CN210180655U - Camshaft test equipment - Google Patents
Camshaft test equipment Download PDFInfo
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- CN210180655U CN210180655U CN201921216814.3U CN201921216814U CN210180655U CN 210180655 U CN210180655 U CN 210180655U CN 201921216814 U CN201921216814 U CN 201921216814U CN 210180655 U CN210180655 U CN 210180655U
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- 238000012360 testing method Methods 0.000 title claims abstract description 55
- 210000004907 gland Anatomy 0.000 claims abstract description 13
- 238000006073 displacement reaction Methods 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000003068 static effect Effects 0.000 description 14
- 239000000306 component Substances 0.000 description 10
- 238000013461 design Methods 0.000 description 8
- 238000003825 pressing Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000036316 preload Effects 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model discloses a camshaft test device, which comprises a base, a loading device arranged on the base, a supporting device used for supporting a camshaft and a driving device used for driving the camshaft to rotate; the loading device comprises a bracket, a loading swing arm assembly matched with a cam on the cam shaft and a preloading assembly matched with the loading swing arm assembly; the loading swing arm assembly comprises a swing arm and an identification plate vertically arranged in the middle of the swing arm, rollers are arranged at two ends of the swing arm, a vertical plate is arranged on the support, and the middle of the swing arm is rotatably connected to the vertical plate; the preloading assembly comprises a shell, a gland positioned above the shell, an elastic piece, an upper spring seat and a lower spring seat, wherein the elastic piece, the upper spring seat and the lower spring seat are positioned in a space formed between the shell and the gland, the upper end of the elastic piece acts on the upper spring seat, and the lower end of the elastic piece acts on the lower spring seat.
Description
Technical Field
The utility model belongs to the technical field of machinery, concretely relates to camshaft test equipment.
Background
The camshaft is a core component in the diesel generator for nuclear power emergency, controls the opening and closing of a crankshaft air valve through the rotation of cams with different phase angles, provides fresh air necessary for combustion for the diesel generator, rotates at a high speed in the diesel generator, and has the highest rotation speed of 750 rpm. Under the rotating speed, the cam is impacted by the circulating acting force from the valve spring and the combustion cylinder, the cam surface of the cam shaft is easy to generate contact fatigue wear, high temperature is easy to generate between the shaft neck of the cam shaft and the bearing bush, the service life of the cam shaft is shortened, and the integral stability and the reliability of the diesel generator are further influenced.
The existing nuclear power emergency diesel generator is an imported product which is originally installed abroad, and the camshaft is 2.4m long, 76mm in diameter and slender. The production process, materials and tests of the test stand have no referent mark post products in China, so that the development of a special test stand is necessary for testing the fatigue and the wear resistance of the cam and the shaft neck of the large camshaft for the nuclear power emergency diesel generator which is self-researched, developed and manufactured.
In the prior art, as in the chinese patent application No.: 201620850696.1, patent name: the invention discloses an invention patent of a wear test device for a camshaft and a tappet of a diesel engine, wherein the technical scheme has the following defects: 1. the mechanical structure is a closed structure, cannot adapt to the replacement of various camshaft test pieces, and needs to develop a test tool for each test camshaft with different lengths; 2. the testing pre-pressure of the cam can be changed only by replacing the spring, and the magnitude of the pre-pressure cannot be accurately measured 3, and the magnitude of the dynamic loading force of the cam in the rotation process under the condition of applying the rated pre-pressure cannot be tested.
Disclosure of Invention
In view of this, in order to overcome the defects of the prior art, the utility model aims at providing a camshaft test equipment, it can be applicable to the camshaft of different specifications, the static precompression of regulation that can be very convenient and monitoring dynamic loading power.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a camshaft test device comprises a base, a loading device arranged on the base, a supporting device used for supporting a camshaft and a driving device used for driving the camshaft to rotate; the loading device comprises a bracket, a loading swing arm assembly matched with a cam on the cam shaft and a preloading assembly matched with the loading swing arm assembly, wherein the loading swing arm assembly is positioned between the cam and the preloading assembly; the loading swing arm assembly comprises a swing arm and an identification plate vertically arranged in the middle of the swing arm, rollers are arranged at two ends of the swing arm, the rollers comprise a first roller matched with the preloading assembly and a second roller matched with the cam, a vertical plate is arranged on the support, the middle of the swing arm is rotatably connected to the vertical plate, and a distance meter corresponding to the identification plate is arranged on the support; the preloading assembly comprises a shell, a gland positioned above the shell, an elastic piece, an upper spring seat and a lower spring seat, wherein the elastic piece and the upper spring seat are positioned in a space formed between the shell and the gland, the upper end of the elastic piece acts on the upper spring seat, the lower end of the elastic piece acts on the lower spring seat, the lower end of the lower spring seat penetrates through the bottom surface of the shell and is matched with the first roller, and the preloading assembly further comprises an adjusting mechanism used for adjusting the compression amount of the elastic piece.
Preferably, the adjusting mechanism comprises a tightening screw rod acting on the upper end of the upper spring seat, and the upper end of the tightening screw rod penetrates through the gland and extends outwards. The jacking screw rod is connected with the gland through threads, the position of the upper spring seat is adjusted by adjusting the upper end of the jacking screw rod, the compression amount of the elastic part is adjusted, and the size of the static pre-pressure is adjusted. The static pre-pressure can be realized by simply adjusting the jacking screw without replacing the pre-pressure spring, and the adjustment of the pre-pressure can be visually and efficiently expressed by the displacement mechanism.
Preferably, the preloading assembly further comprises a displacement mechanism for measuring the position of the upper spring seat, the displacement mechanism comprises a movable rod fixed on the upper spring seat and a pull rope sensor arranged on the support, a movable groove for the movable rod to move up and down is formed in the housing, a pull rope is connected between the pull rope sensor and the movable rod, a pull rope hole for the pull rope to pass through is further formed in the press cover, and the moving direction of the movable rod is parallel to the moving direction of the upper spring seat. The position of the upper spring seat can be adjusted through the jacking screw rod, so that the compression amount of the spring is adjusted, and the pre-tightening force is adjusted. In some embodiments, the movable rod comprises a connecting rod connected to the upper spring seat and a fixed rod connected to the connecting rod, and the two ends of the extension are connected to the pull rope sensor and the fixed rod respectively. The fixed rod is driven to move by the movement of the upper spring seat, the pull rope is pulled, the downward pressing stroke of the elastic piece can be accurately measured through the pull rope sensor, and the static pre-pressure on each cam can be obtained according to the downward pressing stroke of the spring.
Preferably, the swing arm has clamping plates at both ends thereof, a rolling opening for accommodating the roller is formed between the two clamping plates on the same side, the roller is mounted on the clamping plates, and the diameter of the roller is larger than the height of the clamping plates at the roller mounting position. The diameter of the roller is larger than the height of the clamping plate at the corresponding position, so that the cam can not touch the swing arm when the test equipment runs, even if the length of the roller is smaller than the thickness of the cam.
Preferably, the distance measuring instrument is installed on one side of the support far away from the second roller, the distance measuring instrument is used for measuring the distance of the identification plate swinging from the vertical direction to the direction of the first roller, and the support is provided with a corresponding distance measuring hole. The distance measuring instrument adopts a laser displacement sensor. When the camshaft begins to rotate, the cam top can drive the swing arm and push down with the one end of cam contact, and then drive the recognition board and swing backward, the swing arm can upwards compress the elastic component through lower spring holder with the one end of preloading subassembly contact, the terminal swing arm that rotates the cam when the camshaft receives the tension effect of preloading subassembly spring, the swing arm is pushed down with the one end of preloading subassembly contact, and then drive the recognition board and swing forward, through the dynamic change of this recognition board fore-and-aft position of laser displacement sensor control, just can obtain the change of the size of the loading force that the camshaft received on every cam when rotating. For traditional adoption force sensor's test method, the utility model discloses what adopt is that non-contact's laser displacement sensor cooperation is acquireed the board and is tested, and the result is stable accurate, and can effectually use for a long time.
Preferably, a temperature measuring device for measuring the temperature of the camshaft is mounted on the bracket. The temperature measuring device is preferably mounted and monitored corresponding to the camshafts on both sides of the support device.
Preferably, drive arrangement includes the motor and sets up universal joint between motor and the camshaft, the coaxial setting of output shaft, universal joint and the camshaft of motor drives universal joint and camshaft synchronous rotation through the motor. The motor and the universal coupling are installed and connected through conventional components such as a flange plate, a flat key, a bearing seat, a bolt, a nut and the like.
Preferably, the supporting device comprises a plurality of bearing seats fixed on the base, the cam shaft is rotatably arranged in the bearing seats, and the loading device is correspondingly arranged between the adjacent bearing seats. The design of the open bearing seat is adopted, the position of the bearing seat can be adjusted at will according to large camshafts with different lengths, the camshafts with different lengths can be guaranteed to be carried out on the test bed, and the test cost is saved.
More preferably, the base is provided with a sliding groove extending along the length direction of the camshaft, and the support and the lower part of the bearing seat are arranged in the sliding groove in a matched mode. The design of spout also can further cooperate the removal of bearing frame and loading device, and the spout sets up for the T type of invering, can set up the bolt assembly who corresponds with the spout in the below of loading device and bearing frame, realizes the removal of loading device and bearing frame through spout and the bolt assembly who corresponds to adapt to the camshaft of different specifications.
The static pre-pressure refers to the pre-pressure obtained by manually adjusting the downward pressing displacement stroke of a loading spring in a loading mechanism according to requirements before the camshaft operates so as to realize the pre-compression state of the roller and the curved surface of the cam; the dynamic loading force refers to the pressure response of a loading structure to the phase change of the cam when the cams are in different phases in the rotation process of the camshaft on the basis of the static pre-pressure. The utility model discloses in through adjusting static precompression and dynamic loading power, can simulate different specification camshafts state of active service, test camshaft's stability.
Compared with the prior art, the utility model discloses an useful part lies in: the camshaft test equipment of the utility model has reasonable structural design, adopts an open structure, can adapt to the large camshafts with different lengths to test on the test equipment, and saves the test cost; the static pre-pressure is realized by adjusting the jacking screw rod without replacing the elastic part; the dynamic loading is monitored by matching the distance measuring instrument with the identification plate, and compared with the traditional test method adopting a force sensor, the method is more efficient and stable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a perspective view of a camshaft testing apparatus in a preferred embodiment of the present invention;
FIG. 2 is a side view of a camshaft testing apparatus in a preferred embodiment of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
fig. 4 is a perspective view of a first viewing angle of a loading device in a camshaft testing apparatus according to a preferred embodiment of the present invention;
fig. 5 is a perspective view of a second viewing angle of a loading device in the camshaft test apparatus according to the preferred embodiment of the present invention;
FIG. 6 is a cross-sectional view of a preload assembly in a camshaft testing apparatus in accordance with a preferred embodiment of the present invention;
FIG. 7 is a cross-sectional view of a loaded rocker arm assembly in a camshaft test apparatus in accordance with a preferred embodiment of the present invention;
FIG. 8 is a top view of a loaded swing arm assembly in a camshaft testing apparatus in accordance with a preferred embodiment of the present invention;
wherein: the device comprises a camshaft-1, a cam-101, a base-2, a chute-201, a bearing seat-3, a driving device-4, a motor-401, a motor base-402, a universal coupling-403, a loading device-5, a bracket-51, a loading swing arm assembly-52, a swing arm-521, an identification plate-522, a first roller-523, a second roller-524, a rotating shaft-525, an upper oil baffle-526, a lower oil baffle-527, a pin shaft-528, a preloading assembly-53, a shell-531, a gland-532, an elastic member-533, an upper spring seat-534, a lower spring seat-535, a jacking screw-536, a connecting rod-537, a fixed rod-538, a movable groove-539, a vertical plate-54 and a distance meter-55, temperature measuring device-56, pull rope sensor-57, clamping plate-61, rolling port-62, bolt assembly-7, protective cover-8, motor protective cover-9, flat key-10, flange-11, bearing-12, pull rope hole-13 and distance measuring hole-14.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Referring to fig. 1 to 8, the camshaft 1 testing apparatus of the present embodiment includes a base 2, a loading device 5 disposed on the base 2, a supporting device for supporting the camshaft 1, and a driving device 4 for driving the camshaft 1 to rotate. The base 2 is also provided with a protective cover 8 which covers the camshaft 1 and the loading device 5.
The supporting device comprises a plurality of bearing blocks 3 fixed on the base 2, the camshaft 1 is rotatably arranged in the bearing blocks 3, and the loading device 5 is correspondingly arranged between the adjacent bearing blocks 3. By adopting the design of the open bearing seat 3, the position of the bearing seat 3 can be adjusted at will according to the large-scale camshafts 1 with different lengths, the camshafts 1 with different lengths can be ensured to be carried out on the test bench, and the test cost is saved.
As shown in fig. 1-3, the driving device 4 includes a motor 401 and a universal joint 403 disposed between the motor 401 and the camshaft 1, an output shaft of the motor 401, the universal joint 403 and the camshaft 1 are coaxially disposed, and the motor 401 drives the universal joint 403 and the camshaft 1 to synchronously rotate. The motor 401 and the universal coupling 403 are connected through conventional components such as a flange 11, a flat key 10, a bearing seat 3, a bolt component 7 and the like. A motor protective cover 9 is arranged at the position where the motor 401 is connected with the universal joint 403.
The base 2 is provided with a sliding groove 201 extending along the length direction of the camshaft 1, and the loading device 5 and the bearing seat 3 are arranged in the sliding groove 201 in a matching mode below. The design of spout 201 also can further cooperate the removal of bearing frame 3 and loading device 5, and spout 201 is the T type setting of invering, can set up the bolt assembly 7 that corresponds with spout 201 in the below of loading device 5 and bearing frame 3, realizes the removal of loading device 5 and bearing frame 3 through spout 201 and the bolt assembly 7 that corresponds to adapt to the camshaft 1 of different specifications.
As shown in fig. 4 to 8, the loading device 5 includes a bracket 51, a loading swing arm assembly 52 matching with a cam 101 on the camshaft 1, and a preload assembly 53 interworking with the loading swing arm assembly 52, the loading swing arm assembly 52 being located between the cam 101 and the preload assembly 53.
The loading swing arm assembly 52 comprises a swing arm 521 and a recognition plate 522 vertically arranged at the middle position of the swing arm 521, rollers are arranged at two ends of the swing arm 521, the rollers comprise a first roller 523 matched with the preloading assembly 53 and a second roller 524 matched with the cam 101, a vertical plate 54 is arranged on the support 51, the middle position of the swing arm 521 is rotatably connected to the vertical plate 54, and a distance meter 55 corresponding to the recognition plate 522 is arranged on the support 51.
The swing arm 521 is provided with clamping plates 61 at two ends, a rolling port 62 for accommodating a roller is formed between the two clamping plates 61 on the same side, the roller is installed on the clamping plates 61 through a pin 528, the diameter of the roller is larger than the height of the clamping plates 61 at the installation position of the roller, and the cam 101 can be ensured not to touch the swing arm 521 when the test equipment runs, even if the length of the roller is smaller than the thickness of the cam 101.
The distance measuring instrument 55 is installed on one side of the bracket 51 far away from the second roller 524, the distance measuring instrument 55 is used for measuring the swing distance of the identification plate 522 from the vertical direction to the first roller 523, and the bracket 51 is provided with a corresponding distance measuring hole 14. The distance meter 55 is a laser displacement sensor. When the camshaft 1 starts to rotate, the top end of the cam 101 can drive one end, contacting with the cam 101, of the swing arm 521 to be pressed downwards, so that the recognition plate 522 is driven to swing backwards, one end, contacting with the preloading component 53, of the swing arm 521 can compress the elastic element 533 upwards through the lower spring seat 535, when the camshaft 1 rotates to the tail end of the cam 101, the swing arm is under the tension action of the spring of the preloading component 53, one end, contacting with the preloading component 53, of the swing arm 521 is pressed downwards, so that the recognition plate 522 is driven to swing forwards, dynamic changes of the front position and the rear position of the recognition plate 522 are monitored through the laser displacement sensor, and changes of loading force on each cam 101 when the camshaft 1 rotates can be obtained. Compared with the traditional test method adopting a force sensor, the non-contact type laser displacement sensor adopted by the embodiment is matched with the identification plate 522 for testing, the result is stable and accurate, and the method can be effectively used for a long time.
The preload assembly 53 includes a housing 531, a gland 532 located above the housing 531, an elastic member 533 and an upper spring seat 534 located in a space formed between the housing 531 and the gland 532, a lower spring seat 535, an adjusting mechanism for adjusting a compression amount of the elastic member 533, and a displacement mechanism for measuring a position of the upper spring seat 534, an upper end of the elastic member 533 acts on the upper spring seat 534, a lower end of the elastic member 533 acts on the lower spring seat 535, and a lower end of the lower spring seat 535 penetrates through a bottom surface of the housing 531 and cooperates with the first roller 523. That is, the first roller 523 is located below the lower spring seat 535, and the second roller 524 is located below the camshaft 1. The oscillating surface of the oscillating arm 521 is perpendicular to the extending direction of the camshaft 1. The elastic member 533 in this embodiment is a spring, and the bottom surface of the upper spring seat 534 and the top surface of the upper spring seat 534 are both provided with a limiting groove matched with the spring.
The adjusting mechanism includes a tightening screw 536 acting on the upper end of the upper spring seat 534, and the upper end of the tightening screw 536 extends through the cover 532 and protrudes outward. The tightening screw 536 is connected with the gland 532 through threads, the upper end of the tightening screw 536 is adjusted to further adjust the position of the upper spring seat 534, the compression amount of the elastic member 533 is adjusted, and the magnitude of the static pre-pressure is adjusted. The static pre-pressure can be realized by simply adjusting the jacking screw 536 without replacing the pre-pressure spring, and the adjustment of the pre-pressure can be visually and efficiently expressed by the displacement mechanism.
The displacement mechanism comprises a movable rod fixed on the upper spring seat 534 and a pull rope sensor 57 arranged on the support 51, a movable groove 539 for the movable rod to move up and down is formed in the shell 531, a pull rope is connected between the pull rope sensor 57 and the movable rod, a pull rope hole 13 for the pull rope to pass through is further formed in the gland 532, and the moving direction of the movable rod is parallel to the moving direction of the upper spring seat 534. The position of the upper spring seat 534 can be adjusted through the jacking screw 536, and then the compression amount of the spring is adjusted, so that the adjustment of the pretightening force is realized. In this embodiment, the movable rod includes a connecting rod 537 connected to the upper spring seat 534 and a fixed rod 538 connected to the connecting rod 537, and both ends of the movable rod are connected to the pull rope sensor 57 and the fixed rod 538, respectively. The fixed rod 538 is driven to move by the movement of the upper spring seat 534, the pull rope is pulled, the downward pressing stroke of the elastic element 533 can be accurately measured through the pull rope sensor 57, and the static pre-pressure on each cam 101 can be obtained according to the downward pressing stroke of the spring.
In the present embodiment, a temperature measuring device 56 for measuring the temperature of the camshaft 1 is also mounted on the bracket 51. The temperature measuring device 56 is preferably installed and monitored corresponding to the camshaft 1 on both sides of the support device so that the test apparatus can measure more extensive data.
The operation of the camshaft 1 test apparatus of the present embodiment is briefly described as follows:
firstly, a loading device 5 and a supporting device are installed according to the specification of the camshaft 1 to be tested, and the camshaft 1 is installed on a bearing block 3 and connected with a universal coupling 403.
The tightening screw 536 is adjusted according to the specification of the camshaft 1 to drive the upper spring seat 534 to move, so as to adjust the compression amount of the elastic member 533 and adjust the magnitude of the static pre-pressure. And the fixed rod 538 is driven by the movement of the upper spring seat 534 to move, the pull rope is pulled, the downward pressing stroke of the elastic element 533 can be accurately measured through the pull rope sensor 57, and the static pre-pressure on each cam 101 can be obtained according to the downward pressing stroke of the spring.
The motor 401 is started, the camshaft 1 is driven to rotate through the universal coupling 403, the top end of the cam 101 can drive one end, contacting with the cam 101, of the swing arm 521 to be pressed downwards, the recognition plate 522 is driven to swing backwards, one end, contacting with the preloading component 53, of the swing arm 521 can compress the elastic piece 533 upwards through the lower spring seat 535, when the camshaft 1 rotates to the position, contacting with the preloading component 53, of the swing arm 521, the end, contacting with the preloading component 53, of the swing arm 521 is pressed downwards, the recognition plate 522 is driven to swing forwards, dynamic changes of the front position and the rear position of the recognition plate 522 are monitored through the laser displacement sensor, and changes of loading force on each cam 101 when the camshaft 1 rotates can be obtained.
Camshaft test equipment in this embodiment utilizes the principle that is similar to the seesaw through setting up the loading device that corresponds with the camshaft, has realized preloading subassembly, loading swing arm subassembly and the combination between the camshaft, and when the camshaft rotated, when the cam pushed down the second roller, the first roller that corresponds will upwarp, and first roller will push up down the spring holder, compresses the spring. Meanwhile, the identification plate swings towards the direction close to the first roller, and the dynamic change of the front position and the rear position of the identification plate is measured and monitored through the distance meter, so that the change of the loading force applied to each cam when the cam shaft rotates can be obtained. The upper end of the jacking screw rod is adjusted to further adjust the position of the upper spring seat, the compression amount of the elastic piece is adjusted, and the size of the static pre-pressure is adjusted.
For the large-scale camshaft of guaranteeing to design by oneself and make can replace the imported product completely and explore design standard and the performance test method of camshaft for nuclear power diesel generator, the utility model discloses develop above camshaft test equipment. The test equipment is based on the core component test of the special diesel generating set in the nuclear power field, adopts a unique detection means and a structural design, and can simultaneously meet the variable load test, the service life test, the strength test and the fault diagnosis of various large camshafts with various lengths of 1-3 meters under heavy load, high rotating speed and complex working conditions by using a high-precision sensor. The successful development of the camshaft test equipment fills the gap of the large camshaft test field in China, and has good application prospect.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (9)
1. A camshaft test equipment which characterized in that: the device comprises a base, a loading device arranged on the base, a supporting device used for supporting a camshaft and a driving device used for driving the camshaft to rotate;
the loading device comprises a bracket, a loading swing arm assembly matched with a cam on the cam shaft and a preloading assembly matched with the loading swing arm assembly, wherein the loading swing arm assembly is positioned between the cam and the preloading assembly;
the loading swing arm assembly comprises a swing arm and an identification plate vertically arranged in the middle of the swing arm, rollers are arranged at two ends of the swing arm, the rollers comprise a first roller matched with the preloading assembly and a second roller matched with the cam, a vertical plate is arranged on the support, the middle of the swing arm is rotatably connected to the vertical plate, and a distance meter corresponding to the identification plate is arranged on the support;
the preloading assembly comprises a shell, a gland positioned above the shell, an elastic piece, an upper spring seat and a lower spring seat, wherein the elastic piece and the upper spring seat are positioned in a space formed between the shell and the gland, the upper end of the elastic piece acts on the upper spring seat, the lower end of the elastic piece acts on the lower spring seat, the lower end of the lower spring seat penetrates through the bottom surface of the shell and is matched with the first roller, and the preloading assembly further comprises an adjusting mechanism used for adjusting the compression amount of the elastic piece.
2. A camshaft test apparatus as claimed in claim 1, wherein: the adjusting mechanism comprises a jacking screw rod acting on the upper end of the upper spring seat, and the upper end of the jacking screw rod penetrates through the gland and extends outwards.
3. A camshaft test apparatus as claimed in claim 1, wherein: the preloading assembly further comprises a displacement mechanism used for measuring the position of the upper spring seat, the displacement mechanism comprises a movable rod fixed on the upper spring seat and a pull rope sensor arranged on the support, a movable groove for the movable rod to move up and down is formed in the shell, and a pull rope is connected between the pull rope sensor and the movable rod.
4. A camshaft test apparatus as claimed in claim 1, wherein: the both ends of swing arm have the splint, form between two splints with one side and be used for holding the roll mouth of roller, the roller is installed on the splint, the diameter of roller is greater than the height of the splint of roller mounted position.
5. A camshaft test apparatus as claimed in claim 1, wherein: the range finder is installed keep away from on the support one side of second roller, the range finder is used for measuring the distance of discerning the board by vertical direction to first roller direction swing.
6. A camshaft test apparatus as claimed in claim 1, wherein: and the bracket is provided with a temperature measuring device for measuring the temperature of the camshaft.
7. A camshaft test apparatus as claimed in claim 1, wherein: the driving device comprises a motor and a universal coupling arranged between the motor and the camshaft, and an output shaft of the motor, the universal coupling and the camshaft are coaxially arranged.
8. A camshaft test apparatus as claimed in any one of claims 1 to 7, wherein: the supporting device comprises a plurality of bearing blocks fixed on the base, the camshaft is rotatably arranged in the bearing blocks, and the loading devices are correspondingly arranged between the adjacent bearing blocks.
9. A camshaft test apparatus as claimed in claim 8, wherein: the base is provided with a sliding groove extending along the length direction of the camshaft, and the support and the lower portion of the bearing seat are connected with the sliding groove in a matched mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921216814.3U CN210180655U (en) | 2019-07-30 | 2019-07-30 | Camshaft test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921216814.3U CN210180655U (en) | 2019-07-30 | 2019-07-30 | Camshaft test equipment |
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| Publication Number | Publication Date |
|---|---|
| CN210180655U true CN210180655U (en) | 2020-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921216814.3U Withdrawn - After Issue CN210180655U (en) | 2019-07-30 | 2019-07-30 | Camshaft test equipment |
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| CN (1) | CN210180655U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346132A (en) * | 2019-07-30 | 2019-10-18 | 苏州热工研究院有限公司 | Camshaft testing equipment |
-
2019
- 2019-07-30 CN CN201921216814.3U patent/CN210180655U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346132A (en) * | 2019-07-30 | 2019-10-18 | 苏州热工研究院有限公司 | Camshaft testing equipment |
| CN110346132B (en) * | 2019-07-30 | 2024-12-24 | 苏州热工研究院有限公司 | Camshaft testing equipment |
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