Mounting bracket, braking device and motor sweeper
By designing and installing a bracket to integrate the electronic pump assembly and pedal, the problems of misjudging parking timing and large space occupation in the electro-hydraulic braking system under complex road conditions were solved, thereby improving the safety and space utilization efficiency of the sweeper.
Patent Information
- Application Number
- CN202520155291.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Electro-hydraulic braking systems are prone to misjudging parking timing in complex road conditions or inclement weather, and existing braking devices occupy a large space, affecting safety.
Design a mounting bracket including a first mounting plate and a second mounting plate for integrating an electric pump assembly and a pedal, connected by a hinge shaft to achieve integrated installation of the electric pump assembly and the pedal, and enhance connection reliability by combining automatic and manual parking functions.
It achieves space saving and safety improvement in braking device, and has automatic parking and manual parking functions, thus improving the driving safety of sweeper trucks.
Smart Images

Figure CN223631536U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a sweeper technology field especially relates to a mounting support, brake device and sweeper. BACKGROUND
[0002] Electronic hydraulic brake system is mainly composed of electronic control unit and electronic pump unit. Vehicle running state and environmental parameters are obtained by a plurality of sensors, and the electronic control unit judges parking opportunity according to the obtained information.
[0003] Electronic hydraulic brake system in actual application, in complex road conditions or in bad weather, will cause the information obtained by its sensor to be wrong, and further appear parking opportunity misjudgment, cause traffic safety problem.
[0004] When introducing artificial brake function, two sets of brake devices occupy a larger space of vehicle.
[0005] Therefore, an installation support, brake device and sweeper are needed to solve the above technical problems. UTILITY MODEL CONTENTS
[0006] The utility model aims at providing an installation support, brake device and sweeper, which can integrate the brake device, reduce the occupied space of the brake device, and also enable the sweeper to have automatic parking and manual parking functions, and improve driving safety.
[0007] To achieve this purpose, the utility model adopts the following technical solutions:
[0008] The mounting support comprises:
[0009] The first mounting plate is provided with a first connecting lug on one side in a first direction, the first connecting lug is used for connecting a pedal through a first hinged shaft, the other side of the first mounting plate is used for mounting an electronic pump assembly, the first mounting plate is provided with an avoiding opening, a shift fork of the electronic pump assembly can pass through the avoiding opening and be hinged with the pedal through a second hinged shaft, and the first hinged shaft and the second hinged shaft are parallel;
[0010] The second mounting plate is located on one side of the first mounting plate in a second direction, the second mounting plate is provided in an L shape with the first mounting plate and is fixed, and the first mounting plate and the second mounting plate are used for being fixed with a vehicle frame.
[0011] The first direction is perpendicular to the second direction.
[0012] As a preferred technical scheme of the mounting bracket, the first mounting plate comprises a first end face and a first flange, the avoiding opening is formed in the first end face, the first flange is connected to the edge of the first end face in the third direction, the first connecting lug is connected to the first end face and the first flange, and the first direction, the second direction and the third direction are perpendicular to each other.
[0013] As a preferred technical scheme of the mounting bracket, the first mounting plate further comprises a second flange, the second flange is connected to the edge of the first end face in the second direction, and the second flange is used to be fixed with the frame through fasteners.
[0014] As a preferred technical scheme of the mounting bracket, the first end face is provided with a plurality of first mounting holes around the axis of the avoiding opening, and the first mounting holes are used to mount the electronic pump assembly.
[0015] As a preferred technical scheme of the mounting bracket, the second mounting plate comprises a second end face and a third flange, the third flange is connected to the edge of the second end face in the third direction, and the first flange on one side wall in the second direction can be close to the third flange on one side wall in the first direction.
[0016] As a preferred technical scheme of the mounting bracket, two first connecting lugs are arranged in the second direction, and the pedal is mounted between the two first connecting lugs.
[0017] A brake device is also provided, which is mounted on the mounting bracket, and comprises the pedal and the electronic pump assembly. The electronic pump assembly comprises a cylinder, a plunger, a yoke, an electronic driving element and a clutch assembly. The cylinder is fixed to the first mounting plate, the electronic driving element is mounted in the cylinder and can adjust the pressure in the cylinder, one end of the yoke is hingedly connected to the plunger ball, the plunger can slide in the cylinder, and the peripheral wall of the plunger and the inner peripheral wall of the cylinder form a continuous seal, the other end of the yoke is hingedly connected to the pedal, and the fluid in the cylinder is used to adjust the working state of the clutch assembly.
[0018] As a preferred technical scheme of the brake device, the pedal comprises a first rod part, a second rod part and a sleeve, the first rod part is in a U shape, one end of the first rod part is a treading end, the other end is fixed with the second rod part through the sleeve, the first hinge shaft is inserted in the sleeve, and the second hinge shaft is inserted in the second rod part.
[0019] As a preferred technical scheme of the brake device, a first lubricating element is arranged between the first hinge shaft and the sleeve, and / or a second lubricating element is arranged between the second hinge shaft and the second rod part.
[0020] The cleaning vehicle also comprises the frame and the brake device.
[0021] The utility model discloses beneficial effects:
[0022] The utility model provides a mounting support, including first mounting panel and second mounting panel, wherein, first mounting panel is provided with first connecting lug on one side in first direction, and first connecting lug is used to connect pedal through first hinged shaft, and the other side of first mounting panel is used to install electronic pump assembly, and first mounting panel is provided with avoiding mouth, and the shift fork of electronic pump assembly can pass through avoiding mouth and be hinged with pedal through second hinged shaft, and first hinged shaft and second hinged shaft are parallel, second mounting panel is located one side of first mounting panel in second direction, and is fixed with first mounting panel and is arranged L type, and first mounting panel and second mounting panel are used to be fixed with frame, and first direction is perpendicular with second direction.
[0023] Specifically, the first mounting plate and the second mounting plate are fixed in an L shape, one end of the first mounting plate in the second direction and one end of the second mounting plate in the first direction are fixed, and the other end of the first mounting plate in the second direction and the other end of the second mounting plate in the first direction are respectively used for connecting and fixing with the frame. The first mounting plate is provided with a first connecting lug on one side in the first direction, the first connecting lug is used for being hinged with the pedal through a first hinged shaft, the first mounting plate is provided with an avoiding mouth, and the side of the first mounting plate opposite to the pedal is used for mounting an electronic pump assembly. The shift fork of the electronic pump assembly is hinged with the pedal through a second hinged shaft by passing through the avoiding mouth. When a user steps on the pedal, the pedal can rotate around the first hinged shaft, the pedal acts on the shift fork, and then activates the electronic pump assembly. In this way, the mounting support provided by the present application is used for integrating the electronic pump assembly and the pedal, saves installation space, and has strong connection reliability with the frame.
[0024] The utility model also provides a brake device mounted on the mounting support, and a cleaning vehicle loaded with the brake device. In this way, the cleaning vehicle has automatic braking function and manual braking function, and improves the safety of driving. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the utility model. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the embodiments of the utility model and these drawings by those skilled in the art without creating labor.
[0026] Figure 1 It is the structure schematic view of the mounting support provided by the embodiments of the utility model;
[0027] Figure 2 is an assembly schematic view of the mounting bracket and the first hinge shaft provided by the embodiment of the utility model;
[0028] Figure 3 is a structure schematic view of the pedal provided by the embodiment of the utility model;
[0029] Figure 4 is an assembly schematic view of the mounting bracket and the pedal provided by the embodiment of the utility model;
[0030] Figure 5 is an assembly schematic view of the brake device and the mounting bracket provided by the embodiment of the utility model.
[0031] In the drawings:
[0032] X, first direction; Y, second direction; Z, third direction;
[0033] 100, mounting bracket; 110, first mounting plate; 111, first connecting lug; 112, first end face; 1121, avoiding opening; 1122, first mounting hole; 113, first flange; 114, second flange; 1141, first connecting hole; 120, second mounting plate; 121, second end face; 122, third flange; 123, fourth flange; 1231, second connecting hole;
[0034] 210, first hinge shaft; 220, second hinge shaft; 230, first lubricating member;
[0035] 300, pedal; 310, first rod part; 320, second rod part; 330, sleeve pipe; 340, treading part; 400, electronic pump assembly; 410, shift fork; 420, cylinder body; 430, electronic driving member. DETAILED DESCRIPTION
[0036] The utility model will be further explained in detail in connection with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.
[0037] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0038] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature therebetween. Moreover, the first feature "on", "above" and "over" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0039] In the description of the present application, the terms "up", "down", "right", "left", "horizontal", "vertical", "top", "bottom", "front", "back", "position", "orientation" and the like are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.
[0040] As shown in Figure 1 and Figure 2 The present application provides a mounting bracket 100, comprising a first mounting plate 110 and a second mounting plate 120. Wherein, the first mounting plate 110 is provided with a first connecting lug 111 on one side of the first direction X, the first connecting lug 111 is used for connecting the pedal 300 through the first hinge shaft 210, the other side of the first mounting plate 110 is used for mounting the electronic pump assembly 400, the first mounting plate 110 is provided with a avoiding opening 1121, the shift fork 410 of the electronic pump assembly 400 can pass through the avoiding opening 1121 and be hinged with the pedal 300 through the second hinge shaft 220, the first hinge shaft 210 and the second hinge shaft 220 are parallel; the second mounting plate 120 is located on the side of the first mounting plate 110 in the second direction Y, and is arranged and fixed in L shape with the first mounting plate 110, the first mounting plate 110 and the second mounting plate 120 are used for being fixed with the frame; the first direction X is perpendicular to the second direction Y.
[0041] Specifically, the first mounting plate 110 and the second mounting plate 120 are fixed in an L shape, one end of the first mounting plate 110 in the second direction Y and one end of the second mounting plate 120 in the first direction X are fixed, and the other end of the first mounting plate 110 in the second direction Y and the other end of the second mounting plate 120 in the first direction X are respectively used for connection and fixation with the frame. The first mounting plate 110 is provided with a first connecting lug 111 on one side in the first direction X, the first connecting lug 111 is used for being hinged with the pedal 300 through the first hinge shaft 210, the first mounting plate 110 is provided with a avoiding opening 1121, and the side of the first mounting plate 110 opposite to the pedal 300 is used for mounting the electronic pump assembly 400. The tumb 410 of the electronic pump assembly 400 passes through the avoiding opening 1121 and is hinged with the pedal 300 through the second hinge shaft 220. When the user steps on the pedal 300, the pedal 300 can rotate around the first hinge shaft 210, the pedal 300 acts on the tumb 410, and then activates the electronic pump assembly 400. In this way, the application provides a mounting bracket 100 for integrated installation of the electronic pump assembly 400 and the pedal 300, which saves installation space and has strong connection reliability with the frame.
[0042] Illustratively, the first mounting plate 110 and the second mounting plate 120 are welded and fixed.
[0043] Illustratively, the first direction X is the thickness direction of the first mounting plate 110, and the second direction Y is the length direction of the first mounting plate 110.
[0044] Preferably, the axis of the avoiding opening 1121 is parallel to the first direction X.
[0045] Illustratively, the avoiding opening 1121 is provided on one side of the first connecting lug 111 in the third direction Z, and when the user steps on the pedal 300 downward, the pedal 300 can retreat into the avoiding opening 1121 against the tumb 410.
[0046] Optionally, the first mounting plate 110 includes a first end face 112 and a first flange 113, the avoiding opening 1121 is formed in the first end face 112, the first flange 113 is connected to the edge of the first end face 112 in the third direction Z, and the first connecting lug 111 connects the first end face 112 and the first flange 113; the first direction X, the second direction Y and the third direction Z are perpendicular to each other.
[0047] Illustratively, the first connecting lug 111 is provided with a plug-in slot, and in the assembly process, the plug-in slot is plugged and fixed with the first flange 113, so that the connection area of the first connecting lug 111 and the first mounting plate 110 can be increased, and the connection reliability of the two can be improved.
[0048] Further, the first end face 112 and the first flange 113 are connected in a circular arc shape.
[0049] Optionally, the first mounting plate 110 further comprises a second flange 114 connected to the edge of the first end surface 112 in the second direction Y, and the second flange 114 is used to be fixed with the frame through fasteners.
[0050] In the projection in the second direction Y, the projection area of the second flange 114 is greater than that of the first end surface 112, so that the contact area between the first mounting plate 110 and the frame is increased through the second flange 114, and the reliability and stability of the connection between the two can be improved.
[0051] Illustratively, the second flange 114 is provided with a first connecting hole 1141, and the fasteners are connected and fixed with the frame through the first connecting hole 1141.
[0052] Optionally, the first end surface 112 is provided with a plurality of first mounting holes 1122 around the axis of the avoiding hole 1121, and the first mounting holes 1122 are used to mount the electronic pump assembly 400. The first end surface 112 and the cylinder body 420 of the electronic pump assembly 400 are connected through a plurality of fasteners, and the plurality of fasteners are assembled one by one with the plurality of first mounting holes 1122 to form a flange structure, which can improve the reliability of the connection between the two.
[0053] Optionally, the second mounting plate 120 comprises a second end surface 121 and a third flange 122 connected to the edge of the second end surface 121 in the third direction Z, and the side wall of the first flange 113 in the second direction Y can be tightly attached to the side wall of the third flange 122 in the first direction X.
[0054] Illustratively, the first flange 113 and the third flange 122 are welded and fixed, and when the user steps on the pedal 300, the force received by the first connecting lug 111 is transmitted to the first flange 113 and the third flange 122, and the third flange 122 shares part of the force for the first flange 113, reducing the deformation amount of the first flange 113 and the first end surface 112.
[0055] Further, the second mounting plate 120 further comprises a fourth flange 123 connected to the side of the second end surface 121 in the first direction X, which is used to be fixed with the frame.
[0056] Illustratively, the fourth flange 123 is provided with a second connecting hole 1231, and the fasteners are fixed with the frame through the second connecting hole 1231.
[0057] Optionally, two first connecting lugs 111 are provided in the second direction Y, and the pedal 300 is installed between the two first connecting lugs 111.
[0058] In this way, a limiting groove is formed between the two first connecting positions, and the pedal 300 is inserted into the limiting groove, which can limit the movement of the pedal 300 relative to the mounting bracket 100 in the second direction Y.
[0059] As shown in Figures 3 to 5 The brake device is installed on the mounting bracket 100, and comprises a pedal 300, an electronic pump assembly 400 and a clutch assembly. The electronic pump assembly 400 comprises a cylinder 420, a plunger, a yoke 410 and an electronic driving element 430. The cylinder 420 is fixed to the first mounting plate 110, and the electronic driving element 430 is installed on the cylinder 420 and can adjust the pressure in the cylinder 420. One end of the yoke 410 is hingedly connected to the plunger ball, and the plunger can slide in the cylinder 420 and the peripheral wall of the plunger forms a continuous seal with the inner peripheral wall of the cylinder 420. The other end of the yoke 410 is hingedly connected to the pedal 300, and the fluid in the cylinder 420 is used to adjust the working state of the clutch assembly.
[0060] In this way, the brake device comprises an automatic parking and a manual parking function. When the electronic driving element 430 receives a parking signal, the electronic driving element 430 can increase the pressure in the cylinder 420, so that the fluid in the cylinder 420 flows to the clutch assembly, so that the clutch assembly clamps the brake disc and prevents the wheel from rotating. In some special cases, such as when the electronic driving element 430 and / or the sensor sending instructions to it fails, the user can manually step on the pedal 300, and the pedal 300 presses the plunger through the yoke 410, so that the plunger moves to the rodless cavity side, so that the fluid in the rodless cavity flows to the clutch assembly, so that the clutch assembly clamps the brake disc and prevents the wheel from rotating.
[0061] It should be noted that the automatic parking system and the manual parking system based on the EHB are prior art, and the specific working principle and mechanical structure are not described here.
[0062] Optionally, the pedal 300 comprises a first rod portion 310, a second rod portion 320 and a sleeve 330. The first rod portion 310 is in a U shape, one end of the first rod portion 310 is a stepping end, and the other end is fixed with the second rod portion 320 through the sleeve 330. The first hinge shaft 210 is inserted into the sleeve 330, and the second hinge shaft 220 is inserted into the second rod portion 320.
[0063] In this way, the first rod portion 310 can change the force direction of the user. When the user steps on the stepping end, the first rod portion 310 can rotate relative to the mounting bracket around the first hinge shaft 210. The first rod portion 310 drives the second rod portion 320 to rotate around the first hinge shaft 210 through the sleeve 330, and the second rod portion 320 can pull the yoke 410 through the second hinge shaft 220, and then drive the plunger to slide in the cylinder 420, increase the pressure in the cylinder 420, and make the oil flow out of the cylinder 420.
[0064] Preferably, the first rod portion 310, the sleeve and the second rod portion 320 are welded and fixed.
[0065] Optionally, the first articulation shaft 210 and the sleeve 330 are provided with a first lubricating member 230, and / or the second articulation shaft 220 and the second rod portion 320 are provided with a second lubricating member.
[0066] Illustratively, the first lubricating member 230 and / or the second lubricating member is a bushing, which can reduce the friction between the first articulation shaft 210 and the sleeve 330, and / or reduce the friction between the second articulation shaft 220 and the second rod portion 320.
[0067] Optionally, the end of the fork 410 opposite to the plunger is provided with a U-shaped slot, the second rod portion 320 is inserted into the U-shaped slot, and the second articulation shaft 220 penetrates through the opposite two side walls of the U-shaped slot and the second rod portion 320.
[0068] Illustratively, the end of the fork 410 opposite to the plunger is provided with two symmetrically arranged second connecting ears, the two connecting ears form a U-shaped slot, the two second connecting ears are symmetrically provided with first insertion holes, the second rod portion 320 is inserted into the U-shaped slot, and the second rod portion 320 is provided with second insertion holes, and the second articulation shaft 220 penetrates through the first insertion holes, the second insertion holes and the other first insertion holes in sequence. In this way, the two second connecting ears can limit the movement of the second rod portion 320 in the axial direction of the second articulation shaft 220, thereby maintaining the reliability of the connection between the pedal 300 and the fork 410.
[0069] Preferably, the second articulation shaft 220 is a shaft pin.
[0070] Optionally, the pedal 300 further comprises a treading portion 340, which is fixedly installed on the treading end and used for increasing the force receiving area.
[0071] Illustratively, the treading portion 340 is in the form of a plate, which is used for providing a force applying surface for the user. In this way, when the user treads the pedal 300, the sole of the user's foot acts on the treading portion 340, and the larger contact surface can facilitate the user to apply force to the pedal 300, and can also reduce the pressure on the sole, thereby improving the comfort of the user.
[0072] Further provided is a sweeper comprising a vehicle frame and the above-mentioned brake device, and the mounting bracket 100 is fixed to the vehicle frame. In this way, the sweeper has automatic braking function and manual braking function, thereby improving the safety of driving.
[0073] In addition, the above is only the preferred embodiment of the present application and the applied technical principle. The person skilled in the art can understand that the present application is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by the person skilled in the art without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims
1. Mounting bracket, characterized in that The utility model relates to a pedal assembly, including: First mounting plate (110), first mounting plate (110) one side in first direction (X) is provided with first connecting lug (111), first connecting lug (111) is used to connect pedal (300) through first hinged shaft (210), the other side of first mounting plate (110) is used for installing electronic pump assembly (400), first mounting plate (110) is provided with avoiding mouth (1121), the shift fork (410) of electronic pump assembly (410) can pass through avoiding mouth (1121) and be hinged with pedal (300) through second hinged shaft (220), first hinged shaft (210) and second hinged shaft (220) are parallel; Second mounting plate (120) is located first mounting plate (110) one side in second direction (Y), second mounting plate (120) is provided with L type with first mounting plate (110) and is fixed, first mounting plate (110) and second mounting plate (120) are used for being fixed with frame; First direction (X) and second direction (Y) are perpendicular.
2. The mounting bracket of claim 1, wherein First mounting plate (110) includes first end surface (112) and first flange (113), avoiding mouth (1121) is formed in first end surface (112), first flange (113) is connected in the edge of first end surface (112) in third direction (Z), first connecting lug (111) connects first end surface (112) and first flange (113); First direction (X), second direction (Y) and third direction (Z) are perpendicular two by two.
3. The mounting bracket of claim 2, wherein First mounting plate (110) further includes second flange (114), second flange (114) is connected in the edge of first end surface (112) in second direction (Y), and second flange (114) is used for being fixed with frame through fastener.
4. The mounting bracket of claim 2, wherein First end surface (112) is provided with a plurality of first mounting holes (1122) around the axis of avoiding mouth (1121), and the first mounting hole (1122) is used for mounting the electronic pump assembly (400).
5. The mounting bracket of claim 2, wherein Second mounting plate (120) includes second end surface (121) and third flange (122), third flange (122) is connected in the edge of second end surface (121) in third direction (Z), and the side wall of first flange (113) in second direction (Y) can be close to the side wall of third flange (122) in first direction (X).
6. The mounting bracket of claim 2, wherein First connecting lug (111) is provided with two in second direction (Y), and pedal (300) is installed between two first connecting lug (111).
7. A brake device mounted to the mounting bracket (100) according to any one of claims 1 to 6, characterized in that, The brake device comprises the pedal (300) and the electronic pump assembly (400), the electronic pump assembly (400) comprises a cylinder (420), a plunger, a yoke (410), an electronic drive (430) and a clutch assembly, the cylinder (420) is fixed to the first mounting plate (110), the electronic drive (430) is installed on the cylinder (420) and can adjust the pressure in the cylinder (420), one end of the yoke (410) is hingedly connected with the plunger ball, the plunger can slide in the cylinder (420), and the peripheral wall of the plunger is in continuous sealing with the inner peripheral wall of the cylinder (420), the other end of the yoke (410) is hingedly connected with the pedal (300), and the fluid in the cylinder (420) is used to adjust the working state of the clutch assembly.
8. The brake device according to claim 7, characterized in that The pedal (300) comprises a first rod portion (310), a second rod portion (320) and a sleeve (330), the first rod portion (310) is U-shaped, one end of the first rod portion (310) is a treading end, the other end is fixed with the second rod portion (320) through the sleeve (330), the first hinge shaft (210) is inserted into the sleeve (330), and the second hinge shaft (220) is inserted into the second rod portion (320).
9. The brake device according to claim 8, characterized in that A first lubricating member (230) is arranged between the first hinge shaft (210) and the sleeve (330), and / or a second lubricating member is arranged between the second hinge shaft (220) and the second rod portion (320).
10. A scrubber vehicle characterized in that The mounting bracket (100) is fixed to the frame, and the brake device comprises the frame and any one of claims 7-9.