Door hinge device of water sump door of horizontal centrifuge

Abstract

A door hinge device of a water sump door of a horizontal centrifugal machine comprises two door hinge seats which are vertically aligned and respectively fixed on a water sump body, a door hinge pin shaft arranged on the two door hinge seats and a door hinge arm with the front end fixed with the water sump door, and the rear end of the door hinge arm extends between the two door hinge seats and is sleeved on the door hinge pin shaft in a clearance fit mode. The door hinge structure is characterized in that thrust ball bearings are pressed on the door hinge seats, the door hinge arm is clamped between the two thrust ball bearings, is separated from the door hinge seats and is not in contact with the door hinge seats, and the door hinge arm drives the thrust ball bearings to rotate along with opening and closing of the sump door. According to the utility model, the rotation smoothness of the door hinge arm is ensured, the clamping stagnation of the door hinge arm in the rotation process is avoided, and the water sump door can be flexibly opened and closed without clamping stagnation; sinking of the water sump door caused by matching of the door hinge arm and the door hinge pin shaft is avoided, the sinking amount of the water sump door is reduced, the labor intensity of screw hole position correction when the water sump door is closed is reduced, normal opening and closing of the water sump door are achieved, clamping stagnation is avoided, and the water sump door is small in sinking and easy to close.

Description

Technical Field

[0001] The utility model relates to a door hinge device for a water tank door of a horizontal centrifuge, belonging to the technical field of horizontal centrifuges. Background Art

[0002] Currently, when inspecting or replacing wearing parts on a horizontal centrifuge, the door and its feed pipe (collectively known as the sump door) need to be rotated left and right to open. The previous sump door hinge system consisted of a door shaft inserted into the inner hole of a copper sleeve in the capstan. The shaft seat and the capstan lug were welded to the door and capstan, respectively, during assembly. This structure and assembly method resulted in the sump door sinking during opening and closing due to the excessive clearance between the door shaft and the copper sleeve in the capstan. Furthermore, due to the excessive dry friction between the end faces of the copper sleeve and the capstan when the door rotated, the sump door often became stuck during opening and closing. When closing the door, the sinking of the sump door caused the bolt holes on the door body to become misaligned with the corresponding threaded holes on the sump body. Multiple operators were required to use levers and other tools to lift the door body and adjust the screw hole positions before installing the connecting bolts to reset the sump door.

[0003] In order to enable the sump door to be opened and closed flexibly without getting stuck and to reduce the sinking of the door body, it is necessary to improve the structure of the door hinge of the existing sump door. Utility Model Content

[0004] The door hinge device for the water tank door of a horizontal centrifuge provided by the utility model ensures the smooth rotation of the door hinge arm, avoids the door hinge arm from getting stuck during the rotation process, and enables the water tank door to be opened and closed flexibly without getting stuck; avoids the sinking of the water tank door caused by the cooperation between the door hinge arm and the door hinge pin shaft, reduces the sinking amount of the water tank door, and reduces the labor intensity of correcting the position of the screw hole when closing the water tank door, so that the water tank door can be opened and closed normally without getting stuck, and the sinking is small and easy to close.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The door hinge device of the water tank door of a horizontal centrifuge includes two door hinge seats that are vertically aligned and fixed to the water tank body respectively, a door hinge pin shaft installed on the two door hinge seats, and a door hinge arm whose front end is fixed to the water tank door. The rear end of the door hinge arm extends between the two door hinge seats and is loosely fitted on the door hinge pin shaft. It is characterized in that: thrust ball bearings are press-fitted on the door hinge seats, the door hinge arm is clamped between the two thrust ball bearings and separated from the door hinge seats without contact, and the door hinge arm drives the thrust ball bearing to rotate as the water tank door is opened and closed.

[0007] Preferably, a through hole is provided on the door hinge seat for the door hinge pin shaft to pass through. The through hole is a T-shaped reducing hole with a stepped surface. The outer end cover of the thrust ball bearing is interference pressed into the large end of the through hole, and the inner end cover is pressed tightly on the door hinge arm. The door hinge pin shaft passes through the thrust ball bearing with clearance fit and comes out of the through hole.

[0008] Preferably, the door hinge pin includes a pin body and a connecting block integrally formed at the upper end of the pin body, the connecting block rests on one door hinge seat, and the lower end of the pin body extends from the other door hinge seat and is assembled with a nut and a gasket.

[0009] Preferably, an oil cup is installed on the connecting block, and an oil guide channel is provided on the pin body for guiding the oil in the oil cup into the two thrust ball bearings respectively.

[0010] Preferably, a dust ring is provided between the door hinge seat and the door hinge arm and is sleeved outside the thrust ball bearing.

[0011] Preferably, a nylon bearing is press-fitted into the inner hole at the rear end of the door hinge arm, and the nylon bearing is clearance-matched with the door hinge pin shaft.

[0012] The beneficial effects of the utility model are:

[0013] The utility model discloses a door hinge device for a horizontal centrifuge water tank door. The door hinge seat is press-fitted with a thrust ball bearing. The door hinge arm is pressed between the two thrust ball bearings. When the water tank door is opened or closed, the door hinge arm rotates on the door hinge pin shaft. The door hinge arm drives the two thrust ball bearings to rotate synchronously. The door hinge seat and the door hinge arm are separated by the thrust ball bearing to avoid direct sliding friction between the door hinge arm and the door hinge seat during the rotation process. When the door hinge arm drives the thrust ball bearing to move, the rolling friction between the steel ball in the thrust ball bearing and the end cover replaces the door hinge arm and the door hinge seat in the existing structure. The sliding friction of the door hinge seat ensures the smooth rotation of the door hinge arm, avoids the door hinge arm from getting stuck during the rotation process, and enables the sump door to be opened and closed flexibly without getting stuck; the two thrust ball bearings clamp the door hinge arm to form a support for the door hinge pin, preventing the door hinge arm from tilting downward due to the clearance between the door hinge arm and the door hinge pin shaft, thereby avoiding the sinking of the sump door caused by the fit between the door hinge arm and the door hinge pin shaft, reducing the amount of sinking of the sump door, and reducing the labor intensity of correcting the screw hole position when closing the sump door, so that the sump door can be opened and closed normally without getting stuck, and it can be easily closed with little sinking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the hinge device of the water tank door of a horizontal centrifuge according to the present invention.

[0015] Figure 2 This is a cross-sectional view of the door hinge seat.

[0016] Figure 3 This is a schematic diagram of the horizontal centrifuge water tank door hinge device connecting the water tank door and the water tank body.

[0017] Figure 4 for Figure 3 side view. DETAILED DESCRIPTION

[0018] The following combination Figures 1 to 4The embodiments of the present utility model are described in detail.

[0019] The door hinge device of the water tank door of a horizontal centrifuge includes two door hinge seats 1 that are vertically aligned and respectively fixed on the water tank body 100, a door hinge pin shaft 2 installed on the two door hinge seats 1, and a door hinge arm 3 whose front end is fixed to the water tank door 101. The rear end of the door hinge arm 3 extends between the two door hinge seats 1 and is loosely fitted on the door hinge pin shaft 2. It is characterized in that: thrust ball bearings 4 are press-fitted on the door hinge seats 1, and the door hinge arm 3 is clamped between the two thrust ball bearings 4 and separated from the door hinge seat 1 without contact. The door hinge arm 3 drives the thrust ball bearing 4 to rotate as the water tank door 101 is opened and closed.

[0020] The above-mentioned horizontal centrifuge water tank door hinge device is press-fitted with a thrust ball bearing 4 on the door hinge seat 1, and the door hinge arm 3 is pressed between the two thrust ball bearings 4. When the water tank door is opened or closed, the door hinge arm 3 rotates on the door hinge pin 2, and the door hinge arm 3 drives the two thrust ball bearings 4 to rotate synchronously. The thrust ball bearing 4 is used to separate the door hinge seat 1 and the door hinge arm 3 to avoid sliding friction between the door hinge arm 3 and the door hinge seat 1 during rotation. When the door hinge arm 3 drives the thrust ball bearing 4 to move, the rolling friction between the steel ball in the thrust ball bearing and the end cover replaces the door in the existing structure. The sliding friction between the hinge arm and the door hinge seat ensures the smooth rotation of the door hinge arm, avoids the door hinge arm 3 from getting stuck during the rotation process, and enables the sump door to be opened and closed flexibly without getting stuck; the two thrust ball bearings 4 clamp the door hinge arm 3 to form a support for the door hinge pin 3, preventing the door hinge arm 3 from tilting downward due to the clearance fit with the door hinge pin shaft 2, thereby avoiding the sinking of the sump door caused by the fit between the door hinge arm 3 and the door hinge pin shaft 2, reducing the amount of sinking of the sump door, and reducing the labor intensity of correcting the screw hole position when the sump door is closed, so that the sump door can be opened and closed normally without getting stuck, and it can be easily closed with little sinking.

[0021] Among them, the door hinge seat 1 is provided with a through hole 11 for the door hinge pin shaft 2 to pass through. The through hole 11 is a T-shaped reducing hole with a stepped surface. The outer end cover of the thrust ball bearing 4 is interference pressed into the large end of the through hole 11, and the inner end cover is pressed tightly on the door hinge arm 3. The door hinge pin shaft 2 passes through the thrust ball bearing 4 with a clearance fit and passes out from the through hole 11. As shown in the accompanying drawings, the longitudinal section of the through hole 11 is T-shaped, and the outer end cover of the thrust ball bearing 4 is interference fit and pressed into the larger end of the through hole 11 with a larger diameter. The inner end cover of the thrust ball bearing 4 extends out of the through hole 11 and is pressed tightly on the door hinge pin 2. When the water tank door 101 is opened and closed, the door hinge arm 3 rotates around the door hinge pin 2, driving the inner end cover of the thrust ball bearing 4 to rotate on the steel ball in the thrust ball bearing 4, forming the movement of the thrust ball bearing 4. The inner end cover of the thrust ball bearing 4 and the steel ball form rolling friction, the friction resistance is small, and the movement of the thrust ball bearing 4 is smooth, so that the door hinge arm 3 rotates smoothly without getting stuck, and the water tank door can be opened and closed normally without getting stuck.

[0022] The door hinge pin 2 comprises a pin body 21 and a connecting block 22 integrally formed at the upper end of the pin body 21. The connecting block 22 rests on one door hinge seat 1, while the lower end of the pin body 21 extends from the other door hinge seat 1 and is assembled with a nut and a washer. The nut and washer assembled at the lower end of the pin body 21 press against the end face of the lower door hinge seat 1. The nut at the lower end of the pin body 21 secures the door hinge pin 2 to the two door hinge seats 1. The tightening of the nut applies a certain axial force to the thrust ball bearing 4, ensuring that the inner end cap of the thrust ball bearing 4 presses against the door hinge arm 3.

[0023] An oil cup 23 is mounted on the connecting block 22, and an oil guide channel 24 is formed on the pin body 21 to guide the oil in the oil cup 23 to the two thrust ball bearings 4. Oil is introduced into the thrust ball bearings 4 through the oil cup 23 and the oil guide channel 24 to lubricate them, reducing wear on the thrust ball bearings and extending their service life.

[0024] A dust ring 5 is positioned between the door hinge base 1 and the door hinge arm 3, extending the thrust ball bearing 4. This dust ring 5 protects the thrust ball bearing 4, preventing dust from entering and extending its service life. The thickness of the dust ring 5 is slightly smaller than the distance between the door hinge base 1 and the door hinge arm 3, so as not to interfere with the rotation of the door hinge arm 3.

[0025] A nylon bearing is press-fitted into the inner hole at the rear end of the hinge arm 3, and the nylon bearing has a clearance fit with the hinge pin 2. The nylon bearing is self-lubricating, further improving the smoothness of the rotation of the hinge arm 3 on the hinge pin 2 and reducing wear on the hinge pin 2 and the hinge arm 3.

[0026] The above is a complete description of the technical solutions of the embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the embodiments described are only part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

Claims

1. A door hinge device for a horizontal centrifuge water tank door, comprising two vertically aligned door hinge seats, each fixed to the water tank body; a door hinge pin mounted on the two door hinge seats; and a door hinge arm with its front end fixed to the water tank door. The rear end of the door hinge arm extends between the two door hinge seats and is loosely fitted around the door hinge pin. The device is characterized by: The door hinge seat is press-fitted with thrust ball bearings, the door hinge arm is clamped between the two thrust ball bearings and is separated from the door hinge seat without contact, and the door hinge arm drives the thrust ball bearings to rotate as the sump door is opened and closed.

2. The hinge device for the water tank door of a horizontal centrifuge according to claim 1, characterized in that: The door hinge seat is provided with a through hole for the door hinge pin shaft to pass through. The through hole is a T-shaped reducing hole with a stepped surface. The outer end cover of the thrust ball bearing is interference pressed into the large end of the through hole, and the inner end cover is pressed tightly on the door hinge arm. The door hinge pin shaft passes through the thrust ball bearing with a clearance fit and passes out from the through hole.

3. The hinge device for the water tank door of a horizontal centrifuge according to claim 2, characterized in that: The door hinge pin includes a pin body and a connecting block integrally formed on the upper end of the pin body. The connecting block rests on one door hinge seat, and the lower end of the pin body extends from the other door hinge seat and is assembled with a nut and a gasket.

4. The hinge device for the water tank door of a horizontal centrifuge according to claim 3, characterized in that: An oil cup is installed on the connecting block, and an oil guide channel is provided on the pin body for respectively guiding the oil in the oil cup to the two thrust ball bearings.

5. The hinge device for the water tank door of a horizontal centrifuge according to claim 3, characterized in that: A dustproof ring is arranged between the door hinge seat and the door hinge arm and is sleeved on the outside of the thrust ball bearing.

6. The hinge device for the water tank door of a horizontal centrifuge according to claim 1, characterized in that: A nylon bearing is press-fitted into the inner hole at the rear end of the door hinge arm, and the nylon bearing is clearance-matched with the door hinge pin shaft.

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