CN213148971U

CN213148971U - Speed detection device and work vehicle

Info

Publication number: CN213148971U
Application number: CN202022210700.7U
Authority: CN
Inventors: 李昴; 潘文龙; 郭汐
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-05-07
Anticipated expiration: 2030-09-30

Abstract

The utility model provides a speed detection device and operation vehicle. Speed detection device is used for detecting the speed of stretching out of flexible subassembly, and speed detection device includes: the driving shaft is arranged on the telescopic assembly; the driving wheel is arranged at one end of the driving shaft; a rotary encoder provided at the other end of the drive shaft; the driving mechanism is used for driving the driving wheel to drive the driving shaft to rotate and enabling the telescopic assembly to extend or retract; the rotary encoder is provided with a central shaft, and the central shaft is connected with the driving shaft so that the central shaft and the driving shaft synchronously rotate. The utility model discloses a with rotary encoder and drive shaft connection, combine the rotation of drive shaft, rotary encoder's rotation and the flexible of flexible subassembly, can measure the flexible speed of flexible subassembly in real time, in succession.

Description

Speed detection device and work vehicle

Technical Field

The application belongs to the technical field of mechanical equipment, and particularly relates to a speed detection device and an operation vehicle.

Background

In the related art, a construction machine such as a crane or a concrete pump truck needs to unfold four legs during operation, and the unfolding amplitude of the legs determines the operation range of the crane or the concrete pump truck. Generally, the larger the extension amplitude of the supporting leg is, the wider the operation range of the upper mounting of the supporting leg is, and the fact that the angle of the extension of the supporting leg after the supporting leg is detected at any time has practical significance for ensuring the safe operation of the upper mounting of the supporting leg. At present, the domestic pump truck is usually only completely supported and supported on one side for ensuring safety during operation, and the problem that the safe operation of the pump truck cannot be ensured due to the fact that the extension length of the support leg of the pump truck during linear motion can not be detected continuously in real time can not be solved.

SUMMERY OF THE UTILITY MODEL

Embodiments according to the present invention aim to solve or improve at least one of the above technical problems.

According to the utility model discloses a first aim at provides a speed detection device.

According to the utility model discloses a second aim at provides a work vehicle.

For the realization according to the utility model discloses a first purpose of embodiment, the technical scheme of the utility model provide a speed detection device for detect the stretching out speed of flexible subassembly, speed detection device includes: the driving shaft is arranged on the telescopic assembly; the driving wheel is arranged at one end of the driving shaft; a rotary encoder provided at the other end of the drive shaft; the driving mechanism is used for driving the driving wheel to drive the driving shaft to rotate and enabling the telescopic assembly to extend or retract; the rotary encoder is provided with a central shaft, and the central shaft is connected with the driving shaft so that the central shaft and the driving shaft synchronously rotate.

In the technical scheme, the telescopic assembly comprises a fixed part and a telescopic part, and the telescopic part can be telescopic relative to the fixed part. One end of the driving shaft is connected with a driving wheel, and the other end of the driving shaft is connected with a rotary encoder. The driving mechanism drives the driving wheel to rotate, and the driving wheel is fixedly connected with the driving shaft, so that the driving shaft and the driving wheel synchronously rotate, and the central shaft of the rotary encoder and the driving shaft synchronously rotate. The rotary encoder converts optical signals into electric signals through the light emitting diode, the coded disc and the photosensitive tube, so that the number of rotating turns of the rotary encoder can be recorded, the rotating angle of the rotary encoder in unit time can be recorded, and finally the length and the speed of the telescopic assembly can be calculated by combining the reference circle radius of the driving wheel. Therefore, the speed detection device realizes real-time and continuous measurement on the telescopic assembly, and the rotary encoder has low cost compared with other stay wire sensors.

In addition, according to the technical scheme that the embodiment of the utility model provides can also have following additional technical characterstic:

in the above technical solution, the driving mechanism includes: a power mechanism; and the transmission assembly is connected with the power mechanism and drives the driving wheel to rotate.

In this technical scheme, power unit can be motor etc. to provide the power supply, actuating mechanism can drive the drive wheel through drive assembly and rotate, thereby realize rotary encoder's synchronous rotation and the stretching out or retracting of flexible subassembly. The transmission assembly can be gear pair transmission, belt transmission or chain transmission and the like, and the purpose is to realize the rotation of the rotary encoder and drive the telescopic assembly to extend or retract at the same time.

In any of the above technical solutions, the transmission assembly includes: the driving chain wheel is connected with the power mechanism; the chain is connected between the driving chain wheel and the driving wheel; wherein, the drive wheel is the sprocket, and driving sprocket and drive wheel are located respectively on the flexible subassembly.

In this technical scheme, transmission assembly adopts chain drive's structural style to drive the drive wheel and rotate. Specifically, adopt driving sprocket and power unit to be connected, regard the sprocket as the drive wheel simultaneously, be connected through the chain between driving sprocket and drive wheel to make driving sprocket can drive the drive wheel through the chain and rotate. This technical scheme utilizes chain, driving sprocket, sprocket as the drive wheel, and the structure wearing and tearing are little, long service life, and the reliability is high, and the drive shaft carries out the transmission as first fastener and center pin through the tacking screw, has realized the linkage with rotary encoder, and its structural style is low to manufacturing and installation accuracy requirement, and the fault-tolerant rate is high, easily realizes. Meanwhile, the chain is arranged along the extending and retracting directions of the telescopic assembly, so that the occupied space is small and the structure is compact.

In any of the above technical solutions, the speed detecting apparatus further includes: the connecting structure is rotatably connected with the driving shaft and fixedly connected with the telescopic assembly.

In the technical scheme, the driving shaft needs to keep rotating and needs to be fixed, so that the use requirement of the driving shaft can be met by rotatably connecting the connecting structure with the driving shaft. In order to make the structure of the speed detection device compact, the connecting structure can be selectively connected with the telescopic assembly, so that the occupied space can be reduced, and the requirement of compact structure is met.

In any of the above technical solutions, the connection structure includes: the connecting flange is sleeved outside the driving shaft; the bearing inner ring is fixedly connected with the driving shaft; the bearing outer ring is fixedly connected with the connecting flange; wherein, flange and flexible subassembly are connected.

In this solution, the connection structure may specifically include a connection flange and a bearing. The connecting flange has a cylindrical structure, at least one part of the driving shaft penetrates through the connecting flange, and the bearing is arranged between the inner wall of the connecting flange and the surface of the driving shaft. The bearing includes bearing inner race and bearing outer lane, and the bearing inner race passes through interference fit with the drive shaft and realizes fixed connection, and the bearing outer lane passes through interference fit with flange and realizes fixed connection to make the drive shaft pass through the rotation connection that the relative flange was realized to the bearing, fasteners such as flange accessible bolt are installed on flexible subassembly. The driving shaft is rotatably connected with the connecting flange through the bearing, the structure is compact, and the rotation is reliable. In addition, in order to ensure the rotating stability of the driving shaft, two bearings are arranged between the connecting flange and the driving shaft in the axial direction of the driving shaft, and the two bearings can be separated by a baffle ring arranged on the inner wall of the connecting flange. And in order to guarantee the structural stability of bearing installation, be equipped with the shaft shoulder on the drive shaft, set up first retaining ring in shaft shoulder department, one of them bearing is close to first retaining ring. The other bearing is close to the second retainer ring. By providing an annular groove in the drive shaft, the second retaining ring can be disposed in the annular groove. That is, two bearings may be installed between the first retainer ring and the second retainer ring.

In any of the above technical solutions, the speed detecting apparatus further includes: a limiting component; wherein, rotary encoder still includes the casing, and the center pin rotates and sets up in the one end of casing, and spacing subassembly and casing fixed connection for the rotation of restriction casing.

In this technical scheme, spacing subassembly specifically mainly comprises limiting plate and gag lever post, and the round hole has been seted up to the one end of limiting plate to supply the center pin to run through. A plurality of through-holes have been seted up around the round hole, and a plurality of through-holes can set up with the axle center, and evenly distributed can be used to wear to establish fasteners such as screw and be connected with the casing. One end of the limiting plate, which is far away from the round hole, is provided with a notch, one end of the limiting rod penetrates through the notch, and the limiting plate is connected with the limiting rod. The one end that the limiting plate was kept away from to the gag lever post can also fix the object and connect to can restrict the displacement of gag lever post, make the gag lever post can cooperate the limiting plate to carry out spacingly to rotary encoder, simple structure, reliable.

In any one of the above technical solutions, the limiting component includes: one end of the limiting plate is fixedly connected with the shell, and the other end of the limiting plate is provided with a notch; and one end of the limiting rod is connected with one end of the limiting plate far away from the rotary encoder, and the other end of the limiting rod is connected with the limiting assembly.

In this technical scheme, in order to avoid rotary encoder's center pin when rotating for the casing can not rotate along with it, consequently, need carry on spacingly to the casing. At least one part of the limiting assembly is connected with the shell, and at least one other part of the limiting assembly is connected with the fixed object, so that the rotation of the rotary encoder, namely the rotation of the shell, can be avoided.

Among any above-mentioned technical scheme, the gag lever post includes: a sleeve; the screw rod penetrates through the sleeve and is in threaded connection with the sleeve; wherein, the notch is run through to telescopic at least partly, and the screw rod is kept away from the one end of notch and is connected with spacing subassembly.

In the technical scheme, the limiting rod mainly comprises a sleeve and a screw. Wherein, telescopic one end is equipped with the internal thread, and the screw rod runs through the sleeve, and screw rod and sleeve threaded connection, simple structure, and the length of screw rod can finely tune. One end accessible screw of screw rod is connected with the limiting plate, and the screw rod sets up realization such as threaded one end accessible nut and packing ring and is connected with fixed object, can improve the adaptability of gag lever post to operational environment.

In any of the above technical solutions, the speed detecting apparatus further includes: and the protective cover is sleeved outside the rotary encoder.

In this technical scheme, in order to avoid rotary encoder to prevent that the artificial rotary encoder that tramples from damaging, can set up the protection casing and cup joint in rotary encoder's outside. In addition, the protective cover can prevent rainwater erosion and improve the overall aesthetic property.

Realize according to the utility model discloses a second purpose of embodiment, the technical scheme of the utility model provides an operating vehicle, include: a vehicle body; the telescopic assembly comprises a turret and telescopic legs, the telescopic legs are connected with the turret in a sliding mode, and the turret is connected with the vehicle body; the speed detection device in any technical scheme is used for detecting the extending speed of the telescopic leg relative to the turret.

In the technical scheme, the operation vehicle can be a concrete pump truck, and specifically can comprise a truck body and a telescopic assembly. Wherein the telescoping assembly may include a turret and transverse telescoping legs. A slideway is arranged in the turret, and the telescopic legs can be telescopic along the slideway. The speed detection device can be connected to the telescopic legs through connecting flanges, the screw rod can be connected with the turret, and the driving chain wheel can be installed in the slide way. Thereby enabling the speed detection means to detect the speed of the telescoping leg. In addition, because according to the utility model discloses an operating vehicle that technical scheme provided includes according to the utility model discloses a speed detection device among any technical scheme, consequently it has according to the utility model discloses a whole beneficial effect of speed detection device among any technical scheme.

Additional aspects and advantages of embodiments in accordance with the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments in accordance with the invention.

Drawings

The above and/or additional aspects and advantages according to embodiments of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a construction machine capable of detecting an extension range of a support leg in the related art;

fig. 2 is a flowchart of a method of detecting a leg extension range of a construction machine according to the related art;

fig. 3 is a second flowchart of a method of detecting a leg extension of a construction machine according to the related art;

FIG. 4 is a schematic structural diagram of a leg position detecting device according to the related art;

FIG. 5 is a second schematic structural view of a leg position detecting device in the related art;

FIG. 6 is an enlarged view A of FIG. 5;

fig. 7 is a schematic diagram of the components of a speed detection device according to some embodiments of the present invention;

fig. 8 is a schematic diagram of the composition of the drive mechanism of the speed detection device according to some embodiments of the present invention;

fig. 9 is a front view schematic diagram of a speed detection device according to some embodiments of the present invention;

fig. 10 is a schematic top view of a speed detection device according to some embodiments of the present invention;

FIG. 11 is a schematic sectional view taken along line B-B of FIG. 10;

FIG. 12 is a schematic cross-sectional view taken along line D-D of FIG. 10;

fig. 13 is a front view schematic diagram of a drive wheel of a speed detection device according to some embodiments of the present invention;

fig. 14 is a schematic top view of a drive wheel of a speed detection device according to some embodiments of the present invention;

fig. 15 is a schematic structural view of a limiting plate of a speed detection device according to some embodiments of the present invention;

fig. 16 is a schematic structural view of a drive shaft of a speed detection device according to some embodiments of the present invention;

fig. 17 is a schematic cross-sectional view of a connecting flange of a speed detection device according to some embodiments of the present invention;

fig. 18 is a schematic structural view of a protective cover of a speed detection device according to some embodiments of the present invention;

fig. 19 is an exploded view of a rotary encoder of a speed detection device according to some embodiments of the present invention;

fig. 20 is a schematic illustration of the composition of a work vehicle according to some embodiments of the present disclosure;

fig. 21 is a schematic diagram of the components of a telescoping assembly of a work vehicle according to some embodiments of the present disclosure;

fig. 22 is one of the schematic structural views of a telescoping leg of a work vehicle according to some embodiments of the present disclosure;

fig. 23 is a second schematic structural view of a telescoping leg of a work vehicle according to some embodiments of the present disclosure.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 6 is:

100': an engineering machine capable of detecting the extension amplitude of a supporting leg; 110': a spool; 120': a pull wire; 130': supporting legs; 100': a landing leg in-place detection device; 110': a support leg outer frame; 120': a horizontal supporting leg inner frame; 130': a sleeve; 140': a spring; 150': a slider; 160': a travel switch contact.

Wherein, the correspondence between the reference numbers and the part names in fig. 7 to 23 is:

10: a work vehicle; 100: a speed detection device; 102: a first fastener; 104: a gasket; 106: a second fastener; 108: a first retainer ring; 1010: a baffle ring; 1012: a flat bond; 1014: a second retainer ring; 110: a drive shaft; 120: a drive wheel; 130: a rotary encoder; 132: a central shaft; 134: a housing; 140: a drive mechanism; 142: a power mechanism; 144: a transmission assembly; 1442: a drive sprocket; 1444: a chain; 150: a connecting structure; 152: a connecting flange; 154: a bearing inner race; 156: a bearing outer race; 160: a limiting component; 162: a limiting plate; 1622: a notch; 164: a limiting rod; 1642: a sleeve; 1644: a screw; 170: protective cover, 200: a telescoping assembly; 210: a turret; 220: a telescopic leg.

Detailed Description

In order to make the above objects, features and advantages according to the embodiments of the present invention more clearly understood, embodiments according to the present invention will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments according to the invention, however, embodiments according to the invention may also be implemented in other ways than those described herein, and therefore the scope of protection of embodiments according to the invention is not limited by the specific embodiments disclosed below.

In the related art, as shown in fig. 1, a construction machine 100 'capable of detecting an extension amplitude of a leg is disclosed, which is a construction machine that measures an amplitude of a leg using a pull sensor, and as shown in fig. 2 and 3, a construction machine 100' capable of detecting an extension amplitude of a leg includes a pull sensor, a spool 110 ', and a pull wire 120'. The extension length of the support leg 130 ' is determined by the number of turns of the wire sensor rolling along the spool 110 ', as shown in fig. 2 and 3, and a method for measuring the extension amplitude of the support leg using the construction machine 100 ' capable of detecting the extension amplitude of the support leg is also provided.

In another related art, as shown in fig. 4 and 6, a leg-in-place detecting device 100 "is disclosed, and as shown in fig. 5, the leg-in-place detecting device 100" includes a horizontal leg outer frame 110 ", a horizontal leg inner frame 120", a sleeve 130 ", a spring 140", a slider 150 ", a stroke switch contact 160", a stroke switch, etc.

To sum up, to the above limitation, the embodiments of the present invention at least need to solve the following problems: and continuously detecting the extension amplitude of the supporting leg in real time.

Speed detection apparatus 100 and work vehicle 10 according to some embodiments of the present invention are described below with reference to fig. 7-23.

Example 1

As shown in fig. 7 and 11, the present embodiment provides a speed detecting apparatus 100 for detecting an extension speed of a telescopic assembly 200, the speed detecting apparatus 100 including: a drive shaft 110, a drive wheel 120, a rotary encoder 130, and a drive mechanism 140. The driving shaft 110 is disposed on the telescopic assembly 200, the driving wheel 120 is disposed at one end of the driving shaft 110, the rotary encoder 130 is disposed at the other end of the driving shaft 110, and the driving mechanism 140 is configured to drive the driving wheel 120 to rotate the driving shaft 110, and extend or retract the telescopic assembly 200. The rotary encoder 130 has a central shaft 132, and the central shaft 132 is connected to the driving shaft 110, so that the central shaft 132 and the driving shaft 110 rotate synchronously.

In this embodiment, the telescoping assembly 200 includes a fixed portion and a telescoping portion that telescopes relative to the fixed portion. The specific structure of the driving shaft 110 is shown in fig. 16, one end of the driving shaft 110 is connected to the driving wheel 120 through a flat key 1012, and the driving shaft 110 is further connected to the driving wheel 120 through a second fastening member 106 and a first retaining ring 108, the second fastening member 106 is a screw, the second fastening member 106 penetrates the first retaining ring 108 and then is in threaded connection with the driving shaft 100, and the first retaining ring 108 covers at least a portion of the driving wheel 120, so that the connection structure between the driving wheel 120 and the driving shaft 110 is firmer. The other end of the drive shaft 110 is connected to a rotary encoder 130 through a first fastener 102, and the first fastener 102 may be a fastening screw. The specific structure of the rotary encoder 130 may be as shown in fig. 19. The driving mechanism 140 drives the driving wheel 120 to rotate, and since the driving wheel 120 is fixedly connected to the driving shaft 110, the driving shaft 110 and the driving wheel 120 rotate synchronously, and further the central shaft 132 of the rotary encoder 130 rotates synchronously with the driving shaft 110. As shown in fig. 19, the rotary encoder 130 converts the optical signal into the electrical signal through the light emitting diode, the code wheel and the photo-sensitive tube, so as to record the number of rotation turns of the rotary encoder 130, and at the same time, the angular velocity of the rotary encoder 130 can be obtained by recording the rotation angle of the rotary encoder 130 in unit time, and finally, the length and the velocity of the telescopic assembly 200 can be respectively calculated by combining the reference circle radius of the driving wheel 120. Thus, the speed detection device 100 provides real-time, continuous measurement of the retraction assembly 200, and the rotary encoder 130 is less expensive than other pull wire sensors.

Example 2

As shown in fig. 8, the present embodiment provides a speed detection apparatus 100. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the drive mechanism 140 includes: the power mechanism 142 and the transmission assembly 144, the transmission assembly 144 is connected with the power mechanism 142 and drives the driving wheel 120 to rotate.

In this embodiment, the power mechanism 142 may be a motor or the like to provide a power source, and the driving mechanism 140 may drive the driving wheel 120 to rotate through the transmission assembly 144, so as to achieve the synchronous rotation of the rotary encoder 130 and the extension or retraction of the telescopic assembly 200. The transmission assembly 144 may be a gear pair transmission, a belt transmission, a chain transmission, or the like, and is designed to simultaneously rotate the rotary encoder 130 and drive the telescopic assembly 200 to extend or retract.

Example 3

As shown in fig. 22 and 23, the present embodiment provides a speed detection apparatus 100. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the transmission assembly 144 includes: a driving sprocket 1442 and a chain 1444, wherein the driving sprocket 1442 is connected with the power mechanism 142; a chain 1444 is connected between the drive sprocket 1442 and the drive wheel 120. The driving wheel 120 is a sprocket, and the driving sprocket 1442 and the driving wheel 120 are respectively disposed on the telescopic assembly 200.

In this embodiment, the transmission assembly 144 adopts a chain transmission structure to drive the driving wheel 120 to rotate. Specifically, by using the driving sprocket 1442 to connect with the power mechanism 142 and using the sprocket as the driving wheel 120, as shown in fig. 13 and 14, the driving sprocket 1442 is connected with the driving wheel 120 through a chain 1444, so that the driving sprocket 1442 can drive the driving wheel 120 to rotate through the chain 1444. In the embodiment, the chain 1444, the driving sprocket 1442 and the sprocket are used as the driving wheel 120, the structural member is small in abrasion, the service life is long, the reliability is high, the driving shaft 110 is used as the first fastening member 102 to be driven with the central shaft 132 through the set screw, the linkage of the 1444 and the rotary encoder 130 is realized, the structural form of the driving shaft is low in requirements on manufacturing and mounting accuracy, the fault tolerance rate is high, and the driving shaft is easy to realize. Meanwhile, the chain 1444 is arranged along the extending and retracting directions of the telescopic assembly 200, so that the occupied space is small and the structure is compact.

Example 4

As shown in fig. 11, the present embodiment provides a speed detection apparatus 100. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the speed detection apparatus 100 further includes: the connecting structure 150, the connecting structure 150 is rotatably connected to the driving shaft 110, and the connecting structure 150 is fixedly connected to the telescopic assembly 200.

In this embodiment, since the driving shaft 110 needs to be rotated and fixed, the connecting structure 150 is connected to the driving shaft 110 for rotation, so as to meet the use requirement of the driving shaft 110. As shown in fig. 9 and 10, in order to make the speed detection apparatus 100 compact, the connection structure 150 may be selectively connected to the telescopic assembly 200, so as to reduce the occupied space and meet the requirement of compact structure.

Example 5

the connection structure 150 includes: a connecting flange 152, a bearing inner ring 154 and a bearing outer ring 156, wherein the connecting flange 152 is sleeved outside the drive shaft 110. Bearing inner race 154 is fixedly coupled to drive shaft 110. The bearing outer race 156 is fixedly connected to the connecting flange 152. Wherein the attachment flange 152 is coupled to the telescoping assembly 200.

In this embodiment, the connecting structure 150 may specifically include a connecting flange 152 and a bearing. As shown in fig. 17, the connecting flange 152 has a cylindrical structure. At least a portion of the drive shaft 110 extends through the attachment flange 152 and the bearing is disposed between an inner wall of the attachment flange 152 and a surface of the drive shaft 110. The bearing includes bearing inner race 154 and bearing outer race 156, and bearing inner race 154 realizes fixed connection through interference fit with drive shaft 110, and bearing outer race 156 realizes fixed connection through interference fit with flange 152 to make drive shaft 110 realize the rotation of relative flange 152 through the bearing and connect, flange 152 accessible fasteners such as bolt are installed on telescopic component 200. The rotary connection between the driving shaft 110 and the connecting flange 152 is realized through a bearing, the structure is compact, and the rotation is reliable. In addition, in order to ensure the smooth rotation of the driving shaft 110, two bearings are axially disposed between the connecting flange 152 and the driving shaft 110, and the two bearings can be separated by a baffle ring 1010 disposed on the inner wall of the connecting flange 152. And in order to guarantee the structural stability of the bearing installation, a shaft shoulder is arranged on the driving shaft 110, a first retaining ring 108 is arranged at the shaft shoulder, and one of the bearings is close to the first retaining ring 108. The other bearing is adjacent the second stop 1014. The second retainer 1014 may be disposed in an annular groove formed in the drive shaft 110. That is, two bearings may be mounted between the first retainer ring 108 and the second retainer ring 1014.

Example 6

As shown in fig. 9 and 12, the present embodiment provides a speed detection apparatus 100. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the speed detection apparatus 100 further includes: a stop assembly 160. The rotary encoder 130 further includes a housing 134, the central shaft 132 is rotatably disposed at one end of the housing 134, and the limiting component 160 is fixedly connected to the housing 134 for limiting the rotation of the housing 134.

In this embodiment, in order to prevent the housing 134 from rotating when the central shaft 132 of the rotary encoder 130 rotates, the housing 134 needs to be limited. By coupling at least a portion of the stop assembly 160 to the housing 134 and coupling at least another portion of the stop assembly 160 to a stationary object, rotation of the rotary encoder itself, i.e., the housing 134, is avoided.

Example 7

As shown in fig. 11 and 12, the present embodiment provides a speed detection apparatus 100. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the spacing assembly 160 includes: a limiting plate 162 and a limiting rod 164, wherein one end of the limiting plate 162 is fixedly connected with the shell 134; one end of the limiting rod 164 is connected to one end of the limiting plate 162 away from the rotary encoder 130, and the other end of the limiting rod 164 is connected to the limiting component 160.

In this embodiment, the limiting component 160 mainly comprises a limiting plate 162 and a limiting rod 164, and one end of the limiting plate 162 is provided with a circular hole for the central shaft 132 to pass through. A plurality of through-holes have been seted up all around to the round hole, and the center of a plurality of through-holes can be located same circle, all uses the center of round hole to set up as the axle center, and a plurality of through-holes evenly distributed can be used to wear to establish fasteners such as screw through every through-hole and be connected with casing 134. The limiting plate 162 is provided with a notch 1622 at one end away from the round hole, a through notch 1622 of the limiting rod 164 penetrates through, and the limiting plate 162 is connected with the limiting rod 164. The one end that limiting rod 164 kept away from limiting plate 162 can be connected with fixed object to can restrict the displacement of limiting rod 162, make limiting rod 164 can cooperate limiting plate 162 to carry out spacingly, simple structure, reliable to rotary encoder 130.

Example 8

the stopper rod 164 includes: the screw 1642 penetrates through the sleeve 1642, and the screw 1644 is in threaded connection with the sleeve 1642; wherein, at least a part of the sleeve 1642 penetrates through the notch 1622, and one end of the screw 1644 far away from the notch 1622 is connected with the limiting component 160.

In this embodiment, the limiting rod 164 is mainly composed of a sleeve 1642 and a screw 1644. Wherein, one end of the sleeve 1642 is provided with an internal thread, the screw 1644 penetrates through the sleeve 1642, and the screw 1644 is in threaded connection with the sleeve 1642, the structure is simple, and the length of the screw 1644 can be finely adjusted. The one end accessible screw of screw rod 1644 is connected with limiting plate 162, and screw rod 1644 sets up realization such as threaded one end accessible nut and packing ring and is connected with fixed object, can improve the adaptability of gag lever post 164 to operational environment.

Example 9

As shown in fig. 18, the present embodiment provides a speed detection apparatus 100. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the speed detection apparatus 100 further includes: and the protective cover 170, wherein the protective cover 170 is sleeved outside the rotary encoder 130.

In this embodiment, in order to prevent the rotary encoder 130 from being damaged by the manual stepping on the rotary encoder 130, the protective cover 170 may be sleeved outside the rotary encoder 130. In addition, the shield 170 may also prevent rain erosion and improve overall aesthetics.

Example 10

As shown in fig. 20 and 21, the present embodiment provides a work vehicle 10 including: the speed detection device comprises a vehicle body 300, a telescopic assembly 200 and a speed detection device 100, wherein the telescopic assembly 200 comprises a turret 210 and telescopic legs 220, the telescopic legs 220 are connected with the turret 210 in a sliding mode, and the turret 210 is connected with the vehicle body 300; the speed detecting device 100 is used to detect the extension speed of the extendable leg 220 with respect to the turret 210.

In this embodiment, the working vehicle 10 may be a concrete pump truck, and the working vehicle 10 may specifically include a truck body 300 and a telescopic assembly 200. The telescoping assembly 200 may include, among other things, a turret 210 and a transverse telescoping leg 220. A slide is provided in the turret 210, and the extendable legs 220 are extendable and retractable along the slide. The speed detecting device 100 may be connected to the extendable leg 220 via the connecting flange 152, the screw 1644 may be connected to the turret 210, and the driving sprocket 1442 may be installed in the slide. Thereby enabling the speed detection apparatus 100 to detect the speed of the extendable leg 220. In addition, since the working vehicle 10 provided according to the embodiment of the present invention includes the speed detection device 100 according to any embodiment of the present invention, it has all the advantageous effects of the speed detection device 100 according to any embodiment of the present invention.

Example 11

As shown in fig. 8, 11 and 18, the present embodiment provides a speed detection apparatus 100 and a work vehicle 10, the work vehicle 10 is a concrete pump truck, the concrete pump truck is provided with a turret 210, a slide way is arranged in the turret 210, and a telescopic leg 220 is slidably connected with the turret 210 through the slide way. When the speed detection device 100 is installed, firstly, a chain 1444 for driving the telescopic leg 220 to extend is installed on the inner side of the slideway of the turret 210, the connecting flange 152 and the driving shaft 110 are fixed on the telescopic leg 220 according to the position of the chain 1444, two bearings are pressed on the connecting flange 152, the bearing outer ring 156 and the connecting flange 152 are in interference fit, the bearing outer ring 154 and the connecting flange are installed on the driving shaft 110 through the bearing inner ring 154, the two are also in interference fit, one end of the driving shaft 110 is connected with the central shaft 132 of the rotary encoder 130 through a fastening screw, the other end of the driving shaft 110 is fixed with the driving wheel 120 through riveting, and the installation position is such that the chain wheel and. Finally, the rotary encoder 130 is engaged with a limit rod 164 installed on the turret 210 through a bolt fixing limit plate 162 so as to limit the housing 134 of the rotary encoder 130 from rotating along with the central shaft 132. When the telescopic leg 220 is extended or retracted, the linear motion of the chain 1444 drives the driving wheel 120 to rotate, so that the extension length of the telescopic leg 220 can be continuously measured in real time.

Due to the adoption of the leg detection method shown in fig. 2 and 3, the following problems may occur:

1) the extension rate of the support leg 130' cannot be detected.

2) In the measurement process using the stay wire sensor, when the supporting leg moves, the stay wire 120' is easy to wear and tear, the failure rate is high, and the maintenance cost is high.

3) The pull wire sensor has higher requirement on installation precision, and the service life of the pull wire sensor is shortened when the installation error is larger.

4) The cost of the pull-cord sensor is high.

5) No specific structural form is specified.

When the leg detecting device 100 ″ of fig. 4 and 5 is used, the following disadvantages are present:

1) the horizontal leg inner frame 120 "can only be detected in a certain position, and the extension length of the leg cannot be measured continuously and in real time.

2) The detection device has the spring 140 'and the sliding block 150', so that the installation is difficult and the assembly efficiency is influenced.

3) The presence of the slider 150 "and the travel switch contact 160" in the detection device is subject to wear, no lubrication and damage to the travel switch contact.

4) The landing leg needs to be dismantled when detection device became invalid, has the maintenance difficulty.

In summary, in view of the above limitations, the present embodiment needs to solve the following problems:

1) and continuously detecting the extension amplitude of the supporting leg in real time.

2) How to arrange the leg extending amplitude detection device and the installation is convenient.

3) The reliability and the service life of the landing leg detection device.

4) The cost problem of the landing leg extension amplitude detection device is reduced.

5) The detection device is convenient to manufacture.

6) The detection device is convenient to maintain.

In this embodiment, the driving wheel 120 is fixedly connected to the rotary encoder 130 through the driving shaft 110 and the fastening screw, and when the driving wheel 120 rotates, the rotary encoder 130 also rotates. Fix rotary encoder 130 on telescopic component 200 through flange 152 and bearing, bearing inner circle 154 and drive shaft 110 interference fit simultaneously, bearing outer circle 156 and flange 152's inner wall interference fit, flange 152 fixes on telescopic component 200, has realized fixing rotary encoder 130 on telescopic component 200 and rotary encoder 130's center pin 132 can normally rotate. Because the central shaft 132 of the rotary encoder 130 rotates, the rotary encoder 130 itself also rotates, and then a limiting plate 162 is fixed on the rotary encoder 130, as shown in fig. 15, a U-shaped hole is formed in the limiting plate 162 and passes through a limiting rod 164 for limiting, so that the rotation of the rotary encoder 130 itself can be effectively limited. A protective cover 170 is added to the rotary encoder 130, so that the manual treading damage can be prevented, the rainwater erosion is prevented, and the overall attractiveness of the pump truck is improved. The overall structure is compact, the occupied space is small, and the reliability and the service life of the speed detection device 100 are improved. The speed detection device 100 is an assembly part, and is convenient to install and maintain. The efficiency of manufacturing, assembly and maintenance is improved. Fig. 22 is a schematic structural view showing an extended state of the extendable leg 220, and fig. 23 is a schematic structural view showing a retracted state of the extendable leg 220, and it can be known that the extendable leg 220 can be extended or retracted by the driving mechanism 140 as shown in fig. 22 and 23.

To sum up, according to the utility model discloses a beneficial effect of embodiment does:

1. by coupling rotary encoder 130 to drive shaft 110, the rotation of rotary encoder 130, and the telescoping of telescoping assembly 200 are combined, allowing for real-time, continuous measurement of the amplitude of telescoping assembly 200.

2. The linkage of the chain 1444 and the rotary encoder 130 is realized through the driving shaft 110, the bearing, the connecting flange 152 and the driving wheel 120, and the structural form of the linkage is low in requirements on manufacturing and mounting precision, high in fault tolerance rate and easy to realize.

3. The chain transmission occupies small space and has compact structure.

4. The chain 1444, the chain wheel, the driving shaft 110 and the fastening screw are used for transmission, so that the abrasion of structural parts is small, the service life is long, and the reliability is high.

5. Through increasing protection casing 170, can prevent that the people from trampling damage, rainwater from corroding etc. and promoted the whole aesthetic property of pump truck.

6. The use of the rotary encoder 130 is less costly than other pull wire sensors.

7. The speed detection device 100 is convenient to install and maintain and improves assembling and maintaining efficiency.

In embodiments in accordance with the present invention, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the embodiments according to the present invention can be understood by those of ordinary skill in the art as the case may be.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description according to the embodiments of the present invention, but do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the embodiments according to the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example in accordance with an embodiment of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment according to the embodiments of the present invention, and is not intended to limit the embodiments according to the present invention, and various modifications and variations may be made to the embodiments according to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments according to the present invention should be included in the protection scope of the embodiments according to the present invention.

Claims

1. A speed detecting device for detecting a speed of extension of a telescopic assembly, comprising:

the driving shaft is arranged on the telescopic assembly;

the driving wheel is arranged at one end of the driving shaft;

a rotary encoder provided at the other end of the drive shaft;

the driving mechanism is used for driving the driving wheel to drive the driving shaft to rotate and enabling the telescopic assembly to extend or retract;

wherein the rotary encoder has a central shaft connected to the drive shaft such that the central shaft rotates in synchronization with the drive shaft.

2. The speed detection device of claim 1, wherein the drive mechanism comprises:

a power mechanism;

and the transmission assembly is connected with the power mechanism and drives the driving wheel to rotate.

3. The speed sensing device of claim 2, wherein the transmission assembly comprises:

the driving chain wheel is connected with the power mechanism;

a chain connected between the drive sprocket and the drive wheel;

the driving wheel is a chain wheel, and the driving chain wheel and the driving wheel are respectively arranged on the telescopic assembly.

4. The speed detection device according to claim 1, further comprising:

the connecting structure is connected with the driving shaft in a rotating mode, and the connecting structure is fixedly connected with the telescopic assembly.

5. The speed sensing device of claim 4, wherein the connection structure comprises:

the connecting flange is sleeved outside the driving shaft;

the bearing inner ring is fixedly connected with the driving shaft;

the bearing outer ring is fixedly connected with the connecting flange;

wherein, flange is connected with telescopic component.

6. The speed detection device according to claim 1, further comprising:

a limiting component;

wherein, rotary encoder still includes the casing, the center pin rotate set up in the one end of casing, spacing subassembly with casing fixed connection is used for the restriction the rotation of casing.

7. The speed sensing device of claim 6, wherein the stop assembly comprises:

one end of the limiting plate is fixedly connected with the shell, and the other end of the limiting plate is provided with a notch;

and one end of the limiting rod is connected with one end of the limiting plate, which is far away from the rotary encoder, and the other end of the limiting rod is connected with the limiting component.

8. The speed detection device of claim 7, wherein the limit stop comprises:

a sleeve;

the screw rod penetrates through the sleeve and is in threaded connection with the sleeve;

wherein, at least a part of the sleeve penetrates through the notch, and one end of the screw rod, which is far away from the notch, is connected with the limiting component.

9. The speed detection device according to any one of claims 1 to 8, characterized by further comprising:

and the protective cover is sleeved outside the rotary encoder.

10. A work vehicle, characterized by comprising:

a vehicle body;

the telescopic assembly comprises a turret and telescopic legs, the telescopic legs are connected with the turret in a sliding mode, and the turret is connected with the trolley body;

the speed detection device according to any one of claims 1 to 9, for detecting an extension speed of the telescopic leg with respect to the turret.