A chain pin fitting force detection device

Abstract

The present invention belongs to the technical field of chain detection equipment, and specifically relates to a chain pin shaft fitting force detection device. The present invention includes: a detection platform assembly including a detection platform and a lifting assembly, the lifting assembly is arranged on the lower table, and the top of the lifting assembly extends out of the upper table, and the detection platform is arranged on the top of the lifting assembly; the detection mold base is arranged on the upper surface of the detection platform; the force measuring assembly includes a force sensor and a thimble, the force sensor is arranged directly above the detection platform, the thimble is arranged on the contact of the force sensor, and the lower end of the thimble faces the detection platform; the control console is arranged on the upper table, and the control console is also provided with a detection header, which is electrically connected to the force sensor. The present invention is used to solve the technical problem that the fitting force of the pin and the outer chain plate of the parts produced by different batches of raw materials under molds with inconsistent wear degrees after the heat treatment process is inconsistent during mass production mode, but it is difficult to detect the size of the fitting force and the consistency of the chain product cannot be guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of chain detection equipment, and particularly relates to a chain pin shaft fitting force detection device. Background Art

[0002] Chain is a widely used transmission accessory. The quality of the chain directly affects the reliability of the transmission equipment. The chain is mainly composed of outer link plates, inner link plates, pins, rollers and clamps. These parts are produced in large quantities, and the produced parts meet the corresponding part technical requirements. Among them, the pins and the outer link plates need to be fixedly connected by interference fit. However, due to the different batches of raw materials for these parts, the stability of the heat treatment process and the wear of the stamping die, it is difficult to keep the fitting force of the pins in the circular holes of the outer link plates within the set range, and there is no existing detection equipment suitable for detecting the fitting force of the pins and the outer link plates; therefore, those skilled in the art urgently need a device that can detect the fitting force of the pins and the outer link plates. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a chain pin shaft fitting force detection device, which is used to solve the technical problem that in the existing mass production mode, the fitting force between the pin shaft and the outer chain plate of parts produced by different batches of raw materials under molds with inconsistent wear degrees is inconsistent after the heat treatment process, but it is difficult to detect the size of the fitting force, and the consistency of the chain product cannot be guaranteed.

[0004] The present invention solves the above-mentioned technical problem with the following technical solution: A chain pin fitting force detection device comprising:

[0005] A frame, comprising an upper table and a lower table;

[0006] An inspection platform assembly, the inspection platform assembly comprising an inspection platform and a lifting assembly, the lifting assembly being disposed on the lower table, with the top end of the lifting assembly extending out of the upper table, the inspection platform being disposed at the top end of the lifting assembly, and the lifting assembly being used to lift the inspection platform;

[0007] A detection die base, the detection die base is arranged on the upper surface of the detection platform, and the detection die base is used to accommodate the outer chain plate and the pin shaft of the chain;

[0008] A force measuring assembly, the force measuring assembly comprising a force sensor and an ejector pin, the force sensor being disposed directly above the detection platform, the ejector pin being disposed on a contact of the force sensor, the lower end of the ejector pin facing the detection platform, and the lower end of the ejector pin being used to abut against the upper end surface of the pin shaft;

[0009] A control console is provided on the upper table and is used to control the lifting assembly. The control console is also provided with a detection meter, and the detection meter is electrically connected to the force sensor.

[0010] The present invention places the outer link plate with the engaged pin on the detection die base, uses the lifting assembly to lift the detection die base, approaches and presses against the force measuring assembly, and continues to lift it upward. The force sensor is subjected to the force feedback from the ejector pin until the pin is ejected from the outer link plate. The detection header connected to the force sensor has a peak hold function, which can retain the maximum ejection force (i.e., the engaging force between the pin and the outer link plate) at the moment the pin is disengaged from the outer link plate.

[0011] Furthermore: the lifting assembly includes:

[0012] A driving motor, wherein the driving motor is arranged on the lower table;

[0013] a worm gear screw jack, the worm gear screw jack being vertically connected to the drive motor;

[0014] A lifting seat is connected to the upper end of the nut of the worm gear screw lift and extends out of the upper table.

[0015] The beneficial effect of adopting this step is: the driving motor drives the worm screw elevator to drive the lifting seat to move up and down, which can ensure that the lifting seat can rise or fall at a uniform and stable speed under low speed. In particular, the screw structure has a certain rigidity, and the ejector pin will not shift after contacting the pin, which will not affect the accuracy of the measurement.

[0016] Furthermore: a vertical fixing groove is provided on the side of the worm gear screw elevator, and limit switches are provided at the upper and lower ends of the fixing groove;

[0017] A connecting block is provided on the bottom surface of the nut of the worm gear screw lift, and the end of the connecting block extends into the fixing groove, and the end of the connecting block is used to touch the limit switch.

[0018] The beneficial effect of adopting this step is: the limit switch plays an auxiliary role in limiting the movement range of the nut on the screw, preventing the nut from moving beyond the range and causing internal collision of the device in this application, thereby ensuring the safe operation of this device.

[0019] Furthermore: a groove is provided on the upper surface of the detection mold base, and the depth and contour of the groove are adapted to the outer chain piece;

[0020] Two through holes are further provided on the bottom surface of the groove at positions corresponding to the circular holes on the outer link plate. The diameter of the through holes is larger than the diameter of the pin shaft and smaller than the diameter of the groove.

[0021] The beneficial effect of this step is that the groove can limit the position of the outer chain piece on the detection die base, preventing the outer chain piece from lateral deviation when subjected to extrusion force, flying out of the detection die base, and hitting the operator or other equipment, thus eliminating safety hazards;

[0022] The through hole is used to discharge the ejected pin to avoid interference between the pin and the detection mold base.

[0023] Furthermore: the bottom surface of the detection mold base is also provided with a switch type magnetic base.

[0024] The beneficial effects of adopting this step are as follows: Since the types and specifications of chains are diverse, different chains require different detection mold bases. Therefore, a switch-type magnetic base is set on the bottom surface of the detection mold base to facilitate the disassembly and assembly of the detection mold base on the detection platform and improve the efficiency of replacing the detection mold base. In addition, the switch-type magnetic base is also very convenient when adjusting the alignment position of the detection mold base and the top needle. It can be loosened or fixed by pushing and pulling, which also saves adjustment time.

[0025] Furthermore, the ejector pin includes a fixing rod and a needle rod, and the connection between the needle rod and the fixing rod is an arc transition.

[0026] The beneficial effect of this step is that the arc transition joint is to reduce the residual stress during the processing and prevent the needle rod from breaking when it is subjected to the instantaneous impact of the pin shaft.

[0027] The beneficial effects of the present invention are:

[0028] 1. This device can detect the engagement force between the pin and the outer chain, and can detect the differences between different finished chains, ensuring the consistency of chain performance without being affected by adverse factors such as different batches of raw materials, the stability of the heat treatment process, and the wear of the stamping die;

[0029] 2. The detection device in this application has a simple and reliable structure, is easy to operate, and can accurately detect the fitting force between the pin shaft and the outer link plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A three-dimensional diagram of a chain pin fitting force detection device provided by the present invention;

[0032] Figure 2A schematic structural diagram of a chain pin engagement force detection device provided by the present invention;

[0033] Figure 3 This is a left side view of a chain pin engagement force detection device provided by the present invention;

[0034] Figure 4 This is a right side view of a chain pin engagement force detection device provided by the present invention;

[0035] Figure 5 This is a partial enlarged view of the force measuring component in the chain pin engagement force detection device provided by the present invention.

[0036] Reference numerals:

[0037] 1-frame; 11-upper table; 12-lower table; 21-detection platform; 221-drive motor; 222-worm gear screw lift; 223-lifting seat; 3-detection mold base; 31-switchable magnetic seat; 4-force sensor; 41-thimble; 5-control console; 51-detection header; 6-fixing slot; 7-limit switch; 8-connecting block. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0039] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0040] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to 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, and do not indicate or imply 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.

[0041] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0042] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0043] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0044] Example

[0045] like Figures 1 to 5 As shown, the present invention provides a chain pin engagement force detection device, comprising:

[0046] The frame 1 includes an upper table 11 and a lower table 12. The frame 1 is used to place the detection platform assembly and the force measurement assembly. To ensure the levelness of the frame 1, height-adjustable rubber pads are set on the four feet of the frame 1;

[0047] An inspection platform assembly, comprising an inspection platform 21 and a lifting assembly, wherein the lifting assembly is disposed on the lower table 12, and the top end of the lifting assembly extends out of the upper table 11, the inspection platform 21 is disposed on the top end of the lifting assembly, and the lifting assembly is used to lift the inspection platform 21;

[0048] A detection die base 3, which is provided on the upper surface of the detection platform 21 and is used to accommodate the outer chain link and the pin of the chain;

[0049] A force measuring assembly, comprising a force sensor 4 and an ejector pin 41. The force sensor 4 is disposed directly above the detection platform 21. The ejector pin 41 is disposed on a contact of the force sensor 4. The lower end of the ejector pin 41 faces the detection platform 21. The lower end of the ejector pin 41 is configured to abut against the upper end surface of the pin shaft.

[0050] The console 5 is provided on the upper table 11 . The console 5 is used to control the lifting assembly. The console 5 is further provided with a detection meter 51 . The detection meter 51 is electrically connected to the force sensor 4 .

[0051] The present invention places the outer link with the engaged pin on the detection die base 3, and uses the lifting assembly to lift the detection die base 3, close to and against the force measuring assembly, and continues to lift it upward. The force sensor 4 is subjected to the force feedback from the ejector pin 41 until the pin is ejected from the outer link. The detection header 51 connected to the force sensor 4 has a peak hold function, which can retain the maximum ejection force (i.e., the engaging force between the pin and the outer link) at the moment the pin is disengaged from the outer link.

[0052] Wherein, the lifting assembly includes:

[0053] A driving motor 221, wherein the driving motor 221 is provided on the lower table 12;

[0054] A worm gear screw elevator 222 , the worm gear screw elevator 222 being vertically connected to the drive motor 221 ;

[0055] The lifting seat 223 is connected to the upper end of the nut of the worm gear screw lift 222 and extends out of the upper table 11.

[0056] The driving motor 221 drives the worm screw elevator 222 to drive the lifting seat 223 to move up and down, which can ensure that the lifting seat 223 can rise or fall at a uniform and stable speed under low speed conditions. In particular, the screw structure has a certain rigidity. After the ejector pin 41 contacts the pin shaft and is subjected to force, the lifting seat 223 will not be displaced up and down, and the measurement accuracy will not be affected.

[0057] A vertical fixing groove 6 is provided on the side of the worm gear screw lift 222, and a limit switch 7 is provided at the upper and lower ends of the fixing groove 6;

[0058] A connecting block 8 is provided on the bottom surface of the nut of the worm gear screw lift 222 , and the end of the connecting block 8 extends into the fixing groove 6 , and the end of the connecting block 8 is used to touch the limit switch 7 .

[0059] The limit switch 7 serves to assist in limiting the range of movement of the nut on the lead screw, thereby preventing the nut from moving beyond the range and causing an internal collision in the device of the present application, thereby ensuring the safe operation of the device.

[0060] The upper surface of the detection mold base 3 is provided with a groove, the depth and profile of the groove are adapted to the outer chain piece;

[0061] Two through holes are further provided on the bottom surface of the groove at positions corresponding to the circular holes on the outer link plate. The diameter of the through holes is larger than the diameter of the pin shaft and smaller than the diameter of the groove.

[0062] The groove can limit the position of the outer chain piece on the detection die base 3, preventing the outer chain piece from lateral deviation when subjected to the extrusion force, flying out of the detection die base 3, and hitting the operator or other equipment, thereby eliminating safety hazards;

[0063] The through hole is used to discharge the ejected pin to avoid interference between the pin and the detection mold base 3.

[0064] The bottom surface of the detection mold base 3 is further provided with a switch-type magnetic base 31 .

[0065] Since chains come in various types and specifications, different chains require different detection mold bases 3. Therefore, a switch-type magnetic base 31 is provided on the bottom surface of the detection mold base 3 to facilitate the disassembly and assembly of the detection mold base 3 on the detection platform 21 and improve the efficiency of replacing the detection mold base 3. In addition, the switch-type magnetic base 31 is also very convenient for adjusting the alignment position of the detection mold base 3 and the ejector pin 41. It can be loosened or fixed by pushing and pulling, which also saves adjustment time.

[0066] The ejector pin 41 includes a fixing rod and a needle rod, and the connection between the needle rod and the fixing rod is an arc transition.

[0067] The arc transition connection is to reduce the residual stress during the processing and prevent the needle rod from breaking when it is subjected to the instantaneous impact of the pin shaft.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chain pin fitting force detection device, characterized in that: include: A frame, comprising an upper table and a lower table; An inspection platform assembly, the inspection platform assembly comprising an inspection platform and a lifting assembly, the lifting assembly being disposed on the lower table, with the top end of the lifting assembly extending out of the upper table, the inspection platform being disposed at the top end of the lifting assembly, and the lifting assembly being used to lift the inspection platform; A detection die base, the detection die base is arranged on the upper surface of the detection platform, and the detection die base is used to accommodate the outer chain piece that has been engaged with the pin shaft; A force measuring assembly, the force measuring assembly comprising a force sensor and an ejector pin, the force sensor being disposed directly above the detection platform, the ejector pin being disposed on a contact of the force sensor, the lower end of the ejector pin facing the detection platform, and the lower end of the ejector pin being used to abut against the upper end surface of the pin shaft; A control console is provided on the upper table, and is used to control the lifting assembly. The control console is further provided with a detection meter, and the detection meter is electrically connected to the force sensor, and the detection meter has a peak hold function; A groove is provided on the upper surface of the detection mold base, and the depth and profile of the groove are adapted to the outer chain piece; Two through holes are further provided on the bottom surface of the groove at positions corresponding to the circular holes on the outer link plate, wherein the diameter of the through holes is larger than the diameter of the pin shaft and smaller than the diameter of the groove; The bottom surface of the detection mold base is also provided with a switch type magnetic base.

2. A chain pin fitting force detection device according to claim 1, characterized in that: The lifting assembly comprises: A driving motor, wherein the driving motor is arranged on the lower table; a worm gear screw jack, the worm gear screw jack being vertically connected to the drive motor; A lifting seat is connected to the upper end of the nut of the worm gear screw lift and extends out of the upper table.

3. A chain pin fitting force detection device according to claim 2, characterized in that: A vertical fixing groove is provided on the side of the worm gear screw elevator, and limit switches are provided at the upper and lower ends of the fixing groove; A connecting block is provided on the bottom surface of the nut of the worm gear screw lift, and the end of the connecting block extends into the fixing groove, and the end of the connecting block is used to touch the limit switch.

4. A chain pin fitting force detection device according to claim 1, characterized in that: The ejector pin comprises a fixing rod and a needle rod, and the connection between the needle rod and the fixing rod is an arc transition.

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