Ejector rod type force application device and elevator overload detection device

Abstract

The utility model provides an ejector rod type force application device and an elevator overload detection device, relates to the technical field of elevators, and solves the technical problems that time and labor are wasted and the detection efficiency is low when a weight is used for measuring the rated load of an elevator. The ejector rod type force applying device comprises a lower screw, a nut piece and an upper supporting seat, the upper supporting seat abuts against the upper beam, the pressure sensor is fixed to the top of the lift car, the lower end of the lower screw abuts against the pressure sensor, and the lower portion of the upper supporting seat and at least the upper portion of the lower screw extend into an inner thread cavity of the nut piece and are both in threaded connection with the nut piece. The thread turning direction of the lower screw rod is opposite to that of the upper supporting seat; the lower screw rod and the upper supporting seat can be driven to move back to back by screwing the nut piece, so that the pressure of the lower screw rod on the pressure sensor is increased; the ejector rod type force application device replaces an original weight, pressure can be applied to the pressure sensor, the elevator overload detection device can achieve weight-free rapid measurement, the measurement efficiency is improved, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to a push rod type force applying device and an elevator overload detection device. Background Art

[0002] As a prerequisite indicator for the normal operation of elevators, elevator overload alarm has become a routine inspection item in daily elevator inspections.

[0003] At present, when measuring the overload of a conventional elevator, a weight equal to the rated load weight of the elevator is placed in the elevator car, and the weight is continued to be placed until the overload alarm device of the elevator sounds an alarm, and the overload alarm trigger weight is obtained to obtain the test result. Compare whether the overload alarm trigger weight is consistent with the rated load weight of the elevator.

[0004] The applicant has found that the prior art has at least the following technical problems: the existing measurement method requires placing a large number of weights in the elevator car, the detection process is cumbersome, time-consuming and labor-intensive, and the detection efficiency is low. Utility Model Content

[0005] The purpose of the utility model is to provide a push rod type force application device and an elevator overload detection device to solve the technical problems in the prior art that the method of using weights to measure the rated load of an elevator is time-consuming and labor-intensive, and the detection efficiency is low; the many technical effects that can be produced by the preferred technical scheme among the many technical schemes provided by the utility model are detailed as follows.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model provides a push rod type force applying device, comprising a lower screw rod, a nut member, and an upper support seat, wherein:

[0008] The upper support seat is against the upper beam, the pressure sensor is fixed on the top of the car, the lower end of the lower screw is against the pressure sensor, the lower part of the upper support seat and at least the upper part of the lower screw extend into the internal thread cavity of the nut member, and are both threadedly connected with the nut member, and the thread rotation direction of the lower screw is opposite to that of the upper support seat;

[0009] Twisting the nut member can drive the lower screw rod and the upper support seat to move in opposite directions, thereby increasing the pressure of the lower screw rod on the pressure sensor.

[0010] Preferably, the upper support seat includes an upper screw, at least the lower portion of which extends into the internal thread cavity of the nut member and is threadedly connected to the nut member; the thread rotation direction of the upper screw is opposite to that of the lower screw.

[0011] Preferably, the upper support seat also includes a top seat, which is fixedly connected to the upper screw rod and abuts against the upper beam.

[0012] Preferably, the nut member is a polygonal rod member, and the internal thread cavity of the nut member is open at both upper and lower ends.

[0013] Preferably, the top rod type force applying device also includes a fixing seat, the pressure sensor is fixed on the fixing seat, and the fixing seat is used to be fixed on the top of the car.

[0014] The utility model also provides an elevator overload detection device, comprising a control unit, a display unit and the above-mentioned push rod type force application device, wherein:

[0015] The control unit is electrically connected to the pressure sensor and the display unit, and is used to convert the signal of the pressure sensor into a digital signal and transmit it to the display unit for display.

[0016] Preferably, the number of the top rod type force applying devices is one or more than two. When the number of the top rod type force applying devices is more than two, the top rod type force applying devices are distributed on two opposite sides of the top of the car.

[0017] Preferably, the elevator overload detection device further comprises an alarm unit, the control unit is electrically connected to the alarm unit, and the control unit is used for controlling the alarm unit to alarm when the pressure of the pressure sensor exceeds a set value.

[0018] Preferably, the elevator overload detection device further comprises a shock-absorbing pad, and the shock-absorbing pad is fixed between the lower beam bracket and the bottom of the car.

[0019] Compared with the prior art, the push rod type force-applying device and elevator overload detection device provided by the utility model have the following beneficial effects: the support seat is abutted against the upper beam, the pressure sensor is fixed on the top of the car, the lower end of the lower screw is abutted against the pressure sensor, and the nut is turned, so that the lower screw and the upper support seat can move in the opposite direction, thereby increasing the pressure of the lower screw on the pressure sensor. When the pressure reaches the elevator overload setting value, the original elevator overload signal is adjusted to make it send out an overload alarm. Or during acceptance, the elevator overload detection device is used to measure whether the overload value set by the elevator installation is accurate. The push rod type force-applying device replaces the original weights and can apply pressure to the pressure sensor. The elevator overload detection device can realize rapid measurement without weights, improve measurement efficiency, and save time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the installation of an elevator overload detection device on an elevator;

[0022] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0023] Figure 3 It is a structural schematic diagram of a push rod type force applying device;

[0024] Figure 4 It is a schematic diagram of the axial cross-sectional structure of a push rod type force application device.

[0025] In the figure, 1, nut; 10, internal thread cavity; 2, lower screw; 3, upper support seat; 31, upper screw; 32, top seat; 4, fixed seat; 5, shock-absorbing pad; 100, car; 200, upper beam; 300, lower beam bracket; 400, vertical beam. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The elevator overload sensor in the prior art is used to detect the pressure in the car. When the pressure in the car reaches a set value, the pressure signal is transmitted to the elevator control system. The control system controls the alarm device to sound an alarm, thereby ensuring the safety of the elevator.

[0030] At present, when measuring the overload of a conventional elevator, a weight equal to the rated load weight of the elevator is placed in the elevator car, and the weight is continued to be placed until the elevator overload alarm device sounds an alarm, and the overload alarm trigger weight is obtained to obtain the test result. Compare whether the overload alarm trigger weight is consistent with the rated load weight of the elevator. The existing measurement method mentioned above requires placing a large number of weights in the elevator car, and the detection process is cumbersome, time-consuming, and labor-intensive, and the detection efficiency is low.

[0031] In view of the above problems, the embodiments of the utility model provide a push rod type force applying device and an elevator overload detection device, which replace the original weights, can realize rapid measurement without weights, improve measurement efficiency, and save time and labor.

[0032] Combine the following Figure 1-Figure 4 The technical solution provided by the utility model is described in more detail.

[0033] Embodiment 1:

[0034] The utility model provides a push rod type force applying device, including a lower screw rod 2, a nut member 1, and an upper support seat 3, wherein: the upper support seat 3 is against the upper beam 200 of the elevator, the pressure sensor is fixed on the top of the car 100, the lower end of the lower screw rod 2 is against the pressure sensor, the lower part of the upper support seat 3 and at least the upper part of the lower screw rod 2 extend into the internal thread cavity 10 of the nut member 1, and are both threadedly connected to the nut member 1, and the thread rotation direction of the lower screw rod 2 is opposite to that of the upper support seat 3; when the nut member 1 is turned, the lower screw rod 2 and the upper support seat 3 can move in the opposite direction or have a tendency to move in the opposite direction, thereby increasing the pressure of the lower screw rod 2 on the pressure sensor.

[0035] Among them, the above-mentioned "pressure sensor" is not an elevator overload sensor, but another sensor fixed to the top of the car 100. By twisting the nut 1, the lower screw 2 and the upper support seat 3 can move in the opposite direction, thereby increasing the pressure of the lower screw 2 on the pressure sensor. The pressure sensor can be electrically connected to an additional control unit and a display unit. The pressure sensor transmits the pressure signal to the control unit. The control unit converts the signal of the pressure sensor into a digital signal and transmits it to the display unit for display, so that the tester can understand the pressure value in real time. When the pressure reaches the elevator overload setting value, the original elevator overload signal is adjusted to send out an overload alarm. Or during acceptance, the elevator overload detection device is used to measure whether the overload value set in the elevator installation is accurate.

[0036] Of course, by screwing the nut member 1 in the reverse direction, the lower screw rod 2 and the upper support seat 3 located inside the nut member 1 can move toward each other, reducing the pressure on the pressure sensor. The purpose of this embodiment is mainly to increase the pressure on the pressure sensor.

[0037] The push rod type force applying device provided by the utility model makes the support seat abut against the upper beam 200, the pressure sensor is fixed on the top of the car 100, the lower end of the lower screw rod 2 abuts against the pressure sensor, and the nut member 1 is turned, so that the lower screw rod 2 and the upper support seat 3 can move in the opposite direction, thereby increasing the pressure of the lower screw rod 2 on the pressure sensor. When the pressure reaches the elevator overload setting value, the original elevator overload signal is adjusted to make it send out an overload alarm. Or during acceptance, the elevator overload detection device is used to measure whether the overload value set by the elevator installation is accurate. The push rod type force applying device replaces the original multiple weights, and can apply pressure to the pressure sensor without the need to carry the weights multiple times.

[0038] As an alternative embodiment, see Figure 2 , Figure 3 and Figure 4 As shown, the upper support seat 3 of this embodiment includes an upper screw rod 31, at least the lower portion of which extends into the internal thread cavity 10 of the nut member 1 and is threadedly connected to the nut member 1, and the thread rotation direction of the upper screw rod 31 is opposite to that of the lower screw rod 2.

[0039] See also Figure 2 , Figure 3 and Figure 4 As shown, the support seat is abutted against the upper beam 200, the pressure sensor is fixed to the top of the car 100, the lower end of the lower screw 2 is abutted against the pressure sensor, and the nut member 1 is turned. Since the threads of the lower screw 2 and the upper screw 31 have opposite rotation directions, the lower screw 2 and the upper screw 31 can move back to back or have a tendency to move back to back in the nut member 1. In this way, the pressure of the lower screw 2 on the pressure sensor is continuously increased, replacing the method of continuously placing weights to increase the pressure on the pressure sensor. This structure is convenient and fast.

[0040] As an alternative embodiment, see Figure 2 and Figure 3 As shown, the upper support seat 3 also includes a top seat 32 , which is fixedly connected to the upper screw rod 31 and abuts against the upper beam 200 .

[0041] The top seat 32 can increase the contact area with the upper beam 200, so that the upper support seat 3 can be more stably pressed against the upper beam 200, thereby causing the lower screw rod 2 to apply pressure to the pressure sensor.

[0042] As an alternative embodiment, see Figure 2 and Figure 3 As shown, the nut member 1 is a polygonal rod member, and the internal thread cavity 10 of the nut member 1 is open at both upper and lower ends.

[0043] The nut member 1 of the above structure is convenient for using a manual wrench or an electric wrench to twist the nut member 1, preventing the nut member 1 from slipping with the manual wrench or the electric wrench, and facilitating operation. The upper screw rod 31 and the lower screw rod 2 can be respectively extended into the nut member 1 through the upper and lower ends of the internal thread cavity 10, thereby achieving the connection between the three.

[0044] Generally, the overall height adjustment of the top rod force device is 20-30mm, and the length of the upper screw and the lower screw can be increased or shortened according to actual conditions.

[0045] As an alternative embodiment, see Figure 2 and Figure 3 As shown, the top rod type force applying device also includes a fixing seat 4, and the pressure sensor is fixed on the fixing seat 4, and the fixing seat 4 is used to be fixed on the top of the car 100. The above structure is convenient for fixing the pressure sensor, and the lower screw rod 2 can contact the pressure sensor, so that when the nut member 1 is screwed, the pressure on the pressure sensor is increased.

[0046] The push rod type force applying device of this embodiment, see Figure 1-Figure 4 As shown, for the structure in which the original pressure sensor of the elevator is installed on the top of the car, the support seat is against the upper beam 200, the pressure sensor is fixed on the top of the car 100, the lower end of the lower screw 2 is against the pressure sensor, and the nut 1 is turned. Since the threads of the lower screw 2 and the upper screw 31 are in opposite directions, the lower screw 2 and the upper screw 31 can move back to back or have a tendency to move back to back in the nut 1. In this way, the pressure of the lower screw 2 on the pressure sensor continues to increase. When the pressure reaches the elevator overload setting value, the original elevator overload signal is adjusted to send out an overload alarm. Or during acceptance, the elevator overload detection device is used to measure whether the overload value set in the elevator installation is accurate.

[0047] Embodiment 2:

[0048] This embodiment provides an elevator overload detection device, including a control unit, a display unit and the above-mentioned push rod type force application device, wherein: the control unit is electrically connected to the pressure sensor and the display unit, and is used to convert the signal of the pressure sensor into a digital signal and transmit it to the display unit for display.

[0049] The control unit can be a single chip microcomputer with a pre-stored setting program, etc. The display unit includes a display screen. The pressure sensor transmits the pressure signal to the control unit, which is used to convert the signal of the pressure sensor into a digital signal and transmit it to the display unit for display. The display unit displays the pressure signal in real time.

[0050] The elevator overload detection device can be used to adjust the original elevator overload signal to send out an overload alarm when the pressure on the pressure sensor reaches the elevator overload setting value, thereby ensuring the accuracy of the elevator overload sensor.

[0051] Or during acceptance, the elevator overload detection device is used to measure whether the overload value set in the elevator installation is accurate.

[0052] As an optional embodiment, the elevator overload detection device further includes an alarm unit, the control unit is electrically connected to the alarm unit, and the control unit is used to control the alarm unit to alarm when the pressure of the pressure sensor exceeds a set value, thereby reminding the operator. The alarm unit can be an audible and visual alarm, etc.

[0053] The elevator overload detection device can realize rapid measurement without weights, improves measurement efficiency, and saves time and effort.

[0054] As an alternative embodiment, see Figure 1 The number of the top rod type force applying devices is one or more than two. When the number of the top rod type force applying devices is more than two, the top rod type force applying devices are distributed on opposite sides of the top of the car 100. The pressure on the opposite sides of the top of the car 100 can be measured to ensure the detection accuracy.

[0055] As an alternative embodiment, see Figure 1 The elevator overload detection device also includes a shock-absorbing pad 5, which is fixed between the lower beam bracket 300 and the bottom of the car 100.

[0056] See also Figure 1 As shown, the elevator includes an upper beam 200, a vertical beam 400 and a lower beam bracket 300, and a shock-absorbing pad 5 is arranged on the lower beam bracket 300, and the shock-absorbing pad 5 supports the bottom of the car 100. The nut 1 is screwed to make the top of the car 100 and the upper beam 200 receive a supporting force to compress the shock-absorbing pad 5 of the bottom of the car. When the force reaches the elevator overload setting value, the original elevator overload signal is adjusted to send out an overload alarm. The shock-absorbing pad 5 can buffer the force on the bottom of the car 100 to ensure the safety of the elevator.

[0057] In the description of this specification, specific features, structures or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0058] 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. 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.

[0059] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A push rod type force applying device, characterized in that: It includes a lower screw rod, a nut, and an upper support seat, wherein: The upper support seat is against the upper beam, the pressure sensor is fixed on the top of the car, the lower end of the lower screw is against the pressure sensor, the lower part of the upper support seat and at least the upper part of the lower screw extend into the internal thread cavity of the nut member, and are both threadedly connected with the nut member, and the thread rotation direction of the lower screw is opposite to that of the upper support seat; Twisting the nut member can drive the lower screw rod and the upper support seat to move in opposite directions, thereby increasing the pressure of the lower screw rod on the pressure sensor.

2. The push rod type force applying device according to claim 1, characterized in that: The upper support seat includes an upper screw rod, at least the lower portion of which extends into the internal thread cavity of the nut member and is threadedly connected to the nut member; the thread rotation direction of the upper screw rod is opposite to that of the lower screw rod.

3. The push rod type force applying device according to claim 2, characterized in that: The upper support seat also includes a top seat, which is fixedly connected to the upper screw rod and abuts against the upper beam.

4. The push rod type force applying device according to claim 1, characterized in that: The nut member is a polygonal rod member, and the upper and lower ends of the internal thread cavity of the nut member are open.

5. The push rod type force applying device according to claim 1, characterized in that: The top rod type force applying device also includes a fixing seat, the pressure sensor is fixed on the fixing seat, and the fixing seat is used to be fixed on the top of the car.

6. An elevator overload detection device, characterized in that: It comprises a control unit, a display unit and a push rod type force applying device according to any one of claims 1 to 5, wherein: The control unit is electrically connected to the pressure sensor and the display unit, and is used to convert the signal of the pressure sensor into a digital signal and transmit it to the display unit for display.

7. The elevator overload detection device according to claim 6, characterized in that: The number of the top rod type force applying devices is one or more than two. When the number of the top rod type force applying devices is more than two, the top rod type force applying devices are distributed on two opposite sides of the top of the car.

8. The elevator overload detection device according to claim 6, characterized in that: The elevator overload detection device also includes an alarm unit, the control unit is electrically connected to the alarm unit, and the control unit is used to control the alarm unit to alarm when the pressure of the pressure sensor exceeds a set value.

9. The elevator overload detection device according to claim 6, characterized in that: The elevator overload detection device also includes a shock-absorbing pad, which is fixed between the lower beam bracket and the bottom of the car.

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