A central control electric caster

Abstract

The present invention discloses a central control electric caster, comprising: a central control wheel body, the central control wheel body comprising two wheel bodies, a bracket, a drive unit and a control module, the drive unit and the control module are installed in the bracket, and the wheel bodies are respectively installed on both sides of the bracket so that the wheel bodies are connected to the drive unit, and a slope recognition module is installed in the bracket at the same time, the slope recognition module and the drive unit are respectively electrically connected to the control module, so that when the cart with the central control electric caster is driving, the slope recognition module in the central control wheel body recognizes the road ahead, and when encountering a slope with a certain angle, the slope recognition module recognizes the slope and sends a signal to the control module, and then the control module sends an instruction to the drive unit, and the drive unit drives the wheel body to rotate to provide power to the wheel body, so that the operator who pushes the cart can easily push the cart onto the slope, saving the operator's operating effort, improving operability, and being very convenient and labor-saving.

Description

Technical Field

[0001] The present invention relates to the technical field of central control wheels, and more particularly to a central control electric caster. Background Art

[0002] Traditional caster types can be divided into swivel casters, fixed-type casters, swivel casters with brakes, and center-control casters. The structure of a swivel caster allows 360-degree rotation; the fixed-type caster has no rotating structure and cannot turn; usually the two types of casters are used in combination, for example, the structure of a trolley is two fixed wheels in the front and two swivel wheels in the back near the push handle. The structure of a swivel caster with brakes allows 360-degree rotation and can be started and stopped by brake control. The structure of a center-control caster relies on the hexagonal hole on the rotating center control rod to brake. Traditional casters are further subdivided into super-heavy casters, extra-heavy casters, special-shaped casters, brake casters, shock-absorbing casters, adjustable casters, small and light casters, light casters, medium casters, heavy casters, etc.

[0003] However, the traditional casters can only be moved forward manually and cannot be electrically controlled. This requires the pusher to increase strength when negotiating a slope with a certain angle, which reduces maneuverability and is very laborious. Therefore, it is necessary to propose a central control electric caster to at least partially solve the problems existing in the existing technology. Summary of the Invention

[0004] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] In order to at least partially solve the above problems, the present invention provides a central control electric caster, including: a central control wheel body, the central control wheel body including two wheel bodies, a bracket, a drive unit and a control module, the drive unit and the control module are arranged in the bracket, the wheel bodies are provided with two and are located on both sides of the bracket, the wheel bodies are connected to the drive unit, a slope recognition module is provided in the bracket, and the slope recognition module and the drive unit are electrically connected to the control module respectively.

[0006] According to the central control electric caster of an embodiment of the present invention, the bracket includes a caster support, the driving unit is arranged in the caster support, the driving unit includes a motor and two couplings, the motor is arranged horizontally in the caster support, the motor is provided with two output shafts, the output shafts are connected to the wheel body through the coupling, the motor is electrically connected to the control module, and the wheel body is arranged on the side of the caster support.

[0007] According to the central control electric caster of the embodiment of the present invention, the driving part further includes a transverse bearing, the transverse bearing is arranged in the caster support, and the coupling is passed through the transverse bearing.

[0008] According to the central control electric caster of the embodiment of the present invention, a connecting shaft is provided on the inner side of the wheel body, the connecting shaft is connected to the output shaft through the coupling, and a dust cover is provided on the outer side of the wheel body.

[0009] According to the central control electric caster of an embodiment of the present invention, two slope recognition modules are provided, and a first recognition hole and a second recognition hole are respectively provided on the caster support. The two slope recognition modules are respectively arranged in the first recognition hole and the second recognition hole, and the slope recognition module is set to be one of a laser radar and a camera.

[0010] According to the central control electric caster of an embodiment of the present invention, a support tube is provided at the rear end of the bracket, and a support adjustment part is provided in the support tube. The support adjustment part includes a directional brake part, a vertical gear shaft and a cam. The directional brake part is arranged in the directional groove inside the bracket, and a gear shaft spring is provided on the vertical gear shaft, and is arranged in the support tube through a fixing part. The fixing part is arranged at the upper end of the support tube, and the lower end of the vertical gear shaft extends into the directional brake part and is connected with the directional brake part. The cam is arranged in the upper end of the fixing part and is used to drive the vertical gear shaft.

[0011] According to the central control electric caster of an embodiment of the present invention, the support adjustment part also includes a longitudinal connecting shaft, a first bearing, and a second bearing. A step hole is provided in the support cylinder, the longitudinal connecting shaft is provided in the step hole, the vertical gear shaft is passed through the longitudinal connecting shaft, the longitudinal connecting shaft has a step ring, and the step ring is provided in the step hole through the first bearing. The second bearing is sleeved on the longitudinal connecting shaft and is located below the step ring.

[0012] According to the central control electric caster of an embodiment of the present invention, a buffer peripheral groove is provided in the support tube, the buffer peripheral groove is located on the periphery of the step hole, and a buffer spring is provided in the buffer peripheral groove, the fixing piece is inserted into the buffer peripheral groove to press against the buffer spring, and a screw sleeve is provided on the fixing piece, and the screw sleeve is screwed to the upper end of the support tube.

[0013] According to the central control electric caster of an embodiment of the present invention, the fixing part includes a bearing cover, a top shaft plate, a left shaft sleeve, a retaining spring, and a right shaft sleeve. The bearing cover is sleeved on the vertical gear shaft and corresponds to the buffer peripheral groove. The left shaft sleeve and the right shaft sleeve are arranged at the upper end of the bearing cover. The top shaft plate is arranged between the left shaft sleeve and the right shaft sleeve through the retaining spring. The cam is arranged inside the left shaft sleeve and the right shaft sleeve.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] The present invention provides a central control electric caster, which includes: a central control wheel body, where the central control wheel body includes two wheel bodies, a bracket, a drive unit and a control module, where the drive unit and the control module are installed in the bracket, and two wheel bodies are provided, and the wheel bodies are respectively installed on both sides of the bracket so that the wheel bodies are connected to the drive unit, and a slope recognition module is installed in the bracket at the same time, where the slope recognition module and the drive unit are respectively electrically connected to the control module, so that when the cart with the central control electric caster is driving, the slope recognition module in the central control wheel body recognizes the road ahead, and when encountering a slope with a certain angle, the slope recognition module recognizes the slope and sends a signal to the control module, and then the control module sends an instruction to the drive unit, and the drive unit drives the wheel body to rotate to provide power to the wheel body, so that the operator who pushes the cart can easily push the cart onto the slope, saving the operator's operating effort, improving operability, and being very convenient and labor-saving.

[0016] The central control electric caster described in the present invention, other advantages, objectives and features of the present invention will be partially reflected in the following description, and will also be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

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

[0019] Figure 2 It is a structural diagram of the control module in the present invention.

[0020] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the support and adjustment part in the present invention.

[0022] Figure 5 It is a partial structural diagram of the driving part in the present invention.

[0023] Figure 6 Schematic diagram of the structure of the bracket in the present invention.

[0024] Figure 7 It is a structural schematic diagram of the bearing gland in the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0026] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0027] like Figure 1-Figure 7 As shown, the present invention provides a central control electric caster, including: a central control wheel body 100, the central control wheel body 100 includes two wheel bodies 1, a bracket 2, a drive unit 3 and a control module 4, the drive unit 3 and the control module 4 are arranged in the bracket 2, the wheel body 1 is provided with two, and is located on both sides of the bracket 2, the wheel body 1 is connected to the drive unit 3, and a slope recognition module 5 is provided in the bracket 2, and the slope recognition module 5 and the drive unit 3 are electrically connected to the control module 4 respectively.

[0028] The working principle and beneficial effects of the above technical solution: The present invention provides a central control electric caster, which includes: a central control wheel body 100, where the central control wheel body 100 includes two wheel bodies 1, a bracket 2, a driving unit 3 and a control module 4, the driving unit 3 and the control module 4 are installed in the bracket 2, and two wheel bodies 1 are provided. The wheel bodies 1 are respectively installed on both sides of the bracket 2 so that the wheel bodies 1 are connected to the driving unit 3. At the same time, a slope recognition module 5 is installed in the bracket 2, where the slope recognition module 5 and the driving unit 3 are respectively electrically connected to the control module 4. Therefore, when the cart with the central control electric caster is moving, the slope recognition module 5 in the central control wheel body 100 recognizes the road ahead. When encountering a slope with a certain angle, the slope recognition module 5 recognizes the slope and sends a signal to the control module 4. Then the control module 4 sends an instruction to the drive unit 3, and the drive unit 3 drives the wheel body 1 to rotate, thereby providing power to the wheel body 1, so that the operator who pushes the cart can easily push the cart onto the slope, saving the operator's operating effort, improving operability, and being very convenient and labor-saving.

[0029] In one embodiment, the bracket 2 includes a caster support 21, the driving unit 3 is arranged in the caster support 21, the driving unit 3 includes a motor 31 and two couplings 32, the motor 31 is arranged horizontally in the caster support 21, the motor 31 is provided with two output shafts 311, the output shaft 311 is connected to the wheel body 1 through the coupling 32, the motor 31 is electrically connected to the control module 4, and the wheel body 1 is arranged on the side of the caster support 21.

[0030] The working principle and beneficial effects of the above technical solution: The specific structure of the bracket 2 is provided in this embodiment, and the bracket 2 of this structure includes a caster support 21. Here, the caster support 21 is used as a supporting component for the entire central control electric caster. Here, the driving unit 3 is installed in the caster support 21, and the caster support 21 provides a supporting space for the driving unit 3. The driving unit 3 includes a motor 31 and two couplings 32. Since two wheel bodies 1 are designed, the motor 31 is installed horizontally in the caster support 21. The motor 31 has two output shafts 311, and the output shaft 311 is connected to the wheel body 1 through the coupling 32. Therefore, when the control module 4 starts the motor 31, the output shaft 311 of the motor 31 drives the wheel body 1 to rotate, providing power for the wheel body 1, so that the operator can easily push the cart through the slope.

[0031] In one embodiment, the driving portion 3 further includes a transverse bearing 33 , the transverse bearing 33 is disposed in the caster support 21 , and the coupling 32 is disposed in the transverse bearing 33 .

[0032] The working principle and beneficial effects of the above technical solution: In this embodiment, the driving part 3 also includes a transverse bearing 33, where the transverse bearing 33 is installed in the caster support 21, and the coupling 32 is passed through the transverse bearing 33, so when the output shaft 311 of the motor 31 drives the wheel body 1 to rotate through the coupling 32, the coupling 32 rotates in the transverse bearing 33. The transverse bearing 33 makes the rotation of the coupling 32 more stable, and avoids friction between the coupling 32 and the caster support 21 to hinder the output of the motor 31, thereby improving the working efficiency of the motor 31.

[0033] In one embodiment, a connecting shaft 11 is provided on the inner side of the wheel body 1 , and the connecting shaft 11 is connected to the output shaft 311 through the coupling 32 . A dust cover 12 is provided on the outer side of the wheel body 1 .

[0034] The working principle and beneficial effects of the above technical solution: This embodiment provides a specific structure of the wheel body 1, where a connecting shaft 11 is installed on the inner side of the wheel body 1 of the structure, and the connecting shaft 11 is connected to the output shaft 311 through a coupling 32, and the connection between the coupling 32 and the wheel body 1 is realized through the connecting shaft 11; at the same time, a dust cover 12 is installed on the outer side of the wheel body 1, and the dust cover 12 not only plays a dust-proof role, but also can increase the aesthetics.

[0035] In one embodiment, two slope recognition modules 5 are provided, and a first recognition hole 211 and a second recognition hole 212 are respectively provided on the caster support 21. The two slope recognition modules 5 are respectively arranged in the first recognition hole 211 and the second recognition hole 212. The slope recognition module 5 is set to be one of a laser radar and a camera.

[0036] The working principle and beneficial effects of the above technical solution: In this embodiment, two slope recognition modules 5 are provided. A first recognition hole 211 and a second recognition hole 212 are respectively formed on the caster support 21. The first recognition hole 211 and the second recognition hole 212 face opposite directions. The two slope recognition modules 5 are installed in the first recognition hole 211 and the second recognition hole 212, respectively. The slope recognition modules 5 can be designed as a laser radar or a camera. In this way, the two slope recognition modules 5 can identify the slope before and after the push, reducing the difficulty for the operator to change the push direction.

[0037] In one embodiment, a support tube 22 is provided at the rear end of the bracket 2, and a support adjustment part 6 is provided in the support tube 22. The support adjustment part 6 includes a directional brake part 601, a vertical gear shaft 602 and a cam 603. The directional brake part 601 is arranged in the directional groove 604 inside the bracket 2, and a gear shaft spring 605 is provided on the vertical gear shaft 602, and is arranged in the support tube 22 through a fixing member 7. The fixing member 7 is arranged at the upper end of the support tube 22, and the lower end of the vertical gear shaft 602 extends into the directional brake part 601 and is connected with the directional brake part 601. The cam 603 is arranged in the upper end of the fixing member 7 and is used to drive the vertical gear shaft 602.

[0038] The working principle and beneficial effects of the above technical solution: The specific structure of the bracket 2 is provided in this embodiment. The rear end of the bracket 2 of the structure has a support tube 22, and a support adjustment part 6 is installed in the support tube 22. The support adjustment part 6 includes a directional brake part 601, a vertical gear shaft 602 and a cam 603. Specifically, the directional brake part 601 is installed in the directional groove 604 inside the bracket 2, and the vertical gear shaft 602 is installed with a gear shaft spring 605 and is installed in the support tube 22 through a fixing part 7. The fixing part 7 is installed at the upper end of the support tube 22, and the vertical gear shaft The lower end of 602 extends into the directional brake part 601 and is connected to the directional brake part 601. The cam 603 is installed in the upper end of the fixing member 7. Therefore, when the operator adjusts the cam 603 through the pedal (not shown) of the cart, the cam 603 drives the vertical gear shaft 602, so that the vertical gear shaft 602 adjusts the directional brake part 601, and the directional brake part 601 fixes the vertical gear shaft 602, thus preventing the vertical gear shaft 602 from rotating. At this time, the central control wheel body 100 is positioned and can only move in a directional straight line. Among them, the gear shaft spring 605 can provide support for the vertical gear shaft 602, facilitating the movement of the vertical gear shaft 602.

[0039] In one embodiment, the support adjustment part 6 also includes a longitudinal connecting shaft 606, a first bearing 607, and a second bearing 608. A step hole 221 is provided in the support cylinder 22, and the longitudinal connecting shaft 606 is provided in the step hole 221. The vertical gear shaft 602 is passed through the longitudinal connecting shaft 606. The longitudinal connecting shaft 606 has a step ring 609, and the step ring 609 is provided in the step hole 221 through the first bearing 607. The second bearing 608 is sleeved on the longitudinal connecting shaft 606 and is located below the step ring 609.

[0040] The working principle and beneficial effects of the above technical solution: In this embodiment, a longitudinal connecting shaft 606, a first bearing 607, a second bearing 608 and other structures are also provided in the support adjustment part 6. Here, a step hole 221 is opened in the support cylinder 22, and the longitudinal connecting shaft 606 is installed in the step hole 221, and the vertical gear shaft 602 is passed through the longitudinal connecting shaft 606. The longitudinal connecting shaft 606 has a step ring 609, and the step ring 609 is installed in the step hole 221 through the first bearing 607, and the second bearing 608 is sleeved on the longitudinal connecting shaft 606 and is located below the step ring 609. Here, the longitudinal connecting shaft 606 provides an installation space for the vertical gear shaft 602, and the first bearing 607 and the second bearing 608 facilitate the rotation of the entire central control wheel body 100, so as to facilitate the universal rotation of the central control wheel body 100.

[0041] In one embodiment, a buffer peripheral groove 222 is provided in the support tube 22, and the buffer peripheral groove 222 is located on the periphery of the step hole 221, and a buffer spring 223 is provided in the buffer peripheral groove 222, and the fixing member 7 is inserted into the buffer peripheral groove 222 to press against the buffer spring 223, and a screw sleeve 700 is provided on the fixing member 7, and the screw sleeve 700 is screwed to the upper end of the support tube 22.

[0042] The working principle and beneficial effects of the above technical solution: In this embodiment, a buffer peripheral groove 222 is opened in the support tube 22, and the buffer peripheral groove 222 is located on the periphery of the step hole 221, and a buffer spring 223 is installed in the buffer peripheral groove 222, and the fixing part 7 is inserted into the buffer peripheral groove 222 to resist the buffer spring 223, and a screw sleeve 700 is installed on the fixing part 7, and the screw sleeve 700 is screwed to the upper end of the support tube 22. Here, the fixing part 7 fixes the support adjustment part 6, and supports the fixing part 7 through the buffer spring 223, which plays a buffering role in the bracket 2, so that the central control wheel body 100 has a shock-proof effect.

[0043] In one embodiment, the fixing member 7 includes a bearing cover 701, a top shaft plate 702, a left shaft sleeve 703, a retaining spring 704, and a right shaft sleeve 705. The bearing cover 701 is sleeved on the vertical gear shaft 602 and corresponds to the buffer peripheral groove 222. The left shaft sleeve 703 and the right shaft sleeve 705 are arranged at the upper end of the bearing cover 701. The top shaft plate 702 is arranged between the left shaft sleeve 703 and the right shaft sleeve 705 through the retaining spring 704. The cam 603 is arranged inside the left shaft sleeve 703 and the right shaft sleeve 705.

[0044] The working principle and beneficial effects of the above technical solution: The specific structure of the fixing part 7 is provided in this embodiment, and the fixing part 7 of this structure includes a bearing cover 701, a top shaft plate 702, a left shaft sleeve 703, a retaining spring 704, and a right shaft sleeve 705. Here, the bearing cover 701 is sleeved on the vertical gear shaft 602 and corresponds to the buffer peripheral groove 222, and the left shaft sleeve 703 and the right shaft sleeve 705 are installed at the upper end of the bearing cover 701, and the top shaft plate 702 is installed between the left shaft sleeve 703 and the right shaft sleeve 705 through the retaining spring 704, and the cam 603 is installed inside the left shaft sleeve 703 and the right shaft sleeve 705. Here, the vertical gear shaft 602 is installed in the support tube 22 through the bearing cover 701, and the top shaft plate 702, the left shaft sleeve 703, the retaining spring 704, and the right shaft sleeve 705 provide installation space for the cam 603.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0047] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A central control electric caster, characterized in that: include: A central control wheel body (100), the central control wheel body (100) comprising two wheel bodies (1), a bracket (2), a driving unit (3) and a control module (4), the driving unit (3) and the control module (4) being arranged in the bracket (2), two wheel bodies (1) being provided and being located on both sides of the bracket (2), the wheel body (1) being connected to the driving unit (3), a slope recognition module (5) being arranged in the bracket (2), the slope recognition module (5) and the driving unit (3) being electrically connected to the control module (4) respectively; A support tube (22) is provided at the rear end of the bracket (2), a step hole (221) is provided in the support tube (22), a buffer peripheral groove (222) is provided in the support tube (22), the buffer peripheral groove (222) is located on the periphery of the step hole (221), and a buffer spring (223) is provided in the buffer peripheral groove (222), a fixing member (7) is inserted into the buffer peripheral groove (222) to press against the buffer spring (223), and a screw sleeve (700) is provided on the fixing member (7), and the screw sleeve (700) is screwed to the upper end of the support tube (22).

2. The central control electric caster according to claim 1, characterized in that: The bracket (2) includes a caster support (21), the driving unit (3) is arranged in the caster support (21), the driving unit (3) includes a motor (31) and two couplings (32), the motor (31) is arranged transversely in the caster support (21), the motor (31) is provided with two output shafts (311), the output shafts (311) are connected to the wheel body (1) through the couplings (32), the motor (31) is electrically connected to the control module (4), and the wheel body (1) is arranged on the side of the caster support (21).

3. The central control electric caster according to claim 2, characterized in that: The driving part (3) further includes a transverse bearing (33), the transverse bearing (33) is arranged in the caster support (21), and the coupling (32) is passed through the transverse bearing (33).

4. The central control electric caster according to claim 2, characterized in that: A connecting shaft (11) is provided on the inner side of the wheel body (1), and the connecting shaft (11) is connected to the output shaft (311) via the coupling (32). A dust cover (12) is provided on the outer side of the wheel body (1).

5. The central control electric caster according to claim 2, characterized in that: Two slope recognition modules (5) are provided, and a first recognition hole (211) and a second recognition hole (212) are respectively provided on the caster support (21). The two slope recognition modules (5) are respectively provided in the first recognition hole (211) and the second recognition hole (212). The slope recognition module (5) is configured as one of a laser radar and a camera.

6. The central control electric caster according to claim 2, characterized in that: A support adjustment portion (6) is provided in the support tube (22), and the support adjustment portion (6) includes a directional brake portion (601), a vertical gear shaft (602) and a cam (603). The directional brake portion (601) is provided in a directional groove (604) inside the bracket (2). A gear shaft spring (605) is provided on the vertical gear shaft (602) and is provided in the support tube (22) through a fixing member (7). The fixing member (7) is provided at the upper end of the support tube (22). The lower end of the vertical gear shaft (602) extends into the directional brake portion (601) and is connected to the directional brake portion (601). The cam (603) is provided in the upper end of the fixing member (7) and is used to drive the vertical gear shaft (602).

7. The central control electric caster according to claim 6, characterized in that: The support adjustment portion (6) further includes a longitudinal connecting shaft (606), a first bearing (607), and a second bearing (608), wherein the longitudinal connecting shaft (606) is arranged in the step hole (221), and the vertical gear shaft (602) is passed through the longitudinal connecting shaft (606), and the longitudinal connecting shaft (606) has a step ring (609), and the step ring (609) is arranged in the step hole (221) through the first bearing (607), and the second bearing (608) is sleeved on the longitudinal connecting shaft (606) and is located below the step ring (609).

8. The central control electric caster according to claim 7, characterized in that: The fixing member (7) includes a bearing cover (701), a top shaft plate (702), a left shaft sleeve (703), a retaining spring (704), and a right shaft sleeve (705). The bearing cover (701) is sleeved on the vertical gear shaft (602) and corresponds to the buffer peripheral groove (222). The left shaft sleeve (703) and the right shaft sleeve (705) are arranged at the upper end of the bearing cover (701). The top shaft plate (702) is arranged between the left shaft sleeve (703) and the right shaft sleeve (705) through the retaining spring (704). The cam (603) is arranged inside the left shaft sleeve (703) and the right shaft sleeve (705).

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