality of clamping grooves 33 are arranged on the circumference of the connecting pipe 31, and the clamping grooves 33 are circular. The limiting assembly 50 comprises a plurality of limiting bodies 51.

[0050] Specifically, one limiting body 51 is movably arranged in each clamping groove 33. The limiting body 51 has a size larger than the wall thickness of the connecting pipe 31, so that the limiting body 51 can intrude into the interior space of the connecting pipe 31, so that the limiting body 51 can directly abut against the clamping portion 11 of the oil injection connector 10, thereby limiting the position of the oil injection connector 10.

[0051] Preferably, the limiting body 51 is in a spherical structure, the clamping groove 33 is in a circular structure, the diameter of the limiting body 51 is greater than or equal to the wall thickness of the connecting pipe 31, and in addition, the diameter of the one end of the clamping groove 33 on the inner side of the connecting pipe 31 is smaller than the diameter of the limiting body 51, so as to avoid the limiting body 51 from falling out of the clamping groove 33.

[0052] The limiting body 51 is in rolling contact with the inner wall of the supporting pipe 32. When the supporting pipe 32 moves on the connecting pipe 31, the supporting pipe 32 can completely press the limiting body 51 into the clamping groove 33, and a part of the limiting body 51 intrudes into the interior of the connecting pipe 31.

[0053] When a part of the limiting body 51 invades into the connecting pipe 31, the effective inner diameter of the connecting pipe 31 is reduced to be equal to or less than the outer diameter of the clamping part 11 of the oil injection joint 10.

[0054] In addition, in order to make the limiting body 51 move well in the clamping groove 33 during the movement of the supporting pipe 32, the bevel 34 is arranged inside one end of the supporting pipe 32 to form a slope structure inside the end of the supporting pipe 32.

[0055] In another specific embodiment,

[0056] One end of the connecting pipe 31 is provided with a supporting structure 36 which expands outward, the supporting structure 36 can support a tubular member arranged on the end of the connecting pipe 31, the supporting structure 36 is circular, the outer diameter of the supporting structure 36 is equal to the inner diameter of the supporting pipe 32, and the supporting structure 36 is arranged on the inner wall of the supporting pipe 32 in a sliding manner.

[0057] One end of the supporting pipe 32 is provided with a positioning structure 35 which protrudes inward, the inner side of the positioning structure 35 is a circular channel, the positioning structure 35 can embed a tubular member arranged inside the supporting pipe 32, the inner diameter of the positioning structure 35 is equal to the outer diameter of the connecting pipe 31, and the connecting pipe 31 is arranged inside the positioning structure 35.

[0058] The connecting pipe 31 and the supporting pipe 32 form a circumferential sliding fit structure through the supporting structure 36 and the positioning structure 35, generally, the supporting structure 36 and the positioning structure 35 are arranged at two ends of the connecting pipe 31 respectively, and there is a gap between the supporting structure 36 and the positioning structure 35, and the elastic member 40 is arranged in the gap.

[0059] The bevel 34 on the supporting pipe 32 is arranged inside one end of the positioning structure 35.

[0060] In this embodiment, the supporting structure 36 and the positioning structure 35 are arranged to provide a space for arranging the elastic member 40 between the supporting pipe 32 and the connecting pipe 31, and make the supporting pipe 32 and the connecting pipe 31 include a coaxial structure feature.

[0061] Preferably, a rubber sealing ring is arranged at the contact position between the connecting pipe 31 and the oil injection joint 10 to prevent the lubricating oil from leaking.

[0062] In another specific embodiment,

[0063] The elastic member 40 is a spring, the spring is arranged on the connecting pipe 31, and the two ends of the spring abut against the supporting structure 36 and the positioning structure 35 respectively. Generally, when the spring is in a free state, there is a gap between the supporting structure 36 and the positioning structure 35, and at this time, the positioning structure 35 completely covers the clamping groove 33, and the limiting body 51 is completely pressed into the clamping groove 33, so that a part of the clamping groove 33 is embedded into the inside of the connecting pipe 31.

[0064] In another specific embodiment,

[0065] The connecting pipe 31 and the gun port 21 are connected by matching internal and external threads, and through the threaded connection, quick installation and disassembly can be achieved.

[0066] In another specific embodiment,

[0067] The gun port 21 of the oil filling connector 10 is inserted into an open structure, and the clamping part 11 is located behind the open structure, wherein the outer diameter of the open structure is less than or equal to the inner diameter of the connecting pipe 31, and greater than the outer diameter of the gun port 21.

[0068] The clamping part 11 is a radial protruding structure of the oil filling connector 10, when the limiting assembly 50 is clamped with the clamping part 11, the elastic member 40 is in a free state and forms an axial lock.

[0069] The end of the oil filling connector 10 changes in diameter to cooperate with the limiting body 51, thereby fixing the position of the oil filling connector 10.

[0070] In another specific embodiment,

[0071] The outer end of the support pipe 32 is provided with an arc-shaped trigger 37, which can drive the support pipe 32 to move axially along the connecting pipe 31, so that the trigger 37 drives the support pipe 32 to compress the elastic member 40, so that the elastic member 40 obtains elastic potential energy.

[0072] According to the above embodiments, the working process of the present application can be obtained as follows:

[0073] First, the gun port 21 is installed at one end of the connecting pipe 31 through threaded cooperation, at this time the end of the gun port 21 is suspended inside the connecting pipe 31. Then pull the support pipe 32 through the trigger 37, so that the positioning structure 35 on the support pipe 32 compresses the spring, and at this time, the support pipe 32 moves backward relative to the limiting body 51. When the bevel 34 on the support pipe 32 moves to the limiting body 51, the radial pressure on the limiting body 51 is released, the oil filling connector 10 is inserted into the other end of the connecting pipe 31, and continuously inserted into the inside of the connecting pipe 31 until the end of the connecting pipe 31 contacts with the inside protruding structure, at this time, the gun port 21 is also inserted into the oil filling connector 10. Finally, the trigger 37 is released, the support pipe 32 moves under the action of the spring, so that the support structure 36 and the positioning structure 35 move away from each other, so that the positioning structure 35 in the support pipe 32 presses the limiting body 51, so that part of the limiting body 51 invades the connecting pipe 31, and then the limiting body 51 is clamped with the clamping part 11 of the oil filling connector 10.

[0074] When the oil injection connector 10 needs to be taken out from the connecting pipe 31, the trigger 37 is pulled again. Experiments show that the structure can be locked in 0.5 seconds, the anti-pulling force reaches 50N, and the structure can still be reliably locked under 2MPa oil pressure after pressure test, and still has no wear after 500 repeated operations.

[0075] The above-described embodiments only express the specific implementation of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A self-locking oil gun for injecting oil into a mechanical device through an oil injection joint, characterized by, The oil injection gun comprises: a gun body including a tubular gun mouth insertable into the oil injection connector; a sleeve assembly including a connecting portion and a mounting portion in circumferential sliding fit, the connecting portion connecting the gun mouth, and the mounting portion positioning the oil injection connector; a resilient member provided between the connecting portion and the mounting portion; a limiting assembly provided on the connecting portion and linked with the mounting portion, the limiting assembly being radially movable to be clamped with a clamping portion of the oil injection connector.

2. The self-locking oil injection gun according to claim 1, wherein: the connecting portion includes a connecting tube, and the mounting portion includes a support tube sleeved on the connecting tube; the resilient member is provided between the connecting tube and the support tube.

3. The self-locking oil gun according to claim 2, characterized in that one end of the connecting tube is connected with the gun mouth, and the other end is provided for the oil injection connector to be inserted; an inner wall of the support tube acts on the limiting assembly; the limiting assembly is provided on the connecting tube.

4. The self-locking oil gun according to claim 2, wherein a plurality of clamping grooves are circumferentially provided on the connecting tube, and the limiting assembly includes a limiting body movably provided in each clamping groove.

5. The self-locking oil gun according to claim 4, wherein the limiting body is spherical, and an inner side of an end of the support tube is provided with a bevel for guiding the limiting body to move radially in the clamping groove.

6. The self-locking oil gun according to claim 2, wherein one end of the connecting tube is provided with a support structure outwardly expanding, and one end of the support tube is provided with a positioning structure inwardly protruding; the connecting tube and the support tube form a circumferential sliding fit structure through the support structure and the positioning structure; the resilient member is provided between the support structure and the positioning structure.

7. The self-locking oil injection gun according to claim 6, wherein: the resilient member is a spring sleeved on the connecting tube, and two ends thereof are respectively abutted on the support structure and the positioning structure.

8. The self-locking oil gun according to claim 2, wherein, the connecting tube and the gun mouth are connected through matching internal threads and external threads.

9. The self-locking oil injection gun according to claim 7, wherein: an insertion end of the gun mouth of the oil injection connector is an open structure, and the clamping portion is located behind the open end; the clamping portion is a radial protruding structure of the oil injection connector, when the limiting assembly is clamped with the clamping portion, the resilient member is in a free state and forms axial locking.

10. The self-locking oil filler gun according to any one of claims 2-9, characterized in that an arc-shaped trigger is provided on an outer portion of one end of the support tube, and the trigger can drive the support tube to move axially along the connecting tube.

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