Hinge mandrel

Abstract

The utility model relates to the technical field of hinges, in particular to a hinge core shaft which comprises a shaft core and a piston arranged in a piston sleeve, the whole shaft core is cylindrical, a longitudinal through hole is formed along the cylindrical axis of the shaft core, the longitudinal through hole is a threaded hole, a pin groove which is longitudinally formed and penetrates through the middle of the shaft core is formed in the outer surface of the middle of the shaft core, and the piston is arranged in the pin groove. Two symmetrical piston spiral grooves penetrating through the middle of the piston are formed in the outer surface of the middle of the piston, a transmission part is arranged at the upper end of the shaft core, a necking part is arranged at the lower end of the shaft core, the necking part is a cuboid, a pin shaft is connected to the tail end of the necking part in an inserted mode, and a cross-shaped inserting groove matched with the pin shaft is formed in the piston. The utility model has the beneficial effects that the matching structure of the shaft core and the piston is convenient to process, and the running smoothness of the core shaft is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, in particular to a hinge core shaft. Background Art

[0002] Hinges are usually used for door leaf installation. The invention patent with patent application number CN201110185930.5 discloses a multifunctional hinge core shaft. The core shaft is cylindrical as a whole. One side of the outer surface of the upper end is cut parallel to the cylindrical axis to form a connecting plane (202) and a horizontal concave platform (201). The lower end is provided with a neck portion (203). The outer surface of the neck portion (203) is provided with a plurality of evenly distributed teeth (204). A longitudinal through hole (208) is provided along the cylindrical axis of the core shaft (1). The longitudinal through hole (208) is a threaded hole. A longitudinal through hole (208) is provided on the outer surface of the middle part of the core shaft (1). 1) a pin groove (207) in the middle, the pin groove (207) is connected to the longitudinal through hole (208), and on the outer surface of the shaft core (1) between the horizontal concave platform (201) and the pin groove (207), a shaft core oil seal groove (205) and a steel ball groove (206) are sequentially provided from top to bottom, and the shaft core oil seal groove (205) and the steel ball groove (206) are both perpendicular to the cylindrical axis of the shaft core (1); the piston (13) is also cylindrical as a whole, and a longitudinal sliding groove (301) is provided along the cylindrical axis of the piston (13), and a tooth groove (302) adapted to the tooth (204) is provided on the inner wall of the longitudinal sliding groove (301).

[0003] In actual use, since the tooth grooves in the piston need to engage with the teeth on the shaft core to realize the function, the processing accuracy requirements are very high, resulting in great processing difficulty, low production efficiency, and not smooth operation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a hinge core shaft in view of the above-mentioned deficiencies in the prior art, wherein the matching structure between the shaft core and the piston is easy to process and the running smoothness of the core shaft is improved.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hinge core shaft, comprising an axis core and a piston arranged in a piston sleeve, the axis core being cylindrical as a whole, and a longitudinal through hole being provided along the cylindrical axis of the axis core, the longitudinal through hole being a threaded hole, and a pin groove being longitudinally opened and passing through the middle of the axis core being provided on the outer surface of the middle of the axis core, the pin groove being connected to the longitudinal through hole, the outer surface of the axis core being provided with an axis core oil seal groove and a steel ball groove in sequence from top to bottom, the axis core oil seal groove and the steel ball groove being perpendicular to the cylindrical axis of the axis core, the piston being cylindrical as a whole, and two symmetrical piston spiral grooves passing through the middle of the piston being provided on the outer surface of the middle of the piston, a piston oil seal groove being provided on the outer surface of the lower part of the piston, the piston oil seal groove being perpendicular to the cylindrical axis of the piston, a one-way valve being provided at the lower end of the piston, the one-way valve The valve is provided with a speed regulating valve hole, which is connected to the inner cavity of the piston, and the upper part of the shaft core is sequentially covered with a shaft core fixing sleeve and a steel ball support ring from top to bottom, and a needle bearing is provided between the upper part of the shaft core fixing sleeve and the shaft core, and the steel ball is arranged in the steel ball groove and is limited by the lower end of the shaft core fixing sleeve and the upper end of the steel ball support ring; a shaft core oil seal is provided in the shaft core oil seal groove, and the shaft core fixing sleeve, steel ball support ring and piston sleeve are arranged in the inner hole of the outer sleeve, and the inner hole of the outer sleeve is arranged along the axis of its length direction; a closing force adjustment mechanism is provided in the longitudinal through hole, and a closing speed adjustment mechanism is provided at the lower end of the piston; the upper end of the shaft core is a transmission part, and a shrinkage neck is provided at the lower end; the shrinkage neck is a rectangular parallelepiped, and a pin shaft is inserted at its end; a cross-shaped slot adapted to the pin shaft is provided inside the piston, and the cross-shaped slot is located above the one-way valve.

[0006] A further configuration of the present invention is that: a plurality of evenly distributed teeth are provided on the outer surface of the transmission portion of the shaft core, and a transmission sleeve meshing with the transmission portion is provided on the outer sleeve of the transmission portion.

[0007] A further arrangement of the utility model is: an inner side wall of the upper end of the inner hole of the outer sleeve is provided with an inwardly concave upper step, the steel ball support ring is embedded in the lower table surface of the upper step, the shaft core fixing sleeve is inserted into the inner hole of the outer sleeve from top to bottom to press the steel ball support ring, and a shaft core fixing sleeve oil seal is provided between the shaft core fixing sleeve and the upper end step in the outer sleeve, and the shaft core fixing sleeve oil seal and the shaft core oil seal are arranged at the same horizontal height.

[0008] A further arrangement of the present utility model is: the door closing force adjustment mechanism includes a longitudinal pressure-adjusting screw with an oil seal groove, the longitudinal pressure-adjusting screw is screwed into the longitudinal through hole from top to bottom, a transverse pin is provided in the pin groove, the lower end of the longitudinal pressure-adjusting screw abuts against the upper surface of the transverse pin, the outer surface of the shaft core is covered with a compression spring, the upper end of the compression spring abuts against the lower surface of the transverse pin exposed outside the shaft core.

[0009] The utility model is further configured as follows: the door closing speed adjustment mechanism includes a piston pin and a speed regulating oil core arranged in a spiral groove of the piston, both ends of the piston pin pass through the piston spiral groove and are exposed outside the piston, the end of the piston pin exposed outside the piston is fixed in a pin fixing hole arranged on the upper part of the piston sleeve, a tapered needle rod is provided at the upper end of the speed regulating oil core, the tapered needle rod passes through the speed regulating valve hole and extends into the inner cavity of the piston, the lower end of the speed regulating oil core rotates in the threaded hole in the middle part of the piston sleeve, the cavity between the lower end face of the piston and the upper end face of the threaded hole of the piston sleeve is a pressurized oil chamber, and the cavity between the upper end face of the piston and the lower end face of the steel ball support ring is an oil storage chamber, and both the pressurized oil chamber and the oil storage chamber are filled with hydraulic oil.

[0010] A further configuration of the present invention is that a closed-door pressure relief groove is provided in the middle and lower sections of the inner wall of the piston sleeve.

[0011] The utility model has the above-mentioned features: 1. A pin is provided at the end of the shaft core instead of the teeth in the background technology, and a cross-shaped slot is provided in the piston to replace the tooth groove. The setting of the pin and the cross-shaped slot is convenient for processing and easy to control the processing accuracy, and the cooperation between the shaft core and the piston is smoother during actual operation; 2. When the shaft core rotates, it drives the transmission sleeve to rotate, and the transmission sleeve drives the hinge to rotate. The upper end of the shaft core is replaced by evenly distributed teeth from a flat shape, and its transmission mode of meshing with the transmission sleeve is more suitable for the operation mode of the hinge; 3. The use of external oil return of the oil cylinder makes the closing speed more stable and it is more convenient to adjust the closing speed.

[0012] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0014] Figure 2 This is a schematic structural diagram of the shaft core of an embodiment of the present utility model.

[0015] Figure 3 This is a top view of the piston according to an embodiment of the present utility model.

[0016] Figure 4 for Figure 3 Cross-sectional view of AA in the figure.

[0017] Figure 5 This is an expanded view of the piston according to an embodiment of the present utility model.

[0018] Figure 6 It is an exploded view of an embodiment of the present invention and the hinge.

[0019] Figure 7 This is an assembly diagram of an embodiment of the utility model and hinges. DETAILED DESCRIPTION

[0020] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0021] like Figure 1-7 The hinge core shaft shown in the figure comprises an axis core 1 and a piston 13 arranged in a piston sleeve 14. The axis core 1 is cylindrical as a whole, and a longitudinal through hole 208 is provided along the cylindrical axis of the axis core 1. The longitudinal through hole 208 is a threaded hole. A pin groove 207 is provided on the outer surface of the middle part of the axis core 1, which is longitudinally opened and passes through the middle part of the axis core 1. The pin groove 207 is connected to the longitudinal through hole 208. The outer surface of the axis core 1 is provided with an axis core oil seal groove 205 and a steel ball groove 206 from top to bottom. The axis core oil seal groove 205 and the steel ball groove 206 are both perpendicular to the cylindrical axis of the axis core 1. The piston 13 is also cylindrical as a whole, and two symmetrical piston spiral grooves 303 are provided on the outer surface of the middle part of the piston 13 and pass through the middle part of the piston 13. A piston oil seal groove 306 is provided on the outer surface of the lower part of the piston 13, and the piston oil seal groove 306 is perpendicular to the cylindrical axis of the piston 13. A one-way valve 24 is provided at the lower end of the piston 13, and a speed regulating valve is provided on the one-way valve 24 The valve hole, the speed regulating valve hole is connected to the inner cavity of the piston 13, the upper part of the shaft core 1 is sequentially covered with a shaft core fixing sleeve 6 and a steel ball support ring 10 from top to bottom, a needle bearing 4 is provided between the upper part of the shaft core fixing sleeve 6 and the shaft core 1, the steel ball 50 is provided in the steel ball groove 206, and is limited by the lower end of the shaft core fixing sleeve 6 and the upper end of the steel ball support ring 10, the shaft core oil seal groove 205 is provided with a shaft core oil seal 7, the shaft core fixing sleeve 6, the steel ball support ring 10, and the piston sleeve 14 are provided on the outer sleeve 5 The inner hole of the outer sleeve 5 is arranged along the axis of its length direction, the longitudinal through hole 208 is provided with a door closing force adjustment mechanism, the lower end of the piston 13 is provided with a door closing speed adjustment mechanism, the upper end of the shaft core 1 is a transmission part 202, and the lower end is provided with a necking part 203, the necking part 203 is a rectangular parallelepiped, and a pin 204 is inserted at the end thereof. A cross-shaped slot 301 adapted to the pin 204 is provided inside the piston 13, and the cross-shaped slot 301 is located above the one-way valve 24.

[0022] The outer surface of the transmission part 202 of the shaft core 1 is provided with a plurality of evenly distributed teeth 2021, and the outer sleeve 5 of the transmission part 202 is provided with a transmission sleeve 40 engaged therewith.

[0023] An inner side wall of the upper end of the inner hole of the outer sleeve 5 is provided with an inwardly concave upper step 51, and the steel ball support ring 10 is embedded in the lower table surface of the upper step 51. The shaft core fixing sleeve 6 is inserted into the inner hole of the outer sleeve 5 from top to bottom to press the steel ball support ring 10. A shaft core fixing sleeve oil seal 8 is provided between the shaft core fixing sleeve 6 and the upper end step 51 in the outer sleeve 5. The shaft core fixing sleeve oil seal 8 and the shaft core oil seal 7 are arranged at the same horizontal height.

[0024] The closing force adjustment mechanism includes a longitudinal pressure-adjusting screw 2 with an oil seal groove. The longitudinal pressure-adjusting screw 2 is screwed into the longitudinal through hole 208 from top to bottom. A transverse pin 11 is provided in the pin groove 207. The lower end of the longitudinal pressure-adjusting screw 2 abuts against the upper surface of the transverse pin 11. The outer surface of the shaft core 1 is provided with a compression spring 12. The upper end of the compression spring 12 abuts against the lower surface of the transverse pin 11 exposed outside the shaft core 1.

[0025] The closing speed adjustment mechanism includes a piston pin (not shown in the figure) provided in the piston spiral groove 303 and a speed regulating oil core 18. Both ends of the piston pin pass through the piston spiral groove 303 and are exposed outside the piston 13. The end of the piston pin exposed outside the piston 13 is fixed in a pin fixing hole 141 provided on the upper part of the piston sleeve 14. A tapered needle rod is provided at the upper end of the speed regulating oil core 18. The tapered needle rod passes through the speed regulating valve hole and extends into the inner cavity of the piston 13. The lower end of the speed regulating oil core 18 rotates in the threaded hole in the middle part of the piston sleeve 14. The cavity between the lower end surface of the piston 13 and the end of the piston sleeve threaded hole is the pressurized oil chamber 25, and the cavity between the upper end surface of the piston 13 and the lower end surface of the steel ball support ring 10 is the oil storage chamber 28. The pressurized oil chamber 25 and the oil storage chamber 28 are both filled with hydraulic oil. The middle and lower section of the inner wall of the piston sleeve 14 is provided with a closing door pressure relief groove 23.

[0026] The outer sleeve 5 is sleeved in the inner holes of the upper and lower hinges 401 and 402, and the upper end part of the outer sleeve 5 can rotate freely in the inner hole of the upper hinge 401. The outside of the transmission sleeve is also provided with teeth, which press on the inner sides of the upper and lower hinges. When the user opens the door, the upper hinge is driven to rotate, and the shaft core is driven to rotate through the transmission sleeve. When the shaft core rotates, the pin shaft cooperates with the cross-shaped slot of the piston, so that only rotational torque is transmitted between the piston and the shaft core, and the shaft core drives the piston to rotate. During the rotation of the piston, the two symmetrical spiral grooves of the column body and the sliding action of the piston pin that crosses the spiral groove and is sleeved on the two symmetrical pin holes on the upper part of the piston sleeve column body make the piston move axially upward along the spiral bevel during the rotation process, compressing the pressure spring to store energy. For details of the working principle, please refer to the invention patent application number CN201110185930.5.

Claims

1. A hinge core shaft, comprising a shaft core and a piston arranged in a piston sleeve, the shaft core being cylindrical as a whole, and a longitudinal through hole being provided along the cylindrical axis of the shaft core, the longitudinal through hole being a threaded hole, and a pin groove being longitudinally opened and penetrating the middle of the shaft core being provided on the outer surface of the middle part of the shaft core, the pin groove being connected to the longitudinal through hole, a shaft core oil seal groove and a steel ball groove being provided on the outer surface of the shaft core from top to bottom, the shaft core oil seal groove and the steel ball groove being perpendicular to the cylindrical axis of the shaft core, the piston being cylindrical as a whole, and two symmetrical piston spiral grooves penetrating the middle part of the piston being provided on the outer surface of the middle part of the piston, a piston oil seal groove being provided on the outer surface of the lower part of the piston, the piston oil seal groove and the piston The cylindrical axis is vertical, a one-way valve is provided at the lower end of the piston, a speed regulating valve hole is provided on the one-way valve, the speed regulating valve hole is communicated with the inner cavity of the piston, the upper part of the shaft core is sequentially covered with a shaft core fixing sleeve and a steel ball support ring from top to bottom, a needle bearing is provided between the upper part of the shaft core fixing sleeve and the shaft core, the steel ball is provided in the steel ball groove and is limited by the lower end of the shaft core fixing sleeve and the upper end of the steel ball support ring, a shaft core oil seal is provided in the shaft core oil seal groove, the shaft core fixing sleeve, the steel ball support ring and the piston sleeve are provided in the inner hole of the outer sleeve, the inner hole of the outer sleeve is arranged along the axis of its length direction, a closing force adjustment mechanism is provided in the longitudinal through hole, and a closing speed adjustment mechanism is provided at the lower end of the piston, which is characterized in that: The upper end of the shaft core is the transmission part, and the lower end is provided with a neck portion, which is a rectangular parallelepiped with a pin at the end. A cross-shaped slot adapted to the pin is provided inside the piston, and the cross-shaped slot is located above the one-way valve.

2. The hinge core shaft according to claim 1, characterized in that: The outer surface of the transmission part of the shaft core is provided with a plurality of evenly distributed teeth, and the outer shell of the transmission part is provided with a transmission sleeve engaged with the transmission part.

3. The hinge core shaft according to claim 1, characterized in that: An inner side wall of the upper end of the inner hole of the outer sleeve is provided with an inwardly concave upper step, the steel ball support ring is embedded in the lower table surface of the upper step, the shaft core fixing sleeve is inserted into the inner hole of the outer sleeve from top to bottom to press the steel ball support ring, and a shaft core fixing sleeve oil seal is provided between the shaft core fixing sleeve and the upper end step in the outer sleeve, and the shaft core fixing sleeve oil seal and the shaft core oil seal are arranged at the same horizontal height.

4. A hinge core shaft according to claim 1, 2 or 3, characterized in that: The closing force adjustment mechanism includes a longitudinal pressure-adjusting screw with an oil seal groove. The longitudinal pressure-adjusting screw is screwed into the longitudinal through hole from top to bottom. A transverse pin is provided in the pin groove. The lower end of the longitudinal pressure-adjusting screw abuts against the upper surface of the transverse pin. The outer surface of the shaft core is provided with a compression spring, and the upper end of the compression spring abuts against the lower surface of the transverse pin exposed outside the shaft core.

5. A hinge core shaft according to claim 1, 2 or 3, characterized in that: The closing speed adjustment mechanism includes a piston pin and a speed regulating oil core arranged in the piston spiral groove. Both ends of the piston pin pass through the piston spiral groove and are exposed outside the piston. The end of the piston pin exposed outside the piston is fixed in a pin fixing hole arranged on the upper part of the piston sleeve. A tapered needle rod is provided at the upper end of the speed regulating oil core. The tapered needle rod passes through the speed regulating valve hole and extends into the inner cavity of the piston. The lower end of the speed regulating oil core rotates in the threaded hole in the middle of the piston sleeve. The cavity between the lower end face of the piston and the end of the threaded hole of the piston sleeve is a pressurized oil chamber, and the cavity between the upper end face of the piston and the lower end face of the steel ball support ring is an oil storage chamber. Both the pressurized oil chamber and the oil storage chamber are filled with hydraulic oil.

6. A hinge core shaft according to claim 1, 2 or 3, characterized in that: A closed-door pressure relief groove is provided in the middle and lower sections of the inner wall of the piston sleeve.

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