A synchronous uniform force and constant speed variable diameter cylinder internal support circle mechanism

Abstract

The present invention discloses a synchronous uniform force and constant speed variable diameter cylinder internal support circle mechanism, which is used for the rounding of the rear cone body, the spiral blades of the rear cone body and the guide barrel of the concrete mixing drum before the robot automated welding, and the barrel body rotation power transmission and positioning, including a rear cone body rounding mechanism and a guide barrel positioning rounding mechanism, which are coaxially installed together, the guide barrel rounding mechanism is arranged on the front of the rear cone body rounding mechanism, the multiple rounding blocks form the internal support rear cone body barrel mouth correction circle, and the multiple rounding sliders form the internal support guide barrel correction circle. The present invention adopts two different structures of rounding mechanisms to cooperate, realize the rounding of the rear cone body of the mixing drum and its internal guide barrel before assembly welding, and the power transmission and positioning of the barrel body rotation displacement during the barrel body welding process (ensuring that the guide barrel and the rear cone barrel are coaxial), so that the welding precision is high and the time consumption is short, and its automated and semi-automated production can be realized, which greatly reduces the labor cost.

Description

Technical Field

[0001] The invention relates to a synchronous, uniform-force, constant-speed, diameter-changing cylinder internal support circle mechanism. Background Art

[0002] The mixing drum of a concrete mixer truck is mostly tilted on the frame through a supporting device and can rotate around its axis. There is only one barrel opening at the upper rear of the mixing drum for loading or unloading through the feeding and discharging devices.

[0003] Two continuous belt-shaped spiral blades are symmetrically welded along the inner wall of the mixing drum from the drum mouth to the drum bottom. When the mixing drum rotates, the two blades are driven to perform spiral motion around the axis of the mixing drum. This is the basic device for the mixing drum to mix or discharge concrete.

[0004] A material guide barrel is welded in the middle of the barrel mouth of the mixing drum, through which concrete is loaded into the mixing drum. The material guide barrel and the surrounding barrel walls form an annular discharge port.

[0005] In the current production process of mixing drums, the assembly and welding of the rear cone of the mixing drum and its internal material guide barrel are mainly carried out by spot welding the external drum, then hoisting the internal material guide barrel into the drum by a crane and lowering it, and then manually moving the material guide barrel to a suitable position before welding.

[0006] In the prior art, the moving precision of the crane is low and manual positioning is difficult, so the positioning of the cylinder takes a long time, the positioning error is large, and the welding precision is low. Summary of the invention

[0007] The object of the present invention is to provide a synchronous uniform force and uniform speed variable diameter cylinder internal support circle mechanism, so as to facilitate the assembly and welding of the rear cone cylinder body of the mixing cylinder and the internal material guide cylinder thereof.

[0008] To this end, the present invention provides a synchronous uniform force and constant speed variable diameter cylinder internal support mechanism, which is used for rounding and positioning the rear cone cylinder and the guide cylinder of the concrete mixing drum before welding, including a rear cone cylinder rounding mechanism and a guide cylinder rounding mechanism, which are coaxially installed together, and the rear cone cylinder rounding mechanism includes a base, a plurality of slideways radially distributed on the front of the base with the center of the base as the center of the circle, a rounding slider located in each slideway, a slewing bearing located on the back of the base with the center of the base as the rotation center, and a hydraulic cylinder for driving the slewing bearing to deflect, and also includes a hydraulic cylinder for driving each rounding slider to synchronously when the slewing bearing deflects. A first transmission mechanism for radial movement, the guide cylinder circle correction mechanism includes a fixed seat, a central driving cylinder arranged in the center of the front of the fixed seat, a plurality of guide seats arranged around the central driving cylinder, and a circle correction block located in each guide seat, a crank is provided on the front of the central driving cylinder, and also includes a second transmission mechanism for driving the plurality of circle correction blocks to move synchronously radially when the crank rotates around the axis of the central driving cylinder, wherein the guide cylinder circle correction mechanism is arranged on the front of the base, the plurality of circle correction blocks form a correction circle for the mouth of the inner support rear cone cylinder, and the plurality of circle correction sliders form a correction circle for the inner support guide cylinder.

[0009] Furthermore, the above-mentioned first transmission mechanism includes a double gear, a rack arranged in the slideway, and a ring gear arranged on the slewing bearing, wherein the double gear is arranged through the base and is respectively meshed with the ring gear and the rack for transmission, and the rack is fixedly connected to the circle calibration slider.

[0010] Furthermore, the above-mentioned second transmission mechanism includes a T-type screw ball screw, a lifting plate, and a connecting rod for driving the sliding tongue and the lifting plate, wherein the shaft end of the T-type screw ball screw is fixedly connected to the crank, and the lifting plate and the T-type screw ball screw form a screw nut pair.

[0011] Furthermore, the oil supply pipeline of the hydraulic cylinder includes a central swivel joint, wherein the central swivel joint is arranged on the back side of the base to supply oil to the hydraulic cylinder that rotates with the center of the base.

[0012] Furthermore, the roundness correction block has a sliding portion and a block portion extending perpendicularly to its sliding direction, and the block portion is used to suspend and support the material guide cylinder.

[0013] The present invention adopts two different structures of roundness calibration mechanisms to realize the roundness calibration and positioning of the rear cone body of the mixing drum and its internal material guide cylinder before assembly and welding. In this way, the welding accuracy is high and the time consumption is short. The automatic and semi-automatic production can be realized, which greatly reduces the labor cost. In addition, the two different structures of roundness calibration mechanisms have a certain ability to adapt to the diameter change of the cylinders they support.

[0014] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 It is a front structural schematic diagram of the synchronous uniform force and constant speed variable diameter cylinder internal circle supporting mechanism according to the present invention;

[0017] Figure 2 Shows Figure 1 A magnified schematic diagram of the local A in the middle;

[0018] Figure 3 It is a structural schematic diagram of the inner supporting circle mechanism of the material guide cylinder according to the present invention;

[0019] Figure 4 It is a schematic diagram of the back structure of the synchronous uniform force and constant speed variable diameter cylinder internal support circle mechanism according to the present invention;

[0020] Figure 5 It is a schematic diagram of the use state of the circle-supporting mechanism in the variable-diameter cylinder according to the present invention;

[0021] Figure 6 is a schematic diagram of the support mechanism in the variable diameter cylinder according to the present invention being installed on the tailstock; and

[0022] Figure 7 The present invention is a schematic diagram of the use state of the inner supporting circle mechanism of the variable diameter cylinder installed on the tailstock. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] Figures 1 to 7 Some embodiments according to the invention are shown.

[0025] The uniform force and uniform speed variable diameter cylinder internal support mechanism of the present invention comprises two parts: 1. a rear cone cylinder body rounding mechanism, which is used for rounding and positioning the rear cone cylinder body 100 of the mixing cylinder; 2. a guide cylinder rounding mechanism, which is used for rounding and positioning the guide cylinder 200. Figure 5 The two are coaxially mounted together, for example, mounted on the tailstock 300, as shown. Figure 6 and Figure 7 As shown, both are rotatable around the central axis.

[0026] 1. Calibration and positioning of the rear cone of the mixing drum

[0027] The rounding mechanism of the rear cone body comprises a central slewing joint 1, a fixed base 2, a double gear 3, a slewing bearing 4, a slewing bearing mounting plate 5, a mounting seat 6, a hydraulic cylinder 7, a rack 8, a slideway 9, a rounding block 10, and a connecting plate 11.

[0028] like Figure 1 and Figure 2 As shown, the cylinder head and the piston rod head of the hydraulic cylinder 7 are respectively fixed on the fixed base 2 and the slewing bearing mounting plate 5 through the mounting seat 6, the central slewing joint 1 is installed on the slewing bearing mounting plate 5 and the hydraulic pipeline is connected to the hydraulic cylinder 7 to supply oil for it, and the slewing bearing 4 is installed on the slewing bearing mounting plate 5 and meshes with the double gears 3 evenly distributed around it.

[0029] like Figure 3 As shown, one side of the double gear 3 is meshed with the slewing bearing 4, and the other side passes through the fixed base 2 and meshes with the rack 8. The rack 8 is connected with the circle alignment block 10 and the connecting plate 11 and can slide in the slideway 9 in the radial direction.

[0030] Since the piston rod head is fixed on the slewing bearing mounting plate 5, the piston rod of the hydraulic cylinder 7 will drive the slewing bearing 4 to rotate and drive the double gear 3 to rotate when it is extended, so that the rack 8 meshing with the double gear 3 will slide outward along the slideway 9 with the connecting plate 11 and the rounding stopper 10 until the rounding stopper 10 hits the cylinder body and rounds and positions it and then stops moving.

[0031] After the cylinder is moved to the installation position of the mechanism, the piston rod of the hydraulic cylinder extends to drive the slewing bearing 4 to rotate, thereby driving the double gears evenly distributed beside the slewing bearing and meshing with the slewing bearing. The other side of the gear meshes with the rack above, which can slide radially in the slideway along the radial direction, and the outside of the rack is connected to the circle alignment block.

[0032] Therefore, when the piston rod of the hydraulic cylinder extends, the calibration block connected to the rack will move radially along the slideway. When the calibration block moves to the cylinder, the calibration blocks evenly distributed around it will not move due to the obstruction of the cylinder, and the hydraulic cylinder overflows and stops moving, thereby achieving the calibration and positioning of the cylinder.

[0033] 2. Calibration and positioning of the guide barrel

[0034] like Figure 4 As shown, the guide barrel rounding mechanism and the mixing barrel rear cone rounding mechanism are coaxially installed together (see Figure 5), the crank 25, the central driving cylinder 24, the ball screw 26, and the lifting plate 27 pass through the fixed seat 21 and are coaxially installed together with the fixed seat 21, and the rounding block 22 is evenly distributed around the ball screw in the radial direction and is connected to the lifting plate 27 together with the connecting rod 23.

[0035] The ball screw 26 is made of T-shaped screw thread so that the ball screw has a motion self-locking function.

[0036] In the present invention, the guide seat 28 itself does not move, and provides support and sliding guidance for the radial movement of the roundness correction block 22. The roundness correction block 22 includes a sliding portion 22a and a block portion 22b extending perpendicular to the sliding direction, and the block portion is used to suspend and support the guide barrel.

[0037] After the rear cone body is calibrated and positioned, the guide barrel is moved to the fixed seat 21 of the guide barrel calibration mechanism. The worker drills into the guide barrel and manually turns the crank 25 to rotate the ball screw 26 so that the lifting plate 27 rises. At the same time, the connecting rod 23 rises and drives the calibration block 22 to move outward in the radial direction. When the calibration block 22 moves to the barrel, the worker stops turning the crank 25 because the barrel blocks it. The calibration blocks evenly distributed around will not move anymore, thus achieving the calibration and positioning of the barrel.

[0038] The synchronous uniform force and constant speed variable diameter cylinder supporting mechanism of the present invention can realize the rounding and positioning of cylinders with different diameters, thereby facilitating the assembly and welding of the rear cone cylinder of the mixing cylinder and the internal material guide cylinder thereof, and has high welding precision and short time consumption, and can realize its automatic and semi-automatic production, greatly reducing labor costs.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A synchronous uniform force and constant speed variable diameter cylinder internal support mechanism, characterized in that: It is used for rounding and positioning the rear cone and guide barrel of concrete mixing drum before welding, including the rounding mechanism of the rear cone and guide barrel, which are coaxially installed together. The rear cone body rounding mechanism comprises a base, a plurality of slideways radially distributed on the front of the base with the center of the base as the center of the circle, a rounding slider located in each slideway, a slewing bearing located on the back of the base with the center of the base as the rotation center, and a hydraulic cylinder for driving the slewing bearing to rotate, and also comprises a first transmission mechanism for driving each rounding slider to move synchronously radially when the slewing bearing rotates. The guide cylinder rounding mechanism comprises a fixed seat, a central driving cylinder arranged in the center of the front of the fixed seat, a plurality of guide seats arranged around the central driving cylinder, and rounding blocks located in each guide seat. A crank is arranged on the front of the central driving cylinder, and a second transmission mechanism is also included for driving the plurality of rounding blocks to move synchronously radially when the crank rotates around the axis of the central driving cylinder. The guide barrel rounding mechanism is arranged on the front of the base, the plurality of rounding blocks form a correction circle of the inner support rear cone barrel mouth, and the plurality of rounding sliders form a correction circle of the inner support guide barrel. The oil supply pipeline of the hydraulic cylinder includes a central swivel joint, wherein the central swivel joint is arranged on the back of the base to supply oil to the hydraulic cylinder rotating with the center of the base. The roundness correction block has a sliding portion and a block portion extending perpendicular to the sliding direction thereof, and the block portion is used for suspending and supporting the material guide cylinder. The first transmission mechanism includes a double gear, a rack arranged in the slideway, and a gear ring arranged on the slewing bearing, wherein the double gear is arranged through the base and meshes with the gear ring and the rack for transmission respectively, and the rack is fixedly connected to the circle correction slider. The second transmission mechanism includes a T-type screw ball screw, a lifting plate, and a connecting rod for driving the sliding tongue and the lifting plate, wherein the shaft end of the T-type screw ball screw is fixedly connected to the crank, and the lifting plate and the T-type screw ball screw form a screw nut pair.

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