Lifting device and its locking mechanism

Abstract

The utility model provides a kind of lifting equipment and its locking mechanism.Lifting equipment includes first cylinder, transmission shaft and driving part, transmission shaft is located on first cylinder, and the input end of transmission shaft is equipped with first clamping part, and the output end of driving part is equipped with first clamping hole.Locking mechanism includes: fixed support piece, with first cylinder fixed connection, fixed support piece is equipped with the through-hole for the output end of driving part to pass;Fixed lock piece, with fixed support piece fixed connection, fixed lock piece is equipped with the second clamping hole that can allow the output end of driving part to pass;Sliding lock piece is equipped with second clamping part and third clamping hole, second clamping part can be connected with second clamping hole, and when sliding lock piece is sleeved in the input end of transmission shaft, third clamping hole is connected with first clamping part;Elastic piece one end abuts against sliding lock piece, and the other end abuts against first cylinder.The utility model is used to solve the problem that the transmission mechanism in lifting equipment cannot be self-locked and produces slide because of screw sliding.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a lifting device and its locking mechanism. Background Technology

[0002] In a lifting device, the transmission mechanism typically uses a drive shaft to drive a bevel gear connected to a trapezoidal lead screw, which in turn drives the lead screw to rotate on a fixed nut. This rotation causes the bevel gear assembly connected to the lead screw and the cylinder to move up and down, thereby achieving the lifting and lowering motion of the device.

[0003] Because the transmission mechanism has high internal efficiency but generally poor self-locking performance, in some cases, the lead screw may rotate and slide downwards due to vibrations generated by the movement of the equipment, affecting the performance and safety of the lifting equipment. Utility Model Content

[0004] The purpose of this utility model is to provide a lifting device and its locking mechanism to solve the problem of downward movement caused by the slippage of the transmission mechanism inside the lifting device.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] To achieve the above objectives, in a first aspect, this utility model provides a locking mechanism applied to a lifting device. The lifting device includes a first cylinder, a drive shaft, and a drive component. The drive shaft is disposed on the first cylinder, and the input end of the drive shaft is provided with a first engaging portion along the circumferential direction. The output end of the drive component is provided with a first locking hole.

[0007] The locking mechanism includes:

[0008] A fixed support member is fixedly connected to the first cylinder body, and the fixed support member is provided with a through hole along its axial direction for the output end of the drive member to pass through;

[0009] A fixing locking plate is fixedly connected to the fixing support member. The fixing locking plate is provided with a second locking hole, which allows the output end of the driving member to pass through. The output end of the driving member can pass through the through hole and the second locking hole and engage with the first locking hole and the first engaging part.

[0010] The sliding locking piece has a second engaging portion protruding towards the fixed locking piece, and a third locking hole concentrically disposed with the second engaging portion. The second engaging portion can engage with the second locking hole. When the sliding locking piece is sleeved on the input end of the transmission shaft, the third locking hole engages with the first engaging portion.

[0011] An elastic element is sleeved on the input end of the transmission shaft, with one end of the elastic element abutting against the sliding locking piece and the other end abutting against the first cylinder.

[0012] This technical solution locks the drive shaft by setting a locking structure at the input end of the drive shaft of the lifting equipment, which also prevents the bevel gear mechanism and lead screw connected to it from rotating, thus locking the entire transmission mechanism and preventing slippage.

[0013] Preferably, the second engaging portion of the sliding lock piece engages with the second locking hole, and the locking mechanism is in a self-locking state;

[0014] The output end of the driving component pushes the sliding locking piece to disengage from the second engaging part and the second locking hole, and the locking mechanism is in the unlocked state;

[0015] When the driving member is withdrawn, under the action of the elastic member, the second engaging portion of the sliding lock piece engages with the second locking hole, and the locking mechanism returns to its self-locking state.

[0016] This technical solution enables the locking mechanism to be unlocked by the driving component when lifting is required, thereby driving the transmission shaft to rotate, and the self-locking can be restored under the action of the elastic component when the driving component is withdrawn.

[0017] Preferably, the fixing locking plate has a plurality of limiting notches in its circumferential direction, and the fixing support has a plurality of limiting protrusions in its circumferential direction that match the limiting notches. This technical solution facilitates the assembly and connection of the fixing locking plate and the fixing support, and restricts the rotation of the fixing locking plate relative to the fixing support, thereby enhancing the connection strength between the two.

[0018] Preferably, the fixing support and the fixing locking plate are designed as a single integrated part. This technical solution can eliminate the risk of the fixing locking plate rotating relative to the fixing support.

[0019] Preferably, the input end of the drive shaft extends out of the first cylinder, the output end of the drive member is provided with a retaining pin in the circumferential direction, the through hole of the fixed support member is provided with a groove for the retaining pin to pass through, and the end face of the fixed support member facing the fixed locking piece is recessed inward to form a receiving cavity, the receiving cavity being used to accommodate the output end of the drive member and the retaining pin. This technical solution enables the detachable connection of the drive member and locks the drive member in the cavity of the fixed support member, ensuring that the drive member, i.e., the manual wrench, is not easily dislodged and falls to avoid accidental injury. At the same time, the receiving cavity provides the range of motion of the retaining pin when the output end of the drive member rotates.

[0020] Optionally, the input end of the drive shaft is provided with a guide support portion, which is located between the first engaging portion and the end face of the input end of the drive shaft. This guide support portion guides the drive member to rotate freely so that the first locking hole aligns with the first engaging portion of the drive shaft. It also supports the output end of the drive member when the first locking hole of the drive member exits the first engaging portion, and guides the drive member to rotate freely so that the locking pin aligns with the slot of the fixed support member, thereby enabling the drive member to exit. This technical solution facilitates the alignment of the first locking hole of the drive member with and locking the first engaging portion of the drive shaft, and supports the output end of the drive member on the guide support portion. Combined with the locking pin to limit the drive member, this prevents the drive member from slipping out or falling off.

[0021] Preferably, the first engaging portion is a hexagonal locking platform, and the first and third locking holes are hexagonal holes. This technical solution makes the engagement between the drive shaft, the drive component, and the sliding locking plate more reliable.

[0022] Preferably, the second engaging portion is a hexagonal boss, and the second locking hole is a hexagonal hole. This technical solution makes the engagement between the sliding locking piece and the fixed locking piece more reliable, thereby restricting the rotation of the sliding locking piece in the self-locking state.

[0023] A second aspect of this utility model provides a lifting device, comprising:

[0024] First cylinder;

[0025] A drive shaft is disposed in the first cylinder, and the input end of the drive shaft is provided with a first engaging part along the circumferential direction;

[0026] The drive unit has a first locking hole at its output end, which can be engaged with the first engaging part to drive the transmission shaft to rotate;

[0027] The locking mechanism described above is located at the input end of the drive shaft.

[0028] This technical solution locks the drive shaft by setting a locking structure at the input end of the drive shaft of the lifting equipment, which also prevents the bevel gear mechanism and lead screw connected to it from rotating, thus locking the entire transmission mechanism and preventing slippage.

[0029] Preferably, the input end of the drive shaft extends out of the first cylindrical body, and the first cylindrical body includes an input end cylindrical body disposed around the input end of the drive shaft, with the fixed support member fixedly connected to the input end cylindrical body. This technical solution facilitates the installation and fixation of the fastener support member.

[0030] Preferably, the lifting device further includes a bevel gear mechanism, a lead screw pair, and a second cylinder. The bevel gear mechanism, the lead screw pair, and the second cylinder are all housed within the first cylinder. The output end of the drive shaft is connected to the bevel gear mechanism. The lead screw in the lead screw pair is connected to the bevel gear mechanism, and the lead nut is connected to the second cylinder. This technical solution defines the structure of the transmission mechanism in the lifting device.

[0031] In summary, compared with the prior art, the lifting device and its locking mechanism provided by this utility model have the following beneficial effects:

[0032] This invention relates to a locking mechanism that addresses the issue of slippage in the transmission mechanism of a lifting device caused by screw slippage preventing self-locking. The transmission shaft and sliding locking plate are connected via a first engaging portion and a third engaging hole. The sliding locking plate is also connected to a fixed locking plate via a second engaging portion and a second engaging hole. The fixed locking plate is fixedly connected to a fixed support member, which in turn is fixedly connected to the first cylinder of the lifting device, thus achieving self-locking of the locking mechanism. The operator can only operate the screw to rotate and achieve lifting transmission after unlocking the locking mechanism using the drive component, thereby avoiding adverse consequences caused by mechanical slippage of the transmission mechanism. When the drive component is removed, the sliding locking plate can re-engage with the fixed locking plate under the action of the elastic element, restoring the self-locking function of the locking mechanism. Attached Figure Description

[0033] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the above and other features and advantages of the present invention, in which:

[0034] Figure 1 This is a schematic diagram of the overall lifting equipment;

[0035] Figure 2 This is a partial sectional view of the lifting equipment;

[0036] Figure 3 This is a schematic diagram of an explosion of the locking mechanism;

[0037] Figure 4 This is an exemplary structural diagram showing the locking mechanism in a self-locking state;

[0038] Figure 5 This is an exemplary structural diagram showing the locking mechanism in the unlocked state;

[0039] Figure 6 An exemplary structural diagram for restoring the locking mechanism to its self-locking state;

[0040] The accompanying figure is labeled as follows:

[0041] Detailed Implementation

[0042] To make the objectives, technical solutions and advantages of this utility model clearer, the following embodiments will be used to further describe this utility model in detail.

[0043] Combination Figure 1 and Figure 2 As shown, this embodiment provides a lifting device that can be used to lift CT equipment, etc. The lifting device includes a first cylinder 100, a drive shaft 200, a drive component 300, a bevel gear mechanism 400, a lead screw pair 500, and a second cylinder 600. The drive shaft 200 is disposed on the first cylinder 100, for example, at the top of the first cylinder 100. The bevel gear mechanism 400, the lead screw pair 500, and the second cylinder 600 are all disposed within the first cylinder 100. The input end 210 of the drive shaft 200 extends out of the first cylinder 100 for connection with the drive component 300, and the output end 220 of the drive shaft 200 (e.g., ...) is located within the first cylinder 100. Figure 3 As shown, the bevel gear mechanism 400 is connected, and the lead screw 510 in the lead screw pair 500 is connected to the bevel gear mechanism 400. The lead screw nut 520 is fixedly connected to the second cylinder 600.

[0044] The input end 210 of the drive shaft 200 is provided with a first engaging portion 211 along the circumferential direction (e.g., Figure 3 As shown, the output end 310 of the drive component 300 is provided with a first locking hole 311, which can engage with the first engaging part 211 to drive the transmission shaft 200 to rotate. This rotation is transmitted to the lead screw pair 500 through the bevel gear mechanism 400, causing the first cylinder 100 to move up and down outside the second cylinder 100, thus achieving a lifting action. During the lifting process, the bevel gear mechanism 400 drives the lead screw 510 to rotate, while the lead screw nut 520 remains stationary. The lead screw 510 rotates around the lead screw nut 520 while simultaneously moving up and down, thus enabling the lead screw 510 to lift the entire first cylinder 100 and perform a lifting action.

[0045] Because the bevel gear mechanism 400 has high efficiency, while the lead screw pair 500 has only average self-locking performance, when the lifting equipment vibrates due to movement, the lead screw 510 is prone to self-rotation and sliding, which affects the performance and safety of the lifting equipment.

[0046] Based on this, this embodiment provides a locking mechanism at the input end 210 of the drive shaft 200 to lock the drive shaft 200, which also prevents the bevel gear mechanism 400 and the lead screw 510 connected to it from rotating, thus locking the entire transmission mechanism and preventing slippage. Of course, the locking mechanism of this embodiment can also be applied to other suitable types of lifting or transmission equipment, and is not limited to the lifting equipment with the above structure.

[0047] Combination Figures 3-6 As shown, the locking mechanism includes: a fixed support member 10, a fixed locking plate 20, a sliding locking plate 30, and an elastic member 40.

[0048] The fixed support member 10 is fixedly connected to the first cylinder 100, and the fixed support member 10 has a through hole 11 along its axial direction for the output end 310 of the driving member 300 to pass through. Specifically, as shown... Figure 4 and Figure 1 As shown, the first cylinder 100 includes an input end cylinder 110 disposed around the input end 210 of the drive shaft 200, and a fixed support 10 is fixedly connected to the input end cylinder 110, thereby facilitating the installation and fixing of the fastener support 10.

[0049] The fixing locking piece 20 is fixedly connected to the fixing support 10, such as... Figure 3 As shown, the fixing locking plate 20 is fastened to the fixing support member 10 by screws. The fixing locking plate 20 is provided with a second locking hole 21, which allows the output end 310 of the driving member 300 to pass through. The output end 310 of the driving member 300 can pass through the through hole 11 and the second locking hole 21, and engage the first locking hole 311 with the first engaging part 211, thereby driving the transmission shaft 200 to rotate.

[0050] The sliding locking piece 30 is provided with a second engaging part 31 that protrudes toward the fixed locking piece 20, and a third locking hole 32 that is concentrically arranged with the second engaging part 31. The second engaging part 31 can engage with the second locking hole 21. When the sliding locking piece 30 is sleeved on the input end 210 of the transmission shaft 200, the third locking hole 32 engages with the first engaging part 211.

[0051] The elastic element 40 is sleeved on the input end 210 of the transmission shaft 200. One end of the elastic element 40 abuts against the sliding locking piece 30, and the other end abuts against the first cylinder 100. The elastic element 40 can be a return spring.

[0052] Thus, the drive shaft 200 and the sliding locking plate 30 can be connected to each other through the first engaging part 211 and the third locking hole 32, and the sliding locking plate 30 can be connected to the fixed locking plate 20 through the second engaging part 31 and the second locking hole 21. The fixed locking plate 20 is fixedly connected to the fixed support member 10, and the fixed support member 10 is fixedly connected to the first cylinder 100 of the lifting equipment.

[0053] In this embodiment, the locking mechanism can switch between a self-locking state and an unlocking state. When the second engaging portion 31 of the sliding locking piece 30 engages with the second locking hole 21, the locking mechanism is in a self-locking state. When the output end 310 of the driving member 300 pushes the sliding locking piece 30 until the second engaging portion 31 disengages from the second locking hole 21, the locking mechanism is in an unlocking state. When the driving member 300 is withdrawn, under the action of the elastic member 40, the second engaging portion 31 of the sliding locking piece 30 engages with the second locking hole 21, and the locking mechanism returns to the self-locking state.

[0054] Figure 4An exemplary structural diagram of the locking mechanism in a self-locking state is shown. At this time, the sliding locking plate 30 is pushed by the elastic member 40, which pushes the second engaging part 31 of the sliding locking plate 30 into the second locking hole 21 of the fixed locking plate 20 and locks it in place. Since the fixed locking plate 20 is fixed, the sliding locking plate 30 will also be locked together with the transmission shaft 200 and cannot rotate. This also prevents the bevel gear mechanism 400 and the lead screw 510 connected to it from rotating, thus locking the entire transmission mechanism and preventing the occurrence of self-slip.

[0055] Figure 5 An exemplary structural diagram of the locking mechanism in the unlocked state is shown. When unlocking is required for lifting movement, the drive member 300 is pushed forward, causing it to push open the sliding locking piece 30, which is pushed by the elastic member 40. The sliding locking piece 30 slides inward along the transmission shaft 200, and the second engaging part 31 finally disengages from the second locking hole 21 of the fixed locking piece 20. At this time, the sliding locking piece 30 is no longer restricted from the transmission shaft 200, and can be driven to rotate by the drive member 300, thereby driving the transmission mechanism to rotate and realizing the lifting of the lifting equipment. In this embodiment, as shown... Figure 1 As shown, the drive unit 300 is a manual wrench, including a handle and a socket head, wherein the socket head is the output end 310 of the drive unit 300. In other embodiments, the drive unit 300 may also be other suitable structures.

[0056] Figure 6 An exemplary structural diagram showing the locking mechanism returning to its self-locking state is shown. When the drive end 310 of the drive member 300 is withdrawn from any position, the elastic member 40 immediately pushes the sliding locking piece 30 against the fixed locking piece 20. If the lead screw 510 rotates or slides slightly, it will also drive the transmission shaft 200 to rotate slightly through the bevel gear mechanism 400. The rotation of the transmission shaft 200 will also drive the sliding locking piece 30 to rotate. When the second engaging part 31 of the sliding locking piece 30 aligns with the second locking hole 21 of the fixed locking piece 20, the second engaging part 31 of the sliding locking piece 30 will be immediately pushed into the second locking hole 21 of the fixed locking piece 20 by the elastic member 40, completely locking the sliding locking piece 30 so that it can no longer slide, thereby realizing the self-locking function.

[0057] Furthermore, the fixing locking plate 20 has a plurality of limiting notches 22 in its circumferential direction, and the fixing support member 10 has a plurality of limiting protrusions 12 in its circumferential direction that match the limiting notches 22. Through the cooperation of the limiting notches 22 and the limiting protrusions 12, the fixing locking plate 20 and the fixing support member 10 can be easily assembled and connected, and the rotation of the fixing locking plate 20 relative to the fixing support member 10 is restricted, thereby enhancing the connection strength between the two. In other embodiments, the fixing locking plate 20 and the fixing support member 10 can also be designed as a single piece to eliminate the risk of rotation of the fixing locking plate 20 relative to the fixing support member 10.

[0058] like Figure 3 As shown, the input end 210 of the drive shaft 200 extends out of the first cylinder 100, and the output end 310 of the drive member 300 is provided with a retaining pin 312 in the circumferential direction. The through hole 11 of the fixed support member 10 is provided with a groove 13 for the retaining pin 312 to pass through. Figure 4 As shown, the output end 310 of the drive component 300 has a circumferential locking hole 313 for mounting a locking pin 312. Only when the locking pin 312 is aligned with the locking groove 13 on the fixed support 10 can the output end 310 of the drive component 300 pass through the through hole 11 of the fixed support 10. This allows for a detachable connection of the drive component 300 and facilitates locking the drive component 300 within the fixed support 10, ensuring that the drive component 300 (i.e., the manual wrench) does not easily slip out or fall during lifting or not in operation, thus preventing potential injury or other problems. Figure 4 As shown, the end face of the fixed support member 10 facing the fixed locking piece 20 is recessed inward to form a receiving cavity 14, which is used to receive the output end 310 of the drive member 300 and the locking pin 312. The receiving cavity 14 provides the range of motion of the locking pin 312 when the output end 310 of the drive member 300 rotates, ensuring that the locking pin 312 will not interfere with the fixed support member 10.

[0059] The input end 210 of the drive shaft 200 is provided with a guide support 212. The guide support 212 is located between the first engaging part 211 and the end face of the input end 210 of the drive shaft 200. It is used to guide the drive member 300 to align the first locking hole 311 with the first engaging part 211 of the drive shaft 200 by free rotation. This allows the drive member 300 to continue pushing the sliding locking piece 30 forward to perform lifting and lowering operations. It can also support the output end 310 of the drive member 300 when the first locking hole 311 of the drive member 300 exits the first engaging part 211, so that the drive member 300 can freely rotate to align with the slot 13 of the fixed support member 10 and thus smoothly exit from the receiving cavity 14 of the fixed support member 10.

[0060] In this embodiment, the first engaging portion 211 can be a hexagonal engaging platform, and correspondingly, the first engaging hole 311 and the third engaging hole 32 are hexagonal holes, thereby making the engagement between the drive shaft 200, the drive member 300, and the sliding locking piece 30 more reliable. In other embodiments, other irregularly shaped engaging platforms and holes can also be used, such as pentagons, quadrilaterals, etc., as long as they can achieve engagement between the drive shaft 200, the drive member 300, and the sliding locking piece 30 and restrict or drive the rotation of the drive shaft 200.

[0061] The second engaging portion 31 can be a hexagonal boss, and correspondingly, the second engaging hole 21 is a hexagonal hole. This makes the engagement between the sliding locking piece 30 and the fixed locking piece 20 more reliable, thereby restricting the rotation of the sliding locking piece 30 in the self-locking state. In other embodiments, other forms of irregularly shaped bosses and holes can also be used, such as pentagons, quadrilaterals, etc., as long as they can achieve engagement between the sliding locking piece 30 and the fixed locking piece 20 and restrict rotation.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A locking mechanism, characterized in that, The device is applied to a lifting equipment, which includes a first cylinder, a drive shaft, and a drive component. The drive shaft is disposed on the first cylinder, and the input end of the drive shaft is provided with a first engaging portion along the circumference. The output end of the drive component is provided with a first locking hole. The locking mechanism includes: A fixed support member is fixedly connected to the first cylinder body, and the fixed support member is provided with a through hole along its axial direction for the output end of the drive member to pass through; A fixing locking plate is fixedly connected to the fixing support member. The fixing locking plate is provided with a second locking hole, which allows the output end of the driving member to pass through. The output end of the driving member can pass through the through hole and the second locking hole and engage with the first locking hole and the first engaging part. The sliding locking piece has a second engaging portion protruding towards the fixed locking piece, and a third locking hole concentrically disposed with the second engaging portion. The second engaging portion can engage with the second locking hole. When the sliding locking piece is sleeved on the input end of the transmission shaft, the third locking hole engages with the first engaging portion. An elastic element is sleeved on the input end of the transmission shaft, with one end of the elastic element abutting against the sliding locking piece and the other end abutting against the first cylinder.

2. The locking mechanism according to claim 1, characterized in that, The second engaging portion of the sliding lock piece engages with the second locking hole, and the locking mechanism is in a self-locking state; The output end of the driving component pushes the sliding locking piece to disengage from the second engaging part and the second locking hole, and the locking mechanism is in the unlocked state; When the driving member is withdrawn, under the action of the elastic member, the second engaging portion of the sliding lock piece engages with the second locking hole, and the locking mechanism returns to its self-locking state.

3. The locking mechanism according to claim 1, characterized in that, The fixing locking piece has several limiting notches in its circumferential direction, and the fixing support has several limiting protrusions in its circumferential direction that match the limiting notches.

4. The locking mechanism according to claim 1, characterized in that, The fixed support and the fixed locking plate are designed as a single integrated part.

5. The locking mechanism according to claim 1, characterized in that, The input end of the drive shaft extends out of the first cylinder, and the output end of the drive member is provided with a locking pin in the circumferential direction. The through hole of the fixed support member is provided with a slot for the locking pin to pass through. The end face of the fixed support member facing the fixed locking piece is recessed inward to form a receiving cavity. The receiving cavity is used to accommodate the output end of the drive member and the locking pin.

6. The locking mechanism according to claim 5, characterized in that, The input end of the drive shaft is provided with a guide support portion, which is located between the first engaging portion and the end face of the input end of the drive shaft. The guide support portion is used to guide the drive member to align the first locking hole with the first engaging portion of the drive shaft by free rotation, and to support the output end of the drive member when the first locking hole of the drive member is disengaged from the first engaging portion, and to guide the drive member to align the locking pin with the locking groove by free rotation, so as to realize the disengagement of the drive member.

7. The locking mechanism according to claim 1, characterized in that, The first engaging part is a hexagonal locking platform, and the first locking hole and the third locking hole are hexagonal holes.

8. The locking mechanism according to claim 1, characterized in that, The second engaging part is a hexagonal boss, and the second engaging hole is a hexagonal hole.

9. A lifting device, characterized in that, include: First cylinder; A drive shaft is disposed in the first cylinder, and the input end of the drive shaft is provided with a first engaging part along the circumferential direction; The drive unit has a first locking hole at its output end, which can be engaged with the first engaging part to drive the transmission shaft to rotate; The locking mechanism as described in any one of claims 1 to 8 is disposed at the input end of the transmission shaft.

10. The lifting device according to claim 9, characterized in that, The input end of the drive shaft extends out of the first cylinder, and the first cylinder includes an input end cylinder arranged around the input end of the drive shaft, and the fixed support is fixedly connected to the input end cylinder.

11. The lifting device according to claim 9, characterized in that, It also includes a bevel gear mechanism, a lead screw pair, and a second cylinder. The bevel gear mechanism, the lead screw pair, and the second cylinder are all located inside the first cylinder. The output end of the transmission shaft is connected to the bevel gear mechanism. The lead screw in the lead screw pair is connected to the bevel gear mechanism, and the lead screw nut is connected to the second cylinder.

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