New energy brake pedal assembly

Abstract

The invention relates to the technical field of new energy automobiles, in particular to a new energy brake pedal assembly which comprises a pedal shaft, a pedal rotating shaft, a middle support and an angle sensor. The middle support is provided with a first positioning plate and a second positioning plate, and the first positioning plate and the second positioning plate are parallel to each other. Two ends of the pedal shaft are respectively a head end and a tail end; the pedal rotating shaft comprises a first connecting section and a second connecting section, the first connecting section and the head end are configured to be coaxially and detachably connected, and the pedal shaft and the pedal rotating shaft jointly clamp the first positioning plate; the angle sensor comprises a rotor and a stator, and the rotor and the stator are configured to be of a rotatable connecting structure; the tail end of the stator is coaxially connected with the rotor, and the stator is connected with the second positioning plate. The first positioning plate is jointly clamped by the pedal shaft and the pedal rotating shaft, so that axial movement of the pedal shaft is avoided, the angle sensor can avoid the zero drift phenomenon caused by movement of the pedal shaft, and output signal errors caused by movement of the pedal shaft can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a new energy brake pedal assembly. Background Art

[0002] During the energy recovery process of new energy vehicles, angle sensors are needed to collect the action of stepping on the brakes during vehicle deceleration, monitor the angle travel of the brake pedal in real time, and output signals representing changes in the pedal brake position. The energy recovery system starts or ends energy recovery based on this signal, and is also used to drive the vehicle's electric brakes.

[0003] The Chinese utility model patent with patent number ZL201621097084.6 discloses a brake pedal assembly with a sensor, in which the sensor is fixedly mounted on the right support block arranged at the right end of the pedal shaft, and the inductive end of the sensor is embedded and mounted on the right support block. During the rotation of the pedal shaft, the sensor is synchronously driven to cut the magnetic flux lines to generate a voltage signal. Among them, the left bushing and the right bushing are both clearance-matched with the pedal shaft, and there is a gap between the left support block and the right support block and the pedal shaft in the direction parallel to the axis of the pedal shaft, and there is a gap between the left bushing and the right bushing and the pedal, which makes the pedal shaft easy to move in the direction of its axis, and the movement of the pedal shaft may cause the sensor to drift or the output signal of the sensor to have a large error. Summary of the invention

[0004] To solve the above technical problems, the present invention provides a new energy brake pedal assembly, including a pedal shaft, a pedal shaft, an intermediate bracket and an angle sensor; the intermediate bracket is provided with a first positioning plate and a second positioning plate, the first positioning plate and the second positioning plate are parallel to each other, the first positioning plate is provided with a first mounting groove for accommodating the pedal shaft, and the second positioning plate is provided with a second mounting groove for accommodating the pedal shaft; the two ends of the pedal shaft are respectively a head end and an end end, along the direction from the second mounting groove to the first mounting groove, the head end is provided in the first mounting groove, and the end end is provided in the second mounting groove; the first positioning plate is also provided with a third mounting groove, The third mounting slot is coaxial with and communicates with the first mounting slot; the pedal shaft includes a first connecting section and a second connecting section, the first connecting section and the second connecting section are coaxially connected, wherein the first connecting section is inserted into the third mounting slot and the first mounting slot along the direction from the first mounting slot to the second mounting slot, and the first connecting section and the head end are configured as a coaxial and detachable connection, and the pedal shaft and the pedal shaft jointly clamp the first positioning plate; the angle sensor includes a rotor and a stator, and the rotor and the stator are configured as a rotatable connection structure; the end is coaxially connected to the rotor, and the stator is connected to the second positioning plate.

[0005] Further, the first connecting section is provided with an external thread, and the head end is provided with an internal threaded hole. The first connecting section and the head end are configured to be threadedly connected.

[0006] Further, it is characterized in that it further includes a metal flanged bearing. The metal flanged bearing includes a first bearing section and a second bearing section. The first bearing section is configured to be cylindrical, and the second bearing section is configured to be annular. One end of the first bearing section is coaxially connected to the second bearing section; there are two metal flanged bearings, namely a first metal flanged bearing and a second metal flanged bearing. The first metal flanged bearing is sleeved on the head end, and the first bearing section of the first metal flanged bearing is restricted between the first positioning plate and the head end. The second metal flanged bearing is sleeved on the tail end, and the first bearing section of the second metal flanged bearing is restricted between the second positioning plate and the tail end.

[0007] Further, it further includes a shaft tube, a positioning pin and a first thrust bearing. The shaft tube is sleeved on the pedal shaft, and the shaft tube and the pedal shaft are fixedly connected by the positioning pin. Positioning holes for the positioning pin to be inserted are respectively provided on the shaft tube and the pedal shaft; the first thrust bearing is sleeved on the head end, and the second bearing section of the first metal flanged bearing is restricted between the first thrust bearing and the first positioning plate. The shaft tube is located between the first thrust bearing and the second bearing section of the second metal flanged bearing.

[0008] Further, it further includes a second thrust bearing and a fourth mounting groove. The fourth mounting groove is provided on the first positioning plate. The fourth mounting groove is communicated with and coaxial with the third mounting groove. The third mounting groove is located between the first mounting groove and the fourth mounting groove. There is a gap between the third mounting groove and the pedal rotating shaft. The first connecting section passes through the fourth mounting groove; the pedal rotating shaft is further provided with a first protruding portion. The first protruding portion is located at the intersection of the first connecting section and the second connecting section. The first protruding portion protrudes radially from the first connecting section along the first connecting section; the second thrust bearing is arranged in the fourth mounting groove and sleeved on the first connecting section. The second thrust bearing is restricted between the first protruding portion and the first positioning plate. There is a gap between the first protruding portion and the first positioning plate.

[0009] Further, it further includes a microswitch, a fixing bracket, and a triggering component. The fixing bracket is detachably connected to the first positioning plate. The microswitch includes a housing and a driving rod. The housing is connected to the fixing bracket, and the driving rod extends outside the fixing bracket. The first convex portion protrudes radially from the second connecting section along the second connecting section. The triggering component is sleeved on the second connecting section. The triggering component is in close contact with the first convex portion. The triggering component and the second connecting section are configured to be rotatably connected. The triggering component has a second convex portion for contacting the driving rod.

[0010] Further, the triggering component is an elastic clip, which includes a first elastic member, a second elastic member, and a connecting member. The first elastic member includes a first bending portion, a first clamping portion, and a second bending portion. Two ends of the first clamping portion are respectively fixedly connected to the first bending portion and the second bending portion. The second elastic member includes a third bending portion, a second clamping portion, and a fourth bending portion. Two ends of the second clamping portion are respectively fixedly connected to the third bending portion and the fourth bending portion. Two ends of the connecting member are respectively fixedly connected to the first bending portion and the third bending portion. The connecting member, the first bending portion, and the third bending portion form the second convex portion. The first clamping portion and the second clamping portion are arranged face to face for clamping the pedal rotating shaft. The fourth bending portion includes a limiting piece located outside the second bending portion. When the elastic clip clamps the pedal rotating shaft, the second bending portion and the limiting piece form a clamping structure.

[0011] Further, both the first clamping portion and the second clamping portion are in the shape of a minor arc, and the diameters of the two minor arcs are both equal to the diameter of the pedal rotating shaft, and the opening directions of the two minor arcs both face the pedal rotating shaft.

[0012] The above technical solution has the following advantages or beneficial effects:

[0013] The new energy brake pedal assembly provided by the present invention is provided with a pedal rotating shaft that is coaxial with the pedal shaft and detachably connected. The pedal shaft and the pedal rotating shaft jointly clamp the first positioning plate, so that when the pedal rotating shaft has a tendency to move axially in the direction of its axis, this movement tendency is blocked by the first positioning plate, and the pedal shaft will not axially move relative to the first positioning plate. And the rotor of the angle sensor is coaxially connected to the end of the pedal shaft, that is, the input signal of the angle sensor is the rotation angle of the pedal shaft, so that the angle sensor can avoid the zero drift phenomenon caused by the axial movement of the pedal shaft, and the angle sensor can reduce the output signal error caused by the axial movement of the pedal shaft. Description of the Drawings

[0014] Figure 1 Structural schematic diagram of the new energy brake pedal assembly provided by the embodiment of the present invention;

[0015] Figure 2 Structural schematic diagram of the new energy brake pedal assembly provided by the embodiment of the present invention;

[0016] Figure 3 Structural schematic diagram of the first positioning plate and the second positioning plate provided by the embodiment of the present invention;

[0017] Figure 4 Structural schematic diagram of the new energy brake pedal assembly provided by the embodiment of the present invention;

[0018] Figure 5 Structural schematic diagram of the fixed bracket, the driving rod and the second protrusion provided by the embodiment of the present invention;

[0019] Figure 6 Structural schematic diagram of the elastic clip provided by the embodiment of the present invention;

[0020] Figure 7 Structural schematic diagram of the elastic clip provided by the embodiment of the present invention.

[0021] The reference numerals in the figure are represented as follows: 1 - pedal shaft; 11 - first end; 12 - second end; 2 - pedal rotating shaft; 21 - first connecting section; 22 - first protrusion; 23 - second connecting section; 3 - intermediate bracket; 31 - first positioning plate; 311 - first installation groove; 312 - third installation groove; 313 - fourth installation groove; 32 - second positioning plate; 321 - second installation groove; 322 - guiding hole; 4 - angle sensor; 41 - rotor; 42 - stator; 5 - microswitch; 51 - driving rod; 6 - fixed bracket; 7 - retaining piece; 8 - second protrusion; 9 - elastic clip; 91 - first elastic member; 911 - first bending part; 912 - first clamping part; 913 - second bending part; 92 - second elastic member; 921 - third bending part; 922 - second clamping part; 923 - fourth bending part; 9231 - limiting piece; 93 - connecting piece; 10 - shaft tube; 101 - positioning pin; 121 - first thrust bearing; 122 - second thrust bearing; 131 - first metal flanged bearing; 132 - second metal flanged bearing; 1311 - first bearing section; 1312 - second bearing section. Detailed implementation manners

[0022] The content of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment 1

[0024] In this embodiment, referring to Figure 1 、 Figure 2 and Figure 3 , a new energy brake pedal assembly is provided, which includes a pedal shaft 1, a pedal rotating shaft 2, an intermediate bracket 3 and an angle sensor 4;

[0025] The intermediate bracket 3 is provided with a first positioning plate 31 and a second positioning plate 32. The first positioning plate 31 and the second positioning plate 32 are parallel to each other. The first positioning plate 31 is provided with a first installation groove 311 for accommodating the pedal shaft 1, and the second positioning plate 32 is provided with a second installation groove 321 for accommodating the pedal shaft 1;

[0026] The two ends of the pedal shaft 1 are respectively a head end 11 and a tail end 12. Along the direction from the second installation groove 321 to the first installation groove 311, the head end 11 is arranged in the first installation groove 311, and the tail end 12 is arranged in the second installation groove 321;

[0027] The first positioning plate 31 is further provided with a third installation groove 312, and the third installation groove 312 is coaxial and communicated with the first installation groove 311;

[0028] The pedal rotating shaft 2 includes a first connecting section 21 and a second connecting section 23. The first connecting section 21 and the second connecting section 23 are coaxially connected. Among them, along the direction from the first installation groove 311 to the second installation groove 321, the first connecting section 21 is inserted into the third installation groove 312 and the first installation groove 311, and the first connecting section 21 and the head end 11 are configured to be coaxially and detachably connected. The pedal shaft 1 and the pedal rotating shaft 2 jointly clamp the first positioning plate 31;

[0029] The angle sensor 4 includes a rotor 41 and a stator 42, and the rotor 41 and the stator 42 are configured to be a rotatable connection structure;

[0030] The tail end 12 is coaxially connected with the rotor 41, and the stator 42 is connected with the second positioning plate 32.

[0031] For the new energy brake pedal assembly of this embodiment, when it is actually installed on a vehicle, the driver's foot exerts a stepping force on the pedal assembly; at this time, the intermediate bracket 3 remains stationary relative to the vehicle, while the pedal assembly rotates with the axis line of the pedal shaft 1 as the axis, so that the pedal assembly drives the pedal shaft 1 to rotate; the pedal shaft 1 and the pedal rotating shaft 2 are coaxially connected, so that the pedal shaft 1 drives the pedal rotating shaft 2 to rotate coaxially.

[0032] In this embodiment, the pedal shaft 1 is installed on the intermediate bracket 3; the intermediate bracket 3 includes a first positioning plate 31 and a second positioning plate 32 that are parallel to each other. After the first positioning plate 31 and the second positioning plate 32 are connected by any one of the connection methods in the prior art, as long as the first positioning plate 31 and the second positioning plate 32 maintain a parallel relationship. Preferably, the intermediate bracket 3 further includes a connecting plate, and the first positioning plate 31 and the second positioning plate 32 are connected by the connecting plate, and the first positioning plate 31, the connecting plate and the second positioning plate 32 are integrally formed; the intermediate bracket 3 in this embodiment is made of aluminum alloy material. In other embodiments, the intermediate bracket 3 can also be made of other suitable metal materials or lightweight materials.

[0033] When the two ends of the pedal shaft 1 are respectively connected to the first positioning plate 31 and the second positioning plate 32, the pedal shaft 1 forms a clearance fit with the first installation groove 311 of the first positioning plate 31, and the pedal shaft 1 forms a clearance fit with the second installation groove 321 of the second positioning plate 32; it should be understood that hereinafter, a first metal flanged bearing 131 is further provided between the pedal shaft 1 and the inner wall of the first installation groove 311, and a second metal flanged bearing 132 is further provided between the pedal shaft 1 and the inner wall of the second installation groove 321, which will not be mentioned here for the time being.

[0034] The processing method of the first installation groove 311 and the second installation groove 321 preferably adopts a numerical control processing method to improve the concentricity of the first installation groove 311 and the second installation groove 321.

[0035] The stator 42 of the angle sensor 4 is connected to the second positioning plate 32 of the intermediate bracket 3. Preferably, a guiding hole 322 is provided on the second positioning plate 32. When the housing of the stator 42 is inserted into the guiding hole 322, since the guiding hole 322 is coaxially arranged with the first installation groove 311 and the second installation groove 321, and the pedal shaft 1 and the rotor 41 are coaxially connected, the pedal shaft 1, the rotor 41, the stator 42, the guiding hole 322, the first installation groove 311 and the second installation groove 321 jointly form a coaxial structure, so the concentricity of the angle sensor 4 and the pedal shaft 1 is improved; the rotor 41 and the end 12 of the pedal shaft 1 are arranged to be coaxially connected. When the pedal shaft 1 rotates, the rotor 41 also rotates synchronously, and the angle sensor 4 converts the detected rotation angle of the rotor 41 into a voltage signal or a digital signal for output. The angle sensor 4 in this embodiment is a Hall angle sensor. In other embodiments, other types of angle sensors can be selected, such as optoelectronic angle sensors.

[0036] In this embodiment, after the pedal shaft 1 and the pedal rotating shaft 2 are coaxially connected, the pedal shaft 1 and the pedal rotating shaft 2 clamp the first positioning plate 31; specifically, along the direction from the second installation groove 321 to the first installation groove 311, the pedal shaft 1 applies a first clamping force to the first positioning plate 31. Correspondingly, along the direction from the first installation groove 311 to the second installation groove 321, the pedal rotating shaft 2 applies a second clamping force to the first positioning plate 31, so that the first positioning plate 31 is clamped by the first clamping force and the second clamping force together.

[0037] It should be understood that the positions where the pedal shaft 1 and the pedal rotating shaft 2 apply clamping forces to the first positioning plate 31 will be described in detail later and will not be mentioned here for the time being.

[0038] In the prior art (patent name: A brake pedal assembly with a sensor, application number: 201621097084.6), due to the axial clearance between the left bushing and the right bushing and the pedal, and due to the axial clearance between the left support block and the right support block and the pedal rotating shaft, when the pedal rotating shaft has a tendency to move axially towards the left support block, due to the existence of the two axial clearances of 'the clearance between the left bushing and the pedal' and 'the clearance between the left support block and the pedal rotating shaft', the pedal rotating shaft moves in the direction of the left support block; correspondingly, when the pedal rotating shaft has a tendency to move axially towards the right support block, due to the existence of the two axial clearances of 'the clearance between the right bushing and the pedal' and 'the clearance between the right support block and the pedal rotating shaft', the pedal rotating shaft moves in the direction of the right support block.

[0039] In this embodiment, after the pedal shaft 1 and the pedal rotating shaft 2 are connected, the first positioning plate 31 is clamped, so that the pedal shaft 1 and the pedal rotating shaft 2 do not move axially along the axis of the pedal shaft 1 respectively. The reasons are as follows.

[0040] If the pedal shaft 1 has a tendency to move axially along the direction from the first installation groove 311 to the second installation groove 321, since the pedal shaft 1 and the pedal rotating shaft 2 clamp the first positioning plate 31, the pedal rotating shaft 2 contacts the first positioning plate 31, and the reaction force applied by the first positioning plate 31 to the pedal rotating shaft 2 hinders the pedal shaft 1 from moving axially along the direction from the first installation groove 311 to the second installation groove 321;

[0041] If the pedal shaft has a tendency to move axially along the direction from the second installation groove 321 to the first installation groove 311, since the pedal shaft 1 and the pedal rotating shaft 2 clamp the first positioning plate 31, the pedal shaft 1 contacts the first positioning plate 31, and the reaction force applied by the first positioning plate 31 to the pedal shaft 1 hinders the pedal shaft 1 from moving axially along the direction from the second installation groove 321 to the first installation groove 311;

[0042] Similarly, when the pedal rotating shaft 2 has a tendency to move axially along the direction from the first installation groove 311 to the second installation groove 321, since the pedal shaft 1 and the pedal rotating shaft 2 clamp the first positioning plate 31, the pedal rotating shaft 2 contacts the first positioning plate 31, and the reaction force exerted by the first positioning plate 31 on the pedal rotating shaft 2 hinders the displacement of the pedal rotating shaft 2 along the direction from the first installation groove 311 to the second installation groove 321;

[0043] When the pedal rotating shaft 2 has a tendency to move axially along the direction from the second installation groove 321 to the first installation groove 311, since the pedal shaft 1 and the pedal rotating shaft 2 clamp the first positioning plate 31, the pedal shaft 1 contacts the first positioning plate 31, and the reaction force exerted by the first positioning plate 31 on the pedal shaft 1 hinders the displacement of the pedal rotating shaft 2 along the direction from the second installation groove 321 to the first installation groove 311.

[0044] The rotor 41 of the angle sensor 4 is coaxially connected to the end 12 of the pedal shaft 1, that is, the input signal of the angle sensor 4 is the rotation angle of the pedal shaft 1. Since the pedal shaft 1 does not generate axial movement towards the first positioning plate 31 or the second positioning plate 32, the angle sensor 4 can avoid the zero drift phenomenon caused by the axial movement of the pedal shaft 1, and the angle sensor 4 can reduce the output signal error caused by the axial movement of the pedal shaft 1.

[0045] Further, in the foregoing solution, how the pedal shaft 1 and the pedal rotating shaft 2 are coaxially connected is preferably implemented by the following technical solution.

[0046] See Figure 1 and Figure 2 , the first connection section 21 is provided with an external thread, and the first end 11 is provided with an internal threaded hole, and the first connection section 21 and the first end 11 are configured to be threadedly connected.

[0047] In this embodiment, during the process of threadedly connecting the pedal rotating shaft 2 and the pedal shaft 1, the pedal rotating shaft 2 and the pedal shaft 1 respectively have a first state before contact and a second state after contact with respect to the first positioning plate 31;

[0048] When in the first state, the pedal rotating shaft 2 and the pedal shaft 1 cannot exert a force or a clamping force on the first positioning plate 31 respectively;

[0049] When in the second state, the pedal rotating shaft 2 and the pedal shaft 1 respectively apply a force or a clamping force to the first positioning plate 31. Among them, as the length of the threaded connection between the pedal shaft 1 and the pedal rotating shaft 2 gradually increases, the force or clamping force applied by the pedal shaft 1 and the pedal rotating shaft 2 to the first positioning plate 31 gradually increases until the length of the threaded connection between the pedal shaft 1 and the pedal rotating shaft 2 reaches the limit length, so that the force or clamping force applied by the pedal shaft 1 and the pedal rotating shaft 2 to the first positioning plate 31 reaches the maximum force value. Thus, in this embodiment, the pedal shaft 1 and the pedal rotating shaft 2 clamp the first positioning plate 31.

[0050] In this embodiment, the pedal rotating shaft 2 and the pedal shaft 1 are threadedly connected. Preferably, a thread locking adhesive is applied at the threaded connection to further improve the fastening degree between the pedal rotating shaft 2 and the pedal shaft 1.

[0051] Further, in the foregoing solution, how to reduce the wear of the circumferential surface of the pedal shaft 1 respectively with the first positioning plate 31 and the second positioning plate 32 is preferably achieved by the following technical solution.

[0052] See Figure 1 and Figure 2 , the new energy brake pedal assembly further includes a metal flanged bearing. The metal flanged bearing includes a first bearing section 1311 and a second bearing section 1312. The first bearing section 1311 is configured as a cylindrical shape, and the second bearing section 1312 is configured as an annular shape. One end of the first bearing section 1311 and the second bearing section 1312 are coaxially connected;

[0053] There are two metal flanged bearings, namely a first metal flanged bearing 131 and a second metal flanged bearing 132. The first metal flanged bearing 131 is sleeved on the head end 11, and the first bearing section 1311 of the first metal flanged bearing 131 is restricted between the first positioning plate 31 and the head end 11. The second metal flanged bearing 132 is sleeved on the tail end 12, and the first bearing section 1311 of the second metal flanged bearing 132 is restricted between the second positioning plate 32 and the tail end 12.

[0054] The principle of the metal flanged bearing is common knowledge known to those skilled in the art and will not be elaborated here.

[0055] In the prior art (patent name: a brake pedal assembly with sensors, application number: 201621097084.6), a left bushing is provided between the left support block and the pedal rotating shaft. An interference fit is adopted between the left bushing and the left support block, and a clearance fit is adopted between the left bushing and the pedal rotating shaft. A right bushing is provided between the right support block and the pedal rotating shaft. An interference fit is adopted between the right bushing and the right support block, and a clearance fit is adopted between the right bushing and the pedal rotating shaft. In moving parts, parts are worn due to long-term friction. When the clearance between the shaft and the hole wears to a certain extent, the parts must be replaced. Therefore, materials with relatively low hardness and good wear resistance are usually selected for the shaft sleeve or bushing, which can reduce the wear of the shaft and the seat.

[0056] In this embodiment, by providing a first metal flanged bearing 131 between the first positioning plate 31 and the first end 11, and a second metal flanged bearing 132 between the second positioning plate 32 and the second end 12, the functions of the first metal flanged bearing 131 and the second metal flanged bearing 132 are respectively equivalent to the functions of the left bushing and the right bushing in the above prior art. The first metal flanged bearing 131 can reduce the wear between the first positioning plate 31 and the first end 11, and the second metal flanged bearing 132 can reduce the wear between the second positioning plate 32 and the second end 12.

[0057] Further, in the axial direction of the pedal shaft 1, how the pedal shaft 1 applies a first clamping force to the first positioning plate 31 is preferably realized by the following technical solution.

[0058] See Figure 1 and Figure 2 , the new energy brake pedal assembly further includes a shaft tube 10, a positioning pin 101 and a first thrust bearing 121. The shaft tube 10 is sleeved on the pedal shaft 1. The shaft tube 10 and the pedal shaft 1 are fixedly connected by the positioning pin 101. Positioning holes for the positioning pin 101 to insert are respectively provided on the shaft tube 10 and the pedal shaft 1;

[0059] The first thrust bearing 121 is sleeved on the first end 11. The second bearing section 1312 of the first metal flanged bearing 131 is restricted between the first thrust bearing 121 and the first positioning plate 31. The shaft tube 10 is located between the first thrust bearing 121 and the second bearing section 1312 of the second metal flanged bearing 132.

[0060] In this embodiment, in the direction parallel to the axis line of the pedal shaft 1, the second bearing section 1312 of the first metal flanged bearing 131 is located between the first positioning plate 31 and the first thrust bearing 121. There is close contact between the second bearing section 1312 of the first metal flanged bearing 131 and the first positioning plate 31, close contact between the second bearing section 1312 of the first metal flanged bearing 131 and the first thrust bearing 121, and close contact between the first thrust bearing 121 and the shaft tube 10. In the foregoing solution, it has been mentioned that the pedal shaft 1 and the pedal rotating shaft 2 are threadedly connected. During the connection process, the pedal rotating shaft 2 applies a force to the pedal shaft 1 along the direction from the second installation groove 3211 to the first installation groove 311. This force causes the pedal shaft 1 and the shaft tube 10 fixedly installed on the pedal shaft 1 to have a tendency to move along the direction from the second installation groove 3211 to the first installation groove 311. When the shaft tube 10 contacts the first thrust bearing 121, the first thrust bearing 121 contacts the second bearing section 1312 of the first metal flanged bearing 131, and the second bearing section 1312 of the first metal flanged bearing 131 contacts the first positioning plate 31, the shaft tube 10 applies a first clamping force to the first positioning plate 31. Therefore, along the direction from the second installation groove 3211 to the first installation groove 311, the pedal shaft 1 applies a first clamping force to the first positioning plate 31 through the shaft tube 10, the first thrust bearing 121, and the second bearing section 1312 of the first metal flanged bearing 131.

[0061] In the prior art (patent name: A brake pedal assembly with a sensor, application number: 201621097084.6), a left bushing is provided between the pedal and the pedal bracket. When the pedal rotates, sliding friction is generated between the pedal and the left bushing.

[0062] In this embodiment, the first thrust bearing 121 is provided between the first positioning plate 31 and the shaft tube 10. When the shaft tube 10 rotates, rolling friction is generated inside the first thrust bearing 121. It is common general knowledge known to those skilled in the art that the rolling friction force is less than the sliding friction force. Therefore, compared with the above prior art, this embodiment reduces the friction force between the shaft tube 10 and the first positioning plate 31, and the wear degree of the shaft tube 10 and the first positioning plate 31 is lower and the service life is longer.

[0063] In this embodiment, the second bearing section 1312 of the first metal flanged bearing 131 has the function of positioning the first thrust bearing 121.

[0064] Furthermore, in the foregoing solution, to reduce the friction force between the pedal rotating shaft 2 and the first positioning plate 31, the following preferred technical solution is implemented.

[0065] See Figure 1 、 Figure 2 and Figure 3, the new energy brake pedal assembly further includes a second thrust bearing 122 and a fourth installation groove 313. The fourth installation groove 313 is disposed on the first positioning plate 31. The fourth installation groove 313 communicates with and is coaxial with the third installation groove 312. The third installation groove 312 is located between the first installation groove 311 and the fourth installation groove 313. A clearance fit is adopted between the third installation groove 312 and the pedal rotating shaft 2. The first connecting section 21 passes through the fourth installation groove 313;

[0066] The pedal rotating shaft 2 is further provided with a first protrusion 22. The first protrusion 22 is located at the intersection of the first connecting section 21 and the second connecting section 23. The first protrusion 22 protrudes radially from the first connecting section 21 along the first connecting section 21;

[0067] The second thrust bearing 122 is disposed in the fourth installation groove 313 and sleeved on the first connecting section 21. The second thrust bearing 122 is restricted between the first protrusion 22 and the first positioning plate 31. There is a clearance between the first protrusion 22 and the first positioning plate 31.

[0068] In this embodiment, the statement that 'the second thrust bearing 122 is restricted between the first protrusion 22 and the first positioning plate 31, and there is a gap between the first protrusion 22 and the first positioning plate 31' includes two cases. In one case, along the direction from the second mounting groove 321 to the first mounting groove 311, the second thrust bearing 122 protrudes from the first positioning plate 31, so that there is a gap between the first protrusion 22 and the first positioning plate 31 in the axial direction of the pedal shaft 1. At this time, the first protrusion 22 and the first positioning plate 31 do not contact each other, so there is no wear between the first protrusion 22 and the first positioning plate 31. In the other case, along the direction from the second mounting groove 321 to the first mounting groove 311, the second thrust bearing 122 is recessed into the first positioning plate 31, and the first protrusion 22 is inserted into the fourth mounting groove 313 along the direction from the first mounting groove 311 to the second mounting groove 321, so that there is a gap between the first protrusion 22 and the first positioning plate 31 in the circumferential direction of the pedal shaft 1. At this time, the first protrusion 22 and the first positioning plate 31 do not contact each other, so there is no wear between the first protrusion 22 and the first positioning plate 31. In the above two cases, no wear occurs between the first protrusion 22 and the first positioning plate 31 because the second thrust bearing 122 is provided, and the second thrust bearing 122 is restricted between the first protrusion 22 and the first positioning plate 31, and there is a gap between the first protrusion 22 and the first positioning plate 31. Assuming that the second thrust bearing 122 is not provided in this embodiment, since the pedal rotating shaft 2 and the pedal shaft 1 jointly clamp the first positioning plate 31, along the axial direction of the pedal shaft 1, the first protrusion 22 of the pedal rotating shaft 2 directly contacts the first positioning plate 31. When the pedal rotating shaft 2 rotates relative to the first positioning plate 31, a frictional force is generated between the first protrusion 22 and the first positioning plate 31, and wear occurs on the pedal rotating shaft 2 and / or the first positioning plate 31.

[0069] A clearance fit is adopted between the third mounting groove 312 and the pedal rotating shaft 2, so that the pedal rotating shaft 2 located in the third mounting groove 312 does not contact the first positioning plate 31, and thus no frictional force and wear are generated between the first positioning plate 31 and the pedal rotating shaft 2 located in the third mounting groove 312.

[0070] In this embodiment, in the direction parallel to the axis line of the pedal shaft 1, the second thrust bearing 122 is located between the first convex portion 22 and the first positioning plate 31. The first convex portion 22 is in close contact with the second thrust bearing 122, and the second thrust bearing 122 is in close contact with the first positioning plate 31. In the foregoing solution, it has been mentioned that the pedal shaft 1 and the pedal rotating shaft 2 are threadedly connected. During the connection process, the pedal shaft 1 applies a force to the pedal rotating shaft 2 along the direction from the first installation groove 311 to the second installation groove 321, and this force causes the pedal rotating shaft 2 to have a movement tendency along the direction from the first installation groove 311 to the second installation groove 321. When the first convex portion 22 contacts the second thrust bearing 122 and the second thrust bearing 122 contacts the first positioning plate 31, the first convex portion 22 applies a second clamping force to the first positioning plate 31. Thus, along the direction from the first installation groove 311 to the second installation groove 321, the first convex portion 22 of the pedal rotating shaft 2 applies a second clamping force to the first positioning plate 31 through the second thrust bearing 122.

[0071] Further, how to set the microswitch 5 in this embodiment and how to drive the microswitch 5 are preferably realized by the following technical solutions.

[0072] See Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , the new energy brake pedal assembly further includes a microswitch 5, a fixed bracket 6 and a triggering component. The fixed bracket 6 is detachably connected to the first positioning plate 31;

[0073] The microswitch 5 includes a housing and a driving rod 51. The housing is connected to the fixed bracket 6, and the driving rod 51 extends to the outside of the fixed bracket 6;

[0074] The first convex portion 22 protrudes radially from the second connecting section 23 along the second connecting section 23. The triggering component is sleeved on the second connecting section 23. The triggering component is in close contact with the first convex portion 22. The triggering component and the second connecting section 23 are configured to be rotatably connected. The triggering component has a second convex portion 8, and the second convex portion 8 is used to contact the driving rod 51.

[0075] The structure of the microswitch 5 is common general knowledge known to those skilled in the art. Specifically, the microswitch 5 includes a housing and a driving rod 51 that is movably connected to the housing. The driving rod 51 is a transmission element for transmitting an external mechanical force to the moving reed, also known as a push pin, button, lever, roller, etc. The housing also includes a button, a moving contact, a static contact, a moving reed, a common terminal, a normally open terminal and a normally closed terminal, etc. The connection manner between the microswitch 5 and the fixed bracket 6 is also common general knowledge known to those skilled in the art. Specifically, the housing is assembled in the groove of the fixed bracket 6, and the retaining piece 7 covers the notch of the groove. The retaining piece 7 is fixedly connected to the fixed bracket 6.

[0076] In this embodiment, the sensitivity of the microswitch 5 is adjustable. During the process of adjusting the sensitivity of the microswitch 5, the staff first drives the trigger component to rotate relative to the pedal rotating shaft 2, and the rotation direction is from the trigger component to the driving rod 51, so that the trigger component applies pressure to the driving rod 51; under the action of this pressure, the driving rod 51 generates displacement, so that the driving rod 51 applies pressure to the button; under the action of the pressure applied by the driving rod 51, the button moves from the original position to the critical position; when the staff detects that the button reaches the critical position, the staff can slightly adjust the trigger component in the reverse direction.

[0077] It should be understood that whether the button reaches the critical position can be detected by using a multimeter to detect the contact state of the microswitch, which is common knowledge known to those skilled in the art.

[0078] It should be understood that the critical position is the position of the button when the contact state inside the microswitch 5 is changed, which is common knowledge known to those skilled in the art.

[0079] In this embodiment, during the installation of the trigger component, the first protrusion 22 plays a role in positioning the trigger component.

[0080] Furthermore, the structure of the component for adjusting the sensitivity of the microswitch 5 in the prior art is complex. How to reduce the processing steps of the component for adjusting the sensitivity of the microswitch 5, thereby reducing the production cost, is preferably achieved by the following technical solution.

[0081] See Figure 5 、 Figure 6 and Figure 7 , the trigger component is an elastic clip 9, and the elastic clip 9 includes a first elastic member 91, a second elastic member 92 and a connecting member 93. The first elastic member 91 includes a first bending portion 911, a first clamping portion 912 and a second bending portion 913. The two ends of the first clamping portion 912 are respectively fixedly connected to the first bending portion 911 and the second bending portion 913;

[0082] The second elastic member 92 includes a third bending portion 921, a second clamping portion 922 and a fourth bending portion 923. The two ends of the second clamping portion 922 are respectively fixedly connected to the third bending portion 921 and the fourth bending portion 923;

[0083] The two ends of the connecting member 93 are respectively fixedly connected to the first bending portion 911 and the third bending portion 921. The connecting member 93, the first bending portion 911 and the third bending portion 921 form a second protrusion 8;

[0084] The first clamping portion 912 and the second clamping portion 922 are arranged face to face, and the first clamping portion 912 and the second clamping portion 922 are used to clamp the pedal rotating shaft 2;

[0085] The fourth bending portion 923 includes a limiting piece 9231. The limiting piece 9231 is located outside the second bending portion 913. When the elastic clip 9 clamps the pedal rotating shaft 2, the second bending portion 913 and the limiting piece 9231 form a clamping structure.

[0086] The elastic force of the elastic clip 9 itself is transmitted to the pedal rotating shaft 2 through the first clamping portion 912 and the second clamping portion 922, and this force is the third clamping force; before the clamping structure formed by the second bending portion 913 and the limiting piece 9231, the first clamping portion 912 and the second clamping portion 922 only apply the third clamping force to the pedal rotating shaft 2. After the clamping structure formed by the second bending portion 913 and the limiting piece 9231, the second bending portion 913 and the limiting piece 9231 also generate a fourth clamping force on the pedal rotating shaft 2, which makes the force applied by the first clamping portion 912 and the second clamping portion 922 to the pedal rotating shaft 2 change from the third clamping force to the third clamping force and the fourth clamping force; thus, the clamping structure formed by the second bending portion 913 and the limiting piece 9231 plays a role in further clamping the pedal rotating shaft 2.

[0087] In the prior art (patent name: A combined pedal integrated with a microswitch, application number: 202221968273.1), the steps for adjusting the sensitivity of the microswitch are as follows. The first step is to screw the hexagon nut so that along the pedal axis direction, the hexagon nut moves away from the switch sleeve, and a gap is generated between the hexagon nut and the switch sleeve; the second step is to screw the switch sleeve so that the switch sleeve moves along the direction from the switch sleeve to the hexagon nut, and by adjusting the angle of the cam, the cam applies pressure to the driving rod of the microswitch, so that the button of the microswitch reaches the critical position; the third step is to screw the switch sleeve so that the switch sleeve moves slightly along the direction from the hexagon nut to the switch sleeve to achieve the adjustment of the sensitivity of the microswitch; the fourth step is to screw the hexagon nut to eliminate the gap between the hexagon nut and the switch sleeve, so that the hexagon nut relocates the switch sleeve; from the above steps for adjusting the sensitivity of the microswitch, it can be seen that the components used to adjust the sensitivity of the microswitch in the prior art are a brake shaft tube with an external thread, a switch sleeve with an internal thread and a cam, and a hexagon nut.

[0088] In this embodiment, the steps for adjusting the sensitivity of the microswitch 5 are as follows. First step, release the engaging structure formed by the second bent portion 913 and the limiting piece 9231, and reduce the clamping force exerted on the pedal rotating shaft 2 by the second bent portion 913 and the limiting piece 9231, so as to be able to reduce the frictional resistance when the elastic clip 9 rotates relative to the pedal rotating shaft 2. Second step, push the second protruding portion 8, so that the second protruding portion 8 rotates relative to the pedal rotating shaft 2, and the rotation direction is from the triggering component to the driving rod 51, so that the triggering component exerts pressure on the driving rod 51, and the button of the microswitch 5 reaches the critical position. Third step, slightly push the second protruding portion 8 in the reverse direction. Fourth step, re-form the engaging structure between the second bent portion 913 and the limiting piece 9231, that is, the adjustment of the sensitivity of the microswitch 5 is achieved. From the above steps for adjusting the sensitivity of the microswitch 5, it can be seen that the structural components for adjusting the sensitivity of the microswitch 5 in this embodiment are the pedal rotating shaft 2 (equivalent to the brake shaft tube with external threads in the prior art) and the elastic clip 9 (equivalent to the switch screw sleeve with internal threads and cams in the prior art). Compared with the prior art, the pedal rotating shaft 2 and the elastic clip 9 in this embodiment are connected by the third clamping force and the fourth clamping force. Compared with the threaded connection between the brake shaft tube and the switch screw sleeve in the prior art, there is no need to machine external threads on the outer surface of the pedal rotating shaft 2 and no need to machine internal threads on the inner surface of the elastic clip 9 in this embodiment, thereby further reducing the production cost.

[0089] Further, in the foregoing solution, how to always limit the pedal rotating shaft 2 inside the first clamping portion 912 and the second clamping portion 922 is preferably realized by the following technical solution.

[0090] See Figure 5 、 Figure 6 and Figure 7 , both the first clamping portion 912 and the second clamping portion 922 are in the shape of a minor arc, the diameters of the two minor arcs are both equal to the diameter of the pedal rotating shaft 2, and the opening directions of the two minor arcs both face the pedal rotating shaft 2.

[0091] In this embodiment, the inner walls of the first clamping portion 912 and the second clamping portion 922 are respectively attached to the outer wall of the rotating shaft, so that when the pedal rotating shaft 2 receives the acting forces pointing to the axis center from the first clamping portion 912 and the second clamping portion 922 and with equal magnitudes and opposite directions, the pedal rotating shaft 2 will not have radial play, that is, the pedal rotating shaft 2 is always limited inside the minor arc shape of the first clamping portion 912 and the second clamping portion 922.

[0092] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. New energy brake pedal assembly, characterized in that: It includes a pedal shaft, a pedal shaft, an intermediate bracket and an angle sensor; The intermediate bracket is provided with a first positioning plate and a second positioning plate, the first positioning plate and the second positioning plate are parallel to each other, the first positioning plate is provided with a first mounting groove for accommodating the pedal shaft, and the second positioning plate is provided with a second mounting groove for accommodating the pedal shaft; The two ends of the pedal shaft are a head end and a tail end respectively, along the direction from the second mounting groove to the first mounting groove, the head end is arranged in the first mounting groove, and the tail end is arranged in the second mounting groove; The first positioning plate is further provided with a third mounting groove, and the third mounting groove is coaxial with and communicated with the first mounting groove; The pedal shaft comprises a first connecting section and a second connecting section, the first connecting section and the second connecting section are coaxially connected, wherein along the direction from the first mounting groove to the second mounting groove, the first connecting section is inserted into the third mounting groove and the first mounting groove, and the first connecting section and the head end are configured to be coaxially and detachably connected, and the pedal shaft and the pedal shaft jointly clamp the first positioning plate; The angle sensor comprises a rotor and a stator, wherein the rotor and the stator are configured as a rotatable connection structure; The end is coaxially connected to the rotor, and the stator is connected to the second positioning plate.

2. The new energy brake pedal assembly according to claim 1 is characterized in that: The first connecting section is provided with an external thread, the head end is provided with an internal thread hole, and the first connecting section and the head end are configured to be threadedly connected.

3. The new energy brake pedal assembly according to claim 1 is characterized in that: Also included is a metal flanged bearing, the metal flanged bearing comprising a first bearing section and a second bearing section, the first bearing section is configured as a cylinder, the second bearing section is configured as a ring, and one end of the first bearing section is coaxially connected to the second bearing section; There are two metal flanged bearings, namely a first metal flanged bearing and a second metal flanged bearing. The first metal flanged bearing is sleeved on the head end, and the first bearing section of the first metal flanged bearing is confined between the first positioning plate and the head end. The second metal flanged bearing is sleeved on the end, and the first bearing section of the second metal flanged bearing is confined between the second positioning plate and the end.

4. The new energy brake pedal assembly according to claim 3 is characterized in that: It also includes an axle tube, a locating pin and a first thrust bearing, wherein the axle tube is sleeved on the pedal shaft, the axle tube and the pedal shaft are fixedly connected via the locating pin, and the axle tube and the pedal shaft are respectively provided with locating holes for inserting the locating pin; The first thrust bearing is sleeved on the head end, the second bearing section of the first metal flange bearing is confined between the first thrust bearing and the first positioning plate, and the shaft tube is located between the first thrust bearing and the second bearing section of the second metal flange bearing.

5. The new energy brake pedal assembly according to claim 4 is characterized in that: It also includes a second thrust bearing and a fourth mounting groove, wherein the fourth mounting groove is arranged on the first positioning plate, the fourth mounting groove is communicated with and coaxial with the third mounting groove, the third mounting groove is located between the first mounting groove and the fourth mounting groove, there is a gap between the third mounting groove and the pedal shaft, and the first connecting section passes through the fourth mounting groove; The pedal shaft is further provided with a first protrusion, the first protrusion is located at the intersection of the first connecting section and the second connecting section, and the first protrusion protrudes from the first connecting section along the radial direction of the first connecting section; The second thrust bearing is arranged in the fourth installation groove and sleeved on the first connecting section. The second thrust bearing is restricted between the first protrusion and the first positioning plate. There is a gap between the first protrusion and the first positioning plate.

6. The new energy brake pedal assembly according to claim 1, characterized in that: It also includes a micro switch, a fixing bracket and a trigger component, wherein the fixing bracket is detachably connected to the first positioning plate; The micro switch comprises a housing and a driving rod, wherein the housing is connected to the fixing bracket, and the driving rod extends to the outside of the fixing bracket; The first protrusion protrudes from the second connecting section in a radial direction of the second connecting section, the trigger component is sleeved on the second connecting section, the trigger component and the first protrusion are in close contact, the trigger component and the second connecting section are configured to be rotatably connected, the trigger component has a second protrusion, and the second protrusion is used to contact the driving rod.

7. The new energy brake pedal assembly according to claim 6, characterized in that: The trigger component is an elastic clip, which includes a first elastic member, a second elastic member and a connecting member, wherein the first elastic member includes a first bending portion, a first clamping portion and a second bending portion, and two ends of the first clamping portion are fixedly connected to the first bending portion and the second bending portion respectively; The second elastic member includes a third bending portion, a second clamping portion and a fourth bending portion, and two ends of the second clamping portion are fixedly connected to the third bending portion and the fourth bending portion respectively; Two ends of the connecting member are fixedly connected to the first bending portion and the third bending portion respectively, and the connecting member, the first bending portion and the third bending portion form the second protruding portion; The first clamping portion and the second clamping portion are arranged face to face, and the first clamping portion and the second clamping portion are used to clamp the pedal shaft; The fourth bending portion includes a limiting piece, and the limiting piece is located outside the second bending portion. When the elastic clip clamps the pedal shaft, the second bending portion and the limiting piece form a clamping structure.

8. The new energy brake pedal assembly according to claim 7, characterized in that: The first clamping portion and the second clamping portion are both in a minor arc shape, the diameters of the two minor arcs are both equal to the diameter of the pedal shaft, and the opening directions of the two minor arcs are both toward the pedal shaft.

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