Flat position pin shaft and chain plate press fitting tool for chain production and use method

Abstract

The application discloses a flat-position pin shaft and chain plate press-fitting tool for chain production, which comprises a tool frame composed of a bottom plate, a front plate, a rear plate and an upper plate; the upper plate is provided with a press-fitting station above the upper plate, so that two pin shafts and a chain plate are placed on the press-fitting station for press fitting; a deviation rectifying and locking mechanism is arranged on the right side in the tool frame, and the deviation rectifying and locking mechanism is in contact with the flat-position parts of the two pin shafts, so that the flat-position directions of the two pin shafts are rectified to be consistent, and the two pin shafts are locked; an unlocking mechanism is arranged on the left side in the tool frame, and the unlocking mechanism is linked with the deviation rectifying and locking mechanism, so that the deviation rectifying and locking mechanism is automatically locked or unlocked under the linkage of the unlocking mechanism. The deviation rectifying and locking mechanism, the unlocking mechanism and a floating supporting plate in the flat-position pin shaft and chain plate press-fitting tool for chain production are in linkage, and no external power is needed; only the pressing force of a press machine can realize deviation rectifying, locking and ejection actions, and the whole press-fitting process is extremely cleverly completed.

Description

Technical Field

[0001] This invention relates to the field of conveyor chain technology, and in particular to a flat pin and chain plate pressing tool for chain production and its usage method. Background Technology

[0002] Chain drive is an important form of mechanical transmission. Transmission chains are generally bushing roller chains, consisting of inner chain plates, outer chain plates, bushings, and rollers.

[0003] The pin and chain plate are fitted with an interference fit; in the assembly process, such as Figure 1 As shown, typically two pins 100 are inserted into the mounting holes at both ends of the chain plate 200. Then, the operator needs to use a hammer to tap the two pins 100 sequentially to achieve an interference fit between the two pins 100 and the chain plate 200. Figure 2 As shown.

[0004] For the pin 100 with a flat design, the traditional assembly method using a hammer will cause the pin 100 to rotate in the mounting hole of the chain plate 200 during repeated hammering, resulting in inconsistent flat orientations of the two pins 100 and affecting subsequent assembly.

[0005] Although some auxiliary tooling is currently available for assembly, the following problems still exist during the assembly process: First, the flatness direction of the pin 100 cannot be restricted, resulting in inconsistent flatness directions of the two pins 100 after assembly; second, due to machining errors of the pin 100 and the chain plate 200, the pin 100 will exhibit an outward V-shape after being installed in the chain plate 200 (e.g., ...). Figure 3 (as shown) or pigeon-toed (such as) Figure 4 (as shown) or other types; this will not only affect the difficulty of subsequent assembly, but also cause the assembled components to get stuck in the tooling and unable to be removed due to the deformation of the chain plate 200. Summary of the Invention

[0006] The purpose of this invention is to provide a flat pin and chain plate pressing fixture and its usage method for chain production, so as to solve the defects of existing flat pin and chain plate assembly fixtures.

[0007] To solve the above-mentioned technical problems, the present invention provides a tooling for pressing flat pins and chain plates for chain production, comprising a tooling frame composed of a base plate, a front plate, a rear plate and an upper plate; The upper plate has a pressing station above it, where two pins and chain plates are placed for pressing. A correction and locking mechanism is provided on the right side of the tooling frame. It contacts the flat portion of the two pins and can correct the flat direction of the two pins to be consistent, while locking the two pins. An unlocking mechanism is provided on the left side of the tooling frame. It is linked with the correction and locking mechanism, so that the correction and locking mechanism can automatically lock or unlock the two pins under the linkage of the unlocking mechanism.

[0008] Preferably, the correction and locking mechanism includes a pressure plate and a correction plate fixedly connected to the pressure plate; the correction plate is provided with symmetrical correction parts on both sides, and the two correction parts correspond to the flat positions of the two pins respectively.

[0009] Preferably, a locking spring is provided on one side of the pressure plate, and the other end of the locking spring abuts against the front plate. Under the elastic force of the locking spring, the correction plate is pushed to correct and lock the flatness direction of the two pins. The pressure plate has a sliding cylinder on the side away from the locking spring. The sliding cylinder is slidably connected to the upper plate, so that the correction locking mechanism can slide left and right along the sliding cylinder.

[0010] Preferably, the unlocking mechanism includes an unlocking movable plate and an unlocking spring; the unlocking movable plate is slidably installed inside the rear plate, and the unlocking spring is located between the bottom end of the unlocking movable plate and the bottom plate, and pushes the unlocking movable plate to slide up and down under the action of the unlocking spring.

[0011] Preferably, the top of the unlocking movable plate protrudes from the upper plate and, under the action of an external press, overcomes the elastic force of the unlocking spring, pressing the unlocking movable plate downwards.

[0012] Preferably, the correction plate is further provided with rollers, the rollers corresponding to the inclined surface of the unlocking movable plate; when the unlocking movable plate moves up and down, the rollers roll on the inclined surface, causing the correction locking mechanism to move left and right.

[0013] Preferably, the spring force of the unlocking spring is greater than the spring force of the locking spring.

[0014] Preferably, the upper plate has two V-shaped grooves on the side that contacts the pin, corresponding to the two pins respectively; under the action of the correction plate, the pins are pushed to rotate around the axis in the V-shaped grooves until the flatness direction of the two pins is corrected to be consistent.

[0015] Preferably, a floating support plate is provided within the tooling frame to support the bottom end of the pin, and floating springs are symmetrically provided on both sides of the floating support plate, which move with the pressing of the pin under the action of the floating springs.

[0016] The present invention also provides a method for using a flat pin and chain plate pressing fixture for chain production, comprising the following steps: Step A: First, place the chain plate on the pressing station above the upper plate, and then insert the two pins into the pin holes at both ends of the chain plate until the bottom of the pins contacts the floating support plate. Step B: Then the external press or punch can be started. The lower press head first contacts the top of the unlocking movable plate and gradually moves downward. Step B1: While the unlocking movable plate moves downward, the roller in the correction locking mechanism rolls along the inclined surface, and the correction plate moves to the left under the action of the locking spring, so that the correction parts on both sides of the correction plate gradually contact the flat parts of the two pins and push the pins to rotate around the axis in the V-groove until the flat directions of the two pins are corrected to be consistent, and the two pins are locked at the same time. Step B2: The pressing head gradually moves downwards, pressing the two pins into the pin holes of the chain plate; during the pin pressing process, the floating support plate also compresses the floating spring and moves downwards under pressure until the two pins are pressed in. Step C: After pressing is completed, the lower pressing head moves upward. After the unlocking movable plate loses its downward pressure, it is pushed upward by the unlocking spring. At the same time, the inclined surface pushes the roller and the correction plate to move to the right, so that the correction parts on both sides of the correction plate gradually move away from the flat parts of the two pins. Step D: After unlocking, the floating tray moves upward under the action of the floating spring, thereby pushing out the pressed chain plate and pin.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. The chain production flat pin and chain plate pressing fixture is equipped with a correction and locking mechanism. Under the elastic force of the locking spring, the correction plate pushes the two pins to rotate around the axis in the corresponding V-grooves until the flatness direction of the two pins is corrected to be consistent, and the two pins are locked at the same time. Because of the addition of this correction and locking mechanism, the flatness direction of the two pins can be automatically corrected during the chain plate pressing process, thereby solving the problem that the chain plate deformation caused by inconsistent flatness direction during subsequent chain plate assembly will cause the assembled components to get stuck in the fixture and cannot be removed. 2. The flat pin used in chain production is linked with the correction locking mechanism, unlocking mechanism and floating support plate in the chain plate pressing tool. It does not require external power and can achieve correction, locking and ejection actions by only using the downward pressure of the press, which ingeniously completes the entire pressing process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembly of two pins and a chain plate provided by the present invention; Figure 2 This is a schematic diagram of the structure after the two pins and chain plates are pressed together, as provided by the present invention; Figure 3 This is a schematic diagram of the outward-pointing component provided by the present invention; Figure 4 This is a schematic diagram of the inward-pointing component provided by the present invention; Figure 5 This is a schematic diagram of the structure of a flat pin and chain plate pressing fixture for chain production provided by the present invention; Figure 6 This is a cross-sectional view of the press-fitting fixture provided by the present invention in the left-right direction; Figure 7 This is a schematic diagram of the structure of the correction and locking mechanism provided by the present invention; Figure 8 This is a cross-sectional view of the press-fitting fixture provided by the present invention in the front and rear directions; Figure 9 This is a schematic diagram of the alignment plate and the locking pin of the upper plate provided by the present invention; Figure 10 This is a schematic diagram of the process for correcting the flatness direction of the pin between the straightening plate and the upper plate provided by the present invention.

[0019] In the diagram: 100, pin; 200, chain plate; 1, base plate; 2, front plate; 3, rear plate; 4, upper plate; 5, correction locking mechanism; 6, unlocking mechanism; 7, floating support plate; 8, floating spring; 501, pressure plate; 502, correction plate; 5021, correction part; 503, locking spring; 504, sliding cylinder; 505, roller; 601, unlocking movable plate; 602, unlocking spring; 603, inclined surface. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In addition, the features, operations, and characteristics described in the specification can be combined in any suitable manner to form various embodiments. Similarly, the steps or actions described in the method can be rearranged in a manner that is readily apparent to those skilled in the art. Therefore, the various orders in the specification and drawings are merely for the purpose of clearly describing a particular embodiment and are not necessarily required orders, unless otherwise stated that a particular order must be followed.

[0024] Example 1 This invention provides a flat pin and chain plate pressing fixture for chain production. Please refer to [link / reference]. Figure 5 and Figure 6 The fixture frame includes a base plate 1, a front plate 2, a rear plate 3, and an upper plate 4. Above the upper plate 4 is a pressing station for placing two pins 100 and a chain plate 200 for pressing. A correction and locking mechanism 5 is provided on the right side of the fixture frame, which contacts the flat portions of the two pins 100, correcting their flattened directions and locking them simultaneously. An unlocking mechanism 6 is provided on the left side of the fixture frame, linked with the correction and locking mechanism 5, enabling the correction and locking mechanism 5 to automatically lock or unlock the two pins 100 under the linkage of the unlocking mechanism 6.

[0025] For details, please refer to Figure 7 The correction locking mechanism 5 includes a pressure plate 501 and a correction plate 502 fixedly connected to the pressure plate 501; the correction plate 502 is symmetrically provided with correction parts 5021 on both sides, and the two correction parts 5021 correspond to the flat positions of the two pins 100 respectively.

[0026] Furthermore, a locking spring 503 is provided on one side of the pressure plate 501, and the other end of the locking spring 503 abuts against the front plate 2. Under the elastic force of the locking spring 503, the correction plate 502 is pushed to correct and lock the flat position direction of the two pins 100. A sliding cylinder 504 is provided on the side of the pressure plate 501 away from the locking spring 503. The sliding cylinder 504 is slidably connected to the upper plate 4, so that the correction and locking mechanism 5 can slide left and right along the sliding cylinder 504.

[0027] For details, please refer to Figure 2 The unlocking mechanism 6 includes an unlocking movable plate 601 and an unlocking spring 602; the unlocking movable plate 601 is slidably installed in the rear plate 3, and the unlocking spring 602 is located between the bottom end of the unlocking movable plate 601 and the bottom plate 1, and the unlocking movable plate 601 is pushed up and down by the action of the unlocking spring 602.

[0028] Furthermore, the top of the unlocking movable plate 601 protrudes from the upper plate 4, and under the action of the external press, it first overcomes the elastic force of the unlocking spring 602 and presses the unlocking movable plate 601 downward.

[0029] Furthermore, the correction plate 502 is also provided with a roller 505, which corresponds to the inclined surface 603 of the unlocking movable plate 601; when the unlocking movable plate 601 moves up and down, the roller 505 rolls on the inclined surface 603, causing the correction locking mechanism 5 to move left and right.

[0030] Furthermore, the elastic force of the unlocking spring 602 is greater than that of the locking spring 503. Without external force, the unlocking mechanism 6 can continuously keep the correction locking mechanism 5 in the unlocked state.

[0031] For details, please refer to Figure 9 Two V-grooves 401 are provided on the side of the upper plate 4 that contacts the pin 100, corresponding to the two pins 100 respectively; under the action of the correction plate 502, the pins 100 are pushed to rotate around the axis in the V-grooves 401 until the flatness direction of the two pins 100 is corrected to be consistent.

[0032] For details, please refer to Figure 8 The tooling frame is also provided with a floating support plate 7 to support the bottom end of the pin 100, and floating springs 8 are symmetrically provided on both sides of the floating support plate 7. Under the action of the floating springs 8, the floating springs move with the pressing of the pin 100.

[0033] Example 2 The present invention also provides a method for using a flat pin and chain plate pressing fixture for chain production, comprising the following steps: Step A: First, place the chain plate 200 on the pressing station above the upper plate 4, and then insert the two pins 100 into the pin holes at both ends of the chain plate 200 until the bottom end of the pin 100 contacts the floating support plate 7. Step B: Then the external press or punch can be started. The lower press head first contacts the top of the unlocking movable plate 601 and gradually moves downward. Step B1: As the unlocking movable plate 601 descends, the roller 505 in the correction locking mechanism 5 rolls along the inclined surface 603, and the correction plate 502 moves to the left under the action of the locking spring 503. This causes the correction portions 5021 on both sides of the correction plate 502 to gradually contact the flat portions of the two pins 100, pushing the pins 100 to rotate around the axis in the V-groove 401 until the flat directions of the two pins 100 are corrected and aligned. At the same time, the two pins 100 are locked. Figure 10 As shown; Step B2: The pressing head gradually moves downwards, pressing the two pins 100 into the pin holes of the chain plate 200; during the pressing process of the pins 100, the floating support plate 7 also compresses the floating spring 8 and moves downwards under pressure until the two pins 100 are pressed in. Step C: Pressing is completed. The lower press head moves upward. After the unlocking movable plate 601 loses its downward pressure, it is pushed upward by the unlocking spring 602. At the same time, the inclined surface 603 pushes the roller 505 and the correction plate 502 to move to the right, so that the correction parts 5021 on both sides of the correction plate 502 gradually move away from the flat parts of the two pins 100. Step D: After unlocking, the floating pallet 7 moves upward under the action of the floating spring 8, thereby pushing out the pressed chain plate 200 and pin 100.

[0034] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A tooling for pressing flat pins and chain plates in chain production, characterized in that, The tooling frame consists of a base plate (1), a front plate (2), a rear plate (3), and an upper plate (4); The upper plate (4) is located above a pressing station, where two pins (100) and a chain plate (200) are placed for pressing. A correction and locking mechanism (5) is provided on the right side of the tooling frame. It contacts the flat part of the two pins (100) and can correct the flat direction of the two pins (100) to be consistent, while locking the two pins (100). An unlocking mechanism (6) is provided on the left side of the tooling frame. It is linked with the correction locking mechanism (5), so that the correction locking mechanism (5) can automatically lock or unlock the two pins (100) under the linkage action of the unlocking mechanism (6). The correction locking mechanism (5) includes a pressure plate (501) and a correction plate (502) fixedly connected to the pressure plate (501); the correction plate (502) is provided with correction parts (5021) on both sides, and the two correction parts (5021) correspond to the flat positions of the two pins (100) respectively; A locking spring (503) is provided on one side of the pressure plate (501), and the other end of the locking spring (503) abuts against the front plate (2). Under the elastic force of the locking spring (503), the correction plate (502) is pushed to correct and lock the flat direction of the two pins (100). A sliding cylinder (504) is provided on the side of the pressure plate (501) away from the locking spring (503). The sliding cylinder (504) is slidably connected to the upper plate (4), so that the correction locking mechanism (5) can slide left and right along the sliding cylinder (504).

2. The flat pin and chain plate pressing fixture for chain production as described in claim 1, characterized in that, The unlocking mechanism (6) includes an unlocking movable plate (601) and an unlocking spring (602); the unlocking movable plate (601) is slidably installed in the rear plate (3), and the unlocking spring (602) is located between the bottom end of the unlocking movable plate (601) and the bottom plate (1), and the unlocking movable plate (601) is pushed up and down by the action of the unlocking spring (602).

3. The flat pin and chain plate pressing fixture for chain production as described in claim 2, characterized in that, The top of the unlocking movable plate (601) protrudes from the upper plate (4) and, under the action of the external press, overcomes the elastic force of the unlocking spring (602) and presses the unlocking movable plate (601) down.

4. The flat pin and chain plate pressing fixture for chain production as described in claim 2, characterized in that, The correction plate (502) is also provided with a roller (505), which corresponds to the inclined surface (603) of the unlocking movable plate (601). When the unlocking movable plate (601) moves up and down, the roller (505) rolls on the inclined surface (603), causing the correction locking mechanism (5) to move left and right.

5. The flat pin and chain plate pressing fixture for chain production as described in claim 4, characterized in that, The spring force of the unlocking spring (602) is greater than that of the locking spring (503).

6. The flat pin and chain plate pressing fixture for chain production as described in claim 1, characterized in that, Two V-grooves (401) are provided on the side of the upper plate (4) that contacts the pin (100), corresponding to the two pins (100) respectively; under the action of the correction plate (502), the pins (100) are pushed to rotate around the axis in the V-grooves (401) until the flatness direction of the two pins (100) is corrected to be consistent.

7. The flat pin and chain plate pressing fixture for chain production as described in claim 1, characterized in that, A floating support plate (7) is provided in the tooling frame to support the bottom end of the pin (100), and floating springs (8) are symmetrically provided on both sides of the floating support plate (7). Under the action of the floating springs (8), the floating springs (8) move with the pressing of the pin (100).

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