Lubricating structure of gun needle lifting mechanism and nail gun

Abstract

The invention discloses a lubricating structure of a gun needle lifting mechanism and a nail gun, belongs to the technology of nailing tools, and aims to solve the problem that wear is easily caused by high-frequency contact and meshing of a lifting component and a gun needle of an existing nail gun. An oil injection nozzle is arranged on a lifting wheel, and a grease channel from the oil injection nozzle to a lifting part is distributed in a wheel body; lubricating grease can be injected into the grease channel through the grease injection nozzle, the lifting part is lubricated through the lubricating grease, abrasion caused by meshing of the lifting part and the teeth is reduced and delayed, the service life is prolonged, and the lifting part and the teeth can be precisely matched for a long time. In addition, during the use period after delivery, lubricating grease can be supplemented to the grease channel through the oil injection nozzle.

Description

Technical Field

[0001] The invention belongs to the technology of nailing tools. The nailing tools are used to drive nails into positions such as wooden boards and walls, and particularly relate to a lubrication structure of a gun needle lifting mechanism and a nail gun. Background Art

[0002] The electric nail guns on the market that are used to drive nails into wooden boards, walls, etc., use gas springs as the power source. When nailing, the motor relies on electricity (such as replaceable batteries) to drive the lifting component, which lifts the gun needle and compresses the gas spring. The lifting component lifts the gun needle to a preset position and then releases the gun needle. The gun needle moves to nail with the elastic force of the gas spring. The motor continues to rotate, and the gun needle will be lifted and nailed one by one.

[0003] In this nail gun, when the gun needle is lifted, the lifting component and the gun needle are in high-frequency contact and meshing contact, such as the contact and meshing of the first engaging portion and the second engaging portion in the invention patent application with application publication number CN113490574A, the contact and meshing of the non-full-circumference gear and the rack-type gun needle in the invention patent application with application publication number CN113070849A, and the contact and meshing of the meshing cylinder and the meshing teeth in the invention patent application with application publication number CN110253503A.

[0004] Therefore, in order to maintain the precise fit between the lifting component and the gun needle, delay wear and extend service life, providing lubrication for the gun needle lifting mechanism is a prerequisite and guarantee. Summary of the invention

[0005] The technical problem to be solved and the technical task proposed by the present invention is to overcome the defect that the lifting component of the existing nail gun and the gun needle are easily worn due to high-frequency contact and engagement, and to provide a lubrication structure of the gun needle lifting mechanism and a nail gun to provide lubrication for the gun needle lifting mechanism, ensure that the lifting component and the gun needle maintain precise cooperation, delay wear and extend service life.

[0006] In order to achieve the above-mentioned object, the lubrication structure of the needle lifting mechanism of the present invention comprises:

[0007] A lifting wheel for lifting a gun needle, comprising a rotating shaft and a wheel body rotating with the rotating shaft, wherein the circumference of the wheel body comprises a first angle range and a second angle range, wherein a plurality of lifting parts are distributed in the first angle range so that when the lifting wheel rotates to teeth corresponding to the gun needle distributed in the first angle range, the lifting parts are meshed with the teeth to lift the gun needle, and no lifting parts are distributed in the second angle range so that when the lifting wheel rotates to teeth corresponding to the gun needle distributed in the second angle range, the lifting parts are disengaged from the teeth to release the gun needle;

[0008] Among them, a grease nozzle is arranged on the lifting wheel, and a grease channel from the grease nozzle to the lifting part is distributed in the wheel body.

[0009] Accordingly, lubricating grease is injected into the grease channel through the grease injection nozzle, and the lifting part is lubricated by the grease, which reduces and delays the wear of the lifting part and the tooth meshing, prolongs the service life, and enables the lifting part and the tooth to maintain a long-term precise fit. Moreover, during the use period after leaving the factory, the grease channel can be supplemented with lubricating grease through the grease injection nozzle.

[0010] In order to ensure that the lubricating grease can fully lubricate the lifting part, the lifting part is a pin assembled on the wheel body, and each pin is located at the end of a grease channel.

[0011] In order to prevent the loss of lubricating grease, especially to prevent the lubricating grease from being thrown out of the grease channel due to centrifugal force when the lifting wheel rotates, an axial groove is provided on the periphery of the wheel body, and the ports of the grease channel are connected to the axial groove, and the pins are located in the corresponding axial grooves. Accordingly, when the lifting wheel rotates, the pins can block the ports of the grease channel to prevent the lubricating grease from being thrown out due to centrifugal force.

[0012] In order to ensure the meshing of the lifting part and the teeth, the wheel body includes two spaced walls, a gap is formed between the two spaced walls, the periphery of the wheel body is located at the bottom of the gap, the two ends of the pin are assembled on the two spaced walls, and the middle of the pin is located in the gap. Accordingly, when the lifting part meshes with the teeth to lift the gun needle, the two spaced walls constrain and guide the gun needle in the gap, which has a supporting effect on the gun needle and prevents the gun needle from swinging.

[0013] In order to fully lubricate the pin, the pin is movably mounted in the hole of the lifting wheel so that the pin can be shifted during the meshing process between the pin and the tooth, allowing the lubricating grease to adhere to different parts of the pin.

[0014] In order to prevent the movably assembled pin from being separated from the lifting wheel, the end surface of the lifting wheel is covered with a cover plate, which constrains the pin in the hole of the lifting wheel.

[0015] In order to ensure that the lifting part of the lifting wheel can accurately mesh with the teeth of the gun needle and avoid deviation, a movable part is arranged on the lifting wheel, and the movable part is arranged to change position as the lifting wheel rotates to adjust the lifting part to accurately mesh with the teeth distributed on the gun needle; a grease channel distributed in the wheel body from the grease nozzle to the movable part is used to inject lubricating grease to lubricate the movable part.

[0016] Furthermore, an arc groove is provided on the periphery of the wheel body, the movable part is located in the arc groove through its arc rotating part, and the port of the grease channel is connected to the arc groove. Accordingly, the lubricating grease from the grease channel can lubricate the movement of the movable part itself and the cooperation between the movable part and the gun needle.

[0017] In order to prevent the movable part from deviating from the position when it cooperates with the gun needle, the wheel body includes two spaced walls, a gap is formed between the two spaced walls, the periphery of the wheel body is located at the bottom of the gap, the movable part is located in the gap, and the movable part is rotatably assembled on the two spaced walls through the pinion. Accordingly, when the lifting part engages with the teeth to lift the gun needle, the two spaced walls constrain and guide the gun needle and the movable part in the gap, which has a supporting effect on the gun needle to prevent the gun needle from swinging, and has a limiting effect on the movable part to prevent the movable part from deviating from the position cooperating with the gun needle.

[0018] In order to facilitate processing and enable the lubricating grease to be filled into each grease channel when the lubricating grease is injected into the grease channel through the grease injection nozzle, the grease channels are radially distributed from the center of the wheel body.

[0019] An axial hole is arranged in the rotating shaft, the axial hole is connected to the grease channel, and a grease nozzle is arranged at one end of the rotating shaft. Accordingly, when the grease nozzle rotates with the lifting wheel, the dynamic balance of the lifting wheel can be maintained, and the position is determined, which is convenient for connecting an external device such as a grease gun to fill the lubricating grease.

[0020] In order to prevent the lubricating grease from leaking out of the oil filling nozzle, the oil filling nozzle includes a cap, a ball and a spring. The cap has an oil filling hole. The ball is supported by the spring and blocks the oil filling hole, so that the oil filling nozzle presents a one-way valve that can only inject grease into the grease channel.

[0021] To achieve the above object, the nail gun of the present invention comprises:

[0022] A gun needle lifting mechanism, which includes a gun needle and a lifting wheel for lifting the gun needle, the gun needle is provided with a plurality of teeth along its length direction, and the gun needle lifting mechanism is provided with the lubrication structure of the present invention;

[0023] A motor for driving the lifting wheel to rotate;

[0024] A cylinder, a piston is arranged in the cylinder, a gun needle is connected to the piston and extends downward, and a gas spring is arranged on the upper side of the piston for pushing the piston to move downward;

[0025] The nail magazine is used to store nails and transport the stored nails to the lower end position of the gun needle.

[0026] Accordingly, when the nail gun is nailing, the meshing parts of the lifting wheel and the gun needle can be lubricated, reducing and delaying the wear of the lifting part and the tooth meshing, extending the service life, and enabling the lifting part and the tooth to maintain long-term precise matching.

[0027] In order to facilitate the replenishment of lubricating grease to the grease channel through the grease injection nozzle, the grease injection nozzle is hidden in the machine body, and a through hole corresponding to the grease injection nozzle is provided on the machine body, and a cover is arranged on the through hole.

[0028] The present invention arranges an oiling nozzle on the lifting wheel, and a grease channel from the oiling nozzle to the lifting part is distributed in the wheel body. Lubricating grease can be injected into the grease channel through the oiling nozzle, and the lifting part is lubricated by the lubricating grease, thereby reducing and delaying the wear of the lifting part and the tooth meshing, extending the service life, and maintaining a long-term accurate fit between the lifting part and the tooth. Moreover, during the use period after leaving the factory, the lubricating grease can be added to the grease channel through the oiling nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an isometric view of a nail gun of the present invention;

[0030] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of the nail gun shown;

[0031] Figure 3 for Figure 2 AA section view, in which the gun needle is lifted to a high position by the lifting wheel;

[0032] Figure 4 for Figure 3 An enlarged view of the lifting wheel and the gun needle;

[0033] Figure 5 for Figure 4 A schematic diagram of the lifting wheel releasing the gun needle so that the gun needle descends from a high position to nail;

[0034] Figure 6 for Figure 5 Schematic diagram of the gun needle dropping to the lowest position for nailing;

[0035] Figure 7 for Figure 6 A schematic diagram showing that when the lifting wheel continues to rotate, the force-bearing portion of the movable member is blocked by the teeth, causing the movable member to move from the first position to the second position;

[0036] Figure 8 for Figure 7 A schematic diagram of the movable member in the gun moving to the second position so that the meshing portion is located at the meshing position and meshes with the teeth on the gun needle;

[0037] Fig. 9 It is a schematic diagram of the gun needle not falling to the lowest position after nailing and being adjusted by the movable part so that the lifting part and the teeth are accurately engaged;

[0038] Fig.10 A schematic diagram of a lifting wheel of a structure of the present invention;

[0039] Fig.11 for Fig.10 A schematic diagram from another perspective;

[0040] Fig.12 for Fig.10The structural exploded diagram of the lifting wheel shown;

[0041] Fig.13 for Fig.12 A schematic diagram showing another perspective of the structure of the lifting wheel;

[0042] Fig.14 It is a schematic diagram of the assembly structure of the driving device, air pump and air cylinder of the present invention;

[0043] Fig.15 A schematic diagram of a drive device driving a gun needle lifting mechanism;

[0044] Fig.16 A schematic diagram of a grease nozzle configured for the lifting wheel of the present invention;

[0045] Fig.17 for Fig.16 a schematic orthographic projection of one view of the structure shown;

[0046] Fig.18 for Fig.17 BB section view;

[0047] Fig.19 for Fig.18 CC section view;

[0048] Description of the numbers in the figure:

[0049] 100 Gun needle lifting mechanism:

[0050] 110 needle, 111 teeth, S pitch,

[0051] 120 lifting wheel, 121 lifting part, 122 wall, 123 gap, 124 cover plate, 125 arcuate through hole, 126 rod, 127 shaft, 128 wheel body, 129 grease channel, 1210 axial groove, 1211 end of grease channel, 1212 hole, 1213 arcuate groove, 1214 axial hole, α first angle range, β second angle range, δ spacing between lifting parts, θ angular distance between meshing part and adjacent lifting part,

[0052] 130 movable part, 131 force-bearing part, 132 meshing part, 133 pin shaft, 134 arc-shaped rotating part;

[0053] 141 a first torsion spring, 142 a second torsion spring;

[0054] 150 oil filling nozzle: 151 cap, 152 ball, 153 spring, 154 oil filling hole;

[0055] 200 driving device: 210 motor, 220 first transmission device, 230 second transmission device;

[0056] 300 cylinder: 301 piston, 302 sealing chamber, 303 exhaust port;

[0057] 400 nail box, 401 nails;

[0058] 500 air pump;

[0059] 600 handle, 601 power supply, 602 nailing switch

[0060] 700 body, 701 through hole, 702 cover. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all 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.

[0062] The terms "including" and "having" and any variations thereof in the specification and claims of the present invention are intended to cover non-exclusive inclusions. For example, a method or product comprising a series of technical features is not necessarily limited to those technical features clearly listed, but may also include other technical features that are not clearly listed and can be included in the method or product.

[0063] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "clockwise", "counterclockwise" and the like indicate positions, positional relationships and directions based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Among them, "upper" and "lower", "left" and "right", "front" and "back", and "clockwise" and "counterclockwise" are opposite directions.

[0064] In the description of the present invention, it is necessary to understand that the technical features defined by the terms "first", "second" and the like with sequential concepts are only for the purpose of clearly describing the defined technical features so that the defined technical features can be clearly distinguished from other technical features, but do not represent such naming in actual implementation, and therefore cannot be understood as a limitation of the present invention.

[0065] The present invention is described in detail below in conjunction with specific embodiments and accompanying drawings.

[0066] like Figure 1-3As shown, the electric nail gun includes a gun needle lifting mechanism 100 , a motor 210 , a cylinder 300 , a nail magazine 400 , an air pump 500 and a handle 600 .

[0067] The gun needle lifting mechanism 100 is used to lift the gun needle 110 upward and compress the gas spring, and its specific structure is described in detail below.

[0068] The motor 210 is used to drive the lifting wheel 120 to rotate and drive the air pump 500 to inflate the gas spring. Specifically, the motor 210 is configured to rotate in both directions. The output shaft at the front end of the motor drives the lifting wheel 120 to rotate via the first transmission device 220, and the output shaft at the rear end of the motor drives the air pump 500 via the second transmission device 230. The first transmission device and the second transmission device are configured so that when the motor rotates in any direction, one of the lifting wheel and the air pump is driven and the other is disengaged from the drive, that is, when the lifting wheel is driven, the flywheel is not driven, and when the flywheel is driven, the lifting wheel is not driven. The first transmission device and the second transmission device are mechanical transmission structures. Figure 14-15 As shown, the electric motor 210 , the first transmission 220 , and the second transmission 230 form the drive device 200 .

[0069] A piston 301 is disposed in the cylinder 300, and the gun needle 110 is connected to the piston 301 and extends downward. A gas spring is disposed on the upper side of the piston to push the piston downward. When the lifting wheel lifts the gun needle upward, the piston 301 moves upward and compresses the gas spring. When the lifting wheel releases the gun needle, the gas spring applies elastic force to the piston, and the piston moves the gun needle downward to drive the nail.

[0070] The nail magazine 400 is used to store nails 401 and transport the stored nails to the lower end position of the gun needle.

[0071] like Fig.14 As shown, the air pump 500 is used to charge compressed air into the sealed cavity 302 through the air charging pipe 501. In the illustrated structure, the air pump charges compressed air into the sealed cavity to form a gas spring, and the compressed air in the sealed cavity is released through the exhaust port 303 to eliminate the gas spring. In other structures, a sealed cavity may be formed on the upper side of the piston, and a permanent compressed gas is sealed in the sealed cavity to form a gas spring.

[0072] The handle 600 is used for the user to hold the nail gun, and a replaceable or rechargeable power source 601 is disposed at the rear end of the handle. A nailing switch 602 is disposed at the lower side of the handle.

[0073] Among them, the gun needle lifting mechanism 100, the motor 210, the cylinder 300, the air pump 500 and the handle 600 are integrated into the body 700, and the body 700 is embodied as a shell assembled together. The nail magazine 400 is detachably arranged on the body. In particular, the handle 600 extends from the side wall of the cylinder 300 to the rear of the cylinder. The driving device 200 and the nail magazine 400 are located on the left and right sides of the center plane of the handle and the cylinder, so that the mass center of the entire nail gun is as close as possible to the geometric center of the nail gun, so that the user can hold the nail gun freely in any posture without being too heavy.

[0074] like Figure 3-9 As shown, the gun needle lifting mechanism 100 includes a gun needle 110 , a lifting wheel 120 , a movable part 130 , and an elastic element 140 .

[0075] The gun needle 110 has a plurality of teeth 111 distributed along its length.

[0076] The lifting wheel includes a rotating shaft 127 and a wheel body 128 rotating with the rotating shaft. The wheel body 128 is substantially circular. The circumference of the wheel body 128 includes a first angle range α and a second angle range β. A plurality of lifting portions 121 are distributed in the first angle range. When the lifting wheel rotates to the teeth corresponding to the first angle range, the lifting portions engage with the teeth to lift the gun needle, so as to stop the gun needle from being lifted. Figure 4 The second angle range does not distribute the lifting part so that when the lifting wheel rotates to Figure 5 When the second angle range shown corresponds to the teeth, the lifting part is disengaged from the teeth to release the gun needle. The wheel body includes two spaced walls 122, and a gap 123 is formed between the two spaced walls. An arc-shaped through hole 125 is provided on the lifting wheel, and a rod 126 is passed through the arc-shaped through hole. The lifting part 121 is a pin assembled on the lifting wheel. In other embodiments, the lifting part can be a tooth. The two ends of the pin are assembled on the two spaced walls, and the middle part of the lifting part is located in the gap. Moreover, the pin is movably assembled on the lifting wheel, which is achieved by providing a hole 1212 on the lifting wheel, inserting the pin into the hole 1212, and covering the end surface of the lifting wheel with a cover plate 124, and the cover plate 124 constrains the pin in the hole 1212 of the lifting wheel. The edge of the second angular range β of the lifting wheel is concave, that is, the edge of the second angular range of the lifting wheel is located on the inner side of the contour of the circle determined by the edge of the first angular range. In other words, the distance between the edge of the second angular range of the lifting wheel and the center of the lifting wheel is smaller than the distance between the edge of the first angular range of the lifting wheel and the center of the lifting wheel.

[0077] The movable member 130 is movably mounted on the lifting wheel 120 and is configured to change from a first position to a second position as the lifting wheel rotates to adjust the lifting portion to accurately mesh with the teeth. Specifically, the movable member is swingably mounted in the gap between the two spaced walls of the lifting wheel 120 via a pin shaft 133, and the movable member is adjacent to the starting end of the first angle range α, which is the end of the first angle range that first passes through the lifting portion and meshes with the teeth when the lifting wheel rotates to lift the gun needle. The movable member 130 has a force-bearing portion 131 and a meshing portion 132.

[0078] The configuration of the force bearing part and the meshing part is:

[0079] In the direction of rotation of the lifting wheel lifting the gun needle, that is, Figure 4-9 In the counterclockwise direction, the force-bearing portion 131 approaches and leaves the gun needle 110 later than the meshing portion 132 , and the force-bearing portion 131 contacts the gun needle earlier than the meshing portion 132 .

[0080] Moreover, when the movable member 130 is located at the first position, the force-bearing portion 131 is located at the resisting position, and the meshing portion 132 deviates from the meshing position. When the movable member rotates with the lifting wheel, the force-bearing portion is resisted by the teeth and overcomes the elastic force of the elastic element to make the movable member move from the first position to the second position. When the movable member is located at the second position, the force-bearing portion 131 deviates from the resisting position, and the meshing portion 132 is located at the meshing position and is in a sequence of meshing with the teeth together with the lifting portion, that is, the meshing portion and the lifting portion mesh with the teeth one by one. Moreover, the pitch S of the teeth distributed on the gun needle 110 is equal (the distance between any two adjacent teeth is equal), the spacing δ (the angular distance is equal) between any two adjacent lifting portions, when the meshing portion is located at the meshing position and is in a sequence of meshing with the teeth together with the lifting portion, the angular distance θ between the meshing portion and the adjacent lifting portion is equal to the spacing δ between the lifting portions.

[0081] The elastic element acts on the movable member to cause the movable member to return from the second position to the first position. Figure 10-13 In the figure, the elastic element includes a first torsion spring 141 and a second torsion spring 142. The first torsion spring and the second torsion spring are separately located at two ends of the lifting wheel and are positioned on the rotating shaft of the lifting wheel. The first torsion spring and the second torsion spring are symmetrical and one end of them is hooked in the hole on the lifting wheel and the other end is against the end of the rod, so that the elastic element acts on the rod to make the rod apply elastic force to the movable part.

[0082] In other structures, the elastic element can be a tension spring, and the two ends of the tension spring are respectively connected to the lifting wheel and the movable member. The elastic element can also be a compression spring, and the two ends of the compression spring are respectively supported on the lifting wheel and the movable member.

[0083] According to the nail gun of the above structure, when working, the motor 210 is first started to rotate in one direction, and the air pump 500 is driven by the second transmission device 230 to inflate the sealed chamber 302 to form an air spring. After the inflation pressure reaches the set standard, the inflation is stopped. During the inflation period, the motor is disengaged from the drive of the lifting wheel through the first transmission device 220, and the lifting wheel does not rotate. Afterwards, the motor is made to rotate in the other direction, and the lifting wheel 120 is driven by the first transmission device as shown in FIG. Figure 4-9 The lifting wheel 120 lifts the gun needle when it rotates counterclockwise as shown. The lifting wheel lifts and releases the gun needle once for each rotation of the lifting wheel, and nails once. When in use, the nailing switch 602 can be controlled by a finger to make the motor rotate continuously to drive the lifting wheel to achieve continuous nailing, or the nailing switch can be controlled by a finger to make the motor rotate intermittently to drive the lifting wheel to achieve intermittent nailing.

[0084] According to the gun needle lifting mechanism described above, the process of lifting the gun needle for nailing is:

[0085] 1. As Figure 4 As shown, the gun needle 110 is usually kept in a high position, so that once the nailing action is started, the gun needle can be lowered without lifting the gun needle to a high position first, thereby improving the nailing efficiency. In this position, the lifting portion of the lifting wheel in the first angle range α adjacent to the second angle range β is engaged with the lowest tooth on the gun needle 110 to keep the gun needle there.

[0086] 2. In Figure 4 In the state shown, the motor is started to drive the lifting wheel 120 to rotate counterclockwise to Figure 5 When the second angle range β corresponds to the tooth 111, the lifting portion 121 is disengaged from the tooth 111 to release the gun needle, and the piston moves downward quickly with the gun needle under the elastic force of the gas spring. Figure 6 As the lifting wheel continues to rotate, the movable member 130 approaches the gun needle. At this time, the movable member is located at the first position under the elastic force of the elastic element, the force-bearing portion 131 is located at the blocking position, and the meshing portion 132 deviates from the meshing position. The force-bearing portion is located at the blocking position, which means that the force-bearing portion will be blocked by the teeth on the gun needle as the lifting wheel rotates, and the meshing portion deviates from the meshing position, which means that the meshing portion will not mesh with the teeth on the gun needle as the lifting wheel rotates.

[0087] 3. When the lifting wheel continues to rotate until Figure 7 When the force-bearing portion 131 is in the position shown, the force-bearing portion 131 is resisted by the teeth 111 and overcomes the elastic force of the elastic element to cause the movable member 130 to move from Figure 7 The first position shown moves to Figure 8 In the second position shown in FIG. 1 , the movable part makes a clockwise swing and is located at Figure 8In the second position shown, the force-bearing portion 131 deviates from the blocking position to avoid the tooth 111, and the meshing portion 132 is in the meshing position to mesh with the tooth 111 and is in the meshing sequence with the lifting portion 121. In other words, Figure 8 In the embodiment, the meshing portion 132 meshes with the topmost tooth on the gun needle, the lifting portion adjacent to the meshing portion meshes with the second tooth from top to bottom on the gun needle, and the remaining lifting portions mesh with the remaining teeth on the gun needle in a one-to-one correspondence. Figure 8 The state shown continues to rotate, the movable member 130 moves away from the gun needle 110, and the elastic element causes the movable member to return to the first position. Figure 4 In the state shown, lift the gun needle to the high position and turn it to Figure 5 The position shown releases the gun needle for nailing. Figure 4 The status shown has been Figure 5-8 The status shown rotates one circle and then resets to Figure 4 The state shown in the figure means that one nailing cycle is completed. The lifting wheel can be controlled to rotate continuously to continuously nail.

[0088] During the nailing process, when the gun needle 110 cannot reach Figure 4 When the gun needle moves from Figure 5 The status shown only drops to Fig. 9 When the needle is about half the distance shown, the movable part will also move as the lifting wheel rotates. Figure 6-8 The swinging action of the process shown in the figure finally reaches Fig. 9 The meshing portion 132 shown is meshed with the fifth tooth from top to bottom on the gun needle, and the lifting portion adjacent to the meshing portion is meshed with the sixth tooth from top to bottom on the gun needle, and the remaining teeth on the gun needle can be kept in mesh with part of the lifting portion in a one-to-one correspondence. Fig. 9 When the state shown continues to rotate, the gun needle can be lifted to a high position, but the first angle range α has not completely rotated over the gun needle, the second angle range β has not yet rotated to the gun needle, and some of the lifting parts in the first angle range have not yet engaged with the teeth, so the gun needle will not drop. If the lifting wheel continues to rotate, the lifting parts that have not yet engaged with the teeth in the first angle range will engage with the two lowest teeth on the gun needle one by one, causing the gun needle to do a slight lift at a high position until all the teeth are turned away from the gun needle, the first angle range is turned away from the gun needle, and the second angle range is turned to the gun needle, and the gun needle can be lowered to nail. When the gun needle is slightly lifted at a high position, the meshing of the lifting part and the two lowest teeth on the gun needle is precisely matched, and because the gas spring is compressible, this slight lifting of the gun needle at a high position will not cause jamming or damage to the structure.

[0089] During the nailing process, the lifting wheel only rotates, and the height of the lifting wheel does not change. Figure 4-9 In the diagram, the height of the needle is indicated with reference to the lifting wheel.

[0090] As mentioned above, every time the lifting wheel rotates one circle, the lifting part and the movable parts thereon mesh with the teeth on the gun needle once, so the frequency of such meshing is high and lubrication is required. Therefore, a lubrication structure is configured for the gun needle lifting mechanism. The lubrication structure is that a grease nozzle 150 is configured on the lifting wheel, and a grease channel 129 is distributed in the wheel body from the grease nozzle 150 to the lifting part 121.

[0091] Specifically, each pin as the lifting part 121 is located at a port 1211 of a grease channel. The periphery of the wheel body is provided with an axial groove 1210, and the port 1211 of the grease channel is opened in the axial groove 1210 to connect the axial groove, and the pins are located one by one in the corresponding axial grooves 1210. The periphery of the wheel body is located at the bottom of the gap, and the two ends of the pin are assembled on the two spaced walls, and the middle of the pin is located in the gap. Moreover, the pin is constrained in the hole of the lifting wheel by the cover plate so that the pin can move in the hole of the lifting wheel.

[0092] Moreover, a grease channel 129 is also distributed in the wheel body 128 from the grease nozzle 150 to the movable member 130. An arc groove 1213 is provided at the periphery of the wheel body, and the movable member 130 is located in the arc groove 1213 through its arc rotating portion 134, and the port 1211 of the grease channel is connected to the arc groove 1213.

[0093] The grease channels 129 are radially distributed from the center of the wheel body 128. An axial hole 1214 is provided in the rotating shaft 127, and the axial hole 1214 is connected to the grease channel 129. The grease nozzle 150 is arranged at one end of the rotating shaft 127. The grease nozzle 150 includes a cap 151, a ball 152 and a spring 153. The cap 151 has a grease hole 154. The ball 152 is supported by the spring 153 and blocks the grease hole, so that the grease nozzle 150 presents a one-way valve that can only inject grease into the grease channel. Figure 2 As shown, the grease nozzle 150 is hidden in the body 700, and the body 700 is provided with a through hole 701 corresponding to the grease nozzle, and a cover 702 is arranged on the through hole 701. When it is necessary to fill lubricating grease, the cover can be opened, and the external device of the grease gun can be connected to the grease nozzle to fill the grease channel with lubricating grease.

Claims

1. The lubrication structure of the needle lifting mechanism is characterized by include: A lifting wheel (120) for lifting a gun needle comprises a rotating shaft (127) and a wheel body (128) rotating with the rotating shaft, wherein the circumference of the wheel body comprises a first angle range (α) and a second angle range (β), wherein a plurality of lifting parts (121) are distributed in the first angle range so that when the lifting wheel rotates to the teeth corresponding to the gun needle distributed in the first angle range, the lifting parts mesh with the teeth to lift the gun needle, and no lifting parts are distributed in the second angle range so that when the lifting wheel rotates to the teeth corresponding to the gun needle distributed in the second angle range, the lifting parts disengage from the teeth to release the gun needle; The lifting wheel is provided with an oiling nozzle (150), and a grease channel (129) is distributed in the wheel body from the oiling nozzle to the lifting part.

2. The lubrication structure of the needle lifting mechanism according to claim 1 is characterized in that: The lifting portion (121) is a pin assembled on the wheel body, and each pin is located at the end of a grease channel (129).

3. The lubrication structure of the needle lifting mechanism according to claim 2 is characterized in that: An axial groove (1210) is provided on the periphery of the wheel body, a port (1211) of the grease channel is connected to the axial groove (1210), and the pins are located one by one in the corresponding axial grooves.

4. The lubrication structure of the needle lifting mechanism according to claim 3 is characterized by: The wheel body comprises two spaced walls (122), a gap (123) is formed between the two spaced walls, the periphery of the wheel body is located at the bottom of the gap, the two ends of the pin are assembled on the two spaced walls, and the middle of the pin is located in the gap.

5. The lubrication structure of the needle lifting mechanism according to any one of claims 2 to 4, characterized in that: The pin is movably assembled in the hole (1212) of the lifting wheel.

6. The lubrication structure of the needle lifting mechanism according to claim 5, characterized in that: The end surface of the lifting wheel is covered with a cover plate (124), which constrains the pin in the hole (1212) of the lifting wheel.

7. The lubrication structure of the needle lifting mechanism according to claim 1 is characterized by: A movable part (130) is arranged on the lifting wheel, and the movable part is arranged to change position as the lifting wheel rotates to adjust the lifting part to accurately mesh with the teeth distributed on the gun needle; Grease channels from the grease nozzle to the moving parts are distributed in the wheel body.

8. The lubrication structure of the needle lifting mechanism according to claim 7, characterized in that: An arc groove (1213) is provided on the periphery of the wheel body, the movable part is located in the arc groove (1213) via its arc-shaped rotating part (134), and the port (1211) of the grease channel is connected to the arc groove (1213).

9. The lubrication structure of the needle lifting mechanism according to claim 8, characterized in that: The wheel body comprises two spaced walls (122), a gap (123) is formed between the two spaced walls, the periphery of the wheel body is located at the bottom of the gap, the movable part is located in the gap, and the movable part is rotatably assembled on the two spaced walls via a pin shaft.

10. The lubrication structure of the needle lifting mechanism according to any one of claims 1-4, 7-9, characterized in that: Grease 151 channels (129) are distributed radially from the center of the wheel body.

11. The lubrication structure of the needle lifting mechanism according to claim 1, characterized in that: An axial hole (1214) is provided inside the rotating shaft (127), the axial hole (1214) is connected to the grease channel (129), and the grease nozzle (150) is arranged at one end of the rotating shaft (127).

12. The lubrication structure of the needle lifting mechanism according to claim 11, characterized in that: The oil injection nozzle (150) comprises a cap (151), a ball (152) and a spring (153). The cap (151) has an oil injection hole (154). The ball is supported by the spring and blocks the oil injection hole, so that the oil injection nozzle acts as a one-way valve that can only inject grease into the grease channel.

13. Nail gun, characterized by include: A gun needle lifting mechanism (100), comprising a gun needle (110) and a lifting wheel (120) for lifting the gun needle, wherein the gun needle is provided with a plurality of teeth (111) distributed along its length direction, and the gun needle lifting mechanism is provided with a lubrication structure according to any one of claims 1 to 12; A motor (210) for driving the lifting wheel to rotate; A cylinder (300) is provided with a piston (301) in the cylinder, a gun needle (110) is connected to the piston (301) and extends downward, and a gas spring is provided on the upper side of the piston for pushing the piston to move downward; The nail magazine (400) is used to store nails (401) and transport the stored nails to the lower end of the gun needle.

14. The nail gun according to claim 13, characterized in that: The oil injection nozzle is hidden in the machine body (700), and a through hole (701) corresponding to the oil injection nozzle is provided on the machine body (700), and a cover (702) is arranged on the through hole (701).

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