Gravity lift safety locking and release device

Abstract

The present invention relates to a gravity lifting safety locking and releasing device, comprising a fixed body and a steel rope on the fixed body, a gravity hanging head, and a locking mechanism, wherein the gravity hanging head comprises a hanging connecting body, a sliding shaft, a clamping head and a return guide, wherein the hanging connecting body is connected to the clamping head through a sliding shaft, and the return guide is a sliding member slidably installed on the sliding shaft; the locking mechanism is a movable component provided with a clamping tongue, and the locking mechanism is located at a corresponding position on the side of the gravity hanging head, and is used to lock the gravity hanging head to fix the hanging or open the gravity hanging head to release the falling; the side of the return guide corresponds to the side of the clamping head of the gravity hanging head; the return guide is naturally located at the lower position of the sliding shaft in a non-stressed state, so that a hanging distance is retained between the return guide and the clamping head. The present invention realizes the function of lifting and hanging or loosening and falling, does not require electricity, is automatically controlled, effectively improves the use performance and safety performance of the product, and is more suitable for market needs.

Description

Technical Field

[0001] The invention relates to a locking and releasing mechanism of a lifting device, and in particular to a locking and releasing device of a vertical lifting and hanging gravity object device. Background Art

[0002] At present, the locking device of the lifting equipment generally drives the locking tongue through the electric drive telescopic rod, and clamps the lifting head of the lifting device through the locking tongue, thereby forming the function of locking, fixing or loosening. The locking device of this structure needs to be controlled by power supply, thereby increasing the volume of the lifting device and increasing the manufacturing cost of the lifting device. Moreover, the locking device is not suitable for non-electrically controlled lifting equipment and is subject to certain restrictions in the application market. In addition, after the steel rope is suspended for a long time, the steel rope will expand slightly, which may easily cause the locking tongue to get stuck and the electronic control device to fail. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned problems existing in the locking device of the existing lifting equipment and to provide a gravity lifting safety locking and releasing device.

[0004] The gravity lifting safety locking and releasing device comprises a fixed body and a motor, a reel, a steel rope, and a gravity hanging head on the fixed body, wherein the motor drives the reel to roll the steel rope to drive the gravity hanging head to rise or fall, and also comprises a locking mechanism installed on the fixed body, wherein the gravity hanging head comprises a hanging connecting body, a connecting shaft, a clamping head and a return guide, wherein the hanging connecting body is connected to the clamping head through the connecting shaft, and the return guide is a sliding member slidably installed on the connecting shaft; the locking mechanism is a movable component provided with a clamping tongue, and the locking mechanism is located at a corresponding position on the side of the gravity hanging head, and is used to lock the gravity hanging head to fix the hanging or open the gravity hanging head to release and descend; the side surface of the return guide corresponds to the side surface of the clamping head of the gravity hanging head, so that when the return guide slides to above the connecting shaft, the side surface of the return guide and the side surface of the clamping head form a transition surface; the return guide is naturally located in the connecting shaft under a non-stressed state When the locking mechanism opens and the gravity hanging head descends, the gravity hanging head is first pulled up, and the locking tongue of the locking mechanism is pushed to open through the return guide. When the locking tongue slides to the side position of the return guide located at the low position of the hanging distance, the gravity hanging head is stopped from being pulled up and turned into being pulled down, and the locking tongue pushes the return guide to rise through the side of the return guide. When the return guide approaches or touches the top head, the locking tongue transitions from the side of the return guide to the side of the top head, so that the top head of the gravity hanging head is disengaged from the locking mechanism.

[0005] Furthermore, the latch tongue is a force-bearing component provided with a supporting surface and an inclined surface, a force-bearing supporting angle is formed between the supporting surface and the inclined surface, and a front end of the force-bearing supporting angle is a corresponding arc structure.

[0006] Furthermore, the return guide is a cylinder, an irregular cylinder, a trapezoid, a cone or an irregular cone, and the return guide is installed on the connecting shaft and has the function of sliding up and down.

[0007] Furthermore, the latch tongue is rotatably mounted via a positioning shaft at a corresponding side position of the gravity hanging head when the gravity hanging head is in a hanging state, a return spring is provided on the latch tongue, and the return function of the latch tongue is controlled by the return spring, and the latch tongue is provided with a limiting component.

[0008] Furthermore, the latch tongue is installed at a corresponding position on the side of the gravity hanging head when it is in a hanging state through a telescopic spring, and the latch tongue controls the return function of the latch tongue through the telescopic spring.

[0009] Furthermore, the latch tongue is installed at a corresponding position on the side of the gravity hanging head when it is in a hanging state through two permanent magnets, and the latch tongue controls the return function of the latch tongue through the principle of like-charge repulsion between the two permanent magnets.

[0010] Furthermore, a concave surface is provided at the bottom of the clamping head, and the force point of the clamping tongue supporting the clamping head is located at the concave surface.

[0011] Furthermore, the position where the latch tongue lifts up the latch head is a convex structure.

[0012] Furthermore, the return guide is made of wear-resistant plastic.

[0013] Furthermore, a concave arc surface is provided on the side of the return guide, and a pattern for increasing friction is provided at the contact position between the latch and the side of the return guide.

[0014] Furthermore, the locking mechanisms are provided with two or more, and the locking mechanisms are evenly distributed at the side positions of the gravity hanging head.

[0015] The present invention has the following outstanding substantive features and remarkable progress:

[0016] 1. The present invention realizes automatic opening or clamping of the clamping head of the gravity hanging head by the clamping tongue of the locking mechanism under the action of the rising and falling of the gravity hanging head, thereby realizing the function of lifting and hanging or loosening and lowering, without electricity, automatic control, effectively improving the use performance and safety performance of the product, and more suitable for market demand.

[0017] 2. The return guide of the present invention is made of wear-resistant plastic, and an inner concave arc surface is provided on the side of the return guide. A soft material layer is provided at the contact position between the latch tongue and the side of the return guide, thereby effectively increasing the friction area between the latch tongue and the return guide, thereby enhancing the sliding performance of the return guide, and better realizing the sliding of the latch tongue to the top head of the card, so that the gravity hanging head is in a relaxed and descending state, effectively improving the stability of the product performance.

[0018] 3. The bottom of the clamping head of the present invention is provided with an inner concave surface, and the force point of the clamping tongue supporting the clamping head is located at the inner concave surface. A convex structure is provided at the position where the clamping tongue supports the clamping head, thereby effectively preventing the clamping head from falling off due to the swing of gravity during the hanging process, and better ensuring the stability of product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of Example 1 of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of Example 1 of the present invention (the fixed body is omitted).

[0021] Figure 3 and Figure 4 This is a schematic diagram of the working principle of the locking mechanism of Example 1 of the present invention for clamping the gravity hanging head.

[0022] Figures 5 to 7 This is a schematic diagram of the working principle of the locking mechanism of Example 1 of the present invention when the gravity hanging head is opened and descended.

[0023] Figure 8 This is a schematic diagram of the structure of Example 2 of the present invention (the fixed body is omitted).

[0024] Fig. 9 This is a schematic diagram of the structure of Example 3 of the present invention (the fixed body is omitted).

[0025] Fig.10 This is a schematic diagram of the structure of Example 4 of the present invention (the fixed body is omitted).

[0026] Fig.11 for Fig.10 AA cross-sectional view of the card head.

[0027] Fig.12 Schematic diagram of the tongue structure of embodiment 4 of the present invention

[0028] Fig.13 for Fig.10 Top view of the .

[0029] Fig.14 This is a schematic diagram of the structure of Example 5 of the present invention (the fixed body is omitted).

[0030] Fig.15This is a schematic diagram of the structure of Example 6 of the present invention (the fixed body is omitted).

[0031] Fig.16 This is a structural diagram of Example 7 of the present invention. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0033] Embodiment 1:

[0034] Reference Figure 1 and Figure 2 The gravity lifting safety locking and releasing device shown comprises a fixed body 1 and a motor, a reel, a steel rope 5, and a gravity hanging head 2 on the fixed body 1. The motor drives the reel to roll the steel rope 5 to drive the gravity hanging head 2 to rise or fall. The device comprises a fixed body 1, a gravity hanging head 2 installed on the fixed body 1, and a locking mechanism 3. The fixed body 1 comprises a fixed shell 11 and a fixed column 12. The gravity hanging head 2 comprises a hanging connecting body 21, a connecting shaft 22, a clamping head 23, and a return guide 24. The hanging connecting body 21 is connected to the clamping head 23 through the connecting shaft 22. The clamping head 23 is in the shape of a screw head. The cross-sections of the connecting shaft 22 and the clamping head 23 are in a T-shaped structure. The return guide 24 is a sliding member slidably installed on the connecting shaft 22, that is, the return guide 24 is located between the hanging connecting body 21 and the clamping head 23, and forms an up and down movement function on the connecting shaft 22.

[0035] The locking mechanism 3 is a movable component provided with a latch 31. The locking mechanism 3 is located at a corresponding position on the side of the gravity hanging head 2, that is, the locking mechanism 3 is fixed on the fixed body 1 and is located at a side position when the gravity hanging head 2 is in a fixed hanging state, and is used to lock the gravity hanging head 2 to fix the hanging state or open the gravity hanging head 2 to release and descend. The side of the return guide 24 corresponds to the side of the clamping head 23 of the gravity hanging head 2, so that when the return guide 24 slides above the connecting shaft 22, the side of the return guide 24 and the side of the clamping head 23 form a transition surface; specifically, the diameter of the return guide 24 corresponds to the clamping head 23, such as the diameter of the return guide 24 is equal to or slightly larger than the diameter of the clamping head 23, so that when the return guide 24 slides close to or touches the clamping head 23, the side of the return guide 24 and the side of the clamping head 23 form a transition plane. The return guide 24 is naturally located at the lower position of the connecting shaft 22 in a non-stressed state, so that a hanging distance 4 is reserved between the return guide 24 and the clamping head 23 .

[0036] In the embodiment, the latch 31 is rotatably mounted at the corresponding side position of the gravity hanging head 2 when it is in the hanging state through a positioning shaft 32. A return spring 33 is provided on the latch 31, and the return function of the latch 31 is controlled by the return spring 33. The latch 31 is provided with a limiting component 36, which is a fixed column. The fixed column limits the latch 31 from rotating downward to lift the gravity hanging head 2. The return guide 24 is a cylinder, an irregular cylinder, a trapezoid, a cone or an irregular cone. The return guide 24 is mounted on the connecting shaft 22 and has the function of sliding up and down. As shown in the figure, the return guide 24 is a cylinder. In order to improve the sliding function of the return guide 24, the return guide 24 is made of wear-resistant plastic (hard rubber). The return guide 24 is mounted on the connecting shaft 22 through a linear bearing 241. The latch tongue 31 is a force-bearing component provided with a supporting surface 311 and an inclined surface 312, and a force-bearing lifting angle 313 is formed between the supporting surface 311 and the inclined surface 312. The front end of the force-bearing lifting angle 313 is a corresponding arc structure (it can also be said to be an arc structure) to improve the transition and sliding to the clamping head 23 more smoothly when the latch tongue 31 pushes the return guide 24 to rise to the clamping head 23. When used, the latch tongue 31 forms a rotation opening and return clamping function under the action of the positioning shaft 32 and the return spring 33.

[0037] When the locking mechanism 3 clamps the gravity hanging head 2, that is, when the locking mechanism 3 is about to clamp the gravity hanging head 2, as shown in FIG. Figure 3 and Figure 4 As shown, the gravity hanging head 2 is pulled up by the steel rope 5, and the latching tongue 31 of the locking mechanism 3 is pushed to rotate and open from the upper side of the clamping head 23. After the latching tongue 31 slides over the clamping head 23, it returns to the position at the hanging distance 4 and is clamped into the hanging distance 4. The limiting component 36 is used to limit the rotation of the latching tongue 31 to lift (support) the clamping head 23 at the hanging distance 4 to fix the gravity hanging head 2, so that the gravity hanging head 2 is in a locked state (i.e., a hanging state);

[0038] When the locking mechanism 3 opens the gravity hanging head 2 to descend, that is, when the locking mechanism 3 is about to open the gravity hanging head 2 to descend, Figures 5 to 7As shown, the gravity hanging head 2 is pulled up by the steel rope 5, and the latch tongue 31 of the locking mechanism 3 is pushed to rotate and open through the upper side of the return guide 24. When the latch tongue 31 slides to the side position of the return guide 24 located at the low position of the hanging spacing 4, the gravity hanging head 2 is stopped from being pulled up. The stopped pulling state can be achieved by setting a limiting mechanism on the fixed body 1 on the gravity hanging head 2. The limiting mechanism makes the return guide 24 not lower than the set (height) position of the latch tongue 31 of the locking mechanism 3 when the gravity hanging head 2 is raised. After stopping, it is converted into pulling the gravity hanging head 2 down, so that the latch tongue 31 passes through the return guide 24. The friction formed on the side of the guide 24 pushes the return guide 24 to rise (the rise of the return guide 24 described in the present technical solution is relative to the connecting shaft 22, specifically the gravity hanging head 2 descends, changing the position of the return guide 24 on the connecting shaft 22, so that the return guide 24 moves to the clamping head 23). When the return guide 24 approaches the clamping head 23, the latch tongue 31 transitions from the side of the return guide 24 to the side of the clamping head 23, that is, the latch tongue 31 slides over the transition plane formed by the side of the return guide 24 and the side of the clamping head 23, so that the clamping head 23 of the gravity hanging head 2 and the locking mechanism 3 are out of the descending state.

[0039] Embodiment 2:

[0040] The technical features of this embodiment are: Figure 8 As shown, the contact position between the latch tongue 31 and the side of the return guide 24 is provided with a pattern 315 for increasing friction or a soft material layer, such as rubber material, so as to increase the friction between the latch tongue 31 and the return guide 24 and better push the return guide 24 to slide and rise. The diameter of the return guide 24 is slightly larger than the diameter of the clamping head 23. The return guide 24 can be made of a light material (such as an aluminum profile) and a plastic layer 243 is provided on the side of the profile. The rest is the same as the above embodiment.

[0041] Embodiment 3:

[0042] The technical features of this embodiment are: Fig. 9 As shown, the side of the return guide 24 is provided with a concave arc surface 242 to increase the friction surface between the latch 31 and the return guide 24, thereby improving the stability of the latch 31 pushing the return guide 24. At the same time, the upper side of the return guide 24 is equal to or larger than the clamping head 23, so that when the latch 31 pushes the return guide 24 to rise to the clamping head 23, it can slide onto the clamping head 23 more smoothly, and the rest is the same as the above embodiment.

[0043] Embodiment 4:

[0044] The technical features of this embodiment are: Figures 10 to 13As shown, the bottom of the clamping head 23 is provided with an inner concave surface 231, and the force point of the clamping tongue 31 holding up the clamping head 23 is located at the inner concave surface 231. Specifically, a convex structure 314 is formed at the position where the clamping tongue 31 holds up the clamping head 23, that is, a convex structure 314 is provided on the supporting surface 311, so that when the clamping tongue 31 is hung, the convex structure 314 is located at the position of the inner concave surface 231 at the bottom of the clamping head 23, making the hanging more stable and improving the hanging performance, and the rest is the same as the above embodiment.

[0045] Embodiment 5:

[0046] The technical features of this embodiment are: Fig.14 As shown, the latch tongue 31 is installed at the corresponding side position of the gravity hanging head 2 when it is in the hanging state through a telescopic spring 34. The return function of the latch tongue 31 is controlled by the telescopic spring 34, and the rest is the same as the above embodiment.

[0047] Embodiment 6:

[0048] The technical features of this embodiment are: Fig.15 As shown, the latch tongue 31 is installed at the corresponding side position of the gravity hanging head 2 when it is in the hanging state through two permanent magnets 35. The latch tongue 31 controls the return function of the latch tongue 31 through the principle of like-charge repulsion between the two permanent magnets 35, and the rest is the same as the above embodiment.

[0049] Embodiment 7:

[0050] The technical feature of this embodiment is that: the locking mechanisms 3 are provided with two or more, and the locking mechanisms 3 are evenly distributed at the side positions of the gravity hanging head 2, such as Fig.16 As shown, the two locking mechanisms 3 are symmetrically distributed on the side of the gravity hanging head 2, which better ensures that the gravity hanging head 2 can easily break away from the locking tongue 31 of the locking mechanism 3 during hanging, thereby improving the stability of hanging. The rest is the same as the above embodiment.

Claims

1. A gravity lifting safety locking and releasing device, comprising a fixed body (1), a steel rope (5) on the fixed body (1), a gravity hanging head (2) and a motor, wherein the motor drives a reel to roll the steel rope (5) to drive the gravity hanging head (2) to rise or fall, and wherein the device is characterized in that: It also includes a locking mechanism (3) mounted on the fixed body (1). The gravity hanging head (2) comprises a hanging connecting body (21), a connecting shaft (22), a clamping head (23) and a return guide (24); the hanging connecting body (21) is connected to the clamping head (23) via the connecting shaft (22); the return guide (24) is a sliding member slidably mounted on the connecting shaft (22); the locking mechanism (3) is a movable component provided with a clamping tongue (31); the locking mechanism (3) is located at a corresponding position on the side of the gravity hanging head (2) and is used to lock the gravity hanging head (2) to fix the hanging or open the gravity hanging head (2) to release it for descent; The side surface of the return guide (24) corresponds to the side surface of the clamping head (23) of the gravity hanging head (2), so that the side surface of the return guide (24) and the side surface of the clamping head (23) form a transition surface when in contact; A hanging distance (4) is reserved between the return guide (24) and the clamping head (23) to facilitate the clamping tongue (31) to be clamped into the hanging distance (4) or to leave the hanging distance (4) to achieve a locked state or a released disengaged state; When the locking mechanism (3) locks the gravity hanging head (2), the steel rope (5) pulls the gravity hanging head (2) upward, and the locking head (23) pushes the locking tongue (31) of the locking mechanism (3) to move, and the locking tongue (31) slides over the locking head (23) and returns to its original position at the hanging distance (4) and is locked into the hanging distance (4), and the locking head (23) is supported at the hanging distance (4) to fix the gravity hanging head (2), so that the gravity hanging head (2) is locked; When the locking mechanism (3) opens the gravity hanging head (2) to descend, the gravity hanging head (2) is first pulled up, and the latching tongue (31) of the locking mechanism (3) is pushed to open through the return guide (24). When the latching tongue (31) slides to a side position of the return guide (24) at a low position of the hanging distance (4), the gravity hanging head (2) is stopped from being pulled up, and the gravity hanging head (2) is pulled down. The latching tongue (31) pushes the return guide (24) up through the side of the return guide (24). When the return guide (24) approaches or touches the top head (23), the latching tongue (31) transitions from the side of the return guide (24) to the side of the top head (23), so that the top head (23) of the gravity hanging head (2) is separated from the locking mechanism (3).

2. The gravity lifting safety locking and releasing device according to claim 1 is characterized in that: The latch tongue (31) is a force-bearing component provided with a supporting surface (311) and an inclined surface (312); a force-bearing supporting angle (313) is formed between the supporting surface (311) and the inclined surface (312); and a front end of the force-bearing supporting angle (313) is a corresponding arc structure.

3. The gravity lifting safety locking and releasing device according to claim 1 is characterized in that: The return guide (24) is a cylinder, a trapezoid or a cone, and is mounted on the connecting shaft (22) and has the function of sliding up and down.

4. The gravity lifting safety locking and releasing device according to claim 1 is characterized in that: A positioning shaft (32) is provided on one side of the fixed body (1) and the gravity hanging head (2). The latch tongue (31) is hinged on the positioning shaft (32). A return spring (33) is provided on the latch tongue (31). The return function of the latch tongue (31) is controlled by the return spring (33). The latch tongue (31) is provided with a limiting component (36).

5. The gravity lifting safety locking and releasing device according to claim 1, 2, 3 or 4, characterized in that: The latch tongue (31) is installed at a corresponding position on the side of the gravity hanging head (2) when it is in a hanging state via a telescopic spring (34), and the latch tongue (31) controls the return function of the latch tongue (31) via the telescopic spring (34).

6. The gravity lifting safety locking and releasing device according to claim 1, 2, 3 or 4, characterized in that: The latch tongue (31) is installed at a corresponding position on the side of the gravity hanging head (2) when it is in a hanging state via two permanent magnets (35); the latch tongue (31) controls the return function of the latch tongue (31) via the principle of like magnets repelling each other between the two permanent magnets (35).

7. The gravity lifting safety locking and releasing device according to claim 1, 2, 3 or 4, characterized in that: An inner concave surface (231) is provided at the bottom of the clamping head (23), and the force point at which the clamping tongue (31) lifts the clamping head (23) is located at the inner concave surface (231).

8. The gravity lifting safety locking and releasing device according to claim 1, 2, 3 or 4, characterized in that: The position where the latch tongue (31) lifts up the latch head (23) is a convex structure (314).

9. The gravity lifting safety locking and releasing device according to claim 1, 2, 3 or 4, characterized in that: Two or more locking mechanisms (3) are provided, and the locking mechanisms (3) are evenly distributed at the side positions of the gravity hanging head (2).

10. The gravity lifting safety locking and releasing device according to claim 1, 2, 3 or 4, characterized in that: The side surface of the return guide (24) is provided with an inwardly concave arc surface (242), and the contact position between the latch tongue (31) and the side surface of the return guide (24) is provided with a pattern (315) for increasing friction.

Images