Quantitative discharging device for anti-freezing material in anti-freezing asphalt mixture

Abstract

The invention discloses a quantitative discharging device for an anti-freezing material in an anti-freezing asphalt mixture, and belongs to the technical field of discharging equipment, the quantitative discharging device comprises a material conveying belt, a feeding machine cover is fixed on one side of the material conveying belt; the fixing frames are horizontally fixed to the upper end face of the material conveying belt, and the two fixing frames are arranged in an arrayed mode. The main discharging unit is fixed to the portion, away from one side of the feeding machine cover, of the fixing frame, and a material supplementing unit is installed on the other fixing frame. The side baffles are symmetrically installed on the two sides of the material conveying belt in parallel. The weighing system is arranged below the belt of the material conveying belt; the main discharging unit can evenly convey the anti-freezing material to the material conveying belt through the discharging plate, the weighing system in the material conveying belt monitors and records the weight of the anti-freezing material conveyed on the surface of the weighing system in real time, when the discharging amount of the anti-freezing material is insufficient, the supplementing unit can conduct supplementing conveying in time, and the anti-freezing material conveying efficiency is improved. Therefore, quantitative blanking of the anti-freezing material is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of blanking equipment, and specifically relates to a quantitative blanking device for anti-icing materials in anti-icing asphalt mixtures. Background Art

[0002] In cold regions, the problem of road icing has always been a serious hidden danger to winter traffic safety. To solve this problem, anti-icing asphalt mixtures, as a new type of pavement material, are widely used. Anti-icing asphalt mixtures are usually composed of ordinary asphalt mixtures and a certain proportion of anti-icing materials (such as antifreeze, snowmelt agents, or special modified materials), which can effectively prevent road surfaces from icing in low-temperature environments, improve the anti-skid performance of roads and driving safety. In the preparation of asphalt mixtures, anti-icing material particles are prone to poor fluidity in hoppers or pipelines due to high viscosity, strong hygroscopicity, or irregular particle shapes, resulting in bridging (materials accumulating on the top of the hopper and unable to flow smoothly) or blockage phenomena. At the same time, the unstable fluidity of granular materials will cause fluctuations in the blanking volume and cannot achieve accurate quantitative blanking. Summary of the Invention

[0003] To achieve the above object, the present invention provides the following technical solution: A quantitative blanking device for anti-icing materials in anti-icing asphalt mixtures, which includes: a material conveyor belt, on one side of which an inlet machine cover is fixed; a fixed frame, horizontally fixed on the upper end surface of the material conveyor belt, and the fixed frame is composed of two arranged in a row; a main blanking unit, fixed on the fixed frame on the side far from the inlet machine cover, and a supplementary feeding unit is installed on the other fixed frame; side baffles, symmetrically installed in parallel on both sides of the material conveyor belt; a weighing system, arranged under the belt of the material conveyor belt, and the weighing system is located between the main blanking unit and the supplementary feeding unit.

[0004] Preferably, the main blanking unit and the supplementary feeding unit have the same composition structure; the main blanking unit includes: a side frame, on the upper end surface of which a material guiding cover is fixed, and a material guiding plate is obliquely fixed inside the side frame below the material guiding cover; a blanking plate, installed on the side frame and located below the material guiding plate; a storage tank, vertically and centrally installed in the material guiding cover, and a flow control nozzle is arranged at the lower end of the storage tank.

[0005] Preferably, two rotating shafts are arranged in parallel on the side frame, the two rotating shafts are distributed vertically, and cross frames are fixed on the rotating shafts. The cross frame located above is fixed to the blanking plate; the ends of the two cross frames are respectively connected by connecting rods, and a hydraulic telescopic rod is installed at the lower end of the side frame, and one end of the hydraulic telescopic rod is connected to the cross frame located below.

[0006] Preferably, an installation groove is arranged inside the blanking plate, and an oscillator is configured in the installation groove.

[0007] Preferably, an outer cylinder is coaxially sleeved outside the stock bin, and the lower end of the outer cylinder is fixed to the material guiding cover through a plurality of support rods; a plurality of inner springs are circumferentially distributed between the outer cylinder and the stock bin; a pulse vibration device is installed on the side wall of the outer cylinder, and the vibration output end of the pulse vibration device is connected to the stock bin.

[0008] Preferably, a plurality of leaf plates distributed circumferentially are adopted below the flow control nozzle. The upper ends of the leaf plates are all rotatably connected to the flow control nozzle. An adjusting ring is coaxially rotatably connected outside the flow control nozzle. A plurality of inclined slot holes are formed in the outer peripheral wall of the adjusting ring. Guide pins are fixed on the side walls of the upper ends of the leaf plates, and the guide pins are slidably assembled corresponding to the inclined slot holes.

[0009] Preferably, a beam frame is horizontally fixed in the stock bin, a vibration pipe is fixed at the center of the beam frame, and two collar sleeves are slidably arranged on the vibration pipe. A plurality of vertically arranged material guiding rods are distributed on the outer circumference of the collar sleeves, and the material guiding rods are connected to the two collar sleeves through an X-shaped connecting frame; a vibration transmission frame is hinged on a plurality of the leaf plates, a guide rod is hinged in the middle of the vibration transmission frame, the upper end of the guide rod is connected to a sliding ring slidably arranged on the vibration pipe, and the sliding ring is fixed to the upper collar sleeve through a plurality of vertically fixed connecting rods.

[0010] Preferably, an inner rod is coaxially rotatably connected in the vibration pipe, and a plurality of eccentric masses are distributed on the inner rod; a sleeve is slidably arranged at the position of the lower collar sleeve in the vibration pipe, the sleeve is fixed to the collar sleeve through a plurality of radially distributed connecting shafts, and a limiting spring is arranged between the sleeve and the vibration pipe; a top shaft is fixed on the inner rod, the top shaft abuts against the lower end surface of the sleeve, and the contact surface thereof is arranged as an inclined tooth surface structure.

[0011] Preferably, the lower end of the inner rod extends into the flow control nozzle, a transmission sleeve is rotatably sleeved on the inner rod, and the other end of the vibration transmission frame is hinged to the transmission sleeve.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The main feeding unit provided in the present invention can evenly convey the anti-icing material to the material conveyor belt through the feeding plate, and the weighing system in the material conveyor belt monitors and records the weight of the anti-icing material conveyed on its surface in real time. When the feeding amount of the anti-icing material is insufficient, the feeding unit can timely conduct supplementary feeding and conveying, so as to ensure the quantitative feeding of the anti-icing material; among them, during the feeding process, the main feeding unit and the feeding unit can, according to the particle shape, size, feeding amount and adhesiveness of the anti-icing material, use a feeding port of an appropriate size by the flow control nozzle for feeding, ensuring the smoothness and high efficiency of the feeding process and realizing the precise control of the feeding amount; in addition, the vibration tube provided in the storage tank can generate centrifugal vibration through the inner rod inside it under the rotation action. On the one hand, it vibrates and shakes the anti-icing material near the flow control nozzle, effectively preventing the anti-icing material from condensing or blocking due to moisture or viscosity near the storage tank and the flow control nozzle, ensuring the fluidity of the material; on the other hand, it can fully shake the anti-icing material in the storage tank through multiple guide rods, avoiding local material accumulation or empty material phenomena during the feeding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 is a schematic diagram of the structure of the main feeding unit in the present invention;

[0015] Figure 3 is a schematic diagram of the internal structure of the main feeding unit in the present invention;

[0016] Figure 4 is a schematic diagram of the structure of the flow control nozzle in the present invention;

[0017] Figure 5 is a schematic diagram of the internal structure of the storage tank in the present invention;

[0018] Figure 6 is a partial schematic diagram of the vibration tube in the present invention;

[0019] In the figure: 1. Material conveyor belt; 11. Feeding machine cover; 12. Side baffle; 13. Fixed frame; 14. Feeding unit; 2. Main feeding unit; 21. Side frame; 22. Guide hood; 23. Guide plate; 24. Outer cylinder; 25. Inner spring; 3. Feeding plate; 31. Rotating shaft; 32. Connecting rod; 33. Hydraulic telescopic rod; 34. Oscillator; 4. Storage tank; 41. Beam frame; 42. Ring sleeve; 43. Guide rod; 44. X connecting frame; 45. Vibration transmission frame; 46. Slip ring; 47. Connecting rod; 48. Transmission sleeve; 5. Flow control nozzle; 51. Blade; 52. Adjusting ring; 53. Oblique slot hole; 54. Guide pin; 6. Vibration tube; 61. Inner rod; 62. Eccentric mass; 63. Bush; 64. Top shaft. Detailed implementation mode

[0020] Please refer to Figures 1-6 In the embodiment of the present invention, a quantitative feeding device for an anti-icing material in an anti-icing asphalt mixture includes:

[0021] A material conveyor belt 1, on one side of which an inlet machine cover 11 is fixed, and the discharge port of the inlet machine cover 11 can be connected to the inlet port of an external mixing device;

[0022] A fixing frame 13 is horizontally fixed on the upper end surface of the material conveyor belt 1, and two fixing frames 13 are arranged in a row;

[0023] A main feeding unit 2 is fixed on the fixing frame 13 on the side far from the inlet machine cover 11, and a supplementary feeding unit 14 is installed on the other fixing frame 13;

[0024] Side baffles 12 are symmetrically installed in parallel on both sides of the material conveyor belt 1, which can effectively prevent the anti-icing material from falling from the left and right sides of the material conveyor belt 1;

[0025] A weighing system (not shown in the figure) is arranged under the belt of the material conveyor belt 1, and the weighing system is located between the main feeding unit 2 and the supplementary feeding unit 14. That is to say, the weighing system can monitor and record the weight of the anti-icing material conveyed by the main feeding unit 2 on the material conveyor belt 1 in real time to ensure the accuracy and consistency of the material addition amount, and the supplementary feeding unit 14 can timely supplement the anti-icing material when the conveying weight of the anti-icing material is abnormal (such as material shortage or blockage) to avoid performance fluctuations of the mixture caused by insufficient materials.

[0026] In this embodiment, the main feeding unit 2 and the supplementary feeding unit 14 have the same composition structure; the main feeding unit 2 includes:

[0027] A side frame 21, on the upper end surface of which a guide material cover 22 is fixed, and a guide material plate 23 is inclined and fixed inside the side frame 21 under the guide material cover 22;

[0028] A feeding plate 3 is installed on the side frame 21 and is located under the guide material plate 23 so that the anti-icing material on the guide material plate 23 can fully fall onto the feeding plate 3;

[0029] A storage tank 4 is vertically and centrally installed in the guide material cover 22, and a flow control nozzle 5 is arranged at the lower end of the storage tank 4 so as to vertically drop and convey the anti-icing material through the flow control nozzle 5.

[0030] As a preferred embodiment, two rotating shafts 31 are arranged in parallel on the side frame 21, the two rotating shafts 31 are distributed up and down, and cross frames are fixed on the rotating shafts 31. The cross frame located above is fixed to the feeding plate 3;

[0031] The end parts of the two cross frames are respectively connected by a connecting rod 32. The two cross frames and the two connecting rods 32 can be combined to form a parallelogram linkage mechanism. A hydraulic telescopic rod 33 is installed at the lower end of the side frame 21. One end of the hydraulic telescopic rod 33 is connected to the lower cross frame. Therefore, during the telescopic adjustment of the hydraulic telescopic rod 33, the blanking plate 3 can be erected at different inclination angles with the deflection of the cross frame, so as to dynamically adjust the feeding angle according to the blanking flow rate, ensuring the flexibility and efficiency of material transportation. At the same time, when the quantitative blanking of the anti-icing material reaches the expected value, the hydraulic telescopic rod 33 can control the blanking plate 3 to rotate counterclockwise in time to realize the timely collection of the excess anti-icing material.

[0032] In this embodiment, an installation groove is provided in the blanking plate 3, and an oscillator 34 is arranged in the installation groove, so that the anti-icing material can be dispersed and transported when passing through the blanking plate 3, preventing the material from sticking due to viscosity or moisture, and reducing the residence time of the material on the blanking plate 3 to a certain extent, thereby improving the overall blanking efficiency.

[0033] In this embodiment, an outer cylinder 24 is coaxially sleeved outside the storage tank 4. The lower end of the outer cylinder 24 is fixed to the material guiding cover 22 through a plurality of support rods. A plurality of inner springs 25 are circumferentially distributed between the outer cylinder 24 and the storage tank 4.

[0034] A pulse vibration device (not shown in the figure) is installed on the side wall of the outer cylinder 24, and the vibration output end of the pulse vibration device is connected to the storage tank 4. Especially during the blanking process, the pulse vibration device can continuously work at a high frequency to make the storage tank 4 vibrate and shake as a whole, so that the anti-icing material inside it can be quickly blanked under the action of vibration, reducing the probability of blockage.

[0035] In this embodiment, a plurality of leaf plates 51 are arranged below the flow control nozzle 5, and the upper ends of the leaf plates 51 are rotatably connected to the flow control nozzle 5. An adjusting ring 52 is coaxially rotatably connected outside the flow control nozzle 5. A plurality of inclined slot holes 53 are formed in the outer peripheral wall of the adjusting ring 52. A guide pin 54 is fixed on the side wall of the upper end of the leaf plate 51, and the guide pin 54 is slidably assembled corresponding to the inclined slot holes 53. A driving motor is arranged in the flow control nozzle 5, which can drive the adjusting ring 52 to deflect forward and backward through the gear meshing action. Therefore, during the deflection of the adjusting ring 52, it can control the leaf plates 51 to deflect close to or away from the center of the circle through the sliding of the guide pins 54 and the inclined slot holes 53, so as to adjust the blanking and conveying caliber, so as to dynamically adjust according to the specific blanking amount during use, ensuring both the smoothness of blanking and the blanking accuracy. It should be noted that the blanking and conveying caliber of the flow control nozzle 5 in the feeding supplement unit 14 is generally not larger than that of the flow control nozzle 5 in the main feeding unit 2, so as to realize more accurate feeding and conveying in the later stage.

[0036] As a preferred embodiment, a beam frame 41 is horizontally fixed inside the storage tank 4. A vibration tube 6 is fixed at the center of the beam frame 41. The vibration tube 6 can achieve the vibration guiding effect of the anti-icing material at the central position of the storage tank 4 during operation. Two collar sleeves 42 are slidably arranged on the vibration tube 6. A plurality of vertically arranged guiding rods 43 are distributed on the outer circumference of the collar sleeve 42. The guiding rods 43 are connected to the two collar sleeves 42 through an X-shaped connecting frame 44. When the distance between the two collar sleeves 42 becomes smaller, each guiding rod 43 can gradually move away from the center of the circle through the X-shaped connecting frame 44, so as to effectively control the specific placement position of each guiding rod 43, and it is convenient to provide the vibration guiding effect for the anti-icing materials at different positions in the storage tank 4 in combination with the vibration tube 6.

[0037] A vibration transmission frame 45 is hinged on a plurality of the blade plates 51. A guiding rod is hinged in the middle of the vibration transmission frame 45. The upper end of the guiding rod is connected to a sliding ring 46 slidably arranged on the vibration tube 6. The sliding ring 46 is fixed to the upper collar sleeve 42 through a plurality of vertically fixed connecting rods 47. Therefore, when the blade plates 51 in the flow control nozzle 5 gradually approach the center of the circle (the feeding and conveying diameter becomes smaller), each guiding rod can push the upper collar sleeve 42 to slide upward through the connecting rod 47. At this time, each guiding rod 43 can gradually approach the center of the circle through the X-shaped connecting frame 44, so that each guiding rod 43 can fully provide the vibration guiding effect for the anti-icing materials near the central position of the storage tank 4 in combination with the vibration tube 6. When the blade plates 51 in the flow control nozzle 5 gradually move away from the center of the circle (the feeding and conveying diameter becomes larger), each guiding rod can push the upper collar sleeve 42 to slide downward through the connecting rod 47. At this time, each guiding rod 43 can gradually move away from the center of the circle through the X-shaped connecting frame 44, so that each guiding rod 43 can fully provide the vibration guiding effect for the anti-icing materials near the inner wall of the storage tank 4, which is convenient to provide an effective vibration guiding for the overall anti-icing materials, further improving the feeding speed and avoiding internal accumulation and blockage.

[0038] In this embodiment, an inner rod 61 is coaxially rotatably connected inside the vibration tube 6. A plurality of eccentric masses 62 are distributed on the inner rod 61. Therefore, the inner rod 61 can provide a centrifugal vibration effect for the vibration tube 6 during continuous rotation, with a high frequency, effectively preventing the anti-icing material from coagulating or blocking during the conveying process and ensuring the smooth flow of the material.

[0039] A shaft sleeve 63 is slidably arranged at the position of the lower collar sleeve 42 inside the vibration tube 6. The shaft sleeve 63 is fixed to the collar sleeve 42 through a plurality of radially distributed connecting shafts. A limiting spring is arranged between the shaft sleeve 63 and the vibration tube 6.

[0040] A top shaft 64 is fixed on the inner rod 61. The top shaft 64 abuts against the lower end surface of the shaft sleeve 63, and its contact surface is set as an inclined tooth surface structure. Especially during the continuous rotation of the inner rod 61, it can realize the high-frequency axial reciprocating sliding of the lower ring sleeve 42 through the contact action between the top shaft 64 and the inclined tooth surface of the shaft sleeve 63, so that each material guiding rod 43 can achieve a radial vibration effect during the high-frequency axial reciprocating sliding of the ring sleeve 42, further enhancing the vibration material guiding of the anti-icing material.

[0041] In this embodiment, the lower end of the inner rod 61 extends into the flow control nozzle 5. A transmission sleeve 48 is rotatably sleeved on the inner rod 61. The other end of the vibration transmission frame 45 is hinged to the transmission sleeve 48. The centrifugal vibration generated by the operation of the inner rod 61 can be transmitted to the vibration transmission frame 45 through the transmission sleeve 48, and can also be transmitted to the vane 51 of the flow control nozzle 5 to a certain extent, ensuring the full distribution of vibration energy in the entire flow control nozzle 5, improving the overall vibration material guiding effect, further enhancing the anti-blocking performance of the flow control nozzle 5, and avoiding blockage caused by material viscosity or moisture. Especially during the adjustment of the conveying diameter, the continuity and stability of the material are ensured.

[0042] Specifically, the anti-icing material can be stored in the storage tanks 4 of the main feeding unit 2 and the supplementary feeding unit 14 respectively. The main feeding unit 2 can dynamically adjust the size of the feeding and conveying diameter of the flow control nozzle 5 according to the specific feeding amount of the anti-icing material, so as to ensure both the smoothness of feeding and the feeding accuracy. Among them, after the anti-icing material vertically falls through the flow control nozzle 5, it can fall onto the feeding plate 3 through the guide plate 23. The feeding plate 3 can be erected at a corresponding inclination angle under the telescopic adjustment of the hydraulic telescopic rod 33 to ensure the flexibility and high efficiency of material conveying. Then it can fall onto the material conveyor belt 1. At this time, the weighing system can monitor and record the weight of the anti-icing material conveyed on the material conveyor belt 1 in real time. When the conveying weight of the anti-icing material is abnormal (such as material shortage or blockage), the supplementary feeding unit 14 supplies the anti-icing material to avoid performance fluctuations of the mixture caused by shortage, so as to realize the quantitative feeding of the anti-icing material and ensure the accuracy of the feeding amount.

[0043] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A quantitative feeding device for anti-icing materials in an anti-icing asphalt mixture, characterized in that, It includes: A material conveyor belt (1) with a feeding machine cover (11) fixed on one side thereof; A fixing frame (13) horizontally fixed on the upper end surface of the material conveyor belt (1), and there are two fixing frames (13) arranged in a row; A main blanking unit (2) fixed on the fixing frame (13) on the side away from the feeding machine cover (11), and a supplementary feeding unit (14) is installed on the other fixing frame (13); Side baffles (12) symmetrically installed in parallel on both sides of the material conveyor belt (1); A weighing system arranged under the belt of the material conveyor belt (1), and the weighing system is located between the main blanking unit (2) and the supplementary feeding unit (14).

2. The quantitative feeding device for the anti-icing material in the anti-icing asphalt mixture according to claim 1, characterized in that, The main blanking unit (2) and the supplementary feeding unit (14) have the same composition structure; the main blanking unit (2) includes: A side frame (21) with a material guiding cover (22) fixed on its upper end surface, and a material guiding plate (23) is obliquely fixed inside the side frame (21) below the material guiding cover (22); A blanking plate (3) installed on the side frame (21) and located below the material guiding plate (23); A storage tank (4) vertically centered and installed in the material guiding cover (22), and a flow control nozzle (5) is arranged at the lower end of the storage tank (4).

3. The quantitative feeding device for the anti-icing material in the anti-icing asphalt mixture according to claim 2, characterized in that, Two rotating shafts (31) are arranged in parallel on the side frame (21), and the two rotating shafts (31) are distributed vertically. Cross frames are fixed on the rotating shafts (31), and the cross frame located above is fixed to the blanking plate (3); The ends of the two cross frames are respectively connected by a connecting rod (32), and a hydraulic telescopic rod (33) is installed at the lower end of the side frame (21), and one end of the hydraulic telescopic rod (33) is connected to the cross frame located below.

4. The quantitative feeding device for the anti-icing material in the anti-icing asphalt mixture according to claim 3, characterized in that, An installation groove is arranged in the blanking plate (3), and an oscillator (34) is arranged in the installation groove.

5. The quantitative feeding device for the anti-icing material in the anti-icing asphalt mixture according to claim 2, characterized in that, An outer cylinder (24) is coaxially sleeved outside the storage tank (4), and the lower end of the outer cylinder (24) is fixed to the material guiding cover (22) through a plurality of support rods; a plurality of inner springs (25) are circumferentially distributed between the outer cylinder (24) and the storage tank (4); A pulse vibration device is installed on the side wall of the outer cylinder (24), and the vibration output end of the pulse vibration device is connected to the storage tank (4).

6. The quantitative feeding device for the anti-icing material in the anti-icing asphalt mixture according to claim 2, characterized in that, Below the flow control nozzle (5), a plurality of leaf plates (51) are arranged in a circular distribution. The upper ends of the leaf plates (51) are rotatably connected to the flow control nozzle (5). An adjusting ring (52) is coaxially rotatably connected outside the flow control nozzle (5). A plurality of inclined slot holes (53) are formed in the outer peripheral wall of the adjusting ring (52). A guide pin (54) is fixed on the upper end side wall of the leaf plate (51), and the guide pin (54) is slidably assembled corresponding to the inclined slot holes (53).

7. The quantitative feeding device for the anti-icing material in the anti-icing asphalt mixture according to claim 6, characterized in that A beam frame (41) is horizontally fixed in the storage tank (4), a vibration pipe (6) is fixed at the center of the beam frame (41), and two collar sleeves (42) are slidably arranged on the vibration pipe (6). A plurality of vertically arranged material guiding rods (43) are distributed on the outer circumference of the collar sleeves (42), and the material guiding rods (43) are connected to the two collar sleeves (42) through an X-shaped connecting frame (44); A vibration transmission frame (45) is hinged on a plurality of the vane plates (51). A guide rod is hinged in the middle of the vibration transmission frame (45). The upper end of the guide rod is connected to a sliding ring (46) slidably arranged on a vibration tube (6). The sliding ring (46) is fixed to the upper ring sleeve (42) through a plurality of vertically fixed connecting rods (47).

8. The quantitative feeding device for the anti-icing material in the anti-icing asphalt mixture according to claim 7, characterized in that, An inner rod (61) is coaxially and rotatably connected in the vibration tube (6). A plurality of eccentric mass blocks (62) are distributed on the inner rod (61); A bushing (63) is slidably arranged at the position of the lower ring sleeve (42) in the vibration tube (6). The bushing (63) is fixed to the ring sleeve (42) through a plurality of radially distributed connecting shafts. A limiting spring is arranged between the bushing (63) and the vibration tube (6); A top shaft (64) is fixed on the inner rod (61). The top shaft (64) abuts against the lower end surface of the bushing (63), and its contact surface is arranged as an inclined tooth surface structure.

9. The quantitative feeding device for the anti-icing material in the anti-icing asphalt mixture according to claim 8, characterized in that, The lower end of the inner rod (61) extends into a flow control nozzle (5). A transmission sleeve (48) is rotatably sleeved on the inner rod (61). The other end of the vibration transmission frame (45) is hinged to the transmission sleeve (48).

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