Lubricating grease centrifugal spraying injection gun

Abstract

The utility model discloses a centrifugal spraying injection gun for lubricating grease, and aims to overcome the defect that the uniformity of lubrication is difficult to maintain in the conventional lubrication mode. The hollow shaft is rotationally connected with the hollow shaft motor, the tube shell is arranged outside the hollow shaft motor, the abutting plate is detachably connected with the top end face of the hollow shaft, a plurality of spraying holes are formed in the position, close to the abutting plate, of the side wall of the hollow shaft, and the bottom end face of the hollow shaft is rotationally connected with a flexible tube for supplying lubricating grease. Uniform spraying lubricating grease is provided in a centrifugal rotation mode, and sufficient lubrication of workpieces is guaranteed on the premise that the using amount of the lubricating grease is controlled.

Description

Technical Field

[0001] This utility model relates to the field of lubrication, and more specifically, it relates to a centrifugal grease spraying injection gun. Background Technology

[0002] Components such as planetary gears, bearings, and reducers need to have friction eliminated as much as possible. The way to eliminate friction is to add lubricating materials. Lubricating materials can reduce the frictional force that occurs when rigid parts are in contact, thereby reducing the wear of parts and the loss of transmitted power.

[0003] The relationship between lubricating materials and lubrication performance is not linear. There's a curve-like relationship where lubricating materials and performance first rise and then fall. The latter part of the curve declines because excessive lubricating material can cause increased operating temperature, leading to sealing problems, increased energy consumption, and is also detrimental to the grease itself. Taking bearings as an example, excessive grease violently churns within the bearing cavity, increasing bearing rotational resistance, temperature, and energy consumption. Increased temperature also accelerates grease oxidation (premature deterioration, shortened service life) and causes the base oil contained in the grease to precipitate out more quickly.

[0004] This over-lubrication is particularly prevalent during the assembly stage. Manually applying grease presents the challenge of accurately controlling the amount applied. Furthermore, maintaining uniform lubrication during assembly is crucial; otherwise, assembly may be hindered, and localized areas may not receive adequate lubrication.

[0005] This application aims to improve upon existing methods by providing a centrifugal grease spraying injection gun that achieves uniform lubrication. Utility Model Content

[0006] This invention overcomes the shortcomings of existing lubrication methods in maintaining uniform lubrication by providing a centrifugal grease spraying injection gun that achieves uniform lubrication of the inner hole through centrifugation.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A centrifugal grease spraying injection gun includes a hollow shaft motor, a hollow shaft rotatably connected to the hollow shaft motor, a tube shell disposed outside the hollow shaft motor, an abutment plate detachably connected to the top surface of the hollow shaft, a plurality of spray holes provided on the side wall of the hollow shaft near the abutment plate, and a flexible tube for supplying grease rotatably connected to the bottom surface of the hollow shaft.

[0009] The injection gun uses a hollow shaft motor to drive the hollow shaft to rotate, and delivers grease through the inner hole of the hollow shaft. The grease is evenly sprayed onto the inner hole of the component or the inner wall of the mounting housing by the "centrifugal force" generated by the rotation of the grease in the hollow shaft.

[0010] This application employs a structure that separates the injection gun body from the grease supply structure, using a flexible hose to deliver the grease and achieving a lightweight gun body. This facilitates operator handling and allows for spraying in multiple directions. To ensure the uniformity of further spraying, especially the coaxiality between the hollow shaft and the inner hole to be sprayed, an abutment plate is provided. This abutment plate adheres to the bottom wall of the component or a nearby positioning wall, ensuring the parallelism of the axes of the hollow shaft and the inner hole.

[0011] Given a constant supply speed and viscosity of lubricating grease and a fixed rotational speed of the hollow shaft, the spraying amount of the spray gun is positively correlated with time. Through manual or automatic control, combined with the operator's knowledge or preset programs, uniform and quantitative spraying can be achieved.

[0012] Preferably, the hollow shaft motor is connected to the tubing via a connecting flange. The hollow shaft motor is threadedly connected to the connecting flange via fasteners arranged along the hollow shaft direction. The connecting flange is threadedly connected to the tubing via fasteners arranged radially along the hollow shaft direction. The connecting flange connects the hollow shaft motor and the tubing, which serves as the outer shell of the injection gun for interaction with the operator.

[0013] Preferably, the tube shell includes a gripping section and a nozzle section, with the cross-sectional area of ​​the nozzle section gradually decreasing along the direction from the gripping section to the nozzle section.

[0014] Preferably, the end of the pointed section is rotatably connected to the hollow shaft via a transition bearing. This structure further increases the support on the hollow shaft, improves its stability, and avoids vibration and instability caused by the rotation center deviating from the shaft's axis due to internal grease displacement.

[0015] Preferably, the tube shell is a cylindrical body with open ends, and the end of the holding section away from the tip section is detachably connected to a connecting cap. The connecting cap has a central hole in the center, which is used for a flexible tube that is rotatably connected to a hollow shaft.

[0016] Preferably, a coaxial rotary joint is connected to the bottom end of the hollow tube. The bottom end of the hollow tube is inserted into one end of the coaxial rotary joint, and the other end of the coaxial rotary joint is connected to the flexible tube. The flexible tube is connected via the coaxial rotary joint, with both the hollow tube and the flexible tube connected to one end of the coaxial rotary joint. The relative rotation of the two tubes is achieved by utilizing the relative rotation capability of the two ends of the coaxial rotary joint. The coaxial rotary joint is an readily available pipe fitting, and the coaxial rotary joint described in this application is also obtained commercially.

[0017] Preferably, the flexible tube connects to a grease supply cylinder, which is equipped with a piston and a driver that moves the piston along the axis of the grease cylinder. The supply cylinder ejects grease via the piston, supplying grease to the grease injection gun.

[0018] Preferably, the hollow shaft has a stepped hole near its top surface. The inner diameter of the hollow shaft's inner hole on the side of the step near the bottom surface is smaller than the inner diameter on the side of the step near the top surface. A guide rod is connected to the abutment plate, and the guide rod is inserted into the hollow shaft, with its end abutting against the step wall. The insertion of the guide rod and the hollow shaft allows for a detachable connection between the hollow shaft and the abutment plate, enabling relative rotation between them. The guide rod facilitates the relative rotation of the abutment plate and the hollow shaft, as well as the adjustment of the spraying position.

[0019] Preferably, a masking tube is fitted onto the hollow shaft, covering part of the spray nozzles. This structure allows for further adjustment of the spray width.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] (1) The uniform spraying of grease is provided by centrifugal rotation, which ensures sufficient lubrication of the workpiece while controlling the amount of grease used;

[0022] (2) The injection gun and the grease supply cylinder are connected by a flexible tube, which reduces the total weight and supports hand-held lubrication of workpieces in different postures at the corresponding angles. Attached Figure Description

[0023] Figure 1 This is a cross-sectional schematic diagram of the injection gun of this utility model;

[0024] Figure 2 This is a cross-sectional schematic diagram of the grease supply cylinder of this utility model;

[0025] Figure 3 This is a schematic diagram of an injection gun ignoring the optical axis and the contact plate;

[0026] In the picture:

[0027] Hollow shaft motor 1, hollow shaft 2, tube shell 3, abutment plate 4, nozzle 5, flexible tube 6, connecting flange 7, gripping section 8, pointed section 9, adapter bearing 10, connecting cover 11, center hole 12, coaxial rotary joint 13, supply cylinder 14, driver 15, piston 16, stepped hole 17, smooth rod 18, cover tube 19. Detailed Implementation

[0028] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0029] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] In this disclosure, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely relational terms determined for the convenience of describing the structural relationship of the various components or elements in this disclosure, and do not specifically refer to any component or element in this disclosure, nor should they be construed as limiting this disclosure.

[0032] In this disclosure, terms such as "fixed connection," "connected," and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this disclosure based on the specific circumstances, and they should not be construed as limitations on this disclosure.

[0033] Example:

[0034] A centrifugal grease spraying injection gun, referring to Figure 1 and Figure 3 As shown, it includes a hollow shaft motor 1, a hollow shaft 2 rotatably connected to the hollow shaft motor 1, and a tube shell 3 disposed outside the hollow shaft motor 1. An abutment plate 4 is detachably connected to the top surface of the hollow shaft 2. Several spray holes 5 are provided on the side wall of the hollow shaft 2 near the abutment plate 4. A flexible tube 6 for supplying lubricating grease is rotatably connected to the bottom surface of the hollow shaft 2.

[0035] The hollow shaft motor 1 is connected to the housing 3 via a connecting flange 7. The hollow shaft motor 1 is threadedly connected to the connecting flange 7 via fasteners arranged along the direction of the hollow shaft 2. The connecting flange 7 is threadedly connected to the housing 3 via fasteners arranged radially along the hollow shaft 2. The connecting flange 7 connects the hollow shaft motor 1 and the housing 3, which serves as the outer shell of the injection gun and interacts with the operator. In some embodiments, the hollow shaft motor 1 extends through the housing 3 to the outside of the housing 3 via a power supply line, or a connection is provided inside the housing 3 to the hollow shaft motor 1.

[0036] The shell 3 includes a holding section 8 and a pointed tip section 9. Along the direction from the holding section 8 to the pointed tip section 9, the cross-sectional area of the pointed tip section 9 gradually decreases. The end of the pointed tip section 9 is rotatably connected to the hollow shaft 2 through a transfer bearing 10. The said structure further increases the support received by the hollow shaft 2, improves the stability of the hollow shaft 2, and avoids the vibration and instability caused by the deviation of the rotation center from the axis of the hollow shaft 2 due to the offset of the internal grease. The shell 3 is a cylindrical body with both ends open. A connection cover 11 is detachably connected to one end of the holding section 8 away from the pointed tip section 9. The specific connection method can be a threaded connection. A central hole 12 is provided in the center of the connection cover 11. The central hole 12 is used to pass through the hollow shaft 2 or a flexible tube 6 rotatably connected to the hollow shaft 2.

[0037] The surface of the shell 3 can also be provided with buttons for controlling the hollow shaft motor 1.

[0038] The bottom end surface of the hollow tube is connected with a coaxial rotary joint 13. The bottom end surface of the hollow tube is inserted into one end of the coaxial rotary joint 13. The other end of the coaxial rotary joint 13 is connected to the flexible tube 6. By connecting the flexible tube 6 through the coaxial rotary joint 13, the hollow tube and the flexible tube 6 are respectively connected to one end of the coaxial rotary joint 13, and the relative rotation of the two tubes is realized by using the ability of the two ends of the coaxial rotary joint 13 to rotate relative to each other. The coaxial rotary joint 13 is a pipe fitting that is easily purchased. The coaxial rotary joint 13 in this application is also obtained by purchasing. It should be noted that in order to prevent the grease inside the hollow tube and the flexible tube 6 from transmitting torque to the flexible tube 6 during the rotation of the hollow tube, causing the flexible tube 6 to rotate and twist, the connection cover 11 can also extend towards the flexible tube 6 and clamp and fix the part of the flexible tube 6 close to the coaxial rotary joint 13, so as to limit the rotation and kinking of the flexible tube 6.

[0039] See Figure 2 As shown, the flexible tube 6 is connected to a supply cylinder 14 for supplying grease. The supply cylinder 14 is provided with a piston 16 and a driver 15 for driving the piston 16 to move along the axis of the grease cylinder. The said supply cylinder 14 pushes out the grease in the form of the piston 16 to provide grease to the said grease injection gun. The surface of the shell 3 is also provided with a control switch for connecting the driver 15 in some embodiments. In some embodiments, the driver 15 and the hollow shaft motor 1 are also connected to a controller. After inputting an instruction to the controller through a switch provided on the shell 3, the driver 15 and the hollow shaft motor 1 are controlled to work according to an algorithm built in the controller.

[0040] The hollow shaft 2 has a stepped hole 17 near its top surface. The inner diameter of the hollow shaft 2 on the side of the step near the bottom surface is smaller than the inner diameter on the side of the step near the top surface. A guide rod 18 is connected to the abutment plate 4. The guide rod 18 is inserted into the hollow shaft 2, and its end abuts against the step wall. The insertion of the guide rod and the hollow shaft 2 allows for a detachable connection between them, enabling relative rotation. The guide rod facilitates the relative rotation of the abutment plate 4 and the hollow shaft 2, as well as the adjustment of the spraying position.

[0041] A masking tube 19 is fitted onto the hollow shaft 2, covering part of the spray nozzle 5. This structure allows for further adjustment of the spray width. The masking tube 19 and the hollow shaft 2 are connected by an interference fit. To prevent relative rotation between the hollow shaft 2 and the masking tube 19, a guide groove can be provided on the hollow shaft 2, and a guide strip can be provided on the masking tube 19, allowing the guide strip to be inserted into the guide groove.

[0042] The injection gun uses a hollow shaft motor 1 to drive the hollow shaft 2 to rotate, and delivers grease through the inner hole of the hollow shaft 2. The grease is evenly sprayed onto the inner hole of the component or the inner wall of the mounting housing by the centrifugal force generated by the rotation of the grease in the hollow shaft 2.

[0043] This application employs a structure that separates the injection gun body from the grease supply structure, using a flexible hose to provide grease and achieving a lightweight gun body. This facilitates operator handling and allows for spraying in multiple directions. To ensure the uniformity of further spraying, especially the coaxiality between the hollow shaft 2 and the axis of the inner hole to be sprayed, an abutment plate 4 is provided. The abutment plate 4 adheres to the bottom wall of the component or a nearby positioning wall, ensuring the parallelism of the axes of the hollow shaft 2 and the inner hole.

[0044] When the speed and viscosity of the grease supply and the rotational speed of the hollow shaft 2 are constant, the spraying amount of the spray gun is positively correlated with time. Through manual or automatic control, combined with the operator's knowledge or preset program, uniform and quantitative spraying can be achieved.

[0045] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A centrifugal grease spraying injection gun, characterized in that, It includes a hollow shaft motor, a hollow shaft rotatably connected to the hollow shaft motor, a tube shell disposed outside the hollow shaft motor, an abutment plate detachably connected to the top surface of the hollow shaft, a number of spray holes provided on the side wall of the hollow shaft near the abutment plate, and a flexible tube for supplying lubricating grease rotatably connected to the bottom surface of the hollow shaft.

2. The centrifugal grease spraying injection gun according to claim 1, characterized in that, The hollow shaft motor is connected to the tube shell via a connecting flange. The hollow shaft motor is threaded to the connecting flange via fasteners set along the direction of the hollow shaft. The connecting flange is threaded to the tube shell via fasteners set along the radial direction of the hollow shaft.

3. The centrifugal grease spraying injection gun according to claim 2, characterized in that, The tube shell includes a grip section and a nozzle section. Along the direction from the grip section to the nozzle section, the cross-sectional area of ​​the nozzle section gradually decreases.

4. A centrifugal grease spraying injection gun according to claim 3, characterized in that, The end of the pointed section is rotatably connected to the hollow shaft via a transition bearing.

5. A centrifugal grease spraying injection gun according to claim 3, characterized in that, The tube shell is a cylindrical body with open ends. The end of the holding section away from the tip section is detachably connected to a connecting cap. The center of the connecting cap has a central hole, which is used for a flexible tube that is rotatably connected to a hollow shaft.

6. A centrifugal grease spraying injection gun according to claim 1, characterized in that, The bottom end of the hollow tube is connected to a coaxial rotary joint. The bottom end of the hollow tube is inserted into one end of the coaxial rotary joint, and the other end of the coaxial rotary joint is connected to the flexible tube.

7. A centrifugal grease spraying injection gun according to claim 1, characterized in that, The flexible tube is connected to a grease supply cylinder, which is equipped with a piston and a driver that drives the piston to move along the axis of the grease cylinder.

8. A centrifugal grease spraying injection gun according to claim 1, characterized in that, The hollow shaft has a stepped hole near the top surface. The inner diameter of the hollow shaft on the side of the step near the bottom surface is smaller than the inner diameter on the side of the step near the top surface. A guide rod is connected to the abutment plate. The guide rod is inserted into the hollow shaft and its end abuts against the step wall.

9. A centrifugal grease spraying injection gun according to any one of claims 1 to 8, characterized in that, A cover tube is fitted onto the hollow shaft, and the cover tube is fitted onto the hollow shaft and covers part of the spray hole.

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