Lower door shaft positioning mechanism
By introducing positioning components and multiple sets of positioning grooves into the lower door shaft positioning mechanism, the preset angle locking positioning of the door body is achieved by using elastic connections, which solves the problem of door opening unstable caused by single bearing guidance, and improves lubricating and waterproofing performance .
Patent Information
- Application Number
- CN202323522183.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-23
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-12-23
AI Technical Summary
The existing lower door shaft positioning mechanism uses single bearing guide, lacking the angular stop function, which makes it easy to over-open or not close when the door is opened.
A lower door shaft positioning mechanism including a transmission shaft, a bearing seat and a positioning assembly is designed. By setting multiple sets of positioning grooves and positioning balls at the bottom of the transmission shaft, elastic parts are used to achieve elastic connection and clamping of the positioning balls to ensure the door body. Lock positioning at preset angle.
It effectively solves the problem of unstable angle when the door is opened, ensures the accurate positioning of the door body at preset angles such as 0° or 90°, and improves lubricating and waterproofing performance through oil injection channels and seals, reducing maintenance difficulty.
Smart Images
Figure CN222207591U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of door shaft positioning, in particular to a lower door shaft positioning mechanism. Background Art
[0002] During the installation of the mechanical structure of a large steel door or an elephant door, it is often necessary to rotate the lower door shaft at the bottom of the door body and install it in a positioning mechanism. The positioning mechanism positions the rotation of the lower door shaft to improve the stability of the door body rotation.
[0003] The existing lower door shaft positioning mechanism is usually guided by a single bearing and has no angle stop function, so the door is easily opened too far or not closed properly when opened. Utility Model Content
[0004] The utility model aims to provide a lower door shaft positioning mechanism, which solves the problem that the existing lower door shaft positioning mechanism usually uses a single bearing guide and has no angle stop function, so the door is easily opened too far or not closed properly when opened.
[0005] To achieve the above-mentioned purpose, the utility model provides a lower door shaft positioning mechanism, including a transmission shaft and a bearing seat, the transmission shaft is rotatably installed in a rotating cavity arranged in the bearing seat, the upper end of the transmission shaft is fixedly connected to the door body, a plurality of groups of mounting bearings are installed in the bearing seat, and the plurality of groups of mounting bearings are rotatably connected to the transmission shaft, a plurality of groups of oil filling channels are arranged in the transmission shaft, and the oil filling port of the oil filling channel is arranged on the upper part of the transmission shaft, a sealing member is provided at the top of the bearing seat, a bearing base plate is installed at the bottom of the bearing seat, and the bearing base plate is fixedly connected to the bottom of the bearing seat through a plurality of groups of fixing members, and a positioning component for positioning the transmission shaft is installed at the bottom of the rotating cavity, and the positioning component includes two groups of positioning balls, the positioning balls are slidably connected to the limiting holes opened at the bottom of the bearing seat, and are elastically connected to the bottom of the limiting holes through elastic members, the elastic members are used to provide elastic force for the positioning balls to slide up, and a plurality of groups of positioning grooves for clamping the positioning balls are provided at the bottom of the transmission shaft.
[0006] As a further solution of the utility model, a waterproof box body is sleeved on the outer side of the bearing seat, and multiple sets of positioning bolts are rotatably mounted on the inner wall of the waterproof box body, and one end of the positioning bolts abuts against the outer wall of the bearing seat.
[0007] As a further solution of the utility model, the number of the mounting bearings is two groups, and elastic retaining rings are correspondingly installed on the upper end surfaces of the two groups of mounting bearings.
[0008] As a further solution of the utility model, the sealing member is an oil seal, and a connecting hole is provided at the center of the oil seal for the transmission shaft to pass through.
[0009] As a further solution of the utility model, the fixing member is a screw, and the bearing base plate is provided with a mounting hole for mounting the screw.
[0010] As a further solution of the utility model, the elastic member is a cylindrical helical compression spring, and the top and bottom of the cylindrical helical compression spring are respectively connected to the positioning ball and the adjusting set screw of the threaded hole at the bottom of the bearing seat.
[0011] Compared with the prior art, the utility model provides a positioning assembly, in which the positioning ball in the positioning assembly is clamped into the positioning groove to achieve locking and positioning of the drive shaft, thereby positioning the door body to a preset angle, solving the problem that the existing lower door shaft positioning mechanism usually uses a single bearing guide and has no angle stop function, which makes it easy for the door to be opened too far or not closed properly when opened. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The utility model provides a schematic diagram of the internal structure of a lower door shaft positioning mechanism.
[0013] Figure 2 A schematic diagram of the external structure of a lower door shaft positioning mechanism provided by the utility model
[0014] Figure 3 The utility model provides a top view of the installation of a lower door shaft positioning mechanism.
[0015] Figure 4 The utility model provides a schematic diagram of the installation of a lower door shaft positioning mechanism.
[0016] In the attached figure: 1. bearing seat; 2. transmission shaft; 201. oil filling port; 202. oil filling channel; 3. bearing base plate; 4. oil seal; 5. upper bearing; 6. lower bearing; 7. elastic retaining ring; 8. positioning ball; 9. cylindrical helical compression spring; 10. screw; 11. door body; 12. ground; 13. waterproof box body; 14. expansion bolt; 15. positioning bolt; 16. adjustment screw. DETAILED DESCRIPTION
[0017] The technical solution of the utility model is further described in detail below in conjunction with specific implementation methods.
[0018] like Figure 1 and Figure 2As shown, in an embodiment of the utility model, a lower door shaft positioning mechanism comprises a transmission shaft 2 and a bearing seat 1, wherein the transmission shaft 2 is rotatably mounted in a rotary cavity provided in the bearing seat 1, the upper end of the transmission shaft 2 is fixedly connected to the door body 11, a plurality of groups of mounting bearings are installed in the bearing seat 1, and the plurality of groups of mounting bearings are rotatably connected to the transmission shaft 2, a plurality of groups of oil injection channels 202 are arranged in the transmission shaft 2, and an oil injection port 201 of the oil injection channel 202 is arranged at the upper part of the transmission shaft 2, a sealing member is provided at the top of the bearing seat 1, a bearing base plate 3 is installed at the bottom of the bearing seat 1, and the bearing base plate 3 is fixedly connected to the bottom of the bearing seat 1 through a plurality of groups of fixing members, a positioning assembly for positioning the transmission shaft 2 is installed at the bottom of the rotary cavity, and the positioning assembly comprises two groups of positioning balls 8, the positioning balls 8 are slidably connected in the limiting holes provided at the bottom of the bearing seat 1, and are elastically connected to the bottom of the limiting holes through elastic members, and the elastic members are used to provide elastic force for the positioning balls 8 to slide upward, and a plurality of groups of positioning grooves for clamping the positioning balls 8 are provided at the bottom of the transmission shaft 2;
[0019] In the utility model, two groups of positioning grooves are provided at the bottom of the transmission shaft 2, and the two groups of positioning grooves are vertically arranged to respectively position and lock the door body 11 at 0° and 90°. Of course, in actual design, corresponding positioning grooves can be provided at the bottom of the transmission shaft 2 according to the angle of rotation and locking of the door body 11.
[0020] like Figure 3 and Figure 4 As shown, in the embodiment of the utility model, a waterproof box body 13 is provided on the outer side of the bearing seat 1, and the waterproof box body 13 is used to provide waterproof protection for the bearing seat 1. A plurality of sets of positioning bolts 15 are rotatably installed on the inner wall of the waterproof box body 13, and one end of the positioning bolts 15 abuts against the outer wall of the bearing seat 1. The bearing seat 1 is positioned and clamped by rotating the plurality of positioning bolts 15. In the utility model, a set of positioning bolts 15 are provided at the four corners of the waterproof box body 13. The four sets of positioning bolts 15 cooperate to fix the bearing seat 1. At the same time, the waterproof box body 13 is fixedly installed on the ground 12 by a plurality of expansion bolts 14.
[0021] like Figure 1 As shown, in the embodiment of the utility model, the number of the mounting bearings is two groups, and the two groups of the mounting bearings are divided into an upper bearing 5 and a lower bearing 6. The upper bearing 5 and the lower bearing 6 cooperate to achieve stable rotation of the transmission shaft 2. At the same time, elastic retaining rings 7 are correspondingly installed on the upper end surfaces of the two groups of the mounting bearings. The elastic retaining rings 7 are used to prevent the upper bearing 5 and the lower bearing 6 from being displaced and rotated along the axial direction of the transmission shaft 2, thereby improving the stability of the transmission between the mounting bearings and the transmission shaft 2.
[0022] like Figure 1As shown, in the embodiment of the utility model, the sealing member is an oil seal 4, and a connecting hole is provided in the center of the oil seal 4 for the transmission shaft 2 to pass through. In the utility model, maintenance personnel can inject lubricating oil from the oil filling port 201 on the top of the transmission shaft 2, and the lubricating oil enters the rotary cavity through the oil filling channel 202 in the transmission shaft 2 to lubricate the components in the rotary cavity. At the same time, the oil seal 4 can prevent the lubricating oil from escaping from the rotary cavity and causing environmental pollution.
[0023] like Figure 1 As shown, in the embodiment of the utility model, the fixing member is a screw 10, and the bearing base plate 3 is provided with a mounting hole for mounting the screw 10. The utility model fixes the bearing seat 1 and the bearing base plate 3 with multiple groups of screws 10.
[0024] like Figure 1 As shown, in the embodiment of the utility model, the elastic member is a cylindrical helical compression spring 9, and the top and bottom of the cylindrical helical compression spring 9 are respectively connected to the positioning ball 8 and the adjusting set screw 16 of the threaded hole at the bottom of the bearing seat 1. When the transmission shaft 2 rotates so that the bottom positioning groove is aligned with the positioning ball 8, the cylindrical helical compression spring 9 stretches and drives the positioning ball 8 to slide up and clamp into the positioning groove. When the door body 11 rotates further, the positioning ball 8 is squeezed into the limiting hole, and the cylindrical helical compression spring 9 is in a compressed state.
[0025] To sum up the above, the utility model sets a positioning component, and the positioning ball 8 in the positioning component is clamped to the positioning groove to realize the locking positioning of the drive shaft 2, so as to position the door body 11 to a preset angle, which solves the problem that the existing lower door shaft positioning mechanism usually uses a single bearing guide and has no angle stop function, and the door is easy to open too far or not close properly when opened. At the same time, when performing maintenance on it, the maintenance personnel can directly inject lubricating oil from the oil filling port 201 on the upper part of the drive shaft 2, which greatly reduces the difficulty of maintenance.
[0026] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.
Claims
1. A lower door shaft positioning mechanism, characterized in that: The cam is an axially-coupled device for translating rotation of the drive shaft into and out of the bearing housing, the cam being arranged on a rotationally-coupled surface and being arranged on a camshaft to move relative to the drive shaft.
2. A lower door shaft positioning mechanism according to claim 1, characterized in that: A waterproof box body is sleeved on the outer side of the bearing seat, and a plurality of sets of positioning bolts are rotatably mounted on the inner wall of the waterproof box body, and one end of the positioning bolts abuts against the outer wall of the bearing seat.
3. A lower door shaft positioning mechanism according to claim 1, characterized in that: The number of the mounting bearings is two groups, and elastic retaining rings are correspondingly installed on the upper end surfaces of the two groups of mounting bearings.
4. A lower door shaft positioning mechanism according to claim 1, characterized in that: The sealing member is an oil seal, and a connecting hole is provided at the center of the oil seal for the transmission shaft to pass through.
5. A lower door shaft positioning mechanism according to claim 1, characterized in that: The fixing member is a screw, and the bearing bottom plate is provided with a mounting hole for mounting the screw.
6. A lower door shaft positioning mechanism according to claim 1, characterized in that: The elastic member is a cylindrical helical compression spring, and the top and bottom of the cylindrical helical compression spring are respectively connected to the positioning ball and the adjusting set screw of the threaded hole at the bottom of the bearing seat.