Hydraulic lifting platform with early warning fence

Abstract

The utility model relates to a hydraulic lifting platform with an early warning fence. The hydraulic lifting platform comprises a plurality of stand columns fixedly arranged on a lifting platform, assembly blocks fixedly arranged at the upper ends of at least two pairs of stand columns on the front side and the rear side respectively, swing arms matched with the assembly blocks in a pivot mode, and two movable stop levers with the two ends connected with the free ends of the two pairs of swing arms on the front side and the rear side respectively. And a positioning block is arranged on the assembly block and is matched with the pivot end of the swing arm, so that the swing arm can be kept in an upward inclined extending state towards the inner side of the protective fence relative to the upright post, and meanwhile, the swing arm can rotate towards the outer side of the protective fence relative to the upright post. And a sensing assembly and an alarm are arranged on the assembly block. The sensing assembly is matched with the pivot end of the swing arm, and the sensing assembly can generate a sensing signal when the swing arm rotates. According to the lifting platform, when an operator is excessively close to the operation side edge of the lifting platform, the operator can be reminded in time, the safety of the operator can be guaranteed, and accidents are effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hydraulic lifting platform with early warning fence. BACKGROUND

[0002] Lifting platform is often used in high-altitude operation field, and requires the operator to stand on the lifting platform and send the lifting platform to the height position required by operation through the hydraulic lifting system. The existing lifting platform is usually provided with protective fences around the lifting platform to protect and prevent falling. However, the height of the protective fence cannot be too high, otherwise it will affect the construction of the operator. Therefore, there is a risk of falling from the lifting platform when the operator is too close to the edge of the operation side of the lifting platform, and it is easy to happen in the case that the operator is too focused on the work in hand and excessively stretches out his hand to operate. In operation, the operator generally takes the length direction (i.e. transverse direction) of the lifting platform as the operation side, as shown in the figure, so at least the protective structure of the transverse direction of the lifting platform needs to be improved. Figure 1 SUMMARY

[0003] The utility model provides a hydraulic lifting platform with early warning fence, which can timely remind the operator when the operator is too close to the edge of the operation side of the lifting platform, and is helpful to ensure the safety of the operator and effectively avoid accidents.

[0004] The utility model solves the technical scheme that the technical scheme taken by the utility model is: the hydraulic lifting platform with early warning fence, including the protective fence fixedly arranged on the lifting platform. The protective fence includes the stand column fixedly arranged at the four corner positions of the lifting platform, the plurality of transverse cross bars fixedly connected between the stand columns on the front side and the stand columns on the back side respectively, and the plurality of longitudinal cross bars fixedly connected between the stand columns on the left side and the stand columns on the right side respectively.

[0005] Further comprising the assembly block fixedly arranged at the upper end of at least two stand columns on the front side, the upper end of two stand columns on the back side respectively, the swing arm pivotally matched with each assembly block respectively, and the two movable blocking rods connected with the free end of two swing arms on the front side and the free end of two swing arms on the back side respectively.

[0006] The positioning block is arranged on the assembly block, and the positioning block is matched with one end of the swing arm pivotally connected with the assembly block, so that the swing arm can be kept in the state of upwardly inclined extension relative to the stand column towards the inner side of the protective fence, and the swing arm can also make the rotating action relative to the stand column towards the outer side of the protective fence.

[0007] The sensing assembly and the alarm are arranged on the assembly block and connected with each other, and the alarm can be selected as the audible and visual alarm. The sensing assembly is matched with one end of the swing arm pivotally connected with the assembly block, and the swing arm can cause the sensing assembly to generate the sensing signal when rotating relative to the stand column, and the alarm can be caused to alarm.​

[0008] Optionally, a U-shaped arm is formed on the upper part of the assembling block, and the swing arm is pivotally matched with the upper ends of the two arm plates of the U-shaped arm. A circular arc light surface I, a tooth surface and an upright surface are formed on the pivotal end of the swing arm. The outer diameter of the tooth surface is larger than that of the circular arc light surface I, the upright surface is located between the circular arc light surface I and the tooth surface, and the circular arc light surface I is located on the outer side of the tooth surface.

[0009] The positioning block is fixed relative to the lower part of the U-shaped arm. In the initial state, the lower part of the side surface of the positioning block facing the pivotal end of the swing arm is in contact with the upright surface, and the upper part is formed with a circular arc light surface II, and the circular arc light surface II is in contact with the lower part of the circular arc light surface I. In the process of the swing arm rotating relative to the column, the circular arc light surface II can keep in contact with the circular arc light surface I, and the upper part side of the circular arc light surface I will be close to the circular arc light surface II.

[0010] The sensing assembly comprises a rack part, a base fixed at the root of the U-shaped arm and a sensing component provided on the base.

[0011] The rack body of the rack part is arranged obliquely relative to the U-shaped arm, and is matched with the base through a linear slide rail structure and can be matched with the tooth surface. A transmission rod capable of being matched with the sensing component is formed on the outer end side of the rack body of the rack part, and a spring is sleeved on the end part of the transmission rod. When the tooth surface drives the rack part to move, the transmission rod can synchronously move to make the sensing component generate a sensing signal and cause the spring to be deformed in extension and contraction.

[0012] Optionally, the sensing component comprises a cylinder part fixed on the base, a sleeve and a sensor body. The sensor body is fixed on the cylinder part.

[0013] The free end of the transmission rod extends obliquely outward and downward after passing through the cylinder cavity of the cylinder part, and is provided with a radial flange. The sleeve is sleeved on the transmission rod, and the two ends of the spring are in contact with the radial flange and one end of the sleeve respectively. The other end of the sleeve extends to the cylinder part and can be matched with the sensor body.

[0014] Optionally, the sensor body is a pressure sensor, and the pressure sensor is fixed in the cylinder cavity of the cylinder part (81). The other end of the sleeve extends into the cylinder part, and the end face thereof is in contact with the pressure sensor.

[0015] Optionally, an elastic layer is fixed on the upright surface 43.

[0016] The hydraulic lifting platform with the early warning fence has the advantages that the safety early warning function can be provided, an alarm prompt can be given when an operator excessively approaches the edge of the lifting platform, the operator can be timely alerted, and the standing position of the operator can be adjusted. Therefore, the hydraulic lifting platform with the early warning fence has the advantages of improving operation safety and effectively avoiding accidents. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The top view structure schematic diagram of the utility model.

[0018] Figure 2 It is the partial section structure schematic diagram of the matching of assembly block, swing arm, positioning block, rack part and base etc.

[0019] Figure 3 It is Figure 2 The local enlarged structure schematic diagram of A in the middle.

[0020] Figure 4 It is the section structure schematic diagram of the matching of transmission rod, sleeve pipe etc. and pressure sensor.

[0021] In the drawing: 10 lifting platform, 20 guardrail, 21 vertical column, 22 transverse cross bar, 23 longitudinal cross bar, 30 assembly block, 31 U-shaped arm, 40 swing arm, 41 circular arc light surface one, 42 tooth surface, 43 vertical surface, 50 movable blocking rod, 60 positioning block, 61 circular arc light surface two, 70 rack part, 71 transmission rod, 711 radial flange, 72 spring, 80 base, 81 cylinder part, 811 pressure sensor, 82 sleeve pipe. DETAILED DESCRIPTION

[0022] The structure, proportion, size etc. shown in the drawing of the specification are only used to cooperate the content disclosed in the specification, to be understood and read by the person skilled in the art, and not to limit the limiting conditions of the utility model that can be implemented, so it does not have the substantial meaning in technology, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect that can be produced by the utility model and the purpose that can be achieved, should still fall within the range that can be covered by the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "front", "rear", "intermediate" etc. cited in the specification, are only for the convenience of clear understanding of the description, and not to limit the range of the utility model that can be implemented, the change or adjustment of relative relationship, without substantial change of technical content, is also regarded as the scope of the utility model that can be implemented.

[0023] As Figures 1 to 4 The hydraulic lifting platform with early warning fence shown in the drawing, including the guardrail 20 fixedly arranged on the lifting platform 10, the assembly block 30 fixedly arranged at the upper end of the two vertical columns 21 on the front side respectively, the assembly block 30 fixedly arranged at the upper end of the two vertical columns 21 on the rear side respectively, the swing arm 40 (four) pivotally matched with the four assembly blocks 30 respectively, and the two movable blocking rods 50 connected with the free end (upper end) of the two swing arms 40 on the front side and the free end (upper end) of the two swing arms 40 on the rear side respectively.

[0024] The guardrail 20 comprises upright posts 21 fixedly arranged at four corner positions of the lifting platform 10, a plurality of transverse crossbars 22 fixedly connected between the upright posts 21 on the front side respectively, a plurality of transverse crossbars 22 fixedly connected between the upright posts 21 on the rear side respectively, a plurality of longitudinal crossbars 23 fixedly connected between the upright posts 21 on the left side respectively, and a plurality of longitudinal crossbars 23 fixedly connected between the upright posts 21 on the right side respectively.

[0025] A positioning block 60 is fixedly arranged on the assembly block 30 and matches the pivot end (lower end) of the swing arm 40, so that the swing arm 40 can keep an upwardly inclined extending state relative to the upright post 21 towards the inner side of the guardrail 20, and can also make a rotating action relative to the upright post 21 towards the outer side of the guardrail 20. Therefore, in the initial state or in the normal state, the movable blocking rod 50 extends towards the inner side of the guardrail 20 and is located obliquely above the upright post 21. When the worker approaches the edge position (working side) of the lifting platform 10, the body will contact the movable blocking rod 50, and in the process of the worker continuously approaching the edge position (working side) of the lifting platform 10, the force acting on the movable blocking rod 50 by the body can drive the swing arm 40 to rotate in the vertical plane towards the outer side of the guardrail 20.

[0026] A torsional spring can be arranged on the matching pivot structure between the swing arm 40 and the assembly block 30, so that the torsional spring can drive the swing arm 40 to complete a reset action after rotating relative to the upright post 21 towards the outer side of the guardrail 20 and return to the initial state position. Or by keeping the swing arm 40 in an inclined state relative to the inner side of the guardrail 20, i.e. keeping the movable blocking rod 50 in a state of being located obliquely above the guardrail 20, the swing arm 40 can be reset under the action of gravity.

[0027] A sensing assembly and an alarm are arranged on the assembly block 30 and connected to each other. The sensing assembly matches the pivot end (lower end) of the swing arm 40, and can cause the sensing assembly to generate a sensing signal when the swing arm 40 rotates relative to the upright post 21, and can make the alarm send an alarm signal after processing by a controller to remind the worker. The sensor in the sensing assembly can be selected as a pressure sensor, and at this time, in the process of the swing arm 40 continuously rotating and moving relative to the upright post 21 towards the outer side, the pressure sensing signal of the pressure sensor will continuously increase, and when falling within a set early warning threshold range, the controller can make the alarm send an alarm signal.

[0028] A U-shaped arm 31 is formed on the upper portion of the assembling block 30, and the lower end (pivotal end) of the swing arm 40 is pivotally matched with the upper end of the two arm plates of the U-shaped arm 31, so that the swing arm 40 can rotate relative to the assembling block 30 or the column 21. A hole cylinder structure is formed on the lower portion of the assembling block 30, and the assembling block 30 is fixed to the upper end of the column 21 through the hole cylinder structure.

[0029] A circular arc light surface one 41, a tooth surface 42 and a vertical surface 43 are formed on the pivotal end of the swing arm 40. The tooth surface 42 is an incomplete gear surface. The outer diameter of the tooth surface 42 is larger than that of the circular arc light surface one 41, and the vertical surface 43 is located between the circular arc light surface one 41 and the tooth surface 42, and the circular arc light surface one 41 is located on the outer side of the tooth surface 42. An elastic layer is fixed on the vertical surface 43.

[0030] The positioning block 60 is fixed to the lower portion / middle lower portion of the U-shaped arm 31.

[0031] As shown in Figure 2 , Figure 3 In the initial state, the lower portion of the side of the positioning block 60 facing the pivotal end of the swing arm 40 is in contact with the vertical surface 43, and the upper portion is formed with a circular arc light surface two 61, and the circular arc light surface two 61 is in contact with the lower portion of the circular arc light surface one 41. During the rotation of the swing arm 40 relative to the column 21 (clockwise rotation and counterclockwise rotation), the circular arc light surface two 61 can keep in contact with the circular arc light surface one 41, and the upper side of the circular arc light surface one 41 can move towards and away from the circular arc light surface two 61. In the illustrated case, the swing arm 40 rotates counterclockwise relative to the column 21 or the assembling block 30, and the upper side of the circular arc light surface one 41 moves towards the circular arc light surface two 61, during which the movable stop rod 50 moves outwardly relative to the guardrail 20; on the contrary, after the worker's body is separated from the movable stop rod 50, the movable stop rod 50 moves inwardly relative to the guardrail 20, during which the swing arm 40 rotates clockwise relative to the column 21 or the assembling block 30, and the upper side of the circular arc light surface one 41 moves away from the circular arc light surface two 61.

[0032] The sensing assembly comprises a rack portion 70, a base 80 fixed at the root of the U-shaped arm 31, and a sensing component arranged on the base 80. The rack body of the rack portion 70 is arranged obliquely relative to the U-shaped arm 31, and is matched with the base 80 through a linear slide rail structure, and can be engaged with the tooth surface 42. During the rotating action of the swing arm 40, the tooth surface 42 can drive the rack body of the rack portion 70 to slide along the oblique direction relative to the base 80.

[0033] A transmission rod 71 matched with the sensing component is formed on the outer end side of the rack body of the rack portion 70, and a spring 72 is sleeved on the end portion of the transmission rod 71. When the tooth surface 42 drives the rack portion 70 to reciprocate slide relative to the base 80, the transmission rod 71 can be synchronously moved (along the oblique extension direction of the rack body) to make the sensing component generate a sensing signal, and to make the spring 72 be deformed in extension and contraction.

[0034] The sensing component comprises a cylinder portion 81 fixed on the base 80, and a sleeve 82 and a sensor body. The sensor body is fixed on the cylinder portion 81.

[0035] The free end of the transmission rod 71 extends obliquely outward and downward after passing through the cylinder cavity of the cylinder portion 81, and a radial flange 711 is arranged on the end portion thereof. The sleeve 82 is sleeved on the transmission rod 71, and the two ends of the spring 72 are in contact with the radial flange 711 and one end of the sleeve 82 respectively. The other end of the sleeve 82 extends to the cylinder portion 81 and is matched with the sensor body.

[0036] The sensor body is selected as a pressure sensor 811 and is fixed in the cylinder cavity of the cylinder portion 81. The other end of the sleeve 82 extends into the cylinder cavity of the cylinder portion 81, and the end face of the sleeve 82 is in contact with the pressure sensor.

[0037] During the rotating action of the swing arm 40, the tooth surface 42 can drive the rack body of the rack portion 70 to slide along the oblique direction relative to the base 80, and the transmission rod 71 is synchronously moved along the oblique direction relative to the base 80, so that the radial flange 711 arranged on the free end side of the transmission rod 71 can drive the spring 72 to be deformed in compression, and the end face of the sleeve 82 extending into the cylinder portion 81 can push the pressure sensor to generate a sensing signal. Conversely, after the external force acting on the movable stop lever 50 is removed, the energy accumulated in the compressed state of the spring 72 can reversely drive the rack portion 70 to drive the tooth surface 42 to act, so that the swing arm 40 completes the reset rotating action.

[0038] The above-mentioned embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. The present application can be improved in many aspects without departing from the general idea, and the above-mentioned embodiments can be modified or changed by those skilled in the art without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical idea disclosed by the present application should be covered by the claims of the present application.

Claims

1. A hydraulic lifting platform with a pre-warning fence, comprising a guard fence (20) fixed on a lifting platform (10); the guard fence (20) comprises upright posts (21) fixed at four corner positions of the lifting platform (10), a plurality of horizontal crossbars (22) fixedly connected between the upright posts (21) on the front side and the rear side respectively, and a plurality of vertical crossbars (23) fixedly connected between the upright posts (21) on the left side and the right side respectively; characterized in that: assembly blocks (30) are fixedly arranged at the upper ends of the two upright posts (21) on the front side and the two upright posts (21) on the rear side respectively, swing arms (40) are pivotally matched with the assembly blocks (30), and two movable blocking rods (50) are connected with the free ends of the two swing arms (40) on the front side and the two swing arms (40) on the rear side respectively at two ends. A positioning block (60) is arranged on the assembly block (30) and matched with the pivot end of the swing arm (40), so that the swing arm (40) can be kept in an upwardly inclined and extended state relative to the upright post (21) towards the inner side of the guard fence (20), and the swing arm (40) can also rotate relative to the upright post (21) towards the outer side of the guard fence (20). A sensing assembly and an alarm are arranged on the assembly block (30) in connection; the sensing assembly is matched with the pivot end of the swing arm (40), and the swing arm (40) can cause the sensing assembly to generate a sensing signal when it rotates relative to the upright post (21), so that the alarm can give an alarm. The upper part of the assembly block (30) is formed with a U-shaped arm (31), and the swing arm (40) is pivotally matched with the upper part of the U-shaped arm (31).

2. The hydraulic lift platform with a pre-warning fence according to claim 1, characterized in that: The pivot end of the swing arm (40) is formed with a first circular arc light surface (41), a tooth surface (42) and a vertical surface (43); the outer diameter of the tooth surface (42) is larger than that of the first circular arc light surface (41), the vertical surface (43) is located between the first circular arc light surface (41) and the tooth surface (42), and the first circular arc light surface (41) is located on the outer side of the tooth surface (42). The positioning block (60) is fixed on the lower part of the U-shaped arm (31); the lower part of the side of the positioning block (60) facing the pivot end of the swing arm (40) is in contact with the vertical surface (43), the upper part of the side is formed with a second circular arc light surface (61), and the second circular arc light surface (61) is in contact with the lower part of the first circular arc light surface (41); when the swing arm (40) rotates, the second circular arc light surface (61) can keep in contact with the first circular arc light surface (41) and the upper part of the first circular arc light surface (41) can move towards the second circular arc light surface (61). The sensing assembly comprises a rack part (70), a base (80) fixed at the root of the U-shaped arm (31) and a sensing component arranged on the base (80). The rack body of the rack part (70) is arranged obliquely relative to the U-shaped arm (31) and matched with the base (80) through a linear slide rail structure, and engaged with the tooth surface (42); a transmission rod (71) matched with the sensing component is formed on the outer end side of the rack body of the rack part (70), and a spring (72) is sleeved on the end of the transmission rod (71). ​ When the tooth surface (42) drives the rack portion (70) to slide, the transmission rod (71) can promote the sensing assembly to generate a sensing signal and promote the spring (72) to stretch and deform.

3. The hydraulic lift platform with a pre-warning fence according to claim 2, characterized in that: The sensing assembly comprises a cylinder portion (81) fixedly matched with the base (80), a sleeve (82) and a sensor body; the sensor body is fixed on the cylinder portion (81); the free end of the transmission rod (71) extends outward and downward after penetrating through the cylinder portion (81) and is provided with a radial flange (711); the sleeve (82) is sleeved on the transmission rod (71) and makes the two ends of the spring (72) respectively contact with the radial flange (711) and one end of the sleeve (82); the other end of the sleeve (82) extends to the cylinder portion (81) and is matched with the sensor body.

4. The hydraulic lift platform with a pre-warning fence according to claim 3, characterized in that: The sensor body is a pressure sensor (811) and the pressure sensor (811) is fixed in a cylinder cavity of the cylinder portion (81); the other end of the sleeve (82) extends into the cylinder portion (81) and the end face is in contact with the pressure sensor.

5. The hydraulic lift platform with a pre-warning fence according to claim 2, characterized in that: An elastic layer is fixed on the vertical surface (43).

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