Pin shaft connecting device and manufacturing method

Abstract

The invention belongs to the technical field of pin shafts, and particularly relates to a pin shaft connecting device and a manufacturing method.The pin shaft connecting device comprises a first pin shaft body, a first locking piece, a spring, a rotating shaft, a steel ball, an end cover screw and a drawing piece; according to the pin shaft connecting device, locking or unlocking of the pin shaft can be achieved by rotating (or pulling) the locking piece, locking or unlocking of the pin shaft can be achieved under the condition that tools are not configured, operation and use are convenient, the occupied space for installation is small, and light weight can be achieved easily; according to the pin shaft connecting device, the pin shaft body and the locking piece are integrally arranged, so that the pin shaft connecting device is easy to store and small in occupied storage space.

Description

Technical Field

[0001] The invention belongs to the technical field of pin shafts, and in particular relates to a pin shaft connection device and a manufacturing method thereof. Background Art

[0002] Pins are commonly used fastening parts in the machinery industry. They can be used for static fixed connection or relative movement with the connected parts. They are mainly used at the hinge of two parts to form a hinge connection. Pins are usually locked with cotter pins. They are reliable and easy to disassemble. Pin connections are widely used in the vehicle field. For example, in the connection of shaft and rod parts such as suspension and steering rods, it can be said that there is no vehicle without pins.

[0003] The existing pin connection assembly is assembled in such a way that the pin and the cotter pin are two independent parts. After the pin is installed in place, the cotter pin needs to be passed through the pin hole and then the two working ears of the cotter pin need to be bent and deformed to achieve locking. When disassembling, the two working ears of the cotter pin need to be bent straight and then pulled out of the pin hole before the pin can be extracted. The operation is cumbersome and requires the use of pliers and other tools. The cotter pin needs to be pulled out in a large space, which increases the size of the mechanical installation space and the size of the structure of the vehicle, which is not conducive to lightweight design. At the same time, the pin shaft platform is small in size and inconvenient to pull out. When the cotter pin and the pin are set independently, the probability of component loss is increased. The existence of these factors has caused the pin structure to be widely criticized in terms of vehicle use and maintenance. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The technical problems to be solved by the present invention are as follows: The first purpose is to provide a pin connection device, in which the pin body and the locking member are integrated, and the pin can be locked or opened by rotating (or) pulling the locking member, and a pull-out structure is arranged at the shaft end of the pin body, so that the space occupied is small, the pin can be locked or opened without configuring tools, and the operation and use are convenient, and the storage is easy, etc.

[0006] The second object of the present invention is to provide a method for manufacturing the above-mentioned pin connection device.

[0007] (II) Technical solution

[0008] In order to solve the above technical problems, the present invention provides a pin connection device, which includes: a pin body, a locking member, a spring, a rotating shaft, a steel ball, an end cover screw, and a pull-out member;

[0009] The locking member 1 is installed in a locking member 1 movement groove on the pin shaft body 1 through a rotating shaft parallel to the pin shaft body, and the locking and unlocking of the pin shaft is achieved by rotating the locking member 1 clockwise or counterclockwise along the circumferential direction of the pin shaft body 1;

[0010] The pin shaft body-head is provided with a locking member-movement groove evenly distributed along the circumference of the pin shaft, each locking member-movement groove is provided with a locking member-movement shaft hole and an end cover screw shaft hole, the locking member-movement shaft hole is arranged away from the center line of the pin shaft, the locking member-movement shaft hole and the end cover screw shaft hole are both threaded, a notch for accommodating the locking member head is left on the cross section of the pin shaft body-head, a pillow block is provided at the center of the pin shaft body-head, and a pillow block with an axially symmetrical through hole is also provided on the end face of the pin shaft body-pillar block;

[0011] The locking piece is divided into two parts: a head and a locking plate. The locking plate is provided with a rotating shaft hole and two steel ball matching holes, namely a locking hole and an unlocking hole. The head is thickened and protrudes from one end surface of the pin shaft body after installation, which is convenient for personnel to operate.

[0012] The rotating shaft is divided into two sections. The head section is a smooth shaft, which cooperates with the rotating shaft hole of the locking member and the rotating shaft hole of the pin shaft body. The tail section is provided with a threaded structure and a screwdriver slot, through which the rotating shaft can be screwed in and out, thereby realizing the installation of the rotating shaft.

[0013] The end cover screw is provided with an external thread which cooperates with the end cover screw hole of the pin shaft body, and a screwdriver slot is left, through which the end cover screw can be screwed in and out, thereby achieving the compression of the spring and the steel ball;

[0014] The end cover screw, spring and steel ball are installed in the end cover screw hole of the pin shaft body, and the steel ball is pressed toward the locking piece by the end cover screw through the spring. When it is in the locked state, the steel ball is pressed into the locking hole of the locking piece, and when it is in the unlocked state, the steel ball is pressed into the unlocking hole of the locking piece.

[0015] The drawer is installed in a through hole at one end of the pin shaft body axle platform to achieve the drawing and binding or hanging of the pin shaft body during temporary storage.

[0016] The pin connection device further comprises: a second pin body, a second locking member, a spring, a rotating shaft, a steel ball, an end cover screw, and a pull-out member;

[0017] The second locking member is vertically mounted on the second pin shaft body through a rotating shaft, and the locking and unlocking of the pin shaft are achieved by rotating the second locking member clockwise or counterclockwise along the axis direction of the second pin shaft body;

[0018] The pin shaft body 2 is provided with a through slot along the axis direction of the pin shaft body 2 at the head, and a through hole for installing the rotating shaft is provided near the head of the pin shaft body 2 and perpendicular to the through slot. The through holes are respectively provided with a threaded hole and a light hole on the left and right sides of the through slot, and the threaded hole is larger than the diameter of the light hole. An end cover screw installation hole is provided perpendicular to the through slot above the rotating shaft, and threads are formed on the end cover screw rotating shaft holes. The through slot at the head of the pin shaft body 2 can accommodate the rotation of the locking member 2, and a shaft platform with an axially symmetrical through hole is provided on the end face of the shaft platform of the pin shaft body 2;

[0019] The locking piece 2 is a thin plate symmetrical structure, which is larger in the middle and smaller at both ends. It is provided with a rotating shaft hole and N steel ball matching holes, namely a locking hole and an unlocking hole. When installed, it protrudes from the end face of the pin shaft body in the locked position. When unlocking, the locking piece 2 can be pushed forward or backward to be hidden in the cylindrical surface contour of the pin shaft body 2.

[0020] Wherein, the pin connection device also includes: a pin body three, a locking member three, a spring, a screw pin, and a pull member;

[0021] A combination of two cylindrical locking members with holes at one end and screw pins installed on them is installed on the through hole perpendicular to the pin shaft body three. By pulling or loosening the screw pins, the locking members three can move up and down in the vertical direction along the axis of the pin shaft body, thereby realizing the unlocking and locking of the pin shaft;

[0022] The pin shaft body 3 has a through hole (light hole) at the head thereof in a direction perpendicular to the axis of the pin shaft body, and the through hole can accommodate the locking member 3 to perform linear movement in and out along the center line of the hole. The head of the pin shaft body 3 is symmetrically provided with two circular grooves perpendicular to the through hole and symmetrical to the axis center line, and the screw pin can perform linear movement in the circular grooves. The end face of the second shaft platform of the pin shaft body is provided with a shaft platform with an axially symmetrical through hole.

[0023] The locking member 3 is cylindrical and has a screw hole structure on the head;

[0024] The screw pin is a two-section shaft structure, with a small front section and a large rear section. The front section is a screw rod that cooperates with the screw holes on the three heads of the pin shaft body, and the rear section is a smooth axis.

[0025] Among them, the surface hardness of locking part 1, locking part 2 and locking part 3 shall not be less than 55HRC;

[0026] The steel ball is made of GCr15 high carbon chromium bearing steel, and the surface hardness should be no less than 60HRC;

[0027] Among them, the pull-out piece adopts a split structure or an integral structure, and the material is 60Si2MnA spring steel wire.

[0028] In addition, the present invention also provides a method for manufacturing the pin connection device, which includes a method for manufacturing a pin body and a locking member;

[0029] The manufacturing method of the pin shaft body comprises the following steps:

[0030] Step 1, use round steel or bar stock to cut the pin shaft body and reserve material for the top hole;

[0031] Step 2, perform initial machining on each step and leave a margin;

[0032] Step 3, quenching and tempering treatment;

[0033] Step 4: Finish turning and step rounding, turning and milling the center material to ensure that the length and surface roughness are qualified;

[0034] Step 5, milling the motion groove and end face notch of the pin shaft body 1, or milling the motion groove of the pin shaft body 2, or processing the motion groove of the end face of the pin shaft body 3;

[0035] Step 6, drilling and threading;

[0036] Step 7, clean the burrs;

[0037] Step 8, surface quenching;

[0038] Step 9, polishing;

[0039] Step 10: surface coating treatment, including phosphating or oxidation treatment.

[0040] Among them, the thickness of the locking part is quite different, and its manufacturing method includes the following steps:

[0041] Step 11, using 60Si2MnA or 65Mn material to cut the locking part 1;

[0042] Step 12, milling the lock piece and the head;

[0043] Step 13, Drilling

[0044] Step 14, clean the burrs;

[0045] Step 15, prepare a quenching tool, the tool structure should be able to completely fix the locking plate 1, and adopt a splint structure;

[0046] Step 16, clamping and fixing the locking member 1 to the quenching tool;

[0047] Step 17, the locking member with the tooling is subjected to 830° C. salt bath quenching, 310° C. nitrate cooling and 510° C. tempering treatment;

[0048] Step 18, polishing;

[0049] Step 19, surface coating treatment, including phosphating or oxidation treatment;

[0050] The second method for manufacturing the locking member includes the following steps:

[0051] Step 21, using steel plate material to cut the locking member 2;

[0052] Step 22, milling and forming;

[0053] Step 23, Drilling

[0054] Step 24, cleaning burrs;

[0055] Step 25, surface quenching;

[0056] Step 26, polishing;

[0057] Step 27, surface coating treatment;

[0058] Among them, the method for manufacturing the locking part three and other shaft parts includes the following steps:

[0059] Step 31, using bar stock for blanking;

[0060] Step 32, turning into a shaft;

[0061] Step 33, rounding;

[0062] Step 34, drilling and tapping;

[0063] Step 35: Mill the screwdriver slot as needed

[0064] Step 36, cleaning burrs;

[0065] Step 37, quenching;

[0066] Step 38, polishing;

[0067] Step 39, surface coating treatment, including phosphating or oxidation treatment.

[0068] Among them, the pin shaft body should be subjected to tempering treatment after rough turning after cutting, and then fine turning, milling, drilling, tapping and other operations, and surface quenching, polishing and surface coating treatment, so as to ensure the toughness, strength, wear resistance and corrosion resistance of the pin shaft, thereby improving the reliability of the mechanism.

[0069] Among them, high manganese steel materials should be used for locking parts with large local wall thickness differences. After processing and forming, salt bath treatment should be carried out using plywood tooling to improve the surface hardness while ensuring surface parallelism. At the same time, polishing and surface coating treatments should be carried out accordingly to ensure the strength, wear resistance and corrosion resistance of the pin parts, thereby improving the reliability of the mechanism.

[0070] Among them, the locking parts with little thickness change should be quenched, polished and surface coated after processing and forming, so as to ensure the strength, wear resistance and corrosion resistance of the pin parts, thereby improving the reliability of the mechanism;

[0071] The drawer and the spring are manufactured according to the manufacturing method of the spring steel wire.

[0072] (III) Beneficial effects

[0073] Compared with the prior art, the present invention has the following beneficial effects:

[0074] (1) The pin connection device can lock or open the pin by rotating (or) pulling the locking member, and can lock or open the pin without configuring tools. It is easy to operate and use, takes up little space for installation, and is conducive to achieving lightweight.

[0075] (2) The pin shaft connecting device has an integrated pin shaft body and a locking member, which is easy to store and occupies little storage space;

[0076] (3) The pin connection device is provided with a pull-out structure for easy installation and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0078] Figure 2 It is the front view and left view of the overall structure of the first embodiment of the present invention;

[0079] Figure 3 It is a schematic diagram of the overall structure of the first embodiment of the present invention, including the front view, left view and right view;

[0080] Figure 4 It is a structural schematic diagram of a pin shaft body 1 of an implementation example 1 of the present invention;

[0081] Figure 5 It is a structural schematic diagram of a locking member 1 of the first embodiment of the present invention;

[0082] Figure 6 It is a schematic diagram of the structure of the end cover bolts of the first embodiment of the present invention;

[0083] Figure 7 It is a schematic diagram of the structure of the end cover bolts of the first embodiment of the present invention;

[0084] Figure 8 This is a schematic diagram of the overall structure of the second implementation example of the present invention;

[0085] Fig. 9 It is a structural schematic diagram of the second pin body of the second implementation example of the present invention;

[0086] Fig.10 It is a structural schematic diagram of the second locking member of the second implementation example of the present invention;

[0087] Fig.11 This is a schematic diagram of the overall structure of the third implementation example of the present invention;

[0088] Fig.12 It is a structural schematic diagram of the pin shaft body 3 of the third embodiment of the present invention;

[0089] Fig.13 It is a structural schematic diagram of the locking member 3 of the third embodiment of the present invention;

[0090] Fig.14 It is a structural schematic diagram of a screw pin in the third implementation example of the present invention;

[0091] Fig.15 It is a schematic diagram of the structure of the drawer;

[0092] Fig.16 A method for manufacturing a pin shaft body according to an embodiment of the present invention;

[0093] Fig.17 A method for manufacturing a locking member 1 of an implementation example of the present invention;

[0094] Fig.18 This is a manufacturing method of the second locking member of the implementation case of the present invention;

[0095] Fig.19 The invention provides a method for manufacturing the locking member 3 and the screw pin, the end cover bolt and the pin shaft according to the implementation case of the invention;

[0096] In the figure: 1-pin body 1; 2-locking piece 1; 3-steel ball; 4-spring; 5-end cover screw; 6-rotating shaft; 7-pull-out piece; 8-pin body 2; 9-locking piece 2; 12-pin body 3; 13-screw pin; 14-locking piece 3;

[0097] 111-locking threaded hole, 112-rotating shaft threaded hole, 113-rotating shaft hole, 114-drawing piece hole, 115-notch, 116 locking groove, 121-step one, 122-pin shaft end, 123-end cover, 124-drawing section, 131-small end face, 132-end face, 133-pressing face;

[0098] 211 - locking hole, 212 - unlocking hole, 213 - shaft hole, 214 - unlocking surface, 215 - outer edge surface, 216 - locking surface, 221 - locking segment, 222 - head;

[0099] 511-screwdriver slot, 512-pressing surface;

[0100] 611-screwdriver groove, 612-thread segment, 613-rotating shaft segment;

[0101] 811-locking threaded hole, 812-rotating shaft threaded hole, 813-drawing piece hole, 814-rotating shaft hole, 821-drawing section, 822-end cover, 823-pin shaft end, 824-locking groove, 831-end face, 832-locking groove yielding face, 833-pressing face;

[0102] 911-unlocking hole, 912-locking hole, 913 shaft hole, 921-head, 922-locking surface, 923-outer edge;

[0103] 1211-through hole, 1212-locking groove, 1213-drawing piece hole, 1221-pin shaft section, 1222-end cover, 1223-drawing section, 1231-pressing surface, 1232-end surface;

[0104] 1311-screwdriver groove, 1321-shaft section, 1322-thread section;

[0105] 711-external leakage section, 712-introduction section. DETAILED DESCRIPTION

[0106] In order to make the purpose, content, and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings and embodiments;

[0107] In order to solve the above technical problems, the present invention provides a pin connection device, which includes: a pin body, a locking member, a spring, a rotating shaft, a steel ball, an end cover screw, and a pull-out member;

[0108] The locking member 1 is installed in a locking member 1 movement groove on the pin shaft body 1 through a rotating shaft parallel to the pin shaft body, and the locking and unlocking of the pin shaft is achieved by rotating the locking member 1 clockwise or counterclockwise along the circumferential direction of the pin shaft body 1;

[0109] The pin shaft body-head is provided with a locking member-movement groove evenly distributed along the circumference of the pin shaft, each locking member-movement groove is provided with a locking member-movement shaft hole and an end cover screw shaft hole, the locking member-movement shaft hole is arranged away from the center line of the pin shaft, the locking member-movement shaft hole and the end cover screw shaft hole are both threaded, a notch for accommodating the locking member head is left on the cross section of the pin shaft body-head, a pillow block is provided at the center of the pin shaft body-head, and a pillow block with an axially symmetrical through hole is also provided on the end face of the pin shaft body-pillar block;

[0110] The locking piece is divided into two parts: a head and a locking plate. The locking plate is provided with a rotating shaft hole and two steel ball matching holes, namely a locking hole and an unlocking hole. The head is thickened and protrudes from one end surface of the pin shaft body after installation, which is convenient for personnel to operate.

[0111] The rotating shaft is divided into two sections. The head section is a smooth shaft, which cooperates with the rotating shaft hole of the locking member and the rotating shaft hole of the pin shaft body. The tail section is provided with a threaded structure and a screwdriver slot, through which the rotating shaft can be screwed in and out, thereby realizing the installation of the rotating shaft.

[0112] The end cover screw is provided with an external thread which cooperates with the end cover screw hole of the pin shaft body, and a screwdriver slot is left, through which the end cover screw can be screwed in and out, thereby achieving the compression of the spring and the steel ball;

[0113] The end cover screw, spring and steel ball are installed in the end cover screw hole of the pin shaft body, and the steel ball is pressed toward the locking piece by the end cover screw through the spring. When it is in the locked state, the steel ball is pressed into the locking hole of the locking piece, and when it is in the unlocked state, the steel ball is pressed into the unlocking hole of the locking piece.

[0114] The drawer is installed in a through hole at one end of the pin shaft body axle platform to achieve the drawing and binding or hanging of the pin shaft body during temporary storage.

[0115] The pin connection device further comprises: a second pin body, a second locking member, a spring, a rotating shaft, a steel ball, an end cover screw, and a pull-out member;

[0116] The second locking member is vertically mounted on the second pin shaft body through a rotating shaft, and the locking and unlocking of the pin shaft are achieved by rotating the second locking member clockwise or counterclockwise along the axis direction of the second pin shaft body;

[0117] The pin shaft body 2 is provided with a through slot along the axis direction of the pin shaft body 2 at the head, and a through hole for installing the rotating shaft is provided near the head of the pin shaft body 2 and perpendicular to the through slot. The through holes are respectively provided with a threaded hole and a light hole on the left and right sides of the through slot, and the threaded hole is larger than the diameter of the light hole. An end cover screw installation hole is provided perpendicular to the through slot above the rotating shaft, and threads are formed on the end cover screw rotating shaft holes. The through slot at the head of the pin shaft body 2 can accommodate the rotation of the locking member 2, and a shaft platform with an axially symmetrical through hole is provided on the end face of the shaft platform of the pin shaft body 2;

[0118] The locking piece 2 is a thin plate symmetrical structure, which is larger in the middle and smaller at both ends. It is provided with a rotating shaft hole and N steel ball matching holes, namely a locking hole and an unlocking hole. When installed, it protrudes from the end face of the pin shaft body in the locked position. When unlocking, the locking piece 2 can be pushed forward or backward to be hidden in the cylindrical surface contour of the pin shaft body 2.

[0119] Wherein, the pin connection device also includes: a pin body three, a locking member three, a spring, a screw pin, and a pull member;

[0120] A combination of two cylindrical locking members with holes at one end and screw pins installed on them is installed on the through hole perpendicular to the pin shaft body three. By pulling or loosening the screw pins, the locking members three can move up and down in the vertical direction along the axis of the pin shaft body, thereby realizing the unlocking and locking of the pin shaft;

[0121] The pin shaft body 3 has a through hole (light hole) at the head thereof in a direction perpendicular to the axis of the pin shaft body, and the through hole can accommodate the locking member 3 to perform linear movement in and out along the center line of the hole. The head of the pin shaft body 3 is symmetrically provided with two circular grooves perpendicular to the through hole and symmetrical to the axis center line, and the screw pin can perform linear movement in the circular grooves. The end face of the second shaft platform of the pin shaft body is provided with a shaft platform with an axially symmetrical through hole.

[0122] The locking member 3 is cylindrical and has a screw hole structure on the head;

[0123] The screw pin is a two-section shaft structure, with a small front section and a large rear section. The front section is a screw rod that cooperates with the screw holes on the three heads of the pin shaft body, and the rear section is a smooth axis.

[0124] Among them, the surface hardness of locking part 1, locking part 2 and locking part 3 shall not be less than 55HRC;

[0125] The steel ball is made of GCr15 high carbon chromium bearing steel, and the surface hardness should be no less than 60HRC;

[0126] Among them, the pull-out piece adopts a split structure or an integral structure, and the material is 60Si2MnA spring steel wire.

[0127] In addition, the present invention also provides a method for manufacturing the pin connection device, which includes a method for manufacturing a pin body and a locking member;

[0128] The manufacturing method of the pin shaft body comprises the following steps:

[0129] Step 1, use round steel or bar stock to cut the pin shaft body and reserve material for the top hole;

[0130] Step 2, perform initial machining on each step and leave a margin;

[0131] Step 3, quenching and tempering treatment;

[0132] Step 4: Finish turning and step rounding, turning and milling the center material to ensure that the length and surface roughness are qualified;

[0133] Step 5, milling the motion groove and end face notch of the pin shaft body 1, or milling the motion groove of the pin shaft body 2, or processing the motion groove of the end face of the pin shaft body 3;

[0134] Step 6, drilling and threading;

[0135] Step 7, clean the burrs;

[0136] Step 8, surface quenching;

[0137] Step 9, polishing;

[0138] Step 10: surface coating treatment, including phosphating or oxidation treatment.

[0139] Among them, the thickness of the locking part is quite different, and its manufacturing method includes the following steps:

[0140] Step 11, using 60Si2MnA or 65Mn material to cut the locking part 1;

[0141] Step 12, milling the lock piece and the head;

[0142] Step 13, Drilling

[0143] Step 14, clean the burrs;

[0144] Step 15, prepare a quenching tool, the tool structure should be able to completely fix the locking plate 1, and adopt a splint structure;

[0145] Step 16, clamping and fixing the locking member 1 to the quenching tool;

[0146] Step 17, the locking member with the tooling is subjected to 830° C. salt bath quenching, 310° C. nitrate cooling and 510° C. tempering treatment;

[0147] Step 18, polishing;

[0148] Step 19, surface coating treatment, including phosphating or oxidation treatment;

[0149] The second method for manufacturing the locking member includes the following steps:

[0150] Step 21, using steel plate material to cut the locking member 2;

[0151] Step 22, milling and forming;

[0152] Step 23, Drilling

[0153] Step 24, cleaning burrs;

[0154] Step 25, surface quenching;

[0155] Step 26, polishing;

[0156] Step 27, surface coating treatment;

[0157] Among them, the method for manufacturing the locking part three and other shaft parts includes the following steps:

[0158] Step 31, using bar stock for blanking;

[0159] Step 32, turning into a shaft;

[0160] Step 33, rounding;

[0161] Step 34, drilling and tapping;

[0162] Step 35: Mill the screwdriver slot as needed

[0163] Step 36, cleaning burrs;

[0164] Step 37, quenching;

[0165] Step 38, polishing;

[0166] Step 39, surface coating treatment, including phosphating or oxidation treatment.

[0167] Among them, the pin shaft body should be subjected to tempering treatment after rough turning after cutting, and then fine turning, milling, drilling, tapping and other operations, and surface quenching, polishing and surface coating treatment, so as to ensure the toughness, strength, wear resistance and corrosion resistance of the pin shaft, thereby improving the reliability of the mechanism.

[0168] Among them, high manganese steel materials should be used for locking parts with large local wall thickness differences. After processing and forming, salt bath treatment should be carried out using plywood tooling to improve the surface hardness while ensuring surface parallelism. At the same time, polishing and surface coating treatments should be carried out accordingly to ensure the strength, wear resistance and corrosion resistance of the pin parts, thereby improving the reliability of the mechanism.

[0169] Among them, the locking parts with little thickness change should be quenched, polished and surface coated after processing and forming, so as to ensure the strength, wear resistance and corrosion resistance of the pin parts, thereby improving the reliability of the mechanism;

[0170] The drawer and the spring are manufactured according to the manufacturing method of the spring steel wire.

[0171] Example 1

[0172] The first purpose of this embodiment is to provide a pin connection device, in which the pin body and the locking piece are integrated, and the pin can be locked or opened by rotating (or) pulling the locking piece. The pin body shaft end is provided with a pull-out structure, which can realize small space occupation, and the pin can be locked or opened without configuring tools, and is easy to operate and use, and easy to store.

[0173] As an example, Figure 1-Figure 7 and Fig.15 As shown, the pin connection device includes: a plurality of (three in one example) locking member structures (including a locking member, a spring, a rotating shaft, a steel ball, and an end cover screw) are evenly distributed in the circumferential direction of a pin body (1), a locking piece 222 of each locking member (2) is inserted into the locking groove 116 of the pin body (1), and the head 221 faces the end face 132 of the pin body (1), and the rotating shaft 613 of the shaft (6) passes through the rotating shaft hole 113 of the locking member (1) and extends into the rotating shaft hole 113 of the pin body (1), and the threaded section 612 of the shaft (6) cooperates with the rotating shaft threaded hole 112 of the pin body (1) and is screwed on the screwdriver. The locking hole 211 is basically aligned with the locking threaded hole of the pin shaft body 1 by rotating the head 221 of the locking member 1 (2), and the steel ball (3) and the spring (4) are sequentially installed. The screwdriver is used to act on the screwdriver groove of the end cover screw (5) so that the pressing surface 511 is pressed against the spring (4) and the steel ball provides a certain pressure on the locking member 1 to ensure that it can be positioned in the locking hole 211 or the unlocking hole 212, thereby ensuring that the locking member 1 is rotated clockwise or counterclockwise along the circumferential direction of the pin shaft body 1 to achieve locking and unlocking of the pin shaft. When in the unlocking position, as shown in FIG. Figure 3 As shown, the head of the locking member 1 (2) extends into the notch 115 of the pin shaft body 1 (1); the drawer member (7) extends into the drawer member hole 114 of the pin shaft body 1 (1) through the extending section 712, and the drawer member (7) can be pulled or lifted by pulling the outer leakage section 711, which is convenient for operation and management. When the contact force of the pin shaft connection device is large, the operation of disassembling or loading the workpiece can be achieved by knocking the small end surface 131 or the pressing surface 133 of the pin shaft body 1 (1);

[0174] As an example, Figure 6-10 and Fig.15 As shown, the pin connection device comprises: a pin body 2, a locking member 2, a spring, a rotating shaft, a steel ball, an end cover screw, a pull-out member, etc. The locking surface 922 of the locking member 2 (9) is inserted into the locking groove 824 of the pin body 2 (8), and the rotating shaft 613 of the shaft (6) passes through the rotating shaft hole 912 of the locking member 2 (9) and extends into the rotating shaft hole 814 of the pin body 2 (8), and the threaded section 612 of the shaft (6) cooperates with the rotating shaft threaded hole 812 of the pin body 2 (8) and is tightened and installed under the drive of the screwdriver groove 611. The locking hole 211 is basically aligned with the locking threaded hole of the pin body 1 by rotating the head 921 of the locking member 2 (9), and the steel ball (3) and the spring (4) are installed in turn, and the screwdriver acts on the screwdriver groove of the end cover screw (5) to press the pressing surface 511 against the spring (4) and then the steel ball (3) and the spring (4) are installed in turn. The ball (3) provides a certain pressure on the locking member 2 (8) to ensure that it can be positioned in the locking hole 911 or the unlocking hole 912, thereby ensuring that the locking and unlocking of the pin shaft can be achieved by rotating the locking member 2 along the rotating shaft 613 of the shaft (6) clockwise or counterclockwise. When in the unlocking position, the head 923 at one end of the locking member 2 (2) extends into the locking groove 824 of the pin shaft body 2 (8) and does not protrude from the pin shaft section 823; the pull-out member (7) extends into the pull-out member hole 114 of the pin shaft body 2 (1) through the extension section 712, and the pull-out or lifting of the pin shaft device can be achieved by pulling the outer leakage section 711 of the pull-out member (7), which is convenient for operation and management. When the fitting force of the pin shaft connection device is large, the operation of disassembling or installing the workpiece can be achieved by knocking on the end face 831 or the pressing face 833 of the pin shaft body 2 (8);

[0175] As an example, Figure 11-15As shown, the pin connection device includes: a pin body 3, a locking member 3, a spring, a screw pin, a spring, a pull-out member, etc. The locking member 3 (14) is installed in the through hole 1211 of the pin body 3 (12), and the position of the locking member 3 (14) is adjusted to ensure that its threaded hole faces the locking hole 1212 at the end face 1232 of the pin body 3 (12). The threaded section 1322 is screwed with the locking member 3 (14) thread through the screwdriver groove 1311 of the screw pin (13), so that the linear movement of the single-side locking member in the locking groove 1212 of the pin body 3 (12) can be realized. A spring and another locking member 3 (14) are installed in the through hole 1211 of the pin body 3 (12), and the position of the locking member 3 (14) is adjusted to ensure that its threaded hole faces the locking hole 1212 at the end face 1232 of the pin body 3 (12). The locking hole 1212 is used to tighten the threaded section 1322 and the locking member 3 (14) through the screwdriver groove 1311 of the screw pin (13). After the above work is completed, the pin can be unlocked and locked by pressing the screw pin (13) inward or pushing it outward. When in the unlocked position, the locking member 3 (14) does not protrude from the pin section 1221 of the pin body 3 (12); the drawer (7) is inserted into the drawer hole 1213 of the pin body 3 (12) through the insertion section 712. The drawer device can be pulled or lifted by pulling the outer leakage section 711 of the drawer (7), which is convenient for operation and management. When the fitting force of the pin connection device is large, the operation of disassembling or loading the workpiece can be achieved by knocking the end face 1232 or the pressing face 1231 of the pin body 3 (12);

[0176] The second purpose of this embodiment is to provide a method for manufacturing a pin connection device, including a method for manufacturing a pin and a locking member;

[0177] As an example, the pin body (1) is pressed Fig.16 The method shown in the figure is to make the locking member 1 (2) by pressing Fig.17 The method shown in the figure is to manufacture the rotating shaft (6) and the end cover screw (5) according to Fig.19 The parts are made by the method shown, and other parts are made by the general method. After the parts are made, they are assembled;

[0178] As an example, the pin body 2 (8) is pressed Fig.16 The method shown in the figure is to make the locking member 2 (9) by Fig.18 The method shown in the figure is to manufacture the rotating shaft (6) and the end cover screw (5) according to Fig.19 The parts are made by the method shown, and other parts are made by the general method. After the parts are made, they are assembled;

[0179] As an example, the pin body three (1) press Fig.16 The method shown in the figure is to manufacture the locking member 3 (14) and the screw pin (13) according to Fig.19 The parts are made by the method shown, and other parts are made by the general method. After the parts are made, they are assembled.

[0180] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A pin connection device, characterized in that: The pin connection device comprises: a pin body, a locking member, a spring, a rotating shaft, a steel ball, an end cover screw, and a pull-out member; The locking member 1 is installed in a locking member 1 movement groove on the pin shaft body 1 through a rotating shaft parallel to the pin shaft body, and the locking and unlocking of the pin shaft is achieved by rotating the locking member 1 clockwise or counterclockwise along the circumferential direction of the pin shaft body 1; The pin shaft body-head is provided with a locking member-movement groove evenly distributed along the circumference of the pin shaft, each locking member-movement groove is provided with a locking member-movement shaft hole and an end cover screw shaft hole, the locking member-movement shaft hole is arranged away from the center line of the pin shaft, the locking member-movement shaft hole and the end cover screw shaft hole are both threaded, a notch for accommodating the locking member head is left on the cross section of the pin shaft body-head, a pillow block is provided at the center of the pin shaft body-head, and a pillow block with an axially symmetrical through hole is also provided on the end face of the pin shaft body-pillar block; The locking piece is divided into two parts: a head and a locking plate. The locking plate is provided with a rotating shaft hole and two steel ball matching holes, namely a locking hole and an unlocking hole. The head is thickened and protrudes from one end surface of the pin shaft body after installation, which is convenient for personnel to operate. The rotating shaft is divided into two sections. The head section is a smooth shaft, which cooperates with the rotating shaft hole of the locking member and the rotating shaft hole of the pin shaft body. The tail section is provided with a threaded structure and a screwdriver slot, through which the rotating shaft can be screwed in and out, thereby realizing the installation of the rotating shaft. The end cover screw is provided with an external thread which cooperates with the end cover screw hole of the pin shaft body, and a screwdriver slot is left, through which the end cover screw can be screwed in and out, thereby achieving the compression of the spring and the steel ball; The end cover screw, spring and steel ball are installed in the end cover screw hole of the pin shaft body, and the steel ball is pressed toward the locking piece by the end cover screw through the spring. When it is in the locked state, the steel ball is pressed into the locking hole of the locking piece, and when it is in the unlocked state, the steel ball is pressed into the unlocking hole of the locking piece. The drawer is installed in a through hole at one end of the pin shaft body axle platform to achieve the drawing and tying or hanging of the pin shaft body during temporary storage.

2. The pin connection device according to claim 1, characterized in that: The pin connection device also includes: a second pin body, a second locking member, a spring, a rotating shaft, a steel ball, an end cover screw, and a pull-out member; The second locking member is vertically mounted on the second pin shaft body through a rotating shaft, and the locking and unlocking of the pin shaft are achieved by rotating the second locking member clockwise or counterclockwise along the axis direction of the second pin shaft body; The pin shaft body 2 is provided with a through slot along the axis direction of the pin shaft body 2 at the head, and a through hole for installing the rotating shaft is provided near the head of the pin shaft body 2 and perpendicular to the through slot. The through holes are respectively provided with a threaded hole and a light hole on the left and right sides of the through slot, and the threaded hole is larger than the diameter of the light hole. An end cover screw installation hole is provided perpendicular to the through slot above the rotating shaft, and threads are formed on the end cover screw rotating shaft holes. The through slot at the head of the pin shaft body 2 can accommodate the rotation of the locking member 2, and a shaft platform with an axially symmetrical through hole is provided on the end face of the shaft platform of the pin shaft body 2; The locking piece 2 is a thin plate symmetrical structure, which is larger in the middle and smaller at both ends. It is provided with a rotating shaft hole and N steel ball matching holes, namely a locking hole and an unlocking hole. When installed, it protrudes from the end face of the pin shaft body in the locked position. When unlocking, the locking piece 2 can be pushed forward or backward to be hidden in the cylindrical surface contour of the pin shaft body 2.

3. The pin connection device according to claim 2, characterized in that: The pin connection device also includes: a pin body three, a locking member three, a spring, a screw pin, and a pull member; A combination of two cylindrical locking members with holes at one end and screw pins installed on them is installed on the through hole perpendicular to the pin shaft body three. By pulling or loosening the screw pins, the locking members three can move up and down in the vertical direction along the axis of the pin shaft body, thereby realizing the unlocking and locking of the pin shaft; The pin shaft body 3 has a through hole at the head thereof in a direction perpendicular to the axis of the pin shaft body, and the through hole can accommodate the locking member 3 to perform linear movement in and out along the center line of the hole. The head of the pin shaft body 3 is symmetrically provided with two circular grooves perpendicular to the through hole and symmetrical to the axis center line, and the screw pin can perform linear movement in the circular grooves. The end face of the second shaft platform of the pin shaft body is provided with a pillow block with an axially symmetrical through hole. The locking member 3 is cylindrical and has a screw hole structure on the head; The screw pin is a two-section shaft structure, with a small front section and a large rear section. The front section is a screw rod that cooperates with the screw holes on the three heads of the pin shaft body, and the rear section is a smooth axis.

4. The pin connection device according to claim 3, characterized in that: The surface hardness of locking part 1, locking part 2 and locking part 3 shall not be less than 55HRC; The steel ball is made of GCr15 high carbon chromium bearing steel, and the surface hardness should be no less than 60HRC.

5. The pin connection device according to claim 4, characterized in that: The pull-out piece adopts a split structure or an integral structure, and the material is 60Si2MnA spring steel wire.

6. A method for manufacturing a pin connection device as claimed in claim 3, characterized in that: Including a manufacturing method of a pin shaft body and a locking member; The manufacturing method of the pin shaft body comprises the following steps: Step 1, use round steel or bar stock to cut the pin shaft body and reserve material for the top hole; Step 2, perform initial machining on each step and leave a margin; Step 3, quenching and tempering treatment; Step 4: Finish turning and step rounding, turning and milling the center material to ensure that the length and surface roughness are qualified; Step 5, milling the motion groove and end face notch of the pin shaft body 1, or milling the motion groove of the pin shaft body 2, or processing the motion groove of the end face of the pin shaft body 3; Step 6, drilling and threading; Step 7, clean the burrs; Step 8, surface quenching; Step 9, polishing; Step 10: surface coating treatment, including phosphating or oxidation treatment.

7. The method for manufacturing a pin connection device according to claim 6, characterized in that: The thickness of the locking part varies greatly, and its manufacturing method includes the following steps: Step 11, using 60Si2MnA or 65Mn material to cut the locking part 1; Step 12, milling the lock piece and the head; Step 13, Drilling Step 14, clean the burrs; Step 15, prepare a quenching tool, the tool structure should be able to completely fix the locking plate 1, and adopt a splint structure; Step 16, clamping and fixing the locking member 1 to the quenching tool; Step 17, the locking member with the tooling is subjected to 830° C. salt bath quenching, 310° C. nitrate cooling and 510° C. tempering treatment; Step 18, polishing; Step 19, surface coating treatment, including phosphating or oxidation treatment; The second method for manufacturing the locking member includes the following steps: Step 21, using steel plate material to cut the locking member 2; Step 22, milling and forming; Step 23, Drilling Step 24, cleaning burrs; Step 25, surface quenching; Step 26, polishing; Step 27, surface coating treatment; Among them, the method for manufacturing the locking part three and other shaft parts includes the following steps: Step 31, using bar stock for blanking; Step 32, turning into a shaft; Step 33, rounding; Step 34, drilling and tapping; Step 35: Mill the screwdriver slot as needed Step 36, cleaning burrs; Step 37, quenching; Step 38, polishing; Step 39, surface coating treatment, including phosphating or oxidation treatment.

8. The method for manufacturing a pin connection device according to claim 7, characterized in that: The pin shaft body should be subjected to tempering treatment after rough turning after cutting, and then fine turning, milling, drilling, tapping and other operations, and surface quenching, polishing and surface coating treatment, so as to ensure the toughness, strength, wear resistance and corrosion resistance of the pin shaft, thereby improving the reliability of the mechanism.

9. The method for manufacturing a pin connection device according to claim 8, characterized in that: For locking parts with large local wall thickness differences, high manganese steel materials should be used. After processing and forming, salt bath treatment should be carried out using plywood tooling to improve the surface hardness while ensuring surface parallelism. At the same time, polishing and surface coating treatments should be carried out accordingly to ensure the strength, wear resistance and corrosion resistance of the pin parts, thereby improving the reliability of the mechanism.

10. The method for manufacturing a pin connection device according to claim 9, characterized in that: Locking parts with little thickness change should be quenched, polished and surface coated after processing to ensure the strength, wear resistance and corrosion resistance of the pin parts, thereby improving the reliability of the mechanism; The drawer and the spring are manufactured according to the manufacturing method of the spring steel wire.

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