Material removing mechanism for metal product die casting

Abstract

The utility model discloses a material removing mechanism for die casting of metal products, which relates to the technical field of die casting processing and comprises a base, a collecting groove formed in the middle of the upper end of the base, a discharging groove formed in the lower side of the front end of the base and communicated with the collecting groove, an opening groove formed in the left side of the upper end of the base, and a sliding groove formed in the rear side of the upper end of the base. A metal product rotating assembly is arranged on the left side of the upper end of the base, a stub bar cutting and grinding mechanism is arranged on the rear side of the upper end of the base and comprises a cutting and grinding alternating assembly, the cutting and grinding alternating assembly comprises a first electric push rod, and the output end of the first electric push rod is fixedly connected with a telescopic rod. The left side of the outer end of the telescopic rod is fixedly connected with a contact plate, and the upper end of the contact plate is fixedly connected with a first rack. According to the die casting polishing and trimming device, the die casting cutting face and the die casting outer circumferential face can be polished and trimmed at the same time, and the die casting polishing and trimming efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to die casting processing technical field, concretely is a kind of metal product die casting material removal mechanism. BACKGROUND

[0002] Die casting is a metal casting process, its characteristics are to use the cavity of mould to melt the metal and exert high pressure, most of the die casting castings are not contain iron, such as zinc, copper, aluminum, magnesium, lead, tin and lead-tin alloy and their alloys, according to the different types of die casting, need to use cold chamber die casting machine or hot chamber die casting machine, metal die casting will produce head after die casting forming;

[0003] Such as the utility model patent with the publication number CN222588066U discloses a kind of metal die casting automatic trimming material removal head device, including base, the base is provided with converging groove, the base is provided with sliding slot, first threaded rod is rotatably connected on the inner wall of sliding slot, sliding plate is slidably connected in the sliding slot, the first threaded rod is threaded through sliding plate setting, cutting assembly is provided on the sliding plate, grip is rotatably penetrated in the base, one end of the grip is fixedly connected on the first threaded rod, working groove is provided on the base, second threaded rod is rotatably connected on the inner wall of working groove.The utility model in the application can stably remove the material of die casting of different sizes, improve the practicability of device, and can automatically overturn die casting, without manually overturning die casting by staff, while facilitating user to clean device, reduce the workload of staff, improve the working efficiency of polishing and trimming, but there is the problem that the outer circumferential surface of die casting after cutting head is polished and trimmed, but the burr of die casting cutting surface is not polished and trimmed, the phenomenon that the burr of die casting cutting surface still exists, finally lead to reduce the polishing and trimming efficiency of die casting, for this, we propose a kind of metal product die casting material removal mechanism. UTILITY MODEL CONTENTS

[0004] The utility model is to provide a kind of metal product die casting material removal mechanism, to solve the problem raised in the above background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a material removal mechanism for die casting of metal products, comprising a base, a collecting groove formed in the middle of the upper end of the base, a discharging groove formed on the lower side of the front end of the base, the discharging groove communicating with the collecting groove, an opening groove formed on the left side of the upper end of the base, a sliding groove formed on the rear side of the upper end of the base, the sliding groove being disposed inside the collecting groove, a metal product rotating assembly formed on the left side of the upper end of the base, and a material head cutting and grinding mechanism formed on the rear side of the upper end of the base, the material head cutting and grinding mechanism comprising a cutting and grinding alternating assembly, the cutting and grinding alternating assembly comprising a first electric... The push rod has a telescopic rod fixedly connected to its output end. A cutter is fixedly connected to the lower end of the telescopic rod. A contact plate is fixedly connected to the left side of the outer end of the telescopic rod. A first rack is fixedly connected to the upper end of the contact plate. A gear is meshed with the left end of the first rack. A second rack is meshed with the left end of the gear. An L-shaped cutting surface grinding plate is fixedly connected to the lower end of the second rack. A spring is fixedly connected to the front end of the L-shaped cutting surface grinding plate. A circumferential surface grinding plate is fixedly connected to the front end of the spring. A guide post is fixedly connected to the rear end of the circumferential surface grinding plate. Support components are provided at each corner of the lower end of the base.

[0006] Preferably, a first stepper motor is fixedly connected to the rear right end of the base, a first rotating rod is fixedly connected to the output end of the first stepper motor, an L-shaped plate is threadedly connected to the outer end of the first rotating rod, a support plate is fixedly connected to the middle of the front end of the L-shaped plate, the upper end of the first electric push rod is fixedly connected to the L-shaped plate, and a sliding groove is slidably connected to the outer end of the L-shaped plate.

[0007] Preferably, the metal product rotating assembly includes a vertical plate, a second stepper motor is fixedly connected to the upper left side of the vertical plate, a rotating shaft is fixedly connected to the output end of the second stepper motor, a rotating cylinder is fixedly connected to the end of the rotating shaft away from the second stepper motor, a second electric push rod is fixedly connected to the upper outer side of the rotating cylinder, and a clamping arc plate is fixedly connected to the output end of the second electric push rod.

[0008] Preferably, a first pulley is fixedly connected to the middle of the outer end of the rotating shaft, a second pulley is provided below the first pulley and the second pulley is disposed in the opening groove, a belt is sleeved between the first pulley and the second pulley, a second rotating rod is fixedly connected to the surface of the second pulley, a debris cleaning plate is threadedly connected to the outer end of the second rotating rod and the second rotating rod passes through the debris cleaning plate, and a collection groove is slidably connected to the lower end of the debris cleaning plate.

[0009] Preferably, the rear end of the gear is fixedly connected to a follower shaft, and the rear end of the follower shaft is rotatably connected to an L-shaped plate via a bearing.

[0010] Preferably, the outer end of the guide post is slidably connected to an L-shaped cutting surface grinding plate, and the guide post passes through the L-shaped cutting surface grinding plate.

[0011] Preferably, the outer end of the first rotating rod is provided with a threaded groove, and the end of the first rotating rod away from the first stepper motor is rotatably connected to the base through a bearing.

[0012] Preferably, the support assembly includes support columns fixedly connected to each corner of the lower end of the base, and each support column is fixedly connected to an anti-slip pad at its lower end.

[0013] Preferably, the outer end of the second rotating rod is provided with a threaded groove, and the end of the second rotating rod away from the second pulley is rotatably connected to the base through a bearing.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. Equipped with a base, collection trough, discharge trough, opening trough, slide chute, and head cutting and grinding mechanism, the device first powers the first stepper motor via an external power source. The output of the first stepper motor drives the first rotating rod to rotate, which in turn drives the L-shaped plate to slide within the slide chute. The L-shaped plate then moves the support plate until its upper end contacts the outer end of the metal product. Next, power is supplied to the first electric push rod via an external power source. The output of the first electric push rod drives the telescopic rod downwards, which in turn drives the cutter, contact plate, and first rack downwards. The first rack then drives the gear to rotate clockwise, which in turn drives the second rack upwards. The second rack then drives the L-shaped cutting surface grinding plate, spring, guide post, and circumferential surface grinding plate upwards. After the cutter cuts off the head, power is supplied again via the first stepper motor. The output of this first stepper motor drives the first rotating rod to rotate in reverse. A rotating rod drives the L-shaped plate to move to the right within the groove. This L-shaped plate, in turn, moves the support plate to the right. During this process, the L-shaped plate also moves the circumferential grinding plate, the L-shaped cutting surface grinding plate, the spring, and the guide post to the right. Once the left end of the L-shaped cutting surface grinding plate is flush with the cut surface of the metal product, the power supply to the first stepper motor can be stopped. Then, power can be restored to the first electric push rod via an external power source. The output end of the first electric push rod then drives the telescopic rod to move upwards. The retracting rod drives the contact plate and the second rack to move upward. At this time, the first rack drives the gear to rotate, which in turn drives the second rack to move downward. The second rack drives the circumferential grinding plate, the L-shaped cutting surface grinding plate, the spring, and the guide post to move downward. When the front end of the circumferential grinding plate abuts against the outer end of the metal product, the power supply to the first electric push rod can be stopped. This utility model realizes the simultaneous grinding and trimming of the cutting surface and the outer circumferential surface of the die casting, improving the grinding and trimming efficiency of the die casting.

[0016] 2. A metal product rotating assembly is provided, which can supply power to the second stepper motor and the second electric push rod via an external power source. First, one end of the metal product is inserted into the rotating cylinder. The output end of the second electric push rod then moves the clamping arc plate downwards. Once the inner end of the clamping arc plate abuts against the outer end of the metal product, the output end of the second stepper motor drives the rotating shaft to rotate. This rotating shaft then drives the rotating cylinder, which in turn drives the metal product to rotate. During this process, the rotating shaft drives the first pulley to rotate, which in turn drives the second pulley to rotate via a belt. The second pulley then drives the second rotating rod to rotate, causing the debris cleaning plate to move within the collection trough. The debris cleaning plate cleans the debris in the collection trough, improving its cleanliness.

[0017] 3. The base and support components are provided to ensure stable support of the base during use, which is achieved through the support columns and anti-slip pads, thus improving the stability of the base. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the material head cutting and grinding mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the alternating cutting and grinding component structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the rotating component structure of the metal product of this utility model.

[0022] In the diagram: 1. Base; 2. Support assembly; 21. Support column; 22. Anti-slip pad; 3. Collection trough; 4. Discharge trough; 5. Opening trough; 6. Slide chute; 7. Material head cutting and grinding mechanism; 71. First stepper motor; 72. First rotating rod; 73. L-shaped plate; 74. Support plate; 75. Cutting and grinding alternating assembly; 751. First electric push rod; 752. Telescopic rod; 753. Cutter; 754. Contact plate; 755. First rack; 756. Gear; 7 57. Follower shaft; 758. Circumferential surface grinding plate; 759. Second rack; 7510. L-shaped cutting surface grinding plate; 7511. Spring; 7512. Guide post; 8. Metal product rotating assembly; 81. Vertical plate; 82. Second stepper motor; 83. Rotating shaft; 84. Rotating cylinder; 85. Second electric push rod; 86. Clamping arc plate; 87. First pulley; 88. Belt; 89. Second pulley; 810. Second rotating rod; 811. Debris cleaning plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a material removal mechanism for die casting of metal products, including a base 1, a collection groove 3 in the middle of the upper end of the base 1, a discharge groove 4 in the lower front end of the base 1, the discharge groove 4 communicating with the collection groove 3, an opening groove 5 in the left side of the upper end of the base 1, a sliding groove 6 in the rear side of the upper end of the base 1, the sliding groove 6 being disposed inside the collection groove 3, a metal product rotating assembly 8 in the left side of the upper end of the base 1, and a material head cutting and grinding mechanism 7 in the rear side of the upper end of the base 1, the material head cutting and grinding mechanism 7 including a cutting and grinding alternating assembly 75, the cutting and grinding alternating assembly 75 including a first electric push rod 751, the output end of the first electric push rod 751 being fixedly connected to a telescopic rod 7 52. A cutter 753 is fixedly connected to the lower end of the telescopic rod 752. A contact plate 754 is fixedly connected to the left side of the outer end of the telescopic rod 752. A first rack 755 is fixedly connected to the upper end of the contact plate 754. A gear 756 is meshed with the left end of the first rack 755. A second rack 759 is meshed with the left end of the gear 756. An L-shaped cutting surface grinding plate 7510 is fixedly connected to the lower end of the second rack 759. A spring 7511 is fixedly connected to the front end of the L-shaped cutting surface grinding plate 7510. A circumferential surface grinding plate 758 is fixedly connected to the front end of the spring 7511. A guide post 7512 is fixedly connected to the rear end of the circumferential surface grinding plate 758. Support components 2 are provided at each corner of the lower end of the base 1.

[0025] In this embodiment, a first stepper motor 71 is fixedly connected to the rear right side of the base 1. A first rotating rod 72 is fixedly connected to the output end of the first stepper motor 71. An L-shaped plate 73 is threadedly connected to the outer end of the first rotating rod 72. A support plate 74 is fixedly connected to the middle of the front end of the L-shaped plate 73. The upper end of the first electric push rod 751 is fixedly connected to the L-shaped plate 73. The outer end of the L-shaped plate 73 is slidably connected to the slide groove 6.

[0026] Specifically, the first stepper motor 71 is powered by an external power source. The output of the first stepper motor 71 drives the first rotating rod 72 to rotate, which in turn drives the L-shaped plate 73 to move. The L-shaped plate 73 then drives the support plate 74 to move.

[0027] In this embodiment, the metal product rotating assembly 8 includes a vertical plate 81. A second stepper motor 82 is fixedly connected to the upper left side of the vertical plate 81. A rotating shaft 83 is fixedly connected to the output end of the second stepper motor 82. A rotating cylinder 84 is fixedly connected to the end of the rotating shaft 83 away from the second stepper motor 82. A second electric push rod 85 is fixedly connected to the upper outer side of the rotating cylinder 84. A clamping arc plate 86 is fixedly connected to the output end of the second electric push rod 85.

[0028] Specifically, the metal product rotating assembly 8 can supply power to the second stepper motor 82 and the second electric push rod 85 via an external power source. First, one end of the metal product is inserted into the rotating cylinder 84. The output end of the second electric push rod 85 then drives the clamping arc plate 86 downwards. Once the inner end of the clamping arc plate 86 abuts against the outer end of the metal product, the output end of the second stepper motor 82 drives the rotating shaft 83 to rotate. The rotating shaft 83 then drives the rotating cylinder 84, which in turn drives the metal product to rotate. During this process, the rotating shaft 83 drives the first pulley 87 to rotate. The first pulley 87, through the belt 88, drives the second pulley 89 to rotate. The second pulley 89 then drives the second rotating rod 810 to rotate, causing the debris cleaning plate 811 to move within the collection tank 3. The debris cleaning plate 811 cleans the debris in the collection tank 3, improving its cleanliness.

[0029] In this embodiment, a first pulley 87 is fixedly connected to the middle of the outer end of the rotating shaft 83. A second pulley 89 is provided at the lower part of the first pulley 87 and is located in the opening groove 5. A belt 88 is sleeved between the first pulley 87 and the second pulley 89. A second rotating rod 810 is fixedly connected to the surface of the second pulley 89. A debris cleaning plate 811 is threadedly connected to the outer end of the second rotating rod 810 and passes through the debris cleaning plate 811. The lower end of the debris cleaning plate 811 is slidably connected to the collection groove 3.

[0030] Specifically, the first pulley 87 is driven to rotate by the rotating shaft 83. At this time, the first pulley 87 drives the second pulley 89 to rotate through the belt 88, which in turn drives the second rotating rod 810 to rotate. At this time, the rotating rod drives the debris cleaning plate 811 to slide in the collection groove 3.

[0031] In this embodiment, a follower shaft 757 is fixedly connected to the rear end of the gear 756, and the rear end of the follower shaft 757 is rotatably connected to the L-shaped plate 73 through a bearing.

[0032] Specifically, the stability of the gear 756 during rotation can be improved by using the follower shaft 757.

[0033] In this embodiment, the outer end of the guide post 7512 is slidably connected to the L-shaped cutting surface grinding plate 7510, and the guide post 7512 penetrates through the L-shaped cutting surface grinding plate 7510.

[0034] Specifically, ensure that the guide post 7512 does not interfere with the L-shaped cutting surface grinding plate 7510 during movement.

[0035] In this embodiment, the outer end of the first rotating rod 72 is provided with a threaded groove, and the end of the first rotating rod 72 away from the first stepper motor 71 is rotatably connected to the base 1 through a bearing.

[0036] Specifically, ensure that the first rotating rod 72 does not interfere with the base 1.

[0037] In this embodiment, the support component 2 includes support columns 21 fixedly connected to each corner of the lower end of the base 1, and each support column 21 is fixedly connected to an anti-slip pad 22 at its lower end.

[0038] Specifically, the base 1 and the support component 2 can provide stable support for the base 1 during use through the support column 21 and the anti-slip pad 22, thereby improving the stability of the base 1.

[0039] In this embodiment, the outer end of the second rotating rod 810 is provided with a threaded groove, and the end of the second rotating rod 810 away from the second pulley 89 is rotatably connected to the base 1 through a bearing.

[0040] Specifically, ensure that the second rotating rod 810 does not interfere with the base 1.

[0041] Working principle: Power is supplied to the second stepper motor 82 and the second electric push rod 85 via an external power source. First, one end of the metal product is inserted into the rotating cylinder 84. The output of the second electric push rod 85 then moves the clamping arc plate 86 downwards until its inner end contacts the outer end of the metal product. Next, power is supplied to the first stepper motor 71 via an external power source. The output of the first stepper motor 71 then rotates the first rotating rod 72. The first rotating rod 72 causes the L-shaped plate 73 to slide within the groove 6. The L-shaped plate 73 then moves the support plate 74 until its upper end contacts the outer end of the metal product. Finally, power is supplied to the first electric push rod 75 via an external power source. When power is supplied, the output of the first electric push rod 751 drives the telescopic rod 752 to move downward. The telescopic rod 752 then drives the cutter 753, contact plate 754, and first rack 755 to move downward. The first rack 755 drives the gear 756 to rotate clockwise. The gear 756 then drives the second rack 759 to move upward. The second rack 759 then drives the L-shaped cutting surface grinding plate 7510, spring 7511, guide post 7512, and circumferential surface grinding plate 758 to move upward. After the cutter 753 cuts off the material head, power can be supplied again through the first stepper motor 71. The output of the first stepper motor 71 then drives the first rotating rod 72 to rotate in reverse. A rotating rod 72 drives the L-shaped plate 73 to move to the right within the slide groove 6. At this time, the L-shaped plate 73 drives the support plate 74 to move to the right. During this process, the L-shaped plate 73 drives the circumferential grinding plate 758, the L-shaped cutting surface grinding plate 7510, the spring 7511, and the guide post 7512 to move to the right. When the left end of the L-shaped cutting surface grinding plate 7510 is on the same plane as the metal product's cutting surface, the power supply to the first stepper motor 71 can be stopped. Next, power can be supplied to the first electric push rod 751 again via an external power source. The output end of the first electric push rod 751 drives the telescopic rod 752 to move upwards. The telescopic rod 752 then drives the contact plate 754 and the second rack 759 to move upwards. The rack 755 drives the gear 756 to rotate, which in turn drives the second rack 759 to move downwards. At this time, the second rack 759 drives the circumferential grinding plate 758, the L-shaped cutting surface grinding plate 7510, the spring 7511, and the guide post 7512 to move downwards. When the front end of the circumferential grinding plate 758 abuts against the outer end of the metal product, the power supply to the first electric push rod 751 is stopped. Next, the output end of the second stepper motor 82 drives the rotating shaft 83 to rotate. At this time, the rotating shaft 83 drives the rotating cylinder 84, which in turn drives the metal product to rotate. During this process, the rotating shaft 83 drives the first pulley 87 to rotate. The first pulley 87 drives the second pulley 89 to rotate via the belt 88.At this time, the second pulley 89 drives the second rotating rod 810 to rotate, causing the debris cleaning plate 811 to move within the collection tank 3. The debris cleaning plate 811 cleans the debris within the collection tank 3, improving its cleanliness. This invention enables simultaneous grinding and trimming of the cut surface and outer circumferential surface of the die-casting part, thus improving the grinding and trimming efficiency.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A material removal mechanism for die casting of metal products, comprising a base (1), characterized in that: A collection groove (3) is provided in the middle of the upper end of the base (1), and a discharge groove (4) is provided on the lower side of the front end of the base (1). The discharge groove (4) is connected to the collection groove (3). An opening groove (5) is provided on the left side of the upper end of the base (1). A sliding groove (6) is provided on the rear side of the upper end of the base (1). The sliding groove (6) is located inside the collection groove (3). A metal product rotating assembly (8) is provided on the left side of the upper end of the base (1). A material head cutting and grinding mechanism (7) is provided on the rear side of the upper end of the base (1). The material head cutting and grinding mechanism (7) includes a cutting and grinding alternating assembly (75). The cutting and grinding alternating assembly (75) includes a first electric push rod (751). A telescopic rod (752) is fixedly connected to the output end of the first electric push rod (751). The telescopic rod (752) is lower... A cutter (753) is fixedly connected to the end of the telescopic rod (752). A contact plate (754) is fixedly connected to the left side of the outer end of the telescopic rod (752). A first rack (755) is fixedly connected to the upper end of the contact plate (754). A gear (756) is meshed with the left end of the first rack (755). A second rack (759) is meshed with the left end of the gear (756). An L-shaped cutting surface grinding plate (7510) is fixedly connected to the lower end of the second rack (759). A spring (7511) is fixedly connected to the front end of the L-shaped cutting surface grinding plate (7510). A circumferential surface grinding plate (758) is fixedly connected to the front end of the spring (7511). A guide post (7512) is fixedly connected to the rear end of the circumferential surface grinding plate (758). A support component (2) is provided at each corner of the lower end of the base (1).

2. The material removal mechanism for die casting of metal products according to claim 1, characterized in that: The base (1) is fixedly connected to the rear right side of the first stepper motor (71), the output end of the first stepper motor (71) is fixedly connected to the first rotating rod (72), the outer end of the first rotating rod (72) is threadedly connected to the L-shaped plate (73), the front middle of the L-shaped plate (73) is fixedly connected to the support plate (74), the upper end of the first electric push rod (751) is fixedly connected to the L-shaped plate (73), and the outer end of the L-shaped plate (73) is slidably connected to the slide groove (6).

3. The material removal mechanism for die casting of metal products according to claim 1, characterized in that: The metal product rotating assembly (8) includes a vertical plate (81), a second stepper motor (82) is fixedly connected to the upper left side of the vertical plate (81), a rotating shaft (83) is fixedly connected to the output end of the second stepper motor (82), a rotating cylinder (84) is fixedly connected to the end of the rotating shaft (83) away from the second stepper motor (82), a second electric push rod (85) is fixedly connected to the upper outer side of the rotating cylinder (84), and a clamping arc plate (86) is fixedly connected to the output end of the second electric push rod (85).

4. The material removal mechanism for die casting of metal products according to claim 3, characterized in that: The first pulley (87) is fixedly connected to the middle of the outer end of the rotating shaft (83). A second pulley (89) is provided at the lower part of the first pulley (87) and the second pulley (89) is located in the opening groove (5). A belt (88) is sleeved between the first pulley (87) and the second pulley (89). A second rotating rod (810) is fixedly connected to the surface of the second pulley (89). A debris cleaning plate (811) is threadedly connected to the outer end of the second rotating rod (810) and the second rotating rod (810) passes through the debris cleaning plate (811). The lower end of the debris cleaning plate (811) is slidably connected to the collection groove (3).

5. The material removal mechanism for die casting of metal products according to claim 1, characterized in that: The rear end of the gear (756) is fixedly connected to a follower shaft (757), and the rear end of the follower shaft (757) is rotatably connected to an L-shaped plate (73) via a bearing.

6. The material removal mechanism for die casting of metal products according to claim 1, characterized in that: The outer end of the guide post (7512) is slidably connected to the L-shaped cutting surface grinding plate (7510), and the guide post (7512) passes through the L-shaped cutting surface grinding plate (7510).

7. The material removal mechanism for die casting of metal products according to claim 2, characterized in that: The first rotating rod (72) has a threaded groove at its outer end, and the end of the first rotating rod (72) away from the first stepper motor (71) is rotatably connected to the base (1) through a bearing.

8. The material removal mechanism for die casting of metal products according to claim 1, characterized in that: The support assembly (2) includes support columns (21) fixedly connected to each corner of the lower end of the base (1), and each support column (21) is fixedly connected to an anti-slip pad (22).

9. The material removal mechanism for die casting of metal products according to claim 4, characterized in that: The second rotating rod (810) has a threaded groove at its outer end, and the end of the second rotating rod (810) away from the second pulley (89) is rotatably connected to the base (1) through a bearing.

Images