Feeding device of injection mold

Abstract

The invention relates to the technical field of injection molding feeding, and discloses a feeding device of an injection mold, which comprises a centralized material distribution device, a material tank, a cover plate covering the top of the material tank, and a material outlet of the material tank is communicated with the centralized material distribution device, and the centralized material distribution device is provided with a particle pump, and the discharging end of the particle pump is communicated with the centralized material distribution device. A material suction structure is arranged at the feeding end of the particle pump; the material suction structure comprises a first connecting pipe, a flexible pipe and a second connecting pipe, one end of the first connecting pipe communicates with the feeding end of the particle pump, the first connecting pipe communicates with the second connecting pipe through the flexible pipe, the end, away from the flexible pipe, of the second connecting pipe extends into the material tank, an avoiding opening is formed in the middle of the cover plate, and the end, away from the avoiding opening, of the second connecting pipe extends into the material tank. The flexible pipe penetrates through the receding opening. Movement of the sliding barrel is controlled through the air cylinder, so that the particle pump can suck particle raw materials remaining at the bottom of the material tank, the raw materials can be fully utilized, waste is reduced, and the production efficiency and the cost benefit are improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding feeding, in particular to a feeding device for an injection mold. Background Art

[0002] With the rapid development of modern manufacturing industry, injection molding technology has occupied an important position in the production of plastic products due to its advantages such as high efficiency, high precision and strong adaptability. The performance of injection mold, as the core equipment of injection molding technology, directly affects the quality and production efficiency of the product. The feeding device, as an important part of the injection mold, is responsible for providing accurate, stable and continuous raw materials into the mold. Its technical level directly affects the overall performance of the injection mold.

[0003] In the prior art, feeding is generally achieved by sucking plastic particles through a particle pump, that is, the staff inserts a suction tube into the granular raw material and uses the suction force of the particle pump to automatically suck the material. However, in actual operation, the suction tube cannot smoothly suck the granular raw material remaining at the bottom of the material tank. Since the suction tube cannot smoothly suck the granular raw material remaining at the bottom of the material tank, the staff needs to spend extra time and energy to clean the material tank, which leads to low feeding efficiency.

[0004] Therefore, it is necessary to design a feeding device for the injection mold to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a feeding device for an injection mold.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A feeding device for an injection mold, comprising a centralized material distribution device, a particle pump is installed on the centralized material distribution device, a material discharge end of the particle pump is connected to the centralized material distribution device, and a material tank, a cover plate is covered on the top of the material tank, and a material suction structure is provided at the material feed end of the particle pump;

[0008] The material suction structure includes a connecting pipe 1, a flexible pipe and a connecting pipe 2, one end of the connecting pipe 1 is connected to the feed end of the particle pump, the connecting pipe 1 and the connecting pipe 2 are connected through a flexible pipe, the connecting pipe 2 extends away from one end of the flexible pipe to the inside of the material tank, and a avoidance opening is opened in the middle of the cover plate, and the flexible pipe passes through the avoidance opening;

[0009] The end of the second connecting pipe away from the flexible pipe is provided with a sliding structure and a driving structure.

[0010] As a preferred technical solution of the present invention, the sliding structure includes a sleeve, a fixed ring, a spring and a sliding cylinder. The sleeve is fixedly mounted on one end of the connecting pipe located inside the material tank, the fixed ring is fixed on the inner surface of the sleeve, the sliding cylinder is slidably arranged in the sleeve, one end of the spring is connected to the fixed ring, and the other end is connected to the sliding cylinder.

[0011] As a preferred technical solution of the present invention, the driving structure includes a cylinder, two openings, two connecting plates and two baffles. The cylinder is installed on connecting pipe 2. The two openings are both opened on the sleeve. The two connecting plates are both fixed on the sliding cylinder, and the two connecting plates are respectively slidably arranged in the two openings. The telescopic end of the cylinder is fixedly connected to one of the connecting plates, and the two baffles are respectively fixedly sleeved on the two connecting plates.

[0012] As a preferred technical solution of the present invention, the cross section of the baffle is a semi-annular structure, and the side surface of the baffle is in contact with the outer surface of the sleeve.

[0013] As a preferred technical solution of the present invention, a vibration structure is provided on the material tank, and the vibration structure includes a motor and an eccentric wheel. The motor is installed on the material tank, and the eccentric wheel is fixed on the output shaft of the motor, and the eccentric wheel is arranged opposite to the connecting pipe 2.

[0014] As a preferred technical solution of the present invention, a stirring structure is provided inside the material tank, and a transmission structure is provided on the material tank, the stirring structure includes two rotating shafts, a plurality of stirring blades, two gears, a rack, a reciprocating screw, a limit rod and a moving block, the two rotating shafts both pass through the bottom surface of the material tank, and the two rotating shafts are rotatably connected to the material tank, the plurality of stirring blades are respectively fixed on the two rotating shafts, the two gears are respectively fixedly sleeved on one end of the two rotating shafts located outside the material tank, the reciprocating screw is rotatably installed on the base of the material tank, the limit rod is fixed on the base of the material tank, the moving block is threadedly sleeved on the reciprocating screw, and the moving block is slidably sleeved on the limit rod, the rack is fixed on the side of the moving block, and the two gears are meshed with the rack.

[0015] As a preferred technical solution of the present invention, the transmission structure includes a transmission rod, a bracket, a shaft rod, two bevel gears and a transmission member, the transmission rod is fixed to one end of the reciprocating screw, and the transmission rod is rotatably mounted on the base of the material tank, the bracket is fixed on the material tank, and the shaft rod is rotatably mounted on the bracket, one of the bevel gears is fixedly sleeved on the output shaft of the motor, and the other bevel gear is fixedly sleeved on the shaft rod, and the transmission rod and the shaft rod are connected through a transmission member.

[0016] As a preferred technical solution of the present invention, a mounting opening is provided on the bracket, and the output shaft of the motor passes through the mounting opening.

[0017] The present invention has the following beneficial effects:

[0018] 1. The movement of the sliding cylinder is controlled by the air cylinder, so that the particle pump can absorb the particle raw materials remaining at the bottom of the material tank, which can make full use of the raw materials, reduce waste, and improve production efficiency and cost-effectiveness. In the traditional method, the residual raw materials need to be manually cleaned, which will increase the downtime of the production line. This device can automatically clean the residual raw materials, reduce downtime, and improve the stability and continuity of the production line. Due to the automatic cleaning of residual raw materials, the need for manual cleaning is reduced, saving labor costs, and by making full use of raw materials, raw material waste is reduced, reducing production costs;

[0019] 2. The semi-annular structure of the baffle and the fitting design with the outer surface of the sleeve effectively prevent the granular raw materials from entering the opening of the connecting plate, which can avoid the granular raw materials from blocking the opening of the connecting plate, ensure the smooth operation of the connecting plate during movement, improve the stability and reliability of the system, and reduce the equipment maintenance work caused by the blockage of granular raw materials. The design of the baffle effectively prevents the granular raw materials from entering the opening of the connecting plate, reduces the complexity and frequency of maintenance, simplifies the maintenance process of the equipment, and improves the efficiency and convenience of maintenance;

[0020] 3. Through the rotation of the eccentric wheel, the connecting pipe 2 continuously collides and produces a vibration effect, which can loosen the granular raw materials accumulated in the material tank, thereby improving the fluidity and uniformity of the granular raw materials, making them easier to be absorbed by the connecting pipe, thereby increasing the absorption efficiency. The vibration effect helps prevent the granular raw materials from accumulating and sticking inside the connecting pipe, reducing the risk of blockage, thus keeping the feeding system unobstructed, avoiding production interruptions or equipment damage caused by blockage of granular raw materials, and improving the stability and reliability of the system;

[0021] 4. The granular raw materials in the material tank are stirred by the compound movement of the reciprocating screw, moving block, rack and stirring blade, which enables the granular raw materials to flow continuously and avoids the dense arrangement between the particles, which helps to enhance the fluidity of the particles and reduce the friction between the particles, thereby improving the suction efficiency of the particle pump. Since the friction between the particles is the main limiting factor of the suction speed, the stirring action of the stirring blade effectively reduces the friction between the particles, so that the particle pump is no longer restricted by the friction between the particles when sucking the granular raw materials, optimizing the feeding speed and improving the feeding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a feeding device for an injection mold proposed by the present invention;

[0023] Figure 2 for Figure 1 A magnified view of the local structure;

[0024] Figure 3 for Figure 2 A magnified view of the structure at A;

[0025] Figure 4 for Figure 2 Enlarged view of the structure at B.

[0026] In the figure: 1 centralized material distribution device, 2 particle pump, 3 material tank, 4 cover plate, 51 connecting pipe 1, 52 flexible pipe, 53 connecting pipe 2, 61 sleeve, 62 fixing ring, 63 spring, 64 sliding cylinder, 71 cylinder, 72 opening, 73 connecting plate, 74 baffle, 81 motor, 82 eccentric wheel, 91 rotating shaft, 92 stirring blade, 93 gear, 94 rack, 95 reciprocating screw, 96 limit rod, 97 moving block, 101 transmission rod, 102 bracket, 103 shaft rod, 104 bevel gear, 105 transmission part. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Reference Figure 1-4 A feeding device for an injection mold comprises a centralized material distribution device 1, a particle pump 2 is installed on the centralized material distribution device 1, a discharge end of the particle pump 2 is connected to the centralized material distribution device 1, and also comprises a material tank 3, a cover plate 4 is covered on the top of the material tank 3, and a suction structure is provided at the feed end of the particle pump 2;

[0029] The material suction structure includes a connecting pipe 1 51, a flexible pipe 52 and a connecting pipe 2 53. One end of the connecting pipe 1 51 is connected to the feeding end of the particle pump 2. The connecting pipe 1 51 and the connecting pipe 2 53 are connected through the flexible pipe 52. The connecting pipe 2 53 extends to the inside of the material tank 3 away from one end of the flexible pipe 52. A avoidance port is opened in the middle of the cover plate 4. The flexible pipe 52 passes through the avoidance port. The particle pump 2 absorbs the particle raw material inside the material tank 3 through the connecting pipe 1 51, the flexible pipe 52 and the connecting pipe 2 53.

[0030] The end of the connecting pipe 53 away from the flexible pipe 52 is provided with a sliding structure and a driving structure. The sliding structure includes a sleeve 61, a fixing ring 62, a spring 63 and a sliding cylinder 64. The sleeve 61 is fixedly sleeved on the end of the connecting pipe 53 located inside the material tank 3. The fixing ring 62 is fixed on the inner surface of the sleeve 61. The sliding cylinder 64 is slidably arranged in the sleeve 61. One end of the spring 63 is connected to the fixing ring 62, and the other end is connected to the sliding cylinder 64. The driving structure includes a cylinder 71, two openings 72, two connecting plates 73 and two baffles 74. The cylinder 71 is installed on the connecting pipe 53. The two openings 72 are both opened on the sleeve 61. The two connecting plates 73 are both fixed on the sliding cylinder 64, and the two connecting plates 73 are respectively slidably arranged in the two openings 72. The telescopic end of the cylinder 71 is fixedly connected to one of the connecting plates 73, and the material is sucked in. When the cylinder 71 is in operation, some particles will remain at the inner bottom of the material tank 3. At this time, the staff starts the cylinder 71. When the cylinder 71 is in operation, it can drive the corresponding connecting plate 73 to move downward, which makes the sliding cylinder 64 move downward until the bottom end of the sliding cylinder 64 fits with the inner bottom of the material tank 3. At this time, the particle pump 2 can suck the particle raw material remaining at the bottom of the material tank 3 through the sliding cylinder 64 to avoid the residual raw material, and no manual cleaning is required. The two baffles 74 are fixedly sleeved on the two connecting plates 73 respectively. The cross-section of the baffle 74 is a semi-annular structure, and the side surface of the baffle 74 fits with the outer surface of the sleeve 61. During the movement of the connecting plate 73, the baffle 74 can always fit with the outer surface of the sleeve 61. This design can prevent the particle raw material from entering the two openings 72 and prevent the particle raw material from blocking the opening 72, thereby ensuring the smooth movement of the two connecting plates 73;

[0031] The material tank 3 is provided with a vibration structure, which includes a motor 81 and an eccentric wheel 82. The motor 81 is installed on the material tank 3, and the eccentric wheel 82 is fixed on the output shaft of the motor 81, and the eccentric wheel 82 is arranged opposite to the second connecting pipe 53. When the motor 81 is running, it can drive the eccentric wheel 82 to rotate. During the rotation process, the eccentric wheel 82 can continuously collide with the second connecting pipe 53, so that the second connecting pipe 53 produces a vibration effect. When the second connecting pipe 53 vibrates, the granular raw materials accumulated in the material tank 3 can be loosened, so that the second connecting pipe 53 can absorb the granular raw materials. In addition, the first connecting pipe 51 and the second connecting pipe 53 are both made of hard pipes, and the first connecting pipe 51 and the second connecting pipe 53 are connected by a flexible pipe 52 made of flexible material. The design of the flexible pipe 52 enables the second connecting pipe 53 to have a vibration effect;

[0032] The material tank 3 is provided with a stirring structure inside, and a transmission structure is provided on the material tank 3. The stirring structure includes two rotating shafts 91, a plurality of stirring blades 92, two gears 93, a rack 94, a reciprocating screw rod 95, a limiting rod 96 and a moving block 97. The two rotating shafts 91 pass through the bottom surface of the material tank 3, and the two rotating shafts 91 are rotatably connected with the material tank 3. The plurality of stirring blades 92 are respectively fixed on the two rotating shafts 91, and the two gears 93 are respectively fixedly sleeved on one end of the two rotating shafts 91 located outside the material tank 3. The reciprocating screw rod 95 is rotatably installed on the base of the material tank 3, and the limiting rod 96 is fixed. The movable block 97 is fixed on the base of the material tank 3, and the movable block 97 is threadedly sleeved on the reciprocating screw rod 95, and the movable block 97 is slidably sleeved on the limit rod 96, and the rack 94 is fixed on the side of the movable block 97, and the two gears 93 are meshed with the rack 94. The plurality of stirring blades 92 can stir the granular raw materials in the material tank 3 during the rotation process, so that the granular raw materials flow continuously, because due to the dense arrangement between the plastic particles, the particle pump needs to overcome the friction between the particles when sucking the particles, which limits the suction speed. This design can effectively avoid this situation;

[0033] The transmission structure includes a transmission rod 101, a bracket 102, a shaft rod 103, two bevel gears 104 and a transmission member 105. The transmission rod 101 is fixed to one end of the reciprocating screw rod 95, and the transmission rod 101 is rotatably mounted on the base of the material tank 3. The bracket 102 is fixed to the material tank 3. A mounting port is provided on the bracket 102, and the output shaft of the motor 81 passes through the mounting port. The shaft rod 103 is rotatably mounted on the bracket 102. One of the bevel gears 104 is fixedly sleeved on the output shaft of the motor 81, and the other is fixedly sleeved on the output shaft of the motor 81. An outer bevel gear 104 is fixedly sleeved on the shaft 103, and the transmission rod 101 and the shaft 103 are connected by a transmission member 105. When the motor 81 is running, it can also drive the shaft 103 to rotate through two mutually meshing bevel gears 104. When the shaft 103 rotates, the transmission rod 101 can be driven to rotate through the transmission member 104, which makes the reciprocating screw 95 rotate accordingly. Under the limiting action of the limiting rod 96, the reciprocating screw 95 can drive the moving block 97 to reciprocate when it rotates.

[0034] The specific working principle of the present invention is as follows:

[0035] When the feeding device of the injection mold proposed by the present invention is actually used, the particle pump 2 sucks the granular raw material inside the material tank 3 through the connecting tube 1 51, the flexible tube 52 and the connecting tube 2 53. In the initial state, under the elastic force of the spring 63, the sliding cylinder 64 is located inside the sleeve 61. At this time, there is a gap between the sliding cylinder 64 and the bottom of the material tank 3. The granular raw material can be sucked through the gap between the bottom end of the sleeve 61 and the bottom of the material tank 3. As the suction work proceeds, some particles will remain at the inner bottom of the material tank 3. At this time, the staff starts the cylinder 71. When the cylinder 71 is running, it can drive the corresponding connecting plate 73 to move downward, which makes the sliding cylinder 64 move downward until the bottom end of the sliding cylinder 64 fits with the inner bottom of the material tank 3. At this time, the particle pump 2 can suck the granular raw material remaining at the bottom of the material tank 3 through the sliding cylinder 64, avoiding raw material residue, and no manual cleaning is required;

[0036] It should be noted that, during the movement of the sliding cylinder 64, the two connecting plates 73 and the two openings 72 guide the movement of the sliding cylinder 64. Baffles 74 are fixed to the two connecting plates 73. The cross section of the baffles 74 is a semi-annular structure, and the side of the baffles 74 fits with the outer surface of the sleeve 61. During the movement of the connecting plates 73, the baffles 74 can always fit with the outer surface of the sleeve 61. This design can prevent the granular raw materials from entering the two openings 72 and prevent the granular raw materials from blocking the openings 72, thereby ensuring the smooth movement of the two connecting plates 73.

[0037] During the material suction process, the staff starts the motor 81. When the motor 81 is running, it can drive the eccentric wheel 82 to rotate. During the rotation process, the eccentric wheel 82 can continuously collide with the connecting pipe 2 53, so that the connecting pipe 2 53 produces a vibration effect. When the connecting pipe 2 53 vibrates, the granular raw materials accumulated in the material tank 3 can be loosened, which is convenient for the connecting pipe 2 53 to absorb the granular raw materials. In addition, the connecting pipe 1 51 and the connecting pipe 2 53 are both made of hard pipes, and the connecting pipe 1 51 and the connecting pipe 2 53 are connected by a flexible pipe 52 made of flexible material. The design of the flexible pipe 52 enables the connecting pipe 2 53 to have a vibration effect;

[0038] When the motor 81 is running, it can also drive the shaft 103 to rotate through two mutually meshing bevel gears 104. When the shaft 103 rotates, it can drive the transmission rod 101 to rotate through the transmission member 104, which makes the reciprocating screw 95 rotate accordingly. Under the limiting action of the limiting rod 96, the reciprocating screw 95 can drive the moving block 97 to move back and forth when it rotates. When the moving block 97 moves, it can drive the rack 94 to move back and forth. When the rack 94 moves, it can drive the two gears 93 to rotate, which makes the two rotating shafts 91 drive the plurality of stirring blades 92 to rotate. During the rotation process, the plurality of stirring blades 92 can stir the granular raw materials in the material tank 3, so that the granular raw materials continue to flow. Because the plastic particles are densely arranged, the particle pump needs to overcome the friction between the particles when sucking the particles, which limits the suction speed. This design This situation can be effectively avoided. It should be noted that the transmission member 105 adopts a chain drive transmission method. Specifically, the transmission member 105 may include two synchronous wheels and a synchronous belt. The synchronous belt is mounted on the two synchronous wheels to achieve transmission between the two synchronous wheels. It should be understood that the transmission member 105 adopts synchronous wheels and synchronous belts for transmission is not the only implementation method. In some other embodiments, the transmission member 105 can also adopt sprockets and chains for transmission. The transmission method of the sprocket and the chain is similar to the transmission method of the synchronous wheel and the synchronous belt, which will not be described here. The present invention does not elaborate on the transmission method of the transmission member 105 one by one. Without departing from the basic concept of the present invention, the transmission method of the transmission member 105 can be flexibly changed, which should be regarded as within the protection scope defined by the present invention. In addition, the transmission wrap angle of the transmission member 105 is greater than 120°.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A feeding device for an injection mold, comprising a centralized material distribution device (1), a particle pump (2) being installed on the centralized material distribution device (1), and a discharge end of the particle pump (2) being connected to the centralized material distribution device (1). It is characterized in that It also comprises a material tank (3), the top of which is covered with a cover plate (4), and the feed end of the particle pump (2) is provided with a material suction structure; The material suction structure comprises a connecting pipe 1 (51), a flexible pipe (52) and a connecting pipe 2 (53); one end of the connecting pipe 1 (51) is connected to the feed end of the particle pump (2); the connecting pipe 1 (51) and the connecting pipe 2 (53) are connected via the flexible pipe (52); one end of the connecting pipe 2 (53) away from the flexible pipe (52) extends to the inside of the material tank (3); a relief opening is provided in the middle of the cover plate (4), and the flexible pipe (52) passes through the relief opening; The end of the second connecting tube (53) away from the flexible tube (52) is provided with a sliding structure and a driving structure.

2. A feeding device for an injection mold according to claim 1, It is characterized in that The sliding structure comprises a sleeve (61), a fixing ring (62), a spring (63) and a sliding cylinder (64); the sleeve (61) is fixedly sleeved on one end of the connecting pipe (53) located inside the material tank (3); the fixing ring (62) is fixed on the inner surface of the sleeve (61); the sliding cylinder (64) is slidably arranged in the sleeve (61); one end of the spring (63) is connected to the fixing ring (62), and the other end is connected to the sliding cylinder (64).

3. A feeding device for an injection mold according to claim 1, It is characterized in that The driving structure comprises a cylinder (71), two openings (72), two connecting plates (73) and two baffles (74); the cylinder (71) is mounted on the second connecting pipe (53); the two openings (72) are both opened on the sleeve (61); the two connecting plates (73) are both fixed on the sliding cylinder (64); and the two connecting plates (73) are respectively slidably arranged in the two openings (72); the telescopic end of the cylinder (71) is fixedly connected to one of the connecting plates (73); and the two baffles (74) are respectively fixedly sleeved on the two connecting plates (73).

4. A feeding device for an injection mold according to claim 3, It is characterized in that The cross section of the baffle (74) is a semi-annular structure, and the side surface of the baffle (74) is in contact with the outer surface of the sleeve (61).

5. A feeding device for an injection mold according to claim 1, It is characterized in that The material tank (3) is provided with a vibration structure, the vibration structure comprising a motor (81) and an eccentric wheel (82), the motor (81) is mounted on the material tank (3), the eccentric wheel (82) is fixed on the output shaft of the motor (81), and the eccentric wheel (82) is arranged opposite to the second connecting pipe (53).

6. A feeding device for an injection mold according to claim 1, It is characterized in that The material tank (3) is provided with a stirring structure inside, and the material tank (3) is provided with a transmission structure, wherein the stirring structure comprises two rotating shafts (91), a plurality of stirring blades (92), two gears (93), a rack (94), a reciprocating screw rod (95), a limiting rod (96) and a moving block (97), the two rotating shafts (91) both pass through the bottom surface of the material tank (3), and the two rotating shafts (91) are rotatably connected to the material tank (3), the plurality of stirring blades (92) are respectively fixed on the two rotating shafts (91), and the two rotating shafts (95) are respectively connected to the two rotating shafts (91). The gears (93) are respectively fixedly sleeved on one end of the two rotating shafts (91) located outside the material tank (3); the reciprocating screw rod (95) is rotatably mounted on the base of the material tank (3); the limiting rod (96) is fixed on the base of the material tank (3); the moving block (97) is threadedly sleeved on the reciprocating screw rod (95), and the moving block (97) is slidably sleeved on the limiting rod (96); the rack (94) is fixed on the side of the moving block (97), and the two gears (93) are meshed with the rack (94).

7. A feeding device for an injection mold according to claim 6, It is characterized in that The transmission structure comprises a transmission rod (101), a bracket (102), a shaft rod (103), two bevel gears (104) and a transmission member (105); the transmission rod (101) is fixed to one end of the reciprocating screw rod (95), and the transmission rod (101) is rotatably mounted on the base of the material tank (3); the bracket (102) is fixed on the material tank (3); the shaft rod (103) is rotatably mounted on the bracket (102); one of the bevel gears (104) is fixedly sleeved on the output shaft of the motor (81), and the other bevel gear (104) is fixedly sleeved on the shaft rod (103); the transmission rod (101) and the shaft rod (103) are transmission-connected via the transmission member (105).

8. A feeding device for an injection mold according to claim 7, It is characterized in that The bracket (102) is provided with a mounting opening, and the output shaft of the motor (81) passes through the mounting opening.

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