A box-type elevator safety clamp

Abstract

This utility model relates to a safety clamp for a box-type elevator, comprising a wedge-shaped braking element, a connecting plate, and a guide member. The wedge-shaped braking element includes a wedge block and a wear-resistant block. The wedge block is slidably disposed on the guide member, and its rear side is connected to the connecting plate. The wear-resistant block is located on the side of the wedge block away from the guide member. The wear-resistant block is provided with a limiting slot, and a corresponding strip-shaped limiting block is provided on the wedge block. The strip-shaped limiting block is slidably inserted into the limiting slot. A limiting sleeve is slidably fitted onto the outer side of the wear-resistant block, and the connection between the wedge block and the wear-resistant block is limited within the limiting sleeve. This solution separates the braking element into a wedge block and a wear-resistant block. In daily maintenance, only the wear-resistant block needs to be replaced, saving on usage costs. The wear-resistant block is connected to the wedge block through a sliding insertion structure between the strip-shaped limiting block and the limiting slot, and is constrained on the outer side by a C-shaped limiting sleeve, which ensures the stability of the connection structure and facilitates quick disassembly of the wear-resistant block.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, specifically to a safety clamp for a box-type elevator. Background Technology

[0002] In elevator safety protection systems, the safety brake is a core component, and the reliability of its braking element directly affects the stability of the braking effect. Since the braking element is in direct contact with the guide rail and is a wear part, it requires regular inspection of its wear and timely replacement after prolonged use.

[0003] Existing elevator safety brakes typically employ wedge-shaped blocks as braking elements. For example, patent CN115872254B discloses an elevator safety brake device comprising a support frame, a U-shaped spring, a first guide member, a second guide member, a first wedge, a second wedge, a connecting plate, a connecting rod, and a speed governor. The U-shaped spring is housed within the support frame, and the first and second guide members are symmetrically mounted within the U-shaped spring. The first and second wedges are slidably disposed within the first and second guide members, respectively, with their rear sides mounted on the connecting plate. The connecting rod is fixed to the top of the connecting plate, with a connecting nut connected to one end. The connecting nut is connected to the operating end of the elevator speed governor via a connecting line.

[0004] However, because the aforementioned braking components (the first and second wedges) are mounted on the connecting plate at the rear, the entire braking component must be disassembled for inspection and replacement. This is not only cumbersome but may also affect the connection accuracy due to repeated disassembly and reassembly, thereby reducing the braking response sensitivity of the safety gear. Especially in scenarios such as high-rise elevators where maintenance efficiency is crucial, this inconvenience can significantly increase downtime for maintenance, affecting the normal operation of the elevator. Utility Model Content

[0005] The purpose of this invention is to overcome the technical defect of the existing box-type elevator safety clamp that is difficult to replace the jaws, and to provide a box-type elevator safety clamp that is easy to replace worn parts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a box-type elevator safety clamp, comprising a wedge-shaped braking element, a connecting plate, and a guide member. The wedge-shaped braking element comprises a wedge-shaped block and a wear-resistant block. The wedge-shaped block is slidably disposed on the guide member, and its rear side is connected to the connecting plate. The wear-resistant block is located on the side of the wedge-shaped block away from the guide member. The wear-resistant block is provided with a limiting slot, and a corresponding strip-shaped limiting block is provided on the wedge-shaped block. The strip-shaped limiting block is slidably inserted into the limiting slot. A limiting sleeve is slidably sleeved on the outer side of the wear-resistant block, and the connection between the wedge-shaped block and the wear-resistant block is limited within the limiting sleeve.

[0007] Furthermore, both the strip-shaped limiting block and the limiting slot have a horizontally inverted T-shaped cross-section.

[0008] Furthermore, the limiting sleeve has a C-shaped structure.

[0009] Furthermore, the wedge-shaped block has an opening groove on its front sidewall, and a drive module is fixedly installed in the opening groove to drive the limiting sleeve to slide left and right.

[0010] Furthermore, the drive module includes a slide groove, a threaded drive rod, a drive shaft, and a bevel gear transmission assembly. The threaded drive rod is rotatably disposed within the slide groove, and a slider is provided on the limiting sleeve corresponding to the slide groove, with the slider being threadedly connected to the threaded drive rod. The drive shaft is rotatably disposed at one end of the slide groove and is perpendicular to the threaded drive rod. The rear end of the drive shaft is connected to the threaded drive rod via the bevel gear transmission assembly, and the front end extends from the front side of the slide groove.

[0011] Furthermore, the front end face of the drive shaft is flush with the front side face of the slide groove, and a hexagonal recess is provided on the front end face of the drive shaft.

[0012] Furthermore, a positioning plate for positioning the wear-resistant block is provided on the rear side of the wedge block. The positioning plate is provided with an ejector spring, and the wear-resistant block is provided with a notch. The ejector spring extends into the notch and abuts against the inner wall of the notch.

[0013] The beneficial effects of this utility model are:

[0014] This solution breaks down the braking element into a wedge block and a wear-resistant block. Routine maintenance only requires replacing the wear-resistant block, effectively reducing operating costs. The wear-resistant block is connected to the wedge block via a sliding insertion structure between a strip-shaped limiting block and a limiting slot, and is constrained on the outside by a C-shaped limiting sleeve. When the wear-resistant block needs replacement due to long-term friction, the drive module simply moves the limiting sleeve to slide and release the constraint, allowing the old wear-resistant block to be pulled out along the T-shaped limiting structure and the new part inserted. There is no need to disassemble the connection between the wedge block and the connecting plate, significantly simplifying the maintenance process.

[0015] The positioning plate on the rear side of the wedge block and the ejection spring apply force to the wear-resistant block through the notch. After the limit sleeve slides and releases the constraint, the ejection spring is designed to eject the wear-resistant block, thereby avoiding the problem of inconvenience in pulling out the wear-resistant block due to the small gap between the wear-resistant block and the guide rail.

[0016] The strip-shaped limiting block and the limiting slot adopt a horizontally inverted T-shaped longitudinal section design, which, together with the C-shaped limiting sleeve, wraps and constrains the connection. This ensures the force transmission efficiency of the wear-resistant block and the wedge block during braking, and prevents them from separating in the vertical direction or shifting laterally. This ensures the instantaneous response accuracy during braking and solves the problem of decreased connection accuracy caused by repeated disassembly and assembly in the existing technology.

[0017] The drive module, through a threaded drive rod, a bevel gear transmission assembly, and a drive shaft with a hexagonal countersunk groove, can easily drive the limit sleeve to slide left and right, thereby achieving limit constraint or releasing constraint.

[0018] The front end face of the drive shaft is flush with the front side of the slide and has a hexagonal recess, which not only prevents accidental release of the constraint due to accidental contact, but also facilitates operation with professional tools. Attached Figure Description

[0019] Figure 1 This is a front view of the wedge-shaped braking element, connecting plate, and guide.

[0020] Figure 2 This is a schematic diagram of the connection structure between the wedge-shaped braking element and the connecting plate and guide component;

[0021] Figure 3 This is an exploded view of the wedge-shaped braking element;

[0022] Figure 4 This is a schematic diagram of the rear side structure of the wear-resistant block;

[0023] Figure 5 This is a front view of the driver module.

[0024] Figure 6 This is a schematic diagram of the rear structure of the driver module.

[0025] 1. Wedge-shaped braking element; 2. Connecting plate; 3. Guide component; 4. Wedge block; 5. Wear-resistant block; 6. Limiting slot; 7. Strip-shaped limiting block; 8. Limiting sleeve; 9. Opening slot; 10. Slide groove; 11. Threaded drive rod; 12. Drive shaft; 13. Bevel gear transmission assembly; 14. Slider; 15. Hexagonal countersunk groove; 16. Positioning plate; 17. Ejection spring; 18. Notch groove. Detailed Implementation

[0026] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0027] Embodiments of this utility model: such as Figure 1-6As shown, a safety clamp for a box-type elevator includes a wedge-shaped braking element 1, a connecting plate 2, and a guide member 3. The wedge-shaped braking element 1 includes a wedge-shaped block 4 and a wear-resistant block 5. The wedge-shaped block 4 is slidably disposed on the guide member 3, and its rear side is connected to the connecting plate 2. The wear-resistant block 5 is located on the side of the wedge-shaped block 4 away from the guide member 3. The wear-resistant block 5 is provided with a limiting slot 6, and the wedge-shaped block 4 is correspondingly provided with a strip-shaped limiting block 7. The strip-shaped limiting block 7 is slidably inserted into the limiting slot 6. A limiting sleeve 8 is slidably sleeved on the outside of the wear-resistant block 5. The limiting sleeve 8 has a C-shaped structure, and the connection between the wedge-shaped block 4 and the wear-resistant block 5 is limited within the limiting sleeve 8.

[0028] It is worth noting that the wear-resistant block 5 is made of high-strength wear-resistant alloy or cast iron to ensure friction and durability during braking.

[0029] With the above structure, when it is necessary to replace the wear-resistant block 5, first move the limiting sleeve 8 to the side away from the wear-resistant block 5 to release the constraint, then pull it outward from the wear-resistant block 5, replace the new wear-resistant block 5, and then move the limiting sleeve 8 back to the original position to constrain the wear-resistant block 5 within the limiting sleeve 8.

[0030] like Figure 3 As shown, both the strip-shaped limiting block 7 and the limiting slot 6 have horizontally inverted T-shaped cross-sections.

[0031] The above structure can constrain the wear-resistant block 5 in the horizontal direction, preventing it from shifting and getting too close to the guide rail during normal elevator operation, thus avoiding wear and preventing the elevator from braking when needed.

[0032] like Figure 3 As shown, the wedge block 4 has an opening groove 9 on its front side wall, and a drive module is fixedly installed in the opening groove 9 to drive the limiting sleeve 8 to slide left and right.

[0033] like Figure 5 , 6 As shown, the drive module includes a slide groove 10, a threaded drive rod 11, a drive shaft 12, and a bevel gear transmission assembly 13. The threaded drive rod 11 is rotatably disposed within the slide groove 10. A slider 14 is provided on the limiting sleeve 8 corresponding to the slide groove 10, and the slider 14 is threadedly connected to the threaded drive rod 11. The drive shaft 12 is rotatably disposed at one end of the slide groove 10 and is perpendicular to the threaded drive rod 11. The rear end of the drive shaft 12 is connected to the threaded drive rod 11 via the bevel gear transmission assembly 13, and the front end extends from the front side of the slide groove 10.

[0034] like Figure 5 As shown, the front end face of the drive shaft 12 is flush with the front side face of the slide groove 10, and a hexagonal recess 15 is provided on the front end face of the drive shaft 12.

[0035] With the above structure, rotating the drive shaft 12 with an Allen wrench will drive the threaded drive rod 11 to rotate, thereby causing the limiting sleeve 8 to move left and right, achieving constraint or contact constraint on the wear-resistant block 5. The front end of the drive shaft 12 is flush with the front side of the slide groove 10 to avoid accidental contact and unintentional release of constraint.

[0036] like Figure 3 , 4 As shown, the wedge block 4 is provided with a positioning plate 16 for positioning the wear-resistant block 5 on its rear side. The positioning plate 16 is provided with an ejector spring 17, and the wear-resistant block 5 is provided with a notch 18. The ejector spring 17 extends into the notch 18 and abuts against the inner wall of the notch 18.

[0037] With the above structure, the ejector spring 17 is designed so that after the limiting sleeve 8 moves and releases the constraint, the ejector spring 17 pushes the wear-resistant block 5 to move forward, thereby facilitating the removal of the wear-resistant block 5.

[0038] Working principle: When replacing the wear-resistant block 5, turn the drive shaft 12 with an Allen wrench to rotate the threaded drive rod 11, causing the limiting sleeve 8 to move away from the wear-resistant block 5, releasing the constraint. At this time, the ejector spring 17 returns to its original position, pushing out the wear-resistant block 5 for easy removal. Align the limiting slot 6 on the new wear-resistant block 5 with the strip-shaped limiting block 7, and push the wear-resistant block 5 backward to make it contact the ejector spring 17. Continue pushing until it contacts the positioning plate 16, while the ejector spring 17 is compressed, storing energy for the next replacement of the wear-resistant block 5. At this time, the drive shaft 12 can be rotated in the opposite direction to move the limiting sleeve 8 to one side of the wear-resistant block 5 to achieve constraint, thereby fixing the wear-resistant block 5.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0041] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A safety clamp for a box-type elevator, comprising a wedge-shaped braking element (1), a connecting plate (2), and a guide member (3), characterized in that: The wedge-shaped braking element (1) includes a wedge block (4) and a wear-resistant block (5). The wedge block (4) is slidably disposed on the guide member (3) and its rear side is connected to the connecting plate (2). The wear-resistant block (5) is located on the side of the wedge block (4) away from the guide member (3). The wear-resistant block (5) is provided with a limiting slot (6), and the wedge block (4) is provided with a corresponding strip-shaped limiting block (7). The strip-shaped limiting block (7) is slidably inserted into the limiting slot (6). The wear-resistant block (5) is slidably sleeved with a limiting sleeve (8) on its outer side. The connection between the wedge block (4) and the wear-resistant block (5) is limited within the limiting sleeve (8).

2. A box-type elevator safety gear according to claim 1, characterized in that: The longitudinal section of both the strip-shaped limiting block (7) and the limiting slot (6) is a horizontally inverted T-shaped structure.

3. A box-type elevator safety gear according to claim 1, characterized in that: The limiting sleeve (8) has a C-shaped structure.

4. A box-type elevator safety gear according to claim 1, characterized in that: The wedge block (4) has an opening groove (9) on its front side wall. A drive module is fixedly installed in the opening groove (9) to drive the limiting sleeve (8) to slide left and right.

5. A box-type elevator safety gear according to claim 4, characterized in that: The drive module includes a slide (10), a threaded drive rod (11), a drive shaft (12), and a bevel gear transmission assembly (13). The threaded drive rod (11) is rotatably disposed in the slide (10). A slider (14) is provided on the limiting sleeve (8) corresponding to the slide (10), and the slider (14) is threadedly connected to the threaded drive rod (11). The drive shaft (12) is rotatably disposed at one end of the slide (10) and is perpendicular to the threaded drive rod (11). The rear end of the drive shaft (12) is connected to the threaded drive rod (11) through the bevel gear transmission assembly (13), and the front end extends out from the front side of the slide (10).

6. A box-type elevator safety gear according to claim 5, characterized in that: The front end face of the drive shaft (12) is flush with the front side of the slide (10), and a hexagonal recess (15) is provided on the front end face of the drive shaft (12).

7. A box-type elevator safety gear according to claim 1, characterized in that: The wedge block (4) is provided with a positioning plate (16) for positioning the wear-resistant block (5) on the rear side. The positioning plate (16) is provided with an ejector spring (17), and the wear-resistant block (5) is provided with a notch (18). The ejector spring (17) extends into the notch (18) and abuts against the inner wall of the notch (18).

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