Handle type speed reducer for railway tunnel protective door
By designing a handle reducer with a simple gear transmission structure and built-in lock assembly on the railway tunnel protective door, the problems of complex structure and external locks of the existing reducer are solved, and a protective door system with low cost, high performance and diverse structures are realized.
Patent Information
- Application Number
- CN202421696294.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-17
AI Technical Summary
The existing reducer used for protective doors has a complex structure and high cost, and the locks are not beautiful externally and have a single structure.
A handle reducer for railway tunnel protective doors is designed, and a simple gear transmission structure is adopted, and a lock assembly is built on the rotating rod, including a rotating lock core rod, a limit ball and a limit force body, realizing the built-in and diversified structure of the lock.
It realizes a reducer design with a simple structure and low cost, and enriches the structural form through built-in locks, improving the appearance aesthetics and overall performance of the product.
Smart Images
Figure CN222976600U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of protective doors, and particularly relates to a handle type speed reducer for a railway tunnel protective door. Background Art
[0002] At present, the speed reducers used for protective doors generally have a relatively complex structure. For example, planetary speed reducers or worm and worm gear speed reducers are adopted. The above speed reducers have relatively complex structures and relatively high costs, resulting in a relatively high overall product cost. Can a low-cost alternative structure be found? This is one of our research and development directions.
[0003] In addition, the locks on the protective door speed reducers are generally external type, which has the problems of being not beautiful and having a single structural form. How to develop a new structural form of lock is also one of our research and development directions. Summary of the Utility Model
[0004] The utility model provides a handle type speed reducer for a railway tunnel protective door, which can solve the problems pointed out in the background art.
[0005] A handle type speed reducer for a railway tunnel protective door includes a housing handle and a rotating rod. A small gear is connected to the rotating rod. The small gear is synchronously meshed with a first large gear and a second large gear. The first large gear and the second large gear are respectively meshed with a first rack and a second rack.
[0006] Preferably, the small gear is meshed with the second large gear through an idler wheel of the same specification as it, and the small gear is directly meshed with the first large gear.
[0007] Preferably, a lock assembly is provided on the rotating rod for locking the rotating rod.
[0008] Preferably, the lock assembly includes a rotating lock core rod coaxially arranged with the rotating rod and built in the rotating rod, a limiting ball and a limiting acting body. The lock core rod can rotate relative to the rotating rod. A reserved groove for cooperating with the limiting ball is provided on the lock core rod. A first limiting hole for cooperating with the limiting ball and corresponding to the reserved groove is provided at the corresponding position of the rotating rod. A second limiting hole corresponding to the first limiting hole is provided at the corresponding position of the housing. The limiting acting body is built in the first limiting hole, and it provides an acting force to stably position the limiting ball in the limiting position. The limiting ball reciprocates along the first limiting hole. When the limiting ball enters the reserved groove, the limiting ball disengages from the limiting position between the rotating rod and the housing, so that the rotating rod can rotate relative to the housing. When the lock core rod is rotated, the limiting ball is gradually extruded from the reserved groove and moves towards the second limiting hole under the limiting and guiding of the first limiting hole, and finally enters the limiting position between the rotating rod and the housing and is stably positioned by the limiting acting body.
[0009] Preferably, a rolling element is provided between the limiting force body and the limiting ball, the rotating rod 3 rotates relative to the housing, and the rolling element rolls smoothly between the limiting ball and the limiting ball.
[0010] Preferably, the rolling element is a ball.
[0011] Preferably, the limiting force body is an elastic compression body.
[0012] Preferably, the elastic compression body is a compression spring.
[0013] Preferably, a detachable plug is provided at the outer end of the second limiting hole, and the compression spring abuts against the plug.
[0014] Preferably, the plug is a screw.
[0015] Beneficial effects: The present utility model provides a handle type reducer for a railway tunnel protection door, which uses a simple gear transmission structure to realize the function of the protection door reducer, and has the advantages of simple structure, convenient production, and low cost;
[0016] In addition, a new structure form of the built-in lock structure is designed, which not only enriches the structure form of the market, but also effectively upgrades the overall appearance of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic internal structure diagram of the present utility model,
[0018] Figure 2 is a schematic external structure diagram of the present utility model,
[0019] Figure 3 is a schematic cross-sectional diagram of the present utility model,
[0020] Figure 4 is a schematic diagram of the open state of the lock assembly of the present utility model,
[0021] Figure 5 is a schematic diagram of the locked state of the lock assembly of the present utility model,
[0022] Description of the reference numerals in the drawings:
[0023] Reference numerals in the figures: housing 1; handle 2; rotating rod 3; pinion 4; first large gear 5; second large gear 6; first rack 7; second rack 8; idler gear 9; rotating lock core rod 31; limiting ball 32; limiting force body 33; reserved groove 34; first limiting hole 35; second limiting hole 36; key connection end 37; plug 38; rolling element 39. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] The following will describe in detail a specific embodiment of the present utility model in conjunction with the accompanying drawings. It should be understood that the protection scope of the present utility model is not limited by the specific embodiment.
[0025] Embodiment 1:
[0026] As Figure 1-2 shown, a hand-operated speed reducer for a railway tunnel protection door includes a housing 1, a handle 2, and a rotating rod 3. Both ends of the rotating rod 3 are connected to the handle 2. A small gear 4 is connected to the rotating rod 3. The small gear 4 is synchronously meshed with a first large gear 5 and a second large gear 6. The first large gear 5 and the second large gear 6 are respectively meshed with a first rack 7 and a second rack 8.
[0027] Specifically, the small gear 4 is meshed with the second large gear 6 through an idler gear 9 of the same specification as it. The small gear 4 is directly meshed with the first large gear 5 to achieve synchronous meshing, that is, the first large gear 5 and the second large gear 6 act synchronously.
[0028] Embodiment 2:
[0029] Combined with Figures 3-5 shown, a lock assembly is provided on the rotating rod 3 for locking the rotating rod 3.
[0030] Specifically, the lock assembly includes a rotating lock core rod 31 coaxially arranged inside the rotating rod 3, a limiting ball 32, and a limiting force body 33. The lock core rod 31 can rotate relative to the rotating rod 3. A reserved groove 34 for cooperating with the limiting ball 32 is provided on the lock core rod 31. A first limiting hole 35 for cooperating with the limiting ball 32 and corresponding to the reserved groove 34 is provided at the corresponding position of the rotating rod 3. A first mark can be set on the housing 1, or the key can be used as a mark, or a second mark can be provided on the lock core rod 31. When the first mark and the second mark are aligned, that is, when the reserved groove 34 and the first limiting hole 35 are aligned, a second limiting hole 36 corresponding to the first limiting hole 35 is provided at the corresponding position of the housing. Both the first limiting hole 35 and the second limiting hole 36 are perpendicular to the rotating rod 3 and the lock core rod 31. The limiting force body 33 is built in the first limiting hole 35, and it provides a force to stably position the limiting ball 32 at the limiting position. The limiting ball 32 reciprocates along the first limiting hole 35. When the limiting ball 32 enters the reserved groove 34, the limiting ball 32 disengages from the limiting position between the rotating rod 3 and the housing 1, enabling the rotating rod 3 to rotate relative to the housing 1. The reserved groove 34 is an arc groove, and its depth should not be too deep. The depth of the reserved groove 34 should be less than the radius of the limiting ball 32. If it is too deep, the limiting ball 32 will disengage from the limit of the first limiting hole 35, that is, it will not smoothly return to the first limiting hole 35. In addition, the sum of the depths of the reserved groove 34 and the first limiting hole 35 should be equivalent to the diameter of the limiting ball 32. If the diameter of the limiting ball 32 is too small compared to the sum of the depths, the lower end of the limiting force body 33 or the lower end of the rolling body 39 will be at the limiting position between the rotating rod 3 and the housing 1, which may cause jamming or unsmooth movement. If the diameter of the limiting ball 32 is too large compared to the sum of the depths, the limiting ball 32 will never disengage from the limiting position. When the rotating lock core rod 31 is rotated, the limiting ball 32 is gradually extruded from the reserved groove 34 and moves towards the second limiting hole 36 under the limiting guidance of the first limiting hole 35, and finally enters the limiting position between the rotating rod 3 and the housing 1 and is stably positioned by the limiting force body 33.
[0031] In some embodiments, a rolling body 39 is provided between the limiting force body 33 and the limiting ball 32. When the rotating rod 3 rotates relative to the housing 1, smooth rolling occurs between the rolling body 39 and the limiting ball 32. The rolling body 39 is a ball. That is, when the limiting ball 32 enters the reserved groove 34, the limiting ball 32 disengages from the limiting position between the rotating rod 3 and the housing 1. At this time, the rotating rod 3 can rotate relative to the housing 1. At this time, the limiting ball 32 is equivalent to blocking the first limiting hole 35. An arc surface or rolling contact is maintained between the limiting ball 32 and the rolling body 39, and its rotation will be very smooth. When the two rotate away from each other, an arc surface or rolling contact will also be formed between the rolling body 39 and the outer circumference of the rotating rod 3, and an arc surface or rolling contact will also be formed between the limiting ball 32 and the housing 1, making the entire rotation process very smooth, greatly reducing wear, extending the life of the assembly, and making the process of unlocking and opening the door very easy and labor-saving.
[0032] Specifically, the limiting acting force body 33 is an elastic compression body, and the elastic compression body is preferably a compression spring.
[0033] Specifically, a detachable plug 38 is provided at the outer end of the second limiting hole 36. The compression spring abuts against the plug 38. The plug 38 is a screw rod, and this structure facilitates the installation, disassembly, and maintenance of the lock body structure.
[0034] Key connection ends 37 are respectively provided at both ends of the lock core rod 31 for mating connection with a key. Inserting the key can drive the lock core rod 31 to rotate.
[0035] The working principle of this lock assembly: When the key is inserted into the lock core rod 31, it drives the lock core rod 31 to rotate. Referring to the corresponding marks or according to experience, in combination with Figure 4 As shown, after the reserved groove 34 is aligned with the first limiting hole 35, the limiting ball 32 enters the reserved groove 34, and the limiting ball 32 disengages from the limiting position between the rotating rod 3 and the housing 1, enabling the rotating rod 3 to rotate relative to the housing 1; that is, at this time, it is in the open state, and the rotating rod 3 can rotate to open the door; in combination with Figure 5 As shown, when the lock core rod 31 is rotated, the limiting ball 32 is gradually squeezed out of the reserved groove 34 and moves towards the second limiting hole 36 under the limiting guidance of the first limiting hole 35, and finally enters the limiting position between the rotating rod 3 and the housing 1 and is stably limited by the limiting acting force body 33; that is, at this time, it is in the locked state.
[0036] The above discloses only several specific embodiments of the present utility model. However, the embodiments of the present utility model are not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.
Claims
1. A handle type reducer for railway tunnel protection door, characterized in that: The invention comprises a housing (1), a handle (2) and a rotating rod (3); the rotating rod (3) is connected to a pinion (4); the pinion (4) is synchronously meshed with a first large gear (5) and a second large gear (6); the first large gear (5) and the second large gear (6) are respectively meshed with a first rack (7) and a second rack (8).
2. The handle type reducer for railway tunnel protection door according to claim 1, characterized in that: The small gear (4) is meshed with the second large gear (6) through an intermediate gear (9) of the same specification, and the small gear (4) is directly meshed with the first large gear (5).
3. A handle type reducer for railway tunnel protection door according to any one of claims 1-2, characterized in that: The rotating rod (3) is provided with a lock assembly for locking the rotating rod (3).
4. The handle type reducer for railway tunnel protection door according to claim 3, characterized in that: The lock assembly comprises a rotating lock core rod (31) which is built into the rotating rod (3) and is coaxially arranged therewith, a limiting ball (32) and a limiting force body (33); the lock core rod (31) is rotatable relative to the rotating rod (3); a reserved groove (34) which cooperates with the limiting ball (32) is provided on the lock core rod (31); a first limiting hole (35) which cooperates with the limiting ball (32) and corresponds to the reserved groove (34) is provided at a corresponding position of the rotating rod (3); a second limiting hole (36) which corresponds to the first limiting hole (35) is provided at a corresponding position of the housing; the limiting force body (33) is built into the first limiting hole (35) and provides a force to limit the rotation of the lock core. The limiting ball (32) is stabilized at the limiting position, the limiting ball (32) moves back and forth along the first limiting hole (35), the limiting ball (32) enters the reserved groove (34), and the limiting ball (32) is separated from the limiting position between the rotating rod (3) and the shell (1), so that the rotating rod (3) can rotate relative to the shell (1); the locking core rod (31) is rotated, the limiting ball (32) is gradually squeezed out of the reserved groove (34), and moves toward the second limiting hole (36) under the limiting guidance of the first limiting hole (35), and finally enters the limiting position between the rotating rod (3) and the shell (1), and is stabilized by the limiting force body (33).
5. The handle type reducer for railway tunnel protection door according to claim 4, characterized in that: The limiting force body (33) and the limiting ball (32) are provided with a rolling body (39); the rotating rod (3) rotates relative to the housing (1), and the rolling body (39) and the limiting ball (32) roll smoothly.
6. The handle type reducer for railway tunnel protection door according to claim 5, characterized in that: The rolling body (39) is a ball.
7. The handle type reducer for railway tunnel protection door according to claim 6, characterized in that: The position-limiting force body (33) is an elastic compression body.
8. The handle type reducer for railway tunnel protection door according to claim 7, characterized in that: The elastic compression body is a compression spring.
9. The handle type reducer for railway tunnel protection door according to claim 8, characterized in that: A detachable plug (38) is provided at the outer end of the second limiting hole (36), and the compression spring rests on the plug (38).
10. The handle type reducer for railway tunnel protection door according to claim 9, characterized in that: The plug (38) is a screw.