Containers, lubricant dispensers, grease guns, connecting components

Abstract

The present invention provides a container, a lubricant supply device, a grease gun, and a connecting member. The container (1) of the present invention comprises: a bag (1a, 1b, 1c) filled with a lubricant composition having a consistency of 300 to 450 and sealed, the bag being formed of a film-like material; and a container mouth (1g) fixed to the bag (1a, 1b, 1c).

Description

Technical Field

[0001] The invention relates to a container, a lubricant supplier, a grease gun and a connecting component. Background Art

[0002] The interior of a speed reducer is composed of multiple sliding and rolling elements. When torque is applied to the input side, it is decelerated and a higher torque is transmitted to the output side. These speed reducers are widely used in transportation applications such as railways, aviation, and shipping, as well as in industrial fields such as robotics.

[0003] One of the performance requirements of a speed reducer is that the output torque remain constant and stable over a long period of time. In particular, speed reducers installed in the joints of robots are required to be able to perform precise movements.

[0004] However, the shape of the internal components of the speed reducer after operation becomes noticeable, particularly at high temperatures, due to damage to the metal contact portion caused by steel-on-steel sliding, for example. This shortens the life of the speed reducer.

[0005] In addition, as the use environment of speed reducers expands, speed reducers are required to be used in cold regions, etc. In cold regions, at low temperatures such as winter, the input side torque (starting torque) increases, and the starting efficiency of the speed reducer decreases.

[0006] Lubricating oil or grease has been proposed to improve the durability of the speed reducer at high temperatures and also to reduce the input torque of the speed reducer at low temperatures.

[0007] To supply grease to the speed reducer, a grease gun for filling and pressing grease in is sometimes used, as described in Patent Document 1. Alternatively, a bellows-type (accordion-type) refill container is known, as described in Patent Document 2.

[0008] When handling a small amount of grease, a resin bellows container is sometimes used, and a dedicated gun is used to inject the grease into the reducer.

[0009] Prior art literature

[0010] Patent Literature

[0011] Patent Document 1: Japanese Patent Application Laid-Open No. 2006-336664

[0012] Patent Document 2: Japanese Patent Application Laid-Open No. 2017-032103 Summary of the Invention

[0013] Problems to be solved by the invention

[0014] However, refill-type grease guns have poor operability, a possibility of grease remaining in the gun, and poor efficiency, and there is a demand for improvements in these aspects.

[0015] Furthermore, the refill container described in Patent Document 2, while designed for small doses, suffers from the problem of grease leaking from the lid. Furthermore, long-term storage in bellows containers requires countermeasures such as forming a bellows-shaped (accordion-shaped) layer to suppress leakage, depending on the grease composition. This increases costs.

[0016] The present invention aims to achieve the following object: to provide a structure for easily replacing grease in a speed reducer by using a grease gun, a lubricant feeder, and a container that can suppress grease leakage and have a simple and inexpensive structure.

[0017] Solutions for solving problems

[0018] A container according to one embodiment of the present invention comprises: a bag filled with a lubricant composition having a consistency of 300 to 450 and sealed, the bag being formed of a film-like material; and a container mouth fixed to the bag.

[0019] The container according to one technical solution of the present invention can improve the life of the reducer at high temperatures and can suppress the increase of the input torque at low temperatures. In addition, the container according to one technical solution of the present invention can suppress the leakage of the lubricant composition (grease) that can increase the starting efficiency of the reducer, and can be set to a small dose. Therefore, the container according to one technical solution of the present invention makes it easy to store the lubricant composition for a long time (can be stored for a long time). In addition, the container according to one technical solution of the present invention can be accommodated in the barrel of a grease gun, so it can be easily connected to the reducer without transferring the grease. As a result, the operating process can be reduced and the operating time can be set to a shorter time, and the operation of injecting grease into the reducer to replace the grease can be easily and cheaply performed.

[0020] A container according to one embodiment of the present invention comprises a bag containing a material having a kinematic viscosity of 20 mm at 40°C. 2 / s~150mm 2 / s of a lubricant composition of a base oil and sealed, the bag being formed of a film-like material; and a container mouth fixed to the bag.

[0021] The container according to one technical solution of the present invention can improve the life of the reducer at high temperatures and can suppress the increase of the input torque at low temperatures. In addition, the container according to one technical solution of the present invention can suppress the leakage of the lubricant composition that can increase the starting efficiency of the reducer and can be set to a small dose. Therefore, the container according to one technical solution of the present invention makes it easy to store the lubricant composition for a long time (can be stored for a long time). In addition, the container according to one technical solution of the present invention can be accommodated in the barrel of a grease gun, so it can be easily connected to the reducer without transferring the grease. As a result, the operating process can be reduced and the operating time can be set to a shorter time, and the operation of injecting grease into the reducer to replace the grease can be easily and cheaply performed.

[0022] A container according to one embodiment of the present invention comprises: a bag filled with a lubricant composition containing 50 to 99 wt % of a base oil and sealed, the bag being formed of a film-like material; and a container mouth fixed to the bag.

[0023] The container according to one technical solution of the present invention can improve the life of the reducer at high temperatures and can suppress the increase of the input torque at low temperatures. In addition, the container according to one technical solution of the present invention can suppress the leakage of the lubricant composition that can increase the starting efficiency of the reducer and can be set to a small dose. Therefore, the container according to one technical solution of the present invention makes it easy to store the lubricant composition for a long time (can be stored for a long time). In addition, the container according to one technical solution of the present invention can be accommodated in the barrel of a grease gun, so it can be easily connected to the reducer without transferring the grease. As a result, the operating process can be reduced and the operating time can be set to a shorter time, and the operation of injecting grease into the reducer to replace the grease can be easily and cheaply performed.

[0024] A container according to one embodiment of the present invention comprises a bag filled with a lubricant composition and sealed, the bag being formed of a film-like material, wherein the lubricant composition has a consistency of 300 to 450 and contains a kinematic viscosity of 20 mm at 40°C. 2 / s~150mm 2 / s of base oil, wherein the proportion of the base oil is 50% to 99% by weight; and a container mouth, which is bonded and fixed to the bag.

[0025] The container according to one technical solution of the present invention can improve the life of the reducer at high temperatures and can suppress the increase of the input torque at low temperatures. In addition, the container according to one technical solution of the present invention can suppress the leakage of the lubricant composition that can increase the starting efficiency of the reducer and can be set to a small dose. Therefore, the container according to one technical solution of the present invention makes it easy to store the lubricant composition for a long time (can be stored for a long time). In addition, the container according to one technical solution of the present invention can be accommodated in the barrel of a grease gun, so it can be easily connected to the reducer without transferring the grease. As a result, the operating process can be reduced and the operating time can be set to a shorter time, and the operation of injecting grease into the reducer to replace the grease can be easily and cheaply performed.

[0026] A lubricant dispenser according to one embodiment of the present invention comprises: a lubricant composition having a consistency of 300 to 450; a bag filled with the lubricant composition and sealed, the bag being formed of a film material; and a container nozzle fixed to the bag.

[0027] The lubricant feeder according to another technical solution of the present invention can improve the life of the reducer at high temperatures and can suppress the increase of the input torque at low temperatures. In addition, the lubricant feeder according to another technical solution of the present invention can suppress the leakage of the lubricant composition (grease) that can increase the starting efficiency of the reducer, and can be set to a small dose. Therefore, the lubricant feeder according to another technical solution of the present invention makes it easy to store the lubricant composition for a long time (can be stored for a long time). In addition, the lubricant feeder according to another technical solution of the present invention can be easily connected to the reducer without transferring the grease. As a result, the operation process can be reduced and the operation time can be set to be shorter, and the operation of injecting and replacing the grease into the reducer can be easily and cheaply performed.

[0028] Another embodiment of the present invention provides a lubricant feeder having a lubricant composition having a kinematic viscosity of 20 mm at 40°C. 2 / s~150mm 2 / s of base oil; a bag for filling the lubricant composition and sealing it, the bag being formed of a film-like material; and a container mouth fixed to the bag.

[0029] The lubricant feeder according to another technical solution of the present invention can improve the life of the reducer at high temperatures and can suppress the increase in input torque at low temperatures. In addition, the lubricant feeder according to another technical solution of the present invention can suppress the leakage of the lubricant composition that can increase the starting efficiency of the reducer and can be set to a small dose. Therefore, the lubricant feeder according to another technical solution of the present invention makes it easy to store the lubricant composition for a long time (can be stored for a long time). In addition, the lubricant feeder according to another technical solution of the present invention can be easily connected to the reducer without transferring grease. As a result, the operating process can be reduced and the operating time can be set to be shorter, and the operation of injecting grease into the reducer to replace the grease can be easily and cheaply performed.

[0030] A lubricant dispenser according to another embodiment of the present invention comprises: a lubricant composition containing 50% to 99% by weight of a base oil; a bag filled with the lubricant composition and sealed, the bag being formed of a film-like material; and a container nozzle fixed to the bag.

[0031] The lubricant feeder according to another technical solution of the present invention can improve the life of the reducer at high temperatures and can suppress the increase in input torque at low temperatures. In addition, the lubricant feeder according to another technical solution of the present invention can suppress the leakage of the lubricant composition that can increase the starting efficiency of the reducer and can be set to a small dose. Therefore, the lubricant feeder according to another technical solution of the present invention makes it easy to store the lubricant composition for a long time (can be stored for a long time). In addition, the lubricant feeder according to another technical solution of the present invention can be easily connected to the reducer without transferring grease. As a result, the operating process can be reduced and the operating time can be set to be shorter, and the operation of injecting grease into the reducer to replace the grease can be easily and cheaply performed.

[0032] A lubricant feeder according to one embodiment of the present invention comprises a lubricant composition having a consistency of 300 to 450 and a kinematic viscosity of 20 mm at 40°C. 2 / s~150mm 2 / s of base oil, the ratio of the base oil is 50 wt% to 99 wt%; a bag for filling the lubricant composition and sealing it, the bag being formed of a film material; and a container mouth, which is adhesively fixed to the bag.

[0033] The lubricant feeder according to one technical solution of the present invention can improve the life of the reducer at high temperatures and can suppress the increase in input torque at low temperatures. In addition, the lubricant feeder according to one technical solution of the present invention can suppress the leakage of the lubricant composition that can increase the starting efficiency of the reducer and can be set to a small dose. Therefore, the lubricant feeder according to one technical solution of the present invention makes it easy to store the lubricant composition for a long time (can be stored for a long time). In addition, the lubricant feeder according to one technical solution of the present invention can be easily connected to the reducer without transferring grease. As a result, the operating process can be reduced and the operating time can be set to be shorter, and the operation of injecting grease into the reducer to replace the grease can be easily and cheaply performed.

[0034] A grease gun according to another embodiment of the present invention comprises: a barrel portion that houses a container having a bag filled with and sealed with a lubricant composition having a viscosity of 300 to 450, the bag being formed from a film-like material; and a container nozzle fixed to the bag; a pressing portion that presses the container within the barrel portion to extrude the lubricant composition; and a connecting member connected to the container nozzle and having a through-hole through which the lubricant composition passes.

[0035] The grease gun according to another technical solution of the present invention can improve the life of the reducer at high temperatures and can suppress the increase of input torque at low temperatures. In addition, the grease gun according to another technical solution of the present invention can suppress the leakage of the lubricant composition that can increase the starting efficiency of the reducer and can be set to a small dose. Therefore, the grease gun according to another technical solution of the present invention can easily perform the operation of injecting grease into the reducer by using a container (bag container) that can easily and cheaply store the lubricant composition (grease) for a long time. As a result, when replacing the grease filled in the reducer, the grease gun can be easily connected to the reducer without transferring the grease to another container, thereby suppressing the leakage of the lubricant composition (grease) to the surrounding of the connecting member. Therefore, the grease gun according to another technical solution of the present invention can simplify the operation process in the connection operation and injection operation and shorten the operation time, and can perform the operation of injecting and replacing grease into the reducer cheaply.

[0036] Another embodiment of the present invention provides a grease gun comprising: a barrel, a container, and a bag containing a grease having a kinematic viscosity of 20 mm at 40°C; 2 / s~150mm 2 / s of base oil and sealed, the bag being formed of a film-like material; and a container mouth fixed to the bag; a pressing portion pressing the container in the barrel to squeeze out the lubricant composition; and a connecting member connected to the container mouth and having a through hole for the lubricant composition to pass through.

[0037] The grease gun according to another technical solution of the present invention can improve the life of the reducer at high temperatures and can suppress the increase of input torque at low temperatures. In addition, the grease gun according to another technical solution of the present invention can suppress the leakage of the lubricant composition that can increase the starting efficiency of the reducer and can be set to a small dose. Therefore, the grease gun according to another technical solution of the present invention uses a container (bag container) that can easily and cheaply store the lubricant composition for a long time and can easily perform the operation of injecting grease into the reducer. As a result, when replacing the grease filled in the reducer, the grease gun can be easily connected to the reducer without transferring the grease to other containers, thereby suppressing the leakage of the lubricant composition (grease) to the surrounding of the connecting member. Therefore, the grease gun according to another technical solution of the present invention can simplify the operation process in the connection operation and injection operation and shorten the operation time, and can perform the operation of injecting and replacing grease into the reducer cheaply.

[0038] A grease gun according to another embodiment of the present invention comprises: a barrel portion that houses a container having a bag filled with and sealed with a lubricant composition having a base oil ratio of 50% to 99% by weight, the bag being formed from a film-like material; a container nozzle fixed to the bag; a pressing portion that presses the container within the barrel portion to extrude the lubricant composition; and a connecting member connected to the container nozzle and having a through-hole for allowing the lubricant composition to pass through.

[0039] The grease gun according to another technical solution of the present invention can improve the life of the reducer at high temperatures and can suppress the increase of input torque at low temperatures. In addition, the grease gun according to another technical solution of the present invention can suppress the leakage of the lubricant composition that can increase the starting efficiency of the reducer and can be set to a small dose. Therefore, the grease gun according to another technical solution of the present invention uses a container (bag container) that can easily and cheaply store the lubricant composition for a long time and can easily perform the operation of injecting grease into the reducer. As a result, when replacing the grease filled in the reducer, the grease gun can be easily connected to the reducer without transferring the grease to other containers, thereby suppressing the leakage of the lubricant composition (grease) to the surrounding of the connecting member. Therefore, the grease gun according to another technical solution of the present invention can simplify the operation process in the connection operation and injection operation and shorten the operation time, and can perform the operation of injecting and replacing grease into the reducer cheaply.

[0040] Another embodiment of the present invention provides a grease gun comprising: a barrel containing a container having a bag filled with a lubricant composition and sealed therein, the bag being formed of a film-like material, the lubricant composition having a consistency of 300 to 450, and containing a kinematic viscosity of 20 mm at 40°C. 2 / s~150mm 2 / s of base oil, the ratio of the base oil is 50% by weight to 99% by weight; a container mouth, which is fixed to the bag; a pressing portion, which presses the container in the barrel to squeeze out the lubricant composition; and a connecting member, which is connected to the container mouth and has a through hole for allowing the lubricant composition to pass through.

[0041] The grease gun according to another technical solution of the present invention can improve the life of the reducer at high temperatures and can suppress the increase of input torque at low temperatures. In addition, the grease gun according to another technical solution of the present invention can suppress the leakage of the lubricant composition that can increase the starting efficiency of the reducer and can be set to a small dose. Therefore, the grease gun according to another technical solution of the present invention uses a container (bag container) that can easily and cheaply store the lubricant composition for a long time and can easily perform the operation of injecting grease into the reducer. As a result, when replacing the grease filled in the reducer, the grease gun can be easily connected to the reducer without transferring the grease to other containers, thereby suppressing the leakage of the lubricant composition (grease) to the surrounding of the connecting member. Therefore, the grease gun according to another technical solution of the present invention can simplify the operation process in the connection operation and injection operation and shorten the operation time, and can perform the operation of injecting and replacing grease into the reducer cheaply.

[0042] A grease gun according to another embodiment of the present invention comprises: a barrel portion for accommodating a container, the container comprising: a bag filled with a lubricant composition and sealed therein, the bag being formed of a film-like material; and a container mouth bonded and fixed to the bag; a pressing portion for pressing the container within the barrel portion to extrude the lubricant composition; and a connecting member having a through-hole having threads formed at both ends thereof for connecting to the container mouth of the container and threads for connecting to a connecting tube connected to a destination to which the lubricant composition is supplied, the through-hole allowing the lubricant composition to pass from the container toward the destination.

[0043] The grease gun according to another technical solution of the present invention can improve the life of the reducer at high temperatures and can suppress the increase of input torque at low temperatures. In addition, the grease gun according to another technical solution of the present invention can suppress the leakage of the lubricant composition that can increase the starting efficiency of the reducer and can be set to a small dose. Moreover, the container (bag container) used for the grease gun according to another technical solution of the present invention can easily and cheaply store the lubricant composition for a long time. The container (bag container) is connected to the connecting member, and the connecting pipe is connected to the connecting member, so that it can be easily injected into the reducer. As a result, when replacing the grease filled in the reducer, the grease gun can be easily connected to the reducer without transferring the grease to another container. Therefore, the grease gun according to another technical solution of the present invention can suppress the leakage of the lubricant composition (grease) to the surrounding of the connecting member, simplify the working process in the connection operation and injection operation, shorten the working time, and perform the operation of injecting grease into the reducer and replacing grease cheaply.

[0044] The grease gun of another technical solution of the present invention may also be configured such that the flow rate of the lubricant composition extruded from the through hole is 1 cm 3 / s~7cm 3 / s.

[0045] In another embodiment of the present invention, the grease gun may have a pressurized delivery pressure of 3 MPa or less for extruding the lubricant composition.

[0046] In another embodiment of the present invention, the grease gun may have a connecting pipe connected to the grease gun having an inner diameter of 2.5 mm to 20 mm and a pipe length of 1000 mm or less.

[0047] Another embodiment of the present invention provides a connecting member having a through-hole and being attachable to and detachable from the barrel of a grease gun. The through-hole has threads formed at both ends for connecting to a container nozzle of a container and a connecting tube. The container comprises: a bag filled with and sealed with a lubricant composition, the bag being formed of a film-like material; and the container nozzle being adhesively fixed to the bag. The connecting tube is connected to a destination to which the lubricant composition is supplied.

[0048] According to another embodiment of the present invention, a connecting member has a threaded portion connected to the mouth of a bag container, which is also connected to a connecting tube. This connecting tube is connected to a reducer to which the lubricant composition is supplied. In this state, the connecting member and bag container are housed within the barrel of a grease gun, with the connecting tube protruding from the tip of the grease gun. In this state, the connecting tube is connected to the reducer, and the grease gun's extrusion section squeezes the bag container within the barrel. This squeezes out the lubricant composition, replacing the grease already filled in the reducer.

[0049] The container (bag container) used in the connecting member of another embodiment of the present invention can improve the life of the speed reducer at high temperatures and suppress increases in input torque at low temperatures. Furthermore, this container (bag container) suppresses the leakage of the lubricant composition, which can improve the starting efficiency of the speed reducer, and keeps the amount of lubricant in a small amount, thereby enabling easy and inexpensive long-term storage of the lubricant composition.

[0050] This suppression allows for easy injection into the reducer using the container (bag container), the connecting member of another embodiment of the present invention, and the connecting tube. This allows for easy connection of the grease gun to the reducer when replacing grease already filled in the reducer, without transferring the grease to another container. Consequently, the connecting portion of another embodiment of the present invention can suppress leakage of the lubricant composition (grease) around the connecting member, simplifying the connection and injection processes and reducing work time, making it possible to inexpensively inject and replace grease into the reducer.

[0051] A container according to another embodiment of the present invention includes a cylindrical or bag-shaped storage member, which is filled with a lubricant composition having a consistency of 300 to 450 and is sealed with a film-like material.

[0052] According to another technical solution of the present invention, the container can improve the life of the reducer at high temperatures and can suppress the increase in input torque at low temperatures. In addition, according to another technical solution of the present invention, the container can suppress the leakage of the lubricant composition (grease) that can increase the starting efficiency of the reducer and can be set to a small dose. Therefore, the container of another technical solution of the present invention will accommodate a storage component that facilitates the long-term storage of the lubricant composition within the barrel of the grease gun, and can be easily connected to the reducer without transferring the grease. As a result, the operating process can be reduced and the operating time can be shortened, making it easy and inexpensive to inject grease into the reducer to replace the grease.

[0053] A container according to another embodiment of the present invention comprises: a cylindrical or bag-shaped storage member filled with a lubricant composition having a consistency of 300 to 450 and sealed with a film-like material; and a container mouth fixed to the storage member.

[0054] According to another technical solution of the present invention, the container can improve the life of the reducer at high temperatures and can suppress the increase of input torque at low temperatures. In addition, according to another technical solution of the present invention, the container can suppress the leakage of the lubricant composition (grease) that can increase the starting efficiency of the reducer and can be set to a small dose. The container of another technical solution of the present invention accommodates a storage component that facilitates long-term storage of the lubricant composition in the barrel of the grease gun, and can be easily connected to the reducer using the container nozzle without transferring the grease. As a result, the operation process can be reduced and the operation time can be shortened, and the operation of injecting grease into the reducer to replace the grease can be easily and inexpensively performed.

[0055] Effects of the Invention

[0056] According to the present invention, it is possible to provide a structure that can easily replace grease in a speed reducer by using a grease gun and a bag container that can suppress grease leakage and are simple in structure and inexpensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a perspective view showing a bag container according to one embodiment of the present invention.

[0058] Figure 2 This is a schematic enlarged cross-sectional view showing a region near an extrusion port base of a bag container according to one embodiment of the present invention.

[0059] Figure 3 This is an exploded perspective view showing a grease gun according to one embodiment of the present invention.

[0060] Figure 4 This is a schematic enlarged cross-sectional view showing an area near the tip of a grease gun according to one embodiment of the present invention.

[0061] Figure 5 It is a cross-sectional view showing a connection member according to one embodiment of the present invention.

[0062] Figure 6 yes Figure 5 VI-VI sectional view.

[0063] Figure 7 This is a schematic diagram showing a grease gun in use according to one embodiment of the present invention.

[0064] Description of Reference Numerals

[0065] 1. Bag container (container); 1g. Extrusion port (container mouth); 1j. Cylindrical portion; 2. Lid; 10. Grease gun; 11. Cylinder (cylindrical portion); 11b. Threaded portion; 12. Lid body; 12a. Through hole; 12b. Threaded portion; 12c. Surface; 12e. Flat portion; 13. Trigger mechanism (extrusion portion); 13a. Trigger; 14. Piston; 20. Connecting member; 21. Top end; 22. Flange; 23. Through hole; 23a. Threaded portion; 23b. Threaded portion; 30. Grease gun hose (connecting pipe); 31. End portion; 33. End portion; 33n. External thread. DETAILED DESCRIPTION

[0066] Hereinafter, a bag container, a grease gun, and a connecting member according to embodiments of the present invention will be described with reference to the drawings.

[0067] The bag container (container) of the present embodiment is filled with a lubricant composition (grease) for a speed reducer to be enclosed in an eccentric oscillating planetary gear type speed reducer, for example.

[0068] The lubricant composition (grease) of this embodiment is defined as follows.

[0069] 1. A lubricant composition for an eccentric oscillating planetary gear type speed reducer characterized by containing the following components (a) to (c):

[0070] (a) Base oils containing synthetic oils;

[0071] (b) hydrocarbon waxes; and

[0072] (c) at least one calcium salt selected from the group consisting of calcium salts of petroleum sulfonic acids, calcium salts of alkyl aromatic sulfonic acids, calcium salts of oxidized waxes, overbased calcium salts of petroleum sulfonic acids, overbased calcium salts of alkyl aromatic sulfonic acids, and overbased calcium salts of oxidized waxes.

[0073] 2. The lubricant composition for a speed reducer according to 1. above, wherein the hydrocarbon wax (b) is at least one selected from the group consisting of polyethylene wax and polypropylene wax.

[0074] 3. The lubricant composition for a speed reducer according to 1. or 2. above, wherein the content of the (b) hydrocarbon wax is 0.1% by mass to 20% by mass in the entire composition.

[0075] 4. The lubricant composition for a speed reducer according to any one of 1. to 3. above, wherein the synthetic oil in the base oil (a) is a synthetic hydrocarbon oil.

[0076] 5. The lubricant composition for a speed reducer according to any one of 1. to 4., wherein the kinematic viscosity of the base oil (a) at 40°C is 20 mm 2 / s~300mm2 / s.

[0077] 6. The lubricant composition for a speed reducer according to any one of 1. to 5. above, wherein the calcium salt (c) is a calcium salt of an alkyl aromatic sulfonic acid or a high-based calcium salt of an alkyl aromatic sulfonic acid.

[0078] The base oil (a) used in this embodiment contains synthetic oil as an essential component and may also contain other base oils such as mineral oil. As the synthetic oil, synthetic oils commonly used in lubricant compositions, such as synthetic hydrocarbon oils, ester oils, phenyl ether, and polyethylene glycol, can be used. A single synthetic oil may be used alone, or two or more may be used together. A preferred synthetic oil is a synthetic hydrocarbon oil. Specifically, synthetic hydrocarbon oils obtained by mixing and polymerizing one or more α-olefins can be cited.

[0079] Specific examples of α-olefins include those produced from ethylene, propylene, butene, and derivatives thereof. Preferred examples include α-olefins having 6 to 18 carbon atoms (e.g., 1-decene, 1-dodecene, etc.). The most preferred synthetic hydrocarbon oil is poly-α-olefin (PAO), which is an oligomer of 1-decene and 1-dodecene.

[0080] The base oil is preferably a base oil containing a synthetic hydrocarbon oil (eg, PAO), and more preferably a combination of a synthetic hydrocarbon oil (eg, PAO) and a mineral oil.

[0081] The proportion of synthetic oil (e.g., synthetic hydrocarbon oil such as PAO) in the base oil is preferably 10% to 100% by mass, more preferably 10% to 50% by mass (e.g., 10% to 20% by mass). If it is less than 10% by mass, the input torque may increase at low temperatures.

[0082] The ratio of the base oil in the lubricant composition is preferably 50% by mass to 99% by mass, more preferably 70% by mass to 95% by mass.

[0083] The kinematic viscosity of the base oil used in this embodiment at 40° C. is, for example, 20 mm 2 / s~300mm 2 / s, preferably 30mm 2 / s~220mm 2 / s (e.g. 40mm 2 / s~200mm 2 / s), more preferably 50mm 2 / s~150mm 2 / s (especially 60mm 2 / s~100mm 2 / s). If it is less than 20mm 2 / s, there is a tendency for the life to become insufficient at high temperatures. In addition, if it exceeds 300mm 2 / s, there is a tendency for startup failure to occur at low temperatures. The kinematic viscosity at 40°C is measured by a method in accordance with JIS K 2283.

[0084] <Hydrocarbon wax>

[0085] The (b) hydrocarbon wax used in this embodiment is not particularly limited, but as a specific example, it contains at least one compound selected from the group consisting of polyolefin waxes (polyethylene wax, oxidized polyethylene wax, polypropylene wax, ethylene-propylene copolymer wax, etc.), montan wax and amide wax.

[0086] Among the hydrocarbon waxes mentioned above, polyolefin waxes are also preferably used. The weight-average molecular weight of the polyolefin wax is not particularly limited, but is, for example, approximately 1,000 to 20,000. The melt viscosity of the polyolefin wax is not particularly limited, but may be, for example, 25,000 to 30,000 mPa·s at 140°C, and 9,000 to 10,000 mPa·s at 170°C.

[0087] Furthermore, the density of the polyolefin wax is not particularly limited and may be high density (e.g., 0.96 g / cm 3 Above), medium density (e.g. 0.94g / cm 3 ~0.95g / cm 3 ) and low density (e.g. 0.93 g / cm 3 Any of the following. Polyolefin waxes with high density have characteristics such as high melting point, softening point, crystallinity, and hardness. Low density waxes have characteristics such as low melting point and softening point and softness. From the perspective of heat resistance, the dropping point of polyolefin wax is preferably 100°C or higher, more preferably 110°C or higher. From the perspective of solubility in base oil, the dropping point of polyolefin wax is preferably 150°C or lower, more preferably 135°C or lower.

[0088] The acid value of the polyolefin wax is preferably 0 to 10 mgKOH / g, more preferably 0 to 5 mgKOH / g. The acid value of the polyolefin wax within this range is preferred because the acid component has less influence on oxidative degradation of the lubricant composition.

[0089] Among the polyolefin waxes, at least one selected from the group consisting of polyethylene wax, polypropylene wax, and ethylene-propylene copolymer wax is also preferred, and at least one selected from the group consisting of polyethylene wax and polypropylene wax is more preferred.

[0090] Examples of commercially available polyethylene waxes include Licowax PE520, PE190, and PE130 manufactured by Clariant (Japan). Examples of commercially available polypropylene waxes include Licosen PP 7502, PP3602, and Ceridust 6050M manufactured by Clariant (Japan); and HI-WAX NP105 and NP500 manufactured by Mitsui Chemicals, Inc.

[0091] The most preferred hydrocarbon wax is polypropylene wax.

[0092] The proportion of the hydrocarbon wax in the lubricant composition is, for example, 0.1 to 20 mass%, preferably 0.1 to 10 mass%, more preferably 0.5 to 7 mass%, and even more preferably 1 to 5 mass%.

[0093] Calcium salt

[0094] The (c) calcium salt used in this embodiment is at least one selected from the group consisting of calcium salts of petroleum sulfonic acids, calcium salts of alkyl aromatic sulfonic acids, calcium salts of oxidized waxes, overbased calcium salts of petroleum sulfonic acids, overbased calcium salts of alkyl aromatic sulfonic acids, and overbased calcium salts of oxidized waxes.

[0095] In the present embodiment, the "high-based calcium salt of X" refers to a calcium salt of X having a base number of 200 mgKOH / g or more as measured in accordance with JIS K 2501. Furthermore, when simply referred to as "calcium salt of X," the "calcium salt of X" refers to a calcium salt other than a high-based calcium salt (neutral or alkaline calcium salt), that is, a calcium salt of X having a base number of less than 200 mgKOH / g as measured in accordance with JIS K 2501.

[0096] The calcium salt is preferably at least one selected from the group consisting of calcium salts of alkyl aromatic sulfonic acids and overbased calcium salts of alkyl aromatic sulfonic acids. A more preferred calcium salt is a combination of a calcium salt of an alkyl aromatic sulfonic acid and an overbased calcium salt of an alkyl aromatic sulfonic acid. In this combination, the proportion of the overbased calcium salt of the alkyl aromatic sulfonic acid is, for example, preferably 50% to 99% by mass, more preferably 60% to 90% by mass, and even more preferably 65% ​​to 80% by mass. This combination further improves durability at high temperatures.

[0097] The proportion of the calcium salt in the lubricant composition is preferably 0.1% to 20% by mass, more preferably 0.5% to 10% by mass (e.g., 1% to 5% by mass). If the proportion is less than 0.1% by mass, the life at high temperatures tends to be insufficient, while if the proportion exceeds 20% by mass, the effect commensurate with the amount added tends to be insufficient.

[0098] Thickener

[0099] The lubricant composition of this embodiment may also contain (d) a thickener. Examples of thickeners include soap-based thickeners such as lithium soaps and complex lithium soaps, urea-based thickeners such as diurea, inorganic thickeners such as organoclays and silica, and organic thickeners such as PTFE. Among thickeners, lithium soap-based thickeners and urea-based thickeners are preferred, with lithium soap-based thickeners being more preferred.

[0100] The proportion of the thickener in the lubricant composition is preferably 0 to 20% by mass (e.g., 1 to 15% by mass), and more preferably 0.5 to 10% by mass (e.g., 0.5 to 3% by mass). If the proportion of the thickener in the lubricant composition is less than 0.5% by mass, there is no thickening effect. If it exceeds 20% by mass, the lubricant composition becomes too hard and tends to not flow into the lubricated area, making it difficult to achieve a sufficient effect.

[0101] When the lubricant composition contains a thickener, the viscosity of the lubricant composition is preferably 300 to 450 (e.g., 350 to 410), more preferably 395 to 425. The viscosity is defined in JIS K 2220 and is a value measured immediately after mixing a sample by inverting 60 times using a specified mixer.

[0102] The lubricant composition of this embodiment may be blended with other optional additives as needed. Examples of such optional additives include rust inhibitors other than (c) calcium salts, detergent dispersants, extreme pressure agents, antioxidants, metal corrosion inhibitors, oiliness agents, anti-wear agents, and solid lubricants. Among these, (e) extreme pressure agents are also preferred.

[0103] <Extreme pressure agent>

[0104] The (e) extreme pressure agent optionally used in the lubricant composition of this embodiment is not particularly limited. For example, at least one selected from thiophosphates and thiocarbamic acids can be used. Examples of the thiophosphates include dithiophosphates, preferably zinc or molybdenum salts of dithiophosphoric acids (e.g., dialkyldithiophosphoric acids). Examples of the thiocarbamic acids include dithiocarbamates, preferably zinc or molybdenum salts of dithiocarbamic acids (e.g., dialkyldithiocarbamic acids).

[0105] A preferred extreme pressure agent is at least one selected from the group consisting of molybdenum dithiocarbamates and zinc dithiophosphates. A more preferred extreme pressure agent is a combination of molybdenum dithiocarbamates (particularly molybdenum dialkyl dithiocarbamates) and zinc dithiophosphates (particularly zinc dialkyl dithiophosphates). The proportion of molybdenum dithiocarbamate in this combination is preferably 50% to 99% by mass, more preferably 55% to 90% by mass.

[0106] The ratio of the extreme pressure agent in the lubricant composition is preferably 0 to 1.5% by mass, more preferably 0.5 to 1% by mass. If it exceeds 1.5% by mass, the probability of vibration of the speed reducer due to precipitation of the additive increases.

[0107] As one of the preferred aspects of the lubricant composition of the present embodiment, the following aspects can be mentioned.

[0108] A lubricant composition for an eccentric oscillating planetary gear type speed reducer containing the following components (a) to (e):

[0109] (a) Base oils containing synthetic hydrocarbon oils;

[0110] (b) at least one selected from the group consisting of polyethylene wax and polypropylene wax;

[0111] (c) at least one selected from the group consisting of calcium salts of alkyl aromatic sulfonic acids and overbased calcium salts of alkyl aromatic sulfonic acids;

[0112] (d) lithium soap thickener; and

[0113] (e) At least one selected from the group consisting of molybdenum dithiocarbamate and zinc dithiophosphate.

[0114] The lubricant composition of this embodiment can be used in eccentric oscillating planetary gear type speed reducers. In particular, it is preferably used in eccentric oscillating planetary gear type speed reducers mounted on the joints of robots due to its durability at high temperatures and ability to suppress fluctuations in output torque.

[0115] A representative example of such a speed reducer includes a first-stage speed reduction mechanism and a second-stage speed reduction mechanism, wherein the first-stage speed reduction mechanism reduces the speed of rotation from a motor and transmits the speed to the second-stage speed reduction mechanism. Another representative example of such a speed reducer includes an eccentric oscillating speed reducer, wherein the second-stage speed reduction mechanism includes an internally toothed gear body; an externally toothed gear body meshing with the internally toothed gear body; a crankshaft engaged with the externally toothed gear body so as to cause the externally toothed gear body to oscillate eccentrically relative to the internally toothed gear body; and a support body rotatably supporting the crankshaft, wherein the eccentric oscillating speed reducer output is extracted from the internally toothed gear body or the support body.

[0116] Next, the bag container according to the present embodiment will be described with reference to the drawings.

[0117] Figure 1 1 is a perspective view showing a bag container according to this embodiment. Figure 2 1 is a schematic enlarged cross-sectional view showing a region near an extrusion port base of a bag container according to the present embodiment. In the figure, reference numeral 1 denotes the bag container.

[0118] The bag container (container) 1 of this embodiment is filled with and sealed with a lubricant composition (grease) for a speed reducer, for example, to be enclosed in an eccentric oscillating planetary gear type speed reducer. The bag container (container) 1 of this embodiment can be used as a lubricant feeder.

[0119] like Figure 1 As shown, the bag container 1 of this embodiment is shaped like a ship's bottom. A deformed hexagonal film 1c is placed at one end of two roughly rectangular films (film-like materials) 1a and 1b. The entire circumference of this film 1c is welded to the films 1a and 1b. Furthermore, the bag container 1 of this embodiment is formed by welding the edges of the films 1a and 1b together. After filling the bag container with the contents, the other ends of the films 1a and 1b are welded together to seal the bag.

[0120] like Figure 2 As shown, in this embodiment, the films 1a, 1b, and 1c that constitute the bag (storage member) of the bag container 1 have gas barrier properties. The aluminum foil 1d that constitutes the bag (storage member) of the bag container 1 functions as a gas barrier layer and a water vapor barrier layer. The structure is as follows: a stretched polyamide resin layer 1e serving as a base film is laminated on one surface of the aluminum foil 1d, and a low-density polyethylene film layer 1f or an unstretched polypropylene film layer is laminated on the other surface of the aluminum foil 1d. The stretched polyamide resin layer 1e serving as the base film is welded so that it is located on the outermost surface of the bag container 1.

[0121] The bag container 1 is filled with the contents. Figure 1 As shown, the film 1c is substantially flat. The extrusion port (container mouth) 1g is bonded and fixed to the flat portion of the film 1c. Figure 2 As shown, the extrusion port 1g is composed of an extrusion port base 1h. The extrusion port base 1h has a flange 1k formed on one end of a cylindrical portion 1j. The flange 1k is bonded to the film 1c of the bag container 1 by a hot melt layer 1m. External threads 1n are engraved on the outer circumference of the cylindrical portion 1j of the extrusion port base 1h. A cap 2 may also be provided on the extrusion port 1g.

[0122] The cap 2 is a cylindrical body with a bottom and an opening at the base end. The top end of the cap 2 is sealed when not in use and is opened when the contents are to be extruded. The inner circumference of the base end of the cap 2 is provided with an internal thread that is threadedly engaged with the external thread 1n.

[0123] The bag film 1c may have an easy-to-open portion 1p formed in the region inside the extrusion port base 1h. The easy-to-open portion 1p has a structure where only the stretched polyamide resin layer 1e of the base film serving as the outermost layer of the bag container 1 is missing.

[0124] When perforating the bag container 1, the tip of a suitable push rod or the like is inserted through the opening of the cylindrical portion 1j into the inner side of the extrusion port base 1h to pierce the easy-opening portion 1p. At this time, since the stretched polyamide resin layer 1e, which is the relatively strong base film, is missing from the easy-opening portion 1p, even using a push rod or the like with a relatively rounded tip, it is possible to easily pierce the easy-opening portion 1p and create a hole.

[0125] Furthermore, the following structure can also be adopted.

[0126] For example, the following structures can be adopted: (1) a structure in which a circular notch is formed in the stretched polyamide resin layer 1e serving as the base film using a cutting edge; (2) a structure in which many fine holes are similarly formed in the stretched polyamide resin layer 1e serving as the outermost layer of the base film; (3) a structure in which an "X"-shaped notch is formed in the entire film 1c and the portion where the notch is formed is covered with aluminum foil or paper.

[0127] Alternatively, the bag container 1 can be constructed from a single-layer film made of, for example, a stretched polyamide resin. In this case, a thin-walled portion can be formed in the single-layer film to provide an easily opened portion. Furthermore, the notch formed by the cutting edge can have an "X" shape, in addition to the circular shape described above. Furthermore, when using a single-layer film, an "X"-shaped notch can be formed and the portion where the notch is formed can be covered with aluminum foil or paper.

[0128] In the case of a bag container formed of a laminated film, the type of laminated film, the laminated structure, etc. are not limited to the above-mentioned combination. For example, the following structures can be adopted: (1) a laminated structure without aluminum foil, (2) a laminated structure in which a polyamide resin layer is disposed on the inner side of the aluminum foil in addition to the above-mentioned laminated structure. In the above-mentioned (1) laminated structure without aluminum foil, the easy-to-pierce portion (easy-to-open portion) can be formed by forming a missing portion, a notch, or a large number of micro-holes in the base film, similarly to the above-mentioned laminated structure.

[0129] In addition, as the structure of the easy-to-open portion in the structure of the above-mentioned (2) also having a polyamide resin layer on the inner side of the aluminum foil, a structure in which the stretched polyamide resin layer 1e as the outermost layer of the base film, the aluminum foil 1d, and the polyamide resin layer on the inner side of the aluminum foil are missing can be adopted. In addition, as the structure of the easy-to-open portion in the structure of the above-mentioned (2) also having a polyamide resin layer on the inner side of the aluminum foil, a structure in which only the stretched polyamide resin layer 1e as the outermost layer is notched can be adopted. In addition, in the structure of the above-mentioned (2) also having a polyamide resin layer on the inner side of the aluminum foil, the easy-to-open portion can be formed by forming a missing portion, a notch, or many tiny holes only in the base film, similarly to the above-mentioned laminated structure. In the case of adopting the easy-to-open portion in which many tiny holes are formed, a structure in which only the stretched polyamide resin layer 1e as the outermost layer is notched can be adopted.

[0130] Furthermore, as the material of the base film, in addition to stretched polyamide resin, known materials used for bags such as stretched polypropylene and polyethylene can be adopted.

[0131] Furthermore, the films 1a, 1b, and 1c constituting the bag container 1 have the same film structure, and an easy-opening portion 1p is formed on the inner side of the film 1c to which the container mouth 1g is bonded, closer to the container mouth 1g. However, the film 1c may also have a film structure that is easier to pierce than the other films 1a and 1b.

[0132] Specifically, the bag has a structure in which a first film 1a and a second film 1b are stacked, a third film 1c is placed at one end of the first and second films 1a and 1b, and the entire circumference of the third film 1c is bonded to the first film 1a or 21b. Furthermore, the bag has a structure in which the edges of the first and second films 1a and 1b are bonded to each other, and the remaining ends of the films 1a and 1b are bonded after the contents are filled. For a bag container 1, such as a boat-shaped bag, in which this bag is used, when the container mouth 1g is bonded to the third film 1c forming one end of the bag container 1, the third film 1c can be configured to be more easily pierced than the first and second films 1a and 1b.

[0133] For example, the first film 1a and the second film 1b can be configured, from the front surface side (outermost surface of the bag container 1), as follows: polyamide resin layer (15 μm; thickness, the same applies hereinafter) / aluminum foil (9 μm) / polyamide resin layer (25 μm) / low-density polyethylene resin layer (70 μm). Similarly, the third film 1c can be configured, from the front surface side (outermost surface of the bag container 1), as follows: polyamide resin layer (15 μm) / aluminum foil (9 μm) / low-density polyethylene layer (30 μm).

[0134] Thus, the first film 1a and the second film 1b forming the bag body are made stronger, thereby ensuring the strength of the bag container 1. Furthermore, the third film 1c forming the end of the bag container 1 and to which the container mouth 1g is bonded can be pierced relatively easily by a rod or the like.

[0135] While the third film 1c is weaker than the first and second films 1a and 1b, when inserted into an extruder and a sealant is extruded through the container nozzle 1g as described above, the third film 1c contacts the inner end surface of the extruder. Therefore, the extrusion force is borne by the inner end surface of the extruder, preventing breakage during extrusion. Furthermore, the strength of the bond between the first and second films 1a and 1b can be ensured by thickening the sealant layers of the first and second films 1a and 1b.

[0136] The bag container 1 of this embodiment can be of any shape as long as the contents can be extruded without leaving any residue using an extruder, etc. Specifically, the bag container 1 of this embodiment is preferably a tubular bag or a bag-shaped bag using a boat-shaped bag (boat-shaped bag) or a stand-up bag, which improves the container's usability and operability.

[0137] Next, the grease gun and the connecting member according to the present embodiment will be described with reference to the drawings.

[0138] Figure 3 It is an exploded perspective view showing the grease gun according to this embodiment. Figure 4 1 is a schematic enlarged cross-sectional view showing the vicinity of the tip of the grease gun according to the present embodiment.

[0139] The grease gun 10 of the present embodiment functions as a lubricant supply device and is used, for example, when filling a speed reducer lubricant composition (grease) into an eccentric oscillating planetary gear type speed reducer.

[0140] like Figure 3 As shown, the grease gun 10 of this embodiment includes: a cylinder (barrel) 11 as a main body, which is open at both ends; a cover body 12, which is detachably mounted and fixed to one end side of the cylinder 11 and formed with a through hole 12a; a connecting member 20, which is located on the inner side of the cover body 12 and is mounted on the container mouth 1g of the bag container 1; a piston 14, which is arranged in a swingable manner in the cylinder 11; and a trigger mechanism (pressing part) 13, which supports the piston 14 so that it can move relative to the cylinder 11.

[0141] Cylinder 11 is generally cylindrical and houses bag container 1 containing a lubricant composition (grease). A piston 14 is connected to a rod capable of squeezing bag container 1 within cylinder 11. This rod is moved axially by a trigger mechanism (squeezing portion) 13. Piston 14 may also be provided with a guide that engages with the rod of piston 14 so as to be movable relative to the rod.

[0142] like Figure 3 、 Figure 4 As shown, the cover 12 has a threaded portion 12b formed on its inner side in contact with the outer periphery of the end of the cylinder 11 for fastening the cover 12 and the cylinder 11 to each other. A threaded portion 11b corresponding to the threaded portion 12b of the cover 12 is formed on the outer periphery of the end of the cylinder 11.

[0143] The trigger mechanism (pressing portion) 13 includes a trigger 13a for moving the piston 14. The trigger mechanism (pressing portion) 13 also serves as a support member 13b for closing the other end side of the cylinder 11.

[0144] Furthermore, the squeezing portion is not limited to a manual squeezing portion using such a trigger, as long as it can squeeze the bag container 1 , and may be a hydraulic, electric, or pneumatic squeezing portion.

[0145] Figure 5 It is a cross-sectional view showing the connection member according to the present embodiment. Figure 6 yes Figure 5 VI-VI sectional view.

[0146] The connecting member 20 includes a tip portion 21 extending through the through hole 12a of the cover 12 and a flange portion 22 located inside the cover 12 and abutting against the periphery of the through hole 12a. The connecting member 20 is attachable to and detachable from the cylinder 11.

[0147] The connection member 20 has a through hole 23 formed along the axis from the tip portion 21 toward the flange portion 22. The through hole 23 is formed coaxially with the tip portion 21 and the flange portion 22.

[0148] The tip portion 21 is cylindrical and extends through the through hole 12a of the cover 12 when the connecting member 20 is installed in the cylinder 11, with a portion thereof protruding from the cover 12. The side of the tip portion 21 opposite to the portion protruding from the cover 12 is connected to the interior of the cylinder 11.

[0149] The flange portion 22 is formed so that the outer periphery of the end portion of the tip portion 21 connected to the inside of the cylinder 11 is enlarged in diameter. The outer diameter of the flange portion 22 is substantially the same as the inner diameter of the cylinder 11 or slightly smaller than the inner diameter of the cylinder 11.

[0150] A through hole 23 is formed inside the tip portion 21 and extends from the end of the tip portion 21 protruding from the lid 12 (the end of the tip portion 21) toward the interior of the cylinder 11. The opening of the through hole 23 has a diameter large enough to allow the cylindrical portion 1j of the extrusion port (container nozzle) 1g of the bag container 1 to be inserted and mounted.

[0151] A threaded portion 23a is formed on the inner circumferential surface of the portion of the through-hole 23 that opens into the interior of the cylinder 11. The threaded portion 23a corresponds to the external thread 1n formed on the outer circumference of the cylindrical portion 1j of the extrusion port (container nozzle) 1g of the bag container 1. Specifically, the threaded portion 23a and the external thread 1n are configured such that they are fastened to each other, creating a tight seal between the container nozzle 1g and the through-hole 23. The pitch, nominal diameter, valley diameter, effective diameter, and thread angle of the thread are determined accordingly.

[0152] In addition, Figure 4 The container mouth 1g is also described in order to understand the correspondence between the threaded portion 23a and the external thread 1n. Other coupling structures other than threads are also possible.

[0153] The opening of the through hole 23 provided at the end portion close to the tip portion 21 has a diameter dimension such that an end portion 33 of a grease gun hose (connecting tube) 30 described later can be inserted and mounted.

[0154] A threaded portion 23b is formed on the inner circumferential surface of the opening of the through-hole 23, located near the tip portion 21. The threaded portion 23b corresponds to the external thread 33n formed on the grease gun hose 30. Specifically, the threaded portion 23b and the external thread 33n are configured such that the thread pitch, nominal diameter, valley diameter, effective diameter, and thread angle are set so that the threaded portion 23b and the external thread 33n are fastened to each other, sealing the grease gun hose 30 and the through-hole 23.

[0155] Either the threaded portion 23a or the threaded portion 23b may be a reverse thread. In this embodiment, the threaded portion 23a may be a left-hand thread. This prevents the previously tightened thread from coming loose when the external thread 33n of the end portion 33 of the grease gun hose 30 and the external thread 1n of the extrusion port (container nozzle) 1g of the bag container 1 are respectively fastened to the connecting member 20 to connect them. Alternatively, neither the threaded portion 23a nor the threaded portion 23b may be a reverse thread.

[0156] The connecting member 20, which has a through-hole 23, is a separate member from the cylindrical portion 1j of the bag container 1's extrusion port (container nozzle) 1g. The through-hole 23 has an opening connected to the interior of the cylinder 11 and an opening at the end of the tip portion 21. The connecting member 20, which has a through-hole 23, connects the cylindrical portion 1j of the bag container 1's extrusion port (container nozzle) 1g to the end portion 33 of the grease gun hose 30. Therefore, the portion forming the opening connected to the interior of the cylinder 11 and the portion forming the opening at the end of the tip portion 21 have different diameters. The portion forming the opening connected to the interior of the cylinder 11 is connected to the cylindrical portion 1j of the bag container 1's extrusion port (container nozzle) 1g. Furthermore, the portion forming the opening at the end of the tip portion 21 is connected to the end portion 33 of the grease gun hose 30. Therefore, the diameter of the through-hole 23 varies in the axial direction of the connecting member 20. Specifically, a stepped portion 23c is formed, which decreases in diameter from the opening connected to the interior of the cylinder 11 toward the opening at the end of the tip portion 21. In addition, instead of forming the step portion 23 c , a reduced diameter portion having an inner surface inclined along the axial direction may be formed.

[0157] The surface 22c of the flange portion 22, which faces the outside of the tip portion 21 in the axial direction (facing the end of the tip portion 21), contacts the surface 12c. The surface 12c faces the inside of the cylinder 11 within the through-hole 12a of the cover 12. Thus, the surface 22c of the flange portion 22 contacts the surface 12c of the cover 12. Furthermore, the tip portion 21 is positioned to penetrate the through-hole 12a, thereby positioning the connecting member 20 relative to the cover 12.

[0158] A stepped surface 21d is provided on the outer periphery of the top portion 21. The outer periphery of the top portion 21 is reduced in diameter relative to the outer periphery of the surface 22c. On the outer periphery of the stepped surface 21d, in the portion abutting against the through hole 12a of the cover body 12, a flat surface portion 21e is formed at positions symmetrical with respect to the axis of the connecting member 20. The flat surface portion 21e is provided parallel to the axis of the connecting member 20. The flat surface portions 21e are formed parallel to each other. The flat surface portion 21e is formed in such a manner that the portion corresponding to the flat surface portion 21e is reduced in diameter relative to the top portion 21 on the top side of the top portion 21 than the flat surface portion 21e.

[0159] The length of the flat surface portion 21 e in the direction along the axis of the connection member 20 is set to a width for mounting a clamp.

[0160] A flat surface 12e is provided on the inner circumference of the through-hole 12a of the cover 12, corresponding to the flat surface 21e. Two flat surfaces 12e are formed symmetrically about the axis of the through-hole 12a. The flat surfaces 12e are arranged parallel to the axis of the through-hole 12a. The flat surfaces 12e are formed parallel to one another. The flat surfaces 12e are formed so that the portion corresponding to the flat surfaces 12e is reduced in diameter relative to the inner circumference of the through-hole 12a.

[0161] Figure 7 It is a schematic diagram showing the grease gun of this embodiment in use.

[0162] When using the grease gun 10 of this embodiment, Figure 7 As shown, a grease gun hose 30 is used.

[0163] The grease gun hose 30 is used to fill the lubricant composition (grease). Therefore, the grease gun hose 30 has an end 31 connected to the injection port of the eccentric oscillating planetary gear type speed reducer RV and an end 33 connected to the container mouth 1g of the bag container 1 via the connecting member 20.

[0164] The end portion 31 has a shape that can be connected to an injection port of the speed reducer RV to be supplied, such as a grease joint, and filled with the lubricant composition (grease). The shape of the end portion 31 is not particularly limited as long as it corresponds to the injection port of the speed reducer RV.

[0165] An external thread 33n is formed at the end portion 33. The external thread 33n corresponds to a threaded portion 23b formed on the inner peripheral surface of the opening of the through hole 23 provided at the end portion of the tip portion 21 protruding from the cover body 12.

[0166] The grease gun hose 30 is formed to have a predetermined inner diameter and length. Specifically, the grease gun hose 30 is set to predetermined conditions based on conditions such as the pressurized delivery pressure from the grease gun 10.

[0167] In particular, the relationship formula for pressurized conveyance performance is as follows.

[0168] η=KPπD 4 / (Lν / t)

[0169] η: Apparent viscosity (depends on the mixed consistency of the grease, the kinematic viscosity of the base oil, and the proportion of the base oil.)

[0170] P: pressurized delivery pressure

[0171] D: inner diameter of piping

[0172] L: Piping length

[0173] ν / t: flow rate

[0174] K: constant

[0175] To use the grease gun 10, remove the cover 12 from the cylinder 11. Then, connect the mouth 1g of the bag container 1, which will become the storage box, to the inner opening of the through-hole 23 of the connecting member 20. At this point, tighten the external thread 1n and the threaded portion 23a to form a tight seal. At this point, the connecting member 20 can be left with its tip 21 extending through the through-hole 12a of the cover 12, or it can be separated from the cover 12.

[0176] Next, the connecting member 20 connected to the container spout 1g of the bag container 1 is placed in a state where the tip portion 21 passes through the through hole 12a of the lid 12. The tip portion 21 may be placed in a state where it passes through the through hole 12a of the lid 12 in advance.

[0177] Next, the bag container 1 is inserted into the cylinder 11 so that the container mouth 1g is facing the threaded portion 23a of the connecting member 20 that passes through the cover body 12. Then, the external thread 1n formed on the outer circumference of the cylindrical portion 1j of the container mouth 1g and the threaded portion 23a are tightened. The bag container 1 functions as a storage box. Thereafter, the threaded portion 11b of the cylinder 11 and the threaded portion 12b of the cover body 12 are tightened to attach the cover body 12 to the top end of the cylinder 11, thereby sealing the interior of the cylinder 11. At this time, the surface 22c of the flange portion 22 and the surface 12c of the cover body 12 are in contact with each other. In addition, the top end portion 21 is located at a position that passes through the through hole 12a. As a result, the connecting member 20 is positioned relative to the cover body 12.

[0178] In this state, the easy-to-open portion 1p of the container spout 1g of the bag container 1 is unsealed. Simultaneously, the end 33 of the grease gun hose 30 is connected to the opening of the through-hole 23 of the connecting member 20 that partially protrudes from the lid 12. At this time, the threaded portion 23b and the external thread 33n are fastened to each other. This seals the grease gun hose 30 and the through-hole 23.

[0179] Then, the end portion 31 of the grease gun hose 30 is connected to the injection port of the eccentric oscillating planetary gear type speed reducer RV.

[0180] In this state, the trigger mechanism (pressing portion) 13 is operated to move the piston 14 toward the lid 12. The piston 14 thereby presses the bottom of the bag container 1 and squeezes out the lubricant composition (grease) filled in the bag container 1 under predetermined conditions.

[0181] The lubricant composition (grease) flowing through the grease gun hose 30 is injected into the speed reducer RV from the injection port at a predetermined flow rate and pressure.

[0182] In addition, the above-mentioned steps may be performed in a different order from the above-mentioned order.

[0183] According to the grease gun 10 of this embodiment, the grease filled in the speed reducer RV is replaced by squeezing the grease from the grease gun 10 at a predetermined flow rate and pressure without leaking the lubricant composition (grease) from the connecting member 20 .

[0184] The grease gun 10 of this embodiment can improve the life of the speed reducer RV at high temperatures and suppress increases in input torque at low temperatures. Furthermore, the grease gun 10 of this embodiment can suppress the leakage of the lubricant composition, which improves the starting efficiency of the speed reducer RV, and can be used in small doses. Therefore, the grease gun 10 of this embodiment, by using a bag container 1 that can easily and inexpensively store the lubricant composition (grease) for a long period of time, facilitates the process of injecting grease into the speed reducer RV. Consequently, when replacing grease already filled in the speed reducer RV, the grease gun 10 can be easily connected to the speed reducer RV without transferring the grease to another container, thereby suppressing leakage of the lubricant composition (grease) around the connecting components. Therefore, the grease gun 10 of this embodiment simplifies the connection and injection processes, shortens the work time, and makes injecting and replacing grease into the speed reducer inexpensive.

[0185] The conditions for pressurized delivery of the lubricant composition (grease) according to the present embodiment are as follows.

[0186] The trigger 13a of the grease gun 10 has a grip force of 50 gfk, a lever ratio of 1:12, and an inner diameter of 53 mm.

[0187] Grease gun hose 30 pressure delivery pressure: 3Mpa or less

[0188] Grease gun hose 30 inner diameter 2.5mm~20mm

[0189] Grease gun hose 30 tube length: less than 1000mm

[0190] Output flow: 1cm 3 / s~7cm 3 / s

[0191] Grease mixing consistency 300~450

[0192] Grease base oil kinematic viscosity: 20mm 2 / s~150mm 2 / s(40℃)

[0193] The ratio of base oil in grease: 50% to 99% by weight.

Claims

1. A grease gun, wherein: This grease gun features: a cylindrical portion that accommodates a container having: a bag filled with a lubricant composition and sealed therein, the bag being formed of a film-like material; and a container mouth fixed to the bag; an extrusion portion for squeezing the container in the barrel portion to extrude the lubricant composition; as well as a connecting member that connects the container mouth to a connecting pipe connected to a supply destination of the lubricant composition; The grease gun further includes a cover having a through hole formed therein, the cover being fastened to the outer periphery of the end portion of the barrel. The connecting member has a through hole formed therein, through which the lubricant composition passes from the container toward the supply target. A first thread connected to the container mouth is formed on the inner peripheral surface of one opening portion of the through hole of the connecting member. A second thread connected to the connecting pipe is formed on the inner peripheral surface of the other opening portion of the through hole of the connecting member. The connecting member is located inside the lid and is connected to the container mouth by the first thread. The connecting member further comprises: a top portion extending through the through hole of the cover; and a flange portion located inside the cover and in contact with a peripheral edge of the through hole of the cover; A portion of the flange portion is located inside the end portion of the cylindrical portion. The cover has a first surface facing the interior of the cylinder. The flange portion has a second surface in contact with the first surface, The cover is fastened to the outer periphery of the end portion of the cylinder and the first surface is in contact with the end portion of the cylinder. The cover and the connecting member are positioned by the first surface and the second surface being in contact with each other.

2. The grease gun according to claim 1, wherein: The flow rate of the lubricant composition is 1 cm 3 / s~7cm 3 / s.

3. The grease gun according to claim 1 or 2, wherein: The pressurized delivery pressure for extruding the lubricant composition is 3 MPa or less.

4. The grease gun according to claim 1 or 2, wherein: The inner diameter of the connecting pipe connected to the grease gun is 2.5 mm to 20 mm, and the pipe length is less than 1000 mm.

Images