Gun head of oil gun and oil gun

Abstract

The invention discloses an oil injection gun head and an oil injection gun, and belongs to the technical field of oil injection equipment. The oil gun head comprises a supporting seat, a sealing seat and a pressure sensor. The sealing seat is used for being in butt joint with the oil nozzle, the pressure sensor is used for detecting pressure applied by the oil nozzle to the sealing seat and electrically connected with a controller of the oil gun, and the controller of the oil gun body controls the oil pump to be in a closed state under the condition that the pressure value of the pressure sensor is smaller than a set value. Thus, after the sealing seat is in butt joint with the oil nozzle, when the acting force applied by the oil nozzle to the sealing seat is larger than a set value, namely the sealing seat is tightly attached to the oil nozzle, the oil pump can start oil injection, and the problem that lubricating oil leaks between the sealing seat and the oil nozzle due to oil injection under the condition that the sealing seat is not in butt joint with the oil nozzle or is not in butt joint with the oil nozzle tightly is solved. According to the oil injection gun head, leakage of lubricating oil can be reduced, resources are saved, and the oil injection efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of oil injection equipment, and in particular to a oil injection gun head and an oil injection gun. Background Art

[0002] The sintering trolley is a vehicle for carrying sintering materials. The sintering raw fuel is burned and transported on the sintering trolley to provide raw materials for subsequent smelting processes. Each sintering trolley has four wheels, which are installed on the carriage through the axle and run continuously on the track.

[0003] A bearing is installed between the wheel and the wheel axle, and a grease nipple is installed in the middle of the wheel, which leads to the inside of the bearing. Due to the high temperature and large dust at the sintering site, lubricating oil needs to be regularly injected into the wheel bearing to ensure good lubrication of the bearing and keep the wheel running stably for a long time.

[0004] In the related art, as shown in the Chinese invention patent with patent publication number CN116892676A, the patent provides an intelligent online oiling robot system for sintering trolley wheels, which solves the problems of low efficiency, easy oil leakage and difficult to ensure the oiling amount of manual oiling. However, when the technical solution of the patent is actually applied, it is found that the lubricating oil is easy to leak between the oiling gun head (i.e., the component indicated by the number 401 in Figure 4 of the patent) and the oil nozzle, resulting in waste of lubricating oil. Summary of the invention

[0005] The present application aims to at least to some extent solve the technical problem in the related art that lubricating oil leaks from between a grease gun head and a grease nozzle. To this end, the present application provides a grease gun head and a grease gun.

[0006] In a first aspect, an embodiment of the present application provides a grease gun head, which is mounted on a grease gun body. The grease gun body includes an electrically connected oil pump and a controller. The grease gun head includes:

[0007] A support seat is provided with a support seat flow channel, and the support seat is used to be connected to a grease gun body so that the support seat flow channel is connected to the grease gun body;

[0008] A sealing seat is slidably connected to the support seat and is provided with a sealing seat flow channel communicating with the support seat flow channel, and the sealing seat is used to dock with the oil nozzle;

[0009] A pressure sensor is located between the support seat and the sealing seat, and is used to detect the pressure applied by the oil nozzle to the sealing seat. The pressure sensor is used to be electrically connected to the controller so that the controller keeps the oil pump closed when the pressure value of the pressure sensor is less than a set value.

[0010] In some embodiments, the support seat includes a gun head sleeve and an inner top core, the inner top core is fixedly connected to the gun head sleeve, the gun head sleeve is used to connect to the grease gun body, and the support seat flow channel is opened on the inner top core; an installation groove for installing the pressure sensor and the sealing seat is formed between the gun head sleeve and the inner top core, the pressure sensor and the sealing seat are both located in the installation groove, and the sealing seat is slidably connected to the inner top core.

[0011] In some embodiments, the installation groove is an annular groove, the pressure sensor and the sealing seat are both sleeved on the inner top core, and the sealing seat is sealingly connected to the inner top core.

[0012] In some embodiments, the inner top core includes a connected fixing portion and a positioning portion, the fixing portion is threadedly connected to the gun head sleeve, and the mounting groove is formed between the positioning portion, the fixing portion and the gun head sleeve; the pressure sensor and the sealing seat are sleeved on the positioning portion, and the sealing seat is slidably connected to the positioning portion;

[0013] The grease gun head also includes a first sealing ring, which is sleeved on the positioning portion and is used to seal a radial gap between the positioning portion and the sealing seat.

[0014] In some embodiments, the grease gun head further comprises a second sealing ring, which is disposed on an end surface of the positioning portion close to the sealing seat and is used to seal a gap between the sealing seat and the end surface of the positioning portion;

[0015] The gun head sleeve is provided with a connection hole for connecting with the grease gun body.

[0016] In some embodiments, the grease gun head further comprises a limiter, the limiter is detachably connected to the support seat, and the pressure sensor and the sealing seat are clamped between the limiter and the support seat.

[0017] In some embodiments, a guide groove is provided on the sealing seat, the side wall of the guide groove is used to guide the oil nozzle, and the sealing seat flow channel is provided at the bottom of the guide groove;

[0018] The limiting member has a guide surface, and the guide surface is used to guide the oil nozzle, and the guide surface and the side wall of the guide groove have a smooth transition.

[0019] In some embodiments, the grease gun head further includes a pressure-bearing seat, and the pressure-bearing seat is located between the pressure sensor and the sealing seat.

[0020] In some embodiments, the pressure-bearing seat includes a connecting portion and a pressure-bearing portion that are connected, and the connecting portion and the pressure-bearing portion are arranged at an angle; the sealing seat includes a connected limiting portion and a force-applying portion; the connecting portion is sleeved outside the limiting portion, and the connecting portion is in contact with the force-applying portion; the pressure-bearing portion is located between the limiting portion and the pressure sensor, and the pressure-bearing portion is in contact with the pressure sensor; the pressure-bearing portion and the limiting portion are arranged at an interval so that a deformation avoidance cavity is formed between the limiting portion and the pressure-bearing portion.

[0021] In a second aspect, an embodiment of the present application further provides a grease gun, comprising a grease gun body and the grease gun head as described in the first aspect above, the grease gun body comprising an electrically connected controller and an oil pump, the grease gun head being mounted on the grease gun body via the support seat, the pressure sensor and the oil pump being electrically connected to the controller so that the controller keeps the oil pump closed when the pressure value of the pressure sensor is less than a set value.

[0022] The present invention has at least the following beneficial effects:

[0023] The grease gun head of the present invention includes a support seat, a sealing seat and a pressure sensor. The sealing seat is used to dock with the oil nozzle, and the pressure sensor is used to detect the pressure applied by the oil nozzle to the sealing seat, and the pressure sensor is electrically connected to the controller of the grease gun. Under the condition that the pressure value of the pressure sensor is less than the set value, the controller of the grease gun body controls the oil pump to remain in a closed state. In this way, after the sealing seat is docked with the oil nozzle, when the force applied by the oil nozzle to the sealing seat is greater than the set value, that is, when the sealing seat and the oil nozzle are tightly fitted, the oil pump can be turned on to inject oil, thereby avoiding the problem of injecting oil when the sealing seat is not docked with the oil nozzle or the docking is not tight, resulting in leakage of lubricating oil from between the sealing seat and the oil nozzle. The grease gun head of the present application helps to reduce the leakage of lubricating oil, save resources, and improve the efficiency of oil injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the structure of a grease gun head in one or more embodiments of the present application is shown.

[0026] Figure 2 A schematic diagram of the structure of the connection between the grease gun head and the grease nozzle in one or more embodiments of the present application is shown.

[0027] Figure 3A schematic diagram of the structure of a grease gun in one or more embodiments of the present application is shown.

[0028] Reference numerals: 1000-grease gun, 100-grease gun head, 110-support seat, 110a-support seat flow channel, 110b-installation groove, 110c-connection hole, 111-gun head sleeve, 112-inner top core, 1121-fixing part, 1122-positioning part, 120-sealing seat, 120a-sealing seat flow channel, 120b-guide groove, 120c-limiting groove, 121-limiting part, 1 22-force-applying part, 130-pressure sensor, 140-first sealing ring, 150-second sealing ring, 160-limiting member, 161-guide surface, 170-pressure-bearing seat, 171-connecting part, 172-pressure-bearing part, 172a-deformation avoidance chamber, 200-oil gun body, 210-oil pump, 220-controller, 230-housing, 240-oil pipe, 250-oil storage tank, 2000-oil nozzle. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] In the related art, as shown in the Chinese invention patent with patent publication number CN116892676A, the patent provides an intelligent online oiling robot system for sintering trolley wheels, which solves the problems of low efficiency, easy oil leakage and difficult to ensure the oiling amount of manual oiling. However, when the technical solution of the patent is actually applied, it is found that the lubricating oil will leak from the oiling gun head (the component indicated by the number 401 in Figure 4 of the patent) and the oil nozzle, resulting in waste of lubricating oil and unsuccessful oiling.

[0034] Therefore, in the related art, there is a technical problem that lubricating oil easily leaks from between the grease gun head and the oil nozzle. The embodiment of the present application provides a grease gun head and a grease gun, which can at least solve the technical problem that lubricating oil easily leaks from between the grease gun head and the oil nozzle to a certain extent.

[0035] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0036] The applicant has found that the reason for the leakage of lubricating oil from between the grease gun head and the grease nozzle is that the grease gun head and the grease nozzle are not tightly fitted when the grease is injected, which causes the lubricating oil to leak from the gap between the grease gun head and the grease nozzle.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, the grease gun head 100 is mounted on a grease gun body 200 , and the grease gun body 200 includes an oil pump 210 and a controller 220 that are electrically connected.

[0038] The grease gun head 100 provided in the present application can be applied to the Chinese invention patent with patent publication number CN116892676A. Of course, it can also be applied to other grease guns, grease guns, and grease gun bodies 200. The structure of the grease gun body 200 is diverse and is not limited in the present application. The grease gun body 200 is used to transfer lubricating oil to the grease gun head 100.

[0039] like Figure 3As shown, in some embodiments, the grease gun body 200 includes an oil pump 210, a controller 220, a housing 230, an oil tank 250, and an oil pipe 240. The oil pipe 240 connects the oil tank 250 and the support seat flow channel 110a of the grease gun head 100. The oil pump 210 is used to pump oil so that the lubricating oil in the oil tank 250 can be pumped into the oil pipe 240 and transmitted to the grease gun head 100 along the oil pipe 240. The controller 220 is electrically connected to the oil pump 210, and the controller 220 is used to control the operation of the oil pump 210. The housing 230 is used to support the oil pipe 240 and the grease gun head 110. In some schemes, the grease gun body 200 may also include components such as a solenoid valve, and the solenoid valve is electrically connected to the controller 220. The controller 220 is also used to control the opening and closing of the solenoid valve or control the opening degree of the electric control valve.

[0040] like Figure 1 As shown, the grease gun head 100 includes a support seat 110 , a sealing seat 120 and a pressure sensor 130 .

[0041] The support seat 110 is provided with a support seat flow channel 110 a , and the support seat 110 is used to be connected with the grease gun body 200 , so that the support seat flow channel 110 a is communicated with the grease gun body 200 .

[0042] The support seat 110 is fixedly connected to the grease gun body 200, and a support seat flow channel 110a is provided on the support seat 110, and the flow channel is communicated with the grease gun body 200, so that the lubricating oil in the grease gun body 200 can be transferred to the support seat flow channel 110a along the main flow channel. When the grease gun head 100 of the present application is applied to the Chinese invention patent with patent publication number CN116892676A, the support seat 110 is fixedly installed on the bearing sleeve of the patent (the number in the patent is 402), and the support seat flow channel 110a is communicated with the flow channel in the bearing sleeve.

[0043] The sealing seat 120 is slidably connected to the support seat 110 , and is provided with a sealing seat flow channel 120 a communicating with the support seat flow channel 110 a . The sealing seat 120 is used for docking with the oil nozzle 2000 .

[0044] The sealing seat 120 can slide along the support seat 110. Specifically, the sealing seat 120 can slide toward the side close to the pressure sensor 130 or toward the side away from the pressure sensor 130. The sealing seat 120 is provided with a sealing seat flow channel 120a, which is connected with the support seat flow channel 110a, so that the lubricating oil in the grease gun body 200 flows along the oil pipe 240, the support seat flow channel 110a and the sealing seat flow channel 120a.

[0045] like Figure 2As shown, the sealing seat 120 is used to dock with the oil nozzle 2000. Specifically, when the oil nozzle 2000 is filled with oil, the sealing seat 120 docks with the oil nozzle 2000 and presses against it, so that the sealing seat 120 and the oil nozzle 2000 are in close contact, so as to ensure the sealing between the oil nozzle 2000 and the sealing seat 120. After the sealing seat 120 docks with the oil nozzle 2000, the sealing seat flow channel 120a is connected with the oil nozzle 2000, and the lubricating oil can then enter the oil nozzle 2000 to fill the trolley waiting for the refueling device. The structure of the oil nozzle 2000 is not limited in this application, and the structure of the oil nozzle 2000 is known to those skilled in the art and will not be described in detail here.

[0046] The pressure sensor 130 is located between the support seat 110 and the sealing seat 120, and is used to detect the pressure applied by the oil nozzle 2000 to the sealing seat 120. The pressure sensor 130 is used to be electrically connected to the controller 220 so that the controller 220 keeps the oil pump 210 closed when the pressure value of the pressure sensor 130 is less than the set value.

[0047] As mentioned above, when the sealing seat 120 is docked with the oil nozzle 2000, the sealing seat 120 must be pressed tightly against the oil nozzle 2000, so the sealing seat 120 will apply a certain pressure to the oil nozzle 2000. The pressure applied by the oil nozzle 2000 to the sealing seat 120 refers to the reaction force applied by the oil nozzle 2000 to the sealing seat 120. It is easy to understand that the reaction force is the same in magnitude and opposite in direction to the pressure applied by the seal on the oil nozzle 2000.

[0048] Since the sealing seat 120 is slidably connected to the support seat 110, and the pressure sensor 130 is located between the support seat 110 and the limit member 160, when the sealing seat 120 is docked with the oil nozzle 2000, the sealing seat 120 will slide toward the direction of the pressure sensor 130, thereby squeezing the pressure sensor 130, so that the pressure sensor 130 can detect the pressure applied by the oil nozzle 2000 to the sealing seat 120.

[0049] When the pressure value detected by the pressure sensor 130 is small and is less than the set value, it means that the sealing seat 120 and the oil nozzle 2000 are not tightly fitted, and the lubricating oil is easy to flow out from the gap between the sealing seat 120 and the oil nozzle 2000, causing waste and unsuccessful oil injection. When the pressure value detected by the pressure sensor 130 is greater than or equal to the set value, it means that the sealing seat 120 and the oil nozzle 2000 are tightly fitted, and the lubricating oil is not easy to flow out from the gap between the sealing seat 120 and the oil nozzle 2000.

[0050] The pressure sensor 130 is electrically connected to the controller 220, so that the controller 220 keeps the oil pump 210 closed when the pressure value is less than the set value, because when refueling, the sealing seat 120 and the oil nozzle 2000 are not tightly fitted, and even if the oil is filled, the lubricant will leak from between the sealing seat 120 and the oil nozzle 2000, resulting in unsuccessful oil filling and waste of lubricating oil. On the contrary, when the pressure value is greater than the set value, the controller 220 allows the oil pump 210 to be turned on. At this time, when refueling, the sealing seat 120 and the oil nozzle 2000 are tightly fitted, and the lubricating oil can smoothly enter the oil nozzle 2000, and it is not easy to flow out from the gap between the sealing seat 120 and the oil nozzle 2000, ensuring successful oil filling.

[0051] After the present application is designed in this way, when the sealing seat 120 and the oil nozzle 2000 are not tightly fitted, the oil pump 210 remains closed under the action of the controller 220, which reduces the leakage of lubricating oil from between the oil filling gun head and the oil nozzle 2000 to a certain extent, helping to save lubricating oil.

[0052] When the grease gun head 100 of the present application is used in the Chinese invention patent with patent publication number CN116892676A, the controller 220 can also be electrically connected to the control system of the robot system in the patent (the patent is labeled 3) so that when the pressure value is less than the set value, the robot system can be controlled to operate so that the sealing seat 120 fits tightly on the oil nozzle so that the pressure value is greater than or equal to the set value.

[0053] The specific size of the set value is not limited in this application. The size of the set value is related to the shape, material and size of the sealing seat 120, and the user can make an adaptive design according to the specific situation.

[0054] The sealing seat 120 is usually made of a flexible material and can be deformed to a certain extent after being subjected to an external force so that the sealing seat 120 can fit tightly with the oil nozzle 2000. The sealing seat 120 can be made of a material such as tetrafluoroethylene or rubber.

[0055] In addition, the structure of the pressure sensor 130 is well known to those skilled in the art and will not be elaborated here.

[0056] In some embodiments, the support seat 110 includes a gun head sleeve 111 and an inner top core 112, the inner top core 112 is fixedly connected to the gun head sleeve 111, the gun head sleeve 111 is used to connect with the grease gun body 200, and the support seat flow channel 110a is opened on the inner top core 112; an installation groove 110b for installing the pressure sensor 130 and the sealing seat 120 is formed between the gun head sleeve 111 and the inner top core 112, the pressure sensor 130 and the sealing seat 120 are both located in the installation groove 110b, and the sealing seat 120 is slidably connected to the inner top core 112.

[0057] In these embodiments, the support seat 110 includes a gun head sleeve 111 and an inner top core 112. The support seat 110 is a split structure, so that the gun head sleeve 111 and the inner top core 112 can be processed separately and then assembled together to form the support seat 110, which facilitates the processing of the support seat 110. The gun head sleeve 111 and the inner top core 112 are surrounded to form a mounting groove 110b, and the sealing seat 120 and the pressure sensor 130 are both located in the mounting groove 110b. The setting of the mounting groove 110b can limit the sealing seat 120 and the pressure sensor 130 on the one hand, and on the other hand, the side wall of the mounting groove 110b can provide protection for the pressure sensor 130 and the sealing seat 120, avoiding the pressure sensor 130 and the sealing seat 120 from being damaged by collision with external components, which helps to extend the service life of the grease gun head 100 of the present application.

[0058] It should be noted that in these embodiments, the pressure sensor 130 is located at one side of the bottom of the mounting groove 110b, and the pressure sensor 130 is in contact with the bottom of the mounting groove 110b, and the sealing seat 120 is located at one side of the notch of the mounting groove 110b, so as to ensure that after the sealing seat 120 is docked with the oil nozzle, a force can be applied to the pressure sensor 130. With such a design, the sealing seat 120 can block the notch of the mounting groove 110b, so that the pressure sensor 130 is in a closed chamber. The pressure sensor 130 is a relatively compact electronic device, which can prevent external water vapor, dust or lubricating oil from adhering to the pressure sensor 130 and interfering with the measurement of the pressure sensor 130, which helps to ensure the continuous and stable operation of the pressure sensor 130.

[0059] There are various ways to fix the inner top core 112 and the gun head sleeve 111, which can be welding, bonding, clamping, threaded connection, etc.

[0060] In some embodiments, the inner top core 112 is provided with an outer thread, the gun head sleeve 111 is provided with an inner thread, and the inner top core 112 is threadedly connected to the gun head sleeve 111. The inner top core 112 and the gun head sleeve 111 are threadedly connected by threads, so that the inner top core 112 and the gun head sleeve 111 can be disassembled and separated. In addition, due to the sealing performance of the threads, the threaded connection method can seal the gap between the gun head sleeve 111 and the inner top core 112, preventing external water vapor, dust, etc. from entering the installation groove 110b through the gap between the gun head sleeve 111 and the inner top core 112, which helps to ensure the continuous and stable operation of the pressure sensor 130.

[0061] There are also various ways to connect the gun head sleeve 111 to the grease gun body 200, such as clamping, threading, welding, etc. In some embodiments, the gun head sleeve 111 is provided with a plurality of connection holes 110c connected to the grease gun body 200 at intervals, and bolts, screws and other connecting parts are threadedly connected to the grease gun body 200 after passing through the connection holes 110c, so that the gun head sleeve 111 is fixedly connected to the grease gun body 200.

[0062] In some embodiments, the mounting groove 110 b is an annular groove, the pressure sensor 130 and the sealing seat 120 are both sleeved on the inner top core 112 , and the sealing seat 120 is sealingly connected to the inner top core 112 .

[0063] In these embodiments, the pressure sensor 130 and the sealing seat 120 are both annular, the inner hole of the pressure sensor 130 is sleeved on the inner top core 112, and the inner hole of the sealing seat 120 is also sleeved on the inner top core 112. The sealing seat 120 is sealed and connected to the inner top core 112 to prevent the lubricating oil from leaking through the gap between the sealing seat 120 and the inner top core 112, causing lubricating oil waste, and at the same time, it can prevent the lubricating oil from leaking into the installation groove 110b, contaminating the pressure sensor 130, causing the pressure sensor 130 to be damaged by the lubricating oil, etc.

[0064] In some embodiments, the outer wall of the sealing seat 120 fits tightly against the inner wall of the gun head sleeve 111 to prevent external water vapor from entering the installation groove 110b through the gap between the sealing seat 120 and the gun head sleeve 111 and affecting the normal operation of the pressure sensor 130.

[0065] In some embodiments, the inner top core 112 includes a connected fixing portion 1121 and a positioning portion 1122, the fixing portion 1121 is threadedly connected to the gun head sleeve 111, and the positioning portion 1122, the fixing portion 1121 and the gun head sleeve 111 form an installation groove 110b; the pressure sensor 130 and the sealing seat 120 are sleeved on the positioning portion 1122, and the sealing seat 120 is slidingly connected to the positioning portion 1122; the grease gun head 100 also includes a first sealing ring 140, which is sleeved on the positioning portion 1122 for sealing the radial gap between the positioning portion 1122 and the sealing seat 120.

[0066] The fixing portion 1121 and the positioning portion 1122 of the inner top core 112 are fixedly connected. In some embodiments, the fixing portion 1121 and the positioning portion 1122 are integrally formed.

[0067] The fixing portion 1121 is used for threaded connection with the gun head sleeve 111. Specifically, the outer peripheral surface of the fixing portion 1121 is provided with an external thread, and the gun head sleeve 111 is provided with an internal thread, and the fixing portion 1121 is threadedly connected in the gun head sleeve 111. With this design, the inner top core 112 and the gun head sleeve 111 are threadedly connected by means of threads, so that the inner top core 112 and the gun head sleeve 111 can be disassembled and separated. In addition, due to the sealing performance of the threads, the threaded connection method can seal the gap between the gun head sleeve 111 and the fixing portion 1121, preventing external water vapor, dust, etc. from entering the installation groove 110b through the gap between the gun head sleeve 111 and the fixing portion 1121, which helps to ensure the continuous and stable operation of the pressure sensor 130.

[0068] The positioning portion 1122 is used to sleeve the sealing seat 120 and the pressure sensor 130. The first sealing ring 140 is sleeved on the positioning portion 1122 to seal the radial gap between the positioning portion 1122 and the sealing seat 120 so that the sealing seat 120 is sealed and connected to the inner top core 112.

[0069] In some embodiments, the grease gun head 100 further includes a second sealing ring 150 , which is disposed on an end surface of the positioning portion 1122 close to the sealing seat 120 , and is used to seal a gap between the sealing seat 120 and an end surface of the positioning portion 1122 .

[0070] The second sealing ring 150 is disposed on the end surface of the positioning portion 1122 close to the sealing seat 120. Figure 1 As shown, the second sealing ring 150 is disposed at the right end of the positioning portion 1122, and is used to seal the gap between the sealing seat 120 and the end surface of the positioning portion 1122. With this design, the grease gun head 100 seals the gap between the sealing seat 120 and the positioning portion 1122 through the first sealing ring 140 and the second sealing ring 150, which helps to improve the sealing performance between the sealing seat 120 and the positioning portion 1122.

[0071] In some embodiments, a first sealing ring installation groove is defined on the outer periphery of the positioning portion 1122 , and the first sealing ring 140 is installed in the first sealing ring installation groove.

[0072] In some embodiments, a limiting groove 120c is opened at one end of the sealing seat 120 close to the positioning portion 1122, and the sealing seat flow channel 120a is arranged at the bottom of the limiting groove 120c. The shape of the limiting groove 120c is adapted to the shape of the positioning portion 1122. The positioning portion 1122 is located in the installation groove 110b, and the first sealing ring 140 is in contact with the peripheral wall of the limiting groove 120c. The second sealing ring 150 is arranged at the bottom of the limiting groove 120c and is in contact with the bottom of the limiting groove 120c.

[0073] In some embodiments, the grease gun head 100 further includes a limiter 160 , which is detachably connected to the support seat 110 , and the pressure sensor 130 and the sealing seat 120 are clamped between the limiter 160 and the support seat 110 .

[0074] When the stopper 160 is connected to the support seat 110, the stopper 160 can contact the sealing seat 120, so that the pressure sensor 130 and the sealing seat 120 are clamped between the support seat 110 and the stopper 160, preventing the sealing seat 120 and the pressure sensor 130 from being separated from the positioning portion 1122 of the support seat 110. When the stopper 160 is separated from the support seat 110, the stopper 160 does not limit the sealing seat 120, and the sealing seat 120 can be removed from the positioning portion 1122 of the support seat 110, which facilitates the installation and removal of the sealing seat 120 and the pressure sensor 130. The provision of the stopper 160 helps to ensure the stability of the connection between the sealing seat 120 and the support seat 110, and prevents the sealing seat 120 from being separated from the support seat 110 due to the action of the oil nozzle 2000 during the docking process with the oil nozzle 2000.

[0075] The detachable connection between the stopper 160 and the support seat 110 may be threaded connection, clamping connection, threaded connection, etc. In some embodiments, the inner wall of the stopper 160 on the side of the gun head sleeve 111 close to the support seat 110 is provided with an internal thread, and the outer wall of the gun head sleeve 111 of the support seat 110 is provided with an external thread, and the side of the stopper 160 close to the gun head sleeve 111 is sleeved on the outside of the gun head sleeve 111 and threadedly connected with the gun head sleeve 111. After such a design, after the pressure sensor 130 and the sealing seat 120 are sleeved on the inner top core 112 in turn, the stopper 160 is threadedly connected to the gun head sleeve 111, so that the pressure sensor 130 and the sealing seat 120 are clamped between the stopper 160 and the support seat 110 to prevent the sealing seat 120 from detaching from the inner top core 112.

[0076] In some embodiments, a guide groove 120b is provided on the sealing seat 120, and the side wall of the guide groove 120b is used to guide the oil nozzle 2000. The sealing seat flow channel 120a is arranged at the bottom of the guide groove 120b of the sealing seat 120; the limiting member 160 has a guide surface 161, and the guide surface 161 is used to guide the oil nozzle 2000, and the guide surface 161 smoothly transitions with the side wall of the guide groove 120b.

[0077] The guide groove 120b is used to guide the oil nozzle 2000 so that the oil inlet end of the oil nozzle 2000 can quickly connect with the sealing seat flow channel 120a. The inner wall of the guide groove 120b is conical, and the end close to the sealing seat flow channel 120a is the small end, and the end away from the sealing seat flow channel 120a is the large end. The guide surface 161 of the limiter 160 is also used for guiding, and the guide surface 161 and the side wall of the guide groove 120b have a smooth transition, so that the oil nozzle 2000 can enter the guide groove 120b along the guide surface 161. The guide surface 161 is a conical surface, and the end close to the sealing seat flow channel 120 is the small end, and the end away from the sealing seat 120 is the large end. Specifically, the small end of the guide surface 161 smoothly transitions with the large end of the sealing seat 120.

[0078] The size and shape of the bottom of the guide groove 120b are adapted to the size and shape of the oil inlet end of the oil nozzle 2000, and are not limited in this application. Figure 2 As shown, in some embodiments, the oil inlet end of the oil nozzle 2000 is spherical and has a spherical surface, the bottom of the guide groove 120b is semicircular, the diameter of the bottom of the guide groove 120b is the same as the diameter of the spherical surface on the oil inlet end of the oil nozzle 2000, and the spherical surface of the oil nozzle 2000 fits tightly on the semicircular bottom of the guide groove 120b.

[0079] In some embodiments, the grease gun head 1000 further includes a pressure-bearing seat 170 , which is located between the pressure sensor 130 and the sealing seat 120 .

[0080] Since the sealing seat 120 is usually made of a flexible material such as rubber, when the sealing seat 120 is docked with the oil nozzle 2000, the pressure distribution on various parts of the sealing seat 120 is uneven. After the pressure-bearing seat 170 is provided, the pressure-bearing seat 170 contacts the pressure sensor 130. The pressure-bearing seat 170 is used to bear the pressure on the sealing seat 120 and transmit the pressure to the pressure sensor 130. The provision of the pressure-bearing seat 170 helps to evenly distribute the pressure on the sealing seat 120 on the pressure-bearing seat 170, so that the pressure sensor 130 receives uniform pressure at various parts, which helps to ensure the accuracy of the detection of the pressure sensor 130.

[0081] In some embodiments, the pressure-bearing seat 170 includes a connected connecting portion 171 and a pressure-bearing portion 172, and the connecting portion 171 and the pressure-bearing portion 172 are arranged at an angle; the sealing seat 120 includes a connected limiting portion 121 and a force-applying portion 122; the connecting portion 171 is sleeved outside the limiting portion 121, and the connecting portion 171 is in contact with the force-applying portion 122; the pressure-bearing portion 172 is located between the limiting portion 121 and the pressure sensor 130, the pressure-bearing portion 172 is in contact with the pressure sensor 130, and the pressure-bearing portion 172 and the limiting portion 121 are arranged at an interval so that a deformation avoidance cavity 172a is formed between the limiting portion 121 and the pressure-bearing portion 172.

[0082] It should be noted that the connecting portion 171 is arranged on a side of the pressure-bearing portion 172 away from the positioning portion 1122. The connecting portion 171 and the pressure-bearing portion 172 are fixedly connected. In some embodiments, the connecting portion 171 and the pressure-bearing portion 172 are integrally formed. The connecting portion 171 and the pressure-bearing portion 172 may be arranged at a right angle, an obtuse angle, or an acute angle. In some embodiments, the connecting portion 171 and the pressure-bearing portion 172 are arranged at a right angle. The limiting portion 121 and the force-applying portion 122 are fixedly connected. In some embodiments, the limiting portion 121 and the force-applying portion 122 are integrally formed.

[0083] In these embodiments, the connection portion 171 is sleeved outside the limiting portion 121, the connection portion 171 is in contact with the force-applying portion 122, and the sealing seat 120 applies a force to the connection portion 171 through the force-applying portion 122. The pressure-bearing portion 172 is located between the limiting portion 121 and the pressure sensor 130, and the pressure-bearing portion 172 is in contact with the pressure sensor 130, so that the pressure-bearing portion 172 applies a force to the pressure sensor 130. In these embodiments, the pressure-bearing portion 172 is spaced from the limiting portion 121, and a deformation avoidance cavity 172a is formed between the pressure-bearing portion 172 and the limiting portion 121.

[0084] The sealing seat 120 is usually made of a flexible material, which will deform when under pressure and can better fit the oil nozzle 2000. By setting the deformation avoidance cavity 172a, after the sealing seat 120 contacts the oil nozzle 2000, the sealing seat 120 can be deformed in the deformation avoidance cavity 172a, which helps to make the sealing seat 120 deform under a smaller force, so that the sealing seat 120 can fit more closely with the oil nozzle 2000.

[0085] In these embodiments, the guide groove 120 b is formed on the force applying portion 122 .

[0086] Based on the same inventive concept, the embodiment of the present application also provides a grease gun 1000, which includes a grease gun body 200 and the above-mentioned grease gun head 100, the grease gun body 200 includes an electrically connected controller 220 and an oil pump 210, the grease gun head 100 is installed on the grease gun body 200 through a support seat 110, and the pressure sensor 130 and the oil pump 210 are both electrically connected to the controller 220, so that the controller 220 keeps the oil pump 210 closed when the pressure value of the pressure sensor 130 is less than the set value.

[0087] The function of the oil pump 210 of the grease gun body 200 is to pump lubricating oil into the support seat flow channel 110a of the support seat 110, and the function of the controller 220 is to control the opening and closing of the oil pump 210. Specifically, the pressure sensor 130 will feedback pressure value information to the controller 220, and the controller 220 controls the opening and closing of the oil pump 210 according to the pressure value information. Specifically, when the pressure value is less than the set value, the oil pump 210 is kept closed.

[0088] The structure of the grease gun 1000 is diverse. In some embodiments, the grease gun body 200 also includes a shell 230, an oil storage tank 250 and an oil pipe 240. The oil pipe 240 is connected to the oil storage tank 250 and the support seat flow channel 110a of the grease gun head 100. The end of the oil pipe 240 connected to the support seat flow channel 110a is installed on the shell 230, and the support seat 110 is installed on the shell 230. The oil storage tank 250 is used to store lubricating oil, and the oil pump 210 is used to pump the lubricating oil in the oil storage tank 250 into the oil pipe 240.

[0089] The outer shell 230 is used to support the oil pipe 240 and the grease gun head 110. In some embodiments, a gripping portion is provided on the outer shell 230 for the user to hold. The user can hold the gripping portion and move the outer shell 230 and the grease gun head 110 thereon to dock the sealing seat 120 with the oil nozzle 2000 to facilitate the oil filling operation.

[0090] Since the grease gun 1000 includes the grease gun head 100 described above in the present application, it naturally has all the beneficial effects of the grease gun head 100 of the present application, which will not be elaborated here.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0092] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0093] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A grease gun head (100), characterized in that: Installed on a grease gun body (200), the grease gun body (200) includes an electrically connected oil pump (210) and a controller (220), and the grease gun head (100) includes: A support seat (110) is provided with a support seat flow channel (110a), and the support seat (110) is used to be connected to a grease gun body (200) so that the support seat flow channel (110a) is in communication with the grease gun body (200); A sealing seat (120) is slidably connected to the support seat (110) and is provided with a sealing seat flow channel (120a) communicating with the support seat flow channel (110a); the sealing seat (120) is used for docking with the oil nozzle (2000); A pressure sensor (130) is located between the support seat (110) and the sealing seat (120) and is used to detect the pressure applied by the oil nozzle (2000) to the sealing seat (120). The pressure sensor (130) is used to be electrically connected to the controller (220) so that the controller (220) keeps the oil pump (210) closed when the pressure value of the pressure sensor (130) is less than a set value.

2. The grease gun head (100) according to claim 1, characterized in that: The support seat (110) comprises a gun head sleeve (111) and an inner top core (112), wherein the inner top core (112) is fixedly connected to the gun head sleeve (111), and the gun head sleeve (111) is used to be connected to the grease gun body (200), and the support seat flow channel (110a) is opened on the inner top core (112); an installation groove (110b) for installing the pressure sensor (130) and the sealing seat (120) is formed between the gun head sleeve (111) and the inner top core (112), and the pressure sensor (130) and the sealing seat (120) are both located in the installation groove (110b), and the sealing seat (120) is slidably connected to the inner top core (112).

3. The grease gun head (100) according to claim 2, characterized in that: The installation groove (110b) is an annular groove, the pressure sensor (130) and the sealing seat (120) are both sleeved on the inner top core (112), and the sealing seat (120) is sealingly connected to the inner top core (112).

4. The grease gun head (100) according to claim 3, characterized in that: The inner top core (112) comprises a connected fixing portion (1121) and a positioning portion (1122); the fixing portion (1121) is threadedly connected to the gun head sleeve (111); the mounting groove (110b) is formed between the positioning portion (1122), the fixing portion (1121) and the gun head sleeve (111); the pressure sensor (130) and the sealing seat (120) are sleeved on the positioning portion (1122); the sealing seat (120) is slidably connected to the positioning portion (1122); The grease gun head (100) further comprises a first sealing ring (140), wherein the first sealing ring (140) is sleeved on the positioning portion (1122) and is used to seal a radial gap between the positioning portion (1122) and the sealing seat (120).

5. The grease gun head (100) according to claim 4, characterized in that: The grease gun head (100) further comprises a second sealing ring (150), wherein the second sealing ring (150) is arranged on an end surface of the positioning portion (1122) close to the sealing seat (120) and is used to seal a gap between the sealing seat (120) and an end surface of the positioning portion (1122); The gun head sleeve (111) is provided with a connection hole (110c) for connecting with the grease gun body (200).

6. The grease gun tip (100) according to any one of claims 1 to 5, characterized in that: The grease gun head (100) further comprises a limiting member (160), wherein the limiting member (160) is detachably connected to the support seat (110), and the pressure sensor (130) and the sealing seat (120) are clamped between the limiting member (160) and the support seat (110).

7. The grease gun head (100) according to claim 6, characterized in that: The sealing seat (120) is provided with a guide groove (120b), the side wall of the guide groove (120b) is used to guide the oil nozzle (2000), and the sealing seat flow channel (120a) is provided at the bottom of the guide groove (120b); The limiting member (160) has a guide surface (161), and the guide surface (161) is used to guide the oil nozzle (2000), and the guide surface (161) smoothly transitions with the side wall of the guide groove (120b).

8. The grease gun tip (100) according to any one of claims 1 to 5, characterized in that: The grease gun head (100) further comprises a pressure-bearing seat (170), wherein the pressure-bearing seat (170) is located between the pressure sensor (130) and the sealing seat (120).

9. The grease gun head (100) according to claim 8, characterized in that: The pressure-bearing seat (170) comprises a connecting portion (171) and a pressure-bearing portion (172) which are connected, and the connecting portion (171) and the pressure-bearing portion (172) are arranged at an angle; the sealing seat (120) comprises a limiting portion (121) and a force-applying portion (122) which are connected; the connecting portion (171) is sleeved outside the limiting portion (121), and the connecting portion (171) is in contact with the force-applying portion (122); the pressure-bearing portion (172) is located between the limiting portion (121) and the pressure sensor (130), and the pressure-bearing portion (172) is in contact with the pressure sensor (130); the pressure-bearing portion (172) and the limiting portion (121) are arranged at an interval, so that a deformation avoidance cavity (172a) is formed between the limiting portion (121) and the pressure-bearing portion (172).

10. A grease gun (1000), characterized in that: The grease gun (1000) comprises a grease gun body (200) and the grease gun head (100) according to any one of claims 1 to 9, the grease gun body (200) comprises an electrically connected controller (220) and an oil pump (210), the grease gun head (100) is mounted on the grease gun body (200) via the support seat (110), the pressure sensor (130) and the oil pump (210) are both electrically connected to the controller (220), so that the controller (220) keeps the oil pump (210) closed when the pressure value of the pressure sensor (130) is less than a set value.

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