Flat-position pin shaft and chain plate press-fitting tool and using method

Abstract

The invention discloses a flat-position pin shaft and chain plate press-fitting tool and a using method, a press-fitting station is arranged at the top of a tool frame, and two pin shafts and a chain plate are placed on the press-fitting station for press-fitting; a movable plate is arranged in the tool frame and used for supporting the flat end of the pin shaft, and the movable plate is installed on the kinematic pair and moves along with press fitting of the pin shaft. A locking mechanism is arranged on the movable plate, and the flat parts of the pin shafts are limited through the locking mechanism, so that the flat directions of the two pin shafts are consistent. The locking mechanism arranged on the press-fitting tool for the flat pin shaft and the chain plate synchronously moves downwards along the kinematic pair along with the press-fitting action of the pin shaft, and the locking mechanism and the pin shaft do not rub each other, so that the service life of parts in the press-fitting tool is prolonged; the flat pressing block pushed by the push-pull type quick clamp is in clearance fit with the flat part of the pin shaft, so that operation is not needed under the condition that the chain plate is not deformed and is clamped with the tool; and when the chain plate deforms and is clamped with the tool, the assembled component can be conveniently taken out by opening the push-pull type quick clamp.

Description

Technical Field

[0001] The invention relates to the technical field of conveyor chain assembly, and in particular to a press-fitting tool for a flat pin shaft and a chain plate and a use method thereof. Background Art

[0002] Chain transmission is an important form of mechanical transmission. The transmission chain generally adopts a bushing roller chain, which is composed of inner link plates, outer link plates, bushings and rollers.

[0003] Among them, the pin shaft and the chain plate are interference fitted; in the assembly process, if Figure 1 As shown, two pins 100 are usually inserted into the mounting holes at both ends of the chain plate 200, and then the operator needs to use a hammer to knock the two pins 100 in turn so that the two pins 100 and the chain plate 200 have an interference fit, as shown in FIG. Figure 2 shown.

[0004] For the pin shaft 100 with a flattened design, the traditional assembly method is to use a hammer to knock. During multiple knocks, the pin shaft 100 will rotate in the mounting hole of the chain plate 200, resulting in inconsistent flattening directions of the two pin shafts 100, affecting subsequent further assembly.

[0005] Although there are some auxiliary tooling for assembly at present, the following problems still exist during the assembly process: first, the flattening direction of the pin shaft 100 cannot be restricted, resulting in the problem that the flattening directions of the two pin shafts 100 are inconsistent after assembly; second, due to the processing error of the pin shaft 100 and the chain plate 200, the pin shaft 100 will present an outward eight-shaped shape after being installed in the chain plate 200 (such as Figure 3 as shown) or inward-facing (as shown Figure 4 This will not only affect the difficulty of subsequent assembly, but also cause the assembled components to be 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 the present invention is to provide a press-fitting tool for a flat pin shaft and a chain plate and a method for using the press-fitting tool, so as to solve the defects of the existing press-fitting tool for a flat pin shaft and a chain plate.

[0007] In order to solve the above technical problems, the present invention provides a press-fitting tool for a flat pin shaft and a chain plate, comprising a tool frame composed of a bottom plate and a U-shaped frame; The top of the tooling frame is a press-fitting station, where two pins and chain plates are placed for press-fitting; A movable plate is provided inside the tooling frame to support the flat end of the pin shaft, and the movable plate is mounted on the kinematic pair and moves with the press-fitting of the pin shaft; The movable plate is provided with a locking mechanism, which limits the flattened portion of the pin shaft so that the flattened directions of the two pin shafts are consistent.

[0008] Preferably, a replacement plate is detachably mounted on the press-fitting station on the top of the tooling frame, and a contoured hole is provided on the replacement plate for positioning the chain plate; and by replacing different types of replacement plates, various types of chain plates can be adapted.

[0009] Preferably, two pin holes are provided on the replacement plate, the U-shaped frame and the movable plate along the same axis for two pins to be inserted respectively.

[0010] Preferably, a support plate is detachably mounted on the back of the movable plate at the pin shaft hole, and the support plate blocks part of the pin shaft hole to support the flat end of the pin shaft; and by replacing different types of support plates, various types of pin shafts can be adapted.

[0011] Preferably, the kinematic pair comprises a support column, a linear bearing and a spring; the support column is arranged inside the tooling frame, one end of which is fixedly connected to the U-shaped frame by bolts, and the other end of which is fixedly connected to the bottom plate by bolts; The linear bearing sleeve is installed on the support column, and the spring is installed between the linear bearing and the base plate, so that the linear bearing floats and slides on the support column.

[0012] Preferably, the kinematic pairs are provided with two groups, symmetrically arranged on both sides of the movable plate, and connected to the movable plate through the linear bearings; A buffer pad is also provided between the movable plate and the U-shaped frame.

[0013] Preferably, the locking mechanism includes a flat pressure block, a push-pull quick clamp and a slide rail assembly; the push-pull quick clamp and the slide rail assembly are arranged on the back side of the movable plate, and under the action of the push-pull quick clamp, the flat pressure block slides along the slide rail assembly, contacts and presses the flat portion of the pin shaft.

[0014] Preferably, the slide rail assembly includes a slide rail arranged on the back of the movable plate and a slider sliding along the slide rail; and the slider, the flat pressure block and the extended shaft of the push-pull quick clamp are connected by a connecting plate. Under the action of the push-pull quick clamp, the connecting plate pushes the flat pressure block to slide along the slide rail, contact and press the flat portion of the pin shaft.

[0015] Preferably, the flattening pressure blocks are provided in two groups and are symmetrically arranged on both sides of the connecting plate; the two groups of flattening pressure blocks slide synchronously under the push of the connecting plate, contact and press the flattening parts of the two pin shafts, so that the flattening directions of the two pin shafts are consistent.

[0016] The present invention also provides a method for using a press-fitting tool for a flat pin shaft and a chain plate, comprising the following steps: Step A: First, replace the corresponding replacement plate and support plate according to the model of the pin shaft and chain plate; Step B: Then place the chain plate on the replacement plate on the top of the tooling frame, adjust the two pins to the flat position, and insert them along the pin holes of the replacement plate, U-shaped frame and movable plate; Step C: Then manually operate the push-pull quick clamp, and use the connecting plate to push the two sets of flat-position pressing blocks to contact and press the flat-position parts of the two pins, so that the flat-position directions of the two pins are always consistent; Step D: Then, the pin shaft is pressed down under the action of the punch, and the pin shaft is pressed into the mounting hole of the chain plate under the action of pressure; Step E: During the pressing process, the movable plate and the locking mechanism move downward along the kinematic pair; during this process, the locking mechanism is always in a locked state to ensure that the flattening directions of the two pins remain consistent; Step F: After the press-fitting is completed, the punch press moves upward, and the spring in the kinematic pair pushes the linear bearing, the movable plate, and the assembly of the pin shaft and the chain plate above to move upward and away from the replacement plate; Step G: Take out the pin shaft and chain plate assembly to complete the press fitting.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The press-fitting tooling of the flat pin shaft and the chain plate is equipped with a locking mechanism, and the locking mechanism moves downward synchronously along the kinematic pair with the press-fitting action of the pin shaft, and there is no mutual friction between the two, thereby extending the service life of the parts in the press-fitting tooling; 2. The locking mechanism of the press-fitting tooling of the flat pin shaft and the chain plate is mainly a push-pull type quick clamp. The flat pressure block pushed by it is matched with the flat part of the pin shaft. When the chain plate is not deformed and the tooling is not stuck, the push-pull type quick clamp does not need to be operated; when the chain plate is deformed and the tooling is stuck, the push-pull type quick clamp can be opened to facilitate the removal of the assembled components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the assembly of two pins and a chain plate provided by the present invention; Figure 2 It is a schematic diagram of the structure after the two pins and the chain plate provided by the present invention are pressed together; Figure 3 It is a schematic diagram of the outward-facing toe-shaped assembly provided by the present invention; Figure 4 It is a schematic diagram of the inner-toe-shaped assembly provided by the present invention; Figure 5It is a structural schematic diagram of a press-fitting tool for a flat pin shaft and a chain plate provided by the present invention; Figure 6 It is a cross-sectional view of a press-fitting tool for a flat pin shaft and a chain plate provided by the present invention; Figure 7 is a top view of the locking mechanism provided by the present invention; Figure 8 is a cross-sectional view of the locking mechanism provided by the present invention; Fig. 9 It is a schematic diagram of the press-fitting tooling of the flat pin shaft and the chain plate provided by the present invention before press-fitting; Fig.10 It is a schematic diagram of the press-fitting tooling of the flat pin shaft and the chain plate provided by the present invention; Fig.11 It is a schematic diagram of the press-fitting tooling of the flat pin shaft and the chain plate provided by the present invention after press-fitting.

[0019] In the figure: 100, pin; 200, chain plate; 1, tooling frame; 101, bottom plate; 102, U-shaped frame; 2, movable plate; 3, kinematic pair; 4, locking mechanism; 5, replacement plate; 6, pin hole; 7, support plate; 8, buffer pad; 301, support column; 302, linear bearing; 303, spring; 401, flat block; 402, push-pull quick clamp; 403, slide rail assembly; 404, connecting plate; 4021, extension shaft; 4031, slide rail; 4032, slider. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] In addition, the features, operations, and characteristics described in the specification can be combined in any appropriate manner to form various embodiments. Similarly, the steps or actions described in the method can also be adjusted in order in a manner that can be easily seen by those skilled in the art. Therefore, the various sequences in the specification and drawings are only for the purpose of describing a certain embodiment, and are not necessarily such sequences, unless otherwise stated that a certain sequence must be followed.

[0024] Embodiment 1 The present invention provides a press-fitting tool for a flat pin shaft and a chain plate, please refer to Figure 5 and Figure 6 , including a tooling frame 1 composed of a bottom plate 101 and a U-shaped frame 102; the top of the tooling frame 1 is a press-fitting station, on which two pins 100 and a chain plate 200 are placed for press-fitting; a movable plate 2 is provided inside the tooling frame 1 to support the flat end of the pin 100, and the movable plate 2 is installed on the kinematic pair 3 and moves with the press-fitting of the pin 100; a locking mechanism 4 is provided on the movable plate 2, and the flat part of the pin 100 is limited by the locking mechanism 4 so that the flat directions of the two pins 100 are consistent.

[0025] Specifically, a replacement plate 5 is detachably mounted on the press-fitting station on the top of the tooling frame 1 , and a contoured hole is provided on the replacement plate 5 for positioning and placing the chain plate 200 ; and by replacing different types of replacement plates 5 , various types of chain plates 200 can be adapted.

[0026] Furthermore, two pin holes 6 are provided on the replacement plate 5 , the U-shaped frame 102 and the movable plate 2 along the same axis for two pins 100 to be inserted into respectively.

[0027] For details, please continue to refer to Figure 6 A support plate 7 is detachably mounted on the back of the movable plate 2 at the pin shaft hole 6, and the support plate 7 blocks part of the pin shaft hole 6 to support the flat end of the pin shaft 100; and by replacing different types of support plates 7, various types of pin shafts 100 can be adapted.

[0028] Furthermore, the kinematic pair 3 includes a support column 301, a linear bearing 302 and a spring 303; the support column 301 is arranged inside the tooling frame 1, one end of which is fixedly connected to the U-shaped frame 102 by bolts, and the other end is fixedly connected to the base plate 101 by bolts; the linear bearing 302 is sleeved and installed on the support column 301, and the spring 303 is installed between the linear bearing 302 and the base plate 101, so that the linear bearing 302 floats and slides on the support column 301.

[0029] In one embodiment, the kinematic pairs 3 are provided with two groups, symmetrically arranged on both sides of the movable plate 2, and connected to the movable plate 2 through the linear bearings 302; a buffer pad 8 is also provided between the movable plate 2 and the U-shaped frame 102, and the purpose of providing the buffer pad 8 is to avoid collision between the movable plate 2 and the U-shaped frame 102.

[0030] Specifically, Figure 7 and Figure 8 As shown, the locking mechanism 4 includes a flat pressing block 401, a push-pull quick clamp 402 and a slide rail assembly 403; the push-pull quick clamp 402 and the slide rail assembly 403 are arranged on the back of the movable plate 2. Under the action of the push-pull quick clamp 402, the flat pressing block 401 slides along the slide rail assembly 403 to contact and press the flat portion of the pin shaft 100.

[0031] Furthermore, the slide rail assembly 403 includes a slide rail 4031 arranged on the back of the movable plate 2 and a slider 4032 sliding along the slide rail 4031; and the slider 4032, the flat pressure block 401 and the extended shaft 4021 of the push-pull quick clamp 402 are connected by a connecting plate 404. Under the action of the push-pull quick clamp 402, the connecting plate 404 pushes the flat pressure block 401 to slide along the slide rail 4031, contacting and pressing the flat portion of the pin shaft 100.

[0032] In one embodiment, the flattening pressure blocks 401 are provided in two groups and are symmetrically arranged on both sides of the connecting plate 404; the two groups of the flattening pressure blocks 401 slide synchronously under the push of the connecting plate 404, contact and press the flattened parts of the two pin shafts 100, so that the flattening directions of the two pin shafts 100 are consistent.

[0033] Embodiment 2 The present invention also provides a method for using the press-fitting tooling for the flat pin shaft and the chain plate, please refer to Figure 9-11 , including the following steps: Step A: Fig. 9 As shown, firstly, replace the corresponding replacement plate 5 and the support plate 7 according to the models of the pin shaft 100 and the chain plate 200; Step B: Then place the chain plate 200 on the replacement plate 5 on the top of the tooling frame 1, adjust the two pins 100 to the flat position, and insert them along the replacement plate 5, the U-shaped frame 102 and the pin holes 6 of the movable plate 2; Step C: Then manually operate the push-pull quick clamp 402, and push the two sets of flattening pressing blocks 401 through the connecting plate 404 to contact and press the flattened parts of the two pins 100, so that the flattening directions of the two pins 100 are always consistent; Step D: Fig.10 As shown, the pin shaft 100 is then pressed down by the punch press, and the pin shaft 100 is pressed into the mounting hole of the chain plate 200 under the pressure. Step E: During the pressing process, the movable plate 2 and the locking mechanism 4 move downward along the kinematic pair 3; during this process, the locking mechanism 4 is always in a locked state to ensure that the flattening directions of the two pins 100 remain consistent; Step F: Fig.11 As shown, after the press-fitting is completed, the punch press moves upward, and at this time the spring 303 in the kinematic pair 3 pushes the linear bearing 302, the movable plate 2, and the assembly of the pin shaft 100 and the chain plate 200 above to move upward and away from the replacement plate 5; Step G: Take out the assembly of the pin shaft 100 and the chain plate 200 to complete a press-fit.

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

Claims

1. A press-fitting tool for a flat pin shaft and a chain plate, characterized in that: A tooling frame (1) comprising a bottom plate (101) and a U-shaped frame (102); The top of the tooling frame (1) is a press-fitting station, on which two pins (100) and a chain plate (200) are placed for press-fitting; A movable plate (2) is provided inside the tooling frame (1) for supporting the flat end of the pin shaft (100), and the movable plate (2) is mounted on the kinematic pair (3) and moves with the press-fitting of the pin shaft (100); The movable plate (2) is provided with a locking mechanism (4), and the locking mechanism (4) limits the flattened portion of the pin shaft (100), so that the flattened directions of the two pin shafts (100) are consistent.

2. A press-fitting tool for a flat pin shaft and a chain plate as claimed in claim 1, characterized in that: A replacement plate (5) is detachably mounted on the press-fitting station at the top of the tooling frame (1); the replacement plate (5) is provided with a contoured hole for positioning the chain plate (200); and by replacing different types of replacement plates (5), chain plates (200) of various models can be adapted.

3. A press-fitting tool for a flat pin shaft and a chain plate as claimed in claim 2, characterized in that: Two pin holes (6) are provided on the replacement plate (5), the U-shaped frame (102) and the movable plate (2) along the same axis for respectively inserting two pin holes (100).

4. A press-fitting tool for a flat pin shaft and a chain plate as claimed in claim 1, characterized in that: A support plate (7) is detachably mounted on the back of the movable plate (2) at the pin shaft hole (6), and the support plate (7) blocks part of the pin shaft hole (6) to support the flat end of the pin shaft (100); and different types of support plates (7) can be replaced to adapt to various types of pin shafts (100).

5. A press-fitting tool for a flat pin shaft and a chain plate as claimed in claim 1, characterized in that: The kinematic pair (3) comprises a support column (301), a linear bearing (302) and a spring (303); the support column (301) is arranged inside the tooling frame (1), one end of the support column is fixedly connected to the U-shaped frame (102) by means of bolts, and the other end of the support column is fixedly connected to the bottom plate (101) by means of bolts; The linear bearing (302) is sleeved and installed on the support column (301), and the spring (303) is installed between the linear bearing (302) and the base plate (101), so that the linear bearing (302) floats and slides on the support column (301).

6. A press-fitting tool for a flat pin shaft and a chain plate as claimed in claim 5, characterized in that: The kinematic pairs (3) are provided with two groups, which are symmetrically arranged on both sides of the movable plate (2), and are connected to the movable plate (2) via the linear bearings (302); A buffer pad (8) is also provided between the movable plate (2) and the U-shaped frame (102).

7. A press-fitting tool for a flat pin shaft and a chain plate as claimed in claim 1, characterized in that: The locking mechanism (4) comprises a flat pressing block (401), a push-pull quick clamp (402) and a slide rail assembly (403); the push-pull quick clamp (402) and the slide rail assembly (403) are arranged on the back of the movable plate (2); under the action of the push-pull quick clamp (402), the flat pressing block (401) slides along the slide rail assembly (403) to contact and press the flat portion of the pin shaft (100).

8. A press-fitting tool for a flat pin shaft and a chain plate as claimed in claim 7, characterized in that: The slide rail assembly (403) comprises a slide rail (4031) arranged on the back of the movable plate (2) and a slider (4032) sliding along the slide rail (4031); the slider (4032), the flat-position pressing block (401) and the extended shaft (4021) of the push-pull quick clamp (402) are connected via a connecting plate (404); under the action of the push-pull quick clamp (402), the connecting plate (404) pushes the flat-position pressing block (401) to slide along the slide rail (4031), contacting and pressing the flat-position part of the pin shaft (100).

9. A press-fitting tool for a flat pin shaft and a chain plate as claimed in claim 8, characterized in that: The flattening pressing blocks (401) are provided in two groups and are symmetrically arranged on both sides of the connecting plate (404); the two groups of flattening pressing blocks (401) slide synchronously under the push of the connecting plate (404), contact and press the flattened portions of the two pin shafts (100), so that the flattening directions of the two pin shafts (100) are consistent.

10. A method for using the press fitting tool according to any one of claims 1 to 9, characterized in that: The steps include: Step A: First, replace the corresponding replacement plate (5) and the support plate (7) according to the models of the pin shaft (100) and the chain plate (200); Step B: Then, the chain plate (200) is placed on the replacement plate (5) on the top of the tooling frame (1), and the two pins (100) are adjusted to the flat position and inserted along the replacement plate (5), the U-shaped frame (102) and the pin holes (6) of the movable plate (2); Step C: Then manually operate the push-pull quick clamp (402), and use the connecting plate (404) to push the two sets of flattening pressing blocks (401) to contact and press the flattened parts of the two pins (100), so that the flattening directions of the two pins (100) are always consistent; Step D: Then, the pin shaft (100) is pressed downward by the punch press, and the pin shaft (100) is pressed into the mounting hole of the chain plate (200) under the action of pressure; Step E: During the pressing process, the movable plate (2) and the locking mechanism (4) move downward along the kinematic pair (3); during this process, the locking mechanism (4) is always in a locked state to ensure that the flattening directions of the two pins (100) remain consistent; Step F: After the press-fitting is completed, the punch press moves upward, and the spring (303) in the kinematic pair (3) pushes the linear bearing (302), the movable plate (2), and the assembly of the upper pin (100) and the chain plate (200) to move upward and away from the replacement plate (5); Step G: Take out the assembly of the pin shaft (100) and the chain plate (200) to complete the first press-fitting.

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