Lifting anti-tripping locking device

Abstract

The utility model discloses a lifting anti-tripping locking device which comprises a supporting frame, a special-shaped groove lifting rod and an anti-tripping mechanism, the special-shaped groove lifting rod is vertically and movably connected with the supporting frame, at least one set of limiting clamping grooves are formed in the outer wall of the special-shaped groove lifting rod in the circumferential direction, and the limiting clamping grooves are distributed in the axial direction of the special-shaped groove lifting rod. The anti-tripping mechanism is arranged in the middle of the special-shaped groove lifting rod, and the bottom of the anti-tripping mechanism is movably connected with the supporting frame. The anti-tripping mechanism comprises a push plate, an anti-tripping supporting seat and a movable tongue, a through hole is formed in the push plate, the special-shaped groove lifting rod penetrates through the through hole, the anti-tripping supporting seat is arranged on the edge of the through hole, the middle of the movable tongue is movably installed on the anti-tripping supporting seat through a connecting pin, and the inner side of the movable tongue movably abuts against the limiting clamping groove. The special-shaped groove lifting rod is matched with the anti-tripping mechanism in an abutting mode, when the special-shaped groove lifting rod is out of control and falls, the anti-tripping mechanism and the limiting clamping groove of the special-shaped groove lifting rod form clamping fixing, locking in the falling process is achieved, and the protection effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic gate operation protection, in particular to a lifting and anti-gate-dropping locking device. Background Art

[0002] The gate releases and blocks water by lifting and lowering the gate plate and the base. At present, the water inlet regulating gate of the water plant pool is often in the form of a worm gear lifting the gate plate, but the worm gear type adjustment mechanism is only suitable for places where the adjustment is not frequent. When the adjustment is made more than ten times per minute, failures occur frequently, and the inspection and replacement of accessories requires the handling of the entire gate plate machinery, which is very dangerous and inconvenient.

[0003] Usually, when the gate is lifted, a locking structure is required to lock it to prevent the gate from falling and being unable to drain water, and to prevent the motor from being damaged by the action of gravity on the motor output shaft for a long time. Although the locking structure in the prior art can also achieve the function of fixing the gate at any height, the effect of lifting the gate at any time and automatically locking the gate is usually achieved by cooperating with gears and pawls in the transmission. In this way, when the gate is closed due to factors such as lifting power or transmission failure, it is difficult to lock it again when the gate accidentally falls due to gravity, so another protection mechanism is needed for protection. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that it is difficult to effectively lock a gate plate when the gate plate accidentally falls due to gravity due to factors such as lifting power or transmission failure, and to provide a lifting anti-drop gate locking device.

[0005] In order to achieve the above-mentioned purpose, the utility model is specifically realized through the following technical solutions:

[0006] A lifting anti-brake locking device comprises a support frame, a profiled groove lifting rod and an anti-brake mechanism, wherein the profiled groove lifting rod is vertically movably connected to the support frame, at least one set of limit slots is circumferentially arranged on the outer wall of the profiled groove lifting rod, and the limit slots are arranged axially along the profiled groove lifting rod, and the anti-brake mechanism is arranged in the middle of the profiled groove lifting rod, and its bottom is movably connected to the support frame;

[0007] The anti-brake drop mechanism includes a push plate, an anti-brake drop support seat and a movable tongue. A through hole is provided on the push plate, and the special-shaped groove lifting rod passes through the through hole. The anti-brake drop support seat is arranged at the edge of the through hole. The middle part of the movable tongue is movably installed on the anti-brake drop support seat through a connecting pin, and the inner side of the movable tongue is movably abutted against the limit slot.

[0008] Furthermore, the cross section of the limiting slot is a ratchet-shaped trapezoid inclined downward.

[0009] Furthermore, a lifting mechanism is vertically installed on the top of the special-shaped groove lifting rod through a buffer mechanism, and the lifting mechanism is installed on the support frame.

[0010] Furthermore, the lifting mechanism is an oil cylinder, which includes a cylinder body and a piston rod. The cylinder body is fixedly installed on the support frame, and the piston rod is vertically telescopically installed at the bottom of the cylinder body. The bottom of the piston rod is connected to the top of the special-shaped groove lifting rod through a buffer mechanism.

[0011] Furthermore, the buffer mechanism includes an upper damping chuck, a damping spring, a lower damping chuck and a limit pin. An elongated pin hole is opened at the bottom of the lifting mechanism. The top of the special-shaped groove lifting rod is connected to the bottom of the lifting mechanism through the limit pin and the elongated pin hole. The lower damping chuck is fixed to the bottom of the lifting mechanism. The damping spring and the upper damping chuck are installed in sequence on the top surface of the lower damping chuck. The upper damping chuck forms a limit connection with the limit pin.

[0012] Furthermore, a gate plate is fixedly installed at the bottom end of the special-shaped groove lifting rod.

[0013] Furthermore, a protrusion is provided on the inner side of the movable tongue, and the top and bottom surfaces of the protrusion are both inclined surfaces, and the inner side thereof abuts against the outer wall of the lifting rod of the special-shaped groove.

[0014] Furthermore, a manual lifting mechanism is installed at the bottom of the push plate, and the manual lifting mechanism includes a lifting screw, a gear box and a lifting handwheel. The gear box is fixed on the support frame, the lifting handwheel is installed on the outside of the gear box, the middle part of the lifting screw is connected to the gear box transmission, and the top of the lifting screw is fixedly connected to the push plate.

[0015] The utility model utilizes the abutment and cooperation of the profiled groove lifting rod and the anti-drop gate mechanism. When the profiled groove lifting rod of the lifting gate falls at a normal speed, no locking will occur. When the profiled groove lifting rod falls out of control, the bottom of the movable tongue of the anti-drop gate mechanism is bounced open due to the inertia of the collision, and the top of the movable tongue tilts inward to form a fixed position with the limit slot of the profiled groove lifting rod, thereby achieving locking during the fall and playing a protective role. The manual lifting mechanism is used to lift and release the locking gate plate to prevent the fault from affecting the normal lifting and falling action of the gate plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0017] Figure 2 It is a partial enlarged view of an embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of a working state of the brake-dropping prevention mechanism in an embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of another working state of the brake-dropping prevention mechanism in the embodiment of the utility model;

[0020] Figure 5 This is an enlarged schematic diagram of the buffer mechanism in the embodiment of the utility model;

[0021] Figure 6 It is a schematic diagram of the partially disassembled structure of the piston rod and the buffer mechanism in the embodiment of the utility model.

[0022] In the figure, 1-support frame; 2-lifting mechanism; 21-oil cylinder; 211-cylinder body 212-piston rod; 22-long pin hole; 3-special-shaped groove lifting rod; 31-limiting slot; 4-gate; 5-anti-brake drop mechanism; 51-push plate; 511-through hole; 52-anti-brake drop support seat; 53-movable tongue; 531-protrusion; 54-connecting pin; 6-buffer mechanism; 61-upper damping chuck; 62-damping spring; 63-lower damping chuck; 64-limiting pin; 7-oil supply module; 8-manual lifting mechanism; 81-lifting screw; 82-gear box; 83-lifting handwheel. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0025] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0028] like Figures 1 to 6 As shown, the utility model provides a lifting anti-brake locking device, including a support frame 1, a special-shaped groove lifting rod 3 and an anti-brake mechanism 5, the special-shaped groove lifting rod 3 is vertically movably connected to the support frame 1, at least one group of limiting card grooves 31 are circumferentially provided on the outer wall of the special-shaped groove lifting rod 3, and the limiting card grooves 31 are arranged axially along the special-shaped groove lifting rod 3, and the anti-brake mechanism 5 is arranged in the middle of the special-shaped groove lifting rod 2, and its bottom is movably connected to the support frame 1;

[0029] The anti-brake-dropping mechanism 5 includes a push plate 51, an anti-brake-dropping support seat 52 and a movable tongue 53. A through hole 511 is provided on the push plate 51, and the special-shaped groove lifting rod 3 passes through the through hole 511. The anti-brake-dropping support seat 52 is arranged at the edge of the through hole 511. The middle part of the movable tongue 53 is movably installed on the anti-brake-dropping support seat 52 through a connecting pin 54, and the inner side of the movable tongue 53 is movably abutted against the limit slot 31.

[0030] Preferably, the cross section of the limit slot 31 is a ratchet-shaped trapezoid inclined downward. When the profiled slot lifting rod 3 is in normal operation, the abutment process between the movable tongue 53 and the limit slot 31 is smooth and without bounce. When the profiled slot lifting rod 3 loses weight and falls, the protruding part of the limit slot 31 bounces up the abutment end of the movable tongue 53, and the other end of the movable tongue 53 is stuck in the inner top surface of one of the limit slots 31 to form a lock.

[0031] Preferably, a lifting mechanism 2 is vertically installed on the top of the special-shaped groove lifting rod 3 through a buffer mechanism 6, and the lifting mechanism 2 is installed on the support frame 1, thereby realizing the vertical movable installation of the special-shaped groove lifting rod 3 on the support frame 1 to achieve lifting and falling actions.

[0032] Preferably, the lifting mechanism 2 is an oil cylinder 21, which includes a cylinder body 211 and a piston rod 212. The cylinder body 211 is fixedly mounted on the support frame 1, and the piston rod 212 is vertically telescopically mounted at the bottom of the cylinder body 211. The bottom of the piston rod 211 is connected to the top of the special-shaped groove lifting rod 3 through a buffer mechanism 6.

[0033] Preferably, the buffer mechanism 6 includes an upper damping chuck 61, a damping spring 62, a lower damping chuck 63 and a limit pin 64. An elongated pin hole 22 is opened at the bottom of the lifting mechanism 2. The top of the special-shaped groove lifting rod 3 is connected to the bottom of the lifting mechanism 2 through the limit pin 64 and the elongated pin hole 22. The lower damping chuck 63 is fixed to the bottom of the lifting mechanism 2. The damping spring 62 and the upper damping chuck 61 are installed on the top surface of the lower damping chuck 63 in sequence. The upper damping chuck 61 forms a limit connection with the limit pin 64.

[0034] Preferably, a gate plate 4 is fixedly mounted on the bottom end of the special-shaped groove lifting rod 3 .

[0035] Preferably, the inner side of the movable tongue 53 has a protrusion 531 , the top and bottom surfaces of the protrusion 531 are both inclined surfaces, and the inner side thereof abuts against the outer wall of the special-shaped groove lifting rod 3 .

[0036] Preferably, a manual lifting mechanism 8 is installed at the bottom of the push plate 51, and the manual lifting mechanism 8 includes a lifting screw 81, a gear box 82 and a lifting handwheel 83. The gear box 82 is fixed on the support frame 1, and the lifting handwheel 83 is transmission-installed on the outside of the gear box 82. The middle part of the lifting screw 81 is transmission-connected to the gear box 82, and the top of the lifting screw 81 is fixedly connected to the push plate 51. By manually rotating the lifting handwheel 83, the push plate 51 is pushed up or down, thereby driving the locked state special-shaped groove lifting rod 3 to move up and down, ensuring that the lifting and falling action in a fault state continues to be controllable.

[0037] The embodiment is a water inlet gate opening adjustment device with a lifting and anti-drop gate locking device of the utility model, comprising a support frame 1, a lifting mechanism 2, a profiled groove lifting rod 3, a gate plate 4 and an anti-drop gate mechanism 5, wherein the lifting mechanism 2 is mounted on the support frame 1, the profiled groove lifting rod 3 is vertically mounted at the bottom of the lifting mechanism 2 through a buffer mechanism 6, and the gate plate 4 is fixedly mounted at the bottom of the profiled groove lifting rod 3; the profiled groove lifting rod 3 is provided with a circumferentially arranged limit groove 31 on the outer periphery and arranged along the axial direction, and preferably, the cross section of the limit groove 31 is a ratchet-shaped trapezoid inclined downward. The anti-drop gate mechanism 5 is mounted in the middle of the profiled groove lifting rod 3, and its inner side abuts against the limit groove 31.

[0038] The utility model utilizes the lifting mechanism 2 to lift and lower the gate plate 4, and utilizes the abutment and cooperation between the special-shaped groove lifting rod 3 and the anti-brake drop mechanism 5 to play an anti-brake drop protection role. When the gate plate 4 falls at a normal speed under the control of the lifting mechanism 2, no locking will occur. When the gate plate 4 falls out of control, the anti-brake drop mechanism 5 is activated and engages with the limit slot 31 of the special-shaped groove lifting rod 3 to form a downward one-way lock.

[0039] In a preferred embodiment, the lifting mechanism 2 is an oil cylinder 21, which includes a cylinder body 211 and a piston rod 212. The cylinder body 211 is fixedly mounted on the support frame 1 and is connected to the oil supply module 7. The piston rod 212 is vertically telescopically mounted at the bottom of the cylinder body 211, and the bottom of the piston rod 212 is connected to the top of the special-shaped groove lifting rod 3 through the buffer mechanism 6.

[0040] The oil supply module 7 outputs high-pressure oil from the motor oil pump, and the up and down movement of the piston rod 212 of the oil cylinder 21 is realized by extending the oil pipe and retracting the oil pipe. The piston rod 212 is connected to the special-shaped groove lifting rod 3, thereby driving the up and down movement of the gate plate 4. The up and down movement of the gate plate 4 will directly affect the amount of water inlet, and finally realize the adjustability of the opening size of the reclaimed water inlet gate.

[0041] In a preferred embodiment, the brake-drop prevention mechanism 5 includes a push plate 51, a brake-drop prevention support seat 52 and a movable tongue 53. The push plate 51 is provided with a through hole 511, the profiled groove lifting rod 3 passes through the through hole 511, the brake-drop prevention support seat 52 is arranged at the edge of the through hole 511, and the connecting pin 54 passing through the middle of the movable tongue 53 is movably installed on the support seat. Preferably, the movable tongue 53 has a protrusion 531 on the inner side, and the top and bottom surfaces of the protrusion 531 are both inclined surfaces, and the inner side thereof abuts against the outer wall of the profiled groove lifting rod 3.

[0042] Preferably, the cross section of the limit slot 31 is a ratchet-shaped trapezoid inclined downward. In the normal state, the inner bottom of the movable tongue 53 abuts against the limit slot 31, and when the profiled groove lifting rod 3 is in normal operation, the abutment process between the movable tongue 53 and the limit slot 31 is smooth and without bounce. When the profiled groove lifting rod 3 loses weight and falls, the protruding part of the limit slot 31 bounces the abutting end of the movable tongue 53 due to the inertia of the collision, and the top of the movable tongue 53 tilts inward, and the other end of the movable tongue 53 is inserted into the inner top surface of one of the limit slots 31, and the top of the movable tongue 53 is fixed with the limit slot 31, thereby realizing one-way locking during the fall, which plays a protective role.

[0043] In a specific embodiment, when the special-shaped groove lifting rod 3 descends at a normal speed (≤5mm / s), since the protrusion 531 of the movable tongue 53 adopts a slope design, the limit slot 31 of the special-shaped groove lifting rod 3 will not be stuck when it contacts the protrusion 531 of the movable tongue 53 of the anti-drop gate mechanism 5, and the special-shaped groove lifting rod 3 can drive the gate plate to move up and down normally. The upper part of the movable tongue 53 always maintains a distance of at least 5mm less than the special-shaped groove lifting rod 3, so the special-shaped groove lifting rod 3 will not be stuck at a normal speed.

[0044] However, in the case of a fault (such as a power system failure, etc.), the profiled groove lifting rod 3 will drop rapidly under the action of gravity, and the limit slot 3 of the profiled groove lifting rod 3 will touch the protrusion 531 of the movable tongue 53 during the sliding process. The movable tongue 53 will be bounced open due to inertia, and then the upper part of the movable tongue 53 will tilt inward and enter the limit slot 31 of the profiled groove lifting rod 3, forming a fixed position with the limit slot 31, thereby firmly locking the profiled groove lifting rod 3 to prevent it from falling. When it needs to be released, the profiled groove lifting rod 3 can only be manually intervened to first rise, and then slowly lowered to release the lock.

[0045] In the embodiment, the buffer mechanism 6 preferably includes an upper damping chuck 61, a damping spring 62, a lower damping chuck 63 and a limiting pin 64. The upper damping chuck 61 and the lower damping chuck 63 are provided with through holes to realize the through connection between the piston rod 212 and the special-shaped groove lifting rod 3. In the embodiment, an elongated pin hole 22 is provided at the bottom of the piston rod 212 or a connecting member is fixed to open a long pin hole on the connecting member; the top of the special-shaped groove lifting rod 3 passes through the lower damping chuck 63 and is connected to the bottom of the piston rod 212 by the limiting pin 64 and the elongated pin hole 22. The lower damping chuck 63 is fixed to the bottom of the piston rod 212. The damping spring 62 and the upper damping chuck 61 are installed on the top surface of the lower damping chuck 63 in sequence. The damping spring 62 and the upper damping chuck 61 are movably sleeved on the outside of the piston rod 212. The upper damping chuck 61 forms a limiting connection with the limiting pin 64.

[0046] The lower damping chuck 63 can be threadedly fixedly connected to the bottom of the piston rod 212. When the piston rod 212 of the oil cylinder is rising, the lower damping chuck 63 will move therewith, and the lower damping chuck 63 will push the upper damping spring 62, and the damping spring 62 is blocked by the upper damping chuck 61. The upper damping chuck 61 cannot move due to the obstruction of the limit pin 64, and the limit pin 64 is larger than the diameter of the piston rod 212, the special-shaped groove lifting rod 3 and the through hole of the upper damping chuck 61 in the length direction, and the elongated pin hole 22 is an upper and lower elongated hole, so the limit pin 64 can move up and down by 10 mm, and the damping spring 62 will undergo elastic deformation under the pulling force of the piston rod 212 and the gravity of the special-shaped groove lifting rod 3, offsetting part of the hard force during the lifting and falling process of the gate plate 4, playing a buffering and protective role, and reducing equipment deformation failures.

[0047] Preferably, a manual lifting mechanism 8 is installed at the bottom of the push plate 51, specifically installed on both sides of the bottom surface of the push plate 51, for horizontally pushing the push plate 51 upward. The manual lifting mechanism includes a lifting screw 81, a gear box 82 and a lifting hand wheel 83, the gear box 82 is fixed on the support frame 1, the lifting hand wheel 83 is transmission-mounted on the outside of the gear box 82, the middle of the lifting screw 81 is transmission-connected to the gear box 82, and the top of the lifting screw 81 is fixedly connected to the push plate 51.

[0048] The manual lifting mechanism 8 is fixed on the support frame 1, and the lifting hand wheel 83 is used to realize the manual rotation of the hand wheel to drive the lifting screw 81 to move up and down, and the lifting screw 81 further drives the push plate 51 to move up and down. When the lifting mechanism 2 cannot provide normal lifting force due to insufficient power or other reasons, the piston rod 212 of the oil cylinder, the buffer mechanism 6 and the profiled groove lifting rod 3 are vertically pulled down by the gate plate 4 due to gravity until the lower damping chuck 63 is completely in contact with the push plate 51. At this time, the manual operation of the push plate 51 of the anti-dropping mechanism 5 will drive the gate plate 4 to move up and down through the lower damping chuck 63 and the profiled groove lifting rod 3 to realize manual operation.

[0049] The specific embodiments in the present invention are merely explanations of the present invention, and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A lifting anti-brake locking device, characterized in that: It comprises a support frame (1), a profiled groove lifting rod (3) and an anti-brake drop mechanism (5), wherein the profiled groove lifting rod is vertically movably connected to the support frame, at least one group of limit slots (31) are circumferentially arranged on the outer wall of the profiled groove lifting rod, and the limit slots are arranged axially along the profiled groove lifting rod, and the anti-brake drop mechanism is arranged in the middle of the profiled groove lifting rod, and its bottom is movably connected to the support frame; The anti-brake-drop mechanism comprises a push plate (51), an anti-brake-drop support seat (52) and a movable tongue (53); a through hole (511) is provided on the push plate, a special-shaped groove lifting rod passes through the through hole, the anti-brake-drop support seat is arranged at the edge of the through hole, the middle part of the movable tongue is movably mounted on the anti-brake-drop support seat through a connecting pin (54), and the inner side of the movable tongue is movably abutted against the limit slot.

2. The lifting anti-brake locking device according to claim 1 is characterized in that: The cross section of the limit slot is a ratchet-shaped trapezoid inclined downward.

3. The lifting anti-brake locking device according to claim 1 is characterized in that: A lifting mechanism (2) is vertically installed on the top of the special-shaped groove lifting rod through a buffer mechanism (6), and the lifting mechanism is installed on the support frame.

4. The lifting anti-brake locking device according to claim 3 is characterized in that: The lifting mechanism is an oil cylinder (21), which comprises a cylinder body (211) and a piston rod (212). The cylinder body is fixedly mounted on a support frame, and the piston rod is vertically telescopically mounted on the bottom of the cylinder body. The bottom of the piston rod is connected to the top of the special-shaped groove lifting rod through a buffer mechanism.

5. The lifting anti-brake locking device according to claim 3, characterized in that: The buffer mechanism comprises an upper damping chuck (61), a damping spring (62), a lower damping chuck (63) and a limiting pin (64); a long pin hole (22) is provided at the bottom of the lifting mechanism; the top of the special-shaped groove lifting rod is connected to the bottom of the lifting mechanism through the limiting pin and the long pin hole; the lower damping chuck is fixed to the bottom of the lifting mechanism; the damping spring and the upper damping chuck are sequentially installed on the top surface of the lower damping chuck; the upper damping chuck forms a limiting connection with the limiting pin.

6. The lifting anti-brake locking device according to claim 1, characterized in that: A gate plate (4) is fixedly mounted on the bottom end of the special-shaped groove lifting rod.

7. The lifting anti-brake locking device according to claim 1, characterized in that: The inner side of the movable tongue is provided with a protrusion (531), the top surface and the bottom surface of the protrusion are both inclined surfaces, and the inner side thereof abuts against the outer wall of the special-shaped groove lifting rod.

8. The lifting anti-brake locking device according to claim 1, characterized in that: A manual lifting mechanism (8) is installed at the bottom of the push plate, and the manual lifting mechanism includes a lifting screw (81), a gear box (82) and a lifting hand wheel (83). The gear box is fixed on the support frame, and the lifting hand wheel is installed on the outside of the gear box. The middle part of the lifting screw is connected to the gear box, and the top of the lifting screw is fixedly connected to the push plate.

Images