A three-head propane grinder

Abstract

The present invention relates to a three-head propane grinder, comprising a frame with a roller at the lower end, a grinding head driven by a propane engine arranged at the front end of the frame, counterweight mechanisms for increasing the weight of the grinding head arranged at both sides of the lower part of the frame, a water tank for supplying water to the grinding head arranged at the rear part of the frame, a pull switch arranged on the water outlet pipe of the water tank, a handrail frame hinged at the upper side of the rear end of the frame, and a rotation adjustment mechanism arranged between the handrail frame and the frame. The three-head propane grinder ensures the stability of operation and facilitates the rotation adjustment of the handrail frame.

Description

Technical Field

[0001] The present invention relates to a three-head propane grinding machine. Background Art

[0002] The floor grinder is a multifunctional machine that integrates different processes such as fast sealing curing agent floor, hardened floor, epoxy floor treatment, stone renovation, concrete leveling, grinding, polishing, etc. At present, when the grinding head of the grinder equipped with a water tank needs to be replaced, it is necessary to press down the rear end operating lever of the grinder to lift the grinding head, which is inconvenient and laborious, and it is easy for the grinding head to reset due to the forward center of gravity. And because the water outlet valves of the grinder water tank are all located below the water tank, when the valves need to be opened and closed, you need to bend down and squat to open and close the valves, which will affect the work efficiency. Because the grinder is still in working condition when squatting, the staff cannot see the front, which will cause certain dangers, and it is easy to cause excessive grinding in one place, which will affect the quality of the finished product.

[0003] In order to store the handrail, reduce the space occupied during transportation, and adjust the height of the handrail, the floor grinder usually hinges the handrail with the frame of the grinder, and the positioning is completed through the positioning mechanism. In the positioning mechanism, in order to enable the positioning rod to automatically fit into the positioning slot after the pull rod is released, an elastic member is usually set between the positioning rod and the handrail. However, during use, the positioning rod often swings too far, causing damage to the elastic member. Summary of the invention

[0004] The object of the present invention is to provide a three-head propane grinder, which ensures the stability of operation and facilitates the rotation adjustment of the handrail frame.

[0005] The technical solution of the present invention is: a three-head propane grinder, including a frame with a roller at the lower end, a grinding head driven by a propane engine is arranged at the front end of the frame, counterweight mechanisms for increasing the weight of the grinding head are arranged on both sides of the lower part of the frame, a water tank for supplying water to the grinding head is arranged at the rear of the frame, a pull switch is arranged on the water outlet pipe of the water tank, an armrest frame is hinged on the upper side of the rear end of the frame, and a rotation adjustment mechanism is arranged between the armrest frame and the frame.

[0006] Furthermore, the counterweight mechanism includes a weighting iron whose front end is rotatably connected to the frame, and the front end of the weighting iron is also hinged with a gas spring, the other end of the gas spring is hinged to the front end side of the frame, and a supporting caster is installed at the bottom of the rear end of the weighting iron, and the supporting caster is connected to the weighting iron via a circular roller that vertically penetrates the weighting iron, and one end of the circular roller penetrates the weighting iron in a cone shape and is penetrated and fixedly connected to a fixed plate fixed to the outer surface of the weighting iron.

[0007] Furthermore, the weight iron is trapezoidal in shape, and a mounting groove is provided at one corner of the lower bottom for mounting supporting casters, and the fixing plate is fixedly connected to the weight iron by bolts.

[0008] Furthermore, a positioning pin is provided on the weight iron, and the positioning pin is perpendicular to the side surface of the weight iron. A pin limit seat is fixedly provided on the front end side of the frame to cooperate with the positioning pin and to be inserted and limited after the weight iron is rotated. A pin limit hole is provided on the pin limit seat, and a handle is installed on the outer side of the weight iron.

[0009] Furthermore, the pull switch includes a V-shaped lever, one end of which is hinged to a hinged support on the upper side wall of the water tank, a connecting rod is hinged to the middle of the lower end of the lever, the connecting rod extends downward and is hinged to a valve switch arranged on the water outlet pipe, and the valve is fixed to the water tank frame via a connecting plate.

[0010] Furthermore, the V-shaped opening of the lever faces upward and is an obtuse angle, the lower end of the hinged support is fixed to the water tank frame outside the water tank via an angle iron, the water tank frame and the water tank are fixed as one, and a limiting angle iron is also fixed on the inner side of the water tank frame, and a limiting hole is vertically penetrated on the horizontal section of the limiting angle iron, and the limiting hole extends horizontally in a strip shape and is passed through by a connecting rod.

[0011] Furthermore, the rotation adjustment mechanism includes a pair of connecting plates fixed to the upper side of the rear end of the frame and hinged to the armrest frame, a plurality of positioning slots are arranged at intervals on the arc surface of the connecting plates, an axle rod is transversely hinged in the armrest frame, a positioning rod for cooperating with the positioning slot is transversely fixed on the axle rod, a torsion spring is arranged between the axle rod and the armrest frame to keep the positioning rod stuck in the positioning slot at all times, a pulling rod for driving the axle rod to rotate is fixed to one end of the axle rod passing through the armrest frame, and an axle rod rotation limiting mechanism is arranged on the armrest frame.

[0012] Furthermore, the shaft rod rotation limiting mechanism is a limiting block fixed to the inner side of the handrail frame and located on the upper side of the positioning rod.

[0013] Furthermore, a throttle switch device for a propane engine is also provided on the handrail frame, and the throttle switch device includes a fixing sleeve which is provided on the handrail frame and protrudes upward, and the upper end of the fixing sleeve is closed and provided with a mounting hole, and a rotary regulator which is connected to one end of a throttle cable of the propane engine and realizes throttle adjustment by rotation is installed in the mounting hole, and a guide pipe for the throttle cable of the propane engine to pass through is installed in the handrail frame.

[0014] Furthermore, the rotary adjuster includes a fixed sleeve for connecting to the mounting hole, a connecting sleeve whose lower end abuts against the outer sleeve of the throttle cable is installed at the lower end of the fixed sleeve, a connecting rod connected to the throttle cable is passed through the connecting sleeve, and an adjusting screw with a knob fixed at the upper end and connected to the connecting rod at the lower end is threaded into the fixed sleeve.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The three-head propane grinder rotates downward at a uniform speed until the supporting casters contact the ground through the gravity of the weighted iron itself, so that the overall center of gravity of the grinder moves backward, and then the grinding head can be lifted by simply pressing down the grinder operating lever. While saving effort, the weighted iron can be rotated to different angles of the raised grinding head, ensuring the stability of the operation. The design of the fixed plate improves the supporting stability of the supporting casters.

[0016] 2. Due to the effect of the connecting rod, the horizontal height of the lever of the three-head propane grinder will be just convenient for the upright staff to manually operate, and the operation will be more convenient and labor-saving. The setting of the limit hole will limit the excessive swing of the connecting rod. The device is not only simple and reasonable in structure, but also convenient and safe in operation, ensuring the quality of the finished product.

[0017] 3. The switch device of the three-head propane grinder has a compact structure, which can better adjust the throttle size of the propane engine and is easy to use; the rotation adjustment mechanism has a simple structure, which can prevent the positioning rod from swinging too much and prevent the elastic part from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the weighted iron of the present invention;

[0020] Figure 3 For the present invention Figure 2 A magnified image of area A;

[0021] Figure 4 It is a schematic diagram of the pull switch structure of the present invention;

[0022] Figure 5 The structure diagram of the rotation adjustment mechanism of the present invention is shown in FIG. Figure 1 ;

[0023] Figure 6 The structure diagram of the rotation adjustment mechanism of the present invention is shown in FIG. Figure 2 ;

[0024] Figure 7 For the present invention Figure 5 A cross-sectional schematic diagram of CC;

[0025] Figure 8 It is a structural schematic diagram of the rotary regulator of the present invention;

[0026] In the figure: 10-frame 11-roller 20-grinding head 100-counterweight mechanism 110-weighted iron 111-round roller 112-fixed plate 113-bolt 114-positioning pin 115-pin limit seat 116-handle 117-round hole 118-installation groove 120-gas spring 130-support caster 140-positioning seat 200-water tank 201-water tank frame 210-shift lever 220-hinged support 221-angle iron 230-connecting rod 240-valve switch 241-connecting plate 242-water outlet pipe 250-limiting angle iron 251-limit Position hole 300-handrail frame 310-connecting plate 311-positioning slot 320-limiting block 321-threaded hole 330-axis rod 331-pull rod 332-fixing plate 333-torsion spring 340-positioning rod 341-end 400-throttle switch device 410-fixing sleeve 411-guide pipe 420-throttle cable 421-outer sleeve 430-rotation adjuster 431-fixing sleeve 432-connecting sleeve 433-connecting rod 434-adjusting screw 435-locking nut 436-connecting nut 437-groove 438-connecting protrusion. DETAILED DESCRIPTION

[0027] In order to make the above features and advantages of the present invention more understandable, embodiments are given below with reference to the accompanying drawings for detailed description, but the present invention is not limited thereto.

[0028] refer to Figures 1 to 8

[0029] A three-head propane grinder comprises a frame 10 with a roller 11 at the lower end, a grinding head 20 driven by a propane engine is arranged at the front end of the frame, counterweight mechanisms 100 for increasing the weight of the grinding head are arranged on both sides of the lower part of the frame, a water tank 200 for supplying water to the grinding head is arranged at the rear part of the frame, a pull switch is arranged on the water outlet pipe of the water tank, a handrail frame 300 is hinged on the upper side of the rear end of the frame, and a rotation adjustment mechanism is arranged between the handrail frame and the frame.

[0030] In this embodiment, the counterweight mechanism includes a weight iron 110 whose front end is rotatably connected to the frame. The front end of the weight iron is also hinged with a gas spring 120. The other end of the gas spring is hinged with the front end side of the frame to provide buffering when the weight iron is rotated and opened. A supporting caster 130 is installed at the bottom of the rear end of the weight iron. The supporting caster is connected to the weight iron via a round roller 111 vertically penetrated by the weight iron, and the supporting caster can rotate around the round roller. One end of the round roller passes through the weight iron in a cone shape and is penetrated and fixed to a fixed plate 112 fixed to the outer surface of the weight iron. A round hole 117 is opened on the fixed plate and inserted through the round roller. The gap between the cone and the round hole is used for welding and fixing.

[0031] In this embodiment, the weight iron is rotatably connected to the frame via a rotating shaft and a bearing. The weight iron is trapezoidal, and one corner of the bottom thereof is provided with a mounting groove 118 for mounting a supporting caster, and the fixing plate is fixedly connected to the weight iron via bolts 113.

[0032] In this embodiment, a positioning pin 114 is provided on the weight iron, and the positioning pin is perpendicular to the side surface of the weight iron. A pin limit seat 115 is fixed on the front end side of the frame to cooperate with the positioning pin and to be inserted and limited after the weight iron rotates. A pin limit hole is opened on the pin limit seat, and the positioning pin is a spring pin.

[0033] In this embodiment, in order to facilitate the rotation of the weight iron, a handle 116 is installed on the outer side of the weight iron. The front part of the frame is also provided with a positioning seat 140 for the weight iron to rotate to the front side and cooperate with the weight iron.

[0034] When the grinding head needs to be lifted for maintenance or replacement, pull out the pin inserted into the pin shaft limit hole, and then rotate the weighted iron downward at a constant speed under its own gravity until the supporting casters contact the ground, so that the overall center of gravity of the grinder moves backward, and then press the grinder downward and rotate it around the rear wheel of the grinder. The grinding head is lifted and can be replaced, and the weight block can rotate at different angles in coordination with the lifting of the grinding head.

[0035] In this embodiment, the pull switch includes a V-shaped lever 210, one end of which is hinged to a hinged support 220 on the upper side wall of the water tank to achieve up and down swinging. A connecting rod 230 is hinged to the middle of the lower end of the lever, and the connecting rod extends downward and is hinged to a valve switch 240 arranged on the water outlet pipe 242. The valve is fixed to the water tank frame 201 via a connecting plate 241.

[0036] In this embodiment, the V-shaped opening of the lever faces upward and is an obtuse angle. The lower end of the hinged support is fixed to the water tank frame outside the water tank through an angle iron 221. The water tank frame and the water tank are fixed as a whole. A limiting angle iron 250 is also fixed on the inner side of the water tank frame. The limiting angle iron is located near the upper end of the connecting rod. The vertical section of the limiting angle iron is fixed to the inner side of the water tank frame by bolts. A limiting hole 251 is vertically penetrated on the horizontal section of the limiting angle iron. The limiting hole extends horizontally in a strip shape and is passed through by the connecting rod.

[0037] In this embodiment, the rotation adjustment mechanism includes a pair of connecting plates 310 fixed on the upper side of the rear end of the frame and hinged to the handrail frame, and a plurality of positioning slots 311 are arranged at intervals on the arc surface of the connecting plate. An axle rod 330 is hinged transversely in the handrail frame, and a positioning rod 340 for cooperating with the positioning slot is transversely fixed on the axle rod. A torsion spring 333 is arranged between the axle rod and the handrail frame to keep the positioning rod stuck in the positioning slot at all times. One end of the torsion spring is connected to the handrail frame, and the other end of the torsion spring is connected to the fixed plate; a pulling rod 331 for driving the rotation of the axle rod is fixed to one end of the axle rod passing through the handrail frame, and a shaft rod rotation limiting mechanism is arranged on the handrail frame.

[0038] In this embodiment, in order to facilitate the connection between the positioning rod and the shaft rod, the two sides of the positioning rod are fixedly connected to the shaft rod via fixing plates 332, and the two ends of the positioning rod are respectively provided with end heads 341 for embedding in the positioning slots.

[0039] In this embodiment, in order to prevent the positioning rod from rotating excessively upward and causing damage to the torsion spring, the shaft rod rotation limiting mechanism is a limiting block 320 fixed to the inner side of the handrail frame and located on the upper side of the positioning rod to complete the swing limiting of the positioning.

[0040] In this embodiment, in order to facilitate the installation of the limit block, a threaded hole 321 is provided on the handrail frame, and one end of the limit block is threadedly connected to the screw rod.

[0041] When the handrail needs to be rotated, the pull rod is pressed downward to rotate the shaft rod by pulling the rod, thereby swinging the positioning rod upward to disengage the positioning rod from the positioning slot so that the handrail can be rotated. When it is rotated to the desired position, the pull rod is released, and the positioning rod is embedded in the positioning slot under the force of the torsion spring to complete the positioning of the handrail.

[0042] In this embodiment, a throttle switch device 400 of a propane engine is also provided on the handrail frame, and the throttle switch device includes a fixing sleeve 410 which is provided on the handrail frame and protrudes upward, and the upper end of the fixing sleeve is closed and provided with a mounting hole, and a rotary regulator 430 which is connected to one end of a throttle cable 420 of the propane engine and realizes throttle adjustment by rotation is installed in the mounting hole, and a guide pipe 411 for the throttle cable of the propane engine to pass through is installed in the handrail frame.

[0043] In this embodiment, the rotary regulator includes a fixed sleeve 431 for connecting to the mounting hole, a connecting sleeve 432 is installed at the lower end of the fixed sleeve, and the lower end of the connecting sleeve is abutted against the outer sleeve 421 of the throttle cable, and a connecting rod 433 connected to the throttle cable is passed through the connecting sleeve, and an adjusting screw 434 is threaded in the fixed sleeve, and the upper end of the knob is fixed and the lower end is connected to the connecting rod, so that the throttle can be adjusted by rotating the adjusting screw.

[0044] In this embodiment, in order to achieve the connection between the fixed sleeve and the mounting hole of the fixed sleeve, the upper and lower parts of the fixed sleeve are respectively provided with external threads, and the upper end of the fixed sleeve is fixedly connected to the mounting hole via a locking nut 435.

[0045] In this embodiment, in order to connect the connecting sleeve with the fixed sleeve, an annular flange is provided at the upper end of the connecting sleeve, and a connecting nut 436 threadedly connected to the lower end of the fixed sleeve is sleeved on the connecting sleeve.

[0046] In this embodiment, in order to connect the throttle cable to the connecting rod, the lower end of the connecting rod is fixedly connected to the throttle cable, the upper end of the connecting rod is provided with a slot 437, and the lower end of the adjusting screw is provided with a connecting protrusion 438 embedded in the connecting slot.

[0047] When the throttle switch device is used, the throttle cable is stretched by rotating the adjusting screw rod clockwise, thereby increasing the throttle of the propane engine, and the throttle is reduced by rotating the adjusting screw rod counterclockwise.

[0048] The above description is only a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, designing different forms of three-head propane grinders does not require creative labor. Without departing from the principle and spirit of the present invention, all equal changes, modifications, substitutions and variations made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A three-head propane grinding machine, comprising a frame with rollers at the lower end, characterized in that: A grinding head driven by a propane engine is arranged at the front end of the frame, counterweight mechanisms for increasing the weight of the grinding head are arranged on both sides of the lower part of the frame, a water tank for supplying water to the grinding head is arranged at the rear part of the frame, a pull switch is arranged on the water outlet pipe of the water tank, an armrest frame is hinged on the upper side of the rear end of the frame, and a rotation adjustment mechanism is arranged between the armrest frame and the frame; the counterweight mechanism includes a weighting iron whose front end is rotatably connected to the frame, and a gas spring is also hinged at the front end of the weighting iron, and the other end of the gas spring is hinged to the front end side of the frame, and supporting casters are installed at the bottom of the rear end of the weighting iron; the pull switch includes a V-shaped lever, one end of which is hinged to the water tank The hinged supports of the upper side walls are hinged, and a connecting rod is hinged at the middle part of the lower end of the lever, which extends downward and is hinged to a valve switch arranged on the water outlet pipe, and the valve is fixed to the water tank frame via a connecting plate; the rotation adjustment mechanism includes a pair of connecting plates fixed to the upper side of the rear end of the frame and hinged to the handrail frame, and a plurality of positioning grooves are arranged at intervals on the arc surface of the connecting plate, and an axle rod is hinged transversely in the handrail frame, and a positioning rod for cooperating with the positioning groove is transversely fixed on the axle rod, and a torsion spring is arranged between the axle rod and the handrail frame to keep the positioning rod stuck in the positioning groove at all times, and a pulling rod for driving the rotation of the axle rod is fixed to one end of the axle rod passing through the handrail frame, and a shaft rod rotation limiting mechanism is arranged on the handrail frame.

2. A three-head propane grinding machine according to claim 1, characterized in that: The supporting caster is connected to the weighted iron via a round roller through which the weighted iron is vertically penetrated, and one end of the round roller penetrates the weighted iron in a cone shape and is penetrated and fixedly connected to a fixing plate fixedly connected to the outer surface of the weighted iron.

3. A three-head propane grinding machine according to claim 2, characterized in that: The weighted iron is trapezoidal in shape, and a mounting groove is provided at one corner of the lower bottom to mount a supporting caster, and the fixing plate is fixedly connected to the weighted iron by bolts.

4. A three-head propane grinding machine according to claim 2 or 3, characterized in that: A positioning pin is passed through the weight iron, and the positioning pin is perpendicular to the side surface of the weight iron. A pin limit seat is fixed on the front end side of the frame, which cooperates with the positioning pin and is inserted and limited after the weight iron rotates. A pin limit hole is opened on the pin limit seat, and a handle is installed on the outer side of the weight iron.

5. A three-head propane grinding machine according to claim 1, characterized in that: The V-shaped opening of the lever faces upward and is an obtuse angle. The lower end of the hinged support is fixed to the water tank frame outside the water tank via an angle iron. The water tank frame and the water tank are fixed as one. A limiting angle iron is also fixed to the inner side of the water tank frame. A limiting hole is vertically penetrated through the horizontal section of the limiting angle iron. The limiting hole extends horizontally in a strip shape and is passed through by a connecting rod.

6. A three-head propane grinding machine according to claim 1, characterized in that: The shaft rod rotation limiting mechanism is a limiting block fixed on the inner side of the handrail frame and located on the upper side of the positioning rod.

7. A three-head propane grinding machine according to claim 1, 2, 3, 5 or 6, characterized in that: The armrest is also provided with a throttle switch device for a propane engine, and the throttle switch device includes a fixing sleeve which is provided on the armrest and protrudes upward, the upper end of the fixing sleeve is closed and provided with a mounting hole, a rotary regulator which is connected to one end of a throttle cable of the propane engine and realizes throttle adjustment by rotation is installed in the mounting hole, and a guide pipe for the throttle cable of the propane engine to pass through is installed in the armrest.

8. A three-head propane grinding machine according to claim 7, characterized in that: The rotary adjuster includes a fixed sleeve for connecting to the mounting hole, a connecting sleeve whose lower end abuts against the outer sleeve of the throttle cable is installed at the lower end of the fixed sleeve, a connecting rod connected to the throttle cable is passed through the connecting sleeve, and an adjusting screw with a knob fixed at the upper end and connected to the connecting rod at the lower end is threaded in the fixed sleeve.

Images