Rigid coupling

Abstract

The utility model provides a rigid coupler which comprises a clamping sleeve, a through open groove is machined in the clamping sleeve, and a first conical face and a second conical face are symmetrically machined on the outer portions of the two ends of the clamping sleeve. During connection, the jacket is sleeved on the end parts of the first main shaft and the second main shaft to be connected at the same time; the two ends of the outer portion of the clamping sleeve are sleeved with a first half coupler and a second half coupler in a conical surface fit mode respectively. The first half coupling and the second half coupling are fixedly connected through a bolt assembly and clamp the clamping sleeve. According to the coupler, the jackets with the openings are adopted, coaxial connection of the butt-joint main shafts is achieved through the jackets, reliable clamping of the jackets is achieved through the balance weight of the conical compression nuts, then torque transmission between the two main shafts is achieved, and the stability and reliability of follow-up equipment in the operation process are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, in particular to a rigid coupling. Background Art

[0002] Couplings are used for torque transmission during the operation of electromechanical equipment. They are mainly used to connect two shafts to make them rotate together and transmit motion and torque, so as to realize the connection and separation between the output shaft of a device and the input shaft of another device, thereby realizing power transmission and interruption.

[0003] At present, there are many types of couplings with rigid connections, including fixed couplings and movable couplings. Among them, fixed couplings include sleeve couplings, flange couplings, split-muff couplings, etc., and movable couplings include cross-slider couplings, slider couplings, chain couplings, gear couplings, and universal couplings, etc.

[0004] Among them, the most widely used one at present is the rigid sleeve coupling. The two half-shaft sleeves of this coupling are respectively docked with the two shaft ends to be docked through flat keys. The problem in the specific use process of this type of coupling is that since the two half-shaft sleeves and the main shaft usually adopt clearance fit, it is impossible to well ensure the coaxiality during the docking process of the two main shafts. In this way, during the subsequent operation process, excessive wear will occur at the shaft end part. When the wear amount is too large, the clearance will be further enlarged, and the coaxiality will be even more difficult to ensure. In this way, vibration will occur in the equipment during the subsequent operation process, seriously affecting the normal operation of the equipment. Summary of the Utility Model

[0005] To solve the current technical problems, the main purpose of the utility model is to provide a rigid coupling. This coupling realizes the coaxial connection of the docking main shafts through a jacket with an opening, and realizes the reliable clamping of the jacket through the counterweight of the tapered compression nut, thereby realizing the torque transmission between the two main shafts to ensure the stability and reliability during the subsequent operation of the equipment.

[0006] To achieve the above technical features, the purpose of the utility model is realized as follows: A rigid coupling includes a jacket. A through opening groove is processed on the jacket, and a first tapered surface and a second tapered surface are symmetrically processed on the outer parts of both ends of the jacket;

[0007] During connection, the jacket is simultaneously sleeved on the end parts of the first main shaft and the second main shaft to be connected;

[0008] The first half-coupling and the second half-coupling are respectively sleeved on the two outer ends of the jacket through tapered surface fit;

[0009] The first half coupling and the second half coupling are fixedly connected by a bolt assembly and clamp the jacket.

[0010] An inner hole is machined in the center of the jacket, and the inner hole is adapted to the first main shaft and the second main shaft to be connected.

[0011] A first inner tapered surface for mating with the first tapered surface is machined in the central portion of the first half coupling;

[0012] A second inner tapered surface for mating with the second tapered surface is machined in the central portion of the second half coupling.

[0013] The taper angles of the first tapered surface, the first inner tapered surface, the second tapered surface and the second inner tapered surface are 2° - 12°.

[0014] A dust-proof groove is provided on the mating end surfaces of the first half coupling and the second half coupling, and a dust-proof ring is installed at the position where the dust-proof groove is located.

[0015] The dust-proof ring is sleeved on the outer circumferential portion where the first half coupling and the second half coupling are mated.

[0016] The dust-proof groove is arc-shaped or rectangular, and the corresponding dust-proof ring is O-shaped or rectangular;

[0017] The dust-proof ring is a rubber dust-proof ring, a nitrile dust-proof ring, a silica gel dust-proof ring, a fluororubber dust-proof ring or a felt dust-proof ring.

[0018] The bolt assembly adopts a common bolt assembly. The common bolt assembly includes a first bolt. The first bolt passes through the bolt through-hole on the second half coupling, and the end of the first bolt is in mating connection with the threaded blind hole on the first half coupling. A flat washer and a spring washer are arranged on the joint surface between the first bolt and the second half coupling.

[0019] The bolt assembly adopts a countersunk head bolt assembly. The countersunk head bolt assembly includes a countersunk head bolt. The countersunk head bolt passes through the bolt through-hole on the second half coupling, and the end of the countersunk head bolt is in mating connection with the threaded blind hole on the first half coupling. The inner hexagonal end of the countersunk head bolt is in mating connection with the counterbore on the second half coupling. A flat washer and a spring washer are arranged on the joint surface between the countersunk head bolt and the second half coupling.

[0020] The bolt assembly adopts a tie bolt assembly. The tie bolt assembly includes a long bolt. The long bolt passes through the bolt through-holes on the second half coupling and the first half coupling. A flat washer, a spring washer and a nut are sequentially installed on the joint surface between the end of the long bolt and the first half coupling.

[0021] The utility model has the following beneficial effects:

[0022] 1. The coupling of the present utility model adopts a jacket with an opening to achieve coaxial connection of the butt joint main shaft through the jacket, and realizes reliable clamping of the jacket through the counterweight of the conical compression nut, thereby realizing torque transmission between the two main shafts to ensure the stability and reliability during the operation of subsequent equipment.

[0023] 2. The present utility model changes the characteristics of the original rigid coupling, which has a complex structure, high machining accuracy and technical requirements. The structure of the present utility model is simple, the machining accuracy requirement is general, it is simple and convenient to manufacture, the installation accuracy requirement is low, it is flexible and convenient to disassemble and assemble, the cost is low, funds are saved, the transmitted torque is large, and it is suitable for wide promotion.

[0024] 3. The present utility model uses a steel jacket, a half coupling, etc. as the rigid elements of the coupling, connects and fixes them with high-strength bolts, and uses materials such as rubber as the dust-proof ring. It is beneficial to machining, manufacturing and installation. After being tested and used on driving equipment such as belt conveyors and mixers, the effect is good, the efficiency is high, and it can operate continuously for a long time without damage.

[0025] 4. Through the above-mentioned conical surface fit, while fixing the first half coupling and the second half coupling, the jacket is clamped, and then high-precision coaxial fixing between the first main shaft and the second main shaft is realized through the jacket.

[0026] 5. Through the above-mentioned angle, the best clamping effect is ensured.

[0027] 6. Through the above-mentioned dust-proof ring, the effect of dust-proof inside is achieved.

[0028] 7. Through the above-mentioned ordinary bolt assembly, the reliable fixing of the first half coupling and the second half coupling is ensured.

[0029] 8. Through the above-mentioned jacket with an opening, torque transmission is realized through the clamping fit structure form, the previous key connection method is cancelled, and thus keyless connection is realized, ensuring the transmission accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0031] Figure 1 It is a structural diagram of the present utility model when using an ordinary bolt assembly.

[0032] Figure 2 It is a structural diagram of the present utility model when using a countersunk head bolt assembly.

[0033] Figure 3 It is a side view of the jacket of the present utility model.

[0034] Figure 4 It is a structural diagram of the present utility model when using a tie bolt assembly.

[0035] Figure 5 This is a structural diagram of the present utility model when using ordinary bolt components and externally installing the dust-proof ring.

[0036] Figure 6 This is a structural diagram of the present utility model when using countersunk head bolt components and externally installing the dust-proof ring.

[0037] In the figure: jacket 1, first half coupling 2, dust-proof ring 3, second half coupling 4, flat washer 5, spring washer 6, first bolt 7, first main shaft 8, second main shaft 9, countersunk head bolt 10, long bolt 11, nut 12;

[0038] Inner hole 101, first tapered surface 102, second tapered surface 103, opening groove 104;

[0039] First inner tapered surface 201, threaded blind hole 202;

[0040] Second inner tapered surface 401, bolt through hole 402, counterbore 403. Specific embodiments

[0041] The following further describes the embodiments of the present utility model with reference to the accompanying drawings.

[0042] Refer to Figures 1-6 , a rigid coupling, including a jacket 1, wherein a through opening groove 104 is machined on the jacket 1, and first tapered surface 102 and second tapered surface 103 are symmetrically machined on the outer parts of both ends of the jacket 1; during connection, the jacket 1 is simultaneously sleeved on the end parts of the to-be-connected first main shaft 8 and second main shaft 9; first half coupling 2 and second half coupling 4 are sleeved on the outer parts of both ends of the jacket 1 respectively through tapered surface fit; the first half coupling 2 and the second half coupling 4 are fixedly connected through a bolt assembly and clamp the jacket 1. This coupling realizes the coaxial connection of the butt joint main shafts through the jacket with an opening, and realizes the reliable clamping of the jacket through the counterweight of the tapered compression nut, thereby realizing the torque transmission between the two main shafts to ensure the stability and reliability during the operation of the subsequent equipment. During the specific use process, the jacket 1 is simultaneously clamped by the first half coupling 2 and the second half coupling 4, and then the high-precision coaxial fixation between the first main shaft 8 and the second main shaft 9 is realized through the jacket 1.

[0043] Furthermore, an inner hole 101 is machined at the center of the jacket 1, and the inner hole 101 is matched with the to-be-connected first main shaft 8 and second main shaft 9. Through the above inner hole 101, it is ensured that the jacket 1 is simultaneously connected to the first main shaft 8 and the second main shaft 9, thereby ensuring the subsequent coaxiality of the two.

[0044] Further, a first inner conical surface 201 for mating with the first conical surface 102 is machined at the central part of the first half coupling 2; further, a second inner conical surface 401 for mating with the second conical surface 103 is machined at the central part of the second half coupling 4. Through the above-mentioned conical surface mating, while fixing the first half coupling 2 and the second half coupling 4, the clamping sleeve 1 is clamped, and further, high-precision coaxial fixing between the first main shaft 8 and the second main shaft 9 is achieved through the clamping sleeve 1.

[0045] Further, the conical surface angles of the first conical surface 102, the first inner conical surface 201, the second conical surface 103, and the second inner conical surface 401 are 2° - 12°. Through the above angles, the best clamping effect is ensured.

[0046] Further, a dust-proof groove is provided on the mating end surfaces of the first half coupling 2 and the second half coupling 4, and a dust-proof ring 3 is installed at the position where the dust-proof groove is located. Through the above dust-proof ring 3, the effect of dust-proof inside is achieved.

[0047] Further, the dust-proof ring 3 is sleeved on the outer circular part where the first half coupling 2 and the second half coupling 4 are mated. Through the above installation method, the structure is simplified.

[0048] Further, the dust-proof groove is arc-shaped or rectangular, and the corresponding dust-proof ring 3 is O-shaped or rectangular; through the above structure, the adaptability is enhanced.

[0049] Further, the dust-proof ring 3 is a rubber dust-proof ring, a nitrile dust-proof ring, a silica gel dust-proof ring, a fluororubber dust-proof ring or a felt dust-proof ring. Through the above materials, the adaptability is enhanced.

[0050] Further, the bolt assembly is an ordinary bolt assembly. The ordinary bolt assembly includes a first bolt 7. The first bolt 7 passes through a bolt through hole 402 on the second half coupling 4, and the end of the first bolt 7 is in mating connection with a threaded blind hole 202 on the first half coupling 2. A flat washer 5 and a spring washer 6 are arranged on the joint surface of the first bolt 7 and the second half coupling 4. Through the above ordinary bolt assembly, the reliable fixation of the first half coupling 2 and the second half coupling 4 is ensured.

[0051] Further, the bolt assembly is a countersunk head bolt assembly. The countersunk head bolt assembly includes a countersunk head bolt 10. The countersunk head bolt 10 passes through a bolt through hole 402 on the second half coupling 4, and the end of the countersunk head bolt 10 is in mating connection with a threaded blind hole 202 on the first half coupling 2. The inner hexagonal end of the countersunk head bolt 10 is in mating connection with a countersunk hole 403 on the second half coupling 4. A flat washer 5 and a spring washer 6 are arranged on the joint surface of the countersunk head bolt 10 and the second half coupling 4. Through the above countersunk head bolt assembly, the reliable fixation of the first half coupling 2 and the second half coupling 4 is ensured.

[0052] Furthermore, the bolt assembly adopts a tie bolt assembly. The tie bolt assembly includes a long bolt 11. The long bolt 11 passes through the bolt through holes on the second half coupling 4 and the first half coupling 2. A flat washer 5, a spring washer 6 and a nut 12 are sequentially installed on the joint surface of the end of the long bolt 11 and the first half coupling 2. The reliable fixation of the first half coupling 2 and the second half coupling 4 is ensured by the above-mentioned tie bolt assembly.

[0053] The specific assembly operation method of the present utility model:

[0054] Design and manufacture the steel jacket and the two half couplings according to the load, power, shaft diameter of the operating equipment to be connected and the performance of the materials required by the use environment, etc., and select high-strength hexagon head bolts, square head bolts and socket head cap screws as the connecting fasteners. During installation and use, first install the first half coupling 2, then install the jacket 1, then install the other and the second half coupling 4, put on the connecting bolts, and place the dust ring 3. Tighten the bolt assembly in sequence to make the first half coupling 2 and the second half coupling 4 pull towards each other, so that the jacket 1 shrinks and is fastened on the first main shaft 8 and the second main shaft 9, thereby ensuring the coaxiality of the first main shaft 8 and the second main shaft 9;

[0055] At the same time, through the inclined surface fit between the jacket 1 and the first half coupling 2 and the second half coupling 4, reliable clamping between the first main shaft 8 and the second main shaft 9 can be achieved, thereby ensuring the firm connection between the two, so as to achieve the effect of torque transmission without using key transmission, ensuring the subsequent transmission accuracy and stability.

Claims

1. A rigid coupling, characterized in that, It includes a jacket (1) with a through opening groove (104) machined thereon, and first tapered surfaces (102) and second tapered surfaces (103) are symmetrically machined on the outer ends of both ends of the jacket (1); During connection, the jacket (1) is simultaneously sleeved on the end parts of a first main shaft (8) and a second main shaft (9) to be connected; On the outer ends of both sides of the jacket (1), a first half coupling (2) and a second half coupling (4) are sleeved respectively through tapered surface fitting; The first half coupling (2) and the second half coupling (4) are fixedly connected by a bolt assembly and clamp the jacket (1).

2. The rigid coupling according to claim 1, wherein: An inner hole (101) is machined in the center of the jacket (1), and the inner hole (101) is matched with the first main shaft (8) and the second main shaft (9) to be connected.

3. The rigid coupling according to claim 1, wherein: A first inner tapered surface (201) for mating with the first tapered surface (102) is machined at the center of the first half coupling (2); A second inner tapered surface (401) for mating with the second tapered surface (103) is machined at the center of the second half coupling (4).

4. The rigid coupling according to claim 3, wherein: The taper angles of the first tapered surface (102), the first inner tapered surface (201), the second tapered surface (103) and the second inner tapered surface (401) are 2° - 12°.

5. The rigid coupling according to claim 1, characterized in that: Dust-proof grooves are arranged on the mating end faces of the first half coupling (2) and the second half coupling (4), and dust-proof rings (3) are installed at the positions where the dust-proof grooves are located.

6. The rigid coupling according to claim 5, wherein: The dust-proof rings (3) are sleeved on the outer circular parts where the first half coupling (2) and the second half coupling (4) are mated.

7. The rigid coupling according to claim 6, wherein: The dust-proof grooves are arc-shaped or rectangular, and the corresponding dust-proof rings (3) are O-shaped or rectangular; The dust-proof rings (3) are rubber dust-proof rings, nitrile dust-proof rings, silicone dust-proof rings, fluororubber dust-proof rings or felt dust-proof rings.

8. The rigid coupling according to claim 1, wherein: The bolt assembly is a common bolt assembly. The common bolt assembly includes a first bolt (7). The first bolt (7) passes through a bolt through-hole (402) on the second half coupling (4), and the end of the first bolt (7) is connected in cooperation with a threaded blind hole (202) on the first half coupling (2). A flat washer (5) and a spring washer (6) are arranged on the joint surface between the first bolt (7) and the second half coupling (4).

9. The rigid coupling according to claim 1, wherein: The bolt assembly is a countersunk head bolt assembly. The countersunk head bolt assembly includes a countersunk head bolt (10). The countersunk head bolt (10) passes through a bolt through-hole (402) on the second half coupling (4), and the end of the countersunk head bolt (10) is connected in cooperation with a threaded blind hole (202) on the first half coupling (2). The inner hexagonal end of the countersunk head bolt (10) is matched with a countersunk hole (403) on the second half coupling (4). A flat washer (5) and a spring washer (6) are arranged on the joint surface between the countersunk head bolt (10) and the second half coupling (4).

10. The rigid coupling according to claim 1, wherein: The bolt assembly is a tie bolt assembly. The tie bolt assembly includes a long bolt (11). The long bolt (11) passes through bolt through-holes on the second half coupling (4) and the first half coupling (2). A flat washer (5), a spring washer (6) and a nut (12) are sequentially installed on the joint surface between the end of the long bolt (11) and the first half coupling (2).

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