Short-span elastic pin coupling

Abstract

The short-span elastic pin coupling comprises a main half coupling, an auxiliary half coupling, a plurality of elastic pins and an outer baffle, a circular containing groove is coaxially formed in the center of one shaft end of the main half coupling, and a plurality of extrusion grooves communicated with the containing groove are evenly formed in the periphery of the containing groove; the auxiliary half coupling is inserted into the containing groove, is coaxial with the main half coupling and can rotate relative to the main half coupling, protruding claws corresponding to the extrusion grooves are evenly distributed on the outer side wall of the auxiliary half coupling along the circumference of the auxiliary half coupling, and the protruding claws are correspondingly inserted into the middles of the extrusion grooves. The two sides of each protruding claw and the two opposite ends of each extrusion groove are combined to form pin holes for the elastic pins to be inserted, the pin holes are matched with the elastic pins, the elastic pins are correspondingly inserted into the pin holes, the outer baffles are detachably fixed to outer side ports of the extrusion grooves, and the outer baffles are detachably fixed to the outer side ports of the extrusion grooves. And the convex claws and the elastic pins in the extrusion grooves are shielded.

Description

Technical Field

[0001] The invention relates to the technical field of elastic couplings, and in particular to a short-span elastic pin coupling. Background Art

[0002] Scraper conveyor is the main transportation equipment of comprehensive mechanized coal mining face. The elastic coupling is a torque transmission device widely used in the power unit of the scraper conveyor. It is installed between the motor shaft and the reducer shaft. The motor is installed on the reducer housing through the cover cantilever. With the heavy process, the power of the scraper conveyor power unit is getting bigger and bigger. At present, the largest single-unit installed power in China has reached 3000 kilowatts, the weight has reached 14500 kilograms, and the overall dimensions (length × width × height) have reached 3300 × 1100 × 1400mm. The existing elastic coupling generally adopts a structure setting of two half-couplings crossing each other. Its axial length is large, so that the cover cantilever connected between the motor and the reducer also needs to be lengthened accordingly. The supporting force of the lengthened cover cantilever will be weakened. During the long-term operation of the scraper conveyor, the high-power motor is easy to sink under the action of gravity, resulting in the cover cantilever being easy to deform, and the coaxiality of the motor and the reducer cannot be guaranteed, causing the motor to easily damage the reducer input shaft and the elastic coupling when running at high speed. Summary of the invention

[0003] In view of this, it is necessary to provide a short-span elastic pin coupling to solve the technical problem in the prior art that the two half-couplings have a large axial length, resulting in a weakened cantilever support force of the hood tube.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A short-span elastic pin coupling comprises a main half-coupling, a secondary half-coupling, a plurality of elastic pins and an outer baffle. A circular receiving groove is coaxially opened at the center of one of the axial ends of the main half-coupling, and a plurality of extrusion grooves connected with the receiving groove are evenly opened around the receiving groove. The secondary half-coupling is inserted in the receiving groove, is coaxially arranged with the main half-coupling, and can rotate relatively with the main half-coupling. On the outer side wall of the secondary half-coupling, convex claws corresponding to the extrusion grooves are evenly arranged along its circumference, and the convex claws are correspondingly inserted in the middle of each extrusion groove, and the two sides of each convex claw are respectively combined with the opposite ends of each extrusion groove to form a pin hole for inserting the elastic pin, the pin hole matches the elastic pin, and the elastic pin is correspondingly inserted in each pin hole, and the outer baffle is detachably fixed on the outer side port of the extrusion groove to shield the convex claws and the elastic pin in the extrusion groove.

[0005] Preferably, arc-shaped grooves are respectively provided on both sides of each protruding claw, and arc-shaped grooves are also opened on the two side ends of each extrusion groove facing the protruding claw. After the protruding claws are correspondingly inserted into the extrusion grooves, the arc-shaped grooves on both sides of each protruding claw are directly opposite to the arc-shaped grooves at both ends of the inserted extrusion grooves, and are combined to form the above-mentioned pin hole. The elastic pin is an elliptical cylinder. After the elastic pin is inserted into the pin hole, the outer arc surfaces of the two end points of the long axis of the elastic pin are respectively facing the direction of the corresponding arc-shaped grooves of each protruding claw and extrusion groove, and are in contact with them.

[0006] Preferably, a through hole is opened at the center of each elastic pin and passes through its two ends, an elastic member is inserted into the through hole, the length of the elastic member is equal to the length of the through hole, the force-bearing surfaces on both sides of the elastic member are respectively facing the two end points of the long axis of the elastic pin, and the force-bearing surfaces on both sides of the elastic member are respectively in contact with the inner walls on both sides of the through hole.

[0007] Preferably, the through hole is a waist-shaped hole, the ends of the two arcs of the through hole are respectively facing the two end points of the short axis of the elastic pin, the elastic member is a wavy elastic steel sheet, the elastic member is vertically inserted in the through hole, and the wavy surfaces on both sides of the elastic member are stress-bearing surfaces.

[0008] Preferably, gaskets are respectively arranged on the inner side walls of each through hole in the direction of the two end points of the long axis of the elastic pin, and the gaskets are in contact with the force-bearing surfaces on both sides of the elastic member.

[0009] Preferably, the other axial end of the main half-coupling is integrally provided with a main connecting sleeve, a first axial hole is opened in the center of the main connecting sleeve, the first axial hole is opened coaxially with the main half-coupling, and a first keyway is opened on the inner side wall of the first axial hole along its axial direction.

[0010] Preferably, a second axial hole is opened at the center of the secondary connecting sleeve, the second axial hole is opened coaxially with the secondary half-coupling, and a second keyway is opened on the inner side wall of the second axial hole along the axial direction thereof.

[0011] It can be seen from the above technical scheme that the short-span elastic pin coupling provided by the present application includes a main half-coupling, a secondary half-coupling, a plurality of elastic pins and an outer baffle. A circular receiving groove is coaxially opened at the center of one of the axial ends of the main half-coupling, and a plurality of extrusion grooves connected to the receiving groove are evenly opened around the receiving groove. The secondary half-coupling is inserted in the receiving groove, coaxially arranged with the main half-coupling, and can rotate relative to the main half-coupling. On the outer side wall of the secondary half-coupling, there are evenly arranged along its circumference protruding claws corresponding to the extrusion grooves, the protruding claws are correspondingly inserted in the middle of each extrusion groove, and the two sides of each protruding claw are respectively combined with the opposite ends of each extrusion groove to form a pin hole for inserting the elastic pin, the pin hole matches the elastic pin, and the elastic pin is correspondingly inserted in each pin hole, and the outer baffle is detachably fixed on the outer side port of the extrusion groove to shield the protruding claws and elastic pin in the extrusion groove. By arranging the receiving groove and the extrusion groove to nest the auxiliary half-coupling with the main half-coupling, the axial length between the auxiliary half-coupling and the main half-coupling is shortened, thereby shortening the length of the cover cantilever connected between the motor and the reducer, improving the supporting force of the cover cantilever, reducing the deformation of the cover cantilever, further ensuring the coaxiality of the connection between the motor and the reducer, extending the service life of the reducer input shaft and the elastic coupling, and improving the stability of the scraper conveyor. In addition, a detachable outer baffle is used to shield the cam and the elastic pin in the extrusion groove. When performing maintenance, the elastic pin can be replaced without removing the auxiliary half-coupling, making maintenance more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the main structure of the invention.

[0013] Figure 2 It is a schematic diagram of the structure of one side of the invention.

[0014] Figure 3 It is a schematic diagram of the three-dimensional structure of the invention.

[0015] Figure 4 It is a schematic diagram of the three-dimensional structure from another angle of the invention.

[0016] Figure 5 It is a schematic diagram of the assembly structure of the invention.

[0017] Figure 6 It is a schematic diagram of the structure of the auxiliary half-coupling of the invention.

[0018] Figure 7 This is a schematic diagram of the main half-coupling structure of the invention.

[0019] Figure 8 It is a schematic diagram of the elastic pin structure of the invention.

[0020] Fig. 9 This is a schematic diagram of the assembly structure of the main half-coupling and the auxiliary half-coupling of the invention.

[0021] Fig.10 This is a schematic diagram of the assembly structure of the main half-coupling, elastic pin and auxiliary half-coupling of the invention.

[0022] Fig.11 for Figure 2 Schematic diagram of the cross-sectional structure along the middle edge AA.

[0023] In the figure: a main half-coupling 10, a secondary half-coupling 20, an elastic pin 30, an outer baffle 40, a fixing bolt 41, a receiving groove 11, an extrusion groove 12, a protruding claw 21, a pin hole 13, a through hole 31, an elastic member 32, a gasket 33, a connecting sleeve 13, a first shaft hole 14, a first keyway 15, a second shaft hole 22, and a second keyway 23. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. 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 creative work.

[0025] Please see Figures 1 to 4 The embodiment of the present invention provides a short-span elastic pin coupling, which is used to be installed between the motor shaft and the reducer shaft of the power unit of the scraper conveyor for torque transmission. The short-span elastic pin coupling includes a main half-coupling 10, a secondary half-coupling 20, a plurality of elastic pins 30 and an outer baffle 40. A circular receiving groove 11 is coaxially provided at the center of the end face of one of the shaft ends of the main half-coupling 10, and a plurality of extrusion grooves 12 that are interconnected with the receiving groove 11 are evenly distributed around the receiving groove 11. One end of the secondary half-coupling 20 is inserted into the receiving groove 11, and is coaxially arranged with the main half-coupling 10, and can rotate relative to the main half-coupling 10. The end of the secondary half-coupling 20 inserted into the receiving groove 11 is The outer wall of the part is evenly provided with protruding claws 21 corresponding to the extrusion grooves 12 along its circumference, and the protruding claws 21 are correspondingly inserted in each extrusion groove 12. The two sides of each protruding claw 21 are respectively combined with the two opposite ends of each extrusion groove 12 to form a pin hole 13 for inserting an elastic pin 30. The pin hole 13 matches the elastic pin 30, and the elastic pin 30 is correspondingly inserted in each pin hole 13. The outer baffle plate 40 is detachably fixed on the outer port of the extrusion groove 12 to shield the protruding claws 21 and the elastic pin 30 in the extrusion groove 12.

[0026] Please see Figure 5 , Figure 6 , Figure 7 , Fig. 9 and Fig.11 Specifically, four extrusion grooves 12 are evenly distributed around the circumference of the receiving groove 11. The extrusion groove 12 is an arc-shaped groove body, and the center point of the arc-shaped groove body coincides with the center point of the receiving groove 11. The extrusion groove 12 and the receiving groove 11 are connected to each other. There are four protruding claws 21, which are evenly distributed along the circumference of the outer wall of the secondary half-coupling 20. The protruding claws 21 are fixed as a whole around the secondary half-coupling 20. The secondary half-coupling 20 is a cylindrical structure, and its diameter matches the receiving groove 11. The secondary half-coupling 20 is inserted into the receiving groove 11, and the four protruding claws 21 on its outer wall are respectively inserted into the four extrusion grooves 12. The protruding claws 21 are flush with the end surface of the extrusion groove 12, and arc-shaped grooves are respectively provided on both sides of each protruding claw 21. The arc-shaped grooves on both sides of each protruding claw 21 are respectively facing the opposite side. In the direction of the two end points of the extrusion groove 12, the arc grooves on both sides of each cam 21 are opposite to the arc grooves at the two end points of each inserted extrusion groove 12, and are combined to form the above-mentioned pin hole 13, and there are eight pin holes 13. The elastic pin 30 is an elliptical cylinder made of high-elastic rubber. After the elastic pin 30 is correspondingly inserted into each pin hole 13, the axial direction of the elastic pin 30 is parallel to the axial direction of the secondary half-coupling 20, and the outer arc surfaces of the two end points of the long axis of the elastic pin 30 are respectively facing the corresponding cams 21 and the arc groove direction of the extrusion groove 12, and are in close contact with them. The elastic pin 30 is used to separate the cam 21 and the two end points of the extrusion groove 12 from each other, so that the arc grooves on both sides of the cam 21 and the arc grooves at the two end points of the extrusion groove 12 do not contact each other.

[0027] Please see Figure 5 , Figure 8 and Fig.10 A through hole 31 is formed at the center of each elastic pin 30 along its axial direction and passes through both ends thereof. An elastic member 32 is inserted into the through hole 31. The length of the elastic member 32 is equal to the length of the through hole 31. The force-bearing surfaces on both sides of the elastic member 32 are respectively oriented toward the two end points of the long axis of the elastic pin 30, and the force-bearing surfaces on both sides of the elastic member 32 are respectively in contact with the inner side walls on both sides of the through hole 31.

[0028] When the main half-coupling 10 and the secondary half-coupling 20 rotate relative to each other, each extrusion groove 12 simultaneously forms an extrusion force on the elastic pin 30 on one side of its rotation direction, and the torque of the main half-coupling 10 is transmitted to the secondary half-coupling 20 through the elastic pin 30. Since the elastic pin 30 is designed as an elliptical cylinder, the two opposite arc-shaped grooves in the pin hole 13 are stuck on the outer arc surfaces of the two end points of the long axis of the elastic pin 30, which can play a limiting role for it, and can prevent the elastic pin 30 from rotating in the pin hole 13 during the torque transmission process between the main half-coupling 10 and the secondary half-coupling 20, so that the force direction of the elastic pin 30 remains unchanged, and then the force surfaces on both sides of the elastic member 32 in the through hole 31 of the elastic pin 30 are always facing the arc-shaped groove direction of the cam 21 and the extrusion groove 12.

[0029] Please continue to see Figure 5 , Figure 8 and Fig.10 The through hole 31 is a waist-shaped hole, and the ends of the two arcs of the through hole 31 are respectively facing the two end points of the short axis of the elastic pin 30. The elastic member 32 is a wavy elastic steel sheet bent at four degrees. The elastic member 32 is vertically inserted into the through hole 31, and the wavy surfaces on both sides of the elastic member 32 are stress-bearing surfaces.

[0030] After a through hole 31 is opened in the center of the elastic pin 30, a hollow structure is formed. When the elastic pin 30 is subjected to pressure, the hollow structure can better absorb the impact force and improve the buffering force, and has a good resilience after the pressure is released. In addition, a wavy elastic steel sheet is arranged in the through hole 31, and the wavy elastic steel sheet can support the elastic pin 30. When the elastic pin 30 is squeezed by the cam 21 and the extrusion groove 12, it is deformed and an extrusion pressure is formed on the wavy elastic steel sheet in the through hole 31. The wavy elastic steel sheet is deformed after being subjected to the extrusion pressure, which can absorb energy. After the pressure is released, the resilience and supporting force of the elastic pin 30 can be improved, thereby increasing the stability of the elastic pin 30.

[0031] Please continue to see Figure 8 Furthermore, gaskets 33 are respectively provided on the inner side walls of each through hole 31 in the direction of the two end points of the long axis of the elastic pin 30. The gaskets 33 are high-strength steel sheets. The gaskets 33 are parallel to the elastic member 32. The elastic member 32 is clamped between the two gaskets 33. The force-bearing surfaces on both sides of the elastic member 32 are in contact with the gaskets 33. By providing the gaskets 33, the force-bearing area between the elastic member 32 and the through hole 31 of the elastic pin 30 can be increased, and the point contact of the elastic member 32 is changed into surface contact, so that the elastic member 32 can be subjected to uniform force, and can effectively absorb the large load formed by the instantaneous impact of the cam 21 and the extrusion groove 12.

[0032] Please see Figure 4 and 5The outer baffle 40 is two semicircular shapes, which are combined to form an annular structure. The outer baffle 40 is installed on the outer port of the extrusion groove 12 by means of fixing bolts 41, and is coaxially arranged with the main half-coupling 10. The outer baffle 40 is used to shield the cam 21 and the elastic pin 30 in the extrusion groove 12, and plays a role in connecting the main half-coupling 10 with the secondary half-coupling 20, and prevents the secondary half-coupling 20 from escaping from the receiving groove 11 of the main half-coupling 10. In addition, since the elastic pin 30 is a wearing part, it needs to be replaced regularly. When replacing and maintaining the elastic pin 30, the pin hole 13 can be opened after removing the outer baffle 40, and the elastic pin 30 can be replaced without removing the secondary half-coupling 20, making maintenance more convenient.

[0033] Please see Figure 3 and Figure 4 The other shaft end of the main half coupling 10 is integrally provided with a connecting sleeve 13, and a first shaft hole 14 for connecting the motor shaft is provided in the center of the connecting sleeve 13. The first shaft hole 14 is coaxially provided with the main half coupling 10, and a first keyway 15 is provided in the inner side wall of the first shaft hole 14 along its axial direction. A second shaft hole 22 for connecting the input shaft of the reducer is provided in the center, and the second shaft hole 22 is coaxially provided with the auxiliary half coupling 20, and a second keyway 23 is provided in the inner side wall of the second shaft hole 22 along its axial direction. The first shaft hole 14 is coaxially provided with the second shaft hole 22.

[0034] The short span elastic pin 30 coupling is used to be installed between the motor shaft and the reducer shaft of the scraper conveyor power unit for torque transmission. During installation, the motor shaft of the scraper conveyor power unit is inserted into the first shaft hole 14 of the main half coupling 10, and a key is inserted into the first keyway 15 to fix it circumferentially, and the reducer shaft is inserted into the second shaft hole 22 of the auxiliary half coupling 20, and a key is inserted into the second keyway 23 to fix it circumferentially.

[0035] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A short span elastic pin coupling, characterized in that: It includes a main half-coupling, a secondary half-coupling, a plurality of elastic pins and an outer baffle. A circular receiving groove is coaxially opened at the center of one of the axial ends of the main half-coupling, and a plurality of extrusion grooves connected with the receiving groove are evenly opened around the receiving groove. The secondary half-coupling is inserted in the receiving groove, coaxially arranged with the main half-coupling, and can rotate relatively with the main half-coupling. On the outer side wall of the secondary half-coupling, convex claws corresponding to the extrusion grooves are evenly arranged along its circumference, and the convex claws are correspondingly inserted in the middle of each extrusion groove, and the two sides of each convex claw are respectively combined with the two ends opposite to each extrusion groove to form a pin hole for inserting the elastic pin, and the pin hole matches the elastic pin, and the elastic pin is correspondingly inserted in each pin hole, and the outer baffle is detachably fixed on the outer side port of the extrusion groove to shield the convex claws and the elastic pin in the extrusion groove.

2. The short span elastic pin coupling according to claim 1, characterized in that: Each claw is provided with an arc-shaped groove on both sides, and each extrusion groove is also provided with an arc-shaped groove on the two side ends facing the claw. After the claws are correspondingly inserted into the extrusion grooves, the arc-shaped grooves on both sides of each claw are directly opposite to the arc-shaped grooves at both ends of the inserted extrusion grooves, and are combined to form the above-mentioned pin hole. The elastic pin is an elliptical cylinder. After the elastic pin is inserted into the pin hole, the outer arc surfaces of the two end points of the long axis of the elastic pin are respectively facing the direction of the corresponding arc-shaped grooves of each claw and extrusion groove, and are in contact with them.

3. The short span elastic pin coupling according to claim 2, characterized in that: A through hole is provided at the center of each elastic pin, which passes through both ends thereof. An elastic member is inserted into the through hole. The length of the elastic member is equal to the length of the through hole. The force-bearing surfaces on both sides of the elastic member are respectively oriented towards the two end points of the long axis of the elastic pin, and the force-bearing surfaces on both sides of the elastic member are respectively in contact with the inner side walls on both sides of the through hole.

4. The short span elastic pin coupling according to claim 3, characterized in that: The through hole is a waist-shaped hole, and the ends of the two arcs of the through hole are respectively oriented towards the two end points of the short axis of the elastic pin. The elastic member is a wavy elastic steel sheet, which is vertically inserted into the through hole, and the wavy surfaces on both sides of the elastic member are stress-bearing surfaces.

5. The short span elastic pin coupling according to claim 4, characterized in that: Gaskets are respectively arranged on the inner side walls of each through hole in the direction of the two end points of the long axis of the elastic pin, and the gaskets are in contact with the force-bearing surfaces on both sides of the elastic member.

6. The short span elastic pin coupling according to claim 5, characterized in that: The other axial end of the main half-coupling is integrally provided with a connecting sleeve, a first axial hole is opened in the center of the connecting sleeve, the first axial hole is opened coaxially with the main half-coupling, and a first keyway is opened on the inner side wall of the first axial hole along its axial direction.

7. The short span elastic pin coupling according to claim 6, characterized in that: A second axial hole is provided at the center of the secondary connecting sleeve, the second axial hole is coaxially provided with the secondary half-coupling, and a second keyway is provided on the inner side wall of the second axial hole along its axial direction.

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