235 results about "Transverse groove" patented technology

The utility model relates to the technical field of track structures, in particular to a frame type embedded track structure which comprises a base body, a transverse groove is formed in the base body, a noise reduction mechanism is arranged in the base body, the noise reduction mechanism comprises a vibration isolation supporting plate, the vibration isolation supporting plate is fixedly connected to the top of the inner side of the transverse groove, and the vibration isolation supporting plate is fixedly connected to the top of the inner side of the transverse groove. The top of the vibration isolation supporting plate is fixedly connected with a damping rod, the outer wall of the damping rod is sleeved with a spring, the top of the damping rod is fixedly connected with an elastic plate, the top of the elastic plate is fixedly connected with a rubber pad, the top of the rubber pad is fixedly connected with a boss, and the back of the boss is fixedly connected with a cross beam. The vibration isolation supporting plate is used for isolating vibration, the rubber pads are used for buffering and supporting, the two transverse grooves are formed in the left side and the right side of the interior of the base body, and the train noise can be reduced when a train passes through the train noise reduction device, so that the situation that the life of residents is affected due to the fact that the train noise is too large is avoided.

The utility model discloses a distributor with a spiral lock. The distributor comprises a pump body, a valve rod, a spiral sleeve and a spring. The lower portion of the valve rod is sleeved with the spiral sleeve, and the spiral sleeve and the valve rod are fixed in the circumferential direction. The valve rod is sleeved with the spring, the upper plane of the spring abuts against the duckbill, and the lower plane of the spring abuts against the spiral sleeve. A spiral groove is formed in the pump body, and a transverse groove is formed adjacent to the top of the spiral groove. A spiral protrusion is arranged on the side wall of the spiral sleeve. When the spiral protrusion is located in the transverse groove, the distributor with the spiral lock is in an opened state. When the spiral protrusion is located at the bottom of the spiral groove, the distributor with the spiral lock is in a closed state. According to the distributor with the spiral lock, the user experience of consumers is improved, and the service life of the distributor is prolonged. According to the distributor with the spiral lock, the product height is reduced, and the production cost is reduced; and the outer diameter of the pump body is reduced, so that the adaptability and the applicability of the spiral lock distributor are wider.

The utility model relates to the technical field of range hoods, and particularly discloses a hanging structure, a range hood and a hoisting system. The hanging structure comprises a mounting frame, hanging groove structures are arranged on the two opposite sides of the mounting frame, each hanging groove structure comprises a vertical groove, a transverse groove and a limiting piece, the vertical grooves extend in the vertical direction, openings are formed in the positions, at the bottom of the mounting frame, of the lower ends of the vertical grooves, the transverse grooves extend in the horizontal direction, and the limiting pieces are arranged on the transverse grooves. One end of the transverse groove is communicated with the upper end of the vertical groove; and the limiting piece is arranged in the transverse groove and is used for limiting the hook in the transverse groove to be separated from the transverse groove. According to the utility model, the range hood can be conveniently and quickly mounted, and the mounting efficiency is improved.

The invention relates to an eccentric-to-concentric angle adjuster which comprises an outer toothed plate installed on a guide plate through a cross coupling, and the surface, facing the cross coupling, of the guide plate is provided with paired transverse protrusions so that transverse sliding grooves can be formed between the transverse protrusions. The surface, facing the cross coupling, of the outer toothed plate is provided with paired vertical protrusions so that a vertical sliding groove can be formed between the vertical protrusions, the cross coupling comprises a transverse sliding block and a vertical sliding block which are vertically arranged, the transverse sliding block is contained in the transverse sliding groove to slide so as to provide contact fit, and the vertical sliding block is contained in the vertical sliding groove to slide so as to provide contact fit; the cross coupling further comprises supporting blocks or wedge-shaped blocks acting on the transverse sliding blocks and the vertical sliding blocks so that the transverse sliding blocks and the vertical sliding blocks can be expanded in the width direction to eliminate the sliding groove gaps. According to the eccentric-to-concentric angle adjuster, on the premise of low cost, all the sliding groove gaps in the cross-shaped structure are stably controlled to be not larger than 0.015 mm, and the backrest gap is greatly reduced.

The utility model discloses a cross beam suspended straight-row tool magazine, which relates to the technical field of tool changing of machine tools and comprises a tool magazine bottom plate, a pushing mechanism and a suspension plate. The pushing mechanism drives the tool magazine bottom plate to move front and back. A transverse rod is detachably installed on the front side of the tool magazine bottom plate through screws, side plates are fixedly installed at the left end and the right end of the transverse rod, transverse grooves are formed in the side plates, right-angle grooves which are bent downwards are formed in the front ends of the transverse grooves, and clamping grooves are formed between the right-angle grooves and the transverse grooves. A shielding cover is fixedly installed on the front side of the hanging plate, a cross rod and a knife rest are installed in the shielding cover in a clearance fit mode, a cover plate is installed on the upper edge of the front side of the shielding cover in a hinged fit mode, pulley yokes are fixedly installed at the left end and the right end of the rear side of the cover plate, and sliding wheels are installed on the pulley yokes in a rotating fit mode. The sliding wheel is installed among the transverse groove, the right-angle groove and the clamping groove in a sliding fit mode. The shielding cover can be used for preventing metal chippings from affecting the tool magazine during machine tool machining, and the service life of the tool magazine is guaranteed.

The utility model discloses a raised floor and stone ground joining, installing and fixing structure which comprises a hollow supporting bottom piece, a slotting supporting column is fixedly connected to the top of the hollow supporting bottom piece, a transverse groove is formed in an inner cavity of the slotting supporting column, and a positioning fixing column is connected to the inner cavity of the slotting supporting column in a sliding mode. A positioning fixing column is arranged on the surface of the transverse groove, a supporting round head is welded to the top end of the positioning fixing column, a plate round head is fixedly connected to the top end of the supporting round head, supporting round rods are slidably connected to the left side and the right side of an inner cavity of the transverse groove, and a spring is welded between a bevel head and the inner cavity of the transverse groove. And when the plate round head is higher than the position of the inclined plane head, the inclined plane head is reset under the action of the spring, and the installation of the slotted support column is completed, so that the purposes of facilitating the installation of the raised floor support and accelerating the laying process of the support can be achieved.

The invention relates to vehicle tires with a tread having at least one shoulder-side profile rib (1) bounded by a shoulder-side circumferential groove (2), comprising an inner section (11), a shoulder section (12), a rib outer surface (1a), and groove-cut combinations (K) consisting of a transverse groove (3) extending at least in the shoulder section (12) and a cut (9) extending from the transverse groove (3) towards the shoulder-side circumferential groove (2). wherein the transverse groove (3) on the outer surface of the rib (1a) has an end edge (4) and an end flank (3d) extending towards the end edge (4) and wherein the incision (9) has an incision opening (9e) located on the end flank (3d) of the transverse groove (3). The incision (9) opens into the shoulder-side circumferential groove (2) and divides the end edge (4) into two end edge sections (4a), whereby the incision opening (9e) located on the end flank (3d) of the transverse groove (3) is surrounded by the end flank (3d) in a U-shape.

The invention relates to a combination of a disc pin cylinder lock (3) and a key (2), the disc pin cylinder lock (3) comprising a rotation limiting device (10) for the key. The rotation limiting device comprises a main body (13) having a key profile opening (34), and a guide element (12) connected to the main body. The key (2) comprises guide grooves (21) located on both sides of the key in the longitudinal direction of the key shank (2A), and a transverse groove (19) transverse to the longitudinal axis of the shank (2A) of the key (2). The rotation limiting device (10) comprises one or two plates (14).

This invention discloses an adjustable shaped charge device and its blasting method for bench blasting in open-pit mines, relating to the field of engineering blasting technology. The adjustable shaped charge device includes: an adjustable shaped charge liner, lifting holes, a sheath, a transverse groove, a cross-shaped buckle, an adjustable liner, linear shaped charge slots, and a bottom cylindrical counterweight. Lifting holes are provided on both sides of the top of the adjustable shaped charge liner. A sheath and a transverse groove are provided on the upper part of the inner wall of the adjustable shaped charge liner. The sheath is detachably connected to the adjustable liner via cross-shaped buckles. The linear shaped charge slots are provided at both ends of the adjustable liner, and the bottom of the adjustable liner is fixedly connected to the bottom cylindrical counterweight. The entire adjustable shaped charge device is placed at the bottom of the blast hole. This invention solves the problems of uneven energy distribution, unstable fragmentation effect, and high root ratio and large block ratio in existing technologies under complex rock strata conditions.

The utility model provides a wall -hanging indoor air purification device belongs to air purifier technical field, including air purifier body, the vertical groove, horizontal groove and oblique groove of setting up in air purifier body one side outer wall, horizontal groove is located between vertical groove and oblique groove and is linked together, two fender strips of symmetry of being equipped with in the inner side wall of vertical groove, horizontal groove and oblique groove, fender strip two of being equipped with in the inner side wall of vertical groove, the docking platform of being equipped with in air purifier body one side position place, the fixed seat of integrative molding in the docking platform outer side wall central position place, the utility model passes through the docking platform to the air purifier body of being set in its outside in vertical direction support, and utilizes fender strip one and fender strip two in horizontal direction limit, realizes air purifier body and docking platform docking firm and stable, and horizontal sleeve joint's mode is convenient for air purifier body dismounting, and is convenient for overhauling, and the difficulty of overhauling is low.

The utility model discloses a draggable bottom frame which comprises a base, two sets of transverse groove plates are fixedly installed on the top of the base, the base is made of high-strength alloy steel, two sets of lifting lug shafts are fixedly installed on the transverse groove plates, lifting lug shaft plates are fixedly arranged at the outer side ends of the lifting lug shafts, and the transverse groove plates are connected through two sets of vertical groove plates. The outer sides of the vertical groove plates are connected with end steel channels through a plurality of sets of end reinforcing plates, the two ends of the end steel channels are fixedly connected with the transverse groove plates through connecting plates, the bottoms of the end steel channels are fixedly connected with the base through inclined bottom frame blocking plates, and dragging grooves are fixedly formed in the outer sides of the end steel channels. The end steel channels are installed above the base, the dragging grooves are fixedly formed in the outer sides of the end steel channels, the bottom frame can be dragged to move through the dragging grooves in the later period, meanwhile, the base is made of high-strength alloy steel, and the moisture absorption layer and the anti-skid layer are fixedly arranged on the inner sides of the dragging grooves in sequence. Therefore, the wear resistance of the base during dragging is further improved.

The utility model discloses a kind of block wall structure with anti-infiltration structure, it is related to block wall technical field, including block body, the upper surface outer edge of the block body is provided with transverse groove, the lower surface outer edge of the block body is provided with transverse protrusion, the transverse protrusion is matched with the transverse groove of adjacent block body, the left side surface outer edge of the block body is provided with vertical protrusion, the right side surface outer edge of the block body is provided with vertical groove, the vertical groove is matched with the vertical protrusion of adjacent block body, positioning assembly is provided on the block body;The utility model is formed by transverse protrusion and transverse groove, vertical protrusion and vertical groove, and "Z" shape masonry gap, so that there is height difference and distance difference between outer edge and internal masonry gap, effectively block rainwater into wall interior.

This utility model discloses a motor housing explosion-proof pressure-resistant testing device, including a base and two mounting mechanisms mounted on the base. Each mounting mechanism includes a transverse groove vertically extending along the length of the base on one side of its upper surface. A threaded rod is laterally rotatably connected to the middle of the inner surface of the groove, and a threaded sleeve is threadedly connected to the outer surface of the threaded rod. A slider adapted to the length of the groove is slidably connected inside the transverse groove. A through groove adapted to the threaded sleeve is laterally extended through the middle of the side surface of the slider, and the threaded sleeve is vertically slidably connected inside the through groove. Bolt slots extending along the length of the base are vertically extended through the upper surface of the slider and at both ends of the threaded rod. This device features two mounting mechanisms on the base, with elongated bolt slots on the sliders of both mechanisms, and both sliders are capable of lateral movement. This allows the device to adapt to various motor models, thereby improving its versatility.

The utility model discloses a steel grating cutting device, and relates to the technical field of steel grating cutting. The steel grating machining device comprises a machining table, a steel grating body is movably installed at the top end of the machining table, a supporting base is fixedly installed on the left side of the top end of the machining table, a direction groove is formed in one end of the supporting base, a first screw rod is rotatably installed on the inner side of the direction groove, and a movable frame is connected to the outer side of the first screw rod in a threaded and sleeved mode. A second screw rod is rotationally mounted on the inner side of the moving frame, and the outer side of the second screw rod is in threaded connection with a moving block in a sleeving mode; through cooperation of a first motor, a second motor, a first screw rod, a second screw rod, a moving frame and a moving block, a longitudinal block slides in a longitudinal groove to guide the moving frame, and a transverse block slides in a transverse groove to guide the moving block, so that a telescopic rod and cutting equipment are controlled to move at will above a steel grating body, cutting is conducted at will, and the cutting flexibility is improved; and the requirement for cutting different size parameters is met conveniently, and practicability is improved.

The application relates to the field of tire technology and discloses a high-performance light truck snow tire, which comprises a center pattern part and a shoulder pattern part, and a longitudinal groove is arranged between the center pattern part and the shoulder pattern part; the center pattern part comprises a center groove and oblique grooves, the center groove is arranged in the middle of a tread and extends along the circumferential direction of the tread, a plurality of the oblique grooves are symmetrically arranged on the two sides of the center groove and extend to the longitudinal groove, the center groove, the oblique grooves and the longitudinal groove divide the center pattern part into a plurality of diamond-shaped center pattern blocks; the shoulder pattern part comprises transverse grooves and trapezoidal sound-absorbing plugs arranged between the transverse grooves, the transverse grooves extend along the width direction of the tread, and the transverse grooves and the longitudinal groove divide the shoulder pattern part into a plurality of shoulder pattern blocks. On the basis of ensuring the snow performance, the wet skid and noise performance of the light truck snow tire are improved.

The simple folding type pouring device comprises a left drainage plate and a right drainage plate, the adjacent ends of the two drainage plates are hinged to each other, the front side and the rear side of the outer end of each drainage plate are each fixedly provided with a transverse rod, the axis of each transverse rod is horizontally arranged in the front-back direction, and each transverse rod is rotationally connected with a U-shaped block with a downward opening. A transverse groove in the front-back direction is formed in the end, close to the hinged shaft, of each drainage plate, a scraping plate capable of moving up and down along the transverse groove is arranged in each transverse groove, and the scraping plates can be attached to the upper end faces of the drainage plates to move left and right after moving upwards out of the transverse grooves; according to the utility model, the end parts of the two drainage plates are hinged and arranged above the side wall template of the rainwater ditch in the herringbone shape, so that the two sides of a single concrete pouring pipeline can be poured at the same time, and the pouring efficiency is greatly improved.

The present invention addresses the problem of achieving heat generation resistance, wear resistance, and stone trapping resistance. Provided is a pneumatic tire 1 that, in the tread thereof, comprises: two or more longitudinal grooves 21 and 22 that each continuously extend in the tire circumferential direction; a center transverse groove 41 that extends in the tire width direction and communicates with the longitudinal grooves; a shoulder transverse groove 51 that, in the tire width direction, communicates with the outer side of each longitudinal groove on the outermost side in the tire width direction and that extends in the tire width direction; a center block 31A that is partitioned by the longitudinal grooves and the center transverse groove 41; a shoulder block 32A that is partitioned by the longitudinal grooves and the shoulder transverse groove; and a dimple 61 that is open on the tread surface 15A in the center block, wherein the opening of the dimple is formed to have a polygonal shape, the depth of the dimple is not less than 25 [%] of the groove depth of the shoulder transverse groove, the cross-sectional shape of the dimple in the tire radial direction is formed to become smaller from the opening toward the groove bottom, and the opening area of the dimple relative to the block tread surface area is greater than 6 [%] and smaller than 20 [%].

A respiratory function exercise device effectively solves the problems that an existing weight lifting device is prone to falling and has safety risks, and when training intensity is adjusted, a balance weight needs to be found, and operation is troublesome. Comprising an H-shaped mounting frame, mounting plates are fixed to the left side and the right side of the upper end of the mounting frame correspondingly, a plurality of mounting holes are formed in the mounting plates, moving grooves are formed in the left side and the right side of the mounting frame correspondingly, moving blocks are slidably connected into the moving grooves, and T-shaped vertical grooves with downward openings are formed in the two moving blocks correspondingly; a U-shaped weight lifting rod is slidably connected into the two vertical grooves, the rear sides of the two moving grooves are communicated through a transverse groove, the left side and the right side of the transverse groove are each slidably connected with a transverse rod, and friction blocks are fixed to the opposite ends of the two transverse rods respectively; the weight lifting rod is ingenious in structure, the initial state of the weight lifting rod can be adjusted according to the height of a patient, the comfort degree of the patient during weight lifting training is increased, upper limb muscles and respiratory muscles can be trained, the lung function is enhanced, disease recovery of the patient is facilitated, and practicability is high.

The utility model provides a tire tread structure and a tire with the same. Pattern units of the tire tread structure comprise first transverse pattern blocks and second transverse pattern blocks, wherein the first transverse pattern blocks and the second transverse pattern blocks form a herringbone structure; the central pattern blocks are located between the first transverse pattern blocks and the second transverse pattern blocks, and at least part of the central pattern blocks coincide with the central plane S; wherein two longitudinal grooves are formed between the central pattern blocks of the plurality of pattern units and the transverse pattern structures of the plurality of pattern units in a surrounding manner, and the opening width W1 of each longitudinal groove and the tread width TR of the tire meet the following condition: 0.0535 TR < = W1 < = 0.0575 TR; a transverse groove is formed between every two adjacent transverse pattern structures in a surrounding mode, and the opening width W2 and the opening width W1 of each transverse groove meet the condition that W2 is larger than W1. The self-cleaning tire effectively solves the problem that the self-cleaning performance and the driving stability of the tire of the agricultural machine in the prior art are poor.

The present application relates to the technical field of machining equipment, provide a kind of drilling mechanism and section bar drilling and milling equipment, drilling mechanism includes mounting seat, track plate, first drive component and three drilling components, the track plate is erected on the mounting seat, two vertical grooves and the horizontal groove between the two vertical grooves are opened in the track plate, the first drive component is installed on the mounting seat, the output end of the first drive component is connected with the drilling component transmission, the drilling head is movably provided on the drilling component, the connecting sleeve is sleeved on the drilling head, the adjusting piece is fixed on the connecting sleeve, the slide pin is detachably inserted on the adjusting piece, three slide pins are respectively slidably assembled in two vertical grooves and the horizontal groove.This application solves the problem of poor adaptability caused by fixed drilling shaft position, and has the advantages of compact structure, good processing adaptability and high processing effect.

The tread pattern features four circumferential grooves in the form of broken lines, dividing it into five rows; the first and fifth rows each have three additional shallow wavy transverse grooves; the second and fourth rows have additional wavy transverse grooves; the transverse grooves in the first row are arc-shaped and oriented at a slight downward angle; the transverse grooves in the fifth row are arc-shaped and oriented at a slight upward angle; the second and fourth rows contain patterns formed by transverse and longitudinal grooves that match the height of two elements in the first and fifth rows; rows two and three have notches oriented diagonally from the center; the third row has notches oriented diagonally from the center.

The utility model discloses a four-season commercial vehicle tire which comprises a tire body, patterns are arranged on the surface of the tire body, the patterns are divided into center patterns and tire shoulder patterns through three straight grooves which are arranged in parallel in the circumferential direction, transverse grooves which are communicated with the three straight grooves are formed in the width direction of the center patterns, and the tire shoulder patterns are arranged in the transverse grooves. A short groove is embedded in each pitch on the two sides of the middle straight groove, and steel sheet ribs are inserted into all the pattern blocks; by means of the mode, the design of the tread pattern structure can meet the requirement for use in four seasons, and is particularly suitable for European commercial vehicles.

The tire comprises a tread (14) comprising a tread layer comprising an elastomeric material based on an elastomeric matrix comprising an elastomer, said to have a low glass transition temperature, having a glass transition temperature of less than or equal to -70°C. The first axially lateral portion (P1b) comprises a linear density DR1 of first transverse grooves (48) and a linear density DI1 of first transverse incisions (49) satisfying DR1 ≤ 0.43 cm-1 and DI1 / (DR1 + DI1) ≥ 10%. The axially central portion (P0b) comprises transverse cutouts (38, 42) each having a variable depth. Figure for abstract: Fig 2

This invention belongs to the field of hydraulic breakers, specifically a hydraulic breaker and its method. The breaker includes a side shell, a lower cylinder, and a transverse pin. A constraint groove is provided on one side of the side shell, opposite to the side shell. The transverse pin is assembled into the constraint groove from between the side shells towards the lower cylinder to press-fit and fix the transverse pin. Compared to the conventional lateral insertion method, this transverse pin ensures that the transverse pin is assembled into the transverse groove without shifting within the groove, thus preventing the formation of stepped grooves and addressing the problem of premature damage to the transverse pin or cylinder, ensuring the structural stability and durability of the breaker. It also avoids the need for a transverse pin hole in the lower cylinder and the problem of damage to the transverse pin easily causing damage to the lower cylinder and affecting subsequent construction.

The utility model relates to the technical field related to spinning, and discloses an improved double-end thread hooking device which comprises a bottom plate, a cover plate and thread hooking knives, a sliding groove is formed in the cover plate, the thread hooking knives are arranged in the sliding groove in a sliding mode, a transverse box body is connected between the two thread hooking knives, a transverse sliding groove is formed in the transverse box body, and a limiting column is arranged in the transverse sliding groove in a sliding mode. A driving mechanism is further installed on the bottom plate in a swinging mode and comprises a swinging rod, the swinging rod is provided with a limiting sliding groove, the limiting column slides in the limiting sliding groove, a transverse sliding block is arranged at an opening of the transverse sliding groove in a sliding mode, the transverse sliding block is provided with a through groove, the limiting column rotates in the through groove, and a rack is fixedly arranged on the inner wall of the transverse sliding groove. An operator only needs to press a limiting column, a center column drives an adjusting gear to move in a transverse sliding groove, so that the vertical moving amplitude of the thread hooking knife is changed, and the device has a self-locking function and is simple in operation step.

The tire of the present invention has excellent dry road performance. The tire (1) is provided with a first land portion (3) divided by a shoulder circumferential groove (5A) and a tread end (Te) in a tread portion (2). A first sipe (7) extending in the tire circumferential direction, a plurality of transverse sipes (8), and a first transverse groove (9) extending from the tread end (Te) are provided in the first land portion (3). The first sipe (7) does not communicate with the first transverse groove (9). An inner end (8i) of the transverse sipe (8) is connected to the shoulder circumferential groove (5A). An outer end (8e) of the transverse sipe (8) is connected to the first sipe (7).

First and second vehicle tires belonging to a product line, wherein the first vehicle tires have first tire widths and the second vehicle tires have second tire widths that are smaller than the first tire widths. The first vehicle tires each have a tread which has two shoulder-side profile ribs (1) with transverse grooves (6) and between the shoulder-side profile ribs (1) two adjacent profile ribs (2, 3) with transverse grooves (7, 7) rising equally and running parallel to each other and a further profile rib (4) with parallel grooves (8) with a slope opposite to the transverse grooves (7, 7') in the adjacent profile ribs (2, 3). The second vehicle tires each have a tread which includes shoulder-side profile ribs (1') with transverse grooves (6) analogous to the transverse grooves (6) of the shoulder-side profile ribs (1) of the tread of the first vehicle tires, possibly scaled, and two middle profile ribs (2', 3') with analogous structuring of the two profile ribs (2, 3) of the tread of the first vehicle tires with equally rising transverse grooves (7, 7'), but horizontally mirrored and possibly scaled.

The present application belongs to the field of radial tire. In order to solve the problem of relatively insufficient performance of traditional all-weather tire on ice and snow and in dry and wet land, the present application provides a strong grip all-weather radial tire for passenger car. Four unequal-width straight longitudinal grooves are distributed on the tread, and between the straight longitudinal grooves are pattern block A, pattern block B and pattern block C. Form I transverse groove is distributed on the pattern block A. Form II transverse groove is distributed on the pattern block B and the pattern block C, and the form II transverse groove on the two pattern blocks are 180° mirror images and are connected by 30°-38° diagonal lines. The form I transverse groove on the pattern block A is connected by 60°-70° diagonal lines with the form II transverse groove on the pattern block B. Form a, form b and form c small three-dimensional sipes are respectively distributed on the pattern block A, the pattern block B and the pattern block C. Form a small three-dimensional sipe is trapezoidal zigzag sipe, and form c small sipe is arc-shaped groove. The present application effectively improves the grip on ice and snow and in dry and wet land by the design of strong grip special area.

The application discloses an anti-rotation bearing seat and belongs to the field of bearing seats.The bearing seat comprises a base, an outer shaft fixedly arranged on the base, and an inner shaft rotatably inserted into the outer shaft through a round hole, and an anti-rotation mechanism is arranged on the outer shaft.The anti-rotation mechanism comprises an inclined block inserted into the outer shaft through a transverse groove, a locking groove which is annularly and equidistantly arranged on the outer wall of the inner shaft and is matched with the inclined block, and a spring arranged in the transverse groove.An adjusting mechanism is arranged on the outer shaft, and the adjusting mechanism comprises a pressing plate arranged in the transverse groove and away from the spring, and a screw rod which is screwedly inserted into a threaded hole away from the inclined block and is rotationally connected with the pressing plate.Through cooperation of the screw rod and the pressing plate, the tension of the spring can be flexibly adjusted, the reliable connection between the inclined block and the locking groove is ensured, and the decline of the anti-rotation effect caused by the elastic attenuation of the spring is avoided.The threaded connection structure facilitates periodical maintenance and replacement of the inclined block and the spring, improves the maintenance convenience, and prolongs the service life of the bearing seat.