Improved structure of door hinge

Abstract

The utility model relates to the technical field of door hinges, and discloses an improved structure of a door hinge, which comprises a connecting shaft, the connecting shaft is sleeved with a first hinge seat and a second hinge seat. A plurality of groups of connecting bolts are fixedly mounted on one side of the first hinge seat and one side of the second hinge seat; and bearing seats are installed on the positions, located at hinge sleeves of the first hinge seat and the second hinge seat, of the surface of the connecting shaft, sleeve shells are fixedly installed on the outer rotating surfaces of the bearing seats, and the length of the sleeve shells is larger than that of the bearing seats, according to the improved structure of the door hinge, under cooperation of the bearing seats, the sleeve shells and the connecting pieces, the friction coefficient is effectively reduced, and the service life of the door hinge is prolonged. Compared with the prior art, abrasion is reduced, so that the service life of the hinge is remarkably prolonged, the opening and closing smoothness of a door leaf is remarkably improved, compared with interference assembly installation, later disassembly and assembly are more convenient through arrangement of the connecting piece, the actual use requirement is met, the risk of material fatigue or damage is avoided, and the stability and reliability of the hinge are ensured.

Description

Technical Field

[0001] This utility model relates to the field of door hinge technology, specifically an improved door hinge structure. Background Technology

[0002] Door hinges are an indispensable hardware component in door and window systems. Their main function is to connect the door leaf and the door frame, allowing the door leaf to rotate around the hinge axis to open or close. Traditional door hinge structures mainly include a hinge base, a hinge axis, and a hinge cover.

[0003] During prolonged use, friction between the hinge shaft and the hinge seat of the door hinge can lead to wear, which in turn affects the service life of the hinge and the smoothness of the door opening and closing. In addition, the existing hinge seat and hinge shaft are assembled by interference fit with bearings. During the interference fit process, high stress may be generated between the bearing and the journal, which may lead to material fatigue or damage. Moreover, it is inconvenient to disassemble later. Therefore, we propose an improved door hinge structure to solve the above-mentioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an improved door hinge structure, which solves the problems of wear caused by friction between the hinge shaft and the hinge seat, thus affecting the service life of the hinge and the smoothness of the door opening and closing, as well as the interference fit between the hinge seat and the hinge shaft via bearings, which may generate high stress between the bearing and the journal during the interference fit process, potentially leading to material fatigue or damage, and making disassembly inconvenient later.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an improved door hinge structure, including a connecting shaft;

[0006] The connecting shaft is respectively fitted with a first hinge seat and a second hinge seat;

[0007] Multiple sets of connecting bolts are fixedly installed on one side of both the first hinge seat and the second hinge seat.

[0008] The surface of the connecting shaft is equipped with bearing seats at the hinge sleeves of the first and second hinge seats. A sleeve is fixedly installed on the outer rotating surface of the bearing seat, and the length of the sleeve is greater than the length of the bearing seat.

[0009] A connector is installed between the connecting shaft and the housing, and the connector is used to connect and lock the first hinge seat and the second hinge seat to the corresponding housing respectively.

[0010] Preferably, the connector includes symmetrically arranged card seats on the housing, each card seat consisting of a U-shaped seat and a conical block. The surface of the housing is provided with a moving hole that matches the U-shaped seat, and a spring is fixedly installed between the U-shaped seat and the housing.

[0011] A frustoconical sleeve is fitted on the outside of the connecting shaft near the housing. A threaded pin is provided inside the connecting shaft. The bottom end of the connecting shaft is sealed, and the top end is open. A round hole is opened at the bottom of the connecting shaft. One end of the threaded pin passes through the round hole at the bottom end of the connecting shaft and is threadedly connected to a nut at the bottom end of the connecting shaft. The frustoconical sleeve is fixedly connected by a straight rod and the threaded pin. The inner walls of the hinge sleeves of the first and second hinge seats are provided with locking grooves that are adapted to the card seat.

[0012] Preferably, a cap plate is fixed to the top of the threaded pin to seal the open end of the connecting shaft.

[0013] Preferably, the surface of the threaded pin has symmetrically arranged slots, and when the threaded pin drives the frustum sleeve to move up and down through the straight rod, the straight rod moves within the slots of the connecting shaft.

[0014] Preferably, one end of the card holder is provided with an installation groove, and a ball bearing is installed in the installation groove, the ball bearing rolling in the installation groove at one end of the card holder.

[0015] Preferably, a push rod is provided below the casing, the push rod is fixedly connected to a threaded pin, and the push rod can move within the slot opened in the threaded pin.

[0016] Beneficial effects

[0017] This utility model provides an improved door hinge structure. Compared with the prior art, it has the following advantages:

[0018] The improved hinge structure, through the cooperation of bearing housing, sleeve and connector, effectively reduces the coefficient of friction and wear, thereby significantly improving the service life of the hinge and the smoothness of the door opening and closing. Moreover, the connector design makes disassembly and assembly more convenient than interference fit installation, meeting actual use needs and avoiding the risk of material fatigue or damage, thus ensuring the stability and reliability of the hinge. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a rear view of the overall structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the first hinge seat and the second hinge seat of this utility model separated;

[0022] Figure 4 This is a partial sectional view of the overall structure of this utility model;

[0023] Figure 5 This utility model Figure 4 A magnified structural diagram at point A.

[0024] In the diagram: 101, First hinge seat; 102, Second hinge seat; 103, Connecting bolt; 104, Connecting shaft; 105, Bearing seat; 106, Sleeve; 2, Connecting part; 201, Threaded pin; 202, Nut; 203, Frustum sleeve; 204, Card seat; 205, Locking groove; 206, Ball; 207, Spring; 208, Push rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1-5 As shown:

[0027] An improved door hinge structure includes a connecting shaft 104;

[0028] A first hinge seat 101 and a second hinge seat 102 are respectively sleeved on the connecting shaft 104;

[0029] Multiple sets of connecting bolts 103 are fixedly installed on one side of both the first hinge seat 101 and the second hinge seat 102.

[0030] Bearing seats 105 are installed on the surface of the connecting shaft 104 at the hinge sleeves of the first hinge seat 101 and the second hinge seat 102. A sleeve 106 is fixedly installed on the outer rotating surface of the bearing seat 105, and the length of the sleeve 106 is greater than the length of the bearing seat 105.

[0031] A connector 2 is installed between the connecting shaft 104 and the housing 106. The connector 2 is used to connect and lock the first hinge seat 101 and the second hinge seat 102 to the corresponding housing 106 respectively.

[0032] The connector 2 includes a symmetrically arranged card seat 204 on the housing 106. The card seat 204 is composed of a U-shaped seat and a conical block. The surface of the housing 106 is provided with a moving hole that matches the U-shaped seat. A spring 207 is fixedly installed between the U-shaped seat and the housing 106.

[0033] A frustoconical sleeve 203 is fitted on the outside of the connecting shaft 104 near the sleeve 106. A threaded pin 201 is provided inside the connecting shaft 104. The bottom end of the connecting shaft 104 is sealed and the top end is open. A round hole is opened at the bottom of the connecting shaft 104. One end of the threaded pin 201 passes through the round hole at the bottom end of the connecting shaft 104 and is threadedly connected to the nut 202 at the bottom end of the connecting shaft 104. The frustoconical sleeve 203 is fixedly connected by a straight rod and the threaded pin 201. The inner walls of the hinge sleeves of the first hinge seat 101 and the second hinge seat 102 are provided with locking grooves 205 that are adapted to the card seat 204.

[0034] A cap plate is fixed to the top of the threaded pin 201 to seal the open end of the connecting shaft 104;

[0035] The threaded pin 201 has symmetrically arranged slots on its surface. When the threaded pin 201 drives the frustum sleeve 203 to move up and down through the straight rod, the straight rod moves within the slots on the connecting shaft 104.

[0036] One end of the card holder 204 is provided with an installation groove, and a ball bearing 206 is installed in the installation groove. The ball bearing 206 rolls in the installation groove at one end of the card holder 204.

[0037] A push rod 208 is provided below the housing 106. The push rod 208 is fixedly connected to the threaded pin 201. The push rod 208 can move within the slot opened in the threaded pin 201.

[0038] In this embodiment: the door hinge has an improved structure, and in use, the hinge sleeves of the first hinge seat 101 and the second hinge seat 102 are fitted onto the connecting shaft 104.

[0039] Both the first hinge seat 101 and the second hinge seat 102 are equipped with connecting bolts 103. The connecting bolts 103 on the first hinge seat 101 pass through the mounting holes of the door frame and are connected with nuts. At the same time, the connecting bolts 103 on the second hinge seat 102 pass through the mounting holes of the door and are connected with nuts, thereby realizing the hinge function of the door.

[0040] Before the first hinge seat 101 and the connecting bolt 103 are fitted, the threaded pin 201 is pulled up and the connecting shaft 104 is held by hand. The threaded pin 201 then drives the push rod 208 to move up. When the push rod 208 contacts the corresponding sleeve 106, the resulting squeezing force can effectively reduce the rotation of the sleeve 106 on the bearing seat 105, thereby facilitating the temporary locking of the retainer 204 on the sleeve 106.

[0041] When the first hinge seat 101 and the second hinge seat 102 are inserted, and when the connecting shaft 104 is matched with the second hinge seat 102 and the connecting bolt 103, the locking slot 204 corresponds to the locking groove 205 opened on the inner wall of the hinge sleeve of the first hinge seat 101 and the second hinge seat 102. Then, hold the connecting shaft 104 and push the threaded pin 201 down so that the threaded pin 201 passes through the round hole at the bottom of the connecting shaft 104 and is screwed and locked with the nut 202 at the bottom of the connecting shaft 104.

[0042] like Figure 4-5 As shown: When the threaded pin 201 moves down, it slides in the slot through the straight rod and drives the frustum sleeve 203 to move down synchronously. The frustum sleeve 203 has a frustum structure design. As the frustum sleeve 203 moves down, it presses the card seat 204. At this time, the card seat 204 presses the spring 207, causing the card seat 204 to move laterally and insert into the locking groove 205, thereby completing the connection, limiting and locking of the first hinge seat 101 and the second hinge seat 102 with the corresponding sleeve 106.

[0043] When the first hinge seat 101 and the second hinge seat 102 rotate, the retainer 204 drives the housing 106 to rotate. The housing 106 rotates through the bearing seat 105, which can reduce friction to a certain extent. At the same time, a ball bearing 206 is provided at one end of the retainer 204. When the housing 106 rotates, the retainer 204 rotates together. At this time, the ball bearing 206 at one end of the retainer 204 can slide on the surface of the frustum sleeve 203, thereby reducing the friction between the retainer 204 and the frustum sleeve 203. Although the frustum sleeve 203 squeezes the retainer 204, the retainer 204 still rotates more smoothly.

[0044] The card holder 204 is composed of a U-shaped seat and a conical block. The design of the conical block makes the diameter of one end smaller than the diameter of the locking groove 205, which makes it easier for the card holder 204 to be better inserted into the locking groove 205.

[0045] When disassembling the first hinge seat 101 and the second hinge seat 102, the nut 202 is disengaged from the threaded pin 201, and the threaded pin 201 is pulled up. At this time, the driving cone sleeve 203 releases the pressure on the retaining seat 204, and the spring 207 in the compressed state rebounds, driving the retaining seat 204 to disengage from the corresponding first hinge seat 101 and second hinge seat 102. The first hinge seat 101 and the second hinge seat 102 can then be pulled out to complete the disassembly.

[0046] This solution, with the cooperation of bearing seat 105, sleeve 106 and connector 2, effectively reduces the coefficient of friction and wear, thereby significantly improving the service life of the hinge and the smoothness of the door opening and closing. Moreover, the connector 2 makes subsequent disassembly and assembly more convenient compared to interference fit installation, meeting actual use needs and avoiding the risk of material fatigue or damage, thus ensuring the stability and reliability of the hinge.

[0047] The working principle and usage process of this utility model: The door hinge has an improved structure. In use, the hinge sleeves of the first hinge seat 101 and the second hinge seat 102 are fitted onto the connecting shaft 104. Before the first hinge seat 101 and the connecting bolt 103 are fitted, the threaded pin 201 is pulled upwards while the connecting shaft 104 is held. The threaded pin 201 then drives the push rod 208 upwards. When the push rod 208 contacts the corresponding housing 106, the resulting pressure temporarily locks the retaining seat 204 on the housing 106. When the first hinge seat 101 and the second hinge seat 102... After insertion, when the connecting shaft 104 corresponds and fits with the second hinge seat 102 and the connecting bolt 103, the locking groove 205 of the locking sleeve of the retaining seat 204 corresponds to the locking groove 205 of the hinge sleeve of the first hinge seat 101 and the second hinge seat 102. Then, hold the connecting shaft 104 and push the threaded pin 201 down, so that the threaded pin 201 passes through the round hole at the bottom of the connecting shaft 104 and is screwed and locked with the nut 202 at the bottom of the connecting shaft 104. At the same time as the threaded pin 201 moves down, the straight rod slides in the strip-shaped opening, and drives the frustum sleeve 203 to move down synchronously. The device features a frustum-shaped structure. As the frustum sleeve 203 moves downward, it compresses the retaining seat 204. This compresses the retaining seat 204 against the spring 207, causing it to move laterally and engage with the locking groove 205. This completes the connection and locking of both the first hinge seat 101 and the second hinge seat 102 with their corresponding housings 106. One end of the retaining seat 204 is equipped with a ball bearing 206. As the housing 106 rotates, the retaining seat 204 rotates simultaneously. The ball bearing 206 at one end of the retaining seat 204 can slide on the surface of the frustum sleeve 203, thereby reducing the risk of jamming. The friction between seat 204 and frustoconical sleeve 203 causes the seat 204 to rotate more smoothly, even though the frustoconical sleeve 203 presses against the seat 204. When disassembling the first hinge seat 101 and the second hinge seat 102, the nut 202 is disengaged from the threaded pin 201, and the threaded pin 201 is pulled up. At this time, the frustoconical sleeve 203 is released from pressing on the seat 204, and the spring 207 in the compressed state rebounds, driving the seat 204 to disengage from the corresponding first hinge seat 101 and second hinge seat 102. The first hinge seat 101 and the second hinge seat 102 can then be pulled out, completing the disassembly.

[0048] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. An improved door hinge structure, characterized in that, Includes connecting shaft (104); The connecting shaft (104) is respectively fitted with a first hinge seat (101) and a second hinge seat (102); Multiple sets of connecting bolts (103) are fixedly installed on one side of both the first hinge seat (101) and the second hinge seat (102); The surface of the connecting shaft (104) is equipped with bearing seats (105) at the hinge sleeves of the first hinge seat (101) and the second hinge seat (102). A sleeve (106) is fixedly installed on the outer rotating surface of the bearing seat (105). The length of the sleeve (106) is greater than the length of the bearing seat (105). A connector (2) is installed between the connecting shaft (104) and the housing (106). The connector (2) is used to connect and lock the first hinge seat (101) and the second hinge seat (102) to the corresponding housing (106).

2. The improved door hinge structure according to claim 1, characterized in that: The connector (2) includes a card holder (204) arranged symmetrically on the housing (106). The card holder (204) is composed of a U-shaped seat and a conical block. The surface of the housing (106) is provided with a moving hole that matches the U-shaped seat. A spring (207) is fixedly installed between the U-shaped seat and the housing (106). A frustoconical sleeve (203) is fitted on the outside of the connecting shaft (104) near the sleeve (106). A threaded pin (201) is provided inside the connecting shaft (104). The bottom end of the connecting shaft (104) is sealed and the top end is open. A round hole is opened at the bottom of the connecting shaft (104). One end of the threaded pin (201) passes through the round hole at the bottom end of the connecting shaft (104) and is threadedly connected to the nut (202) at the bottom end of the connecting shaft (104). The frustoconical sleeve (203) is fixedly connected by a straight rod and the threaded pin (201). The inner walls of the hinge sleeves of the first hinge seat (101) and the second hinge seat (102) are both provided with locking grooves (205) that are compatible with the card seat (204).

3. The improved door hinge structure according to claim 2, characterized in that: The top of the threaded pin (201) is fixed with a cap plate to seal the opening at the top of the connecting shaft (104).

4. The improved door hinge structure according to claim 2, characterized in that: The threaded pin (201) has symmetrically arranged slots on its surface. When the threaded pin (201) drives the frustum sleeve (203) to move up and down through the straight rod, the straight rod moves within the slots opened in the connecting shaft (104).

5. The improved door hinge structure according to claim 4, characterized in that: The card holder (204) has an installation groove at one end, and a ball bearing (206) is installed in the installation groove. The ball bearing (206) rolls in the installation groove at one end of the card holder (204).

6. The improved door hinge structure according to claim 5, characterized in that: A push rod (208) is provided below the casing (106). The push rod (208) is fixedly connected to the threaded pin (201). The push rod (208) can move within the slot opened in the threaded pin (201).

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