A precisely positioned crimping device for elastic coupling and a method of using the same

Abstract

The present invention provides a precisely positioned crimping device for an elastic coupling and a method of using the same, which at least comprises a joint plate, a joint head block and a pressing pin shaft; a step countersunk hole with a convex interface is provided on the bottom surface of the joint plate, and two first pressing pin holes and two first positioning holes are provided on the top surface of the joint plate; a concave step through hole and two positioning pins that can be inserted into the first positioning holes are provided on the joint head block; there are two pressing pin shafts, which are respectively inserted into a first pressing pin hole and abut against the top of a connecting pin placed in the step countersunk hole. The present invention is easy to operate, and the elastic displacement of the coupling is guaranteed by the crimping device, which reduces the influence of human factors on product quality, while improving the qualified rate of pin assembly, and enhancing the reliability and usability of subsequent product actual flight tests.

Description

Technical Field

[0001] The invention belongs to the technical field of coupling transfer, and in particular relates to a precisely positioned crimping device for an elastic coupling and a use method thereof. Background Art

[0002] The coupling is a mechanical part used to connect two shafts (driving shaft and driven shaft) in different mechanisms so that they rotate together and transmit torque. It plays a connecting role. The elastic coupling is an integrally formed metal elastic body. The elastic action compensates for radial, angular and axial deviations. The main fixing methods are screwing and clamping. For enterprises with small product production volumes, the positioning and elastic displacement of the coupling pin are mainly completed by manual labor and auxiliary tools. Manual operation has problems such as low efficiency, poor consistency, and unqualified indicators.

[0003] The servo is the actuator of the control system, which mainly responds to the steering command of the upper computer. The operation of the motor drives the mechanical structure to rotate and drives the rudder surface to deflect, thereby achieving the purpose of controlling the product's posture. During the actual flight test of a certain type of product, the servo reduction device coupling and the worm gear component were stuck. After investigation, it was found that the elastic displacement of the coupling was out of tolerance, causing a failure in the mechanical engagement part, resulting in the product being unable to transmit the steering torque normally, which directly affected the product test results; the cost of the actual flight test was about 400,000, so product quality is particularly important. The present invention designs a coupling crimping device that can simultaneously meet the positioning and elastic displacement of the elastic pin. Summary of the invention

[0004] The purpose of the present invention is to provide a precisely positioned crimping device for elastic couplings and a method for using the same. The present invention has the characteristics of simple overall structure, flexible and convenient operation, high precision, high efficiency, etc.

[0005] The technical solution of the present invention is:

[0006] A precisely positioned crimping device for an elastic coupling comprises a joint plate, a joint head block and a pressing pin shaft; a step countersunk hole with a convex interface is provided on the bottom surface of the joint plate, and a first pressing pin hole is provided on the top surface of the joint plate at the corresponding positions of two shoulders of the step countersunk hole;

[0007] The node plate is provided with two first positioning holes which are symmetrically arranged and are located at the periphery of the step countersunk hole;

[0008] The step counterbore, the first pressing pin hole and the first positioning hole all extend axially;

[0009] A concave-shaped step through hole is provided on the joint block at a position corresponding to the step countersunk hole, and a positioning pin is provided on the top surface of the joint block at a position corresponding to the first positioning hole for inserting into the first positioning hole;

[0010] There are two pressing pin shafts, and the lower end faces of the pressing pin shafts are arc surfaces, which are used to be inserted into the first pressing pin holes respectively and then extend into the step countersunk hole, thereby abutting against the top end of the connecting pin placed in the step countersunk hole. The connecting pin is coaxially arranged with the first pressing pin hole.

[0011] The cross-sectional shape of the second positioning hole arranged at the top of the aforementioned stepped through hole is composed of a circular arc portion and a square portion.

[0012] A clearance groove is respectively arranged on both sides of the aforementioned arc portion.

[0013] A countersunk through hole communicating with the step through hole is provided on one side of the joint block, so that a screw can be connected and enter the step through hole to realize the fastening and limiting of the joint.

[0014] The precisely positioned elastic coupling crimping device also includes two spiral springs symmetrically arranged in the step through hole and respectively placed on both sides of the joint head, and the connecting line of the two spiral springs is perpendicular to the connecting line of the two pressing pin shafts.

[0015] The aforementioned section plates and section head blocks are made of 2Cr13 stainless steel, and the hardness requirements of the section plates and section head blocks are HRC50~HRC60;

[0016] The parallelism of the mating crimping surfaces of the node block and the node head block is 0.005;

[0017] The surface roughness of the node block and the node head block at the contact points with the parts is 1.6.

[0018] A method for using a crimping device for an elastic coupling comprises the following steps:

[0019] 1) Install the joint into the stepped through hole of the joint block, and screw the screw into the countersunk through hole to press and fix the joint;

[0020] 2) Place coil springs on both sides of the joint;

[0021] 3) Install the section plate into the step countersunk hole of the section plate;

[0022] 4) Slowly insert the positioning pin into the first positioning hole until the node plate contacts and presses on the spiral spring, and at the same time put the two connecting pins into the first pressing pin hole;

[0023] 5) Insert the pressing pin shaft into the first pressing pin hole so that the lower end of the pressing pin shaft touches the top of the connecting pin, and with the help of external force, the connecting pin is pushed downward by the pressing pin shaft so that the connecting pin is connected downward to the shoulder of the joint head, thus completing the assembly of the joint plate and the joint head.

[0024] The aforementioned step 2) also includes a step of bonding the coil spring to the joint before placing the coil spring.

[0025] The aforementioned step 3) further includes the step of applying grease to the contact surface between the segment plate and the segment plate before installing the segment plate into the step countersunk hole of the segment plate.

[0026] The invention has the advantages of simple operation, elastic displacement of the coupling is ensured by the crimping device, the influence of human factors on product quality is reduced, the qualified rate of pin assembly is improved, and the reliability and usability of subsequent product actual flight tests are enhanced.

[0027] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A side view of a crimping device for a precisely positioned elastic coupling.

[0029] Figure 2 yes Figure 1 Top view of the .

[0030] Figure 3 yes Figure 1 FF cross-sectional view.

[0031] Figure 4 yes Figure 2 EE cross-sectional view.

[0032] Figure 5 It is a three-dimensional schematic diagram of the node plate.

[0033] Figure 6 is a bottom view of the section plate.

[0034] Figure 7 This is a top view of the node plate.

[0035] Figure 8 yes Figure 7 AA section view.

[0036] Fig. 9 It is a three-dimensional diagram of the section block.

[0037] Fig.10 It is a top view of the node block.

[0038] Fig.11 yes Fig.10 AA section view.

[0039] Fig.12 yes Fig.10 BB cross-sectional view.

[0040] Fig.13 It is a schematic diagram of the section plate and section head after assembly.

[0041] Fig.14 yes Fig.13 BB cross-sectional view.

[0042] Fig.15 yes Fig.13 CC cross-sectional view.

[0043] Description of reference numerals:

[0044] 1. Section plate, 2. Section head block, 3. Press pin shaft, 4. Step countersunk hole, 5. Shoulder, 6. Press pin hole, 7. First positioning hole, 8. Step through hole, 9. Positioning pin, 10. Connecting pin, 11. Coil spring, 12. Countersunk through hole, 13. Section head, 14. Second positioning hole, 15. Section plate, 16. Make way groove, 17. Shoulder. DETAILED DESCRIPTION

[0045] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0046] The exemplary embodiments of the present invention are now described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0047] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0048] In order to provide an elastic coupling crimping device with a simple overall structure, flexible and convenient operation, high precision and high efficiency, the present invention is described in detail through the following embodiments in conjunction with the accompanying drawings.

[0049] Embodiment 1:

[0050] Figure 1 FIG. 1 is a side view of a precisely positioned elastic coupling crimping device provided in this embodiment. Figure 2 is Figure 1 A top view of Figure 3 is based on Figure 1 FF view, Figure 4 is based on Figure 2 EE view of the .

[0051] It is not difficult to find that the precisely positioned elastic coupling crimping device adopts a split structure, which specifically includes at least Figures 5 to 8 Section 1 shown, Figures 9 to 12 The joint block 2 and the pressing pin shaft 3 are shown. Figure 3 and 4 It can be clearly seen that the structurally matched node plate 15 and node head 13 are respectively placed in the step countersunk hole 4 with a convex cross section on the bottom surface of the node plate 1 and in the step through hole 8 with a concave cross section corresponding to the step countersunk hole 4 of the node head block 2, and through Figure 4 As shown, the pin shaft 3 is inserted into the first pin hole 6 from the top of the joint plate 1, passes through the second pin hole on the joint plate 15, and then the connecting pin 10 is inserted into the connecting hole on the joint head 13, so as to realize the connection between the joint plate 15 and the joint head 13, wherein the lower end face of the pin shaft 3, i.e., the crimping end face, is an arc surface; the first pin hole 6 corresponds to the two shoulders 5 of the step countersunk hole 4.

[0052] And by Figure 3 It can be found that the node plate 1 is provided with two first positioning holes 7 symmetrically arranged and placed on the periphery of the step countersunk hole 4 (the first positioning hole 7 is also placed on the periphery of the first pin hole 6), and the step countersunk hole 4, the first pin hole 6 and the first positioning hole 7 are all extended axially, wherein the first positioning hole 7 matches with the positioning pin 9 on the top surface of the node head block 2, and the positioning pin 9 is inserted into the first positioning hole 7 to achieve the limiting and matching assembly of the node plate 1 and the node head block 2. Before the positioning pin 9 is inserted into the first positioning hole 7, the node 13 is assembled in the step through hole 8 on the node head block 2, and the node 13 is fastened and positioned by a screw screwed in from one side of the node head block 2 through the countersunk threaded through hole 12, and then a coil spring 11 is placed on both sides of the shoulder of the node 13 (see Figure 3 ), and the connecting line of the two coil springs 11 is perpendicular to the connecting line of the two pressing pin shafts 3. After applying glue to the bottom end of the coil spring 11 for bonding and placing the coil spring 11 flat, the node plate 1 can be slowly moved downward, so that the node plate 15 presses the coil spring 11 downward, and at the same time, the connecting pin 10 is inserted downward into the connecting hole on the node head 13 (see Fig.14 ), until the node plate 15 and the node head 13 are assembled.

[0053] Embodiment 2:

[0054] Before pressing, a proper amount of grease may be applied to the side wall of the step counterbore 4 to absorb the segment plate 15 to prevent the segment plate 15 from loosening, shifting, or deflecting during assembly.

[0055] See also Fig.15 It can be seen that the node plate 15 in this embodiment should have the same profile as the stepped counterbore 4 , while the profile of the node head 13 should be the same and matchable with the stepped through hole 8 .

[0056] Depend on Fig. 9 and Fig.10 It can be seen that a second positioning hole 14 is set at the top of the step through hole 8, and the second positioning hole 14 is mainly used to ensure the coaxiality of the node 13 and the step through hole 8. The second positioning hole 14 is composed of an arc portion and a square portion, and a clearance groove 16 is set on both sides of the arc portion to meet the elastic displacement requirement of 1.2mm of the node 13 during assembly.

[0057] Embodiment three:

[0058] On the basis of the above-mentioned embodiments, the node plate 1 and the node head block 2 provided in this embodiment are both concave structures, and are both made of 2Cr13 stainless steel. The hardness requirements of the node plate 1 and the node head block 2 are both HRC50~HRC60, and the surfaces are hard anodized; the parallelism of the mating crimping surfaces of the node plate 1 and the node head block 2 is 0.005; the surface roughness of the node plate 1 and the node head block 2 at the contact with the parts is 1.6.

[0059] Embodiment 4:

[0060] The method for using the crimping device for the elastic coupling provided in the above embodiment comprises the following steps:

[0061] 1) Install the joint 13 into the stepped through hole 8 of the joint block 2, and screw into the countersunk through hole 12 with a screw to press and fix the joint 13;

[0062] 2) Place the coil spring 11 on both sides of the joint 13;

[0063] 3) Install the section plate 15 into the step countersunk hole 4 of the section plate 1;

[0064] 4) Slowly insert the positioning pin 9 into the first positioning hole 7 until the node block 1 contacts and presses on the coil spring 11, and at the same time, put the two connecting pins 10 into the first pressing pin hole 6;

[0065] 5) Insert the pressing pin shaft 3 into the first pressing pin hole 6 so that the lower end of the pressing pin shaft 3 touches the top of the connecting pin 10, and with the help of external force, the connecting pin 10 is pushed downward by the pressing pin shaft 3, so that the connecting pin 10 is downwardly connected to the shoulder of the joint head 13, and the assembly of the joint plate 15 and the joint head 13 is completed.

[0066] Wherein, before placing the coil spring 11 in step 2), the step also includes the step of bonding the coil spring 11 to the node 13 to ensure that the coil spring 11 is placed flat, that is, to ensure that the coil spring 11 does not bend or tilt.

[0067] Step 3) also includes the step of applying grease to the contact surface between the segment plate 15 and the segment plate 1 before installing the segment plate 15 into the step countersunk hole 4 of the segment plate 1 to prevent the segment plate 15 from loosening or shifting during assembly, thereby affecting the normal assembly and assembly accuracy.

[0068] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one.

[0069] The above is only a preferred embodiment of the present invention. The present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention. The above detailed description of the implementation mode of the present invention is combined with the accompanying drawings, but the present invention is not limited to the above implementation mode. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention, which are all within the protection scope of the technology.

Claims

1. A method for using a crimping device for an elastic coupling, characterized in that: The crimping device for the elastic coupling comprises a joint block (1), a joint head block (2) and a pressing pin shaft (3); The bottom surface of the node plate (1) is provided with a stepped countersunk hole (4) with a convex interface, and the top surface of the node plate (1) is provided with a first pressing pin hole (6) at the corresponding positions of the two shoulders (5) of the stepped countersunk hole (4); The node plate (1) is provided with two first positioning holes (7) which are symmetrically arranged and located at the periphery of the step countersunk hole (4); The step countersunk hole (4), the first pressing pin hole (6) and the first positioning hole (7) all extend axially; A concave-shaped step through hole (8) is provided on the joint block (2) at a position corresponding to the step counterbore (4), and a positioning pin (9) is provided on the top surface of the joint block (2) at a position corresponding to the first positioning hole (7) for inserting into the first positioning hole (7); There are two pressing pin shafts (3), and the lower end surfaces of the pressing pin shafts (3) are arc surfaces, which are respectively inserted into the first pressing pin holes (6) and then extend into the step countersunk hole (4) to abut against the top end of the connecting pin (10) disposed in the step countersunk hole (4), and the connecting pin (10) is coaxially arranged with the first pressing pin hole (6); A countersunk through hole (12) communicating with the step through hole (8) is provided on one side of the joint block (2) so as to allow a screw to be connected and enter the step through hole (8) to achieve fastening and limiting of the joint (13); It also includes two coil springs (11) symmetrically arranged in the step through hole (8) and respectively placed on both sides of the joint (13), and the connecting line of the two coil springs (11) is perpendicular to the connecting line of the two pressing pin shafts (3); The method of use includes the following steps: 1) Install the joint (13) into the stepped through hole (8) of the joint block (2), and screw the screw into the countersunk through hole (12) to fix the joint (13) by contact pressure; 2) placing coil springs (11) on both sides of the joint (13); 3) Install the segment plate (15) into the step countersunk hole (4) of the segment plate (1); 4) Slowly insert the positioning pin (9) into the first positioning hole (7) until the node plate (1) contacts and presses on the coil spring (11), and at the same time, insert the two connecting pins (10) into the first pressing pin hole (6); 5) Insert the pressing pin shaft (3) into the first pressing pin hole (6) so that the lower end of the pressing pin shaft (3) contacts and presses against the top of the connecting pin (10), and with the help of external force, the connecting pin (10) is pushed downward by the pressing pin shaft (3) so that the connecting pin (10) is connected downward to the shoulder portion (17) of the joint head (13), thereby completing the assembly of the joint plate (15) and the joint head (13).

2. The method for using the crimping device for an elastic coupling according to claim 1, characterized in that: The step 2) also includes a step of bonding the coil spring (11) to the joint (13) before placing the coil spring (11).

3. The method for using the crimping device for an elastic coupling according to claim 1, characterized in that: The step 3) also includes the step of applying grease to the contact surface between the node plate (15) and the node plate (1) before installing the node plate (15) into the step counterbore (4) of the node plate (1).

4. The method for using the crimping device for an elastic coupling according to claim 1, characterized in that: The cross-sectional shape of the second positioning hole (14) arranged at the top of the stepped through hole (8) is composed of a circular arc portion and a square portion.

5. The method for using the crimping device for an elastic coupling according to claim 4, characterized in that: A clearance groove (16) is provided on each side of the arc portion.

6. The method for using the crimping device for an elastic coupling according to claim 1, 2 or 3, characterized in that: The node plate (1) and the node head block (2) are both made of 2Cr13 stainless steel, and the hardness requirements of the node plate (1) and the node head block (2) are both HRC50-HRC60; The parallelism of the mating crimping surfaces of the node block (1) and the node head block (2) is 0.005; The surface roughness of the node block (1) and the node head block (2) at the contact points with the parts is 1.6.

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