Movable crane suitable for small factory

Abstract

The utility model discloses a mobile crane suitable for small factories, and relates to the technical field of cranes, the mobile crane comprises a support plate, a suspender rotatably arranged on the support plate and a variable speed driving mechanism arranged on the support plate, the variable speed driving mechanism is in transmission connection with the suspender, and a lifting rope is wound on the suspender; four sets of transverse telescopic mechanisms are arranged on the supporting plate in a circumferential array mode, a vertical lifting rod is arranged at the end, away from the supporting plate, of any transverse telescopic mechanism, and universal wheels are arranged at the bottom ends of the vertical lifting rods. By controlling the extension of the four groups of transverse telescopic mechanisms, the transverse coverage space of the crane can be increased; the longitudinal coverage space of the crane can be increased by adjusting the length of the vertical lifting rod, so that the crane can adapt to lathes with different sizes; through the design of the variable-speed driving mechanism, the rotating speed of the lifting rod can be controlled, so that the crane can lift parts with different weights.

Description

Technical Field

[0001] The utility model relates to the technical field of traveling cranes, and in particular to a mobile traveling crane suitable for small factories. Background Art

[0002] The indoor space of small factories is often compact, and installing a large crane will take up most of the space. At the same time, the purchase, installation, and commissioning costs of large cranes are usually high, which is a considerable expense for small factories with limited funds. At the same time, as heavy equipment, large cranes require regular maintenance and upkeep, which also increases the burden on small factories. Therefore, it is urgent to design a mobile small crane for small factories, which is cheaper than a large crane. At the same time, when facing the space problem of small factories, small cranes can play the greatest role in limited space. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a mobile overhead crane suitable for small factories.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A mobile overhead crane suitable for small factories comprises a support plate, a suspension rod rotatably arranged on the support plate and a variable speed drive mechanism arranged on the support plate, the variable speed drive mechanism being transmission-connected to the suspension rod, and a suspension rope being wound around the suspension rod; four groups of transverse telescopic mechanisms are arranged in a circular array on the support plate, a vertical lifting rod is arranged at one end of any of the transverse telescopic mechanisms away from the support plate, and a universal wheel is arranged at the bottom end of the vertical lifting rod.

[0006] Furthermore, in the utility model, the above-mentioned speed change drive mechanism includes a motor arranged on the above-mentioned support plate, the output shaft of the above-mentioned motor is coaxially connected with the rotating shaft, the above-mentioned rotating shaft is provided with a first gear set, the above-mentioned suspension rod is provided with a second gear set, and the above-mentioned second gear set is transmission-connected with the above-mentioned first gear set.

[0007] Further, in the present utility model, the first gear set includes a first torque gear and a first high-speed gear that are spaced apart on the rotating shaft; the second gear set includes a spline shaft sleeved on the hanging rod, a second torque gear and a second high-speed gear that are both connected to the hanging rod through bearings, and a speed-changing piece that is slidably connected to the spline shaft, and the sliding direction of the speed-changing piece is parallel to the central axis of the hanging rod; the second torque gear and the first torque gear mesh with each other, and the diameter of the second torque gear is smaller than that of the first torque gear; the second high-speed gear and the first high-speed gear mesh with each other, and the diameter of the second high-speed gear is larger than that of the first high-speed gear; the spline shaft is located between the second torque gear and the second high-speed gear; the speed-changing piece can mesh with the second torque gear or mesh with the second high-speed gear.

[0008] Further, in the present utility model, pins are provided on both sides of the speed-changing piece, and slots adapted to the pins are provided on one side of the second torque gear close to the speed-changing piece and on one side of the second high-speed gear close to the speed-changing piece.

[0009] Further, in the present utility model, any of the above-mentioned horizontal telescopic mechanisms includes a telescopic rod and a hydraulic rod. One end of the telescopic rod is connected to the support plate, and the other end is connected to the top end of the vertical lifting rod; a vertical plate is provided on the support plate, one end of the hydraulic rod is hinged to the vertical plate, and the other end is hinged to the top end of the vertical lifting rod.

[0010] The beneficial effects of the present utility model are as follows:

[0011] 1. By controlling the elongation of the four groups of horizontal telescopic mechanisms, the horizontal coverage space of this gantry crane can be increased; by adjusting the length of the vertical lifting rod, the longitudinal coverage space of this gantry crane can be increased, so that this gantry crane can be adapted to lathes of different volumes.

[0012] 2. Through the design of the variable-speed drive mechanism, the rotation speed of the hanging rod can be controlled, so that this gantry crane can lift parts of different weights. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0014] Figure 2 is a schematic structural diagram of the variable-speed drive mechanism of an embodiment of the present utility model;

[0015] Figure 3 is a schematic structural diagram of the speed-changing piece of an embodiment of the present utility model.

[0016] In the figure: 101 - support plate; 201 - suspension rod; 301 - variable speed drive mechanism; 3011 - motor; 3012 - rotating shaft; 3013 - first torque gear; 3014 - first high-speed gear; 3015 - spline shaft; 3016 - second torque gear; 3017 - second high-speed gear; 3018 - variable speed plate; 3019 - pin; 401 - lifting rope; 501 - horizontal telescopic mechanism; 5011 - telescopic rod; 5012 - hydraulic rod; 601 - vertical lifting rod; 701 - universal wheel. Detailed implementation manners

[0017] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present utility model.

[0018] Please refer to Figures 1-3 , the present utility model provides a technical solution:

[0019] A mobile crane applicable to a small factory includes a support plate 101, a suspension rod 201 rotatably installed on the support plate 101, and a variable speed drive mechanism 301 installed on the support plate 101. The variable speed drive mechanism 301 is in transmission connection with the suspension rod 201. A lifting rope 401 is wound around the suspension rod 201, and one end of the lifting rope 401 is connected with a hook; Four groups of horizontal telescopic mechanisms 501 are circumferentially and arrayedly installed on the support plate 101. A vertical lifting rod 601 is installed at one end of any horizontal telescopic mechanism 501 away from the support plate 101, and a universal wheel 701 is installed at the bottom end of the vertical lifting rod 601. By controlling the elongation of the four groups of horizontal telescopic mechanisms 501, the horizontal coverage space of this crane can be increased; By adjusting the length of the vertical lifting rod 601, the longitudinal coverage space of this crane can be increased, so that this crane can be adapted to lathes of different volumes. In this embodiment, the vertical lifting rod 601 can use a hydraulic lifting rod.

[0020] In this embodiment, the variable speed drive mechanism 301 includes a motor 3011 mounted on the support plate 101. The output shaft of the motor 3011 is coaxially connected to a rotating shaft 3012. A first gear set is mounted on the rotating shaft 3012, and a second gear set is mounted on the suspension rod 201. The second gear set and the first gear set are in transmission connection. Specifically, the first gear set includes a first torque gear 3013 and a first high-speed gear 3014 that are spaced apart and mounted on the rotating shaft 3012; the second gear set includes a spline shaft 3015 sleeved on the suspension rod 201, a second torque gear 3016 and a second high-speed gear 3017 that are both connected to the suspension rod 201 by bearings, and a variable speed piece 3018 that is slidably connected to the spline shaft 3015. The sliding direction of the variable speed piece 3018 is parallel to the central axis of the suspension rod 201. The second torque gear 3016 and the first torque gear 3013 mesh with each other, and the diameter of the second torque gear 3016 is smaller than that of the first torque gear 3013. At the same time, the number of teeth of the second torque gear 3016 is less than that of the first torque gear 3013; the second high-speed gear 3017 and the first high-speed gear 3014 mesh with each other, and the diameter of the second high-speed gear 3017 is larger than that of the first high-speed gear 3014. At the same time, the number of teeth of the second high-speed gear 3017 is more than that of the first high-speed gear 3014; the spline shaft 3015 is located between the second torque gear 3016 and the second high-speed gear 3017; the variable speed piece 3018 can mesh with the second torque gear 3016 or mesh with the second high-speed gear 3017. In this embodiment, the spline shaft 3015 is fixedly connected to the suspension rod 201, and the cross section of the spline shaft 3015 is a regular hexagon. Therefore, the through hole on the variable speed piece 3018 should also be a regular hexagon hole.

[0021] In order to facilitate the meshing of the variable speed piece 3018 with the second torque gear 3016 or with the second high-speed gear 3017, in this embodiment, pins 3019 are installed on both sides of the variable speed piece 3018, and slots adapted to the pins 3019 are installed on the side of the second torque gear 3016 close to the variable speed piece 3018 and on the side of the second high-speed gear 3017 close to the variable speed piece 3018. From Figure 2 the perspective of, in order to facilitate the control of the left and right movement of the variable speed piece 3018 on the spline shaft 3015, a dial is installed on the variable speed piece 3018. Before use, the dial can be toggled according to the situation to make the variable speed piece 3018 mesh with the second torque gear 3016 or mesh with the second high-speed gear 3017. After adjustment, the overhead crane is then moved above the machine tool for lifting operations. In other embodiments of this embodiment, the action of toggling the dial to control the left and right movement of the variable speed piece 3018 on the spline shaft 3015 can also be controlled by an automatic reciprocating movement mechanism for the dial. For example, a lead screw nut mechanism can be used, and the nut of the lead screw nut mechanism is connected to the dial.

[0022] From Figure 2From the perspective of , when the pin 3019 on the left side of the speed change piece 3018 is inserted into the slot on the second torque gear 3016, the transmission route at this time is: motor 3011 → first torque gear 3013 → second torque gear 3016 → speed change piece 3018 → spline shaft 3015 → suspension rod 201; when the pin 3019 on the right side of the speed change piece 3018 is inserted into the slot on the second high-speed gear 3017, the transmission route at this time is: motor 3011 → first high-speed gear 3014 → second high-speed gear 3017 → speed change piece 3018 → spline shaft 3015 → suspension rod 201.

[0023] Referring to Figure 1 , in this embodiment, any horizontal telescopic mechanism 501 includes a telescopic rod 5011 and a hydraulic rod 5012. One end of the telescopic rod 5011 is connected to the support plate 101, and the other end is connected to the top end of the vertical lifting rod 601; a vertical plate is installed on the support plate 101. One end of the hydraulic rod 5012 is hinged to the vertical plate, and the other end is hinged to the top end of the vertical lifting rod 601. The telescopic rod 5011 is structurally designed to be composed of two support bars connected by sliding. The two support bars are slidably connected through a dovetail structure.

[0024] Working principle:

[0025] When it is necessary to make the suspension rod 201 rotate slowly (heavier parts can be lifted during slow operation), the speed change piece 3018 is engaged with the second high-speed gear 3017. At this time, the rotation speed of the suspension rod 201 is relatively slow. Because the first high-speed gear 3014 has to rotate multiple circles for the second high-speed gear 3017 to rotate one circle, and at this time the suspension rod 201 rotates synchronously with the second high-speed gear 3017 under the action of the speed change piece 3018, so the suspension rod 201 rotates one circle when the first high-speed gear 3014 rotates multiple circles.

[0026] When it is necessary to make the suspension rod 201 rotate at high speed, the speed change piece 3018 is engaged with the second torque gear 3016. At this time, the rotation speed of the suspension rod 201 is relatively fast. Because when the first torque gear 3013 rotates one circle, the second torque gear 3016 will rotate multiple circles, and at this time the suspension rod 201 rotates synchronously with the second torque gear 3016 under the action of the speed change piece 3018, so the suspension rod 201 will rotate multiple circles synchronously when the first torque gear 3013 rotates one circle.

[0027] After the position of the speed change piece 3018 is adjusted, according to the volume of the current machine tool, the telescopic amount of the hydraulic rod 5012 and the telescopic amount of the vertical lifting rod 601 are adjusted respectively. After adjustment, the overhead crane is moved to the machine tool for hoisting operations.

[0028] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in the relevant field. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A mobile crane suitable for small factories, characterized by: The invention comprises a support plate (101), a suspension rod (201) rotatably arranged on the support plate (101), and a variable speed drive mechanism (301) arranged on the support plate (101), wherein the variable speed drive mechanism (301) is transmission-connected to the suspension rod (201), and a suspension rope (401) is wound around the suspension rod (201); four groups of transverse telescopic mechanisms (501) are arranged in a circular array on the support plate (101), a vertical lifting rod (601) is arranged at one end of any transverse telescopic mechanism (501) away from the support plate (101), and a universal wheel (701) is arranged at the bottom end of the vertical lifting rod (601).

2. A mobile overhead crane suitable for small factories according to claim 1, characterized in that: The variable speed drive mechanism (301) comprises a motor (3011) arranged on the support plate (101), the output shaft of the motor (3011) being coaxially connected to a rotating shaft (3012), a first gear set being arranged on the rotating shaft (3012), a second gear set being arranged on the suspension rod (201), and the second gear set being in transmission connection with the first gear set.

3. A mobile overhead crane suitable for small factories according to claim 2, characterized in that: The first gear set comprises a first torque gear (3013) and a first high-speed gear (3014) which are arranged at intervals on the rotating shaft (3012); the second gear set comprises a spline shaft (3015) sleeved on the suspension rod (201), a second torque gear (3016) and a second high-speed gear (3017) which are both connected to a bearing of the suspension rod (201), and a shift plate (3018) which is slidably connected to the spline shaft (3015), wherein the sliding direction of the shift plate (3018) is parallel to the central axis of the suspension rod (201); the second torque gear (3016) and the first torque gear ( The second torque gear (3013) is meshed with each other, and the diameter of the second torque gear (3016) is smaller than the diameter of the first torque gear (3013); the second high-speed gear (3017) and the first high-speed gear (3014) are meshed with each other, and the diameter of the second high-speed gear (3017) is larger than the diameter of the first high-speed gear (3014); the spline shaft (3015) is located between the second torque gear (3016) and the second high-speed gear (3017); the speed change plate (3018) can be meshed with the second torque gear (3016) or with the second high-speed gear (3017).

4. A mobile overhead crane suitable for small factories according to claim 3, characterized in that: Latch pins (3019) are provided on both sides of the speed change plate (3018), and slots adapted to the latch pins (3019) are provided on a side of the second torque gear (3016) close to the speed change plate (3018) and a side of the second high-speed gear (3017) close to the speed change plate (3018).

5. The mobile overhead crane suitable for small factories according to claim 1, characterized in that: Any of the lateral telescopic mechanisms (501) comprises a telescopic rod (5011) and a hydraulic rod (5012); one end of the telescopic rod (5011) is connected to the support plate (101), and the other end is connected to the top end of the vertical lifting rod (601); a vertical plate is provided on the support plate (101); one end of the hydraulic rod (5012) is hinged to the vertical plate, and the other end is hinged to the top end of the vertical lifting rod (601).

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