Engineering machinery speed measuring device and engineering machinery

Abstract

The utility model belongs to the technical field of engineering machinery, and particularly relates to an engineering machinery speed measuring device and engineering machinery. The engineering machinery speed measuring device comprises a mounting seat; the rotating assembly comprises a first rotating mechanism and a second rotating mechanism which are rotationally connected, the first rotating mechanism is rotationally connected with the mounting base and suitable for rotating in the horizontal plane relative to the mounting base, and the second rotating mechanism is suitable for rotating in the vertical plane relative to the first rotating mechanism; the tachometer wheel assembly comprises a tachometer wheel and a tachometer, the tachometer wheel is connected with the end, away from the first rotating mechanism, of the second rotating mechanism, and the tachometer is arranged at the end, in the axial direction, of the tachometer wheel and used for detecting the rotating speed of the tachometer wheel. According to the utility model, the tachometer wheel can rotate in the horizontal plane and the vertical plane so as to be effectively matched with the steering operation of the engineering machinery and prevent sideslip, and the tachometer wheel is suitable for running on an undulating road surface, can effectively improve the tachometer accuracy of the engineering machinery, and is beneficial to realizing high-efficiency construction operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to an engineering machinery speed measuring device and engineering machinery. Background Art

[0002] At present, in common construction machinery, such as pavers, it is necessary to detect the travel speed of the traveling mechanism in real time during the construction process. In general, the travel speed can be calculated by detecting the rotation speed of the traveling wheel. However, for non-wheeled traveling mechanisms such as tracks, it is difficult to accurately detect the rotation speed. Usually, an additional tachometer wheel is provided to calculate the travel speed of the traveling mechanism by detecting the rotation speed of the tachometer wheel. However, the structure and assembly method of the tachometer wheel device in the prior art are relatively simple, and rigid assembly is performed directly. When the construction machinery is performing operations such as steering, the tachometer wheel is prone to side slipping, which leads to inaccurate speed measurement data, which is not conducive to the driver's precise driving operation and affects construction efficiency. Utility Model Content

[0003] In view of this, in order to improve at least one of the above problems existing in the prior art, the utility model provides a speed measuring device for engineering machinery and engineering machinery.

[0004] The first technical solution of the utility model provides an engineering machinery speed measuring device, including: a mounting seat; a rotating assembly, including a first rotating mechanism and a second rotating mechanism that are rotatably connected, the first rotating mechanism is rotatably connected to the mounting seat and is suitable for rotating in a horizontal plane relative to the mounting seat, and the second rotating mechanism is suitable for rotating in a vertical plane relative to the first rotating mechanism; a speed measuring wheel assembly, including a speed measuring wheel and a speed measuring device, the speed measuring wheel is connected to an end of the second rotating mechanism away from the first rotating mechanism, and the speed measuring device is arranged at one end of the speed measuring wheel in the axial direction, and is used to detect the rotation speed of the speed measuring wheel.

[0005] In a feasible implementation, the first rotating mechanism includes: a rotating platform, which is arranged below the mounting seat; a first rotating shaft, which is vertically inserted into the mounting seat and is rotatably connected to the mounting seat, and the bottom of the first rotating shaft is connected to the rotating platform; a first connecting seat, which is connected to the bottom of the rotating platform, and the first connecting seat is provided with a first pin shaft extending in the horizontal direction, and the second rotating mechanism is rotatably connected to the first pin shaft.

[0006] In a feasible implementation, the second rotating mechanism includes: a connecting arm, one end of which is rotatably connected to the first pin shaft, and the other end of which extends toward the tachometer wheel; a connecting groove structure, the connecting groove structure is through in the extension direction, and the open side faces the tachometer wheel, the connecting groove bottom plate of the connecting groove structure is connected to the connecting arm, the tachometer wheel is located in the connecting groove structure, and the two ends of the central rotating shaft of the tachometer wheel are respectively rotatably connected to the connecting groove side plates of the connecting groove structure.

[0007] In a feasible implementation, the first rotating mechanism also includes: a tensioning baffle, which is connected to the rotating platform and extends in the direction close to the tachometer wheel; the second rotating mechanism also includes: a tensioning mechanism, which is connected to the connecting arm and extends above the connecting arm, and an elastic member is provided on the tensioning mechanism, and one end of the elastic member is against the connecting arm, and the other end of the elastic member is against the tensioning baffle, and the elastic member is suitable for applying pressure to the connecting arm.

[0008] In a feasible implementation, a first through hole is provided on the tensioning baffle, the first through hole is a waist-shaped hole, and the extension direction of the long side of the first through hole is consistent with the extension direction of the connecting arm; the tensioning mechanism includes: a guide column, the bottom end of which is fixedly connected to the connecting arm, and the top end of the guide column passes through the first through hole; an elastic member, including a compression spring and a spring seat, the compression spring is sleeved on the guide column, the spring seat abuts against one end of the compression spring facing the tensioning baffle, and the spring seat abuts against the tensioning baffle.

[0009] In a feasible implementation, an external thread structure is provided on the guide column near the first through hole; the tensioning mechanism also includes: a locking nut, which is provided on the side of the tensioning baffle facing away from the connecting arm and is threadedly connected to the external thread structure, and the locking nut is suitable for abutting against the tensioning baffle.

[0010] In a feasible implementation, the engineering machinery speed measuring device also includes: a protective component, which is arranged in front of the movement direction of the speed measuring wheel, and the protective component includes a protective connection structure and a protective baffle, the protective connection structure is connected to the mounting seat, and the protective baffle is arranged opposite to the speed measuring wheel and connected to the protective connection structure.

[0011] In a feasible implementation, the protective baffle includes: a protective main baffle, located in front of the tachometer wheel, and the extension direction of the protective main baffle is consistent with the axial direction of the tachometer wheel; two protective side baffles, respectively connected to the two ends of the protective main baffle in the extension direction, and the two protective side baffles extend to the rear of the protective main baffle, and each protective side baffle is set at an obtuse angle to the protective main baffle.

[0012] In a feasible implementation, the mounting seat includes: a mounting main board, which is arranged in the horizontal direction, and is provided with a rotation center hole and a support bearing on the mounting main board, and the first rotating shaft is passed through the rotation center hole and connected to the support bearing; an mounting side plate, which is connected to one side of the mounting main board and is arranged in the vertical direction, and the mounting side plate is used to connect with the traveling mechanism of the engineering machinery.

[0013] In the second technical solution of the utility model, there is also provided an engineering machinery, comprising: a vehicle body, the vehicle body is provided with a traveling mechanism; the engineering machinery speed measuring device of any one of the above-mentioned first aspects is arranged on the side of the vehicle body, and the mounting seat of the engineering machinery speed measuring device is connected to the traveling mechanism.

[0014] The beneficial effects of the above technical solution of the utility model are embodied in:

[0015] The structure and connection method have been improved and optimized so that the speed measuring wheel can form a structure similar to a universal wheel. It can not only rotate in the horizontal plane, but also in the vertical direction. It can effectively adapt to the steering operation of engineering machinery and is suitable for driving on undulating roads. The reliability and applicability of the device are stronger, especially for engineering machinery with crawler travel mechanisms, such as pavers. It can effectively improve the speed measurement accuracy of engineering machinery, so that the driver can accurately perform driving operations and achieve efficient construction operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a three-dimensional schematic diagram of a speed measuring device for engineering machinery provided by an embodiment of the utility model.

[0017] Figure 2 Shown is a side schematic diagram of a speed measuring device for engineering machinery provided by an embodiment of the utility model.

[0018] Figure 3 The figure shows a rear view of a speed measuring device for engineering machinery provided by one embodiment of the utility model.

[0019] Figure 4 The figure shows a top view of a speed measuring device for engineering machinery provided by one embodiment of the utility model.

[0020] Figure 5 Shown is a partial cross-sectional view of a speed measuring assembly provided by an embodiment of the utility model.

[0021] Figure 6 Shown is a schematic diagram of a speed measuring wheel provided in one embodiment of the utility model.

[0022] Figure 7 The figure shows a cross-sectional view of a mounting base and a first rotating mechanism provided by an embodiment of the utility model from a side perspective.

[0023] Figure 8 Shown is a schematic block diagram of an engineering machinery provided by an embodiment of the utility model.

[0024] Fig. 9 The figure shows a schematic diagram of the assembly state of a speed measuring device and a traveling mechanism of an engineering machinery provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0025] In the description of the application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically limited. In the embodiment of the present application, all directional indications (such as up, down, left, right, front, back, top, bottom ...) are only used to explain the relative position relationship, motion conditions, etc. between the components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their deformations are intended to cover non-exclusive inclusions. For example, the process, method, system, product or equipment comprising a series of steps or units are not limited to the steps or units listed, but optionally also include the steps or units not listed, or optionally also include other steps or units inherent to these processes, methods, products or equipment.

[0026] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] Application Overview

[0029] At present, in the construction process of common engineering machinery, it is necessary to detect the travel speed of the travel mechanism in real time as a basis and reference for the driver's driving operation. Generally, the travel speed can be calculated by only detecting the rotation speed of the travel wheel, but for the travel mechanism with non-wheel structure such as crawler, due to the complex structure, it is difficult to accurately determine the travel speed by directly detecting the rotation speed.

[0030] In the prior art, a tachometer wheel is usually additionally provided so that the tachometer wheel moves synchronously with the traveling mechanism, and the traveling speed of the traveling mechanism is calculated by detecting the rotation speed of the tachometer wheel. However, the structure and assembly method of the tachometer wheel device in the prior art are usually relatively simple, and are rigidly assembled directly with the traveling mechanism only through a rigid connection structure. This structure can detect normally when the engineering machinery is normally traveling in a straight line, but when the engineering machinery is performing operations such as turning, the tachometer wheel is prone to side slip, which leads to inaccurate speed measurement data and difficulty in obtaining an accurate traveling speed, which is not conducive to the driver's accurate driving operation and affects the construction efficiency of the engineering machinery.

[0031] Therefore, it is necessary to improve and optimize the structure and assembly method of the existing speed measuring wheel device.

[0032] The following provides some embodiments of the engineering machinery speed measuring device and engineering machinery in the technical solution of the utility model.

[0033] In one embodiment of the first aspect of the present utility model, a construction machinery speed measuring device 100 is provided. Figure 1 and Figure 2 As shown, it includes a mounting seat 1, a rotating assembly 2 and a speed measuring wheel assembly 3. The mounting seat 1 serves as a supporting structure for the rotating assembly 2 and the speed measuring wheel assembly 3, and can be installed and fixed to the traveling mechanism of the engineering machinery. The rotating assembly 2 includes a first rotating mechanism 21 and a second rotating mechanism 22; the first rotating mechanism 21 is rotationally connected to the mounting seat 1, and the first rotating mechanism 21 can rotate in a horizontal plane relative to the mounting seat 1; the second rotating mechanism 22 is rotationally connected to the first rotating mechanism 21, and the second rotating mechanism 22 can rotate in a vertical plane relative to the first rotating mechanism 21. The speed measuring wheel assembly 3 includes a speed measuring wheel 31 and a speedometer 32, the speed measuring wheel 31 is connected to one end of the second rotating mechanism 22 away from the first rotating mechanism 21, and the speedometer 32 is connected to one end of the speed measuring wheel 31 in the axial direction; when the speed measuring wheel 31 rotates, the speedometer 32 can detect the rotation speed of the speed measuring wheel 31, and then calculate the traveling speed of the traveling mechanism according to the rotation speed of the speed measuring wheel 31.

[0034] After being installed on the engineering machinery, the speed measuring wheel 31 can move synchronously with the traveling mechanism of the engineering machinery; when the traveling mechanism is turning, the speed measuring wheel 31 can rotate in the horizontal plane driven by the first rotating mechanism 21 and the second rotating mechanism 22, so as to realize synchronous turning with the traveling mechanism, and the speed measuring wheel 31 can still rotate normally during the turning process, which can effectively prevent the side slip; and when the road surface is up and down, the speed measuring wheel 31 can also swing accordingly in the vertical plane driven by the second rotating mechanism 22 to adapt to the road surface conditions. The first rotating mechanism 21 and the second rotating mechanism 22 of the rotating assembly 2 can make the speed measuring wheel 31 form a form similar to a universal wheel.

[0035] Specifically, the speed detector 32 may be an encoder or other speed measuring elements.

[0036] The construction machinery speed measuring device 100 in this embodiment has improved and optimized its structure and connection method, so that the speed measuring wheel 31 can form a structure similar to a universal wheel, which can not only rotate in the horizontal plane, but also rotate in the vertical direction. It can effectively adapt to the steering operation of the construction machinery and is suitable for driving on uneven roads. The reliability and applicability of the device are stronger, and it is particularly suitable for construction machinery with a crawler travel mechanism, such as a paver, and can effectively improve the speed measurement accuracy of the construction machinery, so that the driver can accurately perform driving operations and achieve efficient construction operations.

[0037] It should be noted that the engineering machinery in this embodiment includes but is not limited to a paver, and the situation in the following embodiments is the same.

[0038] Furthermore, if Figure 1 and Figure 2 As shown, the first rotating mechanism 21 includes a rotating platform 211, a first rotating shaft 212 and a first connecting seat 213. The rotating platform 211, as a bearing structure of the first rotating mechanism 21, is arranged below the mounting seat 1; the first rotating shaft 212 is arranged vertically and penetrates the mounting seat 1, the bottom end of the first rotating shaft 212 is connected to the rotating platform 211, and the top of the first rotating shaft 212 is rotatably connected to the mounting seat 1, so that the rotating platform 211 can rotate with the first rotating shaft 212 relative to the mounting seat 1 in a horizontal plane; the first connecting seat 213 is arranged below the rotating platform 211 and connected to the bottom of the rotating platform 211, the first connecting seat 213 is provided with a first pin 2132, and the first pin 2132 extends in the horizontal direction, and the second rotating mechanism 22 is rotatably connected to the first pin 2132, so that the first rotating mechanism 21 can rotate around the first pin 2132, driving the speed measuring wheel 31 to swing in a vertical plane.

[0039] Furthermore, if Figures 1 to 3As shown, the second rotating mechanism 22 includes a connecting arm 221 and a connecting slot structure 222. One end of the connecting arm 221 is rotatably connected to the first pin 2132 of the first connecting seat 213, and the other end of the connecting arm 221 extends toward the rear of the mounting seat 1 in a direction close to the speed measuring wheel 31. The connecting slot structure 222 is a slot-shaped structure that penetrates in the extension direction, and the opening side of the connecting slot structure 222 faces the speed measuring wheel 31; the connecting slot bottom plate 2221 of the connecting slot structure 222 is connected and fixed to the connecting arm 221, and the two connecting slot side plates 2222 of the connecting slot structure 222 are respectively located on both sides of the speed measuring wheel 31 in the axial direction. Correspondingly, the speed measuring wheel 31 is located in the connecting slot structure 222, and the two ends of the central rotating shaft 311 of the speed measuring wheel 31 are rotatably connected to the two connecting slot side plates 2222 of the connecting slot structure 222, so that both ends of the speed measuring wheel 31 can be supported, and the force on the speed measuring wheel 31 and the central rotating shaft 311 is relatively uniform.

[0040] Specifically, Figure 5 In the example of FIG. 1 , corresponding connection holes and a speed measuring wheel bearing 312 may be provided on the two connection groove side plates 2222 of the connection groove structure 222 to connect the central rotating shaft 311 of the speed measuring wheel 31; in addition, as Figure 5 and Figure 6 In the example, a keyway structure 314 can be provided in the central axis hole of the speed measuring wheel 31, and a flat key structure 313 is correspondingly provided on the central rotating shaft 311, so that the connection between the central rotating shaft 311 and the speed measuring wheel 31 is fixed by the cooperation between the flat key structure 313 and the keyway structure 314.

[0041] Preferably, if Figure 2 In the example, the first connecting seat 213 can specifically adopt two relatively arranged vertical plate structures to fix the first pin shaft 2132; when the connecting arm 221 of the second rotating mechanism 22 is rotationally connected with the first pin shaft 2132, the vertical plate structure can also play an axial limiting role on the connecting arm 221.

[0042] In addition, it should be noted that the connecting groove structure 222 in the present embodiment is one of the preferred implementation methods of the second rotating mechanism 22. In practical applications, other structural forms can also be adopted according to assembly requirements. For example, the connecting arm 221 can also be connected to one end of the central rotating shaft 311 of the speed measuring wheel 31, which will not be repeated here.

[0043] In a further embodiment of the present invention, Figures 1 to 4As shown, the first rotating mechanism 21 further includes a tensioning baffle 214, and correspondingly, the second rotating mechanism 22 further includes a tensioning mechanism 223. The tensioning baffle 214 is connected to the rotating platform 211, and the tensioning baffle 214 extends toward the direction close to the speed measuring wheel 31, and the tensioning baffle 214 can rotate together with the rotating platform 211. The tensioning mechanism 223 is connected to the connecting arm 221, and the tensioning mechanism 223 extends upward from the connecting arm 221 and is arranged corresponding to the tensioning baffle 214; an elastic member 2232 is provided on the tensioning mechanism 223, one end of the elastic member 2232 is against the connecting arm 221, and the other end of the elastic member 2232 is against the tensioning baffle 214, so as to utilize the elastic force of the elastic member 2232 to apply pressure to the connecting arm 221, and transmit the pressure to the speed measuring wheel 31 through the connecting arm 221, so as to exert a downward pressure on the speed measuring wheel 31, so as to ensure that the speed measuring wheel 31 can always keep in contact with the road surface, realize the tensioning effect on the speed measuring wheel 31, and prevent the speed measuring wheel 31 from being separated from the road surface due to the ups and downs of the road surface, thereby affecting the normal speed measurement.

[0044] Furthermore, if Figure 3 and Figure 4 In the example, the tensioning baffle 214 is provided with a first through hole 2141, which is specifically in the form of a waist-shaped hole, and the long side extension direction of the first through hole 2141 is consistent with the extension direction of the connecting arm 221, so as to be compatible with the tensioning mechanism 223. The tensioning mechanism 223 specifically includes a guide column 2231 and an elastic member 2232; the bottom end of the guide column 2231 is fixedly connected to the connecting arm 221, specifically by welding or threaded connection, and the top end of the guide column 2231 passes through the first through hole 2141. When the connecting arm 221 swings in a vertical plane, the guide column 2231 can move in the first through hole 2141 along the long side extension direction to prevent the guide column 2231 and the tensioning baffle 214 from interfering with each other; the elastic member 2232 has The body includes a compression spring 2233 and a spring seat 2234. The compression spring 2233 is sleeved on the guide column 2231 to support and guide the compression spring 2233 through the guide column 2231. The spring seat 2234 abuts against one end of the compression spring 2233 toward the tensioning baffle 214, and the spring seat 2234 abuts against the tensioning baffle 214 to prevent the compression spring 2233 from extending into the first through hole 2141 through the spring seat 2234, so as to compress the compression spring 2233.

[0045] It can be understood that since the compression spring 2233 maintains a compressed state in the initial state and has a movement tendency to return to its original state, it can generate pressure on the connecting arm 221 to achieve a tensioning effect.

[0046] Furthermore, if Figure 2 and Figure 3In the example, the tensioning mechanism 223 also includes a locking nut 2235. Accordingly, an external thread structure is provided on the guide column 2231 near the first through hole 2141. The locking nut 2235 is located on the side of the tensioning baffle 214 facing away from the connecting arm 221, and forms a threaded fit with the external thread structure of the guide column 2231 to achieve a threaded connection with the guide column 2231. The compression degree of the compression spring 2233 can be adjusted by operating the locking nut 2235. When the engineering machinery is in a non-operating state such as a transfer, the connecting arm 221 and the speed measuring wheel 31 can be locked by the locking nut 2235 to separate the speed measuring wheel 31 from the road surface to reduce wear. The size of the locking nut 2235 is adapted to the width of the first through hole 2141.

[0047] In practical applications, such as Figure 2 In the example, a gasket structure can be set between the locking nut 2235 and the tensioning baffle 214 to facilitate the tightening and loosening operations of the locking nut 2235; in addition, the spring seat 2234 can also adopt a gasket structure to support and limit the compression spring 2233.

[0048] In a further embodiment of the present invention, Figures 1 to 4 As shown, the engineering machinery speed measuring device 100 further includes a protection component 4. The protection component 4 is arranged in front of the moving direction of the speed measuring wheel 31, and specifically includes a protection connection structure 41 and a protection baffle 42; the protection connection structure 41 is connected to the mounting seat 1, and the protection baffle 42 is connected and fixed to the protection connection structure 41, and is arranged opposite to the speed measuring wheel 31. During driving, the protection baffle 42 can block obstacles in front of the speed measuring wheel 31, such as filling materials and stones spilled on the road surface when the paver is operating, so as to protect the speed measuring wheel 31, thereby reducing the wear of the speed measuring wheel 31 and helping to extend the service life.

[0049] Furthermore, if Figures 1 to 4 As shown, the protection component 4 includes a protection main baffle 421 and a protection side baffle 422; the protection main baffle 421 is located in front of the speed measuring wheel 31, and the extension direction of the protection main baffle 421 is consistent with the axial direction of the speed measuring wheel 31; a protection side baffle 422 is respectively provided at both ends of the protection main baffle 421 in the extension direction, and the two protection side baffles 422 both extend to the rear of the protection main baffle 421, and each protection side baffle 422 is set at an obtuse angle to the protection main baffle 421, that is, in the direction from right front to rear, the two protection side baffles 422 gradually open to both sides of the speed measuring wheel 31 to form a trumpet-like structure; the obstacles in front of the speed measuring wheel 31 can be guided to both sides of the speed measuring wheel 31, so that the obstacles are as far away from the speed measuring wheel 31 as possible, which can further enhance the protection effect.

[0050] Specifically, the protective side baffle 422 and the protective main baffle 421 can be an integrally formed structure or a split structure, and can be connected as a whole by welding or the like. In addition, the protective baffle 42 can be set to a single-layer structure or a multi-layer structure according to actual protection needs, for example Figure 4 The double-layer baffle structure shown in FIG.

[0051] In a further embodiment of the present invention, Figures 2 to 4 as well as Figure 7 As shown, the mounting seat 1 includes a mounting main board 11 and a mounting side plate 12. The mounting main board 11 is arranged in the horizontal direction, and the mounting side plate 12 is arranged on the side of the mounting main board 11 in the vertical direction and connected to the mounting main board 11. The mounting side plate 12 is provided with a connecting hole, and can be installed and fixed with the traveling mechanism of the engineering machinery through the mounting side plate 12 during assembly. Among them, the mounting main board 11 is provided with a rotation center hole 111 and a support bearing 112, and the first rotating shaft 212 is penetrated in the rotation center hole 111, and is rotatably connected with the mounting main board 11 through the support bearing 112.

[0052] In practical applications, such as Figure 7 In the example in FIG. 1 , a bearing seat 114 may be provided in the rotation center hole 111 to fix the support bearing 112; a connecting flange 113 may be provided on the top of the bearing seat 114, and the first rotating shaft 212 may be passed through the connecting flange 113 to axially limit the first rotating shaft 212. In addition, according to the strength requirements, a reinforcing plate 13 may be provided between the mounting main plate and the mounting side plate 12 to improve the connection strength.

[0053] In an embodiment of the second aspect of the present utility model, a construction machine 500 is provided. Figures 1 to 8 As shown, the engineering machinery 500 includes a vehicle body 510 and the engineering machinery speed measuring device 100 in any embodiment of the first aspect. The vehicle body 510 is provided with a traveling mechanism 520, such as Fig. 9 In the crawler-type traveling mechanism shown in FIG, the engineering machinery speed measuring device 100 is arranged on the side of the vehicle body 510 , and the mounting seat 1 of the engineering machinery speed measuring device 100 is connected to the traveling mechanism 520 , so that the speed measuring wheel 31 can travel synchronously with the traveling mechanism 520 .

[0054] Among them, when the traveling mechanism 520 performs a steering operation, the speed measuring wheel 31 can be turned synchronously under the action of the first rotating mechanism 21 and the second rotating mechanism 22 of the rotating assembly 2, so as to prevent side slip; when the road surface is undulating, the speed measuring wheel 31 can also swing in a vertical plane under the action of the second rotating mechanism 22 to adapt to the road conditions.

[0055] It should be noted that the engineering machinery 500 in this embodiment includes but is not limited to a paver, and the traveling mechanism 520 includes but is not limited to Fig. 9 The crawler-type traveling mechanism shown in FIG.

[0056] In addition, the engineering machinery 500 in this embodiment also has all the beneficial effects of the engineering machinery speed measuring device 100 in any embodiment of the first aspect mentioned above, which will not be repeated here.

[0057] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0058] The block diagrams of the devices, apparatuses, equipment and systems involved in the present utility model are only illustrative examples and are not intended to require or imply that they must be connected, arranged and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment and systems can be connected, arranged and configured in any manner. Words such as "including", "comprising", "having" and the like are open words, referring to "including but not limited to" and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to" and can be used interchangeably with them. It should also be noted that in the apparatus and equipment of the present utility model, each component can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present utility model.

[0059] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize some variations, modifications, changes, additions and sub-combinations thereof. The above description of the disclosed aspects is provided to enable any technician in the field to make or use the utility model. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the utility model. Therefore, the utility model is not intended to be limited to the aspects shown herein, but in accordance with the widest range consistent with the principles and novel features of this utility model.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A speed measuring device for engineering machinery, characterized in that: include: Mounting seat (1); A rotating assembly (2), comprising a first rotating mechanism (21) and a second rotating mechanism (22) which are rotatably connected, wherein the first rotating mechanism (21) is rotatably connected to the mounting seat (1) and is suitable for rotating in a horizontal plane relative to the mounting seat (1), and the second rotating mechanism (22) is suitable for rotating in a vertical plane relative to the first rotating mechanism (21); The tachometer wheel assembly (3) comprises a tachometer wheel (31) and a tachometer (32); the tachometer wheel (31) is connected to an end of the second rotating mechanism (22) away from the first rotating mechanism (21); the tachometer (32) is arranged at an axial end of the tachometer wheel (31) and is used to detect the rotation speed of the tachometer wheel (31).

2. The engineering machinery speed measuring device according to claim 1, characterized in that: The first rotating mechanism (21) comprises: A rotating platform (211) is disposed below the mounting seat (1); A first rotating shaft (212) is vertically inserted into the mounting seat (1) and is rotatably connected to the mounting seat (1); the bottom of the first rotating shaft (212) is connected to the rotating platform (211); The first connecting seat (213) is connected to the bottom of the rotating platform (211), and the first connecting seat (213) is provided with a first pin shaft (2132) extending in the horizontal direction, and the second rotating mechanism (22) is rotationally connected to the first pin shaft (2132).

3. The engineering machinery speed measuring device according to claim 2, characterized in that: The second rotating mechanism (22) comprises: A connecting arm (221), one end of which is rotatably connected to the first pin shaft (2132), and the other end of which extends toward the speed measuring wheel (31); A connecting groove structure (222), the connecting groove structure (222) is through in the extension direction, and the opening side faces the speed measuring wheel (31), the connecting groove bottom plate (2221) of the connecting groove structure (222) is connected to the connecting arm (221), the speed measuring wheel (31) is located in the connecting groove structure (222), and the two ends of the central rotating shaft (311) of the speed measuring wheel (31) are respectively rotatably connected to the connecting groove side plates (2222) of the connecting groove structure (222).

4. The engineering machinery speed measuring device according to claim 3, characterized in that: The first rotating mechanism (21) further comprises: A tension baffle (214) connected to the rotating platform (211) and extending in a direction close to the speed measuring wheel (31); The second rotating mechanism (22) further comprises: The tensioning mechanism (223) is connected to the connecting arm (221) and extends upward from the connecting arm (221). An elastic member (2232) is provided on the tensioning mechanism (223), and one end of the elastic member (2232) abuts against the connecting arm (221), and the other end of the elastic member (2232) abuts against the tensioning baffle (214). The elastic member (2232) is suitable for applying pressure to the connecting arm (221).

5. The engineering machinery speed measuring device according to claim 4, characterized in that: The tension baffle (214) is provided with a first through hole (2141), the first through hole (2141) is a waist-shaped hole, and the long side extension direction of the first through hole (2141) is consistent with the extension direction of the connecting arm (221); The tensioning mechanism (223) comprises: A guide column (2231), the bottom end of which is fixedly connected to the connecting arm (221), and the top end of the guide column (2231) passes through the first through hole (2141); The elastic member (2232) comprises a compression spring (2233) and a spring seat (2234); the compression spring (2233) is sleeved on the guide column (2231); the spring seat (2234) abuts against one end of the compression spring (2233) facing the tensioning baffle (214); and the spring seat (2234) abuts against the tensioning baffle (214).

6. The engineering machinery speed measuring device according to claim 5, characterized in that: An external thread structure is provided on the guide column (2231) at a position close to the first through hole (2141); The tensioning mechanism (223) further comprises: The locking nut (2235) is arranged on the side of the tensioning baffle (214) facing away from the connecting arm (221) and is threadedly connected to the external thread structure, and the locking nut (2235) is suitable for abutting against the tensioning baffle (214).

7. The engineering machinery speed measuring device according to any one of claims 1 to 6, characterized in that: Also includes: A protection component (4) is arranged in front of the moving direction of the speed measuring wheel (31), and the protection component (4) comprises a protection connection structure (41) and a protection baffle (42). The protection connection structure (41) is connected to the mounting seat (1), and the protection baffle (42) is arranged opposite to the speed measuring wheel (31) and connected to the protection connection structure (41).

8. The engineering machinery speed measuring device according to claim 7, characterized in that: The protective baffle (42) comprises: A protective main baffle (421) is located in front of the speed measuring wheel (31), and an extending direction of the protective main baffle (421) is consistent with an axial direction of the speed measuring wheel (31); The two protective side baffles (422) are respectively connected to the two ends of the protective main baffle (421) in the extension direction. The two protective side baffles (422) extend toward the rear of the protective main baffle (421), and each protective side baffle (422) is arranged at an obtuse angle to the protective main baffle (421).

9. The engineering machinery speed measuring device according to any one of claims 2 to 6, characterized in that: The mounting seat (1) comprises: The mounting main board (11) is arranged in a horizontal direction, the mounting main board (11) is provided with a rotation center hole (111) and a support bearing (112), the first rotating shaft (212) is passed through the rotation center hole (111) and is connected to the support bearing (112); The mounting side plate (12) is connected to one side of the mounting main plate (11) and is arranged vertically. The mounting side plate (12) is used to be connected to a traveling mechanism (520) of an engineering machine.

10. An engineering machine, characterized in that: include: A vehicle body (510), wherein the vehicle body (510) is provided with a traveling mechanism (520); The engineering machinery speed measuring device according to any one of claims 1 to 9 is arranged on the side of the vehicle body (510), and the mounting seat (1) of the engineering machinery speed measuring device is connected to the traveling mechanism (520).

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