Track adjuster for tracked vehicle

Abstract

The invention provides a track adjuster for a track vehicle. The track adjuster comprises a front screw assembly, a coupler, a worm, an adjuster body, a rear screw assembly, a knuckle bearing, an O-shaped sealing ring, a supporting sleeve, a check ring, a worm gear and an end cover. The worm and gear core transmission function component in the track adjuster is restrained and packaged in the internal space of the adjuster body with the size of 70mm * 104mm * 144mm, the structure is compact, and the space utilization rate is high. The torque required by the track adjuster during track adjustment is only 1 / 28 of that of a traditional spiral lead screw type adjuster, so that the track adjuster is extremely labor-saving. The track adjuster can be operated through a universal sleeve and an electric wrench, and compared with a traditional adjuster needing a special tool for manual adjustment, the track adjuster is more convenient, rapid and efficient. The four self-locking mechanisms of the track adjuster ensure effective self-locking of the adjuster. Due to the application of multiple seals of the track adjuster, good sealing of the adjuster is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of track adjustment of crawler vehicles, and in particular relates to a crawler vehicle track adjuster which is a combination of a worm gear and a spiral screw. Background Art

[0002] At present, my country's tracked vehicles use traditional spiral screw adjusters to adjust the tracks. In actual use, a special open-end wrench is used to twist the outer hexagon of the adjuster body to form a spiral motion to control the extension and retraction of the screw. This adjustment method is relatively laborious and inefficient. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The present invention provides a crawler track adjuster for a crawler vehicle to solve the technical problem of how to achieve fast and efficient adjustment of the tightness of the crawler track of a crawler vehicle, reduce the labor intensity of the operator, and improve the adjustment efficiency.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention proposes a crawler track adjuster for a crawler vehicle, which includes a front screw assembly, a connector, a worm, an adjuster body, a rear screw assembly, a spherical bearing, an O-ring, a support sleeve, a retaining ring, a worm gear and an end cover; wherein,

[0007] The front screw assembly is welded by the front screw and the steel sleeve, the rod of the front screw is inserted into the steel sleeve from the outer end of the steel sleeve and passes through the inner end of the steel sleeve, the cylindrical step surface of the head of the front screw is welded and fixed to the outer end of the steel sleeve, and the threaded part of the front screw is a left-handed external thread; the rear screw assembly is welded by the rear screw and the steel sleeve, the rod of the rear screw is inserted into the steel sleeve from the outer end of the steel sleeve and passes through the inner end of the steel sleeve, the cylindrical step surface of the head of the rear screw is welded and fixed to the outer end of the steel sleeve, and the threaded part of the rear screw is a right-handed external thread;

[0008] The inner ends of the steel sleeves of the front screw assembly and the rear screw assembly are provided with sealing ring grooves, and each sealing ring groove is installed with an O-ring to seal the inner cavity of the front screw assembly and the rear screw assembly to prevent grease leakage and external debris from invading;

[0009] The connector is a thin-walled hollow structure; wherein the middle of the connector is provided with a keyway, and both sides of the keyway are round tube structures, a boss structure is provided on the left side of the keyway, a left-handed internal thread is provided on the inner wall of the left round tube structure of the connector, and a right-handed internal thread is provided on the inner wall of the right round tube structure of the connector, and the left round tube structure and the right round tube structure of the connector are respectively inserted into the corresponding steel sleeves by the inner ends of the steel sleeves of the front screw assembly and the rear screw assembly, and are respectively screwed with the left-handed external thread of the front screw and the right-handed external thread of the rear screw to form a spiral transmission;

[0010] Joint bearings are installed in the inner holes of the heads of the front screw and the rear screw respectively; the first oil filling hole and the first oil outlet hole which are connected with the surface of the corresponding joint bearing are respectively opened above and below the head of the front screw, and the first oil filling hole and the first oil outlet hole which are connected with the surface of the corresponding joint bearing are respectively opened above and on the side of the head of the rear screw, and screw plugs are respectively installed at the first oil filling hole and the first oil outlet hole for sealing, and oil is filled from the first oil filling hole and overflows from the first oil outlet hole, so that the grease filling of the joint bearing is completed, and an independent micro-circulation lubrication channel is formed;

[0011] A second oil filling hole is formed on the steel sleeve of the front screw assembly, and a second oil outlet hole is formed on the steel sleeve of the rear screw assembly. The second oil filling hole and the second oil outlet hole are respectively connected with the corresponding inner cavities of the front screw assembly and the rear screw assembly. Screw plugs are respectively installed at the second oil filling hole and the second oil outlet hole for sealing. When filling oil, the oil is filled from the second oil filling hole and overflows from the second oil outlet hole, thereby completing the filling of grease inside the adjuster and forming an independent circulation lubrication channel.

[0012] The worm wheel is connected to the keyway of the connector through a key, and the worm is fixed in the upper through hole of the adjuster body and meshes with the worm wheel to form a worm gear transmission; two opposite nuts are installed at the rear end thread of the external hexagonal head of the worm to lock the worm;

[0013] The cylindrical surface at the right end of the boss structure of the connector is installed in the adjuster body through a sleeve support sleeve and a retaining ring, and the cylindrical surface at the left end of the boss structure of the connector is installed in the adjuster body through a sleeve support sleeve located in the end cover; the end cover is fixedly connected to the left end of the adjuster body by bolts; sealing ring grooves are respectively processed on the right end of the adjuster body and the end cover, and O-rings are installed in the sealing ring grooves for sealing the interior of the adjuster body to prevent grease leakage and external debris from intrusion.

[0014] Furthermore, both the left-handed external thread and the internal-handed external thread are trapezoidal threads.

[0015] Furthermore, two sealing ring grooves are provided at the inner ends of the steel sleeves of the front screw assembly and the rear screw assembly.

[0016] Furthermore, a sealing gasket is provided between the end cover and the adjuster body.

[0017] Furthermore, a bolt is installed at the lower part of the adjuster body close to the side of the vehicle body. By adjusting the length of the bolt screwed into the adjuster body, the top of the bolt contacts the side of the vehicle body, thereby limiting the side of the adjuster body and preventing the adjuster body from rotating around the connector.

[0018] Furthermore, two opposing nuts are installed on the bolt to lock the bolt.

[0019] Furthermore, the spherical bearing in the rear screw assembly is hinged to the vehicle body adjuster support through a nut.

[0020] Furthermore, the spherical bearing in the front screw assembly is connected to the ear hole of the inducer crank arm through a pin and a nut.

[0021] Furthermore, the transmission ratio of the worm wheel to the worm is 40:1.

[0022] Furthermore, the spatial dimensions of the adjuster body are 70 mm×104 mm×144 mm.

[0023] (III) Beneficial effects

[0024] The present invention proposes a track adjuster for a crawler vehicle, comprising a front screw assembly, a connector, a worm, an adjuster body, a rear screw assembly, a spherical bearing, an O-ring, a support sleeve, a retaining ring, a worm wheel and an end cover. The present invention has reliable self-locking, compact structure, good sealing, high efficiency and labor saving, and can overcome the shortcomings of labor-intensive and low efficiency of traditional track adjusters. The electric wrench is used to control the worm gear transmission to drive the screw to quickly extend and retract, effectively meeting the needs of fast and efficient track adjustment of crawler vehicles. The core transmission functional components of the worm gear in the track adjuster are constrained and packaged in the internal space of the 70mm×104mm×144mm adjuster body, with a compact structure and high space utilization. The torque required by the track adjuster during track adjustment is only 1 / 28 of that of the traditional screw screw type adjuster, which is extremely labor-saving. The track adjuster can be operated using a universal sleeve and an electric wrench, which is more convenient, fast and efficient than the traditional adjuster that requires special tools for manual adjustment. The four self-locking mechanisms of the track adjuster ensure the effective self-locking of the adjuster. The use of multiple seals on the track adjuster ensures good sealing of the adjuster. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front and cross-sectional view of the crawler track adjuster structure of a crawler type vehicle of the present invention;

[0026] Figure 2 The structural appearance diagram of the crawler track adjuster for a crawler type vehicle of the present invention;

[0027] Figure 3 It is a left view of the structure and appearance of the crawler track adjuster for a crawler type vehicle of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the front screw assembly in the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the rear screw assembly in the present invention;

[0030] Figure 6 It is a schematic diagram of the connector structure in the present invention;

[0031] Figure 7a A state diagram of the crawler track adjuster of a crawler type vehicle of the present invention when installed on the vehicle body; Figure 7b for Figure 7a AA partial cross-sectional view, Figure 7c for Figure 7a BB cross-sectional view. DETAILED DESCRIPTION

[0032] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0033] This embodiment provides a track adjuster for a tracked vehicle, such as Figures 1 to 3 As shown, the track adjuster mainly includes a front screw assembly 1, a connector 2, a worm 3, an adjuster body 4, a rear screw assembly 5, a spherical bearing 6, a first O-ring 7, a second O-ring 8, a support sleeve 9, a retaining ring 10, a worm gear 11, a sealing gasket 12, an end cover 13, a first screw plug 14, a second screw plug 15, a first nut 16, a bolt 17 and a second nut 18.

[0034] like Figure 4 As shown, the front screw assembly 1 is welded by the front screw 101 and the steel sleeve 102. The rod of the front screw 101 is inserted into the steel sleeve 102 from the outer end of the steel sleeve 102 and passes through the inner end of the steel sleeve 102. The cylindrical step surface of the head of the front screw 101 is welded and fixed to the outer end of the steel sleeve 102. The threaded part of the front screw 101 is a left-handed external thread. Figure 5 As shown, the rear screw assembly 5 is welded by the rear screw 103 and the steel sleeve 102. The rod of the rear screw 103 is inserted into the steel sleeve 102 from the outer end of the steel sleeve 102 and passes through the inner end of the steel sleeve 102. The cylindrical step surface of the head of the rear screw 103 is welded and fixed to the outer end of the steel sleeve 102. The threaded part of the rear screw 103 is a right-handed external thread. The external threads are all trapezoidal threads.

[0035] The inner ends of the steel sleeves 102 of the front screw assembly 1 and the rear screw assembly 5 are each provided with two sealing ring grooves, each of which is installed with a first O-ring 7 for sealing the inner cavity of the front screw assembly 1 and the rear screw assembly 5 to prevent grease leakage and the intrusion of external dust and other debris.

[0036] like Figure 6 As shown, the connector 2 is a thin-walled hollow structure. The middle part of the connector 2 is set as a keyway, and the two sides of the keyway are round tube structures. A boss structure is set on the left side of the keyway. The inner wall of the left round tube structure of the connector 2 is provided with a left-handed internal thread, and the inner wall of the right round tube structure of the connector 2 is provided with a right-handed internal thread. The left round tube structure and the right round tube structure of the connector 2 are respectively inserted into the corresponding steel sleeves 102 by the inner ends of the steel sleeves 102 of the front screw assembly 1 and the rear screw assembly 5, and are respectively screwed with the left-handed external thread of the front screw 101 and the right-handed external thread of the rear screw 103 to form a spiral transmission.

[0037] Joint bearings 6 are installed in the inner holes of the heads of the front screw 101 and the rear screw 103. The first oil filling hole and the first oil outlet hole are respectively opened above and below the head of the front screw 101, which are connected to the surface of the corresponding joint bearing 6. The first oil filling hole and the first oil outlet hole are respectively opened above and on the side of the head of the rear screw 103, which are connected to the surface of the corresponding joint bearing 6. The first screw plugs 14 are respectively installed at the oil filling hole and the oil outlet hole for sealing. When filling oil, fill it from the first oil filling hole, and overflow from the first oil outlet hole, so that the grease filling of the joint bearing 6 can be completed, forming an independent micro-circulation lubrication channel.

[0038] A second oil filling hole is formed on the steel sleeve 102 of the front screw assembly 1, and a second oil outlet hole is formed on the steel sleeve 102 of the rear screw assembly 5. The second oil filling hole and the second oil outlet hole are respectively connected to the corresponding inner cavities of the front screw assembly 1 and the rear screw assembly 5. Second screw plugs 15 are respectively installed at the second oil filling hole and the second oil outlet hole for sealing. When filling oil, fill it from the second oil filling hole and overflow from the second oil outlet hole, so that the grease inside the adjuster can be filled, forming another independent circulation lubrication channel.

[0039] The worm wheel 11 is connected to the keyway of the connector 2 through a key, and the worm 3 is fixed in the upper through hole of the adjuster body 4 and meshes with the worm wheel 11 to form a worm gear transmission.

[0040] The cylindrical surface at the right end of the boss structure of the connector 2 is installed in the adjuster body 4 through the sleeve support sleeve 9 and the retaining ring 10, and the cylindrical surface at the left end of the boss structure of the connector 2 is installed in the adjuster body 4 through the sleeve support sleeve 9 located in the end cover 13. The end cover 13 is fixedly connected to the left end of the adjuster body 4 by bolts, and a sealing gasket 12 is arranged between the end cover 13 and the adjuster body 4. The right end of the adjuster body 4 and the end cover 13 are respectively processed with sealing ring grooves, and a second O-ring 8 is installed in the sealing ring groove to seal the inside of the adjuster body 4 to prevent grease leakage and the intrusion of external dust and other debris.

[0041] Two first nuts 16 facing each other are arranged at the rear end thread of the external hexagonal head of the worm 3 for locking the worm 3 .

[0042] A bolt 17 is installed at the lower part of the adjuster body 4 near the side of the vehicle body. By adjusting the length of the bolt 17 screwed into the adjuster body 4, the top of the bolt 17 is in contact with the side of the vehicle body, thereby limiting the side of the adjuster body 4 to prevent the adjuster body 4 from rotating around the connector 2. Two second nuts 18 are installed on the bolt 17 to lock the bolt 17.

[0043] When using track adjusters on tracked vehicles, Figures 7a to 7c As shown, the spherical bearing 6 in the rear screw assembly 5 of the adjuster 19 is hinged to the vehicle body adjuster support 20 through the third nut 22, and the spherical bearing 6 in the front screw assembly 1 is connected to the ear hole of the inducer crank arm 21 through the pin 23 and the third nut 22.

[0044] When the track needs to be adjusted, first loosen the first nut 16 that is locked against the top on the worm 3, and use the sleeve and electric wrench to act on the outer hexagonal head of the worm 3 to rotate it, which further drives the worm wheel 11 that cooperates with it to rotate. The rotation of the worm wheel 11 is transmitted to the connector 2 connected to it through the key to rotate, and further causes the left and right spiral pairs of the front screw assembly 1 and the rear screw assembly 5 to rotate, thereby realizing the linear telescopic movement of the front screw 101 and the rear screw 103 along the connector 2.

[0045] The transmission ratio of the worm wheel 11 to the worm 3 is 40:1, and the transmission efficiency is 70%. The torque required for adjustment is only 1 / 28 of that of the traditional spiral screw, which is extremely labor-saving.

[0046] The design of the external hexagonal head of the worm 3 can be operated using a universal socket and an electric wrench, which is more convenient, faster and more efficient than the traditional adjuster which requires special tools for manual adjustment.

[0047] Two first O-rings 7 are installed in the sealing ring grooves of the steel sleeve 102 in the front screw assembly 1 and the rear screw assembly 5, and second O-rings 8 are installed in the sealing ring grooves of the end cover 13 and the adjuster body 4, which can form a good seal for the spiral screw and worm gear of the key transmission parts of the adjuster, restrict the overflow of grease and the intrusion of external impurities, and maintain a good movement environment inside the adjuster.

[0048] The self-locking function of the spiral screw transmission and the self-locking function of the worm gear transmission, plus the application of two opposing first nuts 16 at the head of the worm 3 and the lateral bolts 17 and two opposing second nuts 18 of the adjuster body 4, form a four-way self-locking mechanism, which can ensure that the adjuster can effectively self-lock after being adjusted to the appropriate length.

[0049] The adjuster body 4 occupies a space of only 70mm×104mm×144mm, which can realize the installation of components such as the connector 2, worm 3, second O-ring 8, support sleeve 9, retaining ring 10, worm wheel 11, end cover 13, as well as the core transmission function of the worm gear, with a compact structure and extremely high space utilization.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A crawler vehicle track adjuster, characterized in that: The crawler track adjuster of the crawler vehicle includes a front screw assembly, a connector, a worm, an adjuster body, a rear screw assembly, a spherical bearing, an O-ring, a support sleeve, a retaining ring, a worm gear and an end cover; wherein, The front screw assembly is welded by the front screw and the steel sleeve, the rod of the front screw is inserted into the steel sleeve from the outer end of the steel sleeve and passes through the inner end of the steel sleeve, the cylindrical step surface of the head of the front screw is welded and fixed to the outer end of the steel sleeve, and the threaded part of the front screw is a left-handed external thread; the rear screw assembly is welded by the rear screw and the steel sleeve, the rod of the rear screw is inserted into the steel sleeve from the outer end of the steel sleeve and passes through the inner end of the steel sleeve, the cylindrical step surface of the head of the rear screw is welded and fixed to the outer end of the steel sleeve, and the threaded part of the rear screw is a right-handed external thread; The inner ends of the steel sleeves of the front screw assembly and the rear screw assembly are provided with sealing ring grooves, and each sealing ring groove is installed with an O-ring to seal the inner cavity of the front screw assembly and the rear screw assembly to prevent grease leakage and external debris from invading; The connector is a thin-walled hollow structure; wherein the middle of the connector is provided with a keyway, and both sides of the keyway are round tube structures, a boss structure is provided on the left side of the keyway, a left-handed internal thread is provided on the inner wall of the left round tube structure of the connector, and a right-handed internal thread is provided on the inner wall of the right round tube structure of the connector, and the left round tube structure and the right round tube structure of the connector are respectively inserted into the corresponding steel sleeves by the inner ends of the steel sleeves of the front screw assembly and the rear screw assembly, and are respectively screwed with the left-handed external thread of the front screw and the right-handed external thread of the rear screw to form a spiral transmission; Joint bearings are installed in the inner holes of the heads of the front screw and the rear screw respectively; the first oil filling hole and the first oil outlet hole which are connected with the surface of the corresponding joint bearing are respectively opened above and below the head of the front screw, and the first oil filling hole and the first oil outlet hole which are connected with the surface of the corresponding joint bearing are respectively opened above and on the side of the head of the rear screw, and screw plugs are respectively installed at the first oil filling hole and the first oil outlet hole for sealing, and oil is filled from the first oil filling hole and overflows from the first oil outlet hole, so that the grease filling of the joint bearing is completed, and an independent micro-circulation lubrication channel is formed; A second oil filling hole is formed on the steel sleeve of the front screw assembly, and a second oil outlet hole is formed on the steel sleeve of the rear screw assembly. The second oil filling hole and the second oil outlet hole are respectively connected with the corresponding inner cavities of the front screw assembly and the rear screw assembly. Screw plugs are respectively installed at the second oil filling hole and the second oil outlet hole for sealing. When filling oil, the oil is filled from the second oil filling hole and overflows from the second oil outlet hole, thereby completing the filling of grease inside the adjuster and forming an independent circulation lubrication channel. The worm wheel is connected to the keyway of the connector through a key, and the worm is fixed in the upper through hole of the adjuster body and meshes with the worm wheel to form a worm gear transmission; two opposite nuts are installed at the rear end thread of the external hexagonal head of the worm to lock the worm; The cylindrical surface at the right end of the boss structure of the connector is installed in the adjuster body through a sleeve support sleeve and a retaining ring, and the cylindrical surface at the left end of the boss structure of the connector is installed in the adjuster body through a sleeve support sleeve located in the end cover; the end cover is fixedly connected to the left end of the adjuster body by bolts; sealing ring grooves are respectively processed on the right end of the adjuster body and the end cover, and O-rings are installed in the sealing ring grooves for sealing the interior of the adjuster body to prevent grease leakage and external debris from intrusion.

2. The crawler track adjuster for a crawler vehicle according to claim 1, characterized in that: The left-handed external thread and the internal-handed external thread are both trapezoidal threads.

3. The crawler track adjuster for a crawler vehicle according to claim 1, characterized in that: The inner ends of the steel sleeves of the front screw assembly and the rear screw assembly are both provided with two sealing ring grooves.

4. The crawler track adjuster for a crawler vehicle according to claim 1, characterized in that: A sealing gasket is arranged between the end cover and the adjuster body.

5. The crawler track adjuster for a crawler vehicle according to claim 1, characterized in that: A bolt is installed at the lower part of the adjuster body close to the side of the vehicle body. By adjusting the length of the bolt screwed into the adjuster body, the top of the bolt contacts the side of the vehicle body, thereby limiting the side of the adjuster body and preventing the adjuster body from rotating around the connector.

6. The crawler track adjuster for a crawler vehicle according to claim 5, characterized in that: Two opposing nuts are installed on the bolt to lock the bolt.

7. The crawler track adjuster for a crawler vehicle according to claim 1, characterized in that: The spherical bearing in the rear screw assembly is hinged to the body adjuster support through a nut.

8. The crawler track adjuster for a crawler vehicle according to claim 1, wherein: The spherical bearing in the front screw assembly is connected to the ear hole of the inducer crank arm through a pin and a nut.

9. The crawler track adjuster for a crawler vehicle according to claim 1, wherein: The transmission ratio of the worm wheel to the worm is 40:

1.

10. The crawler track adjuster for a crawler vehicle according to claim 1, wherein: The spatial dimensions of the adjuster body are 70 mm×104 mm×144 mm.

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