A gantry crane with a movable range

Abstract

The present invention relates to the technical field of gantry cranes, and in particular to a gantry-type movable crane. The present invention provides a gantry-type movable crane with higher safety. A gantry-type movable crane comprises a bracket, a first slide rail, a second slide rail, a slider, a first motor, a winding wheel, a first transmission assembly and a hook pull rope, etc.; the upper parts of the two brackets are connected to the first slide rail, the second slide rail is slidably connected between the two first slide rails, the slider is slidably connected to the inner side of the second slide rail, the first motor is installed on the slider, the winding wheel is rotatably connected to the left side of the slider, the first transmission assembly is connected between the winding wheel and the output shaft of the first motor, and the winding wheel is wound with a hook pull rope. The present invention allows people to push the second slide rail forward and backward, so that the hook pull rope moves forward and backward, and then people can hang materials on the hook pull rope, and then people can move the second slide rail forward and backward again, thereby achieving the effect of convenient forward and backward movement.

Description

Technical Field

[0001] The present invention relates to the technical field of gantry cranes, and in particular to a gantry crane with a movable range. Background Art

[0002] Gantry cranes are mainly used for loading and unloading operations outdoors. Existing gantry cranes load and unload materials by moving the lifting ropes. However, the existing gantry cranes can only simply move the lifting ropes left and right when in use. When moving the lifting ropes back and forth, the entire crane needs to move, which makes the safety lower. Therefore, it is necessary to design a gantry crane.

[0003] The patent application number CN212712405U discloses a gantry crane, which includes a load-bearing seat, two groups of which are provided with movable crawlers at the bottom of the two groups of load-bearing seats, and a lifting assembly is installed above the load-bearing seat; the lifting assembly includes a support rod, a transverse connecting rod, a locking and lifting assembly, a telescopic column, and a reinforcement rod. The upper end of the telescopic column is connected to the support rod, the upper part of the support rod is connected to the transverse connecting rod, and reinforcement rods are provided on both sides of the telescopic column; the lifting assembly includes a support rod, a transverse connecting rod, a locking and lifting assembly, a telescopic column, and a reinforcement rod. The upper end of the telescopic column is connected to the support rod. The crane is adjusted according to the material when in use, but the crane can lift materials by moving left and right when in use. When it needs to move forward and backward, the entire gantry crane needs to move, which makes it easy for the material to shake during the forward and backward movement, and the safety is low.

[0004] We have designed a gantry crane with a higher safety level and a movable range to overcome the low safety of existing gantry cranes when moving forward and backward. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention provides a gantry crane with a higher safety and a movable range, so as to overcome the disadvantage of the existing gantry crane having lower safety when moving forward and backward.

[0006] To achieve the above objectives, the present invention is implemented through the following scheme: a gantry crane with a movable range, comprising:

[0007] A bracket and a first slide rail, wherein the upper portions of the two brackets are connected to the first slide rail;

[0008] A second slide rail is slidably connected between the two first slide rails;

[0009] A slider is slidably connected to the inner side of the second slide rail;

[0010] A first motor is mounted on the slider;

[0011] The winding wheel is rotatably connected to the left side of the slider;

[0012] a first transmission assembly, wherein the first transmission assembly is connected between the winding wheel and the output shaft of the first motor;

[0013] A hooked pull rope, with a hooked pull rope wound on the reel;

[0014] A moving mechanism is provided on the lower side of the bracket, and the moving mechanism is used to drive the bracket to move;

[0015] An adjusting mechanism is provided between the slider and the second slide rail, and the adjusting mechanism is used to drive the slider to move.

[0016] As an improvement to the above solution, the moving mechanism includes:

[0017] Second motor: four second motors are evenly installed on the lower side of the bracket;

[0018] The first rotating shaft and the output shaft of the second motor are both connected to the first rotating shaft;

[0019] The second rotating shaft is evenly and rotatably connected to the lower side of the bracket with four groups of second rotating shafts, with three second rotating shafts forming a group;

[0020] A second transmission assembly is connected between the first rotating shaft and the second rotating shaft;

[0021] The roller is connected to the second rotating shaft.

[0022] As an improvement to the above solution, the regulating mechanism includes:

[0023] a first fixing rod, the left side of the second slide rail being connected to the first fixing rod;

[0024] A fixed block is connected to the right side of the upper portion of the second slide rail;

[0025] A double screw rod is rotatably connected between the fixed block and the upper side of the first fixed rod to drive the slider to move, and the slider is threadedly connected to the double screw rod;

[0026] A first rotating handle is rotatably connected to the lower side of the first fixing rod;

[0027] A third transmission assembly is connected between the first rotating handle and the double screw rod.

[0028] As an improvement to the above solution, a lubrication mechanism for applying lubricating oil to the roller is also included, and the lubrication mechanism includes:

[0029] Charging barrel: Four charging barrels for containing lubricating oil are evenly connected to the lower side of the bracket;

[0030] The piston rod is slidably connected to the rear side of the charging barrel;

[0031] One-way valve: a one-way valve is connected to the front side of the upper part of the charging barrel;

[0032] Sprinkler head: four sprinkler heads are evenly connected to the lower part of the bracket;

[0033] The front of the charging barrel is connected with a conduit, and the conduit passes through the bracket and is connected with the spray head.

[0034] As an improvement to the above solution, a pulling mechanism for driving the second slide rail to move is further included, and the pulling mechanism includes:

[0035] A first spring is connected between the left side of the rear portion of the second slide rail and the first slide rail on the left side, and a first spring is connected between the right side of the rear portion of the second slide rail and the first slide rail on the right side;

[0036] Iron wire pull ropes, with iron wire pull ropes connected to the left and right sides of the front of the second slide rail;

[0037] Guide wheels, the front portions of the two first slide rails are rotatably connected to guide wheels;

[0038] A second rotating handle is rotatably connected to the lower side of the front of the two brackets;

[0039] The wire take-up device is connected to the rear side of the two second rotating handles. The wire rope on the left side passes through the second slide rail on the left and bypasses the guide wheel on the left to connect with the wire take-up device on the left. The wire rope on the right side passes through the second slide rail on the right and bypasses the guide wheel on the right to connect with the wire take-up device on the right.

[0040] As an improvement to the above solution, a compression mechanism for automatically applying lubricating oil is also included, and the compression mechanism includes:

[0041] The gear rod and the rear part of the piston rod are connected with a gear rod;

[0042] A second spring is connected between the gear rod and the charging barrel. The gear rod is located behind the charging barrel, and the second spring is wound around the rear side of the piston rod.

[0043] There is a missing gear, and the left side of the second rotating shaft in the middle of each group is connected with a missing gear, and the missing gear is engaged with the gear rod.

[0044] As an improvement to the above solution, a locking mechanism for locking the roller is further included, and the locking mechanism includes:

[0045] Second fixing rods: four groups of second fixing rods are evenly connected to the lower side of the bracket, with four second fixing rods forming a group;

[0046] The rotating block and the second fixed rod are both rotatably connected with the rotating block;

[0047] The pressure rod is slidably connected to the rotating block;

[0048] The limiting rod and the upper part of the second fixing rod are both connected to the limiting rod;

[0049] The third spring is connected between the pressure rod and the rotating block. The pressure rod passes through the rotating block, and the third spring is wound around the pressure rod.

[0050] As an improvement to the above solution, rubber blocks are connected to the inner sides of the pressure rods.

[0051] The advantages of the present invention are as follows: 1. In the present invention, people push the second slide rail forward and backward to move the hook rope forward and backward, and then people can hang materials on the hook rope. Then people can move the second slide rail forward and backward again, thereby achieving the effect of moving materials forward and backward, avoiding shaking of materials and having higher safety;

[0052] 2. The rotation of the second shaft drives the missing gear to rotate. When the missing gear rotates and engages with the gear rod, the missing gear drives the gear rod to move forward, thereby causing the piston rod to move forward and push the lubricating oil into the spray head, thereby achieving the effect of automatic lubrication and saving manpower;

[0053] 3. People move the pressure rod outward to compress the third spring. Then people manually rotate the pressure rod to rotate the rotating block. Then people release the pressure rod, so that the third spring returns and drives the pressure rod to move inward to contact the roller, thereby achieving the jamming effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0055] Figure 2 It is a schematic diagram of the three-dimensional structure of the first part of the present invention.

[0056] Figure 3 This is a schematic diagram of the second stand-alone structure of the present invention.

[0057] Figure 4 It is a schematic diagram of the three-dimensional structure of the moving mechanism of the present invention.

[0058] Figure 5 It is a schematic cross-sectional three-dimensional structural diagram of the moving mechanism of the present invention.

[0059] Figure 6 It is a schematic diagram of the three-dimensional structure of the adjustment mechanism of the present invention.

[0060] Figure 7 It is a partial three-dimensional structural schematic diagram of the adjustment mechanism of the present invention.

[0061] Figure 8It is a schematic diagram of the three-dimensional structure of the lubrication mechanism of the present invention.

[0062] Figure 9 It is a partial three-dimensional structural schematic diagram of the lubrication mechanism of the present invention.

[0063] Figure 10 It is a partially cutaway three-dimensional structural diagram of the lubrication mechanism of the present invention.

[0064] Figure 11 It is a schematic diagram of the three-dimensional structure of the pulling mechanism of the present invention.

[0065] Figure 12 It is a schematic cross-sectional three-dimensional structural diagram of the pull-out mechanism of the present invention.

[0066] Figure 13 It is a schematic diagram of the three-dimensional structure of the compression mechanism of the present invention.

[0067] Figure 14 It is a partial three-dimensional structural diagram of the compression mechanism of the present invention.

[0068] Figure 15 It is a schematic diagram of the three-dimensional structure of the locking mechanism of the present invention.

[0069] Figure 16 It is a partial three-dimensional structural diagram of the locking mechanism of the present invention.

[0070] Figure 17 It is a partially cutaway three-dimensional structural diagram of the locking mechanism of the present invention.

[0071] Parts names and serial numbers in the figure: 1_bracket, 2_first slide rail, 3_second slide rail, 4_slider, 5_first motor, 6_first transmission assembly, 7_winding wheel, 8_hook rope, 9_moving mechanism, 91_second motor, 92_first rotating shaft, 93_second transmission assembly, 94_second rotating shaft, 95_roller, 10_adjusting mechanism, 101_fixed block, 102_double screw rod, 103_first fixed rod, 104_third transmission assembly, 105_first rotating handle, 11_lubricating mechanism , 111_charging barrel, 112_piston rod, 113_conduit, 114_one-way valve, 115_spray head, 12_pull-out mechanism, 121_wire rope, 122_guide wheel, 123_wire take-up, 124_second rotating handle, 125_first spring, 13_compression mechanism, 131_missing gear, 132_gear rod, 133_second spring, 14_locking mechanism, 141_second fixed rod, 142_pressure rod, 143_rotating block, 144_third spring, 145_limit rod. DETAILED DESCRIPTION

[0072] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0073] Example 1

[0074] A gantry crane with a movable range, now for reference Figure 1-Figure 3 , including a bracket 1, a first slide rail 2, a second slide rail 3, a slider 4, a first motor 5, a first transmission assembly 6, a winding wheel 7, a hook rope 8, a moving mechanism 9 and an adjusting mechanism 10. There are two brackets 1. The upper parts of the two brackets 1 are connected to the first slide rail 2. The second slide rail 3 is slidably connected between the two first slide rails 2. The slider 4 is slidably connected to the inner side of the second slide rail 3. The first motor 5 is fixed to the slider 4 by bolts. The winding wheel 7 is rotatably connected to the left side of the slider 4. The first transmission assembly 6 is connected between the winding wheel 7 and the output shaft of the first motor 5. The first transmission assembly 6 consists of a pulley and a belt. The winding wheel 7 and the output shaft of the first motor 5 are both connected to pulleys. Belts are wound around the two pulleys. A hook rope 8 is wound around the winding wheel 7. A moving mechanism 9 is provided on the lower side of the bracket 1, and an adjusting mechanism 10 is provided between the slider 4 and the second slide rail 3.

[0075] Reference Figure 1 、 Figure 3 、 Figure 4 and Figure 5 The moving mechanism 9 includes a second motor 91, a first rotating shaft 92, a second transmission assembly 93, a second rotating shaft 94 and a roller 95. Four second motors 91 are evenly fixed to the lower side of the bracket 1 by bolts. The second motor 91 has eight. The output shaft of the second motor 91 is connected to the first rotating shaft 92 through a coupling. The first rotating shaft 92 has eight. Four groups of second rotating shafts 94 are evenly rotatably connected to the lower side of the bracket 1, each three second rotating shafts 94 form a group, and there are twenty-four second rotating shafts 94. A second transmission assembly 93 is connected between the first rotating shaft 92 and the second rotating shaft 94. The second rotating shaft 94 is located directly below the first rotating shaft 92. There are eight second transmission assemblies 93. The second transmission assembly 93 consists of a pulley and a belt. The first rotating shaft 92 and the second rotating shaft 94 are both connected with pulleys, and a belt is wound around the two pulleys. The second rotating shaft 94 is connected to a roller 95, and there are twenty-four rollers 95.

[0076] Reference Figure 1 、 Figure 6 and Figure 7The adjusting mechanism 10 includes a fixed block 101, a double screw rod 102, a first fixed rod 103, a third transmission assembly 104 and a first rotating handle 105. The first fixed rod 103 is welded to the left side of the second slide rail 3, and the fixed block 101 is welded to the right side of the upper part of the second slide rail 3. The double screw rod 102 is rotatably connected between the fixed block 101 and the upper side of the first fixed rod 103. The slider 4 is threadedly connected to the double screw rod 102. The lower side of the first fixed rod 103 is rotatably connected to the first rotating handle 105. The third transmission assembly 104 is connected between the first rotating handle 105 and the double screw rod 102. The third transmission assembly 104 consists of a pulley and a belt. The first rotating handle 105 and the double screw rod 102 are both connected to pulleys, and belts are wound around the two pulleys.

[0077] When people need to use a gantry crane, they can use this gantry crane with a movable range. When people need to move the position of the bracket 1, they can start the second motor 91, so that the output shaft of the second motor 91 rotates to drive the first rotating shaft 92 to rotate, thereby rotating the second transmission assembly 93 and the second rotating shaft 94, so that the roller 95 rotates, and then the bracket 1 moves. When the bracket 1 moves to a suitable position, people can turn off the second motor 91. When people need to move the second slide rail 3, people can push the second slide rail 3. When the second slide rail 3 moves to a suitable position, people can hang the material on the hook rope 8, and then people can start the first motor 5. The output shaft of the first motor 5 rotates to drive the first transmission assembly 6 to rotate, thereby rotating the winding wheel 7. The hook rope 8 is wound up, and the material moves upward. When the material moves upward to the appropriate position, people can manually rotate the first rotating handle 105, so that the third transmission component 104 and the double screw rod 102 rotate, so that the slider 4 moves, and then the hook rope 8 and the material move. When the material moves to the appropriate position, people stop rotating the first rotating handle 105, and then people start the first motor 5 again. The output shaft of the first motor 5 rotates in the opposite direction to drive the first transmission component 6 to rotate in the opposite direction, so that the winding wheel 7 rotates in the opposite direction, so that the winding wheel 7 releases the hook rope 8, so that the material moves downward. When the material moves downward to the appropriate position, people can turn off the first motor 5, and then people remove the material from the hook rope 8, thereby achieving the effect of transporting materials.

[0078] Example 2

[0079] Based on Example 1, Figure 1 、 Figure 3 、 Figure 8 、 Figure 9 and Figure 10, also includes a lubrication mechanism 11, the lubrication mechanism 11 includes a charging barrel 111, a piston rod 112, a conduit 113, a one-way valve 114 and a spray head 115, four charging barrels 111 are evenly connected to the lower side of the bracket 1, there are eight charging barrels 111, the rear sides of the charging barrels 111 are slidably connected with piston rods 112, there are eight piston rods 112, the front sides of the upper parts of the charging barrels 111 are connected to one-way valves 114, four spray heads 115 are evenly welded on the lower part of the bracket 1, there are eight spray heads 115, the front parts of the charging barrels 111 are connected with conduits 113, there are eight conduits 113, the conduits 113 pass through the bracket 1 and are connected with the spray heads 115, and the spray heads 115 are located directly below the conduits 113.

[0080] Reference Figure 1 、 Figure 11 and Figure 12 , also includes a pulling-out mechanism 12, the pulling-out mechanism 12 includes an iron wire rope 121, a guide wheel 122, a wire take-up device 123, a second rotating handle 124 and a first spring 125, a first spring 125 is connected between the left side of the rear of the second slide rail 3 and the first slide rail 2 on the left, and a first spring 125 is connected between the right side of the rear of the second slide rail 3 and the first slide rail 2 on the right. There are two first springs 125, and the left and right sides of the front of the second slide rail 3 are connected to the iron wire rope 121, two first springs 125. The front of each slide rail 2 is rotatably connected to a guide wheel 122, the front lower sides of the two brackets 1 are rotatably connected to a second rotating handle 124, the rear sides of the two second rotating handles 124 are connected to a wire take-up device 123, the left iron wire pull rope 121 passes through the second slide rail 3 on the left and bypasses the guide wheel 122 on the left to connect to the wire take-up device 123 on the left, the right iron wire pull rope 121 passes through the second slide rail 3 on the right and bypasses the guide wheel 122 on the right to connect to the wire take-up device 123 on the right.

[0081] Reference Figure 3 、 Figure 13 and Figure 14 , also includes a compression mechanism 13, the compression mechanism 13 includes a missing gear 131, a gear rod 132 and a second spring 133, a gear rod 132 is welded to the rear of the piston rod 112, there are eight gear rods 132, and a second spring 133 is connected between the gear rod 132 and the charging barrel 111. The gear rod 132 is located behind the charging barrel 111, and the second spring 133 is wrapped around the rear side of the piston rod 112. There are eight second springs 133, and the left side of the second rotating shaft 94 in the middle of each group is connected to a missing gear 131, which is engaged with the gear rod 132. The missing gear 131 is located directly below the gear rod 132, and there are eight missing gears 131.

[0082] Reference Figure 3 、 Figure 15 、 Figure 16 and Figure 17, also includes a locking mechanism 14, the locking mechanism 14 includes a second fixed rod 141, a pressure rod 142, a rotating block 143, a third spring 144 and a limiting rod 145, the lower side of the bracket 1 is evenly welded with four groups of second fixed rods 141, each four second fixed rods 141 is a group, there are thirty-two second fixed rods 141, the second fixed rods 141 are rotatably connected to the rotating block 143, there are thirty-two rotating blocks 143, the rotating blocks 143 are slidably connected to the pressure rod 142, the pressure rod 1 There are thirty-two of them. The inner side of the pressure rod 142 is connected to a rubber block. There are thirty-two of them. The upper part of the second fixed rod 141 is connected to a limiting rod 145. There are thirty-two of them. The limiting rod 145 is in contact with the pressure rod 142. The pressure rod 142 is located directly below the limiting rod 145. A third spring 144 is connected between the pressure rod 142 and the rotating block 143. The pressure rod 142 passes through the rotating block 143. The third spring 144 is wound around the pressure rod 142. There are thirty-two of them.

[0083] First, people inject an appropriate amount of lubricating oil into the charging barrel 111 through the one-way valve 114. When people need to lubricate the roller 95, people can manually move the piston rod 112 forward, so that the lubricating oil in the charging barrel 111 flows into the spray head 115 through the conduit 113, and then the spray head 115 sprays the lubricating oil on the roller 95, thereby achieving the lubrication effect and extending the service life of the roller 95. When the lubricating oil in the charging barrel 111 is used up, people can manually move the piston rod 112 backward to a suitable position, and then people inject the lubricating oil into the charging barrel 111 according to the above steps.

[0084] When people need to move the position of the second slide rail 3, people can manually rotate the second rotating handle 124, so that the wire take-up 123 rotates to wind up the wire rope 121, so that the wire rope 121 is wound and pulls the second slide rail 3 forward, and then the guide wheel 122 rotates, and the first spring 125 is stretched. When the second slide rail 3 moves forward to the appropriate position, people can stop rotating the second rotating handle 124. When people need the second slide rail 3 to move backward, people can rotate the second rotating handle 124 in the opposite direction, so that the wire take-up 123 rotates in the opposite direction to release the wire rope 121, so that the first spring 125 resets and drives the second slide rail 3 to move backward, and then the guide wheel 122 rotates in the opposite direction.

[0085] The second rotating shaft 94 rotates to drive the missing gear 131 to rotate. When the missing gear 131 rotates and engages with the gear rod 132, the missing gear 131 drives the gear rod 132 to move forward, thereby compressing the second spring 133 and causing the piston rod 112 to move forward. When the missing gear 131 rotates and does not engage with the gear rod 132, the second spring 133 resets and drives the gear rod 132 to move backward, causing the piston rod 112 to move backward, thereby achieving the effect of automatic lubrication.

[0086] In the initial state, the third spring 144 is compressed. When people need to jam the roller 95, they can manually move the pressure rod 142 outward, so that the rubber block moves outward, and the third spring 144 continues to be compressed. Then people can rotate the pressure rod 142, so that the rubber block and the rotating block 143 rotate. When the rubber block on the pressure rod 142 rotates to a suitable position, people can release the pressure rod 142, so that the third spring 144 resets and drives the pressure rod 142 to move inward, so that the rubber block moves inward and contacts the roller 95, thereby achieving the jamming. When people do not need to clamp the roller 95, they can manually move the pressure rod 142 outward, so that the rubber block moves outward and the third spring 144 is compressed. Then, people can rotate the pressure rod 142 in the opposite direction, so that the rubber block and the rotating block 143 rotate in the opposite directions. When the rubber block rotates in the opposite direction to a suitable position, people can release the pressure rod 142, so that the third spring 144 drives the pressure rod 142 to move inward, thereby moving the rubber block inward. Then, the limiting rod 145 clamps the pressure rod 142, and the third spring 144 is still in a compressed state.

[0087] Those skilled in the art can make various other corresponding changes and deformations based on the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the claims of the present invention.

Claims

1. A gantry crane with a movable range, characterized in that: Includes: A bracket (1) and a first slide rail (2), wherein the upper portions of the two brackets (1) are both connected to the first slide rail (2); A second slide rail (3), wherein the two first slide rails (2) are slidably connected to each other with a second slide rail (3); A slider (4), the inner side of the second slide rail (3) is slidably connected to the slider (4); A first motor (5), the slider (4) being equipped with the first motor (5); A winding wheel (7), the left side of the slider (4) is rotatably connected to the winding wheel (7); A first transmission assembly (6) is connected between the winding wheel (7) and the output shaft of the first motor (5); A hooked pull rope (8), the hooked pull rope (8) is wound around the winding wheel (7); A moving mechanism (9) is provided on the lower side of the bracket (1), and the moving mechanism (9) is used to drive the bracket (1) to move; An adjusting mechanism (10) is provided between the slider (4) and the second slide rail (3), and the adjusting mechanism (10) is used to drive the slider (4) to move; The moving mechanism (9) includes: Second motors (91), four second motors (91) are evenly mounted on the lower side of the bracket (1); The first rotating shaft (92) and the output shaft of the second motor (91) are both connected to the first rotating shaft (92); Second rotating shafts (94), four sets of second rotating shafts (94) are evenly rotatably connected to the lower side of the bracket (1); A second transmission assembly (93), wherein the first rotating shaft (92) and the second rotating shaft (94) are both connected with the second transmission assembly (93); The roller (95) is connected to the second rotating shaft (94); The regulating mechanism (10) comprises: A first fixing rod (103), the left side of the second slide rail (3) is connected to the first fixing rod (103); A fixed block (101), the upper right side of the second slide rail (3) is connected to the fixed block (101); A double screw rod (102) is rotatably connected between the fixed block (101) and the upper side of the first fixed rod (103) to drive the slider (4) to move, and the slider (4) is threadedly connected to the double screw rod (102); A first rotating handle (105), the lower side of the first fixed rod (103) being rotatably connected to the first rotating handle (105); A third transmission assembly (104) is connected between the first rotating handle (105) and the double screw rod (102).

2. A gantry crane with a movable range according to claim 1, characterized in that: The apparatus further comprises a lubricating mechanism (11) for applying lubricating oil to the roller (95), wherein the lubricating mechanism (11) comprises: Charging barrel (111), four charging barrels (111) for containing lubricating oil are evenly connected to the lower side of the bracket (1); The piston rod (112) is slidably connected to the rear side of the charging barrel (111); A one-way valve (114), the upper front side of the charging barrel (111) is connected to a one-way valve (114); Spraying head (115), four spraying heads (115) are evenly connected to the lower part of the bracket (1); The conduit (113) is connected to the front of the charging barrel (111), and the conduit (113) passes through the bracket (1) and is connected to the spray head (115).

3. A gantry crane with a movable range according to claim 2, characterized in that: It also includes a pulling mechanism (12) for driving the second slide rail (3) to move, and the pulling mechanism (12) includes: A first spring (125), a first spring (125) is connected between the left side of the rear portion of the second slide rail (3) and the first slide rail (2) on the left side, and a first spring (125) is connected between the right side of the rear portion of the second slide rail (3) and the first slide rail (2) on the right side; Iron wire pull rope (121), the left and right sides of the front of the second slide rail (3) are connected with the iron wire pull rope (121); Guide wheels (122), the front portions of the two first slide rails (2) are both rotatably connected to guide wheels (122); A second rotating handle (124), the lower sides of the front portions of the two brackets (1) are both rotatably connected to the second rotating handle (124); A wire take-up device (123) is connected to the rear sides of the two second rotating handles (124). The left iron wire rope (121) passes through the left second slide rail (3) and bypasses the left guide wheel (122) to be connected to the left wire take-up device (123). The right iron wire rope (121) passes through the right second slide rail (3) and bypasses the right guide wheel (122) to be connected to the right wire take-up device (123).

4. A gantry crane with a movable range according to claim 3, characterized in that: It also includes a compression mechanism (13) for automatically applying lubricating oil, and the compression mechanism (13) includes: A gear rod (132), the rear portion of the piston rod (112) is connected to a gear rod (132); A second spring (133) is connected between the gear rod (132) and the charging barrel (111), the gear rod (132) is located behind the charging barrel (111), and the second spring (133) is wound around the rear side of the piston rod (112); The missing gear (131) is connected to the left side of the second rotating shaft (94) in the middle of each group, and the missing gear (131) is meshed with the gear rod (132).

5. The gantry crane according to claim 4, characterized in that: It also includes a locking mechanism (14) for locking the roller (95), and the locking mechanism (14) includes: Second fixing rods (141), four groups of second fixing rods (141) are evenly connected to the lower side of the bracket (1); A rotating block (143) is rotatably connected to the second fixed rod (141); The pressure rod (142) and the rotating block (143) are both slidably connected to the pressure rod (142); A limiting rod (145) and an upper portion of the second fixing rod (141) are both connected to the limiting rod (145); A third spring (144) is connected between the pressure rod (142) and the rotating block (143). The pressure rod (142) passes through the rotating block (143), and the third spring (144) is wound around the pressure rod (142).

6. The gantry crane with a movable range according to claim 5, characterized in that: The inner sides of the pressure rods (142) are connected with rubber blocks.

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