Rotating structure of hydraulic door closing hinge

Abstract

A rotating structure of a hydraulic door closing hinge is characterized in that the door closing hinge comprises a door frame hinge piece, a door leaf hinge piece, an inner pipe, a shaft cover and a hydraulic inner pipe assembly arranged in the inner pipe, and on the premise that sealing turnover matching needed by the hydraulic inner pipe assembly is kept, a ball assembling structure designed at the position of a traditional shaft cover is changed. The epicyclic friction function and the axial load function of a traditional ball are separated, the epicyclic friction function and the axial load bearing function of a newly-designed shaft shoulder and plane thrust bearing structure are matched, the designed first needle bearing bears the epicyclic friction function between a shaft cover and a spring core rod, tasks are dispersed to two parts, one part is prevented from bearing multiple kinds of damage, and the service life of the ball bearing is prolonged. And the service life of parts is prolonged. After the design is changed, assembly and disassembly are simpler and more convenient, the complicated process of containing the balls one by one is not needed, the machining structure of the shaft cover and the spring core rod is simplified, and the machining cost is saved.

Description

Technical Field

[0001] The utility model relates to a door-controlled hinge in the hardware industry, in particular to an automatic door-closing hinge with a cam structure. Background Art

[0002] In the traditional hydraulic door closing buffer hinge, the door closing hinge adopts the combination of return spring hinge and hydraulic speed regulating hinge. The principle of automatic closing is as shown in the attached manual. Figure 1 As shown, the door leaf drives the hinge to open, which in turn drives the spring core rod 203 and the cam 205 to rotate, and the curved groove on the cam 205 and the pin 208 roll together. Since the pin 208 is stationary, the cam 205 performs an axial rotation and upward movement toward the spring 202 side, compressing the spring 202 to reserve the vertical spring force.

[0003] When the external force for opening the door disappears, the axial spring force stored in the spring 202 is released and acts in the opposite direction on the cam 205, which is converted into torque by the cam. The torque converted by the cam is transmitted to the door leaf through the spring core rod 203, driving the door to close automatically.

[0004] In the existing structure, in order to cooperate with the rotation of the cam 205 to generate damping, a one-way valve 207 and oil need to be set at the corresponding cam. The cam drives the one-way valve 207 to move axially, and the oil passes through the one-way valve to generate damping.

[0005] Furthermore, it is necessary to set up an inner tube 212, a shaft cover 213 and a lower head 214 for closing the openings at both ends, and place the hydraulic assembly components such as the cam and spring core rod, and the oil in the inner tube, and then use the shaft cover and the lower head to close the openings at both ends to form a hydraulic inner tube assembly that can prevent oil leakage.

[0006] Furthermore, since the spring core rod needs to axially pass through the inner tube, the upper head is coaxially fixed and connected to the door leaf by coaxial fixation, so that the spring core rod can rotate synchronously with the door opening, thereby compressing the spring to generate energy storage, and closing the door, the spring core rod actively drives the door to reverse and close the door.

[0007] Therefore, the shaft cover 213 plays a very critical role. It not only needs to keep the oil in the inner tube sealed, but also needs to allow the spring core rod to pass through, and needs to cooperate with the turnover of the spring core rod to reduce the friction generated to ensure smooth opening and closing of the door.

[0008] In order to achieve the above functions, the structure between the shaft cover and the spring core rod is as shown in the attached manual. Figure 2 As shown, the shaft cover 213 is provided with a center hole 2131 for the spring core rod 204 to pass through, and an O-ring 2132 needs to be provided between the center hole and the spring core rod, and between the outer circumference of the shaft cover and the inner circumference of the inner tube to seal the oil;

[0009] In order to reduce friction when the spring core rod rotates, the shaft cover is provided with an arcuate annular groove 2133 for accommodating and adapting the ball 215 at the corresponding positions of the spring core rod and the center hole of the shaft cover. By incorporating a plurality of balls, the axial relative position of the shaft cover and the spring core rod is maintained, and the free rotation between the two is guaranteed, while the load between them is transmitted.

[0010] However, the problems with this traditional structure are: 1. The assembly process of incorporating the ball bearings is very troublesome and needs to be operated one by one. Moreover, when one of the balls is damaged and needs to be repaired, disassembly and assembly is cumbersome. 2. In order to facilitate the installation of the ball bearings, arcuate ring grooves need to be machined on the spring core rod and the center hole of the shaft cover. The spring core rod is the outer peripheral surface, and turning processing is relatively conventional, but the inner peripheral surface of the center hole of the shaft cover needs to be bored to form an arcuate groove, which increases the processing cost. 3. The ball bearings not only have to bear the friction of circumferential rotation, but also need to bear the axial load caused by the weight of the door leaf. The ball bearings have to bear multiple tasks, which leads to accelerated wear and increased failure rate.

[0011] Therefore, it is necessary to improve the traditional structure between the shaft cover and the spring core rod to overcome the above problems. Utility Model Content

[0012] In order to solve the above technical deficiencies, the utility model provides a rotating structure of a hydraulic door hinge.

[0013] The technical solution of the utility model is: a rotating structure of a hydraulic door hinge, the door hinge comprises a door frame leaf, a door leaf, an inner tube, a shaft cover, and a hydraulic inner tube assembly arranged in the inner tube, the shaft cover is arranged at the inner tube mouth for sealing connection, and is provided with a center hole, the hydraulic inner tube assembly comprises a cam torque conversion mechanism and a hydraulic damping mechanism, the cam torque conversion mechanism comprises a spring core rod and a cylindrical groove cam, one end of the spring core rod cooperates with the cylindrical groove cam, and the other end passes through the center hole of the shaft cover for rotational cooperation and sealing, characterized in that: the end of the shaft cover relatively close to the cylindrical groove cam is a first end face, and the other side is a second end face, the spring core rod is provided with a shaft shoulder near the first end face, and a plane thrust bearing is provided between the shaft shoulder and the first end face;

[0014] The center hole is provided with a mounting hole on one side of the second end face, and a first needle bearing is provided between the mounting hole and the outer circumference of the spring core rod. O-rings are provided between the outer circumference of the shaft cover and the inner wall of the inner tube, and between the inner wall of the center hole and the outer circumference of the spring core rod.

[0015] The utility model is further configured as follows: the outer circumference of the shaft cover and the outer circumference of the spring core rod are respectively provided with a first groove and a second groove for installing an O-ring.

[0016] The utility model is further configured as follows: the inner tube is provided with a cam sleeve at the tube opening on one side of the cylindrical groove cam, the cam sleeve comprises a plug-in portion inserted into the inner tube, and a speed regulating shaft portion at the other end, a third groove is provided on the outer peripheral surface of the plug-in portion, and an O-type sealing ring is provided between the third groove and the inner wall surface of the inner tube;

[0017] A one-way valve is provided at the end of the cylindrical groove cam close to the speed regulating shaft;

[0018] The speed regulating shaft is provided with a speed regulating hole, in which a speed regulating valve, a speed regulating needle, a wire retaining ring and an O-ring are installed, and the speed regulating needle extends to the one-way valve.

[0019] The utility model is further configured as follows: the door leaf is provided with a first sleeve and a second sleeve, an upper head is provided at the end of the spring core rod away from the cylindrical groove cam, the end of the spring core rod is provided with a force adjustment hole, and a force adjustment screw installed in the force adjustment hole, the upper head is provided with an upper sleeve hole coaxially fixed with the outer circumference of the spring core rod, the upper head is inserted in the first sleeve, and the outer circumference is coaxially fixed with the first sleeve;

[0020] The speed regulating shaft is provided with a lower seal head, the lower seal head is provided with a lower sleeve hole coaxially fixed with the speed regulating shaft, and the lower seal head is inserted in the second sleeve;

[0021] The upper end cap is provided with a force regulating cover, and the lower end cap is provided with a speed regulating cover;

[0022] The door frame leaf is provided with a third sleeve, which is coaxially fixed with the outer circumference of the inner tube and arranged between the first and second sleeves. The end surfaces of the third sleeve adjacent to the first and second sleeves are both provided with retaining ring bearings.

[0023] The utility model is further configured as follows: a second needle roller bearing is arranged between the outer peripheral surface of the speed regulating shaft portion and the inner wall surface of the second sleeve.

[0024] Beneficial effects of the utility model: Under the premise of maintaining the sealing turnover required by the hydraulic inner tube assembly, the application changes the ball assembly structure designed at the traditional shaft cover, disassembles the turnover friction and axial load functions of the traditional ball, and cooperates with the newly designed shaft shoulder and plane thrust bearing structure to bear the axial load function, and the designed first needle bearing bears the turnover friction function between the shaft cover and the spring core rod. By distributing the tasks to two components, it avoids one piece from suffering multiple damages, and extends the service life of the components. After the design change, assembly and disassembly are simpler, and there is no need to incorporate the complicated process of the balls one by one, and the processing structure of the shaft cover and the spring core rod is simplified, saving processing costs.

[0025] Moreover, the present application optimizes the connection and coordination between the door leaf and the inner tube and the hydraulic inner tube assembly through the overall structural design of the cam sleeve, the upper head, the lower head, the second needle bearing and other components, making the door leaf open and close more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 For existing technical structure Figure 1 ;

[0027] Figure 2 For existing technical structure Figure 2 ;

[0028] Figure 3 The structure of the embodiment of the utility model Figure 1 ;

[0029] Figure 4 The structure of the embodiment of the utility model Figure 2 ;

[0030] Figure 5 for Figure 4 Enlarged view of the part in the middle circle.

[0031] Among them, 1-door frame leaf, 111-third sleeve, 12-second sleeve, 2-door leaf, 211-first sleeve, 212-second sleeve, 3-wire retaining ring, 4-O-type sealing ring, 5-cam sleeve O-type sealing ring, 6-cam O-type sealing ring, 7-spring core rod O-type sealing ring, 8-shaft cover O-type sealing ring, 9-first needle roller bearing, 10-second needle roller bearing, 11-plane thrust bearing, 12-retaining ring bearing, 13-retaining ring bearing, 14-spring bead, 15-cam cross pin, 16-spring cross pin, 17-cam roller sleeve, 18-spring, 19-speed regulating needle, 20-tightening bolt, 21-strong magnet, 22-check valve, 23-cam sleeve, 231-plug-in part, 232-speed regulating shaft, 24-cam, 25-spring core rod, 251-shaft, 26-shaft cover, 27-upper head, 28-force regulating screw, 29-speed regulating valve, 30-speed regulating cover, 31-force regulating cover, 32-lower head, 33-inner tube.

[0032] In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. DETAILED DESCRIPTION

[0033] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0034] like Figure 1-5 As shown, a rotating structure of a hydraulic door hinge, the door hinge comprises a door frame leaf 1, a door leaf 2, an inner tube 33, a shaft cover 26, and a hydraulic inner tube 33 assembly arranged in the inner tube 33, the shaft cover 26 is arranged at the pipe mouth of the inner tube 33 for sealing connection, and is provided with a center hole, the hydraulic inner tube 33 assembly comprises a cam torque conversion mechanism and a hydraulic damping mechanism, the cam torque conversion mechanism comprises a spring core rod 25 and a cylindrical groove cam 24, one end of the spring core rod 25 is matched with the cylindrical groove cam 24, and the other end passes through the center hole of the shaft cover 26 for rotational matching and sealing, the end of the shaft cover 26 relatively close to the cylindrical groove cam 24 is a first end face, and the other side is a second end face, the spring core rod 25 is provided with a shaft shoulder 251 near the first end face, and a plane thrust bearing 11 is provided between the shaft shoulder 251 and the first end face;

[0035] The center hole is provided with a mounting hole on one side of the second end face, and a first needle bearing 9 is provided between the mounting hole and the outer peripheral surface of the spring core rod 25, and an O-ring 7 is provided between the outer peripheral surface of the shaft cover 26 and the inner wall surface of the inner tube 33, and between the inner wall surface of the center hole and the outer peripheral surface of the spring core rod 25.

[0036] The outer circumference of the shaft cover 26 and the outer circumference of the spring core rod 25 are respectively provided with a first groove and a second groove for installing the O-ring 7.

[0037] The inner tube 33 is provided with a cam sleeve 23 at the tube opening on one side of the cylindrical groove cam 24. The cam sleeve 23 includes a plug-in portion 231 inserted in the inner tube 33 and a speed regulating shaft portion 232 at the other end. The outer peripheral surface of the plug-in portion 231 is provided with a third groove, and an O-type sealing ring 5 is provided between the third groove and the inner wall surface of the inner tube 33.

[0038] A one-way valve 22 is provided at the end of the cylindrical groove cam 24 close to the speed regulating shaft 232;

[0039] The speed regulating shaft 232 is provided with a speed regulating hole, in which a speed regulating valve 29 , a speed regulating needle 19 , a wire retaining ring 3 and an O-ring 4 are installed. The speed regulating needle 19 extends to the one-way valve 22 .

[0040] The door leaf 2 is provided with a second sleeve 2121 and a second sleeve 22. The end of the spring core rod 25 away from the cylindrical groove cam 24 is provided with an upper head 27. The end of the spring core rod 25 is provided with a force adjustment hole and a force adjustment screw 28 installed in the force adjustment hole. The upper head 27 is provided with an upper sleeve hole coaxially fixed with the outer circumference of the spring core rod 25. The upper head 27 is inserted in the second sleeve 2121, and the outer circumference is coaxially fixed with the second sleeve 2121.

[0041] The speed regulating shaft is provided with a lower end cap 32, the lower end cap 32 is provided with a lower sleeve hole coaxially fixed with the speed regulating shaft 232, and the lower end cap 32 is inserted into the second sleeve 22;

[0042] The upper end cap 27 is provided with a force regulating cover 31, and the lower end cap 32 is provided with a speed regulating cover 30;

[0043] The door frame leaf 1 is provided with a third sleeve 111 , which is coaxially fixed with the outer circumference of the inner tube 33 and is arranged between the first and second sleeves 22 . The end surfaces of the third sleeve adjacent to the first and second sleeves 22 are both provided with retaining ring bearings.

[0044] A second needle roller bearing 10 is disposed between the outer peripheral surface of the speed regulating shaft and the inner wall surface of the second sleeve 22 .

[0045] Under the premise of maintaining the sealing turnover cooperation required by the hydraulic inner tube 33 assembly, the present application changes the ball assembly structure designed at the traditional shaft cover 26, disassembles the turnover friction and axial load functions of the traditional ball, and uses the newly designed shaft shoulder 251 and the plane thrust bearing 11 structure to bear the axial load function, and the designed first needle bearing 9 bears the turnover friction function between the shaft cover 26 and the spring core rod 25. By distributing the tasks to two components, it avoids one component from suffering multiple damages, and prolongs the service life of the components. After the design change, assembly and disassembly are simpler, and there is no need to incorporate the complicated process of the balls one by one, and the processing structure of the shaft cover 26 and the spring core rod 25 is simplified, saving processing costs.

[0046] Moreover, the present application optimizes the connection and coordination between the door leaf 2 and the inner tube 33 and the hydraulic inner tube 33 assembly through the overall structural design of the cam sleeve 23, the upper head 27, the lower head 32, the second needle bearing 10 and other components, making the door leaf open and close more smoothly.

[0047] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A rotating structure of a hydraulic door hinge, the door hinge comprises a door frame leaf, a door leaf, an inner tube, a shaft cover, and a hydraulic inner tube assembly arranged in the inner tube, the shaft cover is arranged at the inner tube mouth for sealing connection, and is provided with a center hole, the hydraulic inner tube assembly comprises a cam torque conversion mechanism and a hydraulic damping mechanism, the cam torque conversion mechanism comprises a spring core rod and a cylindrical groove cam, one end of the spring core rod cooperates with the cylindrical groove cam, and the other end passes through the center hole of the shaft cover for rotational cooperation and sealing, characterized in that: The end of the shaft cover close to the cylindrical groove cam is a first end face, and the other side is a second end face. The spring core rod is provided with a shoulder near the first end face, and a plane thrust bearing is provided between the shoulder and the first end face. The center hole is provided with a mounting hole on one side of the second end face, and a first needle bearing is provided between the mounting hole and the outer circumference of the spring core rod. O-rings are provided between the outer circumference of the shaft cover and the inner wall of the inner tube, and between the inner wall of the center hole and the outer circumference of the spring core rod.

2. The rotating structure of a hydraulic door hinge according to claim 1, characterized in that: The outer circumferential surface of the shaft cover and the outer circumference of the spring core rod are respectively provided with a first groove and a second groove for installing an O-ring.

3. The rotating structure of a hydraulic door hinge according to claim 2, characterized in that: The inner tube is provided with a cam sleeve at the tube opening on one side of the cylindrical groove cam, and the cam sleeve includes a plug-in portion inserted in the inner tube and a speed regulating shaft portion at the other end, and a third groove is provided on the outer peripheral surface of the plug-in portion, and an O-type sealing ring is provided between the third groove and the inner wall surface of the inner tube; A one-way valve is provided at the end of the cylindrical groove cam close to the speed regulating shaft; The speed regulating shaft is provided with a speed regulating hole, in which a speed regulating valve, a speed regulating needle, a wire retaining ring and an O-ring are installed, and the speed regulating needle extends to the one-way valve.

4. The rotating structure of a hydraulic door hinge according to claim 3, characterized in that: The door leaf is provided with a first sleeve and a second sleeve, an upper head is provided at the end of the spring core rod away from the cylindrical groove cam, a force adjustment hole and a force adjustment screw installed in the force adjustment hole are provided at the end of the spring core rod, and an upper sleeve hole is provided on the upper head coaxially fixed with the outer circumference of the spring core rod, the upper head is inserted in the first sleeve, and the outer circumference is coaxially fixed with the first sleeve; The speed regulating shaft is provided with a lower seal head, the lower seal head is provided with a lower sleeve hole coaxially fixed with the speed regulating shaft, and the lower seal head is inserted in the second sleeve; The upper end cap is provided with a force regulating cover, and the lower end cap is provided with a speed regulating cover; The door frame leaf is provided with a third sleeve, which is coaxially fixed with the outer circumference of the inner tube and arranged between the first and second sleeves. The end surfaces of the third sleeve adjacent to the first and second sleeves are both provided with retaining ring bearings.

5. The rotating structure of a hydraulic door hinge according to claim 3, characterized in that: A second needle roller bearing is arranged between the outer peripheral surface of the speed regulating shaft portion and the inner wall surface of the second sleeve.

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