Hand riveter head for automobile riveting robot

Abstract

The invention belongs to the technical field of hand riveter heads, and discloses a hand riveter head for an automobile riveting robot, which comprises an air cylinder main body, an air cylinder cavity is formed in the middle of the air cylinder main body, an air cylinder sleeve rod is movably mounted in the air cylinder cavity, an oil cylinder cavity is formed in the middle of the air cylinder sleeve rod, and a hydraulic rod is movably mounted in the oil cylinder cavity; a rivet pulling device is detachably installed at the lower end of the cylinder sleeve rod, the lower end of the hydraulic rod is in transmission connection with the rivet pulling device, and a sealing oil conveying assembly used for sealing the connecting position of the hydraulic rod and the cylinder sleeve rod and introducing hydraulic oil into an oil cylinder cavity is installed on the cylinder sleeve rod. The air cylinder body is provided with an air cylinder sealing assembly used for driving the connecting position of the air cylinder sleeve rod and the air cylinder body to be sealed. The riveting gun head is simple in overall structure, a pneumatic device and a hydraulic device are integrated, the overall length of the riveting gun head is shortened, and riveting operation is conveniently executed.

Description

Technical Field

[0001] The invention belongs to the technical field of rivet gun heads, and in particular relates to a rivet gun head for an automobile riveting robot. Background Art

[0002] Rivet guns are used for fastening and riveting of various metal plates, pipes and other manufacturing industries. They are currently widely used in the riveting of electromechanical and light industrial products such as automobiles, aviation, railways, refrigeration, elevators, switches, instruments, furniture, decoration, etc. Rivet guns are devices that perform riveting work. During riveting, there is no need to tap the internal threads or weld the nuts. The riveting is firm, efficient, and quick and easy to use.

[0003] The Chinese utility model patent with patent application number: CN202222768835.4 discloses a rivet gun, including a patch locator, a cylinder body, an oil cylinder body and a vacuum nail sucker. The patch locator is connected and fixed to the front end of the cylinder body, the rear end of the cylinder body is connected and fixed to the front end of the oil cylinder body, the rear end of the oil cylinder body is connected and fixed to the vacuum nail sucker, the cylinder body is provided with a rivet clamping assembly, and the oil cylinder body is provided with a breaking assembly composed of a single spring and double oil seal structure. The rivet clamping assembly is slidably connected to the breaking assembly. After the rivet is broken by the linkage of the rivet clamping assembly and the breaking assembly, the vacuum nail sucker completes the nail tail discharge.

[0004] The above-mentioned existing rivet guns of this type can pull the rivets off and perform riveting work, but their overall structure includes a patch locator, a cylinder body, an oil cylinder body and a vacuum nail sucker which are coaxially connected in sequence, and the oil cylinder body is arranged at the rear of the cylinder body, and the oil cylinder body drives the pulling assembly to perform work, and the cylinder body is used to drive the pulling head to move, so that the pulling head drives the three claws to clamp or loosen the rivet tail, which makes the overall structure complicated, and the oil cylinder body is arranged at the rear of the cylinder body, which makes the overall structure too long, affecting the positioning effect of the pulling head during work, and the gun lifting action cannot be realized. An external robotic arm is required to perform the gun lifting action, and the overall integration degree is poor, which makes the overall structure complicated and difficult to produce, thereby reducing the use effect. Summary of the invention

[0005] The main technical problem to be solved by the present invention is to provide a rivet gun head for an automobile riveting robot, which has a simple overall structure, integrates a pneumatic device and a hydraulic device into one, shortens the overall length of the rivet gun head, is easy to use, and can automatically lift the gun to facilitate the riveting operation.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A rivet gun head for an automobile riveting robot comprises a cylinder body, a cylinder cavity is provided in the middle of the cylinder body, a cylinder sleeve rod is movably installed in the cylinder cavity, an oil cylinder cavity is provided in the middle of the cylinder sleeve rod, a hydraulic rod is movably installed in the oil cylinder cavity, a rivet device is detachably installed at the lower end of the cylinder sleeve rod, the lower end of the hydraulic rod is transmission-connected to the rivet device, a sealing oil delivery component for sealing the connection between the hydraulic rod and the cylinder sleeve rod and introducing hydraulic oil into the oil cylinder cavity is installed on the cylinder sleeve rod; a cylinder sealing component for driving the connection between the cylinder sleeve rod and the cylinder body to be sealed is installed on the cylinder body.

[0007] The following is a further optimization of the above technical solution by the present invention: The upper and lower ends of the cylinder cavity respectively penetrate the upper and lower end surfaces of the cylinder body, the inner surface diameter of the cylinder cavity is larger than the outer surface diameter of the cylinder sleeve rod, and the upper and lower ends of the cylinder sleeve rod respectively extend to the outside of the cylinder body; the outer surface of the cylinder sleeve rod is integrally connected with a gas piston body, and the outer surface of the gas piston body is slidably sealed and connected with the inner surface of the cylinder cavity; The upper and lower ends of the oil cylinder cavity respectively penetrate the upper and lower end surfaces of the cylinder sleeve rod, the inner surface diameter of the oil cylinder cavity is larger than the outer surface diameter of the hydraulic rod, and the upper and lower ends of the hydraulic rod respectively extend to the outside of the cylinder sleeve rod; an oil piston body is integrally connected to the outer surface of the hydraulic rod, and the outer surface of the oil piston body is slidably and sealedly connected to the inner surface of the oil cylinder cavity.

[0008] Further optimization: the cylinder sealing assembly includes an upper sealing ring body and a lower sealing ring body, the upper sealing ring body is sleeved on the outer surface of the cylinder sleeve rod and can be detachably installed at the upper port of the cylinder cavity, and the lower sealing ring body is sleeved on the outer surface of the cylinder sleeve rod and can be detachably installed at the lower port of the cylinder cavity; An upper air inlet and outlet is provided on the outer surface of the cylinder body near the upper sealing ring body, and the upper air inlet and outlet are connected to the cylinder cavity; a lower air inlet and outlet is provided on the outer surface of the cylinder body near the lower sealing ring body, and the lower air inlet and outlet are connected to the cylinder cavity.

[0009] Further optimization: the sealed oil delivery assembly includes an upper oil delivery plug and a lower oil delivery plug. The upper oil delivery plug is sleeved on the hydraulic rod and can be removably installed at the upper port of the cylinder cavity; the lower oil delivery plug is sleeved on the hydraulic rod and can be removably installed at the lower port of the cylinder cavity. The inner surfaces of the upper oil delivery plug and the lower oil delivery plug are slidingly sealed with the outer surface of the hydraulic rod.

[0010] Further optimization: the overall structure of the upper oil plug includes an upper hexagonal nut block, an upper threaded section and an upper sealing section which are integrally connected from top to bottom, and an upper annular groove is provided at the connection between the upper threaded section and the upper sealing section; the upper oil plug is detachably installed at the upper port of the cylinder cavity through the threads on the upper threaded section; the outer surface diameter of the upper sealing section is smaller than the inner surface diameter of the cylinder cavity and an upper oil cavity is provided between the two; the inner surface of the upper sealing section is slidingly sealed with the outer surface of the hydraulic rod.

[0011] Further optimization: an upper oil inlet and outlet hole is provided on the outer surface of the upper hexagonal nut block, the upper oil inlet and outlet hole is a blind hole, an upper connecting hole is provided inside the upper threaded section, the upper end of the upper connecting hole is connected with the upper oil inlet and outlet hole, the lower end of the upper connecting hole passes through the lower end surface of the upper sealing section, and the middle part of the upper connecting hole is connected with the upper annular groove.

[0012] Further optimization: a limit sleeve is detachably installed at a position below the upper oil delivery plug in the oil cylinder cavity, the limit sleeve is sleeved on the hydraulic rod, and the inner surface of the limit sleeve and the outer surface of the hydraulic rod are arranged at intervals, and an oil passage is provided between the two; An annular protrusion is integrally connected to the inner surface of the oil cylinder cavity at the downward limit position of the oil piston body. The annular protrusion is sleeved on the hydraulic rod, and the inner surface of the annular protrusion and the outer surface of the hydraulic rod are arranged at intervals to form an oil delivery channel.

[0013] Further optimization: the overall structure of the lower oil delivery plug includes a lower connecting section, a lower hexagonal nut block, a lower threaded section and a lower sealing section which are integrally connected from bottom to top; a lower annular groove is provided at the connection between the lower threaded section and the lower sealing section; the lower oil delivery plug is detachably installed at the lower port of the cylinder cavity through the threads on the lower threaded section; the outer surface diameter of the lower sealing section is smaller than the inner surface diameter of the cylinder cavity and a lower oil passage cavity is provided between the two; the inner surface of the lower sealing section is slidingly and sealingly connected to the outer surface of the hydraulic rod.

[0014] Further optimization: a lower oil inlet and outlet hole is provided on the outer surface of the lower hexagonal nut block, the lower oil inlet and outlet hole is a blind hole, a lower connecting hole is provided inside the lower threaded section, the lower end of the lower connecting hole is connected with the lower oil inlet and outlet holes, the upper end of the lower connecting hole passes through the upper end surface of the lower sealing section, and the middle part of the lower connecting hole is connected with the lower annular groove.

[0015] Further optimization: the riveting device includes a pull head cylinder, the upper end of which is fixedly mounted on the lower connecting section of the lower oil delivery plug by threaded connection, a conical cylinder is slidably mounted inside the pull head cylinder, and a movable cylinder is threadedly connected to the upper end of the conical cylinder; the upper end of the movable cylinder is fixedly connected to the lower end of the hydraulic rod; a conical hole is opened in the middle of the conical cylinder, and two symmetrically arranged inclined surface two clamping jaws are slidably mounted in the conical hole, and a top joint is arranged above the inclined surface two clamping jaws in the conical cylinder; A central hole is provided in the middle of the top joint, and a nail suction tube is fixedly installed in the central hole; a nail suction hole is coaxially provided in the middle of the hydraulic rod, and the upper end of the nail suction tube extends a distance into the nail suction hole.

[0016] The present invention adopts the above technical solution and has the following beneficial effects: 1. In the present invention, the rivet gun head can be installed on the working end of the automobile riveting robot. The automobile riveting robot is used to drive the rivet gun head to move in multiple directions to adjust the position of the rivet gun head. When high-pressure gas is introduced into the upper air inlet and outlet or the lower air inlet and outlet on the cylinder body, the high-pressure gas enters the cylinder cavity to drive the cylinder sleeve rod to move upward or downward. At this time, the cylinder sleeve rod drives the rivet device to move, thereby adjusting the position of the rivet device or lifting the gun.

[0017] 2. When high-pressure hydraulic oil is introduced into the upper oil inlet and outlet holes on the upper oil delivery plug or the lower oil inlet and outlet holes on the lower oil delivery plug in the present invention, the high-pressure hydraulic oil enters the oil cylinder cavity to drive the hydraulic rod to move upward or downward. The upward movement of the hydraulic rod drives the riveting device to perform the riveting operation; the downward movement of the hydraulic rod drives the riveting device to perform the resetting operation, which is convenient for use.

[0018] 3. The present invention adopts the above technical solution, which has an ingenious conception, a reasonable structure, and a simple overall structure. The pneumatic device and the hydraulic device are integrated into one, shortening the overall length of the rivet gun head, making it easy to use. The pneumatic device is used to drive the rivet device to move, so as to adjust the position of the rivet device. The hydraulic device is used to drive the rivet device to work, so that the rivet device performs riveting operations or resetting operations, which is convenient for performing riveting operations.

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 A cross-sectional view of the overall structure of an embodiment of the present invention; Figure 3 A cross-sectional view of the cylinder body and the cylinder sleeve rod in the embodiment of the present invention when they are matched; Figure 4 A cross-sectional view of the cylinder sleeve rod and the hydraulic rod when they are matched in the embodiment of the present invention; Figure 5 It is a structural schematic diagram of an upper oil delivery plug in an embodiment of the present invention; Figure 6 This is a schematic structural diagram of a lower oil delivery plug in an embodiment of the present invention; Figure 7 Schematic diagram of the structure of a riveting device in an embodiment of the present invention.

[0021] In the figure: 1-cylinder body; 101-cylinder cavity; 102-upper sealing ring body; 103-lower sealing ring body; 104-second sealing groove; 105-upper air inlet and outlet; 106-lower air inlet and outlet; 2-cylinder sleeve rod; 201-oil cylinder cavity; 202-gas piston body; 203-first sealing groove; 204-annular protrusion; 3-hydraulic rod; 301-oil piston body; 302-nail suction hole; 4-riveting device; 401-pulling head cylinder; 402-movable cylinder; 403-conical cylinder; 404-inclined two clamping jaws; 405-top joint; 406-nail suction tube; 407 - boss; 5-upper oil plug; 501-upper hexagonal nut block; 502-upper threaded section; 503-upper sealing section; 504-upper annular groove; 505-upper oil inlet and outlet holes; 506-upper connecting hole; 507-upper sealing groove; 508-upper center hole; 6-lower oil plug; 601-lower connecting section; 602-lower hexagonal nut block; 603-lower threaded section; 604-lower sealing section; 605-lower center hole; 606-lower oil inlet and outlet holes; 607-lower annular groove; 608-lower connecting hole; 609-lower sealing groove; 7-limiting sleeve; 701-oil passage. DETAILED DESCRIPTION

[0022] like Figure 1-4 As shown: a rivet gun head for an automobile riveting robot, comprising a cylinder body 1, a cylinder cavity 101 is opened in the middle of the cylinder body 1, a cylinder sleeve rod 2 is movably installed in the cylinder cavity 101, an oil cylinder cavity 201 is opened in the middle of the cylinder sleeve rod 2, a hydraulic rod 3 is movably installed in the oil cylinder cavity 201, a rivet device 4 is detachably installed at the lower end of the cylinder sleeve rod 2, the lower end of the hydraulic rod 3 is transmission-connected to the rivet device 4, a sealing oil delivery component for sealing the connection between the hydraulic rod 3 and the cylinder sleeve rod 2 and introducing hydraulic oil into the oil cylinder cavity 201 is installed on the cylinder sleeve rod 2; a cylinder sealing component for driving the connection between the cylinder sleeve rod 2 and the cylinder body 1 to be sealed is installed on the cylinder body 1.

[0023] The upper and lower ends of the cylinder cavity 101 respectively penetrate the upper and lower end surfaces of the cylinder body 1. The inner surface diameter of the cylinder cavity 101 is larger than the outer surface diameter of the cylinder sleeve rod 2. After the cylinder sleeve rod 2 is coaxially installed in the cylinder cavity 101, the upper and lower ends of the cylinder sleeve rod 2 respectively extend to the outside of the cylinder body 1.

[0024] The outer surface of the cylinder sleeve rod 2 is integrally connected with a gas piston body 202 located in the cylinder cavity 101. The outer surface diameter of the gas piston body 202 matches the inner surface diameter of the cylinder cavity 101. The outer surface of the gas piston body 202 is slidably and sealingly connected to the inner surface of the cylinder cavity 101.

[0025] In this embodiment, a plurality of first sealing grooves 203 are provided on the outer surface of the gas piston body 202, and the plurality of first sealing grooves 203 are arranged at intervals along the height direction of the gas piston body 202. A first sealing ring is installed in each first sealing groove 203, and the first sealing ring is slidably sealed and connected to the inner surface of the cylinder cavity 101.

[0026] In this design, the outer surface of the gas piston body 202 is connected to the inner surface of the cylinder cavity 101 in a sliding and sealing manner through the cooperation of the first sealing groove 203 and the first sealing ring.

[0027] The cylinder sealing assembly includes an upper sealing ring body 102 and a lower sealing ring body 103. The upper sealing ring body 102 is sleeved on the outer surface of the cylinder sleeve rod 2 and can be detachably installed at the upper port of the cylinder cavity 101. The lower sealing ring body 103 is sleeved on the outer surface of the cylinder sleeve rod 2 and can be detachably installed at the lower port of the cylinder cavity 101.

[0028] In this embodiment, the inner surface of the upper port of the cylinder cavity 101 is provided with an internal thread, and the outer surface of the upper sealing ring body 102 is provided with an external thread. The upper sealing ring body 102 is detachably installed at the upper port of the cylinder cavity 101 by means of a threaded connection.

[0029] An inner surface of the lower end of the cylinder cavity 101 is provided with an internal thread, and an outer surface of the lower sealing ring body 103 is provided with an external thread. The lower sealing ring body 103 is detachably mounted at the lower end of the cylinder cavity 101 by means of a threaded connection.

[0030] In this embodiment, a second sealing groove 104 is respectively opened on the outer surface of the upper sealing ring body 102 and the lower sealing ring body 103, and a second sealing ring is installed in the second sealing groove 104. After the upper sealing ring body 102 and the lower sealing ring body 103 are detachably installed at the upper and lower ports of the cylinder cavity 101, the second sealing ring is used to improve the sealing effect.

[0031] The inner surfaces of the upper sealing ring body 102 and the lower sealing ring body 103 are sealingly connected to the outer surface of the cylinder sleeve rod 2 through a sliding sealing assembly.

[0032] In this embodiment, the sliding seal assembly is a prior art, and the sliding seal assembly is used to slide and seal the connection between the inner surface of the upper sealing ring body 102 and the lower sealing ring body 103 and the outer surface of the cylinder sleeve rod 2 to prevent leakage of high-pressure gas entering the cylinder cavity 101.

[0033] An upper air inlet and outlet 105 is provided on the outer surface of the cylinder body 1 near the upper sealing ring body 102 . The upper air inlet and outlet 105 is in the shape of a stepped hole. The inner end of the upper air inlet and outlet 105 is connected to the cylinder cavity 101 , and the outer end of the upper air inlet and outlet 105 passes through the outer surface of the cylinder body 1 .

[0034] A lower air inlet and outlet 106 is provided on the outer surface of the cylinder body 1 near the lower sealing ring body 103 . The lower air inlet and outlet 106 is in the shape of a stepped hole. The inner end of the lower air inlet and outlet 106 is connected to the cylinder cavity 101 , and the outer end of the lower air inlet and outlet 106 passes through the outer surface of the cylinder body 1 .

[0035] The upper air inlet and outlet 105 and the lower air inlet and outlet 106 are connected to an external high-pressure air source through an air supply switching pipeline.

[0036] In this embodiment, the gas supply switching pipeline is a prior art, and the gas supply switching pipeline is used to guide the high-pressure gas output by the external high-pressure gas source so that the high-pressure gas is delivered to the upper inlet and outlet 105 or the lower inlet and outlet 106.

[0037] In the present embodiment, when the high-pressure gas output by the external high-pressure gas source enters the upper air inlet and outlet 105, the lower air inlet and outlet 106 performs exhaust operation; at this time, the high-pressure gas in the upper air inlet and outlet 105 enters the cylinder chamber 101 and is located above the gas piston body 202. At this time, the high-pressure gas acts on the upper part of the gas piston body 202 and pushes the gas piston body 202 to drive the cylinder sleeve rod 2 to move downward. The gas in the cylinder chamber 101 and below the gas piston body 202 is discharged through the lower air inlet and outlet 106, so that the gas piston body 202 and the cylinder sleeve rod 2 can move smoothly. The downward movement of the cylinder sleeve rod 2 drives the riveting device 4 to move, thereby adjusting the position of the riveting device 4.

[0038] In this embodiment, when the lower surface of the gas piston body 202 contacts the lower sealing ring body 103, it indicates that the cylinder sleeve rod 2 has moved downward to the lower limit position.

[0039] In this embodiment, when the high-pressure gas output by the external high-pressure gas source enters the lower air inlet and outlet 106, the upper air inlet and outlet 105 performs exhaust operation; at this time, the high-pressure gas in the lower air inlet and outlet 106 enters the cylinder chamber 101 and is located below the gas piston body 202. At this time, the high-pressure gas acts on the bottom of the gas piston body 202 and pushes the gas piston body 202 to drive the cylinder sleeve rod 2 to move upward. The gas in the cylinder chamber 101 and above the gas piston body 202 is discharged through the upper air inlet and outlet 105, so that the gas piston body 202 and the cylinder sleeve rod 2 can move smoothly. The cylinder sleeve rod 2 moves upward and drives the riveting device 4 to move, thereby adjusting the position of the riveting device 4.

[0040] In this embodiment, when the upper surface of the gas piston body 202 contacts the upper sealing ring body 102, it indicates that the cylinder sleeve rod 2 has moved upward to the upper limit position.

[0041] In addition to this embodiment, the cylinder sleeve rod 2 is provided with spring rings on the upper and lower sides of the gas piston body 202, respectively, and the spring rings are used to buffer the contact force when the gas piston body 202 is in contact with the upper sealing ring body 102 and the lower sealing ring body 103, so as to facilitate use.

[0042] The upper and lower ends of the cylinder cavity 201 respectively penetrate the upper and lower end surfaces of the cylinder sleeve rod 2. The inner surface diameter of the cylinder cavity 201 is larger than the outer surface diameter of the hydraulic rod 3. After the hydraulic rod 3 is coaxially installed in the cylinder cavity 201, the upper and lower ends of the hydraulic rod 3 respectively extend to the outside of the cylinder sleeve rod 2.

[0043] An oil piston body 301 is integrally connected to the outer surface of the hydraulic rod 3 , and the outer surface of the oil piston body 301 is slidably and sealingly connected to the inner surface of the oil cylinder chamber 201 .

[0044] An annular protrusion 204 is integrally connected to the inner surface of the oil cylinder cavity 201 at the downward limit position of the oil piston body 301. The annular protrusion 204 is sleeved on the hydraulic rod 3, and the inner surface of the annular protrusion 204 and the outer surface of the hydraulic rod 3 are arranged at intervals to form an oil delivery channel.

[0045] When the oil piston body 301 moves downward to the downward limit position, the lower end surface of the oil piston body 301 abuts against the annular protrusion 204, which is used to limit the downward movement of the oil piston body 301 and is convenient to use.

[0046] The sealed oil delivery assembly includes an upper oil delivery plug 5 and a lower oil delivery plug 6. The upper oil delivery plug 5 is sleeved on the hydraulic rod 3 and can be detachably installed at the upper port of the cylinder chamber 201; the lower oil delivery plug 6 is sleeved on the hydraulic rod 3 and can be detachably installed at the lower port of the cylinder chamber 201. The inner surfaces of the upper oil delivery plug 5 and the lower oil delivery plug 6 are slidably and sealedly connected to the outer surface of the hydraulic rod 3.

[0047] An upper center hole 508 is opened in the middle of the upper oil delivery plug 5 , and the upper and lower ends of the upper center hole 508 respectively penetrate the upper and lower end surfaces of the upper oil delivery plug 5 , and the upper oil delivery plug 5 is sleeved on the hydraulic rod 3 through the upper center hole 508 .

[0048] The overall structure of the upper oil plug 5 includes an upper hexagonal nut block 501, an upper threaded section 502 and an upper sealing section 503 which are integrally connected in sequence from top to bottom. The outer surface diameter of the upper sealing section 503 is smaller than the inner surface diameter of the cylinder cavity 201; an upper annular groove 504 is provided at the connection between the upper threaded section 502 and the upper sealing section 503.

[0049] An internal thread is provided on the inner surface of the oil cylinder cavity 201 near its upper port, and an external thread is provided on the outer surface of the upper threaded section 502 ; the upper oil delivery plug 5 is detachably mounted on the upper port of the oil cylinder cavity 201 through the threads on the upper threaded section 502 .

[0050] In this embodiment, the thread between the upper thread section 502 and the inner surface of the oil cylinder cavity 201 is a sealing thread to prevent the oil in the oil cylinder cavity 201 from leaking at this connection.

[0051] An upper oil inlet and outlet hole 505 is provided on the outer surface of the upper hexagonal nut block 501, and the upper oil inlet and outlet hole 505 is a blind hole. An upper connecting hole 506 is provided inside the upper threaded section 502, and the upper connecting hole 506 is vertically arranged. The upper end of the upper connecting hole 506 is connected with the upper oil inlet and outlet hole 505, and the lower end of the upper connecting hole 506 passes through the lower end surface of the upper sealing section 503, and the middle part of the upper connecting hole 506 is connected with the upper annular groove 504.

[0052] After the upper oil delivery plug 5 is detachably installed at the upper port of the cylinder cavity 201 through the threads on the upper threaded section 502, an upper oil cavity is provided between the outer surface of the upper sealing section 503 and the inner surface of the cylinder cavity 201; the upper oil inlet and outlet holes 505 are connected to the cylinder cavity 201 through the upper connecting hole 506, the upper annular groove 504 and the upper oil cavity.

[0053] A plurality of upper sealing grooves 507 are provided on the inner surface of the upper center hole 508 at the position of the upper sealing section 503 . The plurality of upper sealing grooves 507 are arranged at intervals. An upper sealing ring is installed in the upper sealing groove 507 . The upper sealing ring is slidably sealed and connected to the outer surface of the hydraulic rod 3 .

[0054] With this design, the upper oil delivery plug 5 is connected to the outer surface of the hydraulic rod 3 in a sliding seal through the upper sealing ring installed in the upper sealing groove 507, which is convenient for assembly and installation and avoids leakage of the hydraulic oil in the cylinder chamber 201 at this connection.

[0055] A limit sleeve 7 is detachably installed in the cylinder cavity 201 below the upper oil plug 5. The limit sleeve 7 is sleeved on the hydraulic rod 3, and the inner surface of the limit sleeve 7 and the outer surface of the hydraulic rod 3 are spaced apart, with an oil passage 701 provided therebetween.

[0056] In this embodiment, the limiting sleeve 7 is detachably installed in the oil cylinder cavity 201 by means of threaded connection and is located below the upper oil delivery plug 5 .

[0057] The limiting sleeve 7 is used to limit the upward limit position of the oil piston body 301. When the hydraulic rod 3 and the oil piston body 301 move upward and the upper surface of the oil piston body 301 contacts the limiting sleeve 7, the surface of the oil piston body 301 has moved upward to the upward limit position.

[0058] A lower center hole 605 is opened in the middle of the lower oil delivery plug 6 , and the upper and lower ends of the lower center hole 605 respectively penetrate the upper and lower end surfaces of the lower oil delivery plug 6 , and the lower oil delivery plug 6 is sleeved on the hydraulic rod 3 through the lower center hole 605 .

[0059] The overall structure of the lower oil delivery plug 6 includes a lower connecting section 601, a lower hexagonal nut block 602, a lower threaded section 603 and a lower sealing section 604 which are integrally connected in sequence from bottom to top. The outer surface diameter of the lower sealing section 604 is smaller than the inner surface diameter of the cylinder cavity 201; a lower annular groove 607 is provided at the connection between the lower threaded section 603 and the lower sealing section 604.

[0060] An internal thread is provided on the inner surface of the oil cylinder chamber 201 near its lower port, and an external thread is provided on the outer surface of the lower thread section 603 ; the lower oil delivery plug 6 is detachably mounted on the lower port of the oil cylinder chamber 201 through the thread on the lower thread section 603 .

[0061] In this embodiment, the thread between the lower thread section 603 and the inner surface of the cylinder cavity 201 is a sealing thread to prevent the oil in the cylinder cavity 201 from leaking at this connection.

[0062] A lower oil inlet and outlet hole 606 is provided on the outer surface of the lower hexagonal nut block 602, and the lower oil inlet and outlet hole 606 is a blind hole. A lower connecting hole 608 is provided inside the lower threaded section 603, and the lower connecting hole 608 is vertically arranged. The lower end of the lower connecting hole 608 is connected with the lower oil inlet and outlet hole 606, and the upper end of the lower connecting hole 608 passes through the upper end surface of the lower sealing section 604, and the middle part of the lower connecting hole 608 is connected with the lower annular groove 607.

[0063] After the lower oil delivery plug 6 is detachably installed at the lower port of the cylinder chamber 201 through the threads on the lower threaded section 603, a lower oil passage chamber is provided between the outer surface of the lower sealing section 604 and the inner surface of the cylinder chamber 201; the lower oil inlet and outlet hole 606 is connected to the cylinder chamber 201 through the lower connecting hole 608, the lower annular groove 607 and the lower oil passage chamber.

[0064] A plurality of lower sealing grooves 609 are provided on the inner surface of the lower center hole 605 at the position of the lower sealing section 604 . The plurality of lower sealing grooves 609 are arranged at intervals. Lower sealing rings are installed in the lower sealing grooves 609 . The lower sealing rings are slidably sealed and connected to the outer surface of the hydraulic rod 3 .

[0065] With this design, the lower oil delivery plug 6 is connected to the outer surface of the hydraulic rod 3 in a sliding seal through the lower sealing ring installed in the lower sealing groove 609, which is convenient for assembly and installation and avoids leakage of the hydraulic oil in the cylinder chamber 201 at this connection.

[0066] In this embodiment, the oil supply switching pipelines of the upper oil inlet and outlet holes 505 and the lower oil inlet and outlet holes 606 are connected to an external hydraulic oil source.

[0067] In this embodiment, the oil supply switching pipeline is a prior art, and the oil supply switching pipeline is used to guide the high-pressure hydraulic oil output by the external hydraulic oil source so that the high-pressure hydraulic oil is delivered to the upper inlet and outlet oil holes 505 or the lower inlet and outlet oil holes 606.

[0068] When the high-pressure hydraulic oil output by the external hydraulic oil source enters the upper oil inlet and outlet holes 505, the lower oil inlet and outlet holes 606 perform oil discharge operations; at this time, the high-pressure hydraulic oil in the upper oil inlet and outlet holes 505 enters the oil cylinder chamber 201 above the oil piston body 301 through the upper connecting hole 506, the upper annular groove 504 and the upper oil chamber. At this time, the high-pressure hydraulic oil acts on the top of the oil piston body 301 and pushes the oil piston body 301 to drive the hydraulic rod 3 to move downward. The hydraulic oil in the oil cylinder chamber 201 below the oil piston body 301 is discharged through the lower oil inlet and outlet holes 606, so that the oil piston body 301 and the hydraulic rod 3 can move downward smoothly.

[0069] When the high-pressure hydraulic oil output by the external hydraulic oil source enters the lower oil inlet and outlet holes 606, the upper oil inlet and outlet holes 505 perform oil discharge operations; at this time, the high-pressure hydraulic oil in the lower oil inlet and outlet holes 606 enters the oil cylinder chamber 201 below the oil piston body 301 through the lower connecting hole 608, the lower annular groove 607 and the lower oil chamber. At this time, the high-pressure hydraulic oil acts on the bottom of the oil piston body 301 and pushes the oil piston body 301 to drive the hydraulic rod 3 to move upward. The hydraulic oil in the oil cylinder chamber 201 located above the oil piston body 301 is discharged through the upper oil inlet and outlet holes 505, so that the oil piston body 301 and the hydraulic rod 3 can move upward smoothly.

[0070] In this embodiment, the riveting device 4 includes a pulling head cylinder 401, the upper end of which is fixedly mounted on the lower connecting section 601 of the lower oil delivery plug 6 by means of a threaded connection, and a conical cylinder 403 is slidably mounted inside the pulling head cylinder 401, and a movable cylinder 402 is threadedly connected to the upper end of the conical cylinder 403.

[0071] The lower end of the hydraulic rod 3 extends into the pulling head cylinder 401 and is fixedly connected to the movable cylinder 402 by means of a threaded connection. A conical hole is provided in the middle of the conical cylinder 403. Two symmetrically arranged inclined jaws 404 are slidably installed inside the conical hole. A top joint 405 is provided above the inclined jaws 404 in the conical cylinder 403. The lower end of the top joint 405 and the upper end surface of the inclined jaws 404 are respectively provided with matching inclined surfaces.

[0072] A central hole is formed in the middle of the top joint 405, and a nail suction tube 406 is fixedly installed in the central hole.

[0073] A nail suction hole 302 is coaxially opened in the middle of the hydraulic rod 3 , and the upper and lower ends of the nail suction hole 302 respectively penetrate the upper and lower end surfaces of the hydraulic rod 3 , and the upper end of the nail suction tube 406 extends into the nail suction hole 302 for a distance.

[0074] In this embodiment, a top spring (not shown in the figure) is installed between the lower end of the hydraulic rod 3 and the top joint 405. The top spring is sleeved on the nail suction tube 406. The top spring outputs elastic force to push the top joint 405 downward. The top joint 405 moves downward and the two inclined jaws 404 are separated by the cooperation of the inclined surface to open the clamping channel.

[0075] A nail hole is provided on the lower end surface of the pull head cylinder 401, and a boss 407 is integrally connected to the inner end surface of the pull head cylinder 401 near the nail hole. The upper end surface of the boss 407 and the lower end surface of the two inclined clamping jaws 404 are respectively provided with matching inclined surfaces.

[0076] In this embodiment, the upper end of the nail suction hole 302 is connected to an external vacuum nail suction device through a connecting pipe. When the vacuum nail suction device works, negative pressure suction is generated in the nail suction hole 302 and the nail suction tube 406, and the negative pressure suction is used to suck away the nail tail of the rivet.

[0077] In the initial state, the top joint 405 moves downward under the thrust of the top spring, and the lower end surface of the inclined second clamping jaw 404 is in contact with the boss 407. At this time, the top joint 405 moves downward, and the two clamping jaws in the inclined second clamping jaw 404 are opened through the cooperation of the matching inclined surface and the cooperation of the matching inclined surface between the inclined second clamping jaw 404 and the boss 407; then the nail tail of the rivet is inserted into the middle part of the inclined second clamping jaw 404 through the nail hole on the lower end surface of the pull head cylinder 401. When the hydraulic rod 3 moves upward, the hydraulic rod 3 The movable cylinder 402 and the conical cylinder 403 are driven to move upward synchronously. At this time, when the conical cylinder 403 moves upward, the inner surface of the conical hole squeezes the two inclined jaws 404, so that the two inclined jaws 404 are retracted to clamp the nail tail of the rivet. The hydraulic rod 3 drives the conical cylinder 403 to continue moving, driving the two inclined jaws 404 to further press the nail tail of the rivet and pull the nail tail upward. The nail tail is sucked into and discharged from the rivet gun body through the nail suction tube 406 of the external vacuum nail suction device to complete the riveting process and enter the next working cycle.

[0078] In this embodiment, the rivet gun head can be installed on the working end of the automobile riveting robot. The automobile riveting robot is used to drive the rivet gun head to move in multiple directions to adjust the position of the rivet gun head. When high-pressure gas is introduced into the upper air inlet and outlet 105 or the lower air inlet and outlet 106 on the cylinder body 1, the high-pressure gas enters the cylinder cavity 101 and drives the cylinder sleeve rod 2 to move upward or downward. At this time, the cylinder sleeve rod 2 drives the rivet device 4 to move, thereby adjusting the position of the rivet device 4 or lifting the gun.

[0079] When high-pressure hydraulic oil is introduced into the upper oil inlet and outlet holes 505 on the upper oil supply plug 5 or the lower oil inlet and outlet holes 606 on the lower oil supply plug 6, the high-pressure hydraulic oil enters the oil cylinder cavity 201 to drive the hydraulic rod 3 to move upward or downward. The upward movement of the hydraulic rod 3 drives the riveting device 4 to perform the riveting operation; the downward movement of the hydraulic rod 3 drives the riveting device 4 to perform the resetting operation, which is convenient for use.

[0080] For those skilled in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the protection scope of the present invention.

Claims

1. A rivet gun head for an automobile riveting robot, comprising a cylinder body (1), characterized in that: A cylinder cavity (101) is provided in the middle of the cylinder body (1), a cylinder sleeve rod (2) is movably mounted in the cylinder cavity (101), an oil cylinder cavity (201) is provided in the middle of the cylinder sleeve rod (2), a hydraulic rod (3) is movably mounted in the oil cylinder cavity (201), a riveting device (4) is detachably mounted at the lower end of the cylinder sleeve rod (2), the lower end of the hydraulic rod (3) is drivingly connected to the riveting device (4), a sealing oil delivery component for sealing the connection between the hydraulic rod (3) and the cylinder sleeve rod (2) and for passing hydraulic oil into the oil cylinder cavity (201) is installed on the cylinder sleeve rod (2); and a cylinder sealing component for driving the connection between the cylinder sleeve rod (2) and the cylinder body (1) is installed on the cylinder body (1).

2. The rivet gun head for an automobile riveting robot according to claim 1, characterized in that: The upper and lower ends of the cylinder cavity (101) respectively penetrate the upper and lower end surfaces of the cylinder body (1); the inner surface diameter of the cylinder cavity (101) is larger than the outer surface diameter of the cylinder sleeve rod (2); the upper and lower ends of the cylinder sleeve rod (2) respectively extend to the outside of the cylinder body (1); the outer surface of the cylinder sleeve rod (2) is integrally connected with a gas piston body (202); the outer surface of the gas piston body (202) is slidably sealed with the inner surface of the cylinder cavity (101); The upper and lower ends of the oil cylinder cavity (201) respectively penetrate the upper and lower end surfaces of the cylinder sleeve rod (2); the inner surface diameter of the oil cylinder cavity (201) is larger than the outer surface diameter of the hydraulic rod (3); the upper and lower ends of the hydraulic rod (3) respectively extend to the outside of the cylinder sleeve rod (2); an oil piston body (301) is integrally connected to the outer surface of the hydraulic rod (3); the outer surface of the oil piston body (301) is slidably sealed and connected to the inner surface of the oil cylinder cavity (201).

3. The rivet gun head for an automobile riveting robot according to claim 2, characterized in that: The cylinder sealing assembly comprises an upper sealing ring body (102) and a lower sealing ring body (103); the upper sealing ring body (102) is sleeved on the outer surface of the cylinder sleeve rod (2) and is detachably mounted at the upper end of the cylinder chamber (101); and the lower sealing ring body (103) is sleeved on the outer surface of the cylinder sleeve rod (2) and is detachably mounted at the lower end of the cylinder chamber (101); An upper air inlet and outlet (105) is provided on the outer surface of the cylinder body (1) at a position close to the upper sealing ring body (102), and the upper air inlet and outlet (105) is connected to the cylinder cavity (101); a lower air inlet and outlet (106) is provided on the outer surface of the cylinder body (1) at a position close to the lower sealing ring body (103), and the lower air inlet and outlet (106) is connected to the cylinder cavity (101).

4. The rivet gun head for an automobile riveting robot according to claim 3, characterized in that: The sealed oil delivery assembly comprises an upper oil delivery plug (5) and a lower oil delivery plug (6); the upper oil delivery plug (5) is sleeved on the hydraulic rod (3) and is detachably mounted at the upper port of the oil cylinder chamber (201); the lower oil delivery plug (6) is sleeved on the hydraulic rod (3) and is detachably mounted at the lower port of the oil cylinder chamber (201); the inner surfaces of the upper oil delivery plug (5) and the lower oil delivery plug (6) are slidably sealedly connected to the outer surface of the hydraulic rod (3).

5. The rivet gun head for an automobile riveting robot according to claim 4, characterized in that: The overall structure of the upper oil delivery plug (5) comprises an upper hexagonal nut block (501), an upper threaded section (502) and an upper sealing section (503) which are integrally connected in sequence from top to bottom, and an upper annular groove (504) is provided at the connection between the upper threaded section (502) and the upper sealing section (503); the upper oil delivery plug (5) is detachably mounted at the upper port of the oil cylinder cavity (201) via the threads on the upper threaded section (502); the outer surface diameter of the upper sealing section (503) is smaller than the inner surface diameter of the oil cylinder cavity (201), and an upper oil cavity is provided between the two; and the inner surface of the upper sealing section (503) is slidably sealedly connected to the outer surface of the hydraulic rod (3).

6. The rivet gun head for an automobile riveting robot according to claim 5, characterized in that: An upper oil inlet and outlet hole (505) is provided on the outer surface of the upper hexagonal nut block (501), and the upper oil inlet and outlet hole (505) is a blind hole. An upper connecting hole (506) is provided inside the upper threaded section (502), and the upper end of the upper connecting hole (506) is communicated with the upper oil inlet and outlet hole (505), and the lower end of the upper connecting hole (506) passes through the lower end surface of the upper sealing section (503), and the middle part of the upper connecting hole (506) is communicated with the upper annular groove (504).

7. The rivet gun head for an automobile riveting robot according to claim 6, characterized in that: A limit sleeve (7) is detachably mounted in the oil cylinder cavity (201) at a position below the upper oil delivery plug (5); the limit sleeve (7) is sleeved on the hydraulic rod (3), and the inner surface of the limit sleeve (7) and the outer surface of the hydraulic rod (3) are arranged at a distance, and an oil passage (701) is provided between the two. An annular protrusion (204) is integrally connected to the inner surface of the oil cylinder cavity (201) at the downward limit position of the oil piston body (301); the annular protrusion (204) is sleeved on the hydraulic rod (3); and the inner surface of the annular protrusion (204) and the outer surface of the hydraulic rod (3) are arranged at intervals to form an oil delivery channel.

8. The rivet gun head for an automobile riveting robot according to claim 7, characterized in that: The overall structure of the lower oil delivery plug (6) comprises a lower connecting section (601), a lower hexagonal nut block (602), a lower threaded section (603) and a lower sealing section (604) which are integrally connected in sequence from bottom to top; a lower annular groove (607) is provided at the connection between the lower threaded section (603) and the lower sealing section (604); the lower oil delivery plug (6) is detachably mounted at the lower port of the oil cylinder chamber (201) via the threads on the lower threaded section (603); the outer surface diameter of the lower sealing section (604) is smaller than the inner surface diameter of the oil cylinder chamber (201), and a lower oil passage chamber is provided between the two; and the inner surface of the lower sealing section (604) is slidably sealedly connected to the outer surface of the hydraulic rod (3).

9. The rivet gun head for an automobile riveting robot according to claim 8, characterized in that: A lower oil inlet and outlet hole (606) is provided on the outer surface of the lower hexagonal nut block (602), and the lower oil inlet and outlet hole (606) is a blind hole. A lower connecting hole (608) is provided inside the lower threaded section (603), and the lower end of the lower connecting hole (608) is communicated with the lower oil inlet and outlet hole (606), and the upper end of the lower connecting hole (608) passes through the upper end surface of the lower sealing section (604), and the middle part of the lower connecting hole (608) is communicated with the lower annular groove (607).

10. The rivet gun head for an automobile riveting robot according to claim 9, characterized in that: The riveting device (4) comprises a pull head cylinder (401), the upper end of which is fixedly mounted on the lower connecting section (601) of the lower oil delivery plug (6) by means of a threaded connection, a conical cylinder (403) is slidably mounted inside the pull head cylinder (401), and a movable cylinder (402) is threadedly connected to the upper end of the conical cylinder (403); the upper end of the movable cylinder (402) is fixedly connected to the lower end of the hydraulic rod (3); a conical hole is provided in the middle of the conical cylinder (403), and two symmetrically arranged inclined plane two clamping jaws (404) are slidably mounted in the conical hole, and a top joint (405) is provided above the inclined plane two clamping jaws (404) in the conical cylinder (403); A central hole is formed in the middle of the top joint (405), and a nail suction tube (406) is fixedly installed in the central hole; a nail suction hole (302) is coaxially formed in the middle of the hydraulic rod (3), and the upper end of the nail suction tube (406) extends a distance into the nail suction hole (302).

Images